Deposits [Abstract] Transaction accounts Transaction Accounts [Abstract] Noninterest-bearing checking Noninterest-bearing Deposit Liabilities Interest-bearing checking Interest-bearing Domestic Deposit, Checking Money market Deposits, Money Market Deposits Savings Deposits, Savings Deposits Certificates of deposit accounts Certificates of Deposit Accounts [Abstract] Certificates of Deposit Accounts [Abstract] 250,000 or less Time Deposits Less than Dollars 250000 The weighted average interest rate for time deposits in denominations of $250,000 or less. Greater than $250,000 Time Deposits Over Dollars 250000 Represents the aggregate amount of domestic or foreign time deposits (including certificates of deposits, individual retirement accounts and open accounts) in denominations of 250,000 dollars or more. Total certificates of deposit accounts Time Deposits Total deposits Deposits Transaction accounts Transaction Accounts Weighted Average Interest Rate [Abstract] Noninterest-bearing checking (as a percent) Noninterest Bearing Deposit Liabilities Weighted Average Interest Rate Represents the weighted average interest rate for noninterest-bearing checking deposit liabilities. Interest-bearing checking (as a percent) Interest Bearing Deposit Liabilities Weighted Average Interest Rate Represents the weighted average interest rate for interest-bearing checking deposit liabilities. Money market (as a percent) Deposits Money Market Deposits Weighted Average Interest Rate Represents the weighted average interest rate for money market deposit liabilities. Savings (as a percent) Deposits Savings Deposits Weighted Average Interest Rate Represents the weighted average interest rate for savings deposits. Certificates of deposit accounts Time Deposits Weighted Average Interest Rate Abstract Less than $100,000 (as a percent) Time Deposits Less than Dollars 250000 Weighted Average Interest Rate Represents the weighted average interest rate for time deposits in denominations of 250,000 dollars or less. Greater than $250,000 (as a percent) Time Deposits Over Dollars 250000 Weighted Average Interest Rate Represents the weighted average interest rate for time deposits in denominations of over 250,000 dollars. Total certificates of deposit accounts (as a percent) Time Deposits Weighted Average Interest Rate Represents the weighted average interest rate for time deposits. Total deposits (as a percent) Deposits Weighted Average Interest Rate Represents the weighted average interest rate for all deposits. Receivables [Abstract] Financing Receivable, Past Due [Table] Financing Receivable, Past Due [Table] Financing Receivable Portfolio Segment [Axis] Financing Receivable Portfolio Segment [Axis] Financing Receivable Portfolio Segment [Domain] Financing Receivable Portfolio Segment [Domain] Business Loans Commercial Portfolio Segment [Member] Real Estate Loans Commercial Real Estate Portfolio Segment [Member] Consumer Loans Consumer Portfolio Segment [Member] Financial Asset, Period Past Due [Axis] Financial Asset, Period Past Due [Axis] Financial Asset, Period Past Due [Domain] Financial Asset, Period Past Due [Domain] Current Financial Asset, 1 to 29 Days Past Due [Member] 30-59 Financial Asset, 30 to 59 Days Past Due [Member] 60-89 Financial Asset, 60 to 89 Days Past Due [Member] 90 Financial Asset, Equal to or Greater than 90 Days Past Due [Member] Class of Financing Receivable Type [Axis] Class of Financing Receivable [Axis] Class of Financing Receivable [Domain] Class of Financing Receivable [Domain] Commercial and industrial Commercial And Industrial Business Loan [Member] A loan, whether secured or unsecured, to a company for purposes such as seasonal working capital needs, inventory financing, equipment purchases, acquisitions and industrial needs. Franchise Franchise Business Loans [Member] Franchise Business Loans [Member] Commercial owner occupied Commercial Owner Occupied Business Loan [Member] Represents the business loans related to commercial property occupied by the owner. SBA Small Business Administration Loans [Member] Represents the information pertaining to business loans for which Small Business Administration (SBA) provides a government-backed guarantee. Agribusiness Agriculture Loans [Member] Agriculture Loans [Member] Warehouse Facilities Warehouse Facilities Business Loan [Member] Represents the information pertaining to business loans related to warehouse facilities. Commercial non-owner occupied Commercial Non Owner Occupied Real Estate Loan [Member] Represents the loans related to the commercial real estate not occupied by the owner. Multi-family Multi Family Real Estate Loan [Member] Represents the information pertaining to real estate loans in multi-family sector. One-to-four family One To Four Family Real Estate Loan [Member] Represents the information pertaining to real estate loans in one-to-four family sector. Construction Construction Loans [Member] Farmland Farmland Loans [Member] Farmland Loans [Member] Land Real Estate Land [Member] Represents the information pertaining to real estate loans in land sector. Consumer loans Other Loans Receivable [Member] Class of financing receivables related to other loans. Other information concerning the credit quality Financing Receivable, Past Due [Line Items] Current Financing Receivable, Not Past Due Days Past Due Financing Receivable, Past Due Total Gross Loans Loans and Leases Receivable, Gross Non-accruing Financing Receivable, Nonaccrual Revenue from Contract with Customer [Abstract] Revenue Recognition Revenue from Contract with Customer [Text Block] Leases [Abstract] Schedule of supplemental information Assets and Liabilities, Lessee [Table Text Block] Assets and Liabilities, Lessee [Table Text Block] Schedule of minimum contractual lease payments and other information Lessee, Operating Lease, Liability, Maturity [Table Text Block] Schedule of information related to minimum contractual lease payments Schedule of Future Minimum Rental Payments for Operating Leases [Table Text Block] Income Tax Disclosure [Abstract] Current income tax provision: Current Income Tax Expense (Benefit), Continuing Operations [Abstract] Federal Current Federal Tax Expense (Benefit) State Current State and Local Tax Expense (Benefit) Total current income tax provision Current Income Tax Expense (Benefit) Deferred income tax provision (benefit): Deferred Income Tax Expense (Benefit), Continuing Operations [Abstract] Federal Deferred Federal Income Tax Expense (Benefit) Effect of the Tax Act Tax Cuts and Jobs Act, Incomplete Accounting, Change in Tax Rate, Deferred Tax Asset, Provisional Income Tax Expense State Deferred State and Local Income Tax Expense (Benefit) Total deferred income tax provision (benefit) Deferred Income Tax Expense (Benefit), Net Deferred Income Tax Expense (Benefit), Net Total income tax provision Income Tax Expense (Benefit) Schedule of Impaired Financing Receivable [Table] Schedule of Impaired Financing Receivable [Table] Impaired Loans Financing Receivable, Impaired [Line Items] Recorded Investment Impaired Financing Receivable, Recorded Investment Unpaid Principal Balance Impaired Financing Receivable, Unpaid Principal Balance With Specific Allowance Impaired Financing Receivable, with Related Allowance, Recorded Investment Without Specific Allowance Impaired Financing Receivable, with No Related Allowance, Recorded Investment Specific Allowance for Impaired Loans Impaired Financing Receivable, Related Allowance Average Recorded Investment Impaired Financing Receivable, Average Recorded Investment Interest Income Recognized Impaired Financing Receivable, Interest Income, Accrual Method Investment in TDR Financing Receivable, Troubled Debt Restructuring, Postmodification Number of TDR loans Financing Receivable, Modifications, Number of Contracts Nonaccruing loans Impaired Financing Receivable, Unpaid Principal Balance, Nonaccrual Status Amount of unpaid principal balance of impaired financing receivables that are on nonaccrual status as of the balance sheet date with related allowance for credit losses and without related allowance for credit losses. Loans 90 days or more past due and still accruing Financing Receivable, 90 Days or More Past Due, Still Accruing Consumer mortgage loans collateralized by residential real estate, foreclosure proceedings in process Mortgage Loans in Process of Foreclosure, Amount Cover page. Document Type Document Type Document Annual Report Document Annual Report Document Transition Report Document Transition Report Document Period End Date Document Period End Date Entity File Number Entity File Number Entity Registrant Name Entity Registrant Name Entity Central Index Key Entity Central Index Key Current Fiscal Year End Date Current Fiscal Year End Date Document Fiscal Year Focus Document Fiscal Year Focus Document Fiscal Period Focus Document Fiscal Period Focus Amendment Flag Amendment Flag Entity Incorporation, State or Country Code Entity Incorporation, State or Country Code Entity Tax Identification Number Entity Tax Identification Number Entity Address, Address Line One Entity Address, Address Line One Entity Address, Address Line Two Entity Address, Address Line Two Entity Address, City or Town Entity Address, City or Town Entity Address, State or Province Entity Address, State or Province Entity Address, Postal Zip Code Entity Address, Postal Zip Code City Area Code City Area Code Local Phone Number Local Phone Number Title of 12(b) Security Title of 12(b) Security Trading Symbol Trading Symbol Security Exchange Name Security Exchange Name Entity Well-known Seasoned Issuer Entity Well-known Seasoned Issuer Entity Voluntary Filers Entity Voluntary Filers Entity Current Reporting Status Entity Current Reporting Status Entity Interactive Data Current Entity Interactive Data Current Entity Filer Category Entity Filer Category Entity Small Business Entity Small Business Entity Emerging Growth Company Entity Emerging Growth Company Entity Shell Company Entity Shell Company Entity Public Float Entity Public Float Entity Common Stock, Shares Outstanding Entity Common Stock, Shares Outstanding Documents Incorporated by Reference Documents Incorporated by Reference [Text Block] Reconciliation of Unrecognized Tax Benefits, Excluding Amounts Pertaining to Examined Tax Returns [Roll Forward] Reconciliation of Unrecognized Tax Benefits, Excluding Amounts Pertaining to Examined Tax Returns [Roll Forward] Balance at January 1 Unrecognized Tax Benefits Additions based on tax positions related to prior years Unrecognized Tax Benefits, Increase Resulting from Prior Period Tax Positions Balance at December 31 Offsetting [Abstract] Offsetting Assets [Table] Offsetting Assets [Table] Hedging Designation [Axis] Hedging Designation [Axis] Hedging Designation [Domain] Hedging Designation [Domain] Not Designated as Hedging Instrument Not Designated as Hedging Instrument [Member] Offsetting Assets [Line Items] Offsetting Assets [Line Items] Financial assets: Derivative Asset [Abstract] Gross Amounts Recognized in the Consolidated Balance Sheets Derivative Asset, Fair Value, Gross Asset Gross Amounts Offset in the Consolidated Balance Sheets Derivative Asset, Fair Value, Gross Liability Net Amounts Presented in the Consolidated Balance Sheets Derivative Asset, Fair Value, Amount Not Offset Against Collateral Financial Instruments Derivative, Collateral, Obligation to Return Securities Cash Collateral Derivative, Collateral, Obligation to Return Cash Net Amount Derivative Asset, Securities Purchased under Agreements to Resell, Securities Borrowed, Offset Against Collateral, Net of Not Subject to Master Netting Arrangement, Policy Election Financial liabilities: Derivative Liability [Abstract] Gross Amounts Recognized in the Consolidated Balance Sheets Derivative Liability, Fair Value, Gross Liability Gross Amounts Offset in the Consolidated Balance Sheets Derivative Liability, Fair Value, Gross Asset Net Amounts Presented in the Consolidated Balance Sheets Derivative Liability, Fair Value, Amount Not Offset Against Collateral Financial Instruments Derivative, Collateral, Right to Reclaim Securities Cash Collateral Derivative, Collateral, Right to Reclaim Cash Net Amount Derivative Liability, Fair Value, Offset Against Collateral, Net of Not Subject to Master Netting Arrangement, Policy Election Quarterly Financial Information Disclosure [Abstract] Interest income Interest and Dividend Income, Operating Interest expense Interest Expense Provision for credit losses Provision for Loan and Lease Losses Noninterest income Noninterest Income Noninterest expense Noninterest Expense Income tax provision Net income Net Income (Loss) Available to Common Stockholders, Basic Earnings per share: Earnings Per Share [Abstract] Basic (in dollars per share) Earnings Per Share, Basic Diluted (in dollars per share) Earnings Per Share, Diluted Summary of Company's Revenue Streams Disaggregation of Revenue [Table Text Block] Investments, All Other Investments [Abstract] Bank Owned Life Insurance Life Insurance, Corporate or Bank Owned [Text Block] Equity Method Investments and Joint Ventures [Abstract] Qualified Affordable Housing Project Investments Affordable Housing Program [Text Block] Long-term Federal Home Loan Bank Advances [Abstract] Federal Home Loan Bank Advances and Other Borrowings Federal Home Loan Bank Advances, Disclosure [Text Block] Business Combinations [Abstract] Net interest and other income Business Acquisitions Pro Forma Net Interest and Other Income The pro forma net interest and other income for the period as if the business combination or combinations had been completed at the beginning of a period. Net income Business Acquisition, Pro Forma Net Income (Loss) Basic earnings per share (in dollars per share) Business Acquisition, Pro Forma Earnings Per Share, Basic Diluted earnings per share (in dollars per share) Business Acquisition, Pro Forma Earnings Per Share, Diluted Condensed Financial Information Disclosure [Abstract] Condensed Financial Statements [Table] Condensed Financial Statements [Table] Consolidated Entities [Axis] Consolidated Entities [Axis] Consolidated Entities [Domain] Consolidated Entities [Domain] Corporation Parent Company [Member] Parent Company Financial Information Condensed Financial Statements, Captions [Line Items] Income Interest and Dividend Income, Operating [Abstract] Dividend income from the Bank Dividend Income From Subsidiaries Dividend Income From Subsidiaries Interest income Interest Income, Operating Total income Interest and Non Interest Income Operating Represents the total of interest and dividend income, and the total amount of noninterest income which may be derived from: (1) fees and commissions; (2) premiums earned; (3) insurance policy charges; (4) the sale or disposal of assets; and (5) other sources not otherwise specified. Expense Interest Expense [Abstract] Subordinated debentures Interest Expense, Subordinated Notes and Debentures Compensation and benefits Labor and Related Expense Total expense Interest and Non Interest Expense The cost of borrowed funds accounted for as interest, and the total amount of all noninterest expense that was charged against earnings during the period. INCOME BEFORE INCOME TAXES Income (Loss) from Continuing Operations before Equity Method Investments, Income Taxes, Noncontrolling Interest Income tax Equity in undistributed earnings of subsidiary Income (Loss) from Subsidiaries, Net of Tax Equity in undistributed earnings of subsidiary Equity in Undistributed Net Income (Loss) of Subsidiaries Equity in Undistributed Net Income (Loss) of Subsidiaries Components of deferred tax assets (liabilities) Components of Deferred Tax Assets and Liabilities [Abstract] Deferred tax assets: Components of Deferred Tax Assets [Abstract] Accrued expenses Deferred Tax Assets, Tax Deferred Expense, Reserves and Accruals, Accrued Liabilities Net operating loss Deferred Tax Assets, Operating Loss Carryforwards Allowance for loan losses, net of bad debt charge-offs Deferred Tax Assets, Tax Deferred Expense, Reserves and Accruals, Provision for Loan Losses Deferred compensation Deferred Tax Assets, Tax Deferred Expense, Compensation and Benefits, Employee Compensation State taxes Deferred Tax Assets, State Taxes Loan discount Deferred Tax Assets, Loan Discount Deferred Tax Assets, Loan Discount Stock-based compensation Deferred Tax Assets, Tax Deferred Expense, Compensation and Benefits, Share-based Compensation Cost Unrealized loss on available for sale securities Deferred Tax Assets, Unrealized Losses on Available-for-Sale Securities, Gross Operating lease liabilities Deferred Tax Assets, Operating Lease, Liability Deferred Tax Assets, Operating Lease, Liability AMT credit and other state tax credit carryovers Deferred Tax Assets, Tax Credit Carryforwards, Alternative Minimum Tax Total deferred tax assets Deferred Tax Assets, Net of Valuation Allowance Deferred tax liabilities: Components of Deferred Tax Liabilities [Abstract] Operating lease right-of-use assets Deferred Tax Liabilities, Operating Lease, Right-of-Use Asset Deferred Tax Liabilities, Operating Lease, Right-of-Use Asset Deferred FDIC gain Deferred Tax Liabilities, Tax Deferred Income Core deposit intangibles Deferred Tax Liabilities, Intangible Assets Loan origination costs Deferred Tax Liabilities, Loan Origination Costs Deferred Tax Liabilities, Loan Origination Costs Depreciation Deferred Tax Liabilities, Property, Plant and Equipment Unrealized gain on available for sale securities Deferred Tax Liabilities, Unrealized Losses on Available-for-Sale Securities, Gross Deferred Tax Liabilities, Unrealized Losses on Available-for-Sale Securities, Gross Other Deferred Tax Liabilities, Other Total deferred tax liabilities Deferred Tax Liabilities, Gross Valuation allowance Deferred Tax Assets, Valuation Allowance Net deferred tax (liabilities) asset Deferred Tax Liabilities, Net Net deferred tax (liabilities) asset Deferred Tax Assets, Net Subsequent Events [Abstract] Subsequent Events Subsequent Events [Text Block] Balance Sheet: Balance Sheet [Abstract] Balance Sheet [Abstract] Operating lease right of use assets Operating Lease, Right-of-Use Asset Operating lease liabilities Operating Lease, Liability Cash Flows: Cash Flow, Operating Activities, Lessee [Abstract] Operating cash flows from operating leases Operating Lease, Payments Number of areas where the entity's credit quality is maintained and credit risk managed Financing Receivable, Credit Quality and Credit Risk Management, Area Number Represents the number of areas related to financing receivables where the entity's credit quality is maintained and credit risk managed. Number of Pass scale grades Financing Receivable, Credit Quality, Pass Grade Number Represents the number of subcategories established within pass grade to stratify risk associated with pass loans. Financing Receivable, Credit Quality Indicator [Table] Financing Receivable, Credit Quality Indicator [Table] Internal Credit Assessment [Axis] Internal Credit Assessment [Axis] Internal Credit Assessment [Domain] Internal Credit Assessment [Domain] Pass Pass [Member] Special Mention Special Mention [Member] Substandard Substandard [Member] Doubtful Doubtful [Member] Credit Risk Grades Financing Receivable, Credit Quality Indicator [Line Items] Gross loans Property, Plant and Equipment [Abstract] Premises and Equipment Property, Plant and Equipment Disclosure [Text Block] Schedule of components of income taxes Schedule of Components of Income Tax Expense (Benefit) [Table Text Block] Schedule of reconciliation from statutory federal income taxes to the Company's effective income taxes Schedule of Effective Income Tax Rate Reconciliation [Table Text Block] Schedule of deferred tax assets (liabilities) comprised of the temporary differences between the financial statement carrying amounts and the tax basis of assets Schedule of Deferred Tax Assets and Liabilities [Table Text Block] Reconciliation of unrecognized tax benefits Summary of Income Tax Contingencies [Table Text Block] Goodwill and Intangible Assets Disclosure [Abstract] Gross Balance of CDI: Finite-Lived Intangible Assets, Gross [Abstract] Balance, beginning of year Finite-Lived Intangible Assets, Gross Additions due to acquisitions Finite-lived Intangible Assets Acquired Balance, end of year Accumulated amortization: Finite LIved Intangible Assets, Accumulated Amortization [Abstract] Finite LIved Intangible Assets, Accumulated Amortization [Abstract] Balance, beginning of year Finite-Lived Intangible Assets, Accumulated Amortization Amortization Amortization of Intangible Assets Balance, end of year Net CDI, end of year Finite-Lived Intangible Assets, Net Property, Plant and Equipment [Table] Property, Plant and Equipment [Table] Property, Plant and Equipment, Type [Axis] Property, Plant and Equipment, Type [Axis] Property, Plant and Equipment, Type [Domain] Property, Plant and Equipment, Type [Domain] Land Land [Member] Premises Building [Member] Leasehold improvements Leasehold Improvements [Member] Furniture, fixtures and equipment Furniture Fixtures And Equipment [Member] Furniture and fixture represents equipment commonly used in offices and stores that have no permanent connection to the structure of a building or utilities. Equipment represents tangible personal property used to produce goods and services. Automobiles Automobiles [Member] Premises and Equipment Property, Plant and Equipment [Line Items] Property and equipment Property, Plant and Equipment, Gross Less: accumulated depreciation Accumulated Depreciation, Depletion and Amortization, Property, Plant, and Equipment Total Property, Plant and Equipment, Net Depreciation expense for premises and equipment Depreciation Investments, Debt and Equity Securities [Abstract] Investment Securities Investments in Debt and Marketable Equity Securities (and Certain Trading Assets) Disclosure [Text Block] Provision for Loan and Lease Losses [Abstract] Summary of allocation of the allowance as well as the activity in the allowance attributed to various segments in the loan portfolio Financing Receivable, Allowance for Credit Loss [Table Text Block] Income Statement [Abstract] Statement [Table] Statement [Table] Product and Service [Axis] Product and Service [Axis] Product and Service [Domain] Product and Service [Domain] Service charges on deposit accounts Deposit Account [Member] Other service fee income Financial Service, Other [Member] Debit card interchange fee income Debit Card [Member] Statement [Line Items] Statement [Line Items] INTEREST INCOME Loans Interest and Fee Income, Loans and Leases Investment securities and other interest-earning assets Interest and Dividend Income Securities and Other Interest and dividend income on all securities plus interest earned on other assets not otherwise specified in the taxonomy. Total interest income INTEREST EXPENSE Deposits Interest Expense, Deposits FHLB advances and other borrowings Interest Expense Federal Home Loan Bank Advances and Other Borrowings Interest expense incurred during the reporting period on borrowings associated with Federal Home Loan Bank advances and other borrowings not otherwise specified in the taxonomy. Total interest expense Net interest income before provision for credit losses Interest Income (Expense), Net Provision for credit losses Financing Receivable, Credit Loss, Expense (Reversal) Net interest income after provision for credit losses Interest Income (Expense), after Provision for Loan Loss NONINTEREST INCOME Noninterest Income [Abstract] Loan servicing fees Loan Servicing Fees Loan Servicing Fees Noninterest income Revenue from Contract with Customer, Excluding Assessed Tax Earnings on bank-owned life insurance Bank Owned Life Insurance Income Net gain from sales of loans Gain (Loss) on Sales of Loans, Net Net gain from sales of investment securities Debt and Equity Securities, Gain (Loss) Other income Noninterest Income, Other Operating Income Total noninterest income NONINTEREST EXPENSE Noninterest Expense [Abstract] Premises and occupancy Occupancy, Net Data processing Communications and Information Technology Other real estate owned operations, net Other Real Estate Owned Operations Net This element represents the fair value losses recognized as a result of valuations performed subsequent to foreclosure. FDIC insurance premiums Federal Deposit Insurance Corporation Premium Expense Legal, audit and professional expense Professional Fees Marketing expense Marketing Expense Office, telecommunications and postage expense Supplies and Postage Expense Loan expense Debt Related Commitment Fees and Debt Issuance Costs Deposit expense Deposit Expense Represents the amount of expenses incurred by the entity relating to deposits made by it. Merger-related expense Business Combination, Integration Related Costs CDI amortization Other expense Other Noninterest Expense Total noninterest expense NET INCOME Net Income (Loss) Attributable to Parent EARNINGS PER SHARE WEIGHTED AVERAGE SHARES OUTSTANDING Weighted Average Number of Shares Outstanding, Diluted [Abstract] Basic (in shares) Weighted Average Number of Shares Outstanding, Basic Diluted (in shares) Weighted Average Number of Shares Outstanding, Diluted Interest expense on deposit accounts Interest Expense on Deposit Liabilities, Disclosures [Abstract] Checking accounts Interest Expense, Demand Deposit Accounts Money market accounts Interest Expense, Savings Deposits Savings Interest Expense, Money Market Deposits Certificates of deposit accounts Interest Expense, Time Deposits Total Accrued interest on deposits Deposit Liabilities, Accrued Interest Schedule of Goodwill [Table] Schedule of Goodwill [Table] Business Acquisition [Axis] Business Acquisition [Axis] Business Acquisition, Acquiree [Domain] Business Acquisition, Acquiree [Domain] Grandpoint Capital, Inc. Grandpoint Capital, Inc. [Member] Grandpoint Capital, Inc. [Member] Plaza Bancorp Plaza Bancorp [Member] Plaza Bancorp [Member] Heritage Oaks Bank Heritage Oaks Bancorp [Member] Heritage Oaks Bancorp [Member] Finite-Lived Intangible Assets by Major Class [Axis] Finite-Lived Intangible Assets by Major Class [Axis] Finite-Lived Intangible Assets, Major Class Name [Domain] Finite-Lived Intangible Assets, Major Class Name [Domain] Core Deposits Core Deposits [Member] Statistical Measurement [Axis] Statistical Measurement [Axis] Statistical Measurement [Domain] Statistical Measurement [Domain] Minimum Minimum [Member] Maximum Maximum [Member] Goodwill [Line Items] Goodwill [Line Items] Goodwill Goodwill Goodwill adjustments Goodwill, Purchase Accounting Adjustments Goodwill acquired during the year Goodwill, Acquired During Period Impairment losses Goodwill, Impairment Loss Net CDI Weighted average useful life (in years) Acquired Finite-lived Intangible Assets, Weighted Average Useful Life Estimated aggregate amortization expense Finite-Lived Intangible Assets, Net, Amortization Expense, Fiscal Year Maturity [Abstract] 2020 Finite-Lived Intangible Assets, Amortization Expense, Next Twelve Months 2021 Finite-Lived Intangible Assets, Amortization Expense, Year Two 2022 Finite-Lived Intangible Assets, Amortization Expense, Year Three 2023 Finite-Lived Intangible Assets, Amortization Expense, Year Four 2024 Finite-Lived Intangible Assets, Amortization Expense, Year Five Statement of Stockholders' Equity [Abstract] Equity Components [Axis] Equity Components [Axis] Equity Component [Domain] Equity Component [Domain] Common Stock Common Stock [Member] Additional Paid-in Capital Additional Paid-in Capital [Member] Accumulated Retained Earnings Retained Earnings [Member] Accumulated Other Comprehensive Income (Loss) AOCI Attributable to Parent [Member] Increase (Decrease) in Stockholders' Equity Increase (Decrease) in Stockholders' Equity [Roll Forward] Balance Stockholders' Equity Attributable to Parent Balance (in shares) Common Stock, Shares, Issued Net Income Other comprehensive income (loss) Other Comprehensive Income (Loss), Available-for-sale Securities Adjustment, Net of Tax, Portion Attributable to Parent Share-based compensation expense APIC, Share-based Payment Arrangement, Increase for Cost Recognition Issuance of restricted stock, net Stock Issued During Period, Value, Restricted Stock Award, Net of Forfeitures Issuance of restricted stock, net (in shares) Stock Issued During Period, Shares, Restricted Stock Award, Net of Forfeitures Issuance of common stock Stock Issued During Period, Value, New Issues Issuance of common stock (in shares) Stock Issued During Period, Shares, New Issues Goodwill adjustment Adjustments to Additional Paid in Capital, Goodwill Adjustments to Additional Paid in Capital, Goodwill Restricted stock surrendered and canceled Stock Issued During Period, Value, Restricted Stock Award, Forfeitures Restricted stock surrendered and canceled (in shares) Stock Issued During Period, Shares, Restricted Stock Award, Forfeited Repurchase and retirement of common stock Stock Repurchased and Retired During Period, Value Repurchase of common stock (in shares) Stock Repurchased and Retired During Period, Shares Cash dividends declared ($0.88 per share) Dividends, Common Stock, Cash Dividend equivalents declared ($0.88 per restricted stock units) Dividend, Share-based Payment Arrangement Exercise of stock options, net Stock Issued During Period, Value, Stock Options Exercised Exercise of stock options (in shares) Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period Reclassification of certain tax effects of the Tax Cuts and Jobs Act Tax Cuts and Jobs Act, Reclassification from AOCI to Retained Earnings, Tax Effect Balance Balance (in shares) Schedule of Business Acquisitions, by Acquisition [Table] Schedule of Business Acquisitions, by Acquisition [Table] Cash and Cash Equivalents [Axis] Cash and Cash Equivalents [Axis] Cash and Cash Equivalents [Domain] Cash and Cash Equivalents [Domain] Bank Time Deposits Bank Time Deposits [Member] Business Acquisition [Line Items] Business Acquisition [Line Items] ASSETS ACQUIRED Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Assets [Abstract] Cash and cash equivalents Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Cash and Equivalents Investment securities Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Assets, Marketable Securities Loans, gross Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Gross Loans Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Gross Loans Allowance for loan losses Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Allowance for Loan Losses Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Allowance for Loan Losses Fixed assets Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Property, Plant, and Equipment Core deposit intangible Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Intangible Assets, Other than Goodwill Deferred tax assets Business Combination Recognized Identifiable Assets Acquired and Liabilities Assumed, Deferred Tax Assets Other assets Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Other Noncurrent Assets Total assets acquired Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Assets LIABILITIES ASSUMED Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Liabilities [Abstract] Deposits Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Deposits The amount of acquisition cost of a business combination allocated to deposits assumed from the acquired entity. Borrowings Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Liabilities, Long-term Debt Other Liabilities Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Noncurrent Liabilities, Other Total liabilities assumed Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Liabilities Excess of assets acquired over liabilities assumed Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Net Consideration paid Business Combination, Consideration Transferred Goodwill recognized Fair Value Adjustment Business Combination, Provisional Information, Initial Accounting Incomplete, Adjustments [Abstract] Cash and cash equivalents Business Combination, Provisional Accounting, Initial Accounting Incomplete, Adjustment, Cash and Equivalents Business Combination, Provisional Accounting, Initial Accounting Incomplete, Adjustment, Cash and Equivalents Investment securities Business Combination, Provisional Information, Initial Accounting Incomplete, Adjustment, Current Assets, Marketable Securities Business Combination, Provisional Information, Initial Accounting Incomplete, Adjustment, Current Assets, Marketable Securities Loans, gross Business Combination, Provisional Information, Initial Accounting Incomplete, Adjustment, Loans Business Combination, Provisional Information, Initial Accounting Incomplete, Adjustment, Loans Allowance for loan losses Business Combination, Provisional Information, Initial Accounting Incomplete, Adjustment, Allowance for Loan Losses Business Combination, Provisional Information, Initial Accounting Incomplete, Adjustment, Allowance for Loan Losses Fixed assets Business Combination, Provisional Information, Initial Accounting Incomplete, Adjustment, Property, Plant, and Equipment Core deposit intangible Business Combination, Provisional Information, Initial Accounting Incomplete, Adjustment, Intangibles Deferred tax assets Business Combination, Provisional Information, Initial Accounting Incomplete, Adjustment, Deferred Tax Assets Business Combination, Provisional Information, Initial Accounting Incomplete, Adjustment, Deferred Tax Assets Other assets Business Combination, Provisional Information, Initial Accounting Incomplete, Adjustment, Other Noncurrent Assets Business Combination, Provisional Information, Initial Accounting Incomplete, Adjustment, Other Noncurrent Assets Total assets acquired Business Combination, Provisional Information, Initial Accounting Incomplete, Adjustment, Assets Business Combination, Provisional Information, Initial Accounting Incomplete, Adjustment, Assets Deposits Business Combination, Provisional Information, Initial Accounting Incomplete, Adjustment, Deposits Business Combination, Provisional Information, Initial Accounting Incomplete, Adjustment, Deposits Borrowings Business Combination, Provisional Information, Initial Accounting Incomplete, Adjustment, Current Liabilities, Long-term Debt Business Combination, Provisional Information, Initial Accounting Incomplete, Adjustment, Current Liabilities, Long-term Debt Other Liabilities Business Combination, Provisional Information, Initial Accounting Incomplete, Adjustment, Noncurrent Liabilities, Other Business Combination, Provisional Information, Initial Accounting Incomplete, Adjustment, Noncurrent Liabilities, Other Total liabilities assumed Business Combination, Provisional Information, Initial Accounting Incomplete, Adjustment, Liabilities Business Combination, Provisional Information, Initial Accounting Incomplete, Adjustment, Liabilities Excess of assets acquired over liabilities assumed Business Combination, Provisional Information, Initial Accounting Incomplete, Adjustment, Recognized Identifiable Assets Acquired and Liabilities Assumed, Net Business Combination, Provisional Information, Initial Accounting Incomplete, Adjustment, Recognized Identifiable Assets Acquired and Liabilities Assumed, Net Schedule of Accounts, Notes, Loans and Financing Receivable [Table] Schedule of Accounts, Notes, Loans and Financing Receivable [Table] Purchase discounts Purchase discounts [Member] Purchase discounts [Member] Long-term Debt, Type [Axis] Long-term Debt, Type [Axis] Long-term Debt, Type [Domain] Long-term Debt, Type [Domain] Secured Debt Secured Debt [Member] Unsecured Debt Unsecured Debt [Member] Loans Held for Investment Accounts, Notes, Loans and Financing Receivable [Line Items] Gross loans held for investment Loans Receivable Gross Excluding Loans Receivable Held For Sale Loans Receivable Gross Excluding Loans Receivable Held For Sale Deferred loan origination fees and discounts, net Unamortized Loan Commitment and Origination Fees and Unamortized Discounts or Premiums Loans held for investment Loans and Leases Receivable, Net of Unaccreted Fair Value Purchase Discounts Loans and Leases Receivable, Net of Unaccreted Fair Value Purchase Discounts Allowance for loan losses Loans and Leases Receivable, Allowance Loans held for investment, net Loans and Leases Receivable, Net Amount Less loans held for sale, net Loans Receivable Held-for-sale, Net, Not Part of Disposal Group Servicing rights retained from guaranteed portion of SBA loans sold Servicing Asset Unpaid principal balance for loans and participations serviced for others Loans to Others Outstanding Balance Represents the outstanding balance, as of the balance sheet date, of loans serviced for others. Secured loans to one borrower, limit Secured Loans to One Borrower Limit Represents the amount up to which the bank can provide loans on secured basis to one borrower as per current regulations. Unsecured loans to one borrower, limit Unsecured Loans to One Borrower Limit Represents the amount up to which the bank can provide loans on unsecured basis to one borrower as per current regulations. Secured loans to one borrower, outstanding balance Secured Loans to One Borrower, Outstanding Balance Represents the outstanding balance as of the balance sheet date of loans to one borrower of secured credit. FHLB stock Federal Home Loan Bank Stock Federal Reserve Bank Stock Federal Reserve Bank Stock Other stock Stock Other than Federal Home Loan Bank and Federal Reserve Bank Stock Represents the amount of stock other than Federal Home Loan Bank stock and Federal Reserve Bank stock. FHLB repurchases Excess Federal Home Loan Bank Stock with Entity Repurchased by Federal Home Loan Bank Represents the amount of excess FHLB stock repurchased by FHLB through the stock repurchase program. Disaggregation of Revenue [Table] Disaggregation of Revenue [Table] Adjustments for New Accounting Pronouncements [Axis] Adjustments for New Accounting Pronouncements [Axis] Type of Adoption [Domain] Type of Adoption [Domain] Within Scope Within Scope of Topic 606 [Member] Within Scope of Topic 606 [Member] Out of Scope Out of Scope of Topic 606 [Member] Out of Scope of Topic 606 [Member] Debit card interchange income Disaggregation of Revenue [Line Items] Disaggregation of Revenue [Line Items] Net gain from sales of loans Other income Retirement Benefits [Abstract] Schedule of Share-based Compensation Arrangements by Share-based Payment Award [Table] Schedule of Share-based Compensation Arrangements by Share-based Payment Award [Table] Plan Name [Axis] Plan Name [Axis] Plan Name [Domain] Plan Name [Domain] 2004 Long-Term Incentive Plan Long Term Incentive Plan2004 [Member] Represents the 2004 Long-Term Incentive Plan (the Plan) of the entity. 2012 Plan Long Term Incentive Plan2012 [Member] Represents the 2012 Long-Term Incentive Plan of the entity. 2014 Plan Long Term Incentive Plan 2014 [Member] Long Term Incentive Plan 2014 [Member] 2017 Plan Long Term Incentive Plan2017 [Member] Long Term Incentive Plan2017 [Member] 2015 Equity Based Compensation Plan Equity Based Compensation Plan 2015 [Member] Equity Based Compensation Plan 2015 [Member] 2005 Long-Term Incentive Plan Long Term Incentive Plan2005 [Member] Long Term Incentive Plan2005 [Member] Share based plans Share-based Compensation Arrangement by Share-based Payment Award [Line Items] Shares authorized Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Authorized Term of plan (in years) Share Based Compensation Arrangement by Share Based Payment Award Term of Plan Represents the period in which the plan would be in effect, starting from the day the plan was adopted. Vesting percentage per year Share Based Compensation Arrangement by Share Based Payment Award Options Granted Vesting Percentage Per Year Represents the percentage at which the options granted under the plan would vest per year. Award vesting period (in years) Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period Shares issued ratio, actual number of shares Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Issued Ratio, Actual Amount Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Issued Ratio, Actual Amount Number of options outstanding (in shares) Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Number Granted (in shares) Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Gross Benefit Plans Pension and Other Postretirement Benefits Disclosure [Text Block] Cash dividends declared (in dollars per share) Common Stock, Dividends, Per Share, Declared Dividend equivalents declared (in dollars per share) Dividends, Share-based Compensation, Per Share, Declared Dividends, Share-based Compensation, Per Share, Declared Expense associated with leases Lease, Cost Operating lease expense Operating Lease, Cost Short-term lease expense Short-term Lease, Cost Rental income Operating Lease, Lease Income Deposit Accounts Deposit Liabilities Disclosures [Text Block] Other Real Estate [Abstract] Other Real Estate Owned Other Real Estate [Roll Forward] Balance, beginning of year Real Estate Acquired Through Foreclosure Acquisitions Other Real Estate, Additions Foreclosures Other Real Estate, Additions, Foreclosures Other Real Estate, Additions, Foreclosures Sales Other Real Estate, Disposals Gain (loss) on sale Other Real Estate Gain (Loss) on Disposals Represents the increase (decrease) in value of other real estate due to write downs or gain (loss) on sales. Write downs Other Real Estate Increase (Decrease) Due to Write Downs and Sales Represents the increase (decrease) in value of other real estate due to write downs or gain (loss) on sales and other disposals. Balance, end of year Operating leases Lessee, Operating Lease, Liability, Payment, Due [Abstract] 2019 Lessee, Operating Lease, Liability, Payments, Due Next Twelve Months 2020 Lessee, Operating Lease, Liability, Payments, Due Year Two 2021 Lessee, Operating Lease, Liability, Payments, Due Year Three 2022 Lessee, Operating Lease, Liability, Payments, Due Year Four 2023 Lessee, Operating Lease, Liability, Payments, Due Year Five Thereafter Lessee, Operating Lease, Liability, Payments, Due after Year Five Total Lessee, Operating Lease, Liability, Payments, Due Short-term leases Operating Lease Liabilities, Short-term, Payments Due [Abstract] Operating Lease Liabilities, Short-term, Payments Due [Abstract] 2019 Lessee, Operating Lease, Liability, Short-term, Payments, Due Next Twelve Months Lessee, Operating Lease, Liability, Short-term, Payments, Due Next Twelve Months 2020 Lessee, Operating Lease, Liability, Short-term, Payments, Due Year Two Lessee, Operating Lease, Liability, Short-term, Payments, Due Year Two 2021 Lessee, Operating Lease, Liability, Short-term, Payments, Due Year Three Lessee, Operating Lease, Liability, Short-term, Payments, Due Year Three 2022 Lessee, Operating Lease, Liability, Short-term, Payments, Due Year Four Lessee, Operating Lease, Liability, Short-term, Payments, Due Year Four 2023 Lessee, Operating Lease, Liability, Short-term, Payments, Due Year Five Lessee, Operating Lease, Liability, Short-term, Payments, Due Year Five Thereafter Lessee, Operating Lease, Liability, Short-term, Payments, Due after Year Five Lessee, Operating Lease, Liability, Short-term, Payments, Due after Year Five Total Lessee, Operating Lease, Liability, Short-term, Payments, Due Lessee, Operating Lease, Liability, Short-term, Payments, Due Total contractual base rents Operating Lease Liabilities, Contractual Base Rents, Payments Due [Abstract] Operating Lease Liabilities, Contractual Base Rents, Payments Due [Abstract] 2019 Lessee, Operating Lease, Liability, Contractual Base Rents, Payments, Due Next Twelve Months Lessee, Operating Lease, Liability, Contractual Base Rents, Payments, Due Next Twelve Months 2020 Lessee, Operating Lease, Liability, Contractual Base Rents, Payments, Due Year Two Lessee, Operating Lease, Liability, Contractual Base Rents, Payments, Due Year Two 2021 Lessee, Operating Lease, Liability, Contractual Base Rents, Payments, Due Year Three Lessee, Operating Lease, Liability, Contractual Base Rents, Payments, Due Year Three 2022 Lessee, Operating Lease, Liability, Contractual Base Rents, Payments, Due Year Four Lessee, Operating Lease, Liability, Contractual Base Rents, Payments, Due Year Four 2023 Lessee, Operating Lease, Liability, Contractual Base Rents, Payments, Due Year Five Lessee, Operating Lease, Liability, Contractual Base Rents, Payments, Due Year Five Thereafter Lessee, Operating Lease, Liability, Contractual Base Rents, Payments, Due after Year Five Lessee, Operating Lease, Liability, Contractual Base Rents, Payments, Due after Year Five Total Lessee, Operating Lease, Liability, Contractual Base Rents, Payments, Due Lessee, Operating Lease, Liability, Contractual Base Rents, Payments, Due Total liability to make lease payments Operating Lease, Long-term and Short-term, Liability Operating Lease, Long-term and Short-term, Liability Difference in undiscounted and discounted future lease payments Lessee, Operating Lease, Long-term and Short-term, Liability, Undiscounted Excess Amount Lessee, Operating Lease, Long-term and Short-term, Liability, Undiscounted Excess Amount Weighted average discount rate Operating Lease, Weighted Average Discount Rate, Percent Weighted average remaining lease term (years) Operating Lease, Weighted Average Remaining Lease Term Subsequent Event [Table] Subsequent Event [Table] Subsequent Event Type [Axis] Subsequent Event Type [Axis] Subsequent Event Type [Domain] Subsequent Event Type [Domain] Subsequent Event Subsequent Event [Member] Opus Opus Bank [Member] Opus Bank [Member] Legal Entity [Axis] Legal Entity [Axis] Entity [Domain] Entity [Domain] Scenario [Axis] Scenario [Axis] Scenario [Domain] Scenario [Domain] Pro Forma Pro Forma [Member] Subsequent Event [Line Items] Subsequent Event [Line Items] Cash dividend declared (in dollars per share) Value of company stock (in dollars per share) Business Acquisition, Share Price Closing price for the Corporation's common stock (in dollars per share) Share Price Equity issued shares Business Acquisition, Equity Interests Issued or Issuable Number of Shares Issued Ratio Business Acquisition, Equity Interests Issued or Issuable Number of Shares Issued Ratio Number of shares of common stock issued as consideration (in shares) Business Acquisition, Equity Interest Issued or Issuable, Number of Shares Total assets Assets Gross loans acquired Total deposits Number of banking offices Business Combination, Number of Banking Offices Business Combination, Number of Banking Offices Total assets acquired on a pro forma basis Percentage of capital stock of the Bank held Subsidiary or Equity Method Investee, Cumulative Percentage Ownership after All Transactions Parent Company Financial Information Assets Assets [Abstract] Cash and cash equivalents Cash, Cash Equivalents, and Federal Funds Sold Investment in subsidiaries Investments in and Advance to Affiliates, Subsidiaries, Associates, and Joint Ventures Other assets Other Assets Total assets Liabilities Liabilities [Abstract] Subordinated debentures Subordinated Debt Accrued expenses and other liabilities Accrued Liabilities and Other Liabilities Total liabilities Liabilities Total Stockholders’ Equity Total liabilities and stockholders’ equity Liabilities and Equity Bank owned life insurance Bank Owned Life Insurance Income from bank owned life insurance, non-interest income Bank Owned Life Insurance Non-interest Income Bank Owned Life Insurance Non-interest Income Goodwill and Core Deposit Intangibles Goodwill and Intangible Assets Disclosure [Text Block] Investment in LIHTC Projects Activity in Affordable Housing Program Obligation [Table Text Block] Derivative Instruments and Hedging Activities Disclosure [Abstract] Derivative [Table] Derivative [Table] Derivative Instrument [Axis] Derivative Instrument [Axis] Derivative Contract [Domain] Derivative Contract [Domain] Interest rate swap contracts Interest Rate Swap [Member] Derivative [Line Items] Derivative [Line Items] Notional Derivative Asset, Notional Amount Derivative assets, fair value Derivative liabilities, fair value Debt Disclosure [Abstract] Schedule of Long-term Debt Instruments [Table] Schedule of Long-term Debt Instruments [Table] Subordinated notes Subordinated Debt [Member] Debt Instrument [Line Items] Debt Instrument [Line Items] Average balance outstanding Debt Average Outstanding Amount Represents the average borrowings during the period, for the form of debt having an initial term of one year or more than the normal operating cycle, if longer. Weighted average rate Debt, Weighted Average Interest Rate Maximum amount outstanding at any month-end during the year Debt Maximum Month End Outstanding Amount Represents the maximum month-end borrowings during the period, for the form of debt having an initial term of one year or more than the normal operating cycle, if longer. Balance outstanding at end of year Other Borrowings Weighted average interest rate at year-end Debt Instrument, Interest Rate During Period Subordinated debt Junior Subordinated Debt [Member] Debt Instrument [Axis] Debt Instrument [Axis] Debt Instrument, Name [Domain] Debt Instrument, Name [Domain] Subordinated notes due 2024, 5.75% per annum Subordinated Notes 5.75 Percent Due 2024 [Member] Represents information pertaining to 5.75% Subordinated Notes Due 2024. Subordinated notes due 2029, 4.875% per annum until May 15, 2024, 3-month LIBOR 2.5% thereafter Subordinated Notes, 4.875%, Due May 15, 2029 [Member] Subordinated Notes, 4.875%, Due May 15, 2029 [Member] Subordinated notes due 2025, 7.125% per annum Subordinated Notes 7.125%, Due 2025 [Member] Subordinated Notes 7.125%, Due 2025 [Member] PPBI Trust I P P B I Trust I [Member] Represents information pertaining to PPBI Trust I, a statutory trust created under the laws of the State of Delaware. Counterparty Name [Axis] Counterparty Name [Axis] Counterparty Name [Domain] Counterparty Name [Domain] Santa Lucia Bancorp (CA) Capital Trust Santa Lucia Bancorp (CA) Capital Trust [Member] Santa Lucia Bancorp (CA) Capital Trust [Member] Mission Community Capital Trust I Mission Community Capital Trust I [Member] Mission Community Capital Trust I [Member] First Commerce Bancorp Statutory Trust I First Commerce Bancorp Statutory Trust I [Member] First Commerce Bancorp Statutory Trust I [Member] Variable Rate [Axis] Variable Rate [Axis] Variable Rate [Domain] Variable Rate [Domain] LIBOR London Interbank Offered Rate (LIBOR) [Member] Current Interest Rate Debt Instrument, Interest Rate, Stated Percentage Current Interest Rate Debt Instrument, Interest Rate, Effective Percentage Variable rate Debt Instrument, Basis Spread on Variable Rate Current Principal Balance Debt Instrument, Face Amount Financing Receivable, Allowance for Credit Loss [Table] Financing Receivable, Allowance for Credit Loss [Table] Owner Occupied Commercial Real Estate Loans Commercial and Industrial Loans and Small Business Administration Loans Owner Occupied Commercial Real Estate Loans Commercial And Industrial Loans And Small Business Administration Loans [Member] Represents information pertaining to owner occupied commercial real estate loans, commercial and industrial loans and SBA loans. Allowance for Loan Losses Financing Receivable, Allowance for Credit Loss [Line Items] Period one considered for comparison of allowance for loan losses factor Period One Considered for Comparison of Allowance for Loan Losses Factor Represents the period during which the charge-off data for all FDIC insured commercial banks and saving institutions based in California are considered for comparison of the entity's allowance for loan losses factor. Period considered for comparison of allowance for loan losses factor Period Two Considered for Comparison of Allowance for Loan Losses Factor Represents the period during which the charge-off data of all FDIC insured commercial banks and saving institutions based in California are considered for comparison of the entity's allowance for loan losses factor. Allocation of allowance as well as the activity in allowance Allowance for Loan and Lease Losses [Roll Forward] Balance, at the beginning of the period Charge-offs Allowance for Loan and Lease Losses, Write-offs Recoveries Allowance for Loan and Lease Loss, Recovery of Bad Debts Provisions for (reduction in) loan losses Balance, at the end of the period Amount of allowance attributed to: Loans and Leases Receivable, Other Information [Abstract] Specifically evaluated impaired loans Financing Receivable, Allowance for Credit Losses, Individually Evaluated for Impairment General portfolio allocation Financing Receivable, Allowance for Credit Losses, Collectively Evaluated for Impairment Loans individually evaluated for impairment Financing Receivable, Individually Evaluated for Impairment Specific reserves to total loans individually evaluated for impairment Financing Receivable Individually Evaluated for Impairment Allowance for Credit Losses to Carrying Amount Percentage Represents the valuation allowance for financing receivables that are expected to be uncollectible that were individually evaluated for impairment expressed as a percentage of the balance of financing receivables that were individually evaluated for impairment. Loans collectively evaluated for impairment Financing Receivable, Collectively Evaluated for Impairment General reserves to total loans collectively evaluated for impairment Financing Receivable Collectively Evaluated for Impairment Allowance for Credit Losses to Carrying Amount Percentage Represents the valuation allowance for financing receivables that are expected to be uncollectible that were collectively evaluated for impairment expressed as a percentage of the balance of financing receivables that were collectively evaluated for impairment. Total gross loans Loans Receivable, Gross The aggregate carrying amount of loans receivable that will be sold to other entities, and the aggregate gross carrying amount of all categories of loans and leases held in portfolio, before deducting the allowance for losses on loans and leases. Total allowance to gross loans Loans and Leases Receivable Allowance to Gross Carrying Amount Percentage Represents the allowance to cover probable credit losses on loans and leases expressed as a percentage of balance of loans and leases held in portfolio before allowance. Earnings Per Share Earnings Per Share [Text Block] Parent Company Financial Information Condensed Financial Information of Parent Company Only Disclosure [Text Block] Schedule of assets acquired and liabilities assumed and the provisional fair value adjustments and amounts recorded Schedule of Recognized Identified Assets Acquired and Liabilities Assumed [Table Text Block] Schedule of contractual amounts due, expected cash flows to be collected, interest component and fair value as of the respective acquisition dates Certain Loans Acquired in Transfer Not Accounted for as Debt Securities Acquired During Period [Table Text Block] Summary of pro forma net interest and other income, net income and earnings per share Business Acquisition, Pro Forma Information [Table Text Block] Schedule of amortized cost and estimated fair value of securities Summary Investment Holdings [Table Text Block] Schedule of number, fair value and gross unrealized holding losses of the Company's investment securities by investment category and length of time that the securities have been in a continuous loss position Schedule of Unrealized Loss on Investments [Table Text Block] Schedule of amortized cost and estimated fair value of investment securities available for sale by contractual maturity Investments Classified by Contractual Maturity Date [Table Text Block] Related Party Transactions [Abstract] Related Parties Related Party Transactions Disclosure [Text Block] Schedule of components of deposit accounts and weighted average interest rates Schedule of Deposits [Table Text Block] Tabular disclosure of components of different types of deposit liabilities held by the entity. Schedule of aggregate annual maturities of certificates of deposit accounts Schedule of Time Deposit Contractual Maturities [Table Text Block] Tabular disclosure of time deposits classified with respect to their maturities. Schedule of interest expense on deposit accounts Schedule of Interest Expense Deposits [Table Text Block] Tabular disclosure of interest expense on deposits. Schedule of outstanding subordinated debentures Schedule of Debt [Table Text Block] Schedule of summarizes activities for our subordinated debentures Schedule of Subordinated Borrowing [Table Text Block] Schedule of condensed balance sheets Condensed Balance Sheet [Table Text Block] Schedule of condensed statements of operations Condensed Income Statement [Table Text Block] Schedule of condensed statements of cash flows Condensed Cash Flow Statement [Table Text Block] Acquisitions Business Combination Disclosure [Text Block] Award Type [Axis] Award Type [Axis] Award Type [Domain] Award Type [Domain] Restricted Stock Restricted Stock [Member] Share-based Compensation Arrangement by Share-based Payment Award [Line Items] Shares Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number of Shares [Roll Forward] Unvested at the beginning of the year (in shares) Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number Granted (in shares) Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period Vested (in shares) Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Vested in Period Forfeited (in shares) Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Forfeited in Period Unvested at the end of the year (in shares) Weighted Average Grant-Date Fair Value Per Share Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value [Abstract] Unvested at the beginning of the year (in dollars per share) Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value Granted (in dollars per share) Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period, Weighted Average Grant Date Fair Value Vested (in dollars per share) Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Vested in Period, Weighted Average Grant Date Fair Value Forfeited (in dollars per share) Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Forfeitures, Weighted Average Grant Date Fair Value Unvested at the end of the year (in dollars per share) Compensation expense Share-based Payment Arrangement, Expense Grant date fair value Shares Granted, Value, Share-based Payment Arrangement, after Forfeiture Unrecognized compensation expense Share-based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Amount Weighted-average period of recognition Share-based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Period for Recognition Activities in advances from the FHLB Federal Home Loan Bank, Advances, Activity for Year [Abstract] Average balance outstanding Federal Home Loan Bank, Advances, Activity for Year, Average Balance of Agreements Outstanding Weighted average rate Federal Home Loan Bank, Advances, Weighted Average Interest Rate Maximum amount outstanding at any month-end during the year Federal Home Loan Bank, Advances, Activity for Year, Maximum Outstanding at any Month End Balance outstanding at end of year Advances from Federal Home Loan Banks Weighted average interest rate at year-end Federal Home Loan Bank, Advances, Activity for Year, Average Interest Rate for Year Balance Sheet Offsetting Balance Sheet Offsetting [Text Block] Balance Sheet Offsetting [Text Block] Number of subordinated debt instruments Debt Instrument, Number of Debt Instruments Debt Instrument, Number of Debt Instruments Increase to carrying value of subordinated debt Debt Instrument, Increase to Aggregate Carrying Value of Debt Debt Instrument, Increase to Aggregate Carrying Value of Debt Percentage increase to carrying value of subordinated debt Debt Instrument, Increase to Aggregate Carrying Value of Debt, Percentage Debt Instrument, Increase to Aggregate Carrying Value of Debt, Percentage Debt issued Redemption of aggregated amount Repayments of Subordinated Debt Fixed interest rate (as a percent) Unamortized debt issuance costs Debt Issuance Costs, Gross Floating interest rate, basis points added to base rate (as a percent) Long-term Debt Long-term Debt Effective rate (as a percent) Minority interest purchased (as a percent) Ownership Interest Purchased Percentage Represents the minority interest percentage purchased during the period. Amount of minority interest purchased Ownership Interest Purchased Represents the value of minority interest purchased during the period. Floating Rate Trust Preferred Securities issue amount Payments to Acquire Trust Preferred Investments Purchase accounting fair value adjustments Business Combination, Provisional Information, Initial Accounting Incomplete, Adjustment, Financial Liabilities Debt assumed in acquisition Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Noncurrent Liabilities, Long-term Debt Loss on early debt extinguishment Gain (Loss) on Extinguishment of Debt Number of subordinated notes assumed Number of Subordinated Notes Assumed Number of Subordinated Notes Assumed Redemption price (as a percent) Debt Instrument, Redemption Price, Percentage Redemption price, subsequent reduction (as a percent) Debt Instrument, Redemption Price, Subsequent Reduction, Percentage Debt Instrument, Redemption Price, Subsequent Reduction, Percentage Carrying value of subordinated notes Junior Subordinated Notes Redemption of company capital instruments Tier One Leverage Capital, Reduction for Redemption of Capital Instruments Tier One Leverage Capital, Reduction for Redemption of Capital Instruments Public offering price Public Offering Price, Aggregate Principal Amount, Percentage Public Offering Price, Aggregate Principal Amount, Percentage Statement of Cash Flows [Abstract] Cash flows from operating activities: Net Cash Provided by (Used in) Operating Activities, Continuing Operations [Abstract] Net income Adjustments to net income: Adjustments to Reconcile Net Income (Loss) to Cash Provided by (Used in) Operating Activities [Abstract] Depreciation and amortization expense Depreciation, Depletion and Amortization Provision for credit losses Provision for Loan, Lease, and Other Losses Share-based compensation expense Share-based Payment Arrangement, Noncash Expense (Gain) loss on sale and disposal of premises and equipment Gain (Loss) on Disposition of Property Plant Equipment Gain on sale of or write down of other real estate owned Gains (Losses) on Sales of Other Real Estate Excluding Write Down of Other Real Estate Owned The net gain or loss resulting from sales and other disposals of other real estate owned excluding the write-down of other real estate owned after acquisition or physical possession. Net amortization on securities Investment Income, Net, Amortization of Discount and Premium Net accretion of discounts/premiums for acquired loans and deferred loan fees/costs Accretion (Amortization) of Discounts and Premiums, Investments Gain on sale of investment securities available-for-sale Originations of loans held for sale Payments to Purchase Loans Held-for-sale Proceeds from the sales of and principal payments from loans held for sale Proceeds from Sale and Collection of Loans Held-for-sale Gain on sale of loans Gain (Loss) on Sale of Loans Held For Sale The net gain (loss) resulting from a sale of loans, including adjustments to record loans classified as held-for-sale at the lower-of-cost-or-market. Deferred income tax expense Deferred Income Tax Expense (Benefit) Change in accrued expenses and other liabilities, net Increase (Decrease) in Accounts Payable and Accrued Liabilities Income from bank owned life insurance, net Bank Owned Life Insurance Income (Expense), Net Bank Owned Life Insurance Income (Expense), Net Amortization of core deposit intangible Change in accrued interest receivable and other assets, net Increase (Decrease) in Accrued Interest Receivable Net and Other Assets This element represents the net change during the reporting period in the amount due from borrowers for interest payments. Also includes the net change in other assets not otherwise specified in the taxonomy. Net cash provided by (used) in operating activities Net Cash Provided by (Used in) Operating Activities Cash flows from investing activities: Net Cash Provided by (Used in) Investing Activities, Continuing Operations [Abstract] Net increase in interest-bearing time deposits with financial institutions Proceeds from (Payments for) in Interest-bearing Deposits in Banks Proceeds from sale of other real estate owned Proceeds from Sale of Other Real Estate Loan originations and payments, net Increase (Decrease) in Undisbursed Loan Funds Proceeds from loans held for sale previously classified as portfolio loans Proceeds from Sale of Finance Receivables Purchase of loans held for investment Payments to Acquire Loans Held-for-investment Purchase of held-to-maturity securities Payments to Acquire Held-to-maturity Securities Proceeds from prepayments and maturities of held-to-maturity securities Principal Payments on Held-to-maturity Securities Principal Payments on Held-to-maturity Securities Purchase of securities available-for-sale Payments to Acquire Debt Securities, Available-for-sale Proceeds from prepayments and maturities of securities available-for-sale Payments On Available For Sale Securities Payments On Available For Sale Securities Proceeds from sale or maturity of securities available-for-sale Proceeds from Sale and Maturity of Debt Securities, Available-for-sale Proceeds from the sale of premises and equipment Proceeds from Sale of Property, Plant, and Equipment Proceeds from bank owned insurance death benefit Payments for Investment in Bank Owned Life Insurance Represents the amount of cash outflow for payments for investment made in bank owned life insurance. Purchases of premises and equipment Payments to Acquire Property, Plant, and Equipment Change in FHLB, FRB, and other stock, at cost Payments for (Proceeds from) Federal Home Loan Bank, Federal Reserve Bank, and Other Stock Payments for (Proceeds from) Federal Home Loan Bank, Federal Reserve Bank, and Other Stock Funding of CRA investments Payments to Acquire Investments Cash acquired in acquisitions, net Cash Acquired from Acquisition Net cash used in investing activities Net Cash Provided by (Used in) Investing Activities Cash flows from financing activities: Net Cash Provided by (Used in) Financing Activities, Continuing Operations [Abstract] Net increase in deposit accounts Increase (Decrease) in Deposits Net change in short-term borrowings Proceeds from (Repayments of) Short-term Debt Proceeds from FHLB borrowings Proceeds from FHLBank Borrowings, Financing Activities Repayment of FHLB borrowings Repayments of Federal Home Loan Bank and Other Borrowings This element represents the cash outflow for the payment of loans drawn from the Federal Home Loan Bank. Also includes the repayment of other borrowings not otherwise specified in the taxonomy. Redemption of junior subordinated debt securities Proceeds from issuance of subordinated debt, net Proceeds from Issuance of Subordinated Long-term Debt Cash dividends paid Payments of Ordinary Dividends Repurchase and retirement of common stock Payments for Repurchase of Common Stock Proceeds from exercise of stock options Proceeds from Warrant Exercises Restricted stock surrendered and canceled Restricted Stock Surrendered and Canceled Restricted Stock Surrendered and Canceled Net cash provided by (used in) financing activities Net Cash Provided by (Used in) Financing Activities Net change in cash and cash equivalents Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents, Period Increase (Decrease), Including Exchange Rate Effect Cash and cash equivalents, beginning of year Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents Cash and cash equivalents, end of year Supplemental cash flow disclosures: Supplemental Cash Flow Information [Abstract] Interest paid Interest Paid, Excluding Capitalized Interest, Operating Activities Income taxes paid Income Taxes Paid Noncash investing activities: Cash Flow, Noncash Investing and Financing Activities Disclosure [Abstract] Loans held for sale transfer to loans held for investment Transfer of Loans Held-for-sale to Portfolio Loans Transfers from loans to other real estate owned Loans Transferred To Other Real Estate Owned Loans Transferred To Other Real Estate Owned Recognition of operating lease right-of-use assets Right-of-Use Asset Obtained in Exchange for Operating Lease Liability Recognition of operating lease liabilities Right-of-Use Asset Obtained in Exchange for Finance Lease Liability Assets acquired (liabilities assumed) in acquisitions (See Note 27): Noncash or Part Noncash Acquisition, Net Nonmonetary Assets Acquired (Liabilities Assumed) [Abstract] Investment securities Noncash or Part Noncash Acquisition, Investments Acquired Loans Noncash or Part Noncash Acquisition, Loans Acquired The amount of loans that an Entity acquires in a noncash (or part noncash) acquisition. Noncash is defined as information about all investing and financing activities of an enterprise during a period that affect recognized assets or liabilities but that do not result in cash receipts or cash payments in the period. "Part noncash" refers to that portion of the transaction not resulting in cash receipts or cash payments in the period. Core deposit intangible Noncash or Part Noncash Acquisition, Intangible Assets Acquired Deferred income tax Noncash or Part Noncash Acquisition, Deferred Income Tax Acquired Represents the information pertaining to the amount of deferred income tax that an Entity acquires in a noncash (or part noncash) acquisition. Noncash is defined as information about all investing and financing activities of an enterprise during a period that affect recognized assets or liabilities but that do not result in cash receipts or cash payments in the period. "Part noncash" refers to that portion of the transaction not resulting in cash receipts or cash payments in the period. Goodwill Noncash or Part Noncash Acquisition Goodwill Acquired The amount of goodwill that an entity acquires in a noncash (or part noncash) acquisition. Noncash is defined as information about all investing and financing activities of an enterprise during a period that affect recognized assets or liabilities but that do not result in cash receipts or cash payments in the period. Part noncash refers to that portion of the transaction not resulting in cash receipts or cash payments in the period. Fixed assets Noncash or Part Noncash Acquisition, Fixed Assets Acquired Other assets Noncash or Part Noncash Acquisition, Other Assets Acquired Deposits Noncash or Part Noncash Acquisition, Debt Assumed Other borrowings Noncash or Part Noncash Acquisition Other Borrowings Assumed The amount of other borrowings that an entity assumes in acquiring a business or in consideration for an asset received in a noncash (or part noncash) acquisition. Noncash is defined as transactions during a period that affect recognized assets or liabilities but that do not result in cash receipts or cash payments in the period. Part noncash refers to that portion of the transaction not resulting in cash receipts or cash payments in the period. Other liabilities Noncash or Part Noncash Acquisition, Other Liabilities Assumed Common Stock and additional paid-in capital Noncash or Part Noncash Acquisition Noncash Financial or Equity Instrument Consideration Shares Issued Value The fair value of shares issued as [noncash or part noncash] consideration for a business or asset acquired. Noncash is defined as transactions during a period that affect recognized assets or liabilities but that do not result in cash receipts or cash payments in the period. Part noncash refers to that portion of the transaction not resulting in cash receipts or cash payments in the period. Basic Net Income (Loss) Attributable to Parent [Abstract] Less: Earnings allocated to participating securities Undistributed Earnings (Loss) Allocated to Participating Securities, Basic Weighted average common shares outstanding (in shares) Basic earnings per common share (in dollars per share) Diluted Weighted Average Number of Shares Outstanding Reconciliation [Abstract] Diluted effect of share-based compensation (in shares) Incremental Common Shares Attributable to Dilutive Effect of Share-based Payment Arrangements Weighted average diluted common shares (in shares) Diluted earnings per common share (in dollars per share) Schedule of Antidilutive Securities Excluded from Computation of Earnings Per Share [Table] Schedule of Antidilutive Securities Excluded from Computation of Earnings Per Share [Table] Antidilutive Securities [Axis] Antidilutive Securities [Axis] Antidilutive Securities, Name [Domain] Antidilutive Securities, Name [Domain] Restricted Stock Units RSUs Restricted Stock Units (RSUs) [Member] Stock option Share-based Payment Arrangement, Option [Member] Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items] Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items] Weighted average number of stock options excluded (in shares) Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount Investment Holdings [Table] Investment Holdings [Table] Financial Instrument [Axis] Financial Instrument [Axis] Financial Instruments [Domain] Financial Instruments [Domain] U.S. Treasury US Treasury Securities [Member] Agency Agency Securities [Member] Corporate debt Corporate Debt Securities [Member]