Receivables [Abstract] Schedule of Accounts, Notes, Loans and Financing Receivable [Table] Schedule of Accounts, Notes, Loans and Financing Receivable [Table] Receivable Type [Axis] Receivable Type [Axis] Receivable [Domain] Receivable [Domain] Portfolio Loans Portfolio Loans [Member] PCI Loans Purchased Credit Impaired Loans [Member] PULs Purchased Unimpaired Loans [Member] Financing Receivable Portfolio Segment [Axis] Financing Receivable Portfolio Segment [Axis] Financing Receivable Portfolio Segment [Domain] Financing Receivable Portfolio Segment [Domain] Real Estate Residential Portfolio Segment [Member] Commercial and financial Commercial Portfolio Segment [Member] Consumer Consumer Portfolio Segment [Member] Class of Financing Receivable, Type [Axis] Class of Financing Receivable, Type [Axis] Class of Financing Receivable, Type [Domain] Class of Financing Receivable, Type [Domain] Construction and land development Construction Permits [Member] Commercial real estate Commercial Real Estate [Member] Residential real estate Residential Real Estate [Member] Commercial and financial Commercial and Financial [Member] Consumer Consumer Loan [Member] Internal Credit Assessment [Axis] Internal Credit Assessment [Axis] Internal Credit Assessment [Domain] Internal Credit Assessment [Domain] Accounts, Notes, Loans and Financing Receivable [Line Items] Accounts, Notes, Loans and Financing Receivable [Line Items] Loans and leases receivable Loans and Leases Receivable, Gross Deferred costs Deferred Costs, Noncurrent Accounting Policies [Abstract] Basis of Presentation Basis of Accounting, Policy [Policy Text Block] Reclassification Reclassification, Policy [Policy Text Block] Adoption of New Accounting Pronouncements and Recent Issued Accounting Standards, Not Yet Adopted New Accounting Pronouncements, Policy [Policy Text Block] Use of Estimates Use of Estimates, Policy [Policy Text Block] Schedule of Financing Receivable, Allowance for Credit Losses [Table] Schedule of Financing Receivable, Allowance for Credit Losses [Table] Consumer Finance Leases Portfolio Segment [Member] Financing Receivable, Allowance for Credit Losses [Line Items] Financing Receivable, Allowance for Credit Losses [Line Items] Allowance for Loan and Lease Losses [Roll Forward] Allowance for Loan and Lease Losses [Roll Forward] Beginning Balance Loans and Leases Receivable, Allowance Provision for Loan Losses Provision for Loan, Lease, and Other Losses Charge- Offs Allowance for Loan and Lease Losses, Write-offs Recoveries Allowance for Loan and Lease Loss, Recovery of Bad Debts TDR Allowance Adjustments Allowance for Loan and Lease Losses, Adjustments, Other Ending Balance Business Combinations [Abstract] Net interest income Business Acquisition, Pro Forma Revenue Net income Business Acquisition, Pro Forma Net Income (Loss) EPS - basic (in dollars per share) Business Acquisition, Pro Forma Earnings Per Share, Basic EPS - diluted (in dollars per share) Business Acquisition, Pro Forma Earnings Per Share, Diluted Brokers and Dealers [Abstract] Securities Sold Under Agreements to Repurchase Repurchase Agreements, Resale Agreements, Securities Borrowed, and Securities Loaned Disclosure [Text Block] Schedule of Business Acquisitions, by Acquisition [Table] Schedule of Business Acquisitions, by Acquisition [Table] Business Acquisition [Axis] Business Acquisition [Axis] Business Acquisition, Acquiree [Domain] Business Acquisition, Acquiree [Domain] Gulf Shore Banc shares Inc Gulf Shore Banc shares Inc [Member] NorthStar Bank NorthStar Bank [Member] Palm Beach Community Bank Palm Beach Community Bank [Member] Scenario [Axis] Scenario [Axis] Scenario, Unspecified [Domain] Scenario, Unspecified [Domain] Initially Reported Scenario, Previously Reported [Member] As Adjusted Restatement Adjustment [Member] Period Adjustments [Axis] Period Adjustments [Axis] Period Adjustments [Domain] Period Adjustments [Domain] Measurement Period Adjustments Measurement Period Adjustment [Member] Business Acquisition [Line Items] Business Acquisition [Line Items] Assets: Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Assets [Abstract] Cash 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 Investments Business Combination Recognized Identifiable Assets Acquired And Liabilities Assumed Current Assets Investments. Loans, net Business Combination Recognized Identifiable Assets Acquired And Liabilities Assumed Loan Held For Sale Business Combination Recognized Identifiable Assets Acquired And Liabilities Assumed Loan Held For Sale. Fixed assets Business Combination Recognized Identifiable Assets Acquired And Liabilities Assumed Fixed Assets Business Combination Recognized Identifiable Assets Acquired and Liabilities Assumed Fixed Assets. Other real estate owned Business Combination Recognized Identifiable Assets Acquired And Liabilities Assumed other Real Estate Owned Business Combination Recognized Identifiable Assets Acquired And Liabilities Assumed Bank owned Life insurance. Core deposit intangibles Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Finite-Lived Intangibles Goodwill Goodwill 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: Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Liabilities [Abstract] Deposits Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Liabilities, Accounts Payable 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 Schedule of Financing Receivable, Troubled Debt Restructurings [Table] Schedule of Financing Receivable, Troubled Debt Restructurings [Table] Securities or Other Assets Sold under Agreements to Repurchase [Axis] Securities or Other Assets Sold under Agreements to Repurchase [Axis] Assets Sold under Agreements to Repurchase, Type [Domain] Assets Sold under Agreements to Repurchase, Type [Domain] Loans Loans [Member] Bank Shares, Inc The Bank shares Inc [Member] Financing Receivable, Modifications [Line Items] Financing Receivable, Modifications [Line Items] Remaining fair value adjustment for loans acquired Assets, Fair Value Adjustment Percentage of fair value adjustment for loans acquired Fair value adjustment Percent The percentage of outstanding aggregate loan balances representing the fair value adjustments for loans acquired. First Green Bancorp, Inc. First Green Bancorp, Inc. [Member] First Green Bancorp, Inc. [Member] Subsequent Event Type [Axis] Subsequent Event Type [Axis] Subsequent Event Type [Domain] Subsequent Event Type [Domain] Subsequent Event Subsequent Event [Member] Value of shares exchanged for cash Payments to Acquire Businesses, Gross Number of shares outstanding (in shares) Shares, Outstanding Common stock portion, number of Seacoast stock for each share of stock converted (in shares) Business Acquisition Per Share Exchange Ratio per share exchange ratio. Number of shares of Seacoast common stock issued (in shares) Business Acquisition, Equity Interest Issued or Issuable, Number of Shares Multiplied by common stock price per share (in dollars per share) Business Acquisition, Share Price Value of common stock issued Business Combination, Step Acquisition, Equity Interest in Acquiree, Fair Value Cash paid for NorthStar Banking vested Corporation stock options Other Payments to Acquire Businesses Total purchase price Business Combination, Consideration Transferred Payments for loans in default, number of payments Payments For Loans In Default, Number Of Payments Payments For Loans In Default, Number Of Payments Payments for loans in default Payments On Loans In Default Payments On Loans In Default Troubled debt restructuring outstanding amount Troubled Debt Restructuring Outstanding Troubled debt restructuring outstanding. Average impaired loans Impaired Financing Receivable, Average Recorded Investment Interest income recorded on impaired loans Loans and Leases Receivable, Impaired, Troubled Debt, Interest Income Interest income related to impaired loans with impairment measured on present value of expected future cash flows Loans and Leases Receivable, Impaired, Interest Income Recognized, Change in Present Value Attributable to Passage of Time Earnings Per Share [Abstract] Antidilutive securities excluded from diluted earnings per share calculation (in shares) Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount Schedule of Antidilutive Securities Excluded from Computation of Earnings Per Share [Table] Schedule of Antidilutive Securities Excluded from Computation of Earnings Per Share [Table] Legal Entity [Axis] Legal Entity [Axis] Entity [Domain] Entity [Domain] CapGen Capital Group III LP CapGen Capital Group III LP [Member] Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items] Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items] Shares of common stock issued (in shares) Stock Issued During Period, Shares, New Issues Net proceeds from issuance of common stock Proceeds from Issuance of Common Stock Investments, Debt and Equity Securities [Abstract] Schedule of Available-for-sale Securities [Table] Schedule of Available-for-sale Securities [Table] Underlying Asset Class [Axis] Underlying Asset Class [Axis] Underlying Asset Class [Domain] Underlying Asset Class [Domain] Collateralized loan obligations Collateralized Loan Obligations [Member] Range [Axis] Range [Axis] Range [Domain] Range [Domain] Maximum Maximum [Member] Minimum Minimum [Member] Ownership [Axis] Ownership [Axis] Ownership [Domain] Ownership [Domain] Visa Visa [Member] Visa [Member] Measurement Basis [Axis] Measurement Basis [Axis] Fair Value Measurement [Domain] Fair Value Measurement [Domain] Portion at Fair Value Measurement [Member] Portion at Fair Value Measurement [Member] Carrying Value Reported Value Measurement [Member] Debt Security Category [Axis] Debt Security Category [Axis] Other than Temporary Impairment, Credit Losses Recognized in Earnings, Categories of Investments [Domain] Other than Temporary Impairment, Credit Losses Recognized in Earnings, Categories of Investments [Domain] Available-for-sale Securities Available-for-sale Securities [Member] Class of Stock [Axis] Class of Stock [Axis] Class of Stock [Domain] Class of Stock [Domain] Common Class B Common Class B [Member] Common Class A Common Class A [Member] Financial Instrument [Axis] Financial Instrument [Axis] Financial Instruments [Domain] Financial Instruments [Domain] Public and Trust Deposits Public and Trust Deposits [Member] Repurchase Agreement Repurchase Agreement [Member] Mortgage-backed securities and collateralized mortgage obligations of U.S. Government Sponsored Entities Mortgage-backed Securities, Issued by US Government Sponsored Enterprises [Member] Private collateralized mortgage obligations Mortgage-backed Securities, Issued by Private Enterprises [Member] Seasoned Residential Collateral Of Us Government Sponsored Entities Seasoned Residential Collateral Of Us Government Sponsored Entities [Member] Obligations of state and political subdivisions US States and Political Subdivisions Debt Securities [Member] Cash and Cash Equivalents [Axis] Cash and Cash Equivalents [Axis] Cash and Cash Equivalents [Domain] Cash and Cash Equivalents [Domain] Schedule of Available-for-sale Securities [Line Items] Schedule of Available-for-sale Securities [Line Items] Proceeds from sale of debt securities available for sale Proceeds from Sale of Available-for-sale Securities, Debt Gross gains from sale of securities Available-for-sale Securities, Gross Realized Gains Gross losses from sale of securities Available-for-sale Securities, Gross Realized Losses Gain (loss) in investment in shares of mutual funds Marketable Securities, Gain (Loss) Fair value of debt securities pledged as collateral Security Owned and Pledged as Collateral, Fair Value Unrealized losses from securities transferred from available for sale to held to maturity Available For Sale Securities Transferred To Held To Maturity Securities Unrealized Gain (Loss) This item represents the unrealized gain (loss) recognized in other comprehensive income (a separate component of shareholders' equity) as a result of securities categorized as available-for-sale being transferred to the held-to-maturity securities category. Unamortized balance of securities transferred from available for sale to held to maturity Available-For-Sale Securities, Transferred Security, At Carrying Value Available-For-Sale Securities, Transferred Security, At Carrying Value Fair value for securities in unrealized loss position for less than twelve months Available-for-sale Securities, Continuous Unrealized Loss Position, Less than Twelve Months, Fair Value Unrealized losses on securities in unrealized loss position for less than twelve months Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss Fair value for securities in unrealized loss position for twelve months or more Available-for-sale Securities, Continuous Unrealized Loss Position, Twelve Months or Longer, Fair Value Unrealized losses on securities in unrealized loss position for more than twelve months Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss Unrealized losses on mortgage backed securities of government sponsored entities Available-for-sale Securities, Continuous Unrealized Loss Position, Accumulated Loss Fair value of mortgage backed securities of government sponsored entities Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value Mortgage term Debt Security, Collateral Mortgage Term Debt Security, Collateral Mortgage Term Other assets Federal Home Loan Bank Stock and Federal Reserve Bank Stock Investment in mutual fund carried at fair value Other Assets Shares held (in shares) Common Stock, Shares, Outstanding Conversion rate of Class A stock for each share of Class B stock (shares) Debt Instrument, Convertible, Conversion Price Shares issued (in shares) Stock Issued During Period, Shares, Conversion of Convertible Securities Ownership basis Ownership Basis Ownership Basis Summary of Amortized Cost and Fair Value of Securities Available for Sale Schedule of Available-for-sale Securities Reconciliation [Table Text Block] Summary of Amortized Cost and Fair Value of Held-to-Maturity Securities Held-to-maturity Securities [Table Text Block] Summary of Investments Classified by Contractual Maturity Investments Classified by Contractual Maturity Date [Table Text Block] Schedule of Debt Securities in Unrealized Loss Position Debt Securities, Available-For-Sale, Unrealized Loss Position, Fair Value [Table Text Block] Debt Securities, Available-For-Sale, Unrealized Loss Position, Fair Value [Table Text Block] Document And Entity Information [Abstract] Document Type Document Type Amendment Flag Amendment Flag Document Period End Date Document Period End Date Document Fiscal Year Focus Document Fiscal Year Focus Document Fiscal Period Focus Document Fiscal Period Focus Entity Registrant Name Entity Registrant Name Entity Central Index Key Entity Central Index Key Current Fiscal Year End Date Current Fiscal Year End Date Entity Filer Category Entity Filer Category Trading Symbol Trading Symbol Entity Common Stock, Shares Outstanding Entity Common Stock, Shares Outstanding Fair Value Disclosures [Abstract] Fair Value Measurements, Recurring and Nonrecurring [Table] Fair Value Measurements, Recurring and Nonrecurring [Table] Measurement Frequency [Axis] Measurement Frequency [Axis] Fair Value, Measurement Frequency [Domain] Fair Value, Measurement Frequency [Domain] Fair Value, Measurements, Recurring Fair Value, Measurements, Recurring [Member] Fair Value, Measurements, Nonrecurring Fair Value, Measurements, Nonrecurring [Member] Fair Value, Hierarchy [Axis] Fair Value, Hierarchy [Axis] Fair Value Hierarchy [Domain] Fair Value Hierarchy [Domain] Quoted Prices in Active Markets for Identical Assets (Level 1) Fair Value, Inputs, Level 1 [Member] Significant Other Observable Inputs (Level 2) Fair Value, Inputs, Level 2 [Member] Significant Unobservable Inputs (Level 3) Fair Value, Inputs, Level 3 [Member] Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] Available for sale debt securities Available-for-sale Securities, Debt Securities Loans held for sale Loans Held-for-sale, Fair Value Disclosure Loans Loans Receivable, Fair Value Disclosure Other real estate owned Other Real Estate Equity securities Available-for-sale Securities, Equity Securities Certain Loans Acquired in Transfer Not Accounted for as Debt Securities, Accretable Yield Movement Schedule [Roll Forward] Certain Loans Acquired in Transfer Not Accounted for as Debt Securities, Accretable Yield Movement Schedule [Roll Forward] Beginning balance Certain Loans Acquired in Transfer Not Accounted for as Debt Securities, Accretable Yield Additions Certain Loans Acquired in Transfer Not Accounted for as Debt Securities, Accretable Yield, Additions Deletions Certain Loans Acquired in Transfer Not Accounted for as Debt Securities, Accretable Yield, Period Increase (Decrease) Accretion Certain Loans Acquired in Transfer Not Accounted for as Debt Securities, Accretable Yield, Accretion Reclassification from non-accretable difference Certain Loans Acquired in Transfer Not Accounted for as Debt Securities, Accretable Yield, Reclassifications (to) from Nonaccretable Difference Ending balance Statement of Financial Position [Abstract] ASSETS Assets [Abstract] Cash and due from banks Cash and Due from Banks Interest bearing deposits with other banks Interest-bearing Deposits in Banks and Other Financial Institutions Total cash and cash equivalents Cash and Cash Equivalents, at Carrying Value Time deposits with other banks Time Deposits With Other Banks Time Deposits With Other Banks Debt securities: Marketable Securities [Abstract] Available for sale (at fair value) Held to maturity (fair value: $353,919 at September 30, 2018 and $414,470 at December 31, 2017) Held-to-maturity Securities Total debt securities Investments Loans held for sale (at fair value) Loans Receivable Held-for-sale, Net, Not Part of Disposal Group Loans Less: Allowance for loan losses Loans, net of allowance for loan losses Loans and Leases Receivable, Net Amount Bank premises and equipment, net Property, Plant and Equipment, Net Other real estate owned Other intangible assets, net Intangible Assets, Net (Excluding Goodwill) Bank owned life insurance Bank Owned Life Insurance Net deferred tax assets Deferred Income Tax Assets, Net Other assets Other Assets, Noncurrent TOTAL ASSETS Assets LIABILITIES Liabilities [Abstract] Deposits Deposits Securities sold under agreements to repurchase Federal Funds Purchased and Securities Sold under Agreements to Repurchase Federal Home Loan Bank (FHLB) borrowings Debt and Capital Lease Obligations Subordinated debt Subordinated Debt Other liabilities Other Liabilities, Noncurrent TOTAL LIABILITIES Liabilities SHAREHOLDERS' EQUITY Stockholders' Equity Attributable to Parent [Abstract] Common stock, par value $0.10 per share, authorized 120,000,000 shares, issued 47,402,935 and outstanding 47,269,692 shares at September 30, 2018, and authorized 60,000,000, issued 47,032,259 and outstanding 46,917,735 shares at December 31, 2017 Common Stock, Value, Issued Other shareholders' equity Other Shareholders Equity Other shareholders' equity. TOTAL SHAREHOLDERS' EQUITY Stockholders' Equity Attributable to Parent TOTAL LIABILITIES AND SHAREHOLDERS' EQUITY Liabilities and Equity Schedule of Financing Receivables Past Due [Table] Schedule of Financing Receivables Past Due [Table] Purchased Credit Impaired Loans Purchased Credit Impaired [Member] Financing Receivables, Period Past Due [Axis] Financing Receivables, Period Past Due [Axis] Financing Receivables, Period Past Due [Domain] Financing Receivables, Period Past Due [Domain] Accruing 30-59 Days Past Due Financing Receivables, 30 to 59 Days Past Due [Member] Accruing 60-89 Days Past Due Financing Receivables, 60 to 89 Days Past Due [Member] Accruing Greater Than 90 Days Financing Receivables, Equal to Greater than 90 Days Past Due [Member] Financing Receivable, Recorded Investment, Past Due [Line Items] Financing Receivable, Recorded Investment, Past Due [Line Items] Current Financing Receivable, Recorded Investment, Current Financing receivable, recorded investment, past due Financing Receivable, Recorded Investment, Past Due Nonaccrual Financing Receivable, Recorded Investment, Nonaccrual Status Total Financing Receivables Financing Receivable, Net Recorded Investment Loans and Leases Receivable, Net Amount [Abstract] Individually Evaluated for Impairment Financing Receivable, Individually Evaluated for Impairment Collectively Evaluated for Impairment Financing Receivable, Collectively Evaluated for Impairment Total Loans and Leases Receivable, Net of Deferred Income Associated Allowance Financing Receivable, Allowance for Credit Loss, Additional Information [Abstract] Individually Evaluated for Impairment Financing Receivable, Allowance for Credit Losses, Individually Evaluated for Impairment Collectively Evaluated for Impairment Financing Receivable, Allowance for Credit Losses, Collectively Evaluated for Impairment Total Financing Receivable, Allowance for Credit Losses Securities Investments in Debt and Marketable Equity Securities (and Certain Trading Assets) Disclosure [Text Block] Schedule of Financing Receivable, Recorded Investment, Credit Quality Indicator [Table] Schedule of Financing Receivable, Recorded Investment, Credit Quality Indicator [Table] Pass Pass [Member] Special Mention Special Mention [Member] Substandard Substandard [Member] Doubtful Doubtful [Member] Financing Receivable, Recorded Investment [Line Items] Financing Receivable, Recorded Investment [Line Items] Loans Summary of Noninterest Income and Expense Non Interest Income And Expense [Table Text Block] Tabular disclosure for noninterest income and expense. Schedule of Fair Value of Assets Measured on Recurring and Nonrecurring Basis Fair Value, Assets Measured on Recurring and Nonrecurring Basis [Table Text Block] Schedule of Aggregate Fair Value and Contractual Balance of Loans for Sale Schedule of contractual balance and gains or losses aggregate fair value [Table Text Block] Tabular disclosure of contractual balance and gains or losses (including accrued interest). Schedule of Carrying Amount and Fair Value of Other Significant Financial Instruments Not Measured on a Recurring Basis Fair Value Measurements, Recurring and Nonrecurring [Table Text Block] Other Real Estate Owned Other Real Estate Owned [Member] Average capitalization rate Capitalization Rates Utilized To Determine Fair Value Of Underlying Collateral Averaged Percentage Represents capitalization rates utilized to determine fair value of the underlying collateral averaged percentage. Fair value of impaired loans Specific reserve for impaired loans Additions Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Purchases Paydowns and chargeoffs Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Settlements Additions to level 3 from foreclosed loans Other Real Estate, Additions Increase to level 3 from migrated branches taken out of service Other Real Estate, Improvements Reductions related to sale of loans Other Real Estate, Disposals Financial Assets Assets, Fair Value Disclosure [Abstract] Debt securities held to maturity Time deposits with other banks Deposits with Other Federal Home Loan Banks Loans, net Financial Liabilities Liabilities, Fair Value Disclosure [Abstract] Deposit liabilities Deposits, Fair Value Disclosure Federal Home Loan Bank (FHLB) borrowings Federal Home Loan Bank Borrowings, Fair Value Disclosure Subordinated debt Subordinated Debt Obligations, Fair Value Disclosure Short-term Debt, Type [Axis] Short-term Debt, Type [Axis] Short-term Debt, Type [Domain] Short-term Debt, Type [Domain] Single family residential real estate Single Family Residential Real Estate [Member] Construction/development/land Construction Development Land [Member] Consumer and other loans Consumer And Other Loans [Member] Purchased credit-impaired Commercial loans Commercial Loan [Member] Book Balance Certain Loans Acquired in Transfer Not Accounted for as Debt Securities, Carrying Amount, Net Fair Value Certain Loans Acquired in Transfer Not Accounted for as Debt Securities, Acquired During Period, at Acquisition, at Fair Value Aggregate fair value Contractual balance Loans Held For Sale Accrued Interest Amount of accrued but unpaid interest on loans. Excess Gain (Loss) on Sales of Loans, Net Schedule of Securities Sold Under Agreements to Repurchase and Securities Pledged Schedule of Securities Financing Transactions [Table Text Block] Recently Issued Accounting Standards, Not Yet Adopted New Accounting Pronouncements and Changes in Accounting Principles [Text Block] Income Statement [Abstract] Interest and fees on loans Interest and Fee Income, Loans and Leases Interest and dividends on securities Interest and Dividend Income, Securities, Operating Interest on interest bearing deposits and other investments Interest On Federal Funds Sold And Interest Bearing Deposits Interest on federal funds sold and interest bearing deposits. TOTAL INTEREST INCOME Interest and Dividend Income, Operating Interest on deposits Interest Expense, Savings Deposits Interest on time certificates Interest Expense, Time Deposits Interest on borrowed money Interest Expense, Short-term Borrowings TOTAL INTEREST EXPENSE Interest Expense NET INTEREST INCOME Interest Income (Expense), Net Provision for loan losses NET INTEREST INCOME AFTER PROVISION FOR LOAN LOSSES Interest Income (Expense), after Provision for Loan Loss Noninterest income Noninterest Income [Abstract] Other income Non Interest Income Excluding Gain Loss On Loans Sale And Investments Non interest income excluding gain loss on loans sale and investments. Securities losses, net Gain (Loss) on Investments TOTAL NONINTEREST INCOME (Note H) Noninterest Income TOTAL NONINTEREST EXPENSES (Note H) Noninterest Expense INCOME BEFORE INCOME TAXES Income (Loss) from Continuing Operations before Equity Method Investments, Income Taxes, Noncontrolling Interest Provision for income taxes Income Tax Expense (Benefit) NET INCOME Net Income (Loss) Attributable to Parent SHARE DATA Net income per share - diluted (in dollars per share) Earnings Per Share, Diluted Net income per share - basic (in dollars per share) Earnings Per Share, Basic Cash dividends declared (in dollars per share) Common Stock, Dividends, Per Share, Declared Average shares outstanding - diluted (in shares) Weighted Average Number of Shares Outstanding, Diluted Average shares outstanding - basic (in shares) Weighted Average Number of Shares Outstanding, Basic Statement of Cash Flows [Abstract] CASH FLOWS FROM OPERATING ACTIVITIES Net Cash Provided by (Used in) Operating Activities [Abstract] Net income Adjustments to reconcile net income to net cash provided by operating activities: Adjustments, Noncash Items, to Reconcile Net Income (Loss) to Cash Provided by (Used in) Operating Activities [Abstract] Depreciation Depreciation Amortization of premiums and discounts on securities, net Accretion (Amortization) of Discounts and Premiums, Investments Other amortization and accretion, net Other Accretion (Amortization), Net Other Accretion (Amortization), Net Stock based compensation Share-based Compensation Origination of loans designated for sale Payments for Origination of Mortgage Loans Held-for-sale Sale of loans designated for sale Sale Of Loans Designated Held For Sale Sale of loans designated held for sale. Provision for loan losses Deferred income taxes Deferred Income Tax Expense (Benefit) Losses on sale of securities Marketable Securities, Realized Gain (Loss), Excluding Other than Temporary Impairments Gains on sale of loans Gain (Loss) on Sales of Consumer Loans Gains on sale and write-downs of other real estate owned Gains (Losses) on Sales of Other Real Estate Losses on disposition of fixed assets Gain (Loss) on Disposition of Property Plant Equipment, Excluding Oil and Gas Property and Timber Property Changes in operating assets and liabilities, net of effects from acquired companies: Increase (Decrease) in Other Operating Assets and Liabilities, Net [Abstract] Net decrease (increase) in other assets Increase (Decrease) in Other Operating Assets Net increase (decrease) in other liabilities Increase (Decrease) in Other Operating Liabilities Net cash provided by operating activities Net Cash Provided by (Used in) Operating Activities CASH FLOWS FROM INVESTING ACTIVITIES Net Cash Provided by (Used in) Investing Activities [Abstract] Maturities and repayments of debt securities available for sale Proceeds from Sale and Maturity of Available-for-sale Securities Maturities and repayments of debt securities held to maturity Proceeds from Sale and Maturity of Held-to-maturity Securities Purchases of debt securities available for sale Payments to Acquire Available-for-sale Securities, Debt Purchases of debt securities held to maturity Payments to Acquire Held-to-maturity Securities Maturities of time deposits with other banks Increase (Decrease) in Time Deposits Net new loans and principal repayments Payments for (Proceeds from) Loans and Leases Purchase of loans held for investment Payments to Acquire Loans Held-for-investment Proceeds from the sale of portfolio loans Proceeds from Sale of Loans Held-for-investment Proceeds from the sale of other real estate owned Proceeds from Sale of Foreclosed Assets Proceeds from sale of FHLB and Federal Reserve Bank Stock Proceeds from Sale of Federal Reserve Bank Stock Purchase of FHLB and Federal Reserve Bank Stock Payments to Acquire Federal Reserve Bank Stock Purchase of VISA Class B stock Payments to Acquire Marketable Securities Redemption of bank owned life insurance Proceeds from Life Insurance Policy Purchase of bank owned life insurance Payment to Acquire Life Insurance Policy, Investing Activities Net cash from bank acquisition Net Cash From Acquition Net of Paid For Prefrred Stock The net cash flow associated with the acquisition of business during the period and paid for preferred stock. Additions to bank premises and equipment Additions To Bank Premises And Equipment Additions to bank premises and equipment. 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 [Abstract] Net increase in deposits Increase (Decrease) in Deposits Net decrease in federal funds purchased and repurchase agreements Increase (Decrease) in Federal Funds Purchased and Securities Sold under Agreements to Repurchase, Net Net increase (decrease) in FHLB borrowings Increase (Decrease) in Loans from Federal Home Loan Banks Issuance of common stock, net of related expense Stock based employee benefit plans Proceeds from Stock Plans Dividends paid Payments of Ordinary Dividends, Preferred Stock and Preference Stock Net cash provided by financing activities Net Cash Provided by (Used in) Financing Activities Net increase (decrease) in cash and cash equivalents Cash and Cash Equivalents, Period Increase (Decrease) Cash and cash equivalents at beginning of period Cash and cash equivalents at end of period Supplemental disclosure of non cash investing activities: Cash Flow, Noncash Investing and Financing Activities Disclosure [Abstract] Transfers from loans to other real estate owned Transfer From Loans To Other Real Estate Owned Transfer from loans to other real estate owned. Transfers from bank premises to other real estate owned Transfers From Bank Premises To Other Real Estate Owned The amount of transfers from bank premises to other real estate owned. Transfers from loans held for investment to loans held for sale Transfer of Portfolio Loans and Leases to Held-for-sale Reclassification of accumulated unrealized loss Reclassification of accumulated unrealized loss The amount of Reclassification of accumulated unrealized loss Basis of Presentation Organization, Consolidation and Presentation of Financial Statements Disclosure and Significant Accounting Policies [Text Block] Business Combinations Business Combination Disclosure [Text Block] Allowance for Loan Losses Allowance for Credit Losses [Text Block] Equity [Abstract] Regulatory threshold for well-capitalized institutions Tier One Risk Based Capital Required to be Well Capitalized to Risk Weighted Assets Schedule of Allowance for Loan Losses Allowance for Credit Losses on Financing Receivables [Table Text Block] Schedule of Loan Portfolio, Excluding PCI Loans and Related Allowance Loan Portfolio And Related Allowance [Table Text Block] Tabular disclosure for loan portfolio and related allowance. Contractually required principal and interest Certain Loans Acquired in Transfer Not Accounted for as Debt Securities, Outstanding Balance Non-accretable difference Certain Loans Acquired in Transfer, Nonaccretable Difference Cash flows expected to be collected Certain Loans Acquired in Transfer Not Accounted for as Debt Securities, Acquired During Period, Cash Flows Expected to be Collected at Acquisition Accretable yield Certain Loans Acquired in Transfer, Accretable Yield Total purchased credit-impaired loan acquired Statement of Comprehensive Income [Abstract] NET INCOME Other comprehensive income (loss): Other Comprehensive Income (Loss), Net of Tax [Abstract] Unrealized (losses) gains on securities available for sale Other Comprehensive Income (Loss), Unrealized Holding Gain (Loss) on Securities Arising During Period, before Tax Amortization of unrealized losses on securities transferred to held to maturity, net Other Comprehensive Income (Loss), Unrealized Holding Gain (Loss) on Securities Arising During Period, Net of Tax Reclassification adjustment for gains included in net income Other Comprehensive Income (Loss), Reclassification Adjustment from AOCI for Sale of Securities, before Tax Income tax effect on other comprehensive (loss) income Other Comprehensive Income (Loss), Tax Total other comprehensive (loss) income Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Parent COMPREHENSIVE INCOME Comprehensive Income (Loss), Net of Tax, Attributable to Parent Earnings per Share Earnings Per Share [Text Block] Defined Benefit Plan, Asset Categories [Axis] Defined Benefit Plan, Asset Categories [Axis] Plan Asset Categories [Domain] Plan Asset Categories [Domain] U.S. Treasury securities and obligations of U.S. Government Entities US Treasury and Government [Member] Fair Value Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value [Abstract] Less than 12 months 12 months or longer Total Unrealized Losses Available-for-sale Securities, Continuous Unrealized Loss Position, Aggregate Loss [Abstract] Less than 12 months 12 months or longer Total Commitments and Contingencies Disclosure [Abstract] Contingencies Commitments and Contingencies Disclosure [Text Block] Schedule of Earnings Per Share, Basic and Diluted Schedule of Earnings Per Share, Basic and Diluted [Table Text Block] Recorded Investment Impaired Financing Receivable, Recorded Investment [Abstract] Impaired Loans with No Related Allowance Recorded Impaired Financing Receivable, with No Related Allowance, Recorded Investment Impaired Loans with an Allowance Recorded Impaired Financing Receivable, with Related Allowance, Recorded Investment Total Impaired Financing Receivable, Recorded Investment Unpaid Principal Balance Impaired Financing Receivable, Unpaid Principal Balance [Abstract] Impaired Loans with No Related Allowance Recorded Impaired Financing Receivable, with No Related Allowance, Unpaid Principal Balance Impaired Loans with an Allowance Recorded Impaired Financing Receivable, with Related Allowance, Unpaid Principal Balance Total Impaired Financing Receivable, Unpaid Principal Balance Related Valuation Allowance Impaired Financing Receivable, Related Allowance Private mortgage-backed securities and collateralized mortgage obligations Privately Issued Mortgage Backed Securities [Member] Debt securities available for sale Available-for-sale Securities, Fair Value to Amortized Cost Basis [Abstract] Available for sale, amortized cost, total Available-for-sale Debt Securities, Amortized Cost Basis Available for sale, gross unrealized gains Available-for-sale Debt Securities, Accumulated Gross Unrealized Gain, before Tax Available for sale, gross unrealized losses Available-for-sale Debt Securities, Accumulated Gross Unrealized Loss, before Tax Available for sale, fair value Debt securities held to maturity Held-to-maturity Securities [Abstract] Held to maturity, amortized cost, total Held-to-maturity Securities, Amortized Cost before Other than Temporary Impairment Held to maturity, gross unrealized gains Held-to-maturity Securities, Accumulated Unrecognized Holding Gain Held to maturity, gross unrealized losses Held-to-maturity Securities, Accumulated Unrecognized Holding Loss Held to maturity, fair value Held-to-maturity Securities, Fair Value Schedule of Recently Issued Accounting Standards, Not Yet Adopted Schedule of New Accounting Pronouncements and Changes in Accounting Principles [Table Text Block] Held to maturity, fair value Common stock, par value (in dollars per share) Common Stock, Par or Stated Value Per Share Common stock, shares authorized (in shares) Common Stock, Shares Authorized Common stock, shares issued (in shares) Common Stock, Shares, Issued Common stock, shares outstanding (in shares) Equity Capital Stockholders' Equity Note Disclosure [Text Block] Noninterest Income and Expense Non Interest Income [Text Block] The entire disclosure for noninterest income and expense. Number of branches acquired Business Acquisition, Number Of Branches Business Acquisition, Number Of Branches Other assets acquired Loans acquired Business Combination Recognized Identifiable Assets Acquired and Liabilities Assumed Noncurrent Assets Loans Amount of loans due after one year or the normal operating cycle, if longer, assumed at the acquisition date. Deposits acquired Business Combination Recognized Identifiable Assets Acquired And Liabilities Assumed Noncurrent Liabilities Deposits Amount of deposits due after one year or the normal operating cycle, if longer, assumed at the acquisition date. Percentage of common stock acquired Business Acquisition, Percentage of Voting Interests Acquired Cash portion, cash per share for common stock converted (in dollars per share) Business Combination, Consideration Transferred, Cash Paid Per Acquiree Share Business Combination, Consideration Transferred, Cash Paid Per Acquiree Share Goodwill recognized from acquisition, nondeductible Effective Income Tax Rate Reconciliation, Nondeductible Expense, Other, Amount Number of branches operated Number Of Branches Number Of Branches Schedule of Finite-Lived Intangible Assets [Table] Schedule of Finite-Lived Intangible Assets [Table] 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] Finite-Lived Intangible Assets [Line Items] Finite-Lived Intangible Assets [Line Items] Number of Contracts Financing Receivable, Modifications, Number of Contracts Pre- Modification Outstanding Recorded Investment Financing Receivable, Modifications, Pre-Modification Recorded Investment Post- Modification Outstanding Recorded Investment Financing Receivable, Modifications, Post-Modification Recorded Investment Specific Reserve Recorded Financing Receivable Modified Specific Reserve Recorded Trouble Debt Restructuring Financing receivable modified specific reserve recorded trouble debt restructuring. Valuation Allowance Recorded FinancingReceivableModifiedValuationAllowanceRecordedTroubleDebtRestructuring Financing receivable modified valuation allowance recorded trouble debt restructuring. Noninterest income Service charges on deposit accounts Fees and Commissions, Depositor Accounts Trust fees Fees and Commissions, Fiduciary and Trust Activities Mortgage banking fees Fees and Commissions, Mortgage Banking Brokerage commissions and fees Brokerage Commissions Revenue Marine finance fees Marine Services Revenue Interchange income Interchange Income Interchange income. BOLI income Bank Owned Life Insurance Income Other income Noninterest income others It Represent Non interest income other for the during Period. Noninterest income, gross Securities losses, net Noninterest expense Noninterest Expense [Abstract] Salaries and wages Compensation Employee benefits Other Labor-related Expenses Outsourced data processing costs Information Technology and Data Processing Telephone/data lines Communication Occupancy Occupancy, Net Furniture and equipment Furniture And Equipment Expense Furniture and equipment expense. Marketing Marketing Expense Legal and professional fees Professional Fees FDIC assessments Federal Deposit Insurance Corporation Assessment Federal deposit insurance corporation assessment. Amortization of intangibles Amortization of Intangible Assets Net (gain)/loss and disposition expense on other real estate owned Gains (Losses) on Sales of Investment Real Estate Other Other Noninterest Expense Total Loans Loans, Notes, Trade and Other Receivables Disclosure [Text Block] Securities Financing Transaction [Table] Securities Financing Transaction [Table] Customer Securities for which Entity has Right to Sell or Repledge [Axis] Customer Securities for which Entity has Right to Sell or Repledge [Axis] Customer Securities for which Entity has Right to Sell or Repledge, Securities Type [Domain] Customer Securities for which Entity has Right to Sell or Repledge, Securities Type [Domain] Securities Financing Transaction [Line Items] Securities Financing Transaction [Line Items] Mortgage backed securities and collateralized mortgage obligations of U.S. Government Sponsored Entities Securities Sold under Agreements to Repurchase, Fair Value of Collateral Fair Value Fair Value Disclosures [Text Block] Summary of Purchase Price Calculation Schedule of summarizing the purchase price calculation [Table Text Block] Tabular disclosure of summarizing the purchase price calculation. Schedule of Business Acquisitions Schedule of Business Acquisitions, by Acquisition [Table Text Block] Schedule of Fair Value of Acquired Loans and Unpaid Principal Balance Fair Value, Assets Measured on Recurring Basis [Table Text Block] Schedule of Contractually Required Principal and Interest Payments Adjusted for Estimated Prepayments Schedule Of Contractually Required Principal And Interest Payments [Table Text Block] Tabular disclosure of the amount recognized as of the acquisition date for the assets, including goodwill, in excess of (less than) the aggregate liabilities assumed, less the noncontrolling interest in the acquire. Summary of Pro-Forma Data including Acquisition of Gulfshore, NSBC and PBCB Business Acquisition, Pro Forma Information [Table Text Block] Schedule of Portfolio Loans, Purchased Credit Impaired Loans and Purchased Unimpaired Loans Schedule of Accounts, Notes, Loans and Financing Receivable [Table Text Block] Schedule of Past Due Financing Receivables Past Due Financing Receivables [Table Text Block] Schedule of Risk Categories of Loans by Class of Loans Financing Receivable Credit Quality Indicators [Table Text Block] Summary of Changes in Accretable Yield on PCI Loans Contractually Required Principal And Interest Cash Payments Changes [Table Text Block] Tabular disclosure of the components of contractual total changes in contractually required principal and interest cash payments. Schedule of Loans Modified Troubled Debt Restructurings on Financing Receivables [Table Text Block] Schedule of Impaired Financing Receivables, Excluding PCI Loans and Valuation Allowances Impaired Financing Receivables [Table Text Block] Basic earnings per share Earnings Per Share, Basic [Abstract] Net income Net Income (Loss) Available to Common Stockholders, Basic Average common stock outstanding (in shares) Net income per share (in dollars per share) Diluted earnings per share Earnings Per Share, Diluted [Abstract] Net income Net Income (Loss) Available to Common Stockholders, Diluted Add: Dilutive effect of employee restricted stock and stock options (in shares) Incremental Common Shares Attributable to Dilutive Effect of Share-based Payment Arrangements Average shares outstanding - diluted (in shares) Net income per share (in dollars per share) Schedule of Held-to-maturity Securities [Table] Schedule of Held-to-maturity Securities [Table] Private mortgage backed securities Schedule of Held-to-maturity Securities [Line Items] Schedule of Held-to-maturity Securities [Line Items] Held-to-maturity Securities, Debt Maturities [Abstract] Held-to-maturity Securities, Debt Maturities [Abstract] Held-to-maturity Securities, Debt Maturities, Net Carrying Amount [Abstract] Held-to-maturity Securities, Debt Maturities, Net Carrying Amount [Abstract] Held to maturity, amortized cost, due in less than one year Held-to-maturity Securities, Debt Maturities, within One Year, Net Carrying Amount Held to maturity, amortized cost, due after one year through five years Held-to-maturity Securities, Debt Maturities, after One Through Five Years, Net Carrying Amount Held to maturity, amortized cost, due after five years through ten years Held-to-maturity Securities, Debt Maturities, after Five Through Ten Years, Net Carrying Amount Held to maturity, amortized cost, due after ten years Held-to-maturity Securities, Debt Maturities, after Ten Years, Net Carrying Amount Held to maturity, amortized cost, total Held-to-maturity Securities, Debt Maturities, Fair Value, Fiscal Year Maturity [Abstract] Held-to-maturity Securities, Debt Maturities, Fair Value, Fiscal Year Maturity [Abstract] Held to maturity, fair value, due in less than one year Held-to-maturity Securities, Debt Maturities, Next Twelve Months, Fair Value Held to maturity, fair value, due after one year through five years Held-to-maturity Securities, Debt Maturities, Year Two Through Five, Fair Value Held to maturity, fair value, due after five years through ten years Held-to-maturity Securities, Debt Maturities, Year Six Through Ten, Fair Value Held to maturity, fair value, due after ten years Held-to-maturity Securities, Debt Maturities, after Ten Years, Fair Value Held to maturity, fair value, total Available-for-sale Securities, Debt Maturities [Abstract] Available-for-sale Securities, Debt Maturities [Abstract] Available-for-sale Securities, Debt Maturities, Amortized Cost Basis, Fiscal Year Maturity [Abstract] Available-for-sale Securities, Debt Maturities, Amortized Cost Basis, Fiscal Year Maturity [Abstract] Available for sale, amortized cost, due in less than one year Available-for-sale Securities, Debt Maturities, Next Twelve Months, Amortized Cost Basis Available for sale, amortized cost, due after one year through five years Available-for-sale Securities, Debt Maturities, Year Two Through Five, Amortized Cost Basis Available for sale, amortized cost, due after five years through ten years Available-for-sale Securities, Debt Maturities, Year Six Through Ten, Amortized Cost Basis Available for sale, amortized cost, due after ten years Available-for-sale Securities, Debt Maturities, Rolling after Year Ten, Amortized Cost Basis Available-for-sale Securities, Debt Maturities, Fair Value, Fiscal Year Maturity [Abstract] Available-for-sale Securities, Debt Maturities, Fair Value, Fiscal Year Maturity [Abstract] Available for sale, fair value, due in less than one year Available-for-sale Securities, Debt Maturities, Next Twelve Months, Fair Value Available for sale, fair value, due after one year through five years Available-for-sale Securities, Debt Maturities, Year Two Through Five, Fair Value Available for sale, fair value, due after five years through ten years Available-for-sale Securities, Debt Maturities, Year Six Through Ten, Fair Value Available for sale, fair value, due after ten years Available-for-sale Securities, Debt Maturities, after Ten Years, Fair Value Available for sale, fair value, total