Accumulated Other Comprehensive Income (Loss), Net of Tax Accumulated other comprehensive income (loss) Additional Paid in Capital, Common Stock Additional paid-in capital Consolidated Statements of Financial Condition Capital Leases, Net Investment in Direct Financing Leases Direct financing leases Capital Leases, Net Investment in Sales Type Leases Sales-type leases Cash and Due from Banks Cash and due from banks Cash and due from banks at beginning of period Cash and due from banks at end of period Interest Paid, Net Interest on deposits and borrowings Increase (Decrease) in Financial Instruments Used in Operating Activities Impairment of other investments Proceeds from (Repayments of) Short-term Debt Net (decrease) increase in short-term borrowings Loans and Leases Receivable, Gross, Commercial [Abstract] Loans: Commercial: Common Stock, Shares Authorized Common stock, shares authorized Common Stock, Value, Issued Common stock, par value $.01 per share, 280,000,000 shares authorized; 160,007,417 and 142,965,012 shares issued Comprehensive Income (Loss), Net of Tax, Attributable to Parent Comprehensive income Comprehensive Income (Loss) Note [Text Block] Comprehensive Income Debt and Capital Lease Obligations Total borrowings Debt Instrument, Interest Rate at Period End Weighted-Average interest rate on long term debt (as a percent) Debt Instrument [Axis] Debt Instrument [Line Items] Debt Instrument Schedule of Long-term Debt Instruments [Table] Defined Benefit Plans and Other Postretirement Benefit Plans [Domain] Deposits [Abstract] Deposits: Demand Deposit Accounts Checking Deposits, Money Market Deposits Money market Deposits, Savings Deposits Savings Deposits Total deposits Checking, savings and money market deposits Depreciation, Amortization and Accretion, Net Depreciation, Depletion and Amortization, Nonproduction Depreciation and amortization Derivative Instruments and Hedging Activities Disclosure [Text Block] Foreign Exchange Contracts Earnings Per Share, Diluted Diluted (in dollars per share) Diluted earnings per share (in dollars per share) Purchases of equipment for lease financing Payments to Acquire Equipment on Lease Federal Home Loan Bank Stock Subtotal Gain (Loss) on Disposition of Assets Gains on sales of assets, net Gain (Loss) on Sale of Property Plant Equipment Other than Temporary Impairment Losses, Investments Impairment charge on other securities available for sale Impairment charge on other investments Consolidated Statements of Income Net Income (Loss) Attributable to Noncontrolling Interest, Joint Venture Partners Net income attributable to non-controlling interest Income attributable to non-controlling interest Income Taxes Paid, Net Income taxes (refunded) paid, net Incremental Common Shares Attributable to Share-based Payment Arrangements Stock options (in shares) Interest Expense [Abstract] Interest expense: Interest Expense Total interest expense Interest and Dividend Income, Securities, Available-for-sale Securities available for sale Interest Income (Expense), after Provision for Loan Loss Net interest income after provision for credit losses Other Interest and Dividend Income Investments and other Investments in Debt and Marketable Equity Securities (and Certain Trading Assets) Disclosure [Text Block] Securities Available for Sale Junior subordinated notes (trust preferred) Labor and Related Expense Compensation and employee benefits Leverage Ratios [Abstract] Tier 1 Leverage Capital Ratios Liabilities and Equity [Abstract] Liabilities and Equity Liabilities and Equity Total liabilities and equity Liabilities Total liabilities Interest and Fee Income, Loans and Leases Loans and leases Loans Receivable, Gross, Commercial, Real Estate [Abstract] Commercial real estate: Loans and Leases Receivable, Gross, Consumer, Real Estate [Abstract] Consumer real estate: Loans and Leases Receivable, Net of Deferred Income Total loans and leases Total Available-for-sale Securities Securities available for sale Fair Value Total Noncontrolling Interest, Increase from Equity Issuance or Sale of Parent Equity Interest Net investment by (distribution to) non-controlling interest Stockholders' Equity Attributable to Noncontrolling Interest Non-controlling interest in subsidiaries Mortgage-backed securities: Increase (Decrease) in Deposits Net increase (decrease) in deposits Increase (Decrease) in Federal Funds Sold Net decrease of federal funds sold net decrease of federal funds sold Payments for (Proceeds from) Loans and Leases Principal collected on loans and leases, net of loan originations and purchases Net Income (Loss) Available to Common Stockholders, Basic Net income available to common stockholders Net income Net Income (Loss) Attributable to Parent Net income Net income (loss) Interest Income (Expense), Net Net interest income Net interest income (expense) Proceeds from Loan and Lease Originations and Principal Collections Loans and Leases Receivable, Allowance Allowance for loan and lease losses Allowance for loan losses Allowance for loan losses Balance, at the beginning of the period Balance, at the end of the period Total Allowance for loan losses Loans and Leases Receivable, Net Reported Amount [Abstract] Loans and leases: FDIC insurance Federal Deposit Insurance Corporation Premium Expense Occupancy, Net Occupancy and equipment Other Noninterest Expense Other Total other expense Postage Expense Postage and courier Supplies Expense Office supplies Noninterest Income [Abstract] Non-interest income: Fees and Commissions, Credit Cards Fees and Commissions Subtotal Servicing Fees, Net Fees and other revenue Fees and other revenue Noninterest Income, Other Operating Income Other Fees and Commissions, Depositor Accounts Fees and service charges Noninterest Income Total non-interest income Non-interest income Foreclosed Real Estate Expense Marketing and Advertising Expense Advertising and marketing Professional Fees Professional fees Other Nonrecurring Expense FDIC special assessment Interest and Dividend Income, Operating [Abstract] Interest income: Interest and Dividend Income, Operating Total interest income Interest income Operating Leases, Income Statement, Depreciation Expense on Property Subject to or Held-for-lease Operating lease depreciation Organization, Consolidation and Presentation of Financial Statements Disclosure [Text Block] Basis of Presentation Other Assets Other assets Increase (Decrease) in Other Operating Assets and Liabilities, Net Net increase in other assets and accrued expenses and other liabilities Other Comprehensive Income (Loss), Pension and Other Postretirement Benefit Plans, Adjustment, before Tax Recognized pension and postretirement actuarial losses, settlement expense, prior service cost and transition obligation Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Adjustment, before Tax Foreign currency translation adjustment Other Comprehensive Income (Loss), Net of Tax [Abstract] Other comprehensive income (losses): Other Comprehensive Income (Loss), Net of Tax Other comprehensive income Total other comprehensive income (loss) Other Comprehensive Income (Loss), Reclassification Adjustment for Sale of Securities Included in Net Income, before Tax Reclassification adjustment for securities gains included in net income Other Comprehensive Income (Loss), Tax Income tax (expense) benefit Other Comprehensive Income (Loss), Unrealized Holding Gain (Loss) on Securities Arising During Period, before Tax Unrealized gains arising during the period on securities available for sale Loans and Leases Receivable, Gross, Consumer, Other Other Payments for (Proceeds from) Other Investing Activities Other, net Proceeds from (Payments for) Other Financing Activities Other, net Postretirement Plan Payments of Dividends, Common Stock Dividends paid on common stock Payments of Dividends, Preferred Stock and Preference Stock Dividends paid on preferred stock Pension and Other Postretirement Benefits Disclosure [Text Block] Employee Benefit Plans Pension Plan Defined Benefit Plan, Actuarial Net (Gains) Losses Recognized actuarial loss Defined Benefit Plan, Amortization of Prior Service Cost (Credit) Amortization of prior service cost Defined Benefit Plan, Amortization of Transition Obligations (Assets) Amortization of transition obligation Defined Benefit Plan, Contributions by Employer Contributions by employer Defined Benefit Plan, Expected Return on Plan Assets Expected return on plan assets Defined Benefit Plan, Interest Cost Interest cost Defined Benefit Plan, Net Periodic Benefit Cost Net periodic benefit cost Defined Benefit Plan, Service Cost Service cost Defined Benefit Plans and Other Postretirement Benefit Plans Disclosures [Axis] Defined Benefit Plan Disclosure [Line Items] Defined Benefit Plan Disclosure Schedule of Defined Benefit Plans Disclosures [Table] Preferred Stock, Shares Authorized Preferred stock, shares authorized Preferred Stock, Shares Issued Preferred stock, shares issued Other Preferred Stock Dividends and Adjustments Non-cash deemed preferred stock dividend Proceeds from Principal Repayments on Loans and Leases Held-for-investment Principal collected on loans and leases, net of loan originations and purchases Proceeds from Sale and Maturity of Available-for-sale Securities Proceeds from Issuance of Common Stock Net proceeds from public offering of common stock Proceeds from Sale of Treasury Stock Treasury shares sold to TCF employee benefit plans Proceeds from Issuance of Long-term Debt Proceeds from long-term borrowings Proceeds from Maturities, Prepayments and Calls of Available-for-sale Securities Proceeds from maturities of and principal collected on securities available for sale Net (distribution to) investment by non-controlling interest Proceeds from (Payments to) Noncontrolling Interests Proceeds from Sale of Available-for-sale Securities Proceeds from sales of securities available for sale Proceeds from Sale of Property, Plant, and Equipment Proceeds from sales of premises and equipment Proceeds from Sale of Foreclosed Assets Proceeds from sales of real estate owned Proceeds from Sale of Loans and Leases Held-for-investment Proceeds from sales of loans and leases Proceeds from Sale of Wholly Owned Real Estate and Real Estate Acquired in Settlement of Loans Property, Plant and Equipment, Net Premises and equipment, net Provision for credit losses Provision for Loan and Lease Losses Provision for credit losses Payments to Acquire Available-for-sale Securities Purchases of securities available for sale Payments to Acquire Federal Reserve Stock Purchases of Federal Home Loan Bank stock Purchases of Federal Home Loan Bank stock Payments to Acquire Finance Receivables Purchase of leasing and equipment finance portfolios and inventory finance portfolios Amount paid to acquire loans and leases Payments to Acquire Other Productive Assets Payments to Acquire Property, Plant, and Equipment Purchases of premises and equipment Repayments of Long-term Debt Payments on long-term borrowings Payments for Repurchase of Preferred Stock and Preference Stock Redemption of preferred stock Retained earnings Risk Based Ratios [Abstract] Tier 1 Risk-Based Capital Ratios Proceeds from Sale of Federal Reserve Stock Redemption of Federal Home Loan Bank stock Schedule of Long-term Debt Instruments [Table Text Block] Information about long-term borrowings Schedule of Other Nonoperating Expense, by Component [Table Text Block] Disclosure of Share-based Compensation Arrangements by Share-based Payment Award [Table Text Block] Restricted stock and stock option transactions under the Company Financial Incentive Stock Program Schedule of Segment Reporting Information, by Segment [Table Text Block] Reportable segments, including a reconciliation of consolidated totals Segment Reporting Information [Line Items] Segment Reporting Information Schedule of Segment Reporting Information, by Segment [Table] Segment Reporting Disclosure [Text Block] Business Segments Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Forfeited in Period, Weighted Average Grant Date Fair Value 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, Forfeited in Period Forfeited (in shares) Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period, Weighted Average Grant Date Fair Value 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 Granted (in shares) Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value Weighted-Average Grant Date Fair Value, Outstanding at the beginning (in dollars per share) Weighted-Average Grant Date Fair Value, Outstanding at the end (in dollars per share) Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number Outstanding at the beginning of the period (in shares) Outstanding at the end of the period (in shares) Employee Service Share-based Compensation, Nonvested Awards, Total Compensation Cost Not yet Recognized, Period for Recognition Weighted-average remaining amortization period for restricted stock and stock options (in years) Employee Service Share-based Compensation, Nonvested Awards, Total Compensation Cost Not yet Recognized Unrecognized stock compensation for restricted stock and stock options Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Vested in Period, Weighted Average Grant Date Fair Value 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 Vested (in shares) Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range, Upper Range Limit Stock Options, Exercise Price Range, Upper Range Limit (in dollars per share) Share-based Compensation Arrangement by Share-based Payment Award, Options, Forfeitures in Period, Weighted Average Exercise Price Stock Options, Forfeitures in Period, Weighted Average Exercise Price (in dollars per share) Share-based Compensation Arrangement by Share-based Payment Award, Options, Forfeitures in Period Stock Options Forfeited (in shares) Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Weighted Average Exercise Price Stock Options, Grants in Period, Weighted Average Exercise Price (in dollars per share) Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Net of Forfeitures Stock Options Granted (in shares) Grants of restricted stock (in shares) Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Exercise Price Stock Options, Outstanding, Weighted Average Exercise Price, Beginning of Period (in dollars per share) Stock Options, Outstanding, Weighted Average Exercise Price, End of Period (in dollars per share) Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Number Stock Options Outstanding at the beginning of the period (in shares) Stock Options Outstanding at the end of the period (in shares) Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Weighted Average Exercise Price Stock Options, Exercisable, Weighted Average Exercise Price (in dollars per share) Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Number Stock Options Exercisable (in shares) Schedule of Share-based Compensation Arrangement by Share-based Payment Award, Award Type and Plan Name [Axis] Share-based Compensation Arrangements by Share-based Payment Award, Award Type and Plan Name [Domain] Share-based Compensation Arrangement by Share-based Payment Award [Line Items] Share-based compensation Schedule of Share-based Compensation Arrangements by Share-based Payment Award [Table] Short-term Debt Short-term borrowings Consolidated Statements of Cash Flows Consolidated Statements of Equity Class of Warrant or Right, Outstanding Outstanding warrants to purchase common stock (in shares) Stockholders' Equity Note Disclosure [Text Block] Equity Class of Warrant or Right, Exercise Price of Warrants or Rights Warrants strike price (in dollars per share) Subordinated bank notes Supplemental Cash Flow Information [Abstract] Supplemental disclosures of cash flow information: Tier One Leverage Capital [Abstract] Tier 1 leverage capital Tier One Leverage Capital Required for Capital Adequacy to Average Assets Minimum Capital Requirement, Ratio (as a percent) Tier One Leverage Capital Required for Capital Adequacy Minimum Capital Requirement, Amount Tier One Leverage Capital Required to be Well Capitalized to Average Assets Well-Capitalized Capital Requirement, Ratio (as a percent) Tier One Leverage Capital Required to be Well Capitalized Well-Capitalized Capital Requirement, Amount Tier One Leverage Capital to Average Assets Actual, Ratio (as a percent) Tier One Leverage Capital Actual, Amount Tier One Risk Based Capital [Abstract] Tier 1 risk-based capital Tier One Risk Based Capital Required for Capital Adequacy to Risk Weighted Assets Minimum Capital Requirement, Ratio (as a percent) Tier One Risk Based Capital Required for Capital Adequacy Minimum Capital Requirement, Amount Tier One Risk Based Capital Required to be Well Capitalized to Risk Weighted Assets Well-Capitalized Capital Requirement, Ratio (as a percent) Tier One Risk Based Capital Required to be Well Capitalized Well-Capitalized Capital Requirement, Amount Tier One Risk Based Capital to Risk Weighted Assets Actual, Ratio (as a percent) Tier One Risk Based Capital Actual, Amount Capital Required for Capital Adequacy to Risk Weighted Assets Minimum Capital Requirement, Ratio (as a percent) Capital Required to be Well Capitalized to Risk Weighted Assets Well-Capitalized Capital Requirement, Ratio (as a percent) Capital to Risk Weighted Assets Actual, Ratio (as a percent) Noninterest Expense [Abstract] Non-interest expense: Noninterest Expense Total non-interest expense Non-interest expense Treasury Stock and Other U.S. Treasury Bills Weighted Average Number of Shares Outstanding, Diluted Weighted-average common shares outstanding for diluted earnings per common share (in shares) Weighted Average Number of Shares Outstanding, Basic Weighted-average common shares outstanding for basic earnings per common share (in shares) Weighted-average common shares outstanding used in basic earnings per common share calculation (in shares) TCF National Bank Common Stock Schedule of Available-for-sale Securities [Table] Major Types of Debt and Equity Securities [Domain] Preferred Stock Defined Benefit Plan, Recognized Net (Gain) Loss Due to Settlements Settlement expense Available-for-sale Securities, Amortized Cost Basis Amortized Cost Available-for-sale Securities, Debt Maturities, within One Year, Amortized Cost Basis Due in one year or less Available-for-sale Securities, Debt Maturities, after One Through Five Years, Amortized Cost Basis Due in 1-5 years Available-for-sale Securities, Debt Maturities, after Five Through Ten Years, Amortized Cost Basis Due in 5-10 years Available-for-sale Securities, Debt Maturities, after Ten Years, Amortized Cost Basis Due after 10 years Available-for-sale Securities, Debt Maturities, without Single Maturity Date, Amortized Cost Basis No stated maturity Available-for-sale Securities, Debt Maturities, Amortized Cost Basis Total Available-for-sale Securities, Debt Maturities, within One Year, Fair Value Due in one year or less Available-for-sale Securities, Debt Maturities, after One Through Five Years, Fair Value Due in 1-5 years Available-for-sale Securities, Debt Maturities, after Five Through Ten Years, Fair Value Due in 5-10 years Available-for-sale Securities, Debt Maturities, after Ten Years, Fair Value Due after 10 years Available-for-sale Securities, Debt Maturities, without Single Maturity Date, Fair Value No stated maturity Available-for-sale Securities, Debt Maturities, Amortized Cost Basis [Abstract] Amortized Cost Available-for-sale Securities, Debt Maturities, Fair Value [Abstract] Fair Value Available-for-sale Securities, Continuous Unrealized Loss Position, Less than Twelve Months, Fair Value Less than 12 months, Fair Value Available-for-sale Securities, Continuous Unrealized Loss Position, Twelve Months or Longer, Fair Value 12 months or more, Fair Value Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value Total, Fair Value Other securities Restricted Stock Warrants Schedule of Other Operating Cost and Expense, by Component [Table Text Block] Other Expense Assets. Total assets Loans Receivable, Gross, Commercial, Mortgage Permanent Loans Receivable, Gross, Commercial, Real Estate Commercial real estate Total commercial real estate Loans and Leases Receivable, Gross, Consumer, Real Estate Total consumer real estate Loans and Leases Receivable, Net Reported Amount Net loans and leases Other Income and Other Expense Disclosure [Text Block] Other Expense Segment Reporting Information, Revenue for Reportable Segment [Abstract] Revenues from external customers: Common Stock Issued, Employee Trust, Deferred Shares held in trust for deferred compensation plans, at cost Common Stock, Dividends, Per Share, Declared Dividends declared per common share (in dollars per share) Disclosure of Compensation Related Costs, Share-based Payments [Text Block] Stock Compensation Property Subject to or Available for Operating Lease, Net Operating leases Fair Value, by Balance Sheet Grouping [Table] Fair Value, by Balance Sheet Grouping, Disclosure Item Amounts [Axis] Fair Value, Disclosure Item Amounts [Domain] Carrying Amount Estimated Fair Value Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] Fair Value, Balance Sheet Grouping, Financial Statement Captions Scenario, Unspecified [Domain] Statement [Table] Statement, Scenario [Axis] Antidilutive Securities, Name [Domain] Financial Instruments, Financial Assets, Balance Sheet Groupings [Abstract] Financial instrument assets: Financial Instruments, Financial Liabilities, Balance Sheet Groupings [Abstract] Financial instrument liabilities: Assets Assets Statement [Line Items] Statement Netting adjustments Fair Value, Assets Measured on Recurring Basis [Table Text Block] Balances of assets measured at fair value on a recurring basis Readily Available Market Prices Observable Market Prices Company Determined Market Prices Fair Value, Assets and Liabilities Measured on Nonrecurring Basis [Table Text Block] Balances of assets measured at fair value on a non-recurring basis Treasury Stock, Value Treasury stock, at cost Other Liabilities Accrued expenses and other liabilities Earnings Per Share, Basic Basic (in dollars per share) Basic earnings per share (in dollars per share) Excess Tax Benefit from Share-based Compensation, Financing Activities Stock compensation tax benefit (expense) Increase (Decrease) in Stockholders' Equity [Roll Forward] Increase (Decrease) in Stockholders' Equity Stockholders' Equity, Period Increase (Decrease) Interest Expense, Borrowings Borrowings Interest Expense, Deposits Deposits Schedule of Treasury Stock by Class [Table Text Block] Treasury stock and other Preferred Stock, Par or Stated Value Per Share Preferred stock, par value $.01 per share, 30,000,000 shares authorized; non issued and outstanding Preferred stock, par value (in dollars per share) Common Stock, Shares, Issued Common stock, shares issued Depreciation, Nonproduction Long-term Debt Long-term borrowings Amount Preferred Stock, Shares Outstanding Preferred stock, shares outstanding Earnings Per Share, Basic [Abstract] Basic Earnings Per Common Share Earnings Per Share, Diluted [Abstract] Diluted Earnings Per Common Share Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount (in shares) Antidilutive Securities Excluded from Computation of Earnings Per Share, by Antidilutive Securities [Axis] Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items] Antidilutive Securities Excluded from Computation of Earnings Per Share Earnings Per Common Share Net income per common share: Schedule of Antidilutive Securities Excluded from Computation of Earnings Per Share [Table] Income (Loss) from Continuing Operations before Equity Method Investments, Income Taxes, Extraordinary Items, Noncontrolling Interest Income before income tax expense Schedule of Available-for-sale Securities, Major Types of Debt and Equity Securities [Axis] Schedule of Available-for-sale Securities [Line Items] Securities available for sale TCF Common Stock, Par or Stated Value Per Share Common stock, par value (in dollars per share) Treasury Stock, Shares Treasury stock, shares Stockholders' Equity Attributable to Parent Total TCF Financial Corporation stockholders' equity Income Tax Expense (Benefit) Income tax expense Income tax expense (benefit) Foreign Currency Transaction Gain (Loss), before Tax Net realized loss Available-for-sale Securities Pledged as Collateral Securities available for sale pledged as collateral Foreign Currency Transaction Loss, before Tax Forward exchange losses Foreign Currency Transaction Gain, before Tax Forward foreign exchange contract gains Schedule of Compliance with Regulatory Capital Requirements under Banking Regulations [Table Text Block] Regulatory tier 1 leverage, tier 1 risk-based and total risk-based capital levels, and applicable percentages of adjusted assets, together with the stated minimum and well-capitalized capital ratio requirements Schedule of Compliance with Regulatory Capital Requirements under Banking Regulations [Table] Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items] Compliance with Regulatory Capital Requirements under Banking Regulations Preferred Stock, Value, Issued Preferred stock, par value $.01 per share, 30,000,000 shares authorized; none issued and outstanding Time Deposits Certificates of deposit FHLB advances and securities sold under repurchase agreements Statement, Equity Components [Axis] Additional Paid-in Capital Retained Earnings Retained earnings, subject to certain restrictions Accumulated Other Comprehensive Income (Loss) Equity Component [Domain] Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range, Lower Range Limit Stock Options, Exercise Price Range, Lower Range Limit (in dollars per share) Long-term Debt [Text Block] Long-term Borrowings Goodwill Goodwill Federal Reserve Bank Stock Federal Reserve Bank stock, at cost Stock Issued During Period, Value, New Issues Public offering of common stock Public offering of common stock, net proceeds Treasury shares sold to TCF employee benefit plans, 757,612 shares Stock Issued During Period, Value, Employee Stock Purchase Plan Stock Issued During Period, Value, Restricted Stock Award, Gross Grants of restricted stock to directors, 5,656 and 324,663 shares during the presented periods of 2011 and 2010, respectively Stock Issued During Period, Value, Restricted Stock Award, Forfeitures Cancellation of shares of restricted stock Stock Issued During Period, Value, Stock Options Exercised Exercise of stock options, 0 and 93,800 shares during the presented periods of 2010 and 2009, respectively Stock Issued During Period, Shares, New Issues Public offering of common stock (in shares) Stock Issued During Period, Shares, Employee Stock Purchase Plans Treasury shares sold to TCF employee benefit plans, shares Stock Issued During Period, Shares, Restricted Stock Award, Gross Grants of restricted stock, shares Stock Issued During Period, Shares, Restricted Stock Award, Forfeited Cancellation of shares of restricted stock (in shares) Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period Exercise of stock options, shares Stock Issued During Period, Shares, Period Increase (Decrease) Eliminations U.S. Government sponsored enterprises and federal agencies Other Stock Repurchased During Period, Value Stock Repurchased During Period, Shares Stock Redeemed or Called During Period, Value Redemption of preferred stock Comprehensive Income Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding [Roll Forward] Outstanding Stock options Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested [Roll Forward] Dividends, Common Stock Adjustments to Additional Paid in Capital, Income Tax Benefit from Share-based Compensation Stock compensation tax benefits Weighted Average Number Diluted Shares Outstanding Adjustment [Abstract] Net dilutive effect of: Earnings Per Share [Text Block] Earnings Per Common Share Net Income (Loss), Including Portion Attributable to Noncontrolling Interest Income after income tax expense Income after income tax expense Income (loss) after income tax expense Weighted Average Number of Shares Outstanding, Diluted [Abstract] Weighted-average number of common shares outstanding adjusted for effect of dilutive securities: Incremental Common Shares Attributable to Nonvested Shares with Forfeitable Dividends Non-participating restricted stock (in shares) Comprehensive Income (Loss), Net of Tax, Including Portion Attributable to Noncontrolling Interest Comprehensive income Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest [Abstract] Equity: Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest Total equity Balance Balance Loans and Leases Receivable, Commercial, Net of Deferred Income Commercial Total commercial Loans and Leases Receivable, Consumer, Net of Deferred Income Consumer real estate and other Total consumer real estate and other Investments Other Investments Total investments Total adjustments Adjustments to Reconcile Net Income (Loss) to Cash Provided by (Used in) Operating Activities Income (loss) attributable to non-controlling interest Comprehensive Income (Loss), Net of Tax, Attributable to Noncontrolling Interest [Abstract] Comprehensive income: Derivatives, Fair Value [Line Items] Fair value of foreign exchange contracts Forward foreign exchange contracts Additional Collateral, Aggregate Fair Value Additional collateral required if the credit risk-related contingent features were triggered Derivative Contract Type [Domain] Fair Values Derivatives, Balance Sheet Location, by Derivative Contract Type [Table] Non-controlling Interests TCF Financial Corporation Loans and Leases Dividends, Common Stock, Cash Dividends on common stock Dividends on common stock Adjustments to Reconcile Net Income (Loss) to Cash Provided by (Used in) Operating Activities [Abstract] Adjustments to reconcile net income to net cash provided by operating activities: Long-term Debt, Type [Axis] Long-term Debt, Type [Domain] Adjustments to Additional Paid in Capital, Share-based Compensation, Requisite Service Period Recognition Amortization of stock compensation Investments Federal Home Loan Bank Advances and Reserve Disclosure [Text Block] Disclosure of long positions of investments in the Federal Home Loan Bank, Federal Reserve Bank and other investments. Supplemental Cash Flow Information Cash Paid [Abstract] Cash paid for: Transfer of loans and leases to other assets Transfer of Loans and Leases to Other Assets Transfer of value of loans and leases held in the entity's portfolio to Other Assets ATM revenue Fees and Commissions ATM Revenue Income earned from transactions and services related to ATM cards. Deposit account premiums Deposit Account Premiums The aggregate amount given to customers to open deposit accounts. Subtotal Noninterest Expense Excluding Other Expenses Total aggregate amount of all noninterest expense excluding operating lease depreciation, foreclosed real estate and repossessed assets, net expense and other credit costs, net. Noninterest expense, excluding other expenses Document and Entity Information Leases and Equipment Finance Income Leasing and equipment finance The total amount of revenue recognized for the period from operating, sales-type, financing and other leases, including minimum lease revenue, contingent revenue, percentage revenue and sublease revenue. Employee Stock Purchase Plan Pension and Other Postretirement Benefits Disclosure [Text Block] Employee Benefit Plans Description containing the entire employee's stock purchase plan, pension and other postretirement benefits disclosure as a single block of text. Retained Earnings Accumulated Deficit Subject to Restrictions Retained earnings, subject to certain restrictions The cumulative amount of the entity's undistributed earnings or deficit. A portion of the earnings are restricted by legal appropriation for thrift bad debt reserves. Change in shares held in trust for deferred compensation plans, at cost Shares Held in Trust for Deferred Comp Plans Increase (Decrease) Change in shares held in trust for deferred compensation plans, at cost Net change in value during the period of stock held in trust under terms of deferred compensation plan. Leases Receivable Commercial Lease and Equipment Financing Leasing and equipment finance Reflects the net carrying amount of commercial loans (money lent to commercial entities rather than consumers) made in the form of direct financing and equipment leases where the reporting entity (lessor) only recognizes interest revenue from the lease. Total leasing and equipment finance Loans Receivable Inventory Financing, Net of Deferred Income Inventory finance Reflects the net carrying amount of unpaid commercial variable rate loans which are secured by the underlying floor planned equipment and supported by repurchase agreements from original equipment manufacturers. Inventory finance loans Other Credit Costs, Net Other credit costs, net Amount of consumer real estate loan pool insurance, write-downs on residual values of operating leases and reserve requirements for expected losses on unfunded commitments. Loans and Leases Finance Receivables [Axis] Loans and leases finance receivables Axis represents members of loan and lease payments for various types of receivables purchased. Loans and Leases Finance Receivables [Domain] Loans and leases finance receivables Represents domain of members of the various types of acquisition costs based on grouping of loan and lease portfolios. Fees and Other Revenue Fees and other revenue Fees and other revenue Aggregate of fees and other revenue excluding gain (loss) on sale of securities Foreclosed Real Estate and Repossessed Assets Expense Foreclosed real estate and repossessed assets, net Amount of expense recognized during the period for the foreclosure on real estate assets and repossessed equipment. Debit Card Revenue Card revenue Income earned from transactions and services related to debit cards. Gain (Loss) on Sale of Securities Including Other than Temporary Impairment, Net Gains on securities, net The net gain or loss realized from the sale, exchange, redemption, retirement and other than temporary impairment charges of securities. Loans and Leases Finance Receivables Member Loans and leases finance receivables Represents domain of members of the various types of acquisition costs based on grouping of loan and lease portfolios. Leasing and Equipment Finance Represents member for leasing and equipment finance portfolios Inventory Finance Represents member for inventory finance portfolios Investments Loans and Leases Fair Value of Financial Instruments Schedule of Available-for-sale Securities Disclosure [Text Block] This element represents the disclosure related to available-for-sale securities, which consist of all investments in certain debt and equity securities that are neither classified as trading nor as held-to-maturity securities. Securities available for sale Schedule of Available-for-sale Securities Debt Maturities Amortized Cost Disclosure [Text Block] This element represents disclosure of the amortized cost and fair value of available-for-sale securities, which do not have a single contractual maturity date, such as mortgage-backed securities, over several maturity groupings. Such securities are classified neither as held-to-maturity nor as trading. Amortized cost and fair value of securities available for sale by contractual maturity Retail Banking This element represents the information about entity's Retail Banking segment, which includes branch banking and retail lending. Wholesale Banking This element represents the information about entity's Wholesale Banking segment, which includes commercial banking, leasing and equipment finance and inventory finance. Treasury Services This element represents the information about entity's Treasury Services segment, which includes the company's investment and borrowing portfolios and management of capital, debt and market risks, including interest-rate and liquidity risks. Support Services This element represents the information about entity's Support Services segment, which includes holding company and corporate functions that provide data processing, bank operations and other professional services to the operating segments. Actual, Amount Risk Based Capital This element represents total risk based capital as defined in the regulations. Risk Based Capital Required for Capital Adequacy This element represents the minimum amount of total risk based capital required for capital adequacy purposes under the regulatory framework for prompt corrective action. Minimum Capital Requirement, Amount Risk Based Capital Required to be Well Capitalized This element represents the amount of total risk based capital required to be categorized as well capitalized under the regulatory framework for prompt corrective action. Well-Capitalized Capital Requirement, Amount Total Risk Based Ratios [Abstract] Total Risk-Based Capital Ratios Tier 1 common capital Tier One Common Capital [Abstract] Tier One Common Capital This element represents the tier 1 common capital as defined in the regulations. Tier 1 common capital, Total Fair Value of Assets and Liabilities [Text Block] This item represents certain of the disclosures concerning the fair value of financial assets and financial liabilities (collectively, as defined), and the measurements of those instruments, assets, and liabilities. Such certain disclosures about the financial instruments, assets, and liabilities include: (1) the fair value of the required items together with their carrying amounts (as appropriate) and (2) the methodology and assumptions used in developing such estimates of fair value. Fair Value of Assets and Liabilities Federal Home Loan Bank stock, at cost: Federal Home Loan Bank Stock [Abstract] Federal Home Loan Bank Stock of Des Moines Federal Home Loan Bank (FHLB) stock of Des Moines represents an equity interest in FHLB Des Moines. It does not have a readily determinable fair value because its ownership is restricted and it lacks a market (liquidity). Des Moines Schedule of Available-for-sale Securities, Continuous Unrealized Loss Position [Table] Available-for-sale Securities, Continuous Unrealized Loss Position Available-for-Sale Securities Continuous Unrealized Loss Position [Line Items] Loans Receivable, Equipment Financing This element represents the gross carrying amount of commercial loans, which are issued for equipment financing. Equipment finance loans Common Capital to Risk Weighted Assets This element represents the tier 1 common capital divided by risk weighted assets as defined by regulations. Tier 1 common capital to risk weighted assets (as a percent) Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Additional Disclosures Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options Additional Disclosures [Roll forward] Federal Home Loan Bank Stock of Chicago Federal Home Loan Bank (FHLB) stock of Chicago represents an equity interest in FHLB Chicago. It does not have a readily determinable fair value because its ownership is restricted and it lacks a market (liquidity). Chicago Noninterest Income, after Intersegment Eliminations This element represents the total amount of noninterest income after intersegment eliminations 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. Non-interest income (expense) Ownership Interest in Joint Venture Percentage by Parent This element represents the percentage of ownership in Red Iron Acceptance, LLC ("Red Iron") by TCF. Ownership interest in Joint Venture, by TCF (as a percent) Ownership Interest in Joint Venture Percentage by Noncontrolling Owners This element represents the percentage of ownership in Red Iron Acceptance, LLC ("Red Iron") by Toro Company. Ownership interest in Joint Venture, by Toro Company (as a percent) Total risk-based capital Total Risk Based Capital [Abstract] Stock Options, Exercise Price Range Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Roll Forward] Stock Options, Additional Disclosures Share-based Compensation Arrangement by Share-based Payment Award Options Additional Disclosures [Roll Forward] Schedule of Earnings Per Share Disclosure [Text Block] This element represents the disclosure pertaining to an entity's earnings per share. Computation of basic and diluted earnings per common share Net Income (Loss) Allocated to Participating Securities Basic The portion of net income (loss) allocated to participating security holders whose contracts entitle them to a portion of the entity's earnings or surplus and which is deducted from earnings available to common stockholders in order to derive the earnings allocated to common stockholders. Earnings allocated to participating securities Weighted Average Number of Shares Outstanding, Gross, Basic Number of [basic] shares, before making adjustment for contingently issuable shares, restricted stocks and other shares that are not deemed to be outstanding and are determined by relating the portion of time within a reporting period during which common shares have been outstanding. Weighted-average shares outstanding (in shares) Non-participating restricted stock and stock options Incremental common shares that are attributable to non-participating restricted stock and stock options that were not included in diluted earnings per share (EPS) because to do so would have increased EPS amount or decreased loss per share amount for the period presented. Weighted Average Yield on Securities Available-for-sale This element represents the weighted-average yield percentage on securities available for sale as of the balance sheet date. Weighted-average yield (as a percent) Consumer real estate and other: Loans and Leases Receivable Consumer Real Estate and Other [Abstract] Loans and Leases Receivable Consumer Junior Lien This element represents consumer real estate loans secured by a junior lien position. Junior lien Loans Receivable Commercial Construction and Development This element represents the gross carrying amount of unpaid loans that had been issued to businesses to construct a facility and develop land for sale. Acquisition, development and construction (ADC) loans are generally issued sequentially and the net proceeds of the latest debt are used by the borrower to pay off the preceding loan. A construction loan is generally expected to be paid off with the net proceeds from permanent financing. Construction and development Loans Receivable Commercial Business This element represents the gross carrying amount of unpaid commercial loans secured by business assets other than real estate, including inventory, receivables, equipment and financial instruments. Commercial business Leasing and equipment finance: Leases Receivable Leasing and Equipment Financing [Abstract] Lease financings: Leases Receivable Lease Financings [Abstract] Capital Leases Receivable Lease Residuals This element represents the estimated fair value of the leased equipment at the expiration of the initial term of the transaction. Lease residuals Leases Receivable Unearned Income and Deferred Lease Costs Unearned income relates to rental payments received in advance that will be earned and recognized as revenue in subsequent reporting periods. Deferred lease costs refer to costs incurred by the lessor that are: (a) costs to originate a lease incurred in transactions with independent third parties that: (i) result directly from and are essential to acquire that lease; and (ii) would not have been incurred had that leasing transaction not occurred; and (b) certain costs that are directly related to specified activities performed by the lessor for that lease. Unearned income and deferred lease costs Deposit account losses Deposit Account Losses This element represents other losses (fraudulent checks, etc.) associated with deposit accounts. Card Processing and Issuance Expenses This element represents the amount of expenses incurred during the period for card processing and issuance. Card processing and issuance Senior unsecured term note This element represents the unsecured notes with the highest claim on the assets of the issuer, in case of bankruptcy or liquidation. Senior unsecured note holders are paid off in full before making any payment to junior note holders. Percentage Change Percentage Change [Abstract] This element represents the percentage increase (decrease) in a reported value of consumer first mortgage lien loans when comparing the current period end and the period end of the previous fiscal year. Loans and Leases Receivable Consumer Mortgage Percent Change Period End over Year End First mortgage lien, Percentage Change (as a percent) Loans and Leases Receivable Consumer Junior Lien Percent Change Period End over Year End This element represents the percentage increase (decrease) in a reported value of consumer junior lien loans when comparing the current period end and the period end of the previous fiscal year. Junior lien, Percentage Change (as a percent) Loans and Leases Receivable Consumer Real Estate Percent Change Period End over Year End This element represents the percentage increase (decrease) in a reported value of total consumer real estate loans when comparing the current period end and the period end of the previous fiscal year. Total consumer real estate, Percentage Change (as a percent) Other Noninterest Expense, Other This element represents the amount of other non-interest expenses incurred in the period not separately presented in the statement of income or in the other expense note. Other ATM Processing Expenses This element represents the amount of expenses incurred during the period for ATM processing. ATM processing Outside Processing Expenses This element represents the amount of expenses incurred during the period for outside processing. Outside processing Loans and Leases Receivable Consumer Other Percent Change Period End over Year End This element represents the percentage increase (decrease) in a reported value of other consumer loans when comparing the current period end and the period end of the previous fiscal year. Other, Percentage Change (as a percent) Loans and Leases Receivable Consumer Net of Deferred Income Percent Change Period End over Year End This element represents the percentage increase (decrease) in a reported value of total consumer real estate and other loans when comparing the current period end and the period end of the previous fiscal year. Total consumer real estate and other, Percentage Change (as a percent) Loans Receivable Commercial Real Estate Permanent Percent Change Period End over Year End This element represents the percentage increase (decrease) in a reported value of permanent commercial real estate loans when comparing the current period end and the period end of the previous fiscal year. Permanent, Percentage Change (as a percent) Loans Receivable Commercial Construction and Development Percent Change Period End over Year End This element represents the percentage increase (decrease) in a reported value of construction and development loans related to commercial real estate when comparing the current period end and the period end of the previous fiscal year. Construction and development, Percentage Change (as a percent) Loans Receivable Commercial Real Estate Percent Change Period End over Year End This element represents the percentage increase (decrease) in a reported value of total commercial real estate loans when comparing the current period end and the period end of the previous fiscal year. Total commercial real estate, Percentage Change (as a percent) Loans Receivable Commercial Business Percent Change Period End over Year End This element represents the percentage increase (decrease) in a reported value of commercial business loans when comparing the current period end and the period end of the previous fiscal year. Commercial business, Percentage Change (as a percent) Loans and Leases Receivable Commercial Net of Deferred Income Percent Change Period End over Year End This element represents the percentage increase (decrease) in a reported value of total commercial loans when comparing the current period end and the period end of the previous fiscal year. Total commercial, Percentage Change (as a percent) Capital Leases Net Investment in Direct Financing Leases Percent Change Period End over Year End This element represents the percentage increase (decrease) in a reported value of direct financing leases when comparing the current period end and the period end of the previous fiscal year. Direct financing leases, Percentage Change (as a percent) Capital Leases Net Investment in Sales Type Leases Percent Change Period End over Year End This element represents the percentage increase (decrease) in a reported value of sales-type leases when comparing the current period end and the period end of the previous fiscal year. Sales-type leases, Percentage Change (as a percent) Capital Leases Receivable Lease Residuals Percent Change Period End over Year End This element represents the percentage increase (decrease) in a reported value of lease residuals when comparing the current period end and the period end of the previous fiscal year. Lease residuals, Percentage Change (as a percent) Leases Receivable Unearned Income and Deferred Lease Costs Percent Change Period End over Year End This element represents the percentage increase (decrease) in a reported value of unearned income and deferred lease costs when comparing the current period end and the period end of the previous fiscal year. Unearned income and deferred lease costs, Percentage Change (as a percent) Maturity Year 2016 This element represents the maturity year of long-term debt that will mature in 2016. This element represents the maturity year of long-term debt that will mature in 2017. Maturity Year 2017 Total lease financings, Percentage Change (as a percent) Leases Receivable Commercial Lease Financings Percent Change Period End over Year End This element represents the percentage increase (decrease) in a reported value of total lease financings when comparing the current period end and the period end of the previous fiscal year. Loans Receivable Inventory Financing Net of Deferred Income Percent Change Period End over Year End This element represents the percentage increase (decrease) in a reported value of inventory finance when comparing the current period end and the period end of the previous fiscal year. Inventory finance, Percentage Change (as a percent) Loans and Leases Receivable Net of Deferred Income Percent Change Period End over Year End This element represents the percentage increase (decrease) in a reported value of total loans and leases when comparing the current period end and the period end of the previous fiscal year. Total loans and leases, Percentage Change (as a percent) Discounted lease rentals This element represents the lease rentals, which are discounted to their current value using specific discounting rate. Long-term Debt Maturity by Year [Domain] This element represents the maturity year for the debt instrument that distinguishes the instrument from other debt instruments. Maturity Year 2010 This element represents the maturity year of long-term debt that is maturing in 2010. Leases Receivable Commercial Lease and Equipment Financing Percent Change Period End over Year End This element represents the percentage increase (decrease) in a reported value of total leasing and equipment finance when comparing the current period end and the period end of the previous fiscal year. Total leasing and equipment finance, Percentage Change (as a percent) Maturity Year 2011 This element represents the maturity year of long-term debt that will mature in 2011. This element represents the maturity year of long-term debt that will mature in 2012. Maturity Year 2012 This element represents the maturity year of long term-debt that will mature in 2013. Maturity Year 2013 This element represents the maturity year of long-term debt that will mature in 2014. Maturity Year 2014 This element represents the maturity year of long-term debt that will mature in 2015. Maturity Year 2015 This element represents the maturity year of long-term debt that will mature in 2018. Maturity Year 2018 This element represents the maturity year of long-term debt that will mature in 2068. Maturity Year 2068 Federal Home Loan Bank Advances Containing One Time Call Provision This element represents the amount of Federal Home Loan Bank advances outstanding, which contain one-time call provisions. FHLB advances which contain one-time call provisions Federal Home Loan Bank Repurchase Agreements Containing One Time Call Provision This element represents the amount of Federal Home Loan Bank repurchase agreements outstanding, which contain one-time call provisions. Repurchase agreements which contain one-time call provisions Schedule of Federal Home Loan Bank Advances and Repurchase Agreements Outstanding [Table] Federal Home Loan Bank Advances and Repurchase Agreements Outstanding [Axis] Federal Home Loan Bank Advances and Repurchase Agreements Outstanding as Per Maturity Year [Domain] This element represents the maturity year of callable FHLB advances and repurchase agreements outstanding. This element represents the callable Federal Home Loan Bank advances and repurchase agreements outstanding on balance sheet date maturing in 2010. Callable FHLB advances and repurchase agreements - 2010 This element represents the callable Federal Home Loan Bank advances and repurchase agreements outstanding on balance sheet date maturing in 2011. Callable FHLB advances and repurchase agreements - 2011 This element represents the callable Federal Home Loan Bank advances and repurchase agreements outstanding on balance sheet date maturing in 2015. Callable FHLB advances and repurchase agreements - 2015 This element represents the callable Federal Home Loan Bank advances and repurchase agreements outstanding on balance sheet date maturing in 2016. Callable FHLB advances and repurchase agreements - 2016 This element represents the callable Federal Home Loan Bank advances and repurchase agreements outstanding on balance sheet date maturing in 2017. Callable FHLB advances and repurchase agreements - 2017 This element represents the callable Federal Home Loan Bank advances and repurchase agreements outstanding on balance sheet date maturing in 2018. Callable FHLB advances and repurchase agreements - 2018 Next Call of FHLB Advances and Repurchase Agreements This element represents the call amount of advances and repurchase agreements Federal Home Loan Bank outstanding as of the Balance Sheet date. Next Call Amount Maturity Amount of FHLB Advances and Repurchase Agreements This element represents the maturity amount of advances and repurchase agreements outstanding from the Federal Home Loan Bank outstanding as of the Balance Sheet date. Stated Maturity Amount Other Misc Investments Other investments not otherwise specified in the taxonomy, excluding investments in Federal Home Loan Bank and Federal Reserve Bank stock. Other Callable Federal Home Loan Bank Advances and Repurchase Agreements Outstanding Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. Callable Federal Home Loan Bank Advances and Repurchase Agreements Outstanding [Line Items] Weighted Average Rate on FHLB Advances and Repurchase Agreements Outstanding This element represents the weighted average rate based on original maturity year for Federal Home Loan Bank advances and repurchase agreements. Weighted-average Rate based on stated maturity year (as a percent) Loans Receivable Equipment Financing Percent Change Period End over Year End Equipment finance loans, Percentage Change (as a percent) This element represents the percentage increase (decrease) in a reported value of equipment finance loans when comparing the current period end and the period end of the previous fiscal year. This element represents the assets held in trust for deferred compensation plans. Assets held in trust for deferred compensation plans Treasury Stock Value and Common Stock Issued, Employee Trust Deferred Treasury stock at cost, plus shares held in trust for deferred compensation plans, at cost. Treasury stock at cost, 45,504 and 51,160 shares, and other Total Schedule of Callable Federal Home Loan Bank Advances [Table Text Block] This Schedule shows callable Federal Home Loan Bank Advances. FHLB advances and repurchase agreements outstanding Federal Home Loan Bank Advances and Repurchase Agreements Callable Quarterly This element represents the amount of fixed-rate Federal Home Loan Bank advances and repurchase agreements outstanding, which are callable quarterly by counterparties at par until maturity. Fixed-rate FHLB advances and repurchase agreements which are callable quarterly Weighted Average Rate for Call Year of FHLB Advances and Repurchase Agreements This element represents the weighted average rate based on next call year for Federal Home Loan Bank advances and repurchase agreements. Weighted-Average Rate based on next call year (as a percent) Stock Repurchase Authorization This element represents the number of shares under share repurchase programs that have been authorized by an entity's board of directors. Stock repurchase program authorization (in shares) Net Income (Loss) Allocated to Common Stock Net income after making adjustment for dividends on preferred stock (declared in the period), dividends on cumulative preferred stock (accumulated for the period) and income allocated to participating securities. Earnings allocated to common stock Earnings allocated to common stock Weighted Average Number of Shares of Non Participating Restricted Stock under Two Class Method Number of shares of restricted stock classified as non-participating under the two-class method of calculating earnings per share determined by relating the portion of time within a reporting period that restricted shares have been outstanding to the total time in that period. Restricted shares are subject to sales, contractual, regulatory or other restrictions that prevent or inhibit the holder from freely disposing of them before the restriction ends. Restricted stock (in shares) Fair Value Assets, Types of Assets [Axis] This element represents a number of concepts which capture the general categories of assets. Fair Value Types of Assets [Domain] Provides general categories of assets for which information is required or determined to be disclosed. Allowance for Loan and Lease Losses and Credit Quality Information Acquired Loans and Leases Disclosure [Text Block] Acquired Loans and Leases Description and amounts of all categories of loans and leases acquired by the entity and the expected principal cash flows related to those loans. Schedule of Accretable Yield Activity for Loans and Leases Acquired [Table Text Block] Disclosure of the accretable yield activity for all acquired loan and lease portfolios during the period. Summary of accretable yield activity for acquired loan and lease portfolios Non Accretable Discounts on Loans and Leases Represents the difference between contractual cash flows and expected cash flows as of the balance sheet date. Non-accretable discounts Loans and Leases Acquired Accretable Yield Movement Schedule [Roll Forward] Summary of accretable yield activity for acquired loan and lease portfolios Loans and Leases Acquired Accretable Yield The aggregate excess of cash flows expected to be collected over the investor's initial investment in loans and leases acquired. Balance at the beginning of the period Balance at the end of the period Loans and Leases Acquired Accretable Yield Addition Increase in the aggregate excess of cash flows expected to be collected over the investor's initial investment in loans and leases acquired. Portfolio acquisitions Loans and Leases Acquired Accretable Yield Accretion Current period recognition due to an accretion in the excess of cash flows expected to be collected over the investor's initial investment in loans and leases. Accretion Remaining Accretion for Loans with Deteriorated Credit Quality Represents the amount of remaining accretion for loans acquired with deteriorated credit quality at the balance sheet date. Remaining accretion for loans acquired with deteriorated credit quality Principal Cash Flows and Future Minimum Lease Payments Receivable Represents the principal cash flows to be collected over the life of loan contracts and future minimum lease payments receivable, as of the date of acquisition. Loan principal cash flows and minimum lease payments receivable Schedule of Foreign Exchange Contracts Statement of Income [Table Text Block] Disclosure of the presentation of foreign exchange contracts on the statement of income, including the location of such amounts. Net impact of foreign exchange activity on other non-interest expense Maximum Remaining Maturity of Foreign Currency Derivatives Period for settling forward foreign exchange contracts excluding contracts associated with cash flow hedges (in days) Notional Amount of Foreign Currency Derivative Sale Contracts Notional amount Entity Registrant Name Entity Central Index Key Document Type Document Period End Date Amendment Flag Amendment Description Current Fiscal Year End Date Entity Well-known Seasoned Issuer Entity Voluntary Filers Entity Current Reporting Status Entity Filer Category Entity Public Float Entity Common Stock, Shares Outstanding Document Fiscal Year Focus Document Fiscal Period Focus Cancellation of common shares for tax withholding (in shares) Shares Paid for Tax Withholding for Share Based Compensation Cancellation of common shares for tax withholding Adjustments Related to Tax Withholding for Share-based Compensation Segment [Domain] Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Aggregate Losses 12 months or more, Unrealized Losses Revenues Total Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Remaining Contractual Term Stock Options Outstanding, Weighted Average Remaining Contractual Term (in years) Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Table] Fair Value, Measurements, Fair Value Hierarchy [Domain] Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] Assets and liabilities measured at fair value on a recurring basis Assets and liabilities measured at fair value on a nonrecurring basis Fair Value, Hierarchy [Axis] Derivative Instrument Risk [Axis] Statement, Business Segments [Axis] Schedule of Comprehensive Income (Loss) [Table Text Block] Components of comprehensive income Schedule of Net Benefit Costs [Table Text Block] Net periodic benefit cost included in compensation and employee benefits expense Schedule of Unrealized Loss on Investments [Table Text Block] Securities available for sale, portfolio's gross unrealized losses and fair value Schedule of Foreign Exchange Contracts, Statement of Financial Position [Table Text Block] Summary of forward foreign exchange contracts Available-for-sale Securities, Gross Unrealized Gains Gross Unrealized Gains Legal Entity [Axis] Entity [Domain] Forward foreign currency contract Liabilities, Fair Value Disclosure Total liabilities Assets, Fair Value Disclosure Total Assets Total Measurement of fair value on a recurring basis Measurement of fair value on a nonrecurring basis Repossessed and Returned Equipment, Fair Value Disclosure Represents the fair value of repossessed and returned equipment. Repossessed and returned equipment Loans Receivable, Fair Value Disclosure Loans Real Estate, Gross Real estate owned Investment Owned, at Fair Value Investments Fair Value by Measurement Frequency [Axis] Fair Value, Measurement Frequency [Domain] Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Gain (Loss) Included in Other Comprehensive Income (Loss) Decreases in fair values recorded through other comprehensive income Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Settlements Decreases in fair values due to principal pay-downs Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset Transfers Into Level 3 Transfers between securities measured at fair value using Readily Available Market Prices and securities measured using Company Determined Market Prices Other Comprehensive Income, Derivatives Qualifying as Net Investment Hedges before Tax Period Increase (Decrease) Pre tax change in accumulated gains and losses from derivative instruments designated and qualifying as the effective portion of net investment hedges, net of reclassifications into earnings during the period. A cash flow hedge is a hedge of the exposure to variability in the cash flows of a recognized asset or liability or a forecasted transaction that is attributable to a particular risk. Net investment hedge Other Comprehensive Income (Loss), Derivatives Qualifying as Hedges, before Tax Cash flow hedge Investments, Fair Value Disclosure Investments Available-for-sale Securities, Fair Value Disclosure Securities available for sale Commercial business Loans Receivable Commercial Business, Fair Value Disclosure Represents the fair value of unpaid commercial loans secured by business assets other than real estate, including inventory, receivables, equipment and financial instruments. Equipment finance loans Loans Receivable, Equipment Financing, Fair Value Disclosure Represents the fair value of commercial loans, which are issued for equipment financing. Inventory finance loans Loans Receivable Inventory Financing Net of Deferred Income Fair Value Disclosure Represents the fair value of unpaid commercial variable rate loans which are secured by the underlying floor planned equipment and supported by repurchase agreements from original equipment manufacturers. Total financial instrument assets Financial Instrument, Assets, Fair Value Disclosure Represents the fair value of various categories of unpaid commercial loans and other financial instruments. Checking, savings and money market deposits Demand Deposits, Fair Value Disclosure Represents the fair value of accounts that may or may not bear interest and that the depositor is entitled to withdraw at anytime without prior notice. Checking, savings and negotiable order of withdrawal (NOW) accounts are the most common forms of demand deposits. Short-term Debt, Fair Value Short-term borrowings Long-term Debt, Fair Value Long-term borrowings Total financial instrument liabilities Financial Instrument, Liabilities, Fair Value Disclosure Represents the fair value of financial instruments which are a part of liabilities. Commitments to extend credit Fair Value Disclosure, Off-balance Sheet Risks, Amount Commitments to Extend Credit Represents the fair value of commitments to extend credit, which are not recognized in financial statements (off-balance sheet). Standby letters of credit Fair Value Disclosure, Off-balance Sheet Risks, Amount Letters of Credit Outstanding Represents the fair value of standby letters of credit, which are not recognized in financial statements (off-balance sheet) because they fail to meet some other criterion for recognition. Fair Value Disclosure, Off-balance Sheet Risks, Amount, Liability Total financial instruments with off-balance sheet risk Hedging Designation [Axis] Hedging Designation [Domain] Designated as Hedges Derivative Asset, Fair Value, Gross Asset Fair value of derivative assets Derivative Liability, Fair Value, Gross Liability Fair value of derivative liabilities Derivative Instruments, Gain (Loss) by Hedging Relationship, by Income Statement Location, by Derivative Instrument Risk [Table] Derivative Instruments, Gain (Loss) by Hedging Relationship [Axis] Hedging Relationship [Domain] Cash Flow Hedges Net Investment Hedges Derivative Instruments, Gain (Loss) [Line Items] Derivatives instruments, gain (loss) Unrealized Loss on Foreign Currency Derivatives, before Tax Unrealized losses on derivatives classified as cash flow hedges recorded in other comprehensive income (loss) Foreign Currency Cash Flow Hedge Gain (Loss) to be Reclassified During Next 12 Months Estimated amount to be reclassified from other comprehensive income (loss) into earnings during the next 12 months Gain (Loss) on Derivative Used in Net Investment Hedge, Net of Tax Gains or losses included in the cumulative translation adjustment within other comprehensive income (loss) Accumulated Other Comprehensive Income (Loss) [Abstract] Accumulated other comprehensive income (loss): Accumulated Other Comprehensive Income (Loss), Foreign Currency Translation Adjustment, Net of Tax Foreign currency translation adjustment Accumulated Other Comprehensive Income (Loss) Cumulative Changes in Net Gain (Loss) from Net Investment Hedges Effect Net of Tax Accumulated change, net of tax, in accumulated gains and losses from derivative instruments designated and qualifying as the effective portion of net investment hedges. Net investment hedge Accumulated Other Comprehensive Income (Loss), Cumulative Changes in Net Gain (Loss) from Cash Flow Hedges, Effect Net of Tax Cash flow hedge Accumulated Other Comprehensive Income (Loss) Cumulative Changes in Net Gain (Loss) from Derivative Net of Tax