Transfers and Servicing [Abstract] Securities Sold Under Agreements to Repurchase Transfers and Servicing of Financial Assets [Abstract] Repurchase Agreements Securities Sold under Agreements to Repurchase, Gross Including Not Subject to Master Netting Arrangement Securities Pledged for Repurchase Agreements Pledged Financial Instruments, Not Separately Reported, Securities for Repurchase Agreements Receivables [Abstract] Schedule of Financing Receivable, Allowance for Credit Losses [Table] Schedule of Financing Receivable, Allowance for Credit Losses [Table] Financing Receivable Portfolio Segment [Axis] Financing Receivable Portfolio Segment [Axis] Financing Receivable Portfolio Segment [Domain] Financing Receivable Portfolio Segment [Domain] Residential Real Estate Residential Portfolio Segment [Member] Commercial Commercial Portfolio Segment [Member] Consumer and Other Consumer Portfolio Segment [Member] Class of Financing Receivable [Axis] Class of Financing Receivable, Type [Axis] Class of Financing Receivable [Domain] Class of Financing Receivable, Type [Domain] Residential Real Estate Residential Real Estate [Member] Commercial Real Estate Commercial Real Estate [Member] Other Commercial Commercial Loan [Member] Home Equity Home Equity Home Equity Line of Credit [Member] Loan based on the equity of the borrower's residential property. Includes close-ended loans in which the borrower receives the loan amount upfront and revolving, open-ended loans under a line of credit. Other Consumer Consumer Loan [Member] Financing Receivable, Allowance for Credit Losses [Line Items] Financing Receivable, Allowance for Credit Losses [Line Items] Allowance for loan and lease losses Financing Receivable, Allowance for Credit Losses [Roll Forward] Balance at beginning of period Financing Receivable, Allowance for Credit Losses Provision for loan losses Provision for Loan, Lease, and Other Losses Charge-offs Financing Receivable, Allowance for Credit Losses, Write-downs Recoveries Financing Receivable, Allowance for Credit Losses, Recovery Balance at end of period Equity [Abstract] Accumulated Other Comprehensive Income (Loss) Comprehensive Income (Loss) Note [Text Block] Document and Entity Information [Abstract] Document and entity information. Entity Registrant Name Entity Registrant Name Trading Symbol Trading Symbol Entity Central Index Key Entity Central Index Key Document Type Document Type Document Period End Date Document Period End Date Amendment Flag Amendment Flag Document Fiscal Year Focus Document Fiscal Year Focus Document Fiscal Period Focus Document Fiscal Period Focus Current Fiscal Year End Date Current Fiscal Year End Date Entity Filer Category Entity Filer Category Entity Emerging Growth Company Entity Emerging Growth Company Entity Small Business Entity Small Business Entity Common Stock, Shares Outstanding Entity Common Stock, Shares Outstanding Organization, Consolidation and Presentation of Financial Statements [Abstract] General Business Description and Basis of Presentation [Text Block] Principles of Consolidation Consolidation, Policy [Policy Text Block] Loans Receivable Finance, Loans and Leases Receivable, Policy [Policy Text Block] Allowance for Loan and Lease Losses Loans and Leases Receivable, Allowance for Loan Losses Policy [Policy Text Block] Lessee Leases Lessee, Leases [Policy Text Block] Lessor Leases Lessor, Leases [Policy Text Block] Revenue Recognition Revenue Recognition, Policy [Policy Text Block] Accounting Guidance Adopted in 2019 and Pending Adoption at March 31, 2019 New Accounting Pronouncements, Policy [Policy Text Block] Goodwill and Intangible Assets Disclosure [Abstract] Goodwill Goodwill and Intangible Assets Disclosure [Text Block] Investments, Debt and Equity Securities [Abstract] Gain or loss on sale of investments Gain (Loss) on Investments [Abstract] Available-for-sale Debt Securities, Available-for-sale, Realized Gain (Loss) [Abstract] Sales of available-for-sale debt securities Proceeds from Sales and Calls of Debt Securities, Available-for-sale Proceeds from Sales and Calls of Debt Securities, Available-for-sale Gross realized gains Available-for-sale Securities, Gross Realized Gains Gross realized losses Available-for-sale Securities, Gross Realized Losses Held-to-maturity Debt Securities, Held-to-maturity, Sale or Transfer of Investment [Abstract] Proceeds from calls of debt securities Held-to-Maturity Securities, Gross Realized Gains (Losses), Sale Proceeds The total amount of proceeds received for the sale of securities categorized as held-to-maturity during the reporting period. The sale of held-to-maturity securities includes proceeds from maturities, prepayments and calls. Gross realized gains Held-to-Maturity Securities, Sold Security, Realized Gain This item represents the gain realized on the sale of held-to-maturity securities disposed of during the period. Gross realized losses Held-to-Maturity Securities, Sold Security, Realized Loss This item represents the loss realized on the sale of held-to-maturity securities disposed of during the period. Additionally, this item may include, if not separately presented, any losses recognized for other than temporary impairments (OTTI) of the subject investments in debt securities which are being or have been recognized in earnings during the period. Earnings Per Share [Abstract] Basic and Diluted Earnings Per Share Earnings Per Share Reconciliation [Abstract] Net income available to common stockholders, basic and diluted Net Income (Loss) Attributable to Parent Average outstanding shares - basic Weighted Average Number of Shares Outstanding, Basic Add: dilutive restricted stock awards and stock options Incremental Common Shares Attributable to Dilutive Effect of Share-based Payment Arrangements Average outstanding shares - diluted Weighted Average Number of Shares Outstanding, Diluted Basic earnings per share Earnings Per Share, Basic Diluted earnings per share Earnings Per Share, Diluted Earnings Per Share Earnings Per Share, Diluted, Other Disclosures [Abstract] Restricted stock awards and stock options excluded from the diluted average outstanding share calculation Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount Income Statement [Abstract] Interest Income Interest and Dividend Income, Operating [Abstract] Investment securities Interest and Dividend Income, Securities, Operating Residential real estate loans Interest and Fee Income, Loans, Consumer, Real Estate Commercial loans Interest and Fee Income, Loans, Commercial Consumer and other loans Interest and Fee Income, Loans, Other Consumer Total interest income Interest and Dividend Income, Operating Interest Expense Interest Expense [Abstract] Deposits Interest Expense, Deposits Securities sold under agreements to repurchase Interest Expense, Securities Sold under Agreements to Repurchase Federal Home Loan Bank advances Interest Expense Federal Home Loan Bank Advance Interest expense federal home loan bank advance. Other borrowed funds Interest Expense, Other Subordinated debentures Interest Expense, Junior Subordinated Debentures Total interest expense Interest Expense Net Interest Income Interest Income (Expense), Net Provision for loan losses Net interest income after provision for loan losses Interest Income (Expense), after Provision for Loan Loss Non-Interest Income Noninterest Income [Abstract] Service charges and other fees Service Charges and Other Fees Service Charges and Other Fees on Deposit Accounts. Miscellaneous loan fees and charges Miscellaneous Loan Fees and Charges Miscellaneous loan fees and charges on residential real estate, commercial, agriculture, and consumer loans. Gain on sale of loans Gain (Loss) on Sales of Loans, Net Gain (loss) on sale of debt securities Debt Securities, Realized Gain (Loss) Other income Noninterest Income, Other Operating Income Total non-interest income Noninterest Income Non-Interest Expense Noninterest Expense [Abstract] Compensation and employee benefits Labor and Related Expense Occupancy and equipment Occupancy, Net Advertising and promotions Advertising Expense Data processing Information Technology and Data Processing Other real estate owned Foreclosed Real Estate Expense Regulatory assessments and insurance General Insurance and Federal Deposit Insurance Corporation Premium Expense The expense in the period incurred with respect to protection provided by insurance entities against risks other than risks associated with production, including the amount of expense for Federal Deposit Insurance Corporation (FDIC) insurance. Core deposit intangibles amortization Amortization of Intangible Assets Other expenses Other Noninterest Expense Total non-interest expense Noninterest Expense Income Before Income Taxes Income (Loss) from Continuing Operations before Equity Method Investments, Income Taxes, Noncontrolling Interest Federal and state income tax expense Income Tax Expense (Benefit) Net Income Dividends declared per share Common Stock, Dividends, Per Share, Declared Average outstanding shares - diluted Accumulated impairment charge Goodwill, Impaired, Accumulated Impairment Loss Subsequent Events [Abstract] Subsequent Event [Table] Subsequent Event [Table] Subsequent Event Type [Axis] Subsequent Event Type [Axis] Subsequent Event Type [Domain] Subsequent Event Type [Domain] Subsequent Event Subsequent Event [Member] Subsequent Event Subsequent Event [Line Items] Subsequent Event, Description Subsequent Event, Description Total assets Assets Gross loans Loans and Leases Receivable, Net of Deferred Income Total deposits Deposits Other Expenses [Abstract] Other Expenses Other Income and Expenses [Abstract] Debit card expenses Debit Card Expense Debit card expense. Consulting and outside services Consulting Fees Consulting fees other than legal and accounting fees. Telephone Telephone Expenses Telephone expenses Employee expenses Miscellaneous Employee Expenses Miscellaneous employee expenses other than compensation and benefits. Business development Business Development Loan expenses Loan-Related Expenses Loan-related expenses. Postage Postage Expense Printing and supplies Supplies Expense VIE amortization and other expenses VIE Write-downs, Losses and Other Expenses Write-downs, Losses and Other Expenses related to Variable Interest Entities. ATM expenses ATM Expenses ATM Expenses Accounting and audit fees Accounting Fees Accounting Fees Checking and operating expenses Deposit-Related Expenses Deposit related expenses other than interest expense. Legal fees Legal Fees Mergers and acquisition expenses Business Combination, Integration Related Costs Other Other Cost and Expense, Operating Total other expenses Schedule of Impaired Financing Receivable [Table] Schedule of Impaired Financing Receivable [Table] Financing Receivable, Impaired [Line Items] Financing Receivable, Impaired [Line Items] Summary of the impaired loans by portfolio class of loans Summary of Impaired Loans by Portfolio Class of Loans [Abstract] Summary of the impaired loans by portfolio class of loans. Loans with a specific valuation allowance, Recorded balance Impaired Financing Receivable, with Related Allowance, Recorded Investment Loans with a specific valuation allowance, Unpaid principal balance Impaired Financing Receivable, with Related Allowance, Unpaid Principal Balance Specific valuation allowance Impaired Financing Receivable, Related Allowance Loans with a specific valuation allowance, Average balance Impaired Financing Receivable, with Related Allowance, Average Recorded Investment Loans without a specific valuation allowance, Recorded balance Impaired Financing Receivable, with No Related Allowance, Recorded Investment Loans without a specific valuation allowance, Unpaid principal balance Impaired Financing Receivable, with No Related Allowance, Unpaid Principal Balance Loans without a specific valuation allowance, Average balance Impaired Financing Receivable, with No Related Allowance, Average Recorded Investment Recorded balance Impaired Financing Receivable, Recorded Investment Unpaid principal balance Impaired Financing Receivable, Unpaid Principal Balance Average balance Impaired Financing Receivable, Average Recorded Investment Loans Receivable, Net Financing Receivables [Text Block] Equity Method Investments and Joint Ventures [Abstract] Carrying amounts of consolidated VIEs' assets and liabilities Schedule of Variable Interest Entities [Table Text Block] Amortization expense and tax credits and other tax benefits recognized for qualified affordable housing project investments Equity Method Investments [Table Text Block] Fair Value Disclosures [Abstract] Fair value measurement transfers from one level to another Fair Value Measurement Transfers From One Level To Another Fair Value Measurement Transfers From One Level To Another Fair Value Option, Disclosures [Table] Fair Value Option, Disclosures [Table] Financial Instrument [Axis] Financial Instrument [Axis] Financial Instruments [Domain] Financial Instruments [Domain] Loans Held For Sale Loans Held For Sale [Member] This item represents loans held-for-sale including, but not limited to, mortgage loans and finance receivables. Income Statement Location [Axis] Income Statement Location [Axis] Income Statement Location [Domain] Income Statement Location [Domain] Gain on sale of loans Gain (Loss) on Sale of Loans [Member] Primary financial statement caption encompassing gain (loss) on sale of loans. Fair Value, Option, Quantitative Disclosures Fair Value, Option, Quantitative Disclosures [Line Items] Changes in fair value, gain (loss) Fair Value, Option, Changes in Fair Value, Gain (Loss) Derivative Instruments and Hedging Activities Disclosure [Abstract] Derivative Instruments, Gain (Loss) [Table] Derivative Instruments, Gain (Loss) [Table] Derivative Instrument [Axis] Derivative Instrument [Axis] Derivative, Name [Domain] Derivative Contract [Domain] Interest Rate Swaps Interest Rate Swap [Member] Other Comprehensive Income Location [Axis] Other Comprehensive Income Location [Axis] Other Comprehensive Income Location [Domain] Other Comprehensive Income Location [Domain] Other Comprehensive Income Other Comprehensive Income (Loss) [Member] Interest Expense Interest Expense [Member] Pre-Tax Gains or Losses Derivative Instruments, Gain (Loss) [Line Items] Amount of (loss) gain recognized in OCI Other Comprehensive Income (Loss), Unrealized Gain (Loss) on Derivatives Arising During Period, before Tax Amount of loss reclassified from OCI to interest expense Derivative Instruments, Gain (Loss) Reclassified from Accumulated OCI into Income, Effective Portion, Net Stockholders' Equity Note [Abstract] Stockholders' Equity Note [Abstract] Accumulated Other Comprehensive Loss [Table] Accumulated Other Comprehensive Income (Loss) [Table] Statement, Equity Components [Axis] Equity Components [Axis] Equity Component [Domain] Equity Component [Domain] Available-For-Sale Debt Securities Accumulated Net Investment Gain (Loss) Attributable to Parent [Member] Derivatives Used for Cash Flow Hedges Accumulated Net Gain (Loss) from Cash Flow Hedges Attributable to Parent [Member] Accumulated Other Comprehensive Loss Accumulated Other Comprehensive Income (Loss) [Line Items] Balance, beginning Accumulated Other Comprehensive Income (Loss), Net of Tax Other comprehensive income (loss) before reclassification Other Comprehensive Income (Loss), before Reclassifications, Net of Tax Reclassification adjustments for (gains) losses included in net income Reclassification from Accumulated Other Comprehensive Income, Current Period, Net of Tax Total other comprehensive income (loss), net of tax Other Comprehensive Income (Loss), Net of Tax Balance, end Statement of Financial Position [Abstract] Assets Assets [Abstract] Cash on hand and in banks Cash and Due from Banks Federal funds sold Federal Funds Sold Interest bearing cash deposits Interest-bearing Deposits in Banks and Other Financial Institutions Cash and cash equivalents Cash, Cash Equivalents, and Federal Funds Sold Debt securities, available-for-sale Debt Securities, Available-for-sale Debt securities, held-to-maturity Debt Securities, Held-to-maturity Total debt securities Debt Securities Loans held for sale, at fair value Loans Receivable Held-for-sale, Net, Not Part of Disposal Group Loans receivable Allowance for loan and lease losses Loans and Leases Receivable, Allowance Loans receivable, net Loans and Leases Receivable, Net Amount Premises and equipment, net Property, Plant and Equipment, Net Other real estate owned Other Real Estate, Foreclosed Assets, and Repossessed Assets Accrued interest receivable Interest Receivable Deferred tax asset Deferred Income Tax Assets, Net Core deposit intangible, net Finite-Lived Intangible Assets, Net Goodwill Goodwill Non-marketable equity securities Nonmarketable Securities Equity Securities Non marketable securities, equity securities. Bank-owned life insurance Bank Owned Life Insurance Other assets Other Assets Total assets Liabilities Liabilities [Abstract] Non-interest bearing deposits Noninterest-bearing Deposit Liabilities Interest bearing deposits Interest-bearing Deposit Liabilities Securities sold under agreements to repurchase Securities Sold under Agreements to Repurchase Federal Home Loan Bank advances Advances from Federal Home Loan Banks Other borrowed funds Other Borrowings Subordinated debentures Subordinated Debt Accrued interest payable Interest Payable Other liabilities Other Liabilities Total liabilities Liabilities Stockholders' Equity Stockholders' Equity Attributable to Parent [Abstract] Preferred shares, $0.01 par value per share, 1,000,000 shares authorized, none issued or outstanding Preferred Stock, Value, Issued Common stock, $0.01 par value per share, 117,187,500 shares authorized Common Stock, Value, Outstanding Paid-in capital Additional Paid in Capital, Common Stock Retained earnings - substantially restricted Retained Earnings (Accumulated Deficit) Accumulated other comprehensive income (loss) Total stockholders' equity Stockholders' Equity Attributable to Parent Total liabilities and stockholders' equity Liabilities and Equity Number of common stock shares issued and outstanding Common Stock, Shares, Outstanding Other-than-temporary impairment on debt securities Other than Temporary Impairment Losses, Investments Activity within Accumulated Other Comprehensive Income (Loss), Net of Tax Schedule of Accumulated Other Comprehensive Income (Loss) [Table Text Block] Derivatives and Hedging Activities Derivative Instruments and Hedging Activities Disclosure [Text Block] Schedule of Equity Method Investments [Table] Schedule of Equity Method Investments [Table] Variable Interest Entities [Axis] Variable Interest Entities [Axis] Variable Interest Entity, Classification [Domain] Variable Interest Entity, Classification [Domain] CDE Certified Development Entities [Member] Certified development entities. LIHTC low Income Housing Tax Credit [Member] Low-income housing tax credit. Balance Sheet Location [Axis] Balance Sheet Location [Axis] Balance Sheet Location [Domain] Balance Sheet Location [Domain] Other assets Other Noncurrent Assets [Member] Variable Interest Entities Schedule of Equity Method Investments [Line Items] Tax credit period Tax Credit Period The period in which an investor receives tax credits from a tax credit project. Carrying value of equity investments in LIHTCs Amortization Method Qualified Affordable Housing Project Investments Tax credit compliance period Tax Credit Compliance Period The period in which a tax credit project must stay in compliance for the investor to keep the tax credits. Unfunded contingent commitments Qualified Affordable Housing Project Investments, Commitment Impairment losses Affordable Housing Project Investment, Write-down, Amount Fair Value Measurement Inputs and Valuation Techniques [Table] Fair Value Measurement Inputs and Valuation Techniques [Table] Fair Value by Measurement Frequency [Axis] Measurement Frequency [Axis] Fair Value, Measurement Frequency [Domain] Fair Value, Measurement Frequency [Domain] Non-Recurring Measurements Fair Value, Measurements, Nonrecurring [Member] Fair Value Hierarchy and NAV [Axis] Fair Value Hierarchy and NAV [Axis] Fair Value, Measurements, Fair Value Hierarchy [Domain] Fair Value Hierarchy and NAV [Domain] Level 3 Fair Value, Inputs, Level 3 [Member] Range [Axis] Range [Axis] Range [Domain] Range [Domain] Minimum Range Minimum [Member] Maximum Range Maximum [Member] Weighted Average Range Weighted Average [Member] Valuation Approach and Technique [Axis] Valuation Approach and Technique [Axis] Valuation Approach and Technique [Domain] Valuation Approach and Technique [Domain] Sales Comparison Approach Valuation, Market Approach [Member] Combined Approach Combined Approach Valuation Technique [Member] Combined Approach [Member] Measurement Input Type [Axis] Measurement Input Type [Axis] Measurement Input Type [Domain] Measurement Input Type [Domain] Selling costs Measurement Input, Cost to Sell [Member] Quantitative Information About Level 3 Fair Value Measurements Fair Value Measurement Inputs and Valuation Techniques [Line Items] Other real estate owned Other Real Estate Owned Fair Value Disclosure Other real estate owned fair value disclosure. Other real estate owned Other Real Estate Owned, Measurement Input Collateral-dependent impaired loans, net of ALLL Collateral Dependent Impaired Loans Owned Fair Value Disclosure Collateral dependent impaired loans owned fair value disclosure. Collateral-dependent impaired loans, net of ALLL Impaired Loans, Measurement Input Value of input used to measure impaired loans. Earnings Per Share Earnings Per Share [Text Block] Variable Interest Entities Variable Interest Entity Disclosure [Text Block] Schedule of Other Expenses Schedule of Other Operating Cost and Expense, by Component [Table Text Block] Schedule of Variable Interest Entities [Table] Schedule of Variable Interest Entities [Table] Consolidated VIEs Variable Interest Entity, Primary Beneficiary [Member] Loans Receivable Loans Receivable [Member] Accrued Interest Receivable Accrued Interest Receivable [Member] Primary financial statement caption encompassing accrued interest receivable. Other assets Prepaid Expenses and Other Current Assets [Member] Other borrowed funds Borrowings [Member] Accrued interest payable Accrued Interest Payable [Member] Primary financial statement caption encompassing accrued interest payable. Other liabilities Accounts Payable and Accrued Liabilities [Member] Consolidated VIEs Variable Interest Entity [Line Items] Assets Variable Interest Entity, Consolidated, Carrying Amount, Assets Liabilities Variable Interest Entity, Consolidated, Carrying Amount, Liabilities Offsetting [Abstract] Offsetting Assets [Table] Offsetting Assets [Table] Offsetting Assets [Line Items] Offsetting Assets [Line Items] Offsetting Derivative Assets Offsetting Derivative Assets [Abstract] Gross Amounts of Recognized Assets Derivative Asset, Fair Value, Gross Asset Gross Amounts Offset in the Statements of Financial Position Derivative Asset, Fair Value, Gross Liability Net Amounts of Assets Presented in the Statements of Financial Position Derivative Asset, Fair Value, Amount Not Offset Against Collateral Statement of Cash Flows [Abstract] Operating Activities Net Cash Provided by (Used in) Operating Activities [Abstract] Net income Adjustments to reconcile net income to net cash provided by operating activities: Adjustments to Reconcile Net Income (Loss) to Cash Provided by (Used in) Operating Activities [Abstract] Net amortization of debt securities Accretion (Amortization) of Discounts and Premiums, Investments Net (accretion) amortization of purchase accounting adjustments Accretion (Amortization) of Discounts and Premiums, Business Combinations The sum of the periodic adjustments of the differences between business combination asset and liability fair values and carrying values that are charged against earnings. As a noncash item, this element is an adjustment to net income when calculating cash provided by or used in operations using the indirect method. Amortization of debt modification costs Amortization of Debt Issuance Costs Origination of loans held for sale Payments for Origination and Purchases of Loans Held-for-sale Proceeds from loans held for sale Proceeds from Sale of Mortgage Loans Held-for-sale Gain on sale of loans (Gain) loss on sale of debt securities Gain (Loss) on Sale of Investments Bank-owned life insurance income, net Life Insurance, Corporate or Bank Owned, Change in Value Stock-based compensation, net of tax benefits Share-based Compensation Depreciation and amortization of premises and equipment Depreciation, Nonproduction Gain on sale and write-downs of other real estate owned, net Gains (Losses) on Sales of Other Real Estate Amortization of core deposit intangibles Amortization of investments in variable interest entities Variable Interest Entities Investment Amortization Amount of amortization expense of investment in variable interest entities. Net increase in accrued interest receivable Increase (Decrease) in Accrued Interest Receivable, Net Net (increase) decrease in other assets Increase (Decrease) in Other Operating Assets Net increase (decrease) in accrued interest payable Increase (Decrease) in Interest Payable, Net Net decrease in other liabilities Increase (Decrease) in Other Operating Liabilities Net cash provided by operating activities Net Cash Provided by (Used in) Operating Activities Investing Activities Net Cash Provided by (Used in) Investing Activities [Abstract] Sales of available-for-sale debt securities Proceeds from Sale of Debt Securities, Available-for-sale Maturities, prepayments and calls of available-for-sale debt securities Proceeds from Maturities, Prepayments and Calls of Debt Securities, Available-for-sale Purchases of available-for-sale debt securities Payments to Acquire Debt Securities, Available-for-sale Maturities, prepayments and calls of held-to-maturity debt securities Proceeds from Maturities, Prepayments and Calls of Held-to-maturity Securities Principal collected on loans Proceeds from Loan and Lease Originations and Principal Collections Loan originations Payments for Loans Originated or Acquired Payments for loans originated or acquired. Net additions to premises and equipment Payments for (Proceeds from) Productive Assets Proceeds from sale of other real estate owned Proceeds from Sale of Wholly Owned Real Estate and Real Estate Acquired in Settlement of Loans Proceeds from redemption of non-marketable equity securities Proceeds from Sale of Federal Home Loan Bank Stock Purchases of non-marketable equity securities Payments to Acquire Federal Home Loan Bank Stock Investments in variable interest entities Payments to Acquire Other Investments Net cash received from acquisitions Payments to Acquire Businesses, Net of Cash Acquired Net cash provided by (used in) investing activities Net Cash Provided by (Used in) Investing Activities Financing Activities Net Cash Provided by (Used in) Financing Activities [Abstract] Net increase in deposits Increase (Decrease) in Deposits Net increase in securities sold under agreements to repurchase Proceeds from (Payments for) in Securities Sold under Agreements to Repurchase Net decrease in short-term Federal Home Loan Bank advances Proceeds from (Repayments of) Short-term Debt, Maturing in Three Months or Less Repayments of long-term Federal Home Loan Bank advances Payments of FHLBank Borrowings, Financing Activities Net increase (decrease) in other borrowed funds Proceeds from (Repayments of) Other Debt Cash dividends paid Payments of Ordinary Dividends, Common Stock Tax withholding payments for stock-based compensation Payments Related to Tax Withholding for Share-based Compensation Net cash (used in) provided by financing activities Net Cash Provided by (Used in) Financing Activities Net (decrease) increase in cash, cash equivalents and restricted cash Cash and Cash Equivalents, Period Increase (Decrease) Cash, cash equivalents and restricted cash at beginning of period Cash and Cash Equivalents, at Carrying Value Cash, cash equivalents and restricted cash at end of period Supplemental Disclosure of Cash Flow Information Supplemental Cash Flow Information [Abstract] Cash paid during the period for interest Interest Paid, Including Capitalized Interest, Operating and Investing Activities Supplemental Disclosure of Non-Cash Investing and Financing Activities Other Noncash Investing and Financing Items [Abstract] Transfer of loans to other real estate owned Real Estate Owned, Transfer to Real Estate Owned Right-of-use assets obtained in exchange for operating lease liabilities Right-of-Use Asset Obtained in Exchange for Operating Lease Liability Dividends declared but not paid Dividends Declared But Not Paid During the Period Dividends Declared But Not Paid During the Period Fair value of common stock shares issued Stock Issued Cash consideration for outstanding shares Cash Consideration for Outstanding Shares Cash Consideration for Outstanding Shares Effective settlement of a pre-existing relationship Business Combination, Effective Settlement of a Pre-Existing Relationship Effective Settlement of a Pre-Existing Relationship on a business combination. Fair Value of Assets Acquired Noncash or Part Noncash Acquisition, Value of Assets Acquired Liabilities Assumed Noncash or Part Noncash Acquisition, Value of Liabilities Assumed Investments in Qualified Affordable Housing Projects Investments in Affordable Housing Projects [Abstract] Amortization expense Amortization Method Qualified Affordable Housing Project Investments, Amortization Tax credits and other tax benefits recognized Affordable Housing Tax Credits and Other Tax Benefits, Amount Leases [Abstract] Finance Lease, Operating cash flows Finance Lease, Interest Payment on Liability Finance Lease, Financing cash flows Finance Lease, Principal Payments Operating Lease, Operating cash flows Operating Lease, Payments Fair Value of Assets and Liabilities Fair Value Disclosures [Text Block] Allowance for Loan and Lease Losses and Loans Receivable Financing Receivable, Allowance for Credit Loss, Additional Information [Abstract] Individually evaluated for impairment Financing Receivable, Individually Evaluated for Impairment Collectively evaluated for impairment Financing Receivable, Collectively Evaluated for Impairment Total loans receivable Individually evaluated for impairment Financing Receivable, Allowance for Credit Losses, Individually Evaluated for Impairment Collectively evaluated for impairment Financing Receivable, Allowance for Credit Losses, Collectively Evaluated for Impairment Total allowance for loan and lease losses Schedule of Marketable Securities [Table] Schedule of Marketable Securities [Table] Schedule of Marketable Securities [Table] U.S. government and federal agency US Government Agencies Debt Securities [Member] U.S. government sponsored enterprises US Government-sponsored Enterprises Debt Securities [Member] State and local governments US States and Political Subdivisions Debt Securities [Member] Corporate bonds Corporate Bond Securities [Member] Residential mortgage-backed securities Residential Mortgage Backed Securities [Member] Commercial mortgage-backed securities Commercial Mortgage Backed Securities [Member] Investment Securities Schedule of Marketable Securities [Line Items] [Line Items] for Schedule of Marketable Securities [Table] [Table] Available-for-sale Available-for-sale Securities, Continuous Unrealized Loss Position [Abstract] Available-for-sale, Fair Value Debt Securities, Available-for-sale, Unrealized Loss Position [Abstract] Less than 12 Months Available-for-sale Securities, Continuous Unrealized Loss Position, Less than Twelve Months, Fair Value 12 Months or More Available-for-sale Securities, Continuous Unrealized Loss Position, Twelve Months or Longer, Fair Value Total Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value Available-for-sale, Unrealized Loss Debt Securities, Available-for-sale, Unrealized Loss Position, Accumulated Loss [Abstract] Less than 12 Months Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss 12 Months or More Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss Total Available-for-sale Securities, Continuous Unrealized Loss Position, Accumulated Loss Held-to-maturity Debt Securities, Held-to-maturity, Continuous Unrealized Loss Position [Abstract] Held-to-maturity, Fair Value Debt Securities, Held-to-maturity, Continuous Unrealized Loss Position, Fair Value [Abstract] Less than 12 Months Debt Securities, Held-to-maturity, Continuous Unrealized Loss Position, Less than 12 Months, Fair Value 12 Months or More Debt Securities, Held-to-maturity, Continuous Unrealized Loss Position, 12 Months or Longer, Fair Value Total Debt Securities, Held-to-maturity, Unrealized Loss Position, Fair Value Held-to-maturity, Unrealized Loss Debt Securities, Held-to-maturity, Unrealized Loss Position, Accumulated Loss [Abstract] Less than 12 Months Debt Securities, Held-to-maturity, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss 12 Months or More Debt Securities, Held-to-maturity, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss Total Debt Securities, Held-to-maturity, Unrealized Loss Position, Accumulated Loss Summary of loans receivable Schedule of Accounts, Notes, Loans and Financing Receivable [Table Text Block] Summary of the activity in the ALLL Allowance for Credit Losses on Financing Receivables [Table Text Block] Summary of ALLL and loans receivable Summary of Recorded Investment in Loans and ALLL on Portfolio Class Basis [Table Text Block] Summary of recorded investment in loans and ALLL on a portfolio class basis. Loan portfolio aging analysis Past Due Financing Receivables [Table Text Block] Summary of impaired loans Impaired Financing Receivables [Table Text Block] Summary of TDRs Troubled Debt Restructurings on Financing Receivables [Table Text Block] Goodwill Roll Forward Goodwill [Roll Forward] Net carrying value at beginning of period Acquisitions Goodwill, Acquired During Period Net carrying value at end of period Other Expenses Other Operating Income and Expense [Text Block] Lease Summary Lessee Lease Description [Table Text Block] Disclosure of information about lessee's leases. Maturities of Lease Liabilities Lessee Lease Liability Maturity [Table Text Block] Tabular disclosure of undiscounted cash flows of lessee's operating and finance lease liabilities. Includes, but is not limited to, reconciliation of undiscounted cash flows to operating and finance lease liabilities recognized in statement of financial position. Components of Lease Expense Lease, Cost [Table Text Block] Supplemental Cash Flow Information Lessee Lease Cash Flow [Table Text Block] Lessee Lease Cash Flow [Table Text Block] Mortgage-backed securities Collateralized Mortgage Backed Securities [Member] Available-for-Sale Available-for-sale Securities, Debt Maturities [Abstract] Available-for-Sale, Amortized Cost Debt Securities, Available-for-sale, Maturity, Amortized Cost, Rolling Maturity [Abstract] Due within one year Debt Securities, Available-for-sale, Maturity, Allocated and Single Maturity Date, Rolling within One Year, Amortized Cost Due after one year through five years Debt Securities, Available-for-sale, Maturity, Allocated and Single Maturity Date, Rolling after One Through Five Years, Amortized Cost Due after five years through ten years Debt Securities, Available-for-sale, Maturity, Allocated and Single Maturity Date, Rolling after Five Through Ten Years, Amortized Cost Due after ten years Debt Securities, Available-for-sale, Maturity, Allocated and Single Maturity Date, Rolling after 10 Years, Amortized Cost Total before mortgage-backed securities Debt Securities, Available-for-sale, Maturity, Allocated and Single Maturity Date, Amortized Cost Mortgage-backed securities Debt Securities, Available-for-sale, Maturity, without Single Maturity Date, Amortized Cost Total Debt Securities, Available-for-sale, Amortized Cost Available-for-Sale, Fair Value Debt Securities, Available-for-sale, Maturity, Fair Value, Rolling Maturity [Abstract] Due within one year Debt Securities, Available-for-sale, Maturity, Allocated and Single Maturity Date, Rolling within One Year, Fair Value Due after one year through five years Debt Securities, Available-for-sale, Maturity, Allocated and Single Maturity Date, Rolling after One Through Five Years, Fair Value Due after five years through ten years Debt Securities, Available-for-sale, Maturity, Allocated and Single Maturity Date, Rolling after Five Through Ten Years, Fair Value Due after ten years Debt Securities, Available-for-sale, Maturity, Allocated and Single Maturity Date, Rolling after 10 Years, Fair Value Total before mortgage-backed securities Debt Securities, Available-for-sale, Maturity, Allocated and Single Maturity Date, Fair Value Mortgage-backed securities Debt Securities, Available-for-sale, Maturity, without Single Maturity Date, Fair Value Held-to-Maturity Debt Securities, Held-to-maturity, Maturity [Abstract] Held-to-Maturity, Amortized Cost Debt Securities, Held-to-maturity, Maturity, Amortized Cost, Rolling Maturity [Abstract] Due within one year Debt Securities, Held-to-maturity, Maturity, Allocated and Single Maturity Date, Rolling within One Year, Amortized Cost Due after one year through five years Debt Securities, Held-to-maturity, Maturity, Allocated and Single Maturity Date, Rolling after One Through Five Years, Amortized Cost Due after five years through ten years Debt Securities, Held-to-maturity, Maturity, Allocated and Single Maturity Date, Rolling after Five Through Ten Years, Amortized Cost Due after ten years Debt Securities, Held-to-maturity, Maturity, Allocated and Single Maturity Date, Rolling after 10 Years, Amortized Cost Total before mortgage-backed securities Debt Securities, Held-to-maturity, Maturity, Allocated and Single Maturity Date, Amortized Cost Mortgage-backed securities Debt Securities, Held-to-maturity, Maturity, without Single Maturity Date, Amortized Cost Amortized Cost Held-to-Maturity, Fair Value Debt Securities, Held-to-maturity, Maturity, Fair Value, Rolling Maturity [Abstract] Due within one year Debt Securities, Held-to-maturity, Maturity, Allocated and Single Maturity Date, Rolling within One Year, Fair Value Due after one year through five years Debt Securities, Held-to-maturity, Maturity, Allocated and Single Maturity Date, Rolling after One Through Five Years, Fair Value Due after five years through ten years Debt Securities, Held-to-maturity, Maturity, Allocated and Single Maturity Date, Rolling after Five Through Ten Years, Fair Value Due after ten years Debt Securities, Held-to-maturity, Maturity, Allocated and Single Maturity Date, Rolling after 10 Years, Fair Value Total before mortgage-backed securities Debt Securities, Held-to-maturity, Maturity, Allocated and Single Maturity Date, Fair Value Mortgage-backed securities Debt Securities, Held-to-maturity, Maturity, without Single Maturity Date, Fair Value Total Debt Securities, Held-to-maturity, Fair Value Offsetting Liabilities [Table] Offsetting Liabilities [Table] Offsetting Liabilities [Line Items] Offsetting Liabilities [Line Items] Offsetting Derivative Liabilities Offsetting Derivative Liabilities [Abstract] Gross Amounts of Recognized Liabilities Derivative Liability, Fair Value, Gross Liability Gross Amounts Offset in the Statements of Financial Position Derivative Liability, Fair Value, Gross Asset Net Amounts of Liabilities Presented in the Statements of Financial Position Derivative Liability, Fair Value, Amount Not Offset Against Collateral Derivative [Table] Derivative [Table] Interest Rate Swap One Interest Rate Swap One [Member] Interest rate swap. Interest Rate Swap Two Interest Rate Swap Two [Member] Interest rate swap. Forward commitments to sell TBA securities Forward Contracts [Member] Interest Rate Lock Commitments Interest Rate Lock Commitments [Member] Derivative financial instruments Derivative [Line Items] Forecasted Notional Amount Derivative Liability, Notional Amount Interest expense recorded on interest rate swap Derivative, Cost of Hedge Unrealized loss to be reclassified within twelve months Cash Flow Hedge Gain (Loss) to be Reclassified within Twelve Months Investment securities pledged as collateral Security Owned and Pledged as Collateral, Fair Value Collateral pledged from the counterparties to the Company Securities Received as Collateral Off-balance Sheet Commitments Fair Value Disclosure, Off-balance Sheet Risks, Face Amount, Liability Statement of Stockholders' Equity [Abstract] Statement [Table] Statement [Table] Common Stock Common Stock [Member] Paid-in Capital Additional Paid-in Capital [Member] Retained Earnings Substantially Restricted Retained Earnings [Member] Accumulated Other Comprehensive (Loss) Income AOCI Attributable to Parent [Member] Statement [Line Items] Statement [Line Items] Balance, beginning, shares Balance, beginning Other comprehensive income (loss) Cash dividends declared Dividends, Common Stock, Cash Stock issued in connection with acquisitions, shares Stock Issued During Period, Shares, Acquisitions Stock issued in connection with acquisitions, value Stock Issued During Period, Value, Acquisitions Stock issuances under stock incentive plans, shares Stock Issued During Period, Shares, Restricted Stock Award, Net of Forfeitures Stock issuances under stock incentive plans, value Stock Issued During Period, Value, Restricted Stock Award, Net of Forfeitures Stock-based compensation and related taxes Adjustments to Additional Paid in Capital, Share-based Compensation, Restricted Stock Unit or Restricted Stock Award, Requisite Service Period Recognition Cumulative-effect of accounting changes Cumulative Effect of New Accounting Principle in Period of Adoption Balance, ending, shares Balance, ending Subsequent Events Subsequent Events [Text Block] Cash dividends declared per share Summary of interest rate swap derivative financial instruments Schedule of Derivative Instruments [Table Text Block] Summary of Pre-Tax Gains or Losses Derivative Instruments, Gain (Loss) [Table Text Block] Offsetting assets Offsetting Assets [Table Text Block] Offsetting liabilities Offsetting Liabilities [Table Text Block] Adjustments Due to New Accounting Pronouncements [Axis] Adjustments Due to New Accounting Pronouncements [Axis] Adjustments Due to New Accounting Pronouncements [Axis] Adjustments Due to New Accounting Pronouncements [Domain] Adjustments Due to New Accounting Pronouncements [Domain] Adjustments Due to New Accounting Pronouncements [Domain] Accounting Standards Update 2017-08 Accounting Standards Update 2017-08 [Member] Accounting Standards Update 2016-02 Accounting Standards Update 2016-02 [Member] Business Acquisition [Axis] Business Acquisition [Axis] Business Acquisition, Acquiree [Domain] Business Acquisition, Acquiree [Domain] First Community Bank Utah First Community Bank Utah [Member] First Community Bank Utah [Member] Nature of Operations and Summary of Significant Accounting Policies Number of Bank Divisions Number of Bank Divisions Number of Bank Divisions Number of Operating Segments Number of Operating Segments Minimum Period Past Due to Consider Loan as Delinquent Minimum Period Past Due to Consider Loans as Delinquent Minimum Period Past Due to Consider Loans as Delinquent Minimum Period Past Due to Consider Loan as Non Accrual Minimum Period Past Due to Consider Loans as Non Accrual Minimum Period Past Due to Consider Loans as Non Accrual Number of years for home equity loan origination term Number of years for home equity loans origination term Number of years for home equity loans origination term Number of Quarters Used to Evaluate Historical Loss Experience Financing Receivable, Allowance for Credit Losses, Number of Quarters Used to Evaluate Historical Loss Experience The number of quarters used to evaluate the historical loss experience when determining the general valuation allowance component of the allowance for credit losses. Minimum Number of Days Delinquent to Charge off Loans Financing Receivable, Threshold Period Past Due, Writeoff1 Threshold period for when financing receivable is considered past due to write off as uncollectible, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. Maximum Term Leases Will Be Considered Short-term Maximum Term Leases Will Be Considered Short-term Maximum Term Leases Will Be Considered Short-term Revenue from Contracts with Customers Revenue from Contract with Customer, Including Assessed Tax Impairment losses on receivables related to contracts with customers Capitalized Contract Cost, Accumulated Impairment Effect of cumulative change on retained earnings from applying new accounting pronouncement New Accounting Pronouncement or Change in Accounting Principle, Cumulative Effect of Change on Equity or Net Assets New Accounting Pronouncement or Change in Accounting Principle, Cumulative Effect of Change on Assets New Accounting Pronouncement or Change in Accounting Principle, Cumulative Effect of Change on Assets New Accounting Pronouncement or Change in Accounting Principle, Cumulative Effect of Change on Assets New Accounting Pronouncement or Change in Accounting Principle, Cumulative Effect of Change on Liabilities New Accounting Pronouncement or Change in Accounting Principle, Cumulative Effect of Change on Liabilities New Accounting Pronouncement or Change in Accounting Principle, Cumulative Effect of Change on Liabilities Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Table] Fair Value Measurements, Recurring and Nonrecurring [Table] Level 1 Fair Value, Inputs, Level 1 [Member] Level 2 Fair Value, Inputs, Level 2 [Member] Level 3 Non-Recurring Measurements 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] Assets with a recorded change resulting from re-measuring at fair value on a non-recurring basis Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Abstract] Total assets measured at fair value on a non-recurring basis Assets, Fair Value Disclosure Assets and Liabilities Assets and Liabilities, Lessee [Abstract] Finance Lease, ROU assets Finance Lease Right Of Use Asset, Gross Amount before accumulated amortization. Finance Lease, Accumulated depreciation Finance Lease Right of Use Asset, Accumulated Amortization Accumulated amortization of finance lease right-of-use asset. Finance Lease, Net ROU assets Finance Lease, Right-of-Use Asset Operating Lease, Net right-of-use assets Operating Lease, Right-of-Use Asset Finance Lease, Lease liabilities Finance Lease, Liability Operating Lease, Lease liabilities Operating Lease, Liability Finance Lease, Weighted Average Remaining Lease Term Finance Lease, Weighted Average Remaining Lease Term Operating Lease, Weighted Average Remaining Lease Term Operating Lease, Weighted Average Remaining Lease Term Finance Lease, Weighted Average Discount Rate Finance Lease, Weighted Average Discount Rate, Percent Operating Lease, Weighted Average Discount Rate Operating Lease, Weighted Average Discount Rate, Percent Fair Value by Asset Class [Axis] Asset Class [Axis] Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, by Asset Class [Domain] Asset Class [Domain] Recurring Measurements Fair Value, Measurements, Recurring [Member] Financial Assets Assets, Fair Value Disclosure [Abstract] Loans held for sale, at fair value Loans Held-for-sale, Fair Value Disclosure Total assets measured at fair value on a recurring basis Financial Liabilities Financial Liabilities Fair Value Disclosure [Abstract] Derivatives Derivative Liability Total liabilities measured at fair value on a recurring basis Financial Liabilities Fair Value Disclosure Loans and Leases Receivable Disclosure Loans and Leases Receivable Disclosure [Abstract] Number of segments in the Company's loan portfolio Financing Receivable, Number of Portfolio Segments Number of portfolio segments in the company's total financing receivables. TDR With Pre Modification Loan Balance for Which Oreo Was Received TDR With Pre Modification Loan Balance for Which Oreo Was Received TDR with pre modification loan balance, for which OREO was received. Consumer mortgage loans secured by residential real estate properties for which formal foreclosure proceedings are in process Mortgage Loans in Process of Foreclosure, Amount OREO Secured by Residential Real Estate Real Estate Acquired Through Foreclosure, Secured by Residential Real Estate Real Estate Acquired Through Foreclosure, Secured by Residential Real Estate Statement of Comprehensive Income [Abstract] Other Comprehensive Income (Loss), Net of Tax Comprehensive Income (Loss), Net of Tax, Attributable to Parent [Abstract] Unrealized gains (losses) on available-for-sale securities Other Comprehensive Income (Loss), Securities, Available-for-Sale, Unrealized Holding Gain (Loss) Arising During Period, before Tax Reclassification adjustment for (gains) losses included in net income Other Comprehensive Income (Loss), Reclassification Adjustment from AOCI for Sale of Securities, before Tax Net unrealized gains (losses) on available-for-sale securities Other Comprehensive Income (Loss), Securities, Available-for-sale, Adjustment, before Tax Tax effect Other Comprehensive Income (Loss), Securities, Available-for-Sale, Unrealized Holding Gain (Loss) Arising During Period, Tax Net of tax amount Other Comprehensive Income (Loss), Securities, Available-for-Sale, Unrealized Holding Gain (Loss) Arising During Period, after Tax Unrealized (losses) gains on derivatives used for cash flow hedges Reclassification adjustment for losses included in net income Other Comprehensive Income (Loss), Reclassification Adjustment from AOCI on Derivatives, before Tax Net unrealized (losses) gains on derivatives used for cash flow hedges Other Comprehensive Income (Loss), Derivatives Qualifying as Hedges, before Tax Tax effect Other Comprehensive Income (Loss), Unrealized Gain (Loss) on Derivatives Arising During Period, Tax Net of tax amount Other Comprehensive Income (Loss), Unrealized Gain (Loss) on Derivatives Arising During Period, Net of Tax Total Comprehensive Income Comprehensive Income (Loss), Net of Tax, Attributable to Parent Debt Securities Investments in Debt and Marketable Equity Securities (and Certain Trading Assets) Disclosure [Text Block] Leases Leases Disclosure [Text Block] The entire disclosure for lessee and lessor leases. Nature of Operations and Summary of Significant Accounting Policies Organization, Consolidation and Presentation of Financial Statements Disclosure and Significant Accounting Policies [Text Block] Changes in the carrying value of goodwill Goodwill Rollforward [Text Block] Tabular disclosure of goodwill rollforward schedule. Schedule of Accounts, Notes, Loans and Financing Receivable [Table] Schedule of Accounts, Notes, Loans and Financing Receivable [Table] Accounts, Notes, Loans and Financing Receivable [Line Items] Accounts, Notes, Loans and Financing Receivable [Line Items] Summary of Loans Receivable Financing Receivable, Net [Abstract] Loans receivable, net Net deferred origination (fees) costs included in loans receivable Unamortized Loan Origination Fees and Costs Amount of deferred fees paid by borrowers and unamortized costs incurred to originate loans and leases. Net purchase accounting (discounts) premiums included in loans receivable Unamortized Discounts and Premiums on Loans Amount of premiums over or discounts from face amounts of loans that are being amortized into income as an adjustment to yield. Weighted-average interest rate on loans (tax-equivalent) Weighted Average Interest Rate on Loans Weighted average interest rate on loans. Transfer of Certain Financial Assets Accounted for as Secured Borrowings [Table] Transfer of Certain Financial Assets Accounted for as Secured Borrowings [Table] Repurchase Agreements and Similar Transactions, Maturity Periods [Axis] Repurchase Agreements and Similar Transactions, Maturity Periods [Axis] Repurchase Agreements and Similar Transactions, Maturity Periods [Domain] Repurchase Agreements and Similar Transactions, Maturity Periods [Domain] Overnight and Continuous Maturity Overnight [Member] Up to 30 Days Maturity Less than 30 Days [Member] Securities Sold Under Agreements to Repurchase Transfer of Certain Financial Assets Accounted for as Secured Borrowings [Line Items] Fair Value, by Balance Sheet Grouping [Table] Fair Value, by Balance Sheet Grouping [Table] Measurement Basis [Axis] Measurement Basis [Axis] Fair Value Measurement [Domain] Fair Value Measurement [Domain] Portion at Fair Value Measurement [Member] Portion at Fair Value Measurement [Member] Carrying Amount Reported Value Measurement [Member] Estimated Fair Value Estimate of Fair Value Measurement [Member] Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] Financial assets Financial Instruments, Financial Assets, Balance Sheet Groupings [Abstract] Cash and cash equivalents Cash and Cash Equivalents, Fair Value Disclosure Debt securities, held-to-maturity Held-to-Maturity Investments, Fair Value Disclosure Fair value portion of held-to-maturity investment securities. Loans receivable, net of ALLL Loans Receivable, Fair Value Disclosure Total financial assets Financial Assets Fair Value Disclosure Financial assets fair value disclosure. Financial liabilities Financial Instruments, Financial Liabilities, Balance Sheet Groupings [Abstract] Term deposits Deposits, Fair Value Disclosure FHLB advances Federal Home Loan Bank Borrowings, Fair Value Disclosure Repurchase agreements and other borrowed funds Federal Funds Purchased and Securities Loaned or Sold under Agreements to Repurchase, Fair Value Disclosure Subordinated debentures Subordinated Debt Obligations, Fair Value Disclosure Total financial liabilities Basic and diluted earnings per share Schedule of Earnings Per Share, Basic and Diluted [Table Text Block] Finance Lease Liabilities, Rolling Maturity Finance Lease Liabilities, Payments, Rolling Maturity [Abstract] Finance Lease, Maturing within one year Finance Lease, Liability, Payments, Due in Next Rolling Twelve Months Finance Lease, Maturing one year through two years Finance Lease, Liability, Payments, Due in Rolling Year Two Finance Lease, Maturing two years through three years Finance Lease, Liability, Payments, Due in Rolling Year Three Finance Lease, Maturing three years through four years Finance Lease, Liability, Payments, Due in Rolling Year Four Finance Lease, Maturing four years through five years Finance Lease, Liability, Payments, Due in Rolling Year Five Finance Lease, Thereafter Finance Lease, Liability, Payments, Due in Rolling after Year Five Finance Lease, Total Lease Payments Finance Lease, Liability, Payments, Due Finance Lease, Present Value of Lease Payments, Short-term Finance Lease, Liability, Current Finance Lease, Present Value of Lease Payments, Long-term Finance Lease, Liability, Noncurrent Finance Lease, Total present value of lease payments Finance Lease, Difference between lease payments and present value of lease payments Finance Lease, Liability, Undiscounted Excess Amount Operating Lease Liabilities, Rolling Maturity Operating Lease Liabilities, Payments, Due, Rolling Maturity [Abstract] Operating Lease, Maturing within one year Lessee, Operating Lease, Liability, Payments, Due Next Rolling Twelve Months Operating Lease, Maturing one year through two years Lessee, Operating Lease, Liability, Payments, Due in Rolling Year Two Operating Lease, Maturing two years through three years Lessee, Operating Lease, Liability, Payments, Due in Rolling Year Three Operating Lease, Maturing three years through four years Lessee, Operating Lease, Liability, Payments, Due in Rolling Year Four Operating Lease, Maturing four years through five years Lessee, Operating Lease, Liability, Payments, Due in Rolling Year Five Operating Lease, Thereafter Lessee, Operating Lease, Liability, Payments, Due after Rolling Year Five Operating Lease, Total Lease Payments Lessee, Operating Lease, Liability, Payments, Due Operating Lease, Present Value of Lease Payments, Short-term Operating Lease, Liability, Current Operating Lease, Present Value of Lease Payments, Long-term Operating Lease, Liability, Noncurrent Operating Lease, Total present value of lease payments Operating Lease, Difference between lease payments and present value of lease payments Lessee, Operating Lease, Liability, Undiscounted Excess Amount Fixed Interest Rate Derivative, Fixed Interest Rate Schedule of Gain (Loss) on Securities [Table] Schedule of Gain (Loss) on Securities [Table] Summary of debt securities Gain (Loss) on Securities [Line Items] Available-for-sale Debt Securities, Available-for-sale [Abstract] Amortized Cost Gross Unrealized Gains Available-for-sale Securities, Accumulated Gross Unrealized Gain, before Tax Gross Unrealized Losses Available-for-sale Securities, Accumulated Gross Unrealized Loss, before Tax Fair Value Held-to-maturity Debt Securities, Held-to-maturity, Fair Value to Amortized Cost [Abstract] Amortized Cost Gross Unrealized Gains Debt Securities, Held-to-maturity, Accumulated Unrecognized Gain Gross Unrealized Losses Debt Securities, Held-to-maturity, Accumulated Unrecognized Loss Fair Value Total Debt Securities, Available-for-sale and Held-to-maturity [Abstract] Amortized Cost Debt Securities, Amortized Cost Basis This item represents the cost of available-for-sale and held-to-maturity debt securities, net of adjustments including accretion, amortization, collection of cash, previous other-than-temporary impairments recognized in earnings (less any cumulative-effect adjustments recognized, as defined), and fair value hedge accounting adjustments, if any. Gross Unrealized Gains Securities, Gross Unrealized Gain Accumulated in Investments Amount of accumulated unrealized gain before deducting unrealized loss on investments in available-for-sale and held-to-maturity securities impacting investments. Gross Unrealized Losses Securities, Gross Unrealized Loss Accumulated in Investments 1 Amount of accumulated unrealized loss before deducting unrealized gain on investments in available-for-sale and held-to-maturity securities impacting investments. Fair Value Debt Securities, Fair Value Fair value of investments in debt securities classified as available-for sale and held-to-maturity. Amortized cost, gross unrealized gains and losses and fair value of debt securities Marketable Securities [Table Text Block] Amortized cost and fair value of securities by contractual maturity Investments Classified by Contractual Maturity Date [Table Text Block] Proceeds from sales and calls of debt securities and the associated gains and losses Gain (Loss) on Securities [Table Text Block] Summary of debt securities with an unrealized loss position Schedule of Unrealized Loss on Investments [Table Text Block] Fair value measurement of assets and liabilities measured at fair value on a recurring basis Schedule of Fair Value, Assets and Liabilities Measured on Recurring Basis [Table Text Block] Fair value measurement of assets measured at fair value on a non-recurring basis Fair Value Measurements, Nonrecurring [Table Text Block] Quantitative information about assets measured at fair value on a non-recurring basis for which Level 3 inputs were used Fair Value Measurement Inputs and Valuation Techniques [Table Text Block] Carrying amounts and estimated fair values of financial instruments not carried at fair value Fair Value, by Balance Sheet Grouping [Table Text Block] Securities Sold Under Agreements to Repurchase Transfers and Servicing of Financial Assets [Text Block] Preferred shares, par value Preferred Stock, Par or Stated Value Per Share Preferred shares, authorized Preferred Stock, Shares Authorized Preferred shares, issued Preferred Stock, Shares Issued Preferred shares, outstanding Preferred Stock, Shares Outstanding Common stock, par value Common Stock, Par or Stated Value Per Share Common stock, shares authorized Common Stock, Shares Authorized Schedule of Financing Receivable, Troubled Debt Restructurings [Table] Schedule of Financing Receivable, Troubled Debt Restructurings [Table] Troubled Debt Restructurings Financing Receivable, Modifications [Line Items] TDRs that Occurred During the Period, Number of Loans Financing Receivable, Modifications, Number of Contracts TDRs that Occurred During the Period, Pre-modification recorded balance Financing Receivable, Modifications, Pre-Modification Recorded Investment TDRs that Occurred During the Period, Post-modification recorded balance Financing Receivable, Modifications, Post-Modification Recorded Investment TDRs that Subsequently Defaulted, Number of Loans Financing Receivable, Modifications, Subsequent Default, Number of Contracts TDRs that Subsequently Defaulted, Recorded Balance Financing Receivable, Modifications, Subsequent Default, Recorded Investment Schedule of Financing Receivables Past Due [Table] Schedule of Financing Receivables Past Due [Table] Financing Receivables, Period Past Due [Axis] Financing Receivables, Period Past Due [Axis] Financing Receivables, Period Past Due [Domain] Financing Receivables, Period Past Due [Domain] Accruing loans 30 to 59 days past due Financing Receivables, 30 to 59 Days Past Due [Member] Accruing loans 60 to 89 days past due Financing Receivables, 60 to 89 Days Past Due [Member] Accruing loans 90 days or more past due Financing Receivables, Equal to Greater than 90 Days Past Due [Member] Financing Receivable, Recorded Investment, Past Due [Line Items] Financing Receivable, Recorded Investment, Past Due [Line Items] Loan portfolio aging analysis Financing Receivable, Recorded Investment, Aging [Abstract] Past due loans Financing Receivable, Recorded Investment, Past Due Non-accrual loans Financing Receivable, Recorded Investment, Nonaccrual Status Total past due and non-accrual loans Financing Receivable Recorded Investment Past Due and Non Accrual Loans Financing receivable recorded investment past due and non accrual loans. Current loans receivable Financing Receivable, Recorded Investment, Current Carrying Value of Repurchase Agreements Transfer of Certain Financial Assets Accounted for as Secured Borrowings [Table Text Block] Lease Expense Lease, Cost [Abstract] Finance lease cost Finance Lease, Cost [Abstract] Amortization of ROU assets Finance Lease, Right-of-Use Asset, Amortization Interest on lease liabilities Finance Lease, Interest Expense Operating lease cost Operating Lease, Cost Short-term lease cost Short-term Lease, Cost Variable lease cost Variable Lease, Cost Sublease income Sublease Income Total lease expense Lease, Cost