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Receivable, Modified [Table] (Decrease) increase in borrowings Proceeds from (Repayments of) Debt Debt instrument, basis spread on variable rate (percent) Debt Instrument, Basis Spread on Variable Rate City Area Code City Area Code Nonaccrual With No ACL Financing Receivable, Excluding Accrued Interest, Nonaccrual, No Allowance Marketing expense Marketing Expense Accumulated Other Comprehensive Income (Loss), net of Tax AOCI Attributable to Parent [Member] Northrim Bancorp, Inc. Northrim Bancorp, Inc. [Member] Northrim Bancorp, Inc. 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Equity Securities, FV-NI, Gain (Loss)  Retained Earnings Retained Earnings [Member] Net deferred origination fees Financing Receivable, Unamortized Loan Cost (Fee) Erroneously Awarded Compensation Recovery Erroneously Awarded Compensation Recovery [Table] Increase (Decrease) in Stockholders' Equity [Roll Forward] Increase (Decrease) in Stockholders' Equity [Roll Forward] Common stock, shares outstanding (in shares) Common Stock, Shares, Outstanding Award Timing Disclosures [Line Items] Schedule of Estimated Fair Values Fair Value, by Balance Sheet Grouping [Table Text Block] Financing Receivable, Past Due [Line Items] Financing Receivable, Past Due [Line Items] Corporate bonds Corporate Debt Securities [Member] Earnings Per Share, Diluted (in USD per share) Earnings Per Share, Diluted Entity Current Reporting Status Entity Current Reporting Status Net Cash Provided by Financing Activities Cash Provided by (Used in) Financing Activity, Including Discontinued Operation Internal Credit 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Assets [Table Text Block] Purchased receivable income Income, Purchased Receivables Income, Purchased Receivables Subordinated Borrowing [Table] Subordinated Borrowing [Table] Weighted-Average Term Extension (months) Financing Receivable, Modified, Weighted-Average Term Increase from Modification More than 12 months, unrealized losses Debt Securities, Held-to-Maturity, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss Financing Activities: Cash Provided by (Used in) Financing Activity, Including Discontinued Operation [Abstract] Bankcard fees and Service charges on deposit accounts Revenue from Contract with Customer, Excluding Assessed Tax Premises and equipment, net Property, Plant, and Equipment, after Accumulated Depreciation, Depletion, and Amortization Financial Instruments [Domain] Financial Instruments [Domain] 5-10 years Debt Securities, Available-for-Sale And Held-to-maturity, Maturity, Allocated And Single Maturity Date, Rolling After Five Through 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Through Rate [Member] Total tax-exempt interest income Interest Income, Securities, Operating, Tax Exempt Impact on fair value from 25% adverse change Sensitivity Analysis of Fair Value, Transferor's Interests in Transferred Financial Assets, Impact of 25 Percent Adverse Change in Prepayment Speed Sensitivity Analysis of Fair Value, Transferor's Interests in Transferred Financial Assets, Impact of 25 Percent Adverse Change in Prepayment Speed More than 12 months, unrealized losses Debt Securities, Available-for-Sale, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss Equity Components [Axis] Equity Components [Axis] Product and Service [Domain] Product and Service [Domain] Other loans Other Loans Portfolio Segment [Member] Other Loans Portfolio Segment Income taxes paid Income Tax Paid, after Refund Received Entity Interactive Data Current Entity Interactive Data Current Number of branches Number of Stores Impact on fair value from 10% adverse change Sensitivity Analysis of Fair Value, Transferor's Interests in Transferred Financial Assets, Impact of 10 Percent Adverse Change in Prepayment Speed Compensation Actually Paid vs. Other Measure Compensation Actually Paid vs. Other Measure [Text Block] Gain (loss) on derivatives not designated as hedging Derivative Instruments Not Designated as Hedging Instruments, Gain (Loss), Net Entity Small Business Entity Small Business Comprehensive income Comprehensive Income (Loss), Net of Tax, Attributable to Parent 2029 Lessee, Operating Lease, Liability, to be Paid, Year Three Termination Date Trading Arrangement Termination Date Subsequent Events [Abstract] Subsequent Events [Abstract] Fair Value, Recurring and Nonrecurring [Table] Fair Value, Recurring and Nonrecurring [Table] Compensation Actually Paid vs. Total Shareholder Return Compensation Actually Paid vs. Total Shareholder Return [Text Block] Term and payment modifications Payment Deferral And Extended Maturity [Member] Payment Deferral And 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mortgage servicing revenue, net Interest and Fee Income, Loans, Mortgage Servicing, Net Interest and Fee Income, Loans, Mortgage Servicing, Net Redemption price, percentage Debt Instrument, Redemption Price, Percentage Allowance for Credit Losses Debt Securities, Available-for-Sale, Allowance for Credit Loss, Excluding Accrued Interest Gross Unrealized Losses on Available For Sale Securities and the Fair Value Debt Securities, Available-for-Sale, Unrealized Loss Position, Fair Value [Table Text Block] Other loans Unallocated Financing Receivables [Member] Purchases of FHLB stock Payments For Purchase Of Federal Home Loan Bank Stock Payments For Purchase Of Federal Home Loan Bank Stock Pay vs Performance Disclosure, Table Pay vs Performance [Table Text Block] Arrangement Duration Trading Arrangement Duration Subsequent Event [Line Items] Subsequent Event [Line Items] Statement of Stockholders' Equity [Abstract] Statement of Stockholders' Equity [Abstract] Local Phone Number Local Phone Number Junior subordinated debentures Junior Subordinated Debentures, Fair Value Disclosure Junior Subordinated Debentures, Fair Value Disclosure Difference Financing Receivable, Unamortized Loan Cost (Fee) and Purchase Premium (Discount) Consolidation Items [Axis] Consolidation Items [Axis] Entity Address, Postal Zip Code Entity Address, Postal Zip Code Entity Registrant Name Entity Registrant Name Less than 12 months, unrealized losses Debt Securities, Available-for-Sale, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss Financing receivable, modified Financing Receivable, Excluding Accrued Interest, Modified, Accumulated Income Before Provision for Income Taxes Income (Loss) from Continuing Operations before Income Taxes, Noncontrolling Interest Insider Trading Policies and Procedures Not Adopted Insider Trading Policies and Procedures Not Adopted [Text Block] Revenues Revenues Securities available for sale: OCI, Debt Securities, Available-for-Sale, Gain 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Measure Name Interest on investment securities available for sale Interest Income, Debt Securities, Available-for-Sale, Operating Pay vs Performance Disclosure [Line Items] Fair Value Hierarchy and NAV [Domain] Fair Value Hierarchy and NAV [Domain] Other real estate owned, net Real Estate Acquired Through Foreclosure Demand Demand Deposit Accounts Number of available-for-sale securities in an unrealized loss position without an ACL for less than twelve months Debt Securities, Available-for-Sale, Continuous Unrealized Loss Position, Less than 12 Months, Number of Positions Pay vs Performance Disclosure Pay vs Performance Disclosure [Table] Investment in securities: Payments for (Proceeds from) Investments in Securities [Abstract] Payments for (Proceeds from) Investments in Securities [Abstract] Loans Insured or Guaranteed by Government Authorities [Axis] Loans Insured or Guaranteed by Government Authorities [Axis] Interest and fees on loans and loans held for sale Interest and Fee Income, Financing Receivable Junior subordinated notes Junior Subordinated Notes Additional Paid-in Capital Additional Paid-in Capital [Member] Entity Filer Category Entity Filer Category Fair Value Debt Securities, Available-for-Sale, Unrealized Loss Position Increase in loans, net Payment for Acquisition, Loan, Held-for-Investment Insurance expense General Insurance Expense Gain on sale of loans Payments for (Proceeds from) Other Loans and Leases Offsetting Liabilities Offsetting Liabilities [Table Text Block] Within 1 year Debt Securities, Available-for-Sale, Maturity, Allocated and Single Maturity Date, Rolling within One Year, Amortized Cost Name Trading Arrangement, Individual Name Financing Receivable, Nonaccrual [Line Items] Financing Receivable, Nonaccrual [Line Items] Debt instrument, interest rate during period (percent) Debt Instrument, Interest Rate During Period Interest expense on subordinated debentures Interest Expense, Subordinated Notes and Debentures Company Selected Measure Amount Company Selected Measure Amount Financial Asset, Period Past Due [Axis] Financial Asset, Aging [Axis] Not Designated as Hedging Instrument Not Designated as Hedging Instrument [Member] Unrealized gain (loss) on marketable equity securities Unrealized (loss) gain on marketable equity securities Equity Securities, FV-NI, Unrealized Gain (Loss) Less: Segment Reporting, Reconciliation of Other Item by Segment to Consolidated [Abstract] Investments, Debt and Equity Securities [Abstract] Deposits: Deposits [Abstract] Discount rate Servicing Assets and Servicing Liabilities at Fair Value, Assumptions Used to Estimate Fair Value, Discount Rate Gross Realized and Unrealized Gains (Losses) on Marketable Equity Securities Gain (Loss) on Securities [Table Text Block] Net change in unrealized gains (losses) relating to items held at end of period Fair Value, Asset, Recurring Basis, Still Held, Unrealized Gain (Loss) Fair Value, Asset, Recurring Basis, Unobservable Input Reconciliation, Gain (Loss), Statement of Income or Comprehensive Income [Extensible Enumeration] Fair Value, Asset, Recurring Basis, Unobservable Input Reconciliation, Gain (Loss), Statement of Income or Comprehensive Income [Extensible Enumeration] Exercise of stock options and vesting of restricted stock units, net (in shares) Shares Issued, Shares, Share-Based Payment Arrangement, after Forfeiture Schedule of Accounts, Notes, Loans and Financing Receivable [Table] Accounts and Financing Receivables [Table] Weighted average lease term - operating leases, in years Operating Lease, Weighted Average Remaining Lease Term Non-PEO NEO Non-PEO NEO [Member] Entity Address, Address Line One Entity Address, Address Line One Non-cash lease liability arising from obtaining right of use assets Right-of-Use Asset Obtained in Exchange for Operating Lease Liability Provision for income taxes Provision (benefit) for income taxes Income Tax Expense (Benefit) Total Other Operating Expense Noninterest Expense Collateralized loan obligations Collateralized Loan Obligations [Member] Noncash commitments to invest in Low Income Housing Tax Credit Partnerships Non Cash Commitment To Invest In Low Income Housing Tax Credit Partnerships Non Cash Commitment To Invest In Low Income Housing Tax Credit Partnerships Award Timing Method Award Timing Method [Text Block] Obligations of states and political subdivisions in the US Government Portfolio Segment [Member] Government Portfolio Segment Consolidation Consolidation, Policy [Policy Text Block] Net Change in Cash and Cash Equivalents Cash, Cash Equivalent, Restricted Cash, and Restricted Cash Equivalent, Period Increase (Decrease), Including Exchange Rate Effect and Discontinued Operation Charge-offs Total Financing Receivable, Excluding Accrued Interest, Allowance for Credit Loss, Writeoff Forgone Recovery, Explanation of Impracticability Forgone Recovery, Explanation of Impracticability [Text Block] 1-4 family residential properties secured by first liens Properties Secured By First Liens [Member] Properties Secured By First Liens Servicing Rights Transfers and Servicing of Financial Assets [Text Block] Weighted average rate of note (percent) Mortgage Loans Serviced By Third Party, Weighted Average Rate Of Note Mortgage Loans Serviced By Third Party, Weighted Average Rate Of Note Net Income Net income Net income Net Income (Loss) Attributable to Parent Long-term Debt, Type [Axis] Long-Term Debt, Type [Axis] Erroneous Compensation Analysis Erroneous Compensation Analysis [Text Block] Loan Restructuring Modification [Domain] Loan Restructuring Modification [Domain] Discounted cash flow Valuation Technique, Discounted Cash Flow [Member] Location, Statement of Financial Position, Balance [Axis] Location, Statement of Financial Position, Balance [Axis] Statement [Table] Statement [Table] Financing Receivable, Past Due [Table] Financing Receivable, Past Due [Table] Agricultural production, including commercial fishing Agricultural Production Porfolio Segment [Member] Agricultural Production Porfolio Segment Restatement Determination Date: Restatement Determination Date [Axis] 2025/2024 Financing Receivable, Excluding Accrued Interest, Year Two, Originated, Fiscal Year before Current Fiscal Year Loans on Nonaccrual Status Financing Receivable, Nonaccrual [Table Text Block] Derivative contracts Derivative assets Gross amounts of recognized assets and liabilities Derivative Asset, Subject to Master Netting Arrangement, before Offset Loans held for sale Loan, Held-for-Sale, Fair Value Disclosure Sales and settlements Fair Value, Measurement With Unobservable Inputs Reconciliation, Recurring Basis, Asset, Sales And Settlements Fair Value, Measurement With Unobservable Inputs Reconciliation, Recurring Basis, Asset, Sales And Settlements Recoveries Accounts Receivable, Allowance for Credit Loss, Recovery Collateral posted Collateral Already Posted, Aggregate Fair Value Basis of Presentation and Significant Accounting Policies Basis of Presentation and Significant Accounting Policies [Text Block] Pension Benefits Adjustments, Footnote Pension Benefits Adjustments, Footnote [Text Block] Derivative Instruments and Hedging Activities Disclosure [Abstract] Derivative Instruments and Hedging Activities Disclosure [Abstract] Secured Overnight Financing Rate (SOFR) [Member]