Entity Central Index Key Restricted cash and cash equivalents fair value disclosure. Federal home loan bank stock fair value disclosure. Cover [Abstract] Document Type Document Type Amendment Flag Amendment Flag Document Period End Date Document Period End Date Document Fiscal Year Focus Document Fiscal Year Focus Document Fiscal Period Focus Document Fiscal Period Focus Trading Symbol Trading Symbol Entity Registrant Name Entity Registrant Name Entity Central Index Key Current Fiscal Year End Date Current Fiscal Year End Date Entity Filer Category Entity Filer Category Entity Small Business Entity Small Business Entity Emerging Growth Company Entity Emerging Growth Company Entity Common Stock, Shares Outstanding Entity Common Stock Shares Outstanding Entity Current Reporting Status Entity Current Reporting Status Entity Shell Company Entity Shell Company Entity File Number Entity File Number Entity Tax Identification Number Entity Tax Identification Number Entity Address, Address Line One Entity Address Address Line1 Entity Address, City or Town Entity Address City Or Town Entity Address, Country Entity Address Country Entity Address, Postal Zip Code Entity Address Postal Zip Code City Area Code City Area Code Local Phone Number Local Phone Number Document Quarterly Report Document Quarterly Report Document Transition Report Document Transition Report Entity Incorporation, State or Country Code Entity Incorporation State Country Code Entity Interactive Data Current Entity Interactive Data Current Title of 12(g) Security Security12g Title Statement Of Financial Position [Abstract] ASSETS Assets [Abstract] Cash and due from banks Cash And Due From Banks Interest bearing deposits in banks Interest Bearing Deposits In Banks Total cash and cash equivalents Cash And Cash Equivalents At Carrying Value Restricted cash Restricted Cash And Cash Equivalents Investment securities available-for-sale, at fair value Available For Sale Securities Debt Securities Investment securities held-to-maturity, at amortized cost (Fair Value $261,694 at 6/30/2022 and $310,372 at 12/31/2021) Held To Maturity Securities Federal Home Loan Bank stock, at cost Federal Home Loan Bank Stock Loans, net of allowance for loan losses ($35,732 at 6/30/2022 and $34,408 at 12/31/2021) Loans And Leases Receivable Net Reported Amount Accrued interest receivable Interest Receivable Premises and equipment, net Property Plant And Equipment Net Goodwill Goodwill Intangible assets Intangible Assets Net Excluding Goodwill Other assets Other Assets Total assets Assets LIABILITIES AND STOCKHOLDERS’ EQUITY Liabilities And Stockholders Equity [Abstract] Liabilities: Liabilities [Abstract] Deposits: Deposits [Abstract] Non-interest bearing Noninterest Bearing Deposit Liabilities Interest bearing Interest Bearing Deposit Liabilities Total deposits Deposits Accrued interest payable Interest Payable Current And Noncurrent Subordinated debt, net Subordinated Debt Other liabilities Other Liabilities Total liabilities Liabilities Commitments and contingencies (Note 6) Commitments And Contingencies Stockholders’ equity: Stockholders Equity [Abstract] Common stock $0.2083 par value; 48,000 shares authorized; 9,777 and 9,770 shares issued and 9,728 and 9,721 shares outstanding at 6/30/2022 and 12/31/2021, respectively Common Stock Value Preferred stock $100 par value; 300 shares authorized; 9.8 shares issued and outstanding at 6/30/2022 and 12/31/2021, respectively Preferred Stock Value Additional paid-in capital, Common stock Additional Paid In Capital Common Stock Additional paid-in capital, Preferred stock Additional Paid In Capital Preferred Stock Retained earnings Retained Earnings Accumulated Deficit Accumulated other comprehensive (loss) income Accumulated Other Comprehensive Income Loss Net Of Tax Non-controlling interest Minority Interest Common stock in treasury, at cost (32 shares) Treasury Stock Common Value Total stockholders’ equity Stockholders Equity Including Portion Attributable To Noncontrolling Interest Total liabilities and stockholders’ equity Liabilities And Stockholders Equity Investment securities held-to-maturity, Fair Value Held To Maturity Securities Fair Value Loans, net of allowance for loan losses Loans And Leases Receivable Allowance Common stock, par value Common Stock Par Or Stated Value Per Share Common stock, shares authorized Common Stock Shares Authorized Common stock, shares issued Common Stock Shares Issued Common stock, shares outstanding Common Stock Shares Outstanding Preferred stock, par value Preferred Stock Par Or Stated Value Per Share Preferred stock, shares authorized Preferred Stock Shares Authorized Preferred stock, shares issued Preferred Stock Shares Issued Preferred stock, shares outstanding Preferred Stock Shares Outstanding Common stock in treasury, shares Treasury Stock Common Shares Service charges and fees. Income from merchant services, net. Cardholders income, net Noninterest income trustee fees. Technology equipment expense. Other real estate owned expense. Stationery and supplies expense. General, administrative and other expense. Income Statement [Abstract] Interest income: Interest And Dividend Income Operating [Abstract] Loans Interest And Fee Income Loans And Leases Investment securities Interest And Dividend Income Securities Deposits with banks Interest Income Deposits With Financial Institutions Total interest income Interest And Dividend Income Operating Interest expense: Interest Expense [Abstract] Savings deposits Interest Expense Savings Deposits Time deposits Interest Expense Time Deposits Other borrowed funds Interest Expense Other Total interest expense Interest Expense Net interest income Interest Income Expense Net Provision for loan losses Provision For Loan And Lease 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 fees Service Charges And Fees Gain on sale of investment securities Debt And Equity Securities Gain Loss Income from merchant services, net Income From Merchant Services Net Cardholders income, net Cardholders Income Net Trustee fees Noninterest Income Trustee Fees Other income Noninterest Income Other Total non-interest income Noninterest Income Non-interest expense: Noninterest Expense [Abstract] Salaries and employee benefits Labor And Related Expense Occupancy Occupancy Net Technology, equipment and depreciation Technology Equipment Expense Insurance General Insurance Expense Telecommunications Communication FDIC assessment Federal Deposit Insurance Corporation Premium Expense Professional services Professional Fees Contract services Professional And Contract Services Expense Other real estate owned Other Real Estate Owned Expense Stationery and supplies Stationery And Supplies Expense Training and education Other Noninterest Expense General, administrative and other General Administrative And Other Expense Total non-interest expense Noninterest Expense Income before income taxes Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest Income tax expense Income Tax Expense Benefit Net income Profit Loss Net income attributable to noncontrolling interest Net Income Loss Attributable To Noncontrolling Interest Net income available to BankGuam Holding Company Net Income Loss Preferred stock dividend Preferred Stock Dividends Income Statement Impact Net income attributable to common stockholders Net Income Loss Available To Common Stockholders Basic Earnings per common share (EPS): Earnings Per Share Basic [Abstract] Basic EPS Earnings Per Share Basic Earnings per common share (EPS): Earnings Per Share Diluted [Abstract] Diluted EPS Earnings Per Share Diluted Dividends declared per common share Common Stock Dividends Per Share Declared Basic weighted average common shares Weighted Average Number Of Shares Outstanding Basic Diluted weighted average common shares Weighted Average Number Of Diluted Shares Outstanding Amortization of post-transfer unrealized holding loss on held to maturity securities arising during period net of tax. Statement Of Income And Comprehensive Income [Abstract] Net income Other comprehensive income (loss): Other Comprehensive Income Loss Net Of Tax Period Increase Decrease [Abstract] Unrealized holding gain (loss) on available-for-sale securities arising during the period, net of tax Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Net Of Tax Reclassification for (gain) realized on available-for- sale securities Other Comprehensive Income Loss Reclassification Adjustment From A O C I For Sale Of Securities Net Of Tax Amortization of post-transfer unrealized holding loss on held-to-maturity securities during the period, net of tax Amortization Of Post Transfer Unrealized Holding Loss On Held To Maturity Securities Arising During Period Net Of Tax Total other comprehensive income (loss) Other Comprehensive Income Loss Net Of Tax Total comprehensive income (loss) Comprehensive Income Net Of Tax Stock issued during period shares employee stock purchase plan and service award. Stock issued during period value employee stock purchase plan and service award. Return of capital from stocks owned by subsidary. Statement Of Stockholders Equity [Abstract] Statement [Table] Statement [Table] Equity Components Statement Equity Components [Axis] Equity Component Equity Component [Domain] Common Stock [Member] Common Stock [Member] Preferred Stock [Member] Preferred Stock [Member] Additional paid in capital common stock. Additional Paid-in Capital - Common [Member] Additional Paid In Capital Common Stock [Member] Additional paid in capital preferred stock. Additional Paid-in Capital - Preferred [Member] Additional Paid In Capital Preferred Stock [Member] Retained Earnings [Member] Retained Earnings [Member] Accumulated Other Comprehensive Income/(Loss) [Member] Accumulated Other Comprehensive Income [Member] Treasury Stock [Member] Treasury Stock [Member] Noncontrolling Interest [Member] Noncontrolling Interest [Member] Statement [Line Items] Statement [Line Items] Beginning Balances Beginning Balance, Shares Shares Issued Change in accumulated other comprehensive income: Accumulated Other Comprehensive Income Loss Net Of Tax [Abstract] Unrealized gain (loss) on available-for-sale securities, net Common stock issued under Employee Stock Purchase Plan & Service Awards Stock Issued During Period Value Employee Stock Purchase Plan And Service Award Common stock issued under Employee Stock Purchase Plan & Service Awards, Shares Stock Issued During Period Shares Employee Stock Purchase Plan And Service Award Return of capital from stocks owned by subsidiary Return Of Capital From Stocks Owned By Subsidary Cash dividends on common stock Dividends Common Stock Cash Cash dividends on preferred stock Dividends Preferred Stock Cash Ending Balances Ending Balance, Shares Amortization of debt issuance costs net. Non cash lease expense. Increase decrease in lease liability. Income from equity investments in unconsolidated subsidiary. Held to maturity securities change in net unrealized holding gain loss net of tax. Available-for-sale securities change in net unrealized gain (loss), net of tax. Supplemental disclosure of cash flow information. Statement Of Cash Flows [Abstract] Cash flows from operating activities: Net Cash Provided By Used In Operating Activities [Abstract] Adjustments to reconcile net income to net cash (used in) provided by operating activities: Adjustments To Reconcile Net Income Loss To Cash Provided By Used In Operating Activities [Abstract] Depreciation Depreciation Amortization of debt issuance costs Amortization Of Debt Issuance Costs Net Amortization of fees, discounts and premiums Accretion Amortization Of Discounts And Premiums Investments Proceeds from sales of loans held for sale Proceeds From Sale And Collection Of Loans Heldforsale Origination of loans held for sale Payments For Origination And Purchases Of Loans Held For Sale Decrease (increase) in mortgage servicing rights Mortgage Servicing Rights M S R Impairment Recovery Gross realized gains on sale of available-for-sale securities Gain Loss On Sale Of Investments Realized loss on sale of premises and equipment Gain Loss On Sale Of Property Plant Equipment Noncash lease expense Non Cash Lease Expense Increase in deferred tax asset Increase Decrease In Deferred Income Taxes Net change in operating assets and liabilities: Increase Decrease In Operating Capital [Abstract] Accrued interest receivable Increase Decrease In Accrued Interest Receivable Net Other assets Increase Decrease In Other Operating Assets Accrued interest payable Increase Decrease In Interest Payable Net Lease liability Increase Decrease In Lease Liability Other liabilities Increase Decrease In Other Operating Liabilities Net cash (used in) provided by operating activities Net Cash Provided By Used In Operating Activities Cash flows from investing activities: Net Cash Provided By Used In Investing Activities [Abstract] Purchases of available-for-sale securities Payments To Acquire Available For Sale Securities Debt Purchases of held-to-maturity securities Payments To Acquire Held To Maturity Securities Proceeds from sales of available-for-sale securities Proceeds From Sale Of Available For Sale Securities Debt Maturities, prepayments and calls of available-for-sale securities Proceeds From Maturities Prepayments And Calls Of Available For Sale Securities Maturities, prepayments and calls of held-to-maturity securities Proceeds From Maturities Prepayments And Calls Of Held To Maturity Securities Loan originations and principal collections, net Payments For Proceeds From Loans And Leases Income from equity investment in unconsolidated subsidiary Income From Equity Investments In Unconsolidated Subsidiary Dividends received from unconsolidated subsidiary Cash Dividends Paid To Parent Company By Unconsolidated Subsidiaries Purchase of FHLB stock Payments To Acquire Federal Home Loan Bank Stock Proceeds from sales of premises and equipment Proceeds From Sale Of Property Plant And Equipment Purchases of premises and equipment Payments To Acquire Property Plant And Equipment Net cash used in investing activities Net Cash Provided By Used In Investing Activities Cash flows from financing activities: Net Cash Provided By Used In Financing Activities [Abstract] Net (decrease) increase in deposits Increase Decrease In Deposits Proceeds from issuance of subordinated debt, net Proceeds From Issuance Of Subordinated Long Term Debt Proceeds from issuance of common stock Proceeds From Issuance Of Common Stock Dividends paid Payments Of Dividends Common Stock Net cash (used in) provided by financing activities Net Cash Provided By Used In Financing Activities Net change in cash, cash equivalents and restricted cash Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Period Increase Decrease Including Exchange Rate Effect Cash, cash equivalents and restricted cash at beginning of period Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Including Disposal Group And Discontinued Operations Cash, cash equivalents and restricted cash at end of period Supplemental disclosure of cash flow information: Supplemental Disclosure Of Cash Flow Information [Abstract] Cash paid during the period for: Supplemental Cash Flow Elements [Abstract] Interest Interest Paid Net Income taxes Income Taxes Paid Net Supplemental disclosure of noncash investing and financing activities: Cash Flow Noncash Investing And Financing Activities Disclosure [Abstract] Net change in unrealized loss on held-to-maturity securities, net of tax Held To Maturity Securities Change In Net Unrealized Holding Gain Loss Net Of Tax Net change in unrealized gain on available-for-sale securities, net of tax Available For Sale Securities Change In Net Unrealized Gain Loss Net Of Tax Transfer of securities from available-for-sale securities Debt Securities Available For Sale Transfer To Trading Gain Transfer of securities to held-to-maturity securities Debt Securities Held To Maturity Transfer Amount Organization Consolidation And Presentation Of Financial Statements [Abstract] Nature of Business Nature Of Operations Accounting Policies [Abstract] Summary of Significant Accounting Policies and Recent Accounting Pronouncements Significant Accounting Policies [Text Block] Earnings Per Share Pro Forma [Abstract] Earnings Per Common Share Earnings Per Share [Text Block] Investments Debt And Equity Securities [Abstract] Investment Securities Investment [Text Block] Receivables [Abstract] Loans Held for Sale, Loans and Allowance for Loan Losses Financing Receivables [Text Block] Commitments And Contingencies Disclosure [Abstract] Commitments and Contingencies Commitments And Contingencies Disclosure [Text Block] Banking regulation. Banking Regulation [Abstract] Regulatory Capital Requirements Regulatory Capital Requirements Under Banking Regulations [Text Block] Off-balance sheet activities. Fair Value Disclosures [Abstract] Off Balance Sheet Activities Off Balance Sheet Activities [Text Block] Income Tax Disclosure [Abstract] Income Taxes Income Tax Disclosure [Text Block] Fair Value Measurements Fair Value Disclosures [Text Block] Comprehensive Income Net Of Tax [Abstract] Comprehensive Income (Loss) Comprehensive Income Note [Text Block] Leases disclosure. Leases [Abstract] Leases Leases Disclosure [Text Block] Subordinated Borrowings [Abstract] Subordinated Debt Subordinated Borrowings Disclosure [Text Block] Subsequent Events [Abstract] Subsequent Events Subsequent Events [Text Block] Use of Estimates Use Of Estimates Restricted Cash Cash And Cash Equivalents Restricted Cash And Cash Equivalents Policy COVID 19. COVID-19 C O V I D Nineteen Policy [Text Block] Russia/Ukraine conflict. Russia/Ukraine Conflict Russia Ukraine Conflict Policy [Text Block] Recently Adopted Accounting Pronouncements New Accounting Pronouncements Policy Policy [Text Block] Recently Issued but Not Yet Adopted Accounting Pronouncements New Accounting Pronouncements And Changes In Accounting Principles [Text Block] Fair Value Measurement Policy Policy [Text Block] Fair Value Measurement Policy Policy [Text Block] Summary of Earnings Per Common Share Schedule Of Earnings Per Share Basic And Diluted Table [Text Block] Summary of Amortized Cost and Fair Value of Investment Securities, with Gross Unrealized Gains and Losses Debt Securities Available For Sale Table [Text Block] Summary of Proceeds and Gross Realized Gains from Sales of Available-for-sale Investment Securities Schedule Of Realized Gain Loss Table [Text Block] Summary of Amortized Cost and Estimated Fair Value of Investment Securities by Contractual Maturity Investments Classified By Contractual Maturity Date Table [Text Block] Summary of Gross Unrealized Losses and Fair Value of Investments, with Unrealized Losses of Temporarily Impaired Securities Schedule Of Temporary Impairment Losses Investments Table [Text Block] Loan Portfolio Schedule Of Accounts Notes Loans And Financing Receivable [Text Block] Activity of Allowance for Loan Losses Allowance For Credit Losses On Financing Receivables Table [Text Block] Schedule of credit loss related to financing receivables current and noncurrent. Schedule Of Credit Loss Related To Financing Receivables Current And Noncurrent Table [Text Block] Schedule Of Credit Loss Related To Financing Receivables Current And Noncurrent Table [Text Block] Summary of Delinquency Status of Loans Past Due Financing Receivables Table [Text Block] Loans on Non-Accrual Status, by Portfolio Schedule Of Financing Receivables Non Accrual Status Table [Text Block] Summary of Loans by Portfolio Type and Internal Credit Quality Ratings Financing Receivable Credit Quality Indicators Table [Text Block] Schedule of non accrual loans and restructured loans. Schedule Of Non Accrual Loans And Restructured Loans Schedule Of Non Accrual Loans And Restructured Loans Table [Text Block] Information Related to Impaired Loans Impaired Financing Receivables Table [Text Block] Troubled Debt Restructurings Troubled Debt Restructurings On Financing Receivables Table [Text Block] Summary of Actual Capital Amounts and Ratios Schedule Of Compliance With Regulatory Capital Requirements Under Banking Regulations [Text Block] Summary of Financial Instruments with Off-Balance-Sheet Risk Schedule Of Fair Value Off Balance Sheet Risks [Text Block] Fair Value, Assets Measured on Recurring Basis Fair Value Assets Measured On Recurring Basis [Text Block] Assets Measured at Fair Value on Recurring Basis Fair Value Assets Measured On Recurring Basis Unobservable Input Reconciliation [Text Block] Fair value assets measured on recurring basis valuation techniques. Summary of Valuation Techniques and Unobservable Inputs Fair Value Assets Measured On Recurring Basis Valuation Techniques Table [Text Block] Fair Value of Other Financial Instruments Fair Value By Balance Sheet Grouping [Text Block] Components of Accumulated Other Comprehensive Income (Loss) Included in Stockholder's Equity Schedule Of Accumulated Other Comprehensive Income Loss Table [Text Block] Schedule of supplemental balance sheet information related to leases. Summary of Lease Related Assets and Liabilities Recorded in Unaudited Condensed Consolidated Statements of Financial Condition Schedule Of Supplemental Balance Sheet Information Related To Leases Table [Text Block] Schedule of Maturities of Lease Liabilities Under Operating Leases Lessee Operating Lease Liability Maturity Table [Text Block] Summary of weighted-average lease term and discount rate. Summary Of Weighted Average Lease Term And Discount Rate Summary Of Weighted Average Lease Term And Discount Rate Table [Text Block] Schedule Of Segment Reporting Information By Segment [Table] Schedule Of Segment Reporting Information By Segment [Table] Entity By Location Entity By Location [Axis] Location Location [Domain] Bank Branch. Bank Branch [Member] Bank Branch [Member] Business Acquisition Business Acquisition [Axis] Business Acquisition, Acquiree Business Acquisition Acquiree [Domain] ASC trust corporation. ASC Trust Corporation [Member] A S C Trust Corporation [Member] Statistical Measurement Range [Axis] Statistical Measurement Range [Member] Maximum [Member] Maximum [Member] Minimum [Member] Minimum [Member] Geographical Statement Geographical [Axis] Geographical Segment Geographical [Domain] Guam [Member] GUAM CNMI [Member] NORTHERN MARIANA ISLANDS FSM [Member] MICRONESIA, FEDERATED STATES OF RMI [Member] MARSHALL ISLANDS ROP [Member] PALAU San Francisco, California [Member] CALIFORNIA Segment Reporting Information [Line Items] Segment Reporting Information [Line Items] Number of branches Number Of Stores Percentage of shares acquire Business Combination Step Acquisition Equity Interest In Acquiree Percentage Percentage of Voting common stock acquire Business Acquisition Percentage Of Voting Interests Acquired Ownership percentage Equity Method Investment Ownership Percentage Regulatory assets. Regulatory Assets [Abstract] Summary of significant accounting policies. Summary of significant accounting policies. Summary Of Significant Accounting Policies [Table] Summary Of Significant Accounting Policies [Table] Restricted Cash and Cash Equivalents Restricted Cash And Cash Equivalents Cash And Cash Equivalents [Axis] Cash and Cash Equivalents Restricted Cash And Cash Equivalents Cash And Cash Equivalents [Member] Bank of Guam Trust Department Customer [Member] Bank of Guam Trust Department Customer [Member] Bank Of Guam Trust Department Customer [Member] Variable Rate Variable Rate [Axis] Variable Rate Variable Rate [Domain] Base Rate [Member] Base Rate [Member] Unusual or Infrequent Item, or Both Unusual Or Infrequent Item [Axis] Unusual or Infrequent Item, or Both Unusual Or Infrequent Item [Domain] C O V I D 19. COVID 19 [Member] C O V I D Nineteen [Member] Subsequent Event Type Subsequent Event Type [Axis] Subsequent Event Type Subsequent Event Type [Domain] Subsequent Event [Member] Subsequent Event [Member] Loans Insured or Guaranteed by Government Authorities Loans Insured Or Guaranteed By Government Authorities [Axis] Loans Insured or Guaranteed by Government Authorities Loans Insured Or Guaranteed By Government Authorities [Domain] Paycheck Protection Program. Paycheck Protection Program [Member] Paycheck Protection Program [Member] Accounting Standards Update Adjustments For New Accounting Pronouncements [Axis] Accounting Standards Update Type Of Adoption [Member] ASU 2020-04 [Member] Accounting Standards Update202004 [Member] Summary Of Significant Accounting Policies [Line Items] Summary Of Significant Accounting Policies [Line Items] Debt instrument basis spread on variable rate Debt Instrument Basis Spread On Variable Rate1 Debt instrument, face amount Debt Instrument Face Amount Change in accounting principle, accounting standards update, adopted [true false] Change In Accounting Principle Accounting Standards Update Adopted Change in accounting principle, accounting standards update, adoption date Change In Accounting Principle Accounting Standards Update Adoption Date Change in accounting principle, accounting standards update, immaterial effect [true false] Change In Accounting Principle Accounting Standards Update Immaterial Effect Economic forecast period. Economic forecast period Economic Forecast Period Earnings Per Share [Abstract] Shares subscribed and not issued Common Stock Shares Subscribed But Unissued Reverse stock split ratio Stockholders Equity Note Stock Split Conversion Ratio1 Weighted average number of common shares outstanding. Net income available to BankGuam Holding Company Weighted average number of common shares outstanding - used to calculate basic and diluted earnings per common share Weighted Average Number Of Common Shares Outstanding Schedule Of Available For Sale Securities [Table] Schedule Of Available For Sale Securities [Table] Financial Instrument Financial Instrument [Axis] Financial Instruments Transfers And Servicing Of Financial Instruments Types Of Financial Instruments [Domain] US government agency and government sponsored enterprises debt securities. U.S. Government Agency and Government Sponsored Enterprise (GSE) Debt Securities [Member] U S Government Agency And Government Sponsored Enterprise Debt Securities [Member] U.S. Government Agency Pool Securities [Member] U S Government Sponsored Enterprises Debt Securities [Member] U.S. Government Agency or GSE Residential Mortgage-Backed Securities [Member] Mortgage Backed Securities Issued By U S Government Sponsored Enterprises [Member] Schedule Of Available For Sale Securities [Line Items] Schedule Of Available For Sale Securities [Line Items] Securities Available for Sale, Amortized Cost Available For Sale Debt Securities Amortized Cost Basis Securities Available for Sale, Gross Unrealized Gains Available For Sale Debt Securities Accumulated Gross Unrealized Gain Before Tax Securities Available for Sale, Gross Unrealized Losses Available For Sale Debt Securities Accumulated Gross Unrealized Loss Before Tax Securities Available for Sale, Estimated Fair Value Securities Held to Maturity, Amortized Cost Securities Held to Maturity, Gross Unrealized Gains Held To Maturity Securities Accumulated Unrecognized Holding Gain Securities Held to Maturity, Gross Unrealized Losses Held To Maturity Securities Accumulated Unrecognized Holding Loss Securities Held to Maturity, Estimated Fair Value Schedule Of Trading Securities And Other Trading Assets [Table] Schedule Of Trading Securities And Other Trading Assets [Table] Pledged Status Pledged Status [Axis] Pledged Status Pledged Status [Domain] Pledged to secure various government deposits and to meet other public requirements. Pledged to Secure Various Government Deposits and to meet Other Public Requirements [Member] Pledged To Secure Various Government Deposits And To Meet Other Public Requirements [Member] U.S. Government Corporations and Agencies [Member] U S Government Agencies Debt Securities [Member] Small business administration pool securities. Small Business Administration (SBA) Pool Securities [Member] Small Business Administration Pool Securities [Member] Residential Mortgage Backed Securities [Member] Residential Mortgage Backed Securities [Member] Agency Securities Issued by Federal Home Loan Bank (FHLB) [Member] Federal Home Loan Bank Certificates And Obligations F H L B [Member] Mortgage backed securities issued by federal home loan corporation. Mortgage-Backed Securities Issued by Federal Home Loan Corporation (FHLMC) [Member] Mortgage Backed Securities Issued By Federal Home Loan Corporation [Member] Agency Securities Issued by Federal Home Loan Mortgage Corporation (FHLMC) [Member] Federal Home Loan Mortgage Corporation Certificates And Obligations F H L M C [Member] Mortgage backed securities issued by federal national mortgage association (FNMA). Mortgage Backed Securities Issued By Federal National Mortgage Association (FNMA) [Member] Mortgage Backed Securities Issued By Federal National Mortgage Association F N M A [Member] Federal national mortgage association certificate and obligations (FNMA). Agency Security Issued by Federal National Mortgage Association (FNMA) [Member] Federal National Mortgage Association Certificate And Obligations F N M A [Member] Mortgage backed securities issued by government national mortgage association GNMA. Government National Mortgage Association (GNMA) [Member] Mortgage Backed Securities Issued By Government National Mortgage Association G N M A [Member] Federal farm credit banks certificates and obligations FFCB. Agency Security Issued by Federal Farm Credit Banks (FFCB) [Member] Federal Farm Credit Banks Certificates And Obligations F F C B [Member] ASC Trust LLC. ASC Trust LLC [Member] A S C Trust L L C [Member] Title of Individual Title Of Individual [Axis] Title of Individual Title Of Individual With Relationship To Entity [Domain] Director Director [Member] Long-Term Debt, Type Longterm Debt Type [Axis] Long-Term Debt, Type Longterm Debt Type [Domain] Subordinated Notes [Member] Subordinated Debt [Member] Schedule Of Trading Securities And Other Trading Assets [Line Items] Schedule Of Trading Securities And Other Trading Assets [Line Items] Investment securities at carrying value, pledged Debt Securities Gross realized gains from sales Debt Securities Available For Sale Realized Gain Gross realized losses from sales Debt Securities Available For Sale Realized Loss Estimated average remaining life securities. Available for sale debt securities Estimated average remaining life securities Estimated Average Remaining Life Securities Available for sale, Amortized cost, Due within one year Available For Sale Securities Debt Maturities Within One Year Amortized Cost Available for sale, Amortized cost, Due after one but within five years Available For Sale Securities Debt Maturities After One Through Five Years Amortized Cost Available for sale, Amortized cost, Due after five but within ten years Available For Sale Securities Debt Maturities After Five Through Ten Years Amortized Cost Available for sale, Amortized cost, Due after ten years Available For Sale Securities Debt Maturities After Ten Years Amortized Cost Available for sale, Estimated Fair Value, Due within one year Available For Sale Securities Debt Maturities Within One Year Fair Value Available for sale, Estimated Fair Value, Due after one but within five years Available For Sale Securities Debt Maturities After One Through Five Years Fair Value Available for sale, Estimated Fair Value, Due after five but within ten years Available For Sale Securities Debt Maturities After Five Through Ten Years Fair Value Available for sale, Estimated Fair Value, Due after ten years Available For Sale Securities Debt Maturities After Ten Years Fair Value Securities Available for Sale, Estimated Fair Value Held to Maturity, Amortized Cost, Due within one year Held To Maturity Securities Debt Maturities Within One Year Net Carrying Amount Held to Maturity, Amortized Cost, Due after one but within five years Held To Maturity Securities Debt Maturities After One Through Five Years Net Carrying Amount Held to Maturity, Amortized Cost, Due after five but within ten years Held To Maturity Securities Debt Maturities After Five Through Ten Years Net Carrying Amount Held to Maturity, Amortized Cost, Due after ten years Held To Maturity Securities Debt Maturities After Ten Years Net Carrying Amount Held to maturity, Estimated Fair Value, Due within one year Held To Maturity Securities Debt Maturities Within One Year Fair Value Held to maturity, Estimated Fair Value, Due after one but within five years Held To Maturity Securities Debt Maturities After One Through Five Years Fair Value Held to maturity, Estimated Fair Value, Due after five but within ten years Held To Maturity Securities Debt Maturities After Five Through Ten Years Fair Value Held to maturity, Estimated Fair Value, Due after ten years Held To Maturity Securities Debt Maturities After Ten Years Fair Value Securities Held to Maturity, Estimated Fair Value Number of investment securities in unrealized loss position were not other than temporarily impaired. Investment securities in unrealized loss position were not other-than-temporarily impaired Number Of Investment Securities In Unrealized Loss Position Were Not Other Than Temporarily Impaired Stock purchase agreement date. Percentage of non controlling interest. Percentage of non minority voting common stock owned. Notes, aggregate principal amount Stock purchase agreement date Stock Purchase Agreement Date Non-controlling interest Percentage Of Non Controlling Interest Percentage of non minority voting of common stock owned Percentage Of Non Minority Voting Common Stock Owned Loans and allowance for loan losses. Loans And Allowance For Loan Losses [Abstract] Schedule Of Accounts Notes Loans And Financing Receivable [Table] Schedule Of Accounts Notes Loans And Financing Receivable [Table] Commercial mortgage financing receivable. Commercial Mortgage [Member] Commercial Mortgage Financing Receivable [Member] Customer Securities for which Entity has Right to Sell or Repledge Customer Securities For Which Entity Has Right To Sell Or Repledge [Axis] Customer Securities for which Entity has Right to Sell or Repledge, Securities Type Customer Securities For Which Entity Has Right To Sell Or Repledge Securities Type [Domain] Ten Largest Borrowing Relationship. 10 Largest Borrowing Relationship [Member] Ten Largest Borrowing Relationship [Member] Five year paycheck protection program loans. 5-Year Paycheck Protection Program [Member] Five Year Paycheck Protection Program Loans [Member] Class of Financing Receivable Financing Receivable Recorded Investment By Class Of Financing Receivable [Axis] Class of Financing Receivable Financing Receivable Recorded Investment Class Of Financing Receivable [Domain] Financing Receivable Portfolio Segment Financing Receivable Portfolio Segment [Axis] Financing Receivable Portfolio Segment Financing Receivable Portfolio Segment [Domain] Troubled debt restructuring. Troubled Debt Restructuring Troubled Debt Restructuring [Member] Type of Borrower Class Of Financing Receivable Type Of Borrower [Axis] Class of Financing Receivable, Type of Borrower Class Of Financing Receivable Type Of Borrower [Domain] Borrowing Relationship One. Borrowing Relationship One [Member] Borrowing Relationship One [Member] Accounts Notes And Loans Receivable [Line Items] Accounts Notes And Loans Receivable [Line Items] Bank originated of mortgage loans held for sale Payments For Origination Of Mortgage Loans Held For Sale Sale of mortgage loans held for sale Proceeds From Sale Of Mortgage Loans Held For Sale Unpaid principal balance of mortgage loans serviced for others. Percentage of increase decrease in finance receivables. Unpaid principal balances of mortgage loans serviced Unpaid Principal Balances Of Mortgage Loans Serviced For Others Mortgage loan payment of principal Principal Amount Outstanding On Loans Held For Sale Or Securitization Increase (Decrease) percentage of gross loan Percentage Of Increase Decrease In Finance Receivables Mortgage servicing rights at their fair value Servicing Asset At Fair Value Amount Number of borrowing relationships. Percentage of loan aggregate loan portfolio. Deferred fee (income) costs Loans And Leases Receivable Deferred Income Number of borrowing relationships Number Of Borrowing Relationships Gross loans, total amount Loans And Leases Receivable Gross Carrying Amount Gross loans, Total Percent Percentage Of Loan Aggregate Loan Portfolio Percentage of loan on commercial loan portfolio. Percentage of loan on consumer loan portfolio. Commercial and industrial financing receivable. Commercial & Industrial [Member] Commercial And Industrial Financing Receivable [Member] Commercial Construction Loan [Member] Construction Loans [Member] Commercial agriculture portfolio segment. Commercial Agriculture [Member] Commercial Agriculture Portfolio Segment [Member] Commercial [Member] Commercial Portfolio Segment [Member] Consumer other financing receivables. Other Consumer Loans [Member] Consumer Other Financing Receivables [Member] Consumer Loans [Member] Consumer Portfolio Segment [Member] Residential Mortgage Loans [Member] Residential Mortgage [Member] Home Equity [Member] Home Equity [Member] Automobile [Member] Automobile Loan [Member] Deferred loan (fees) costs, net Allowance for loan losses Loans, net Commercial, Percent Percentage Of Loan On Commercial Loan Portfolio Consumer, Percent Percentage Of Loan On Consumer Loan Portfolio Gross loans, Total Percent Debt instrument unearned fees. Debt instrument loan origination fee paid from small business administration in percentage. Debt instrument, term Debt Instrument Term Debt instrument, interest rate Debt Instrument Interest Rate Stated Percentage Proceeds from loans fund Proceeds From Loans Debt instrument, outstanding balance Debt Instrument Carrying Amount Debt instrument unearned fees Debt Instrument Unearned Fees Debt instrument loan origination fee paid from small business administration in percentage Debt Instrument Loan Origination Fee Paid From Small Business Administration In Percentage Allowance for loan and lease loss, recovery of (provision for) bad debts. Provision For Loan And Lease Losses excluding Reserve For Off-Balance Sheet Risk. Balance, beginning of period Charged off loans Allowance For Loan And Lease Losses Write Offs Recoveries on loans previously charged off Allowance For Loan And Lease Loss Recovery Of Provision For Bad Debts Provision for loan losses Provision For Loan And Lease Losses Excluding Reserve For Off Balance Sheet Risk Balance, end of period Recorded investment in loans and leases. Schedule Of Financing Receivable Allowance For Credit Losses [Table] Schedule Of Financing Receivable Allowance For Credit Losses [Table] Residential mortgage and home equity. Residential Mortgage And Home Equity [Member] Residential Mortgage And Home Equity [Member] Consumer portfolio, other than residential mortgages. Consumer [Member] Consumer Portfolio Other Than Residential Mortgages [Member] Financing Receivable Allowance For Credit Losses [Line Items] Financing Receivable Allowance For Credit Losses [Line Items] Allowance for loan losses: Financing Receivable Allowance For Credit Losses Roll Forward Charge-offs Recoveries Provision Allowance balance at end of period related to: Financing Receivable Allowance For Credit Loss Additional Information [Abstract] Loans individually evaluated for impairment Financing Receivable Allowance For Credit Losses Individually Evaluated For Impairment1 Loans collectively evaluated for impairment Financing Receivable Allowance For Credit Losses Collectively Evaluated For Impairment Loan balances at end of period: Recorded Investment In Loans And Leases [Abstract] Loans individually evaluated for impairment Financing Receivable Individually Evaluated For Impairment Loans collectively evaluated for impairment Financing Receivable Collectively Evaluated For Impairment Ending balance Loans held for sale loans and allowance for loan losses. Allowance For Loans And Lease Losses Provision For Loss Net [Abstract] Schedule Of Financing Receivables Past Due [Table] Schedule Of Financing Receivables Past Due [Table] Financial Asset, Aging Financing Receivables Period Past Due [Axis] Financial Asset, Aging Financing Receivables Period Past Due [Domain] 30-59 Days Past Due [Member] Financing Receivables30 To59 Days Past Due [Member] 60-89 Days Past Due [Member] Financing Receivables60 To89 Days Past Due [Member] Financing receivables equal to greater than 90 days past due non-accrual. 90 Days and Greater Non-Accrual [Member] Financing Receivables Equal To Greater Than90 Days Past Due Non Accrual [Member] Financing receivables equal to greater than 90 days past due still accruing. 90 Days and Greater Still Accruing [Member] Financing Receivables Equal To Greater Than90 Days Past Due Still Accruing [Member] Current [Member] Financial Asset Not Past Due [Member] Financing Receivable Recorded Investment Past Due [Line Items] Financing Receivable Recorded Investment Past Due [Line Items] Total Past Due Notes Receivable Gross Total Loans Outstanding Accrual of interest payments on loan. Nonaccrual status charged off on loan. Nonaccrual loans number of consecutive payments required for restoring accrual status. Accrual of interest payments on loan Accrual Of Interest Payments On Loan Nonaccrual status, charged off on loan Nonaccrual Status Charged Off On Loan Nonaccrual loans, number of receipt of consecutive payments required for restoring accrual status Nonaccrual Loans Number Of Consecutive Payments Required For Restoring Accrual Status Non-accrual loans Financing Receivable Recorded Investment Nonaccrual Status Loan collateralized. Percentage of Loan collateralized Loan Collateralized All loans and credit cards delinquent. Real estate loans delinquent. Delinquent real estate loans foreclosure completion period. Period for loans delinquent under formula category. Maximum value of commercial loans considered to include in monthly formula classified loans. All loans and credit cards delinquent All Loans And Credit Cards Delinquent Real estate loans delinquent Real Estate Loans Delinquent Delinquent real estate loans foreclosure completion period Delinquent Real Estate Loans Foreclosure Completion Period Period for loans delinquent under formula category Period For Loans Delinquent Under Formula Category Maximum value of commercial loans considered to include in monthly formula total Maximum Value Of Commercial Loans Considered To Include In Monthly Formula Classified Loans Schedule Of Financing Receivable Recorded Investment Credit Quality Indicator [Table] Schedule Of Financing Receivable Recorded Investment Credit Quality Indicator [Table] Internal Credit Assessment Internal Credit Assessment [Axis] Internal Credit Assessment Internal Credit Assessment [Domain] Pass [Member] Pass [Member] Special Mention [Member] Special Mention [Member] Substandard [Member] Substandard [Member] Formula. Formula Classified [Member] Formula [Member] Doubtful [Member] Doubtful [Member] Financing Receivable Recorded Investment [Line Items] Financing Receivable Recorded Investment [Line Items] Troubled debt restructurings. Financing receivables impaired non-accruing troubled debt restructuring. Financing receivables impaired accruing troubled debt restructuring. Impaired loans less than 90 days delinquent and included in total impaired loans. Restructured loans: Troubled Debt Restructurings [Abstract] Non-accruing restructured loans Financing Receivables Impaired Non Accruing Troubled Debt Restructuring Accruing restructured loans Financing Receivables Impaired Accruing Troubled Debt Restructuring Total restructured loans Financing Receivable Modifications Recorded Investment Other impaired loans Loans And Leases Receivable Impaired Nonperforming Nonaccrual Of Interest Total impaired loans Impaired Financing Receivable Recorded Investment Impaired loans less than 90 days delinquent and included in total impaired loans Impaired Loans Less Than Ninety Days Delinquent And Included In Impaired Loans Impaired financing receivable with no related allowance interest income/expense accrual method. Schedule Of Impaired Financing Receivable [Table] Schedule Of Impaired Financing Receivable [Table] Financing Receivable Impaired [Line Items] Financing Receivable Impaired [Line Items] Total impaired loans with no related allowance, Recorded Investment Impaired Financing Receivable With No Related Allowance Recorded Investment Total impaired loans with no related allowance, Unpaid Principal Balance Impaired Financing Receivable With No Related Allowance Unpaid Principal Balance Total impaired loans with no related allowance, Average Recorded Investment Impaired Financing Receivable With No Related Allowance Average Recorded Investment Total impaired loans with no related allowance, Interest Income Recognized Impaired Financing Receivable With No Related Allowance Interest Income Expense Accrual Method Impaired financing receivable with related allowance interest income expense and unearned discount accrual method. Total impaired loans with a related allowance recorded, Recorded Investment Impaired Financing Receivable With Related Allowance Recorded Investment Total impaired loans with a related allowance recorded, Unpaid Principal Balance Impaired Financing Receivable With Related Allowance Unpaid Principal Balance Total impaired loans with a related allowance recorded, Average Recorded Investment Impaired Financing Receivable With Related Allowance Average Recorded Investment Total impaired loans with a related allowance recorded, Interest Income Recognized Impaired Financing Receivable With Related Allowance Interest Income Expense And Unearned Discount Accrual Method Troubled Debt Restructurings (TDRs) Increase (Decrease) in total gross loans Increase Decrease In Finance Receivables Financing receivable principal modification recorded investment. Schedule Of Financing Receivable Troubled Debt Restructurings [Table] Schedule Of Financing Receivable Troubled Debt Restructurings [Table] Financial Instrument Performance Status Financial Instrument Performance Status [Axis] Financial Instrument Performance Status Financial Instrument Performance Status [Domain] Performing [Member] Performing Financing Receivable [Member] Nonperforming [Member] Nonperforming Financing Receivable [Member] Financing Receivable Modifications [Line Items] Financing Receivable Modifications [Line Items] Number of Loans Financing Receivable Modifications Number Of Contracts2 Pre-Modification Outstanding Recorded Investment Financing Receivable Modifications Pre Modification Recorded Investment2 Principal Modifications Financing Receivable Principal Modification Recorded Investment Post-Modification Outstanding Recorded Investment Financing Receivable Modifications Post Modification Recorded Investment2 Outstanding Balance Number of days deferrals residential mortgage and commercial loans. Number of days deferrals for consumer and auto mobile loans. Number of days troubled debt restructurings loans delinquent. Allowance for loan and lease losses, specific reserve. Number of days deferrals residential mortgage and commercial loans Number Of Days Deferrals Residential Mortgage And Commercial Loans Number of days deferrals for consumer and auto mobile loans Number Of Days Deferrals For Consumer And Auto Mobile Loans Number of days troubled debt restructurings loans delinquent Number Of Days Troubled Debt Restructurings Loans Delinquent Specific reserve Allowance For Loan And Lease Losses Specific Reserve Defaults troubled debt restructuring Troubled Debt Restructuring Debtor Other Number of borrowing relationship in bankruptcy. Loans and leases receivable, amount under bankruptcy. Number of significant borrowing relationship in bankruptcy Number Of Borrowing Relationship In Bankruptcy Loans receivable, amount under bankruptcy Loans And Leases Receivable Amount Under Bankruptcy Total Capital (to Risk Weighted Assets), Actual, Amount Capital Tier 1 Capital (to Risk Weighted Assets), Actual, Amount Tier One Risk Based Capital Tier 1 Capital (to Average Assets), Actual, Amount Tier One Leverage Capital Common Equity Tier 1 Capital (to Risk Weighted Assets), Actual, Amount Common Equity Tier One Capital Total Capital (to Risk Weighted Assets), Actual, Ratio Capital To Risk Weighted Assets Tier 1 Capital (to Risk Weighted Assets), Actual, Ratio Tier One Risk Based Capital To Risk Weighted Assets Tier 1 Capital (to Average Assets), Actual, Ratio Tier One Leverage Capital To Average Assets Common Equity Tier 1 Capital (to Risk Weighted Assets), Actual, Ratio Common Equity Tier One Capital Ratio Total Capital (to Risk Weighted Assets), For Capital Adequacy Purposes, Amount Capital Required For Capital Adequacy Tier 1 Capital (to Risk Weighted Assets), For Capital Adequacy Purposes, Amount Tier One Risk Based Capital Required For Capital Adequacy Tier 1 Capital (to Average Assets), For Capital Adequacy Purposes, Amount Tier One Leverage Capital Required For Capital Adequacy Common Equity Tier 1 Capital (to Risk Weighted Assets), For Capital Adequacy Purposes, Amount Common Equity Tier One Capital Required For Capital Adequacy Tier one common equity required for capital adequacy to risk weighted assets. Total Capital (to Risk Weighted Assets), For Capital Adequacy Purposes, Ratio Capital Required For Capital Adequacy To Risk Weighted Assets Tier 1 Capital (to Risk Weighted Assets), For Capital Adequacy Purposes, Ratio Tier One Risk Based Capital Required For Capital Adequacy To Risk Weighted Assets Tier 1 Capital (to Average Assets), For Capital Adequacy Purposes, Ratio Tier One Leverage Capital Required For Capital Adequacy To Average Assets Common Equity Tier 1 Capital (to Risk Weighted Assets), For Capital Adequacy Purposes, Ratio Tier One Common Equity Required For Capital Adequacy To Risk Weighted Assets Total Capital (to Risk Weighted Assets), To Be Well Capitalized Under Prompt Corrective Action Provisions, Amount Capital Required To Be Well Capitalized Tier 1 Capital (to Risk Weighted Assets), To Be Well Capitalized Under Prompt Corrective Action Provisions, Amount Tier One Risk Based Capital Required To Be Well Capitalized Tier 1 Capital (to Average Assets), To Be Well Capitalized Under Prompt Corrective Action Provisions, Amount Tier One Leverage Capital Required To Be Well Capitalized Common Equity Tier 1 Capital (to Risk Weighted Assets), To Be Well Capitalized Under Prompt Corrective Action Provisions, Amount Common Equity Tier One Capital Required To Be Well Capitalized Tier one common equity capital required to be well capitalized to risk weighted assets. Total Capital (to Risk Weighted Assets), To Be Well Capitalized Under Prompt Corrective Action Provisions, Ratio Capital Required To Be Well Capitalized To Risk Weighted Assets Tier 1 Capital (to Risk Weighted Assets), To Be Well Capitalized Under Prompt Corrective Action Provisions, Ratio Tier One Risk Based Capital Required To Be Well Capitalized To Risk Weighted Assets Tier 1 Capital (to Average Assets), To Be Well Capitalized Under Prompt Corrective Action Provisions, Ratio Tier One Leverage Capital Required To Be Well Capitalized To Average Assets Common Equity Tier 1 Capital (to Risk Weighted Assets), To Be Well Capitalized Under Prompt Corrective Action Provisions, Ratio Tier One Common Equity Capital Required To Be Well Capitalized To Risk Weighted Assets Loss Contingencies [Table] Loss Contingencies [Table] Credit Facility Credit Facility [Axis] Credit Facility Credit Facility [Domain] Letters of Credit [Member] Letter Of Credit [Member] Commitments to Extend Credit [Member] Commitments To Extend Credit [Member] Loss Contingency Nature Loss Contingencies By Nature Of Contingency [Axis] Loss Contingency, Nature Loss Contingency Nature [Domain] Standby Letters of Credit [Member] Standby Letters Of Credit [Member] Commercial letters of credit. Commercial Letters Of Credit [Member] Commercial Letters Of Credit [Member] Loss Contingencies [Line Items] Loss Contingencies [Line Items] Financial Instrument with off-balance-sheet risk Fair Value Disclosure Offbalance Sheet Risks Amount Liability Letters of credit expiration date maximum. Letters of credit expiration date maximum Letters Of Credit Expiration Date Maximum Guarantee maturity maximum. Maximum undiscounted future payments Bank Acceptances Executed Guarantee maturity maximum Guarantee Maturity Maximum Reserve liabilities associated with guarantees Guarantee Obligations Current Carrying Value Valuation allowance Deferred Tax Assets Valuation Allowance Total deferred tax asset, net Deferred Tax Assets Liabilities Net Guam income tax statutory rate Effective Income Tax Rate Reconciliation At Federal Statutory Income Tax Rate Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Table] Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Table] Measurement Frequency Fair Value By Measurement Frequency [Axis] Measurement Frequency Fair Value Measurement Frequency [Domain] Fair Value on Recurring Basis [Member] Fair Value Measurements Recurring [Member] Fair Value Hierarchy and NAV Fair Value By Fair Value Hierarchy Level [Axis] Fair Value Hierarchy and NAV Fair Value Measurements Fair Value Hierarchy [Domain] Quoted Prices in Active Markets for Identical Assets (Level 1) [Member] Fair Value Inputs Level1 [Member] Significant Other Observable Inputs (Level 2) [Member] Fair Value Inputs Level2 [Member] Significant Unobservable Inputs (Level 3) [Member] Fair Value Inputs Level3 [Member] U.S. Treasury Notes and Bonds [Member] U S Treasury Securities [Member] US government agencies and sponsored enterprises debt securities. U.S. Government Agency and Sponsored Enterprise (GSE) Debt Securities [Member] U S Government Agencies And Sponsored Enterprises Debt Securities [Member] Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items] Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items] Total fair value Assets Fair Value Disclosure Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Abstract] Liabilities measured at fair value on a recurring basis Liabilities Fair Value Disclosure Fair value measurement with unobservable inputs reconciliation, recurring basis, asset gain (loss). Beginning balance Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Asset Value Realized and unrealized net losses: Fair Value Measurement With Unobservable Input Reconciliation Recurring Basis Asset Gain Loss [Abstract] Included in net income Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Asset Gain Loss Included In Earnings1 Ending balance Assets Fair Value Disclosure [Abstract] Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis Valuation Techniques [Table] Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis Valuation Techniques [Table] Measurement Input Type Measurement Input Type [Axis] Measurement Input Type Measurement Input Type [Domain] Discount Rate [Member] Measurement Input Discount Rate [Member] Weighted Average Prepayment Rate [Member] Measurement Input Constant Prepayment Rate [Member] Weighted Average [Member] Weighted Average [Member] Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis Valuation Techniques [Line Items] Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis Valuation Techniques [Line Items] Mortgage Servicing Rights, Estimated Fair Value Mortgage Servicing Rights, Valuation Technique [Extensible List] Servicing Asset Valuation Technique Extensible List Mortgage Servicing Rights, Range of Inputs Servicing Asset Measurement Input Transfers in or out of the Bank's Level 3 financial instruments Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Asset Transfers Net Change in fair value non financial assets liabilities. Nonfinancial assets or liabilities for which a nonrecurring change in fair value Change In Fair Value Non Financial Assets Liabilities Number of days to maturity federal funds purchased and FHLB advances to be treated as short term borrowings. Number of days to maturity federal funds purchased and FHLB advances to be treated as short-term borrowings Federal Funds Purchased And F H L B Advances To Be Treated As Short Term Borrowings Maturity Period Short-term borrowings outstanding Short Term Borrowings Fair value of FHLB advances maturing after ninety days. Fair value of FHLB advances maturing after ninety days Fair Value Of F H L B Advances Maturity Period Long-term borrowings outstanding Long Term Debt Fair Value on Nonrecurring Basis [Member] Fair Value Measurements Nonrecurring [Member] Measurement Basis Fair Value By Measurement Basis [Axis] Fair Value Disclosure Item Amounts [Default] Portion At Fair Value Fair Value Disclosure [Member] Fair Value Measurement Fair Value Disclosure Item Amounts [Domain] Carrying Amount [Member] Carrying Reported Amount Fair Value Disclosure [Member] Estimated Fair Value [Member] Estimate Of Fair Value Fair Value Disclosure [Member] Level 1 [Member] Level 2 [Member] Level 3 [Member] Financial assets: Financial Instruments Financial Assets Balance Sheet Groupings [Abstract] Cash and cash equivalents Cash And Cash Equivalents Fair Value Disclosure Restricted cash Restricted Cash And Cash Equivalents Fair Value Disclosure Federal Home Loan Bank stock Federal Home Loan Bank Stock Fair Value Disclosure Investment securities held-to-maturity Loans, net Loans Receivable Fair Value Disclosure Financial liabilities: Financial Instruments Financial Liabilities Balance Sheet Groupings [Abstract] Deposits Deposits Fair Value Disclosure Total Other comprehensive income loss from held to maturity to available for sale securities net of tax. Net unrealized (loss) gain on available-for-sale securities Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Before Tax Amounts reclassified from AOCI for (gain) on sale of investment securities available-for-sale included in net income Tax effect Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Tax Unrealized holding (loss) gain on available-for-sale securities, net of tax Other Comprehensive Income Loss Available For Sale Securities Adjustment Net Of Tax Gross unrealized holding loss on held-to-maturity securities Other Comprehensive Income Reclassification Adjustment For Held To Maturity Transferred To Available For Sale Securities Before Tax Amortization of unrealized holding loss on held-to-maturity during the period Other Comprehensive Income Loss Transfers From Held To Maturity To Available For Sale Securities Net Of Tax Unrealized holding loss on held-to-maturity securities Other Comprehensive Income Loss From Held To Maturity To Available For Sale Securities Net Of Tax Lease. Lease. Lease [Table] Lease [Table] Long-Lived Tangible Asset Property Plant And Equipment By Type [Axis] Long-Lived Tangible Asset Property Plant And Equipment Type [Domain] Bank facility lease. Bank Facility Lease [Member] Bank Facility Lease [Member] Lease [Line Items] Lease [Line Items] Operating lease option to extend description Lessee Operating Lease Option To Extend Operating lease option to extend Lessee Operating Lease Existence Of Option To Extend Operating lease option to extend Lessee Operating Lease Renewal Term Operating lease payments Operating Lease Payments Original operating lease term Lessor Operating Lease Term Of Contract Operating lease renewal term Lessor Operating Lease Renewal Term Minimum future rents to be received under non-cancelable operating sublease agreements, 2022 Lessor Operating Lease Payments To Be Received Remainder Of Fiscal Year Minimum future rents to be received under non-cancelable operating sublease agreements, 2023 Lessor Operating Lease Payments To Be Received Next Twelve Months Lease asset. Lease liability. Operating lease right-of-use assets Operating Lease Right Of Use Asset Operating Lease, Right-of-Use Asset, Statement of Financial Position [Extensible Enumeration] Operating Lease Right Of Use Asset Statement Of Financial Position Extensible List Total lease assets Lease Asset Operating Operating Lease Liability Current Operating Lease, Liability, Statement of Financial Position [Extensible Enumeration] Operating Lease Liability Statement Of Financial Position Extensible List Operating Operating Lease Liability Noncurrent Total lease liabilities Lease Liability Operating lease costs Operating Lease Cost Variable lease cost Variable Lease Cost Lessee operating lease liability payments due after year four. Lease liability payments due. Lease liabilities payments due. Lease liability payments remainder of fiscal year. Lease liability payments due next twelve months. Lease liability payments due year two. Lease liability payments due year three. Lease Liability Payments Due Year four. Lease liability payments due after year four. Operating Leases Operating Lease Liabilities Payments Due [Abstract] Operating Leases, 2022 Lessee Operating Lease Liability Payments Remainder Of Fiscal Year Operating Leases, 2023 Lessee Operating Lease Liability Payments Due Next Twelve Months Operating Leases, 2024 Lessee Operating Lease Liability Payments Due Year Two Operating Leases, 2025 Lessee Operating Lease Liability Payments Due Year Three Operating Leases, 2026 Lessee Operating Lease Liability Payments Due Year Four Operating Leases, After 2026 Lessee Operating Lease Liability Payments Due After Year Four Operating Leases, Total lease payments Lessee Operating Lease Liability Payments Due Operating Leases, Less: Interest Lessee Operating Lease Liability Undiscounted Excess Amount Operating Leases, Present value of lease liabilities Operating Lease Liability Lease liability undiscounted excess amount. Total Lease Liabilities Payments Due [Abstract] Lease liability, 2022 Lease Liability Payments Remainder Of Fiscal Year Lease liability, 2023 Lease Liability Payments Due Next Twelve Months Lease liability, 2024 Lease Liability Payments Due Year Two Lease liability, 2025 Lease Liability Payments Due Year Three Lease liability, 2026 Lease Liability Payments Due Year Four Lease liability, After 2026 Lease Liability Payments Due After Year Four Lease liability, Total lease payments Lease Liability Payments Due Lease liability, Less: Interest Lease Liability Undiscounted Excess Amount Lease liability, Present value of lease liabilities Operating lease payments related to options to extend lease. Operating lease payments related to option to extend lease Operating Lease Payments Related To Options To Extend Lease Current portion of operating lease liability Operating leases, weighted-average remaining lease term (years) Operating Lease Weighted Average Remaining Lease Term1 Operating leases, weighted-average discount rate Operating Lease Weighted Average Discount Rate Percent Debt Instrument [Table] Debt Instrument [Table] Debt Instrument Debt Instrument [Axis] Debt Instrument, Name Debt Instrument Name [Domain] Notes due june thirty two thousand twenty nine. 2029 Notes [Member] Notes Due June Thirty Two Thousand Twenty Nine [Member] Notes due july one two thousand thirty one. 2031 Notes [Member] Notes Due July One Two Thousand Thirty One [Member] Three month SOFR. Three-month SOFR [Member] Three Month S O F R [Member] Three-month LIBOR. Three-month LIBOR [Member] Three Month L I B O R [Member] Debt Instrument [Line Items] Debt Instrument [Line Items] Notes, interest rate Notes, maturity date Debt Instrument Maturity Date Notes, term Notes, basis points payable Notes, interest payment terms Debt Instrument Payment Terms Subsequent Event [Table] Subsequent Event [Table] Subsequent Event [Line Items] Subsequent Event [Line Items]