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Time deposits include, but are not limited to, certificates of deposits, individual retirement accounts and open accounts. 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Maturing in Year Two, range of interest rates (in Percent) Maturing in Year Two, range of interest rates (in Percent) Amount of Federal Home Loan Bank (FHLB) advances which have floating interest rates maturing in the second fiscal year. Recorded Investment, With no specific allowance recorded Financing Receivable, Nonaccrual, No Allowance Gross Amounts Offset in Balance Sheet, Derivative assets and liabilities Derivative Asset (Liability), Collateral, Offset Derivative Asset (Liability), Collateral, Offset Time deposit accounts with balances of $250,000 or more Time Deposits, at or Above FDIC Insurance Limit Net cash used in investing activities Net cash used in investing activities Net Cash Provided by (Used in) Investing Activities Fair Value, Recurring and Nonrecurring [Table] Fair Value, Recurring and Nonrecurring [Table] Deposits Interest Expense, Deposits Total Lease Liability, Payments, Due Year Three Total Lease Liability, Payments, Due Year Three Total Lease Liability, Payments, Due Year Three Finance lease liabilities recognized from obtaining ROU assets Finance lease liabilities recognized from obtaining ROU assets Finance lease liabilities recognized from obtaining ROU assets Common Equity Tier One Risk Based Capital Required to be Well Capitalized Common Equity Tier One Capital Required to be Well-Capitalized Income Tax Authority [Axis] Income Tax Authority [Axis] Non-interest bearing, average rate (in Percent) Non-interest bearing, average rate (in Percent) The weighted average interest rate for domestic non-interest bearing deposits. Bridge - equipment finance [Member] Bridge - equipment finance [Member] Bridge - equipment finance [Member] Deferred tax liabilities: Deferred Tax Liabilities, Gross [Abstract] Total Lease Liabilities Total Lease Liabilities Total Lease Liabilities Total Lease Liabilities Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value Condensed Balance Sheet Statement [Table] Condensed Balance Sheet Statement [Table] Summary of Average Balances and Weighted Average Rates Paid on Deposits Summary of Average Balances and Weighted Average Rates Paid on Deposits Tabular disclosure of the summary of average balances and weighted average rates paid on deposits. Document Fiscal Period Focus Document Fiscal Period Focus Net change in unrealized gain on securities available for sale Other Comprehensive Income (Loss), Securities, Available-for-sale, Adjustment, after Tax Other Comprehensive Income (Loss), Securities, Available-for-sale, Adjustment, after Tax Common stock, shares issued (in Shares) Common Stock, Shares, Issued FHLB advances Advances from Federal Home Loan Banks, Total Advances from Federal Home Loan Banks Share-based Compensation Arrangement by Share-based Payment Award, Non-Option Equity Instruments, Forfeitures and Expirations Share-based Compensation Arrangement by Share-based Payment Award, Non-Option Equity Instruments, Forfeitures and Expirations Schedule of Cash Flow Hedging Instruments, Statements of Financial Performance and Financial Position, Location [Table Text Block] Schedule of Cash Flow Hedging Instruments, Statements of Financial Performance and Financial Position, Location [Table Text Block] Common stock, par value (in Dollars per Share) Common Stock, Par or Stated Value Per Share Unused lines of Credit [Member] Unused lines of Credit [Member] Gross Amounts Recognized, Derivative assets and liabilities Gross Amounts Recognized Derivative Assets And Liabilities Gross Amounts Recognized Derivative Assets And Liabilities Non-interest bearing Cash and Due from Banks Bank owned life insurance Bank Owned Life Insurance OREO and Repossessed Assets [Member] OREO and Repossessed Assets [Member] OREO and Repossessed Assets [Member] FHLB advances Federal Home Loan Bank Borrowings, Fair Value Disclosure Depreciation, Nonproduction Depreciation, Nonproduction Entity Filer Category Entity Filer Category Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Available for Grant Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Available for Grant Accumulated Depreciation, Depletion and Amortization, Property, Plant, and Equipment Accumulated Depreciation, Depletion and Amortization, Property, Plant, and Equipment Technology and telecommunications Communications and Information Technology Finance Lease, Liability, Payments, Due after Year Five Finance Lease, Liability, Payments, Due after Year Five 60 - 89 Days Past Due Financial Asset, 60 to 89 Days Past Due [Member] Gross Unrealized Gains Available-for-sale Securities, Accumulated Gross Unrealized Gain, before Tax (Increase) decrease in other assets Increase (Decrease) in Other Operating Assets Commitments and Contingencies Commitments and Contingencies Disclosure [Text Block] Brokers and Dealers [Abstract] Employee compensation and benefits Labor and Related Expense Demand, savings and money market deposits Deposits, Money Market Deposits and Negotiable Order of Withdrawal (NOW) Derivative Financial Instruments, Liabilities [Member] Derivative Financial Instruments, Liabilities [Member] Leasehold Improvements [Member] Leasehold Improvements [Member] Net Amounts Presented in Balance Sheet, Derivative assets Derivative Asset, Fair Value, Amount Not Offset Against Collateral Software, software licensing rights and capitalized costs of CCA Software and Software Development Costs [Member] Incentive Compensation Arrangements [Member] Incentive Compensation Arrangements [Member] Incentive Compensation Arrangements [Member] Accounting Standards Update 2016-02 [Member] Accounting Standards Update 2016-02 [Member] Federal Reserve Bank Advances [Member] Federal Reserve Bank Advances [Member] Operating Leases, Future Minimum Payments Receivable, in Five Years Operating Leases, Future Minimum Payments Receivable, in Five Years FICO, 760 or greater FICO Score 760 or Greater [Member] State and municipal obligations State and municipal obligations US States and Political Subdivisions Debt Securities [Member] Consolidated Entities [Axis] Consolidated Entities [Axis] Derivative Instruments, Gain Reclassified from Accumulated OCI into Income, Effective Portion Derivative Instruments, Gain Reclassified from Accumulated OCI into Income, Effective Portion 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] Loans and Leases Receivable, Impaired, Interest Lost on Nonaccrual Loans Loans and Leases Receivable, Impaired, Interest Lost on Nonaccrual Loans Restatement [Axis] Restatement [Axis] Schedule of Effective Income Tax Rate Reconciliation [Table Text Block] Schedule of Effective Income Tax Rate Reconciliation [Table Text Block] Common stock, par value $0.01 per share, 400,000,000 shares authorized; 93,067,500 and 95,128,231 shares issued and outstanding Common Stock, Value, Issued Financing Receivable, Change in Method, Credit Loss Expense (Reversal) Financing Receivable, Change in Method, Credit Loss Expense (Reversal) Capital Required for Capital Adequacy to Risk Weighted Assets Capital Required for Capital Adequacy to Risk Weighted Assets Cash and cash equivalents Cash and cash equivalents Cash and cash equivalents, beginning of period Cash and cash equivalents, end of period Cash and Cash Equivalents, at Carrying Value Non-interest income: Noninterest Income [Abstract] Interest bearing, average balance Interest bearing, average balance Average balance of interest-bearing domestic deposit liabilities, which may include brokered, retail, demand, checking, notice of withdrawal, money market and other interest-bearing deposits. Weighted average shares for basic earnings per common share Weighted Average Number of Shares Outstanding, Basic Federal Home Loan Bank, Advances, Branch of FHLB Bank [Line Items] Federal Home Loan Bank, Advances, Branch of FHLB Bank [Line Items] Operating Lease, Right-of-Use Asset Operating Lease, Right-of-Use Asset New York Tri-State [Member] New York Tri-State [Member] New York Tri-State [Member] Financing Receivable, Held-for-investment Financing Receivable, Held-for-investment [Policy Text Block] New Accounting Pronouncement or Change in Accounting Principle, Effect of Adoption, Quantification New Accounting Pronouncement or Change in Accounting Principle, Effect of Adoption, Quantification Equity Components [Axis] Equity Components [Axis] Deferred Tax Liabilities, Net Deferred Tax Liabilities, Net Average recorded investment in impaired loans Average recorded investment in impaired loans Impaired Financing Receivable, Average Recorded Investment Gain on investment securities, net Gain on investment securities, net Gain (Loss) on Investments Commercial real estate, Non-owner occupied Commercial Real Estate Non-Owner Occupied [Member] Commercial Real Estate Non-Owner Occupied [Member] Financing Receivable, Revolving Financing Receivable, Revolving Credit Loss, Financial Instrument [Policy Text Block] Credit Loss, Financial Instrument [Policy Text Block] Debt Securities, Available-for-sale, Restricted Debt Securities, Available-for-sale, Restricted Private label residential mortgage-backed securities and CMOs Residential Mortgage Backed Securities [Member] Deposit insurance expense Federal Deposit Insurance Corporation Premium Expense Borrowings [Member] Borrowings [Member] Current Federal Tax Expense (Benefit) Current Federal Tax Expense (Benefit) Entity Address, Address Line One Entity Address, Address Line One Increase (Decrease) in Fair Value of Interest Rate Fair Value Hedging Instruments Increase (Decrease) in Fair Value of Interest Rate Fair Value Hedging Instruments Collateralized loan obligations Collateralized loan obligations Collateralized Loan Obligations [Member] Lease, Cost [Table Text Block] Lease, Cost [Table Text Block] Entity Emerging Growth Company Entity Emerging Growth Company Mortgage Loans in Process of Foreclosure, Amount Mortgage Loans in Process of Foreclosure, Amount Non-marketable equity securities Federal Home Loan Bank Stock and Federal Reserve Bank Stock Financing Receivable, Allowance for Credit Loss [Line Items] Financing Receivable, Allowance for Credit Loss [Line Items] Cash and cash equivalents Cash and Cash Equivalents, Fair Value Disclosure Financial Asset, Equal to or Greater than 90 Days Past Due [Member] 90 Days or More Past Due Financial Asset, Equal to or Greater than 90 Days Past Due [Member] Phantom Share Units (PSUs) Phantom Share Units (PSUs) [Member] Unrecognized Tax Benefits, Increase Resulting from Prior Period Tax Positions Unrecognized Tax Benefits, Increase Resulting from Prior Period Tax Positions Initial Application Period Cumulative Effect Transition [Axis] Initial Application Period Cumulative Effect Transition [Axis] Net cash provided by operating activities Net cash provided by operating activities Net Cash Provided by (Used in) Operating Activities Loans held for sale Loans Held-for-sale, Fair Value Disclosure Number of Share Awards Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number of Shares [Roll Forward] Property Subject to or Available for Operating Lease, Gross Property Subject to or Available for Operating Lease, Gross Schedule of Available-for-sale Securities Reconciliation Schedule of Available-for-sale Securities Reconciliation [Table Text Block] Net interest income before provision for credit losses Net interest income before provision for loan losses Interest Income (Expense), Net Capital Required to be Well Capitalized to Risk Weighted Assets Capital Required for Capital Adequacy Trading Symbol Trading Symbol Nonmarketable Equity Securities Nonmarketable Equity Securities [Policy Text Block] Disclosure of accounting policy for Nonmarketable Equity Securities Internal Credit Assessment [Axis] Internal Credit Assessment [Axis] Finance Lease, Principal Payments Finance Lease, Principal Payments Loans and Leases Receivable, Net Amount Loans and Leases Receivable, Net Amount Purchased Credit Deteriorated [Policy Text Block] Purchased Credit Deteriorated [Policy Text Block] Purchased Credit Deteriorated [Policy Text Block] Income used in calculating diluted earnings per common share Net Income (Loss) Available to Common Stockholders, Diluted Investment securities Interest and Dividend Income, Securities, Operating Purchase of non-marketable equity securities Payments to Acquire Federal Home Loan Bank Stock Due after one year through five years, Amortized Cost Debt Securities, Available-for-sale, Maturity, Allocated and Single Maturity Date, after One Through Five Years, Amortized Cost Aggregate grant date fair value of shares vesting Aggregate grant date fair value of shares vesting Aggregate grant date fair value of shares vesting during the year Credit Score [Axis] Credit Score [Axis] Entity Shell Company Entity Shell Company Derivatives not designated as hedges Not Designated as Hedging Instrument [Member] Income Statement [Abstract] Income Statement [Abstract] Schedule of Direct or Sales Type Finance Leases [Abstract] Schedule of Direct or Sales Type Finance Leases [Abstract] Schedule of Direct or Sales Type Finance Leases [Abstract] Accrued Interest Receivable [Policy Text Block] Accrued Interest Receivable [Policy Text Block] Accrued Interest Receivable [Policy Text Block] deferred tax assets net unrealized loss on securities available for sale and cash flow hedges Deferred Tax Asset, Net Unrealized Loss on Securities Available for Sale Deferred Tax Asset, Net Unrealized Loss on Securities Available for Sale Entity by Location [Axis] Entity by Location [Axis] Entity Public Float Entity Public Float Assets Held-for-sale, Not Part of Disposal Group Assets Held-for-sale, Not Part of Disposal Group Document Type Document Type ICFR Auditor Attestation Flag ICFR Auditor Attestation Flag Net change in unrealized gains on securities available for sale, Before Tax Other Comprehensive Income (Loss), Securities, Available-for-sale, Adjustment, before Tax Other Comprehensive Income (Loss), Securities, Available-for-sale, Adjustment, before Tax Other Assets Other Assets [Member] Total non-interest income Noninterest Income Noninterest Income Finance Lease, Liability, Payments, Due Year Two Finance Lease, Liability, Payments, Due Year Two Investment securities held to maturity Debt Securities, Held-to-maturity Tier One Leverage Capital Required to be Well Capitalized to Average Assets Tier One Leverage Capital Required to be Well Capitalized to Average Assets Description of New Accounting Pronouncements Not yet Adopted [Text 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of Florida and other public funds deposits. New Accounting Pronouncements, Policy [Policy Text Block] New Accounting Pronouncements, Policy [Policy Text Block] Schedule of Capitalization, Long-term Debt [Line Items] Schedule of Capitalization, Long-term Debt [Line Items] Fair value of Interest rate derivative contracts cleared through the CME Interest rate derivative contracts centrally cleared through the CME Fair value of interest rate derivative contracts centrally cleared through the CME Financing Receivable Credit Quality Indicators Financing Receivable Credit Quality Indicators [Table Text Block] Maturing in Next Twelve Months - Over one month, Weighted Average Rate (in Percent) Maturing in Next Twelve Months - Over one month, Weighted Average Rate (in Percent) Maturing in Next Twelve Months - Over one month, Weighted Average Rate. Capital Leases, Net Investment in Direct Financing Leases, Initial Direct Costs Capital Leases, Net Investment in Direct Financing Leases, Initial Direct Costs Lending related commitments [Table] Lending related commitments [Table] Lending related commitments [Table] Net interest income after provision for credit losses Net interest income after provision for loan losses Interest Income (Expense), after Provision for Loan Loss Accrued Interest Receivable Accrued Interest Receivable [Member] Accrued Interest Receivable Weighted average shares for diluted earnings per common share Weighted Average Number of Shares Outstanding, Diluted Lessor, Leases Lessor, Leases [Policy Text Block] Gain (Loss) on Fair Value Hedge Ineffectiveness, Net Gain (Loss) on Fair Value Hedge Ineffectiveness, Net Sales-type and Direct Financing Leases, Lease Receivable, Payments to be Received, Four Years Sales-type and Direct Financing Leases, Lease Receivable, Payments to be Received, Four Years Off Balance Sheet [Member] Off Balance Sheet [Member] Off Balance Sheet [Member] Amounts reclassified to gain on investment securities available for sale, net, Before Tax Other Comprehensive Income (Loss), Reclassification Adjustment from AOCI for Sale of Securities, before Tax Other Comprehensive Income (Loss), Reclassification Adjustment from AOCI for Sale of Securities, before Tax Hedged Liability, Fair Value Hedge, Cumulative Increase (Decrease) Hedged Liability, Fair Value Hedge, Cumulative Increase (Decrease) Amortized Cost Available-for-sale Securities, Amortized Cost Basis Debt Securities, Available-for-sale [Line Items] Debt Securities, Available-for-sale [Line Items] Total assets Assets Assets Share-based Compensation Arrangements by Share-based Payment Award, Options, Exercises in Period, Weighted Average Exercise Price Share-based Compensation Arrangements by Share-based Payment Award, Options, Exercises in Period, Weighted Average Exercise Price Effective Income Tax Rate Reconciliation, Other Adjustments, Amount Effective Income Tax Rate Reconciliation, Other Adjustments, Amount Entity Address, State or Province Entity Address, State or Province Operating Lease, Liability Operating Lease, Liability Hedged Liability, Fair Value Hedge Hedged Liability, Fair Value Hedge Common Equity Tier One Risk Based Capital Required for Capital Adequacy to Risk Weighted Assets Common Equity Tier One Risk Based Capital Required for Capital Adequacy to Risk Weighted Assets Common Equity Tier One Risk Based Capital Required for Capital Adequacy to Risk Weighted Assets Disclosure of Share-based Compensation Arrangements by Share-based Payment Award [Table Text Block] Disclosure of Share-based Compensation Arrangements by Share-based Payment Award [Table Text Block] Schedule of Future Minimum Rental Payments for Operating Leases [Table Text Block] Schedule of Future Minimum Rental Payments for Operating Leases [Table Text Block] Non-interest bearing, average balance Non-interest bearing, average balance Average balance of domestic noninterest-bearing deposits held by the entity, which may include demand deposits, checking, brokered and retail deposits. 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Carrying Value of Hedged Item and Cumulative Fair Value Adjustments [Table Text Block] Derivative and Hedging Activities - Carrying Value of Hedged Item and Cumulative Fair Value Adjustments [Table Text Block] Derivative and Hedging Activities - Carrying Value of Hedged Item and Cumulative Fair Value Adjustments [Table Text Block] Schedule of Assets for Which Nonrecurring Changes in Fair Value have been Recorded Fair Value Measurements, Nonrecurring [Table Text Block] Share-based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Amount Share-based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Amount Residential Real Estate [Member] Residential Real Estate [Member] Transfer of Loans Held-for-sale to Portfolio Loans Transfer of Loans Held-for-sale to Portfolio Loans Time Time Deposits Time Deposits Time Deposits Unrecognized Tax Benefits, Increase Resulting from Current Period Tax Positions Unrecognized Tax Benefits, Increase Resulting from Current Period Tax Positions Senior Notes [Member] Senior Notes [Member] FLORIDA FLORIDA Increase (Decrease) in Other Operating Assets and Liabilities, Net Increase (Decrease) in Other Operating Assets and Liabilities, Net Computation of Basic and Diluted Earnings Per Common Share Schedule of Earnings Per Share, Basic and Diluted [Table Text Block] Derivatives and Hedging Activities Derivative Instruments and Hedging Activities Disclosure [Text Block] Additions to Federal Home Loan Bank advances Proceeds from FHLBank Borrowings, Financing Activities Deferred Tax Assets, Other Deferred Tax Assets, Other Number of securities in unrealized loss positions (in Securities) Available-for-sale, Securities in Unrealized Loss Positions, Qualitative Disclosure, Number of Positions Entity File Number Entity File Number Gross realized gains: Available-for-sale Securities, Gross Realized Gains Financing Receivable, Troubled Debt Restructuring Financing Receivable, Troubled Debt Restructuring [Table Text Block] schedule of interest expense on deposits schedule of interest expense on deposits schedule of interest expense on deposits Income Taxes Income Tax Disclosure [Text Block] Operating and Finance Lease Information [Table Text Block] Operating and Finance Lease Information [Table Text Block] [Table Text Block] for Operating and Finance Lease Information [Table] Original Loan to Value [Axis] Debt-to-Value [Axis] Commercial real estate, Owner occupied Commercial Real Estate Owner Occupied [Member] Commercial Real Estate Owner Occupied [Member] [Member] SEC Schedule, 12-04, Cash Dividends Paid to Registrant, Consolidated Subsidiaries SEC Schedule, 12-04, Cash Dividends Paid to Registrant, Consolidated Subsidiaries Financial Asset Acquired with Credit Deterioration [Member] Financial Asset Acquired with Credit Deterioration [Member] Substandard Substandard Accruing [Member] Substandard Accruing [Member] Doubtful [Member] Doubtful [Member] Document Annual Report Document Annual Report Fair Value Measurement, Policy Fair Value Measurement, Policy [Policy Text Block] Derivative Instruments, Loss Reclassified from Accumulated OCI into Income, Effective Portion Derivative Instruments, Loss Reclassified from Accumulated OCI into Income, Effective Portion Operating Leases, Future Minimum Payments Receivable, Thereafter Operating Leases, Future Minimum Payments Receivable, Thereafter Premises and Equipment and Lease Commitments [Abstract] Premises and Equipment and Lease Commitments [Abstract] Type of Adoption [Domain] Type of Adoption [Domain] Gross Amounts Not Offset in Balance Sheet Derivative Asset, Fair Value, Amount Not Offset Against Collateral [Abstract] UPB, Total Impaired Financing Receivable, Unpaid Principal Balance Transfers and Servicing of Financial Assets, Servicing of Financial Assets, Policy Transfers and Servicing of Financial Assets, Servicing of Financial Assets, Policy [Policy Text Block] Derivative Instruments, Derivative assets and liabilities Derivative Asset (Liability), Fair Value, Gross Liability (Asset) Derivative Asset (Liability), Fair Value, Gross Liability (Asset) Loans Insured or Guaranteed by Government Authorities [Domain] Loans Insured or Guaranteed by Government Authorities [Domain] Lessee, Operating Lease, Liability, Payments, Due Year Five Lessee, Operating Lease, Liability, Payments, Due Year Five closing price on date of grant closing price on date of grant (in Dollars per Share) closing price on date of grant. Interest Receivable Interest Receivable Financing Receivable, Past Due Financing Receivable, Past Due RSU and PSU Awards [Member] RSU and PSU Awards [Member] RSU and PSU Awards [Member] Software and CCA Software and CCA [Table Text Block] [Table Text Block] for Software and CCA [Table] Capital to Risk Weighted Assets Capital to Risk Weighted Assets Paid-in Capital Additional Paid-in Capital [Member] Commercial Commercial Portfolio Segment [Member] Commercial Portfolio Segment [Member] Equity based compensation (in Shares) Shares Issued, Shares, Share-based Payment Arrangement, before Forfeiture Interest Expense, Domestic Deposits Interest Expense, Domestic Deposits Finance Lease, Weighted Average Remaining Lease Term Finance Lease, Weighted Average Remaining Lease Term Proceeds from Sale of Machinery and Equipment Proceeds from Sale of Machinery and Equipment Operating Leases, Future Minimum Payments Receivable, Current Operating Leases, Future Minimum Payments Receivable, Current Interest-bearing Domestic Deposit, Brokered Interest-bearing Domestic Deposit, Brokered Share-based Payment Arrangement Share-based Payment Arrangement [Policy Text Block] Notes Payable Notes Payable Fair Value Measurement [Domain] Fair Value Measurement [Domain] Commercial Real Estate Portfolio Segment [Member] Commercial Real Estate Portfolio Segment [Member] Due after ten years, Fair Value Debt Securities, Available-for-sale, Maturity, Allocated and Single Maturity Date, after 10 Years, Fair Value Debt Instrument, Interest Rate, Stated Percentage Debt Instrument, Interest Rate, Stated Percentage Common Equity Tier One Risk Based Capital Common Equity Tier One Capital 2014 Plan 2014 Plan [Member] 2014 Plan [Member] Schedule of Unrecognized Tax Benefits Roll Forward [Table Text Block] Schedule of Unrecognized Tax Benefits Roll Forward [Table Text Block] Financing Receivable, before Allowance for Credit Loss Financing Receivable, before Allowance for Credit Loss Entity Tax Identification Number Entity Tax Identification Number Summary of Significant Accounting Policies [Table] Summary of Significant Accounting Policies [Table] Summary of Significant Accounting Policies [Table] Income Statement Location [Axis] Income Statement Location [Axis] Financial and Nonfinancial Liabilities, Fair Value Disclosure Financial and Nonfinancial Liabilities, Fair Value Disclosure Investments Classified by Contractual Maturity Date Investments Classified by Contractual Maturity Date [Table Text Block] Financing Receivable, Not Past Due Financing Receivable, Not Past Due Class of Financing Receivable [Axis] Financing Receivable Recorded Investment by Class of Financing Receivable [Axis] Class of Financing Receivable [Axis] Financial Asset, Current [Member] Financial Asset, Current [Member] Financial Asset, Current [Member] Current Fiscal Year End Date Current Fiscal Year End Date Finance Lease, Liability, Payments, Due Year Three Finance Lease, Liability, Payments, Due Year Three FRB net reserve requirement FRB net reserve requirement FRB net reserve requirement. Deferred Compensation Plan Deferred Compensation Plan [Member] Deferred Compensation Plan [Member] Finance Lease, Right-of-Use Asset Finance Lease, Right-of-Use Asset Operating Lease, Liability, Statement of Financial Position [Extensible List] Operating Lease, Liability, Statement of Financial Position [Extensible List] Forfeiture of unvested shares (in Shares) Shares Issued, Shares, Share-based Payment Arrangement, Forfeited NEW YORK STOCK EXCHANGE, INC. [Member] NEW YORK STOCK EXCHANGE, INC. [Member] Unrecognized Tax Benefits, Reduction Resulting from Lapse of Applicable Statute of Limitations Unrecognized Tax Benefits, Reduction Resulting from Lapse of Applicable Statute of Limitations Asset Impairment Charges Asset Impairment Charges Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value Notes and other borrowings Long-term Debt and Lease Obligation Long-term Debt and Lease Obligation Initial Application Period Cumulative Effect Transition [Domain] Initial Application Period Cumulative Effect Transition [Domain] Equity in earnings of subsidiaries Equity in earnings of subsidiaries Equity in earnings of subsidiaries. Financing Receivable, Troubled Debt Restructuring, Subsequent Default Financing Receivable, Troubled Debt Restructuring, Subsequent Default November November [Member] November Financing Receivable, Troubled Debt Restructuring [Table] Financing Receivable, Troubled Debt Restructuring [Table] Capital conservation buffer required for Common equity tier one ratio Capital conservation buffer required for Common equity tier one ratio Capital conservation buffer required for Common equity tier one ratio Distributed and undistributed earnings allocated to participating securities Participating Securities, Distributed and Undistributed Earnings (Loss), Basic Charge-offs Allowance for Loan and Lease Losses, Write-offs Loan Origination Commitments [Member] Loan Origination Commitments [Member] Earnings Per Common Share Earnings Per Share [Text Block] Interest rate derivative assets, fair value Interest Rate Derivative Assets, at Fair Value Finance Lease, Right-of-Use Asset, Amortization Finance Lease, Right-of-Use Asset, Amortization Award Type [Domain] Award Type [Domain] Pledged Financial Instruments, Not Separately Reported, Securities for Federal Home Loan Bank Pledged Financial Instruments, Not Separately Reported, Securities for Federal Home Loan Bank Financing Receivable, Nonaccrual Financing Receivable, Nonaccrual Finance Lease, Liability Finance Lease, Liability Schedule of Collateral Dependent Loans Schedule of Collateral Dependent Loans [Table Text Block] Schedule of Collateral Dependent Loans [Table Text Block] Sales-type and Direct Financing Leases, Lease Receivable, Payments to be Received, Five Years Sales-type and Direct Financing Leases, Lease Receivable, Payments to be Received, Five Years Decrease in Unrecognized Tax Benefits is Reasonably Possible Decrease in Unrecognized Tax Benefits is Reasonably Possible Hedging Designation [Axis] Hedging Designation [Axis] Dividends paid Payments of Ordinary Dividends, Common Stock Restricted Stock Units (RSUs) [Member] Restricted Stock Units (RSUs) [Member] Goodwill and Intangible Assets, Policy Goodwill and Intangible Assets, Policy [Policy Text Block] Effective Income Tax Rate Reconciliation, Percent Effective Income Tax Rate Reconciliation, Percent Schedule of Components of Income Tax Expense (Benefit) [Table Text Block] Schedule of Components of Income Tax Expense (Benefit) [Table Text Block] Total liabilities Liabilities Liabilities Condensed Financial Statements Condensed Financial Statements [Text Block] Range of the closing price on date of grant, minimum (in Dollars per Share) Range of the closing price on date of grant, minimum (in Dollars per Share) Range of the closing price on date of grant, minimum. Reclassification, Policy Reclassification, Policy [Policy Text Block] Proceeds from repayments and calls of investment securities Proceeds from Maturities, Prepayments and Calls of Debt Securities, Available-for-sale Common Equity Tier One Risk Based Capital to Risk Weighted Assets Common Equity Tier One Capital Ratio Share-based Compensation Arrangement by Share-based Payment Award, Options, Forfeitures and Expirations in Period, Weighted Average Exercise Price Share-based Compensation Arrangement by Share-based Payment Award, Options, Forfeitures and Expirations in Period, Weighted Average Exercise Price Statement of Comprehensive Income [Abstract] Statement of Comprehensive Income [Abstract] Tier One Leverage Capital Required to be Well Capitalized Tier One Leverage Capital Required to be Well Capitalized Financial Asset, Period Past Due [Axis] Financial Asset, Period Past Due [Axis] Document Information [Line Items] Document Information [Line Items] Total Right of Use Asset Total Right of Use Asset Total Right of Use Asset Unvested and restricted share awards [Member] Unvested and restricted share awards [Member] Denominator: Weighted Average Number of Shares Outstanding, Basic [Abstract] Schedule of Federal Home Loan Bank Advances, by Branch of FHLB Bank [Table] Schedule of Federal Home Loan Bank Advances, by Branch of FHLB Bank [Table] Collateral [Domain] Collateral [Domain] Substandard Non-Accruing Substandard Non-Accruing [Member] Substandard Non-Accruing Residential and Other Consumer Residential Portfolio Segment [Member] Residential Portfolio Segment [Member] Entity Well-known Seasoned Issuer Entity Well-known Seasoned Issuer Total expense Total expense Represents total expense which is attributable to the parent. Maturing in Next Twelve Months - Over one month Maturing in Next Twelve Months - Over one month Amount of federal home loan bank advances maturing in the next fiscal year, after the first 31 days. Operating lease liabilities recognized from obtaining ROU assets Operating lease liabilities recognized from obtaining ROU assets Operating lease liabilities recognized from obtaining ROU assets Weighted Average Grant Date Fair Value Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value [Abstract] Finance Lease, Liability, Statement of Financial Position [Extensible List] Finance Lease, Liability, Statement of Financial Position [Extensible List] Variable Interest Entity, Reporting Entity Involvement, Maximum Loss Exposure, Amount Variable Interest Entity, Reporting Entity Involvement, Maximum Loss Exposure, Amount Total stockholders' equity Stockholders' equity Stockholders' Equity Attributable to Parent BankUnited [Member] BankUnited [Member] Increase (decrease) in other liabilities Increase (Decrease) in Other Operating Liabilities interest rate caps purchased, indexed to fed funds effective rate interest rate caps purchased, indexed to fed funds effective rate [Member] interest rate caps purchased, indexed to fed funds effective rate Capital required under capital conservation buffer Capital required under capital conservation buffer Capital required under capital conservation buffer Local Phone Number Local Phone Number Finance Lease, Right-of-Use Asset, Statement of Financial Position [Extensible List] Finance Lease, Right-of-Use Asset, Statement of Financial Position [Extensible List] Interest income: Interest and Dividend Income, Operating [Abstract] Equity based compensation Shares Issued, Value, Share-based Payment Arrangement, before Forfeiture Unrecognized Tax Benefits, Income Tax Penalties and Interest Expense Unrecognized Tax Benefits, Income Tax Penalties and Interest Expense U.S. Government agency and sponsored enterprise residential MBS US Government agency and sponsored enterprise residential mortgage-backed securities [Member] US Government agency and sponsored enterprise residential mortgage-backed securities [Member] Other Expenses Other Expenses Fair Value Measurements Fair Value Disclosures [Text Block] Accumulated Gain (Loss), Net, Cash Flow Hedge, Parent [Member] Accumulated Gain (Loss), Net, Cash Flow Hedge, Parent [Member] Capital conservation buffer required for tier one risk based ratio Capital conservation buffer required for tier one risk based ratio Capital conservation buffer required for tier one risk based ratio Interest paid Interest Paid, Excluding Capitalized Interest, Operating Activities Total interest income Interest and Dividend Income, Operating Interest and Dividend Income, Operating Qualified Affordable Housing Project Investments, Commitment Qualified Affordable Housing Project Investments, Commitment Weighted Average Rate Domestic Deposit, Time Deposits Weighted Average Rate Domestic Deposit, Time Deposits Summary of Significant Accounting Policies [Line Items] Summary of Significant Accounting Policies [Line Items] [Line Items] for Summary of Significant Accounting Policies [Table] Potentially dilutive securities outstanding (in Shares) Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount Interest and Dividend Income - Investment securities Interest and Dividend Income, Securities, Operating, Available-for-sale Long-term Debt, Type [Axis] Long-term Debt, Type [Axis] Reclassification out of Accumulated Other Comprehensive Income [Axis] Reclassification out of Accumulated Other Comprehensive Income [Axis] Loans and Leases Receivable, Nonperforming, Nonaccrual of Interest Loans and Leases Receivable, Nonperforming, Nonaccrual of Interest Equity Component [Domain] Equity Component [Domain] Internal Credit Assessment [Domain] Internal Credit Assessment [Domain] Equipment [Member] Equipment [Member] Consolidated Entities [Domain] Consolidated Entities [Domain] Deferred Tax Assets, Gross Deferred Tax Assets, Gross Operating Leases, Future Minimum Payments Receivable, in Three Years Operating Leases, Future Minimum Payments Receivable, in Three Years Sales-type and Direct Financing Leases, Lease Receivable, Payments to be Received, Thereafter Sales-type and Direct Financing Leases, Lease Receivable, Payments to be Received, Thereafter Financing Receivable, Troubled Debt Restructuring [Line Items] Financing Receivable, Troubled Debt Restructuring [Line Items] Financing Receivable Impaired [Line Items] Financing Receivable, Impaired [Line Items] Condensed Balance Sheet [Table Text Block] Condensed Balance Sheet [Table Text Block] Tier One Risk Based Capital Required to be Well Capitalized Tier One Risk Based Capital Required to be Well Capitalized Deferred Compensation Arrangement with Individual, Cash Awards Granted, Percentage Deferred Compensation Arrangement with Individual, Cash Awards Granted, Percentage Interest rate derivative liabilities, fair value Interest Rate Derivative Liabilities, at Fair Value Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward] AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward] Gross Amounts Recognized, Derivative assets Derivative Asset, Fair Value, Gross Asset Balance Sheet Location [Axis] Balance Sheet Location [Axis]