$NRIM
NORTHRIM BANCORP INC Stock $nrim

$nrim Overview Financials Valuation SEC Filings Company Website

2020 Q4 Form 10-K Financial Statement

#000116337021000012 Filed on March 05, 2021

Income Statement

Concept	2020 Q4	2019 Q4	2019 Q3
Revenue	$20.58M	$18.06M	$17.84M
YoY Change	13.94%	4.97%	7.58%
Cost Of Revenue
YoY Change
Gross Profit
YoY Change
Gross Profit Margin
Selling, General & Admin
YoY Change
% of Gross Profit
Research & Development
YoY Change
% of Gross Profit
Depreciation & Amortization	$1.100M	$1.000M	$1.100M
YoY Change	10.0%	-9.09%	22.22%
% of Gross Profit
Operating Expenses
YoY Change
Operating Profit
YoY Change
Interest Expense	$1.355M	$1.652M	$1.531M
YoY Change	-17.98%	54.39%	101.18%
% of Operating Profit
Other Income/Expense, Net
YoY Change
Pretax Income	$13.41M	$5.680M	$9.566M
YoY Change	136.06%	-1.3%	49.63%
Income Tax	$3.308M	$1.100M	$2.028M
% Of Pretax Income	24.67%	19.37%	21.2%
Net Earnings	$10.10M	$4.580M	$7.538M
YoY Change	120.52%	-5.53%	43.2%
Net Earnings / Revenue	49.08%	25.36%	42.26%
Basic Earnings Per Share	$1.62	$0.70	$1.13
Diluted Earnings Per Share	$1.59	$0.69	$1.11
COMMON SHARES
Basic Shares Outstanding	6.234M shares	6.540M shares	6.604M shares
Diluted Shares Outstanding			6.708M shares

Balance Sheet

Concept	2020 Q4	2019 Q4	2019 Q3
SHORT-TERM ASSETS
Cash & Short-Term Investments		$379.5M
YoY Change		6.48%
Cash & Equivalents	$116.0M	$95.42M	$92.19M
Short-Term Investments		$284.1M
Other Short-Term Assets
YoY Change
Inventory
Prepaid Expenses
Receivables
Other Receivables
Total Short-Term Assets
YoY Change
LONG-TERM ASSETS
Property, Plant & Equipment	$38.10M	$38.42M	$38.56M
YoY Change	-0.83%	-1.71%	-0.21%
Goodwill	$15.02M	$15.02M	$15.02M
YoY Change	0.0%	0.0%	0.0%
Intangibles	$1.029M	$1.077M	$1.092M
YoY Change	-4.46%	-5.28%	-5.37%
Long-Term Investments	$2.462M	$2.232M
YoY Change	10.3%	-1.2%
Other Assets
YoY Change
Total Long-Term Assets
YoY Change
TOTAL ASSETS
Total Short-Term Assets
Total Long-Term Assets
Total Assets	$2.122B	$1.644B	$1.617B
YoY Change	29.06%	9.38%	7.58%
SHORT-TERM LIABILITIES
YoY Change
Accounts Payable
YoY Change
Accrued Expenses	$12.40M	$14.20M	$14.20M
YoY Change	-12.68%
Deferred Revenue
YoY Change
Short-Term Debt		$0.00	$0.00
YoY Change		-100.0%	-100.0%
Long-Term Debt Due
YoY Change
Total Short-Term Liabilities	$12.40M	$14.20M	$14.20M
YoY Change	-12.68%	-58.6%	-56.17%
LONG-TERM LIABILITIES
Long-Term Debt	$10.30M	$10.30M	$10.30M
YoY Change	0.0%	0.0%	0.0%
Other Long-Term Liabilities	$37.70M	$31.10M	$28.10M
YoY Change	21.22%	81.87%	74.53%
Total Long-Term Liabilities	$48.00M	$41.40M	$38.40M
YoY Change	15.94%	51.09%	45.45%
TOTAL LIABILITIES
Total Short-Term Liabilities	$12.40M	$14.20M	$14.20M
Total Long-Term Liabilities	$48.00M	$41.40M	$38.40M
Total Liabilities	$1.900B	$1.437B	$1.413B
YoY Change	32.25%	10.78%	8.71%
SHAREHOLDERS EQUITY
Retained Earnings	$173.5M	$149.6M	$147.2M
YoY Change	15.96%	8.85%	9.47%
Common Stock	$6.251M	$6.559M	$6.540M
YoY Change	-4.7%	-4.71%	-5.0%
Preferred Stock
YoY Change
Treasury Stock (at cost)
YoY Change
Treasury Stock Shares
Shareholders Equity	$221.6M	$207.1M	$204.0M
YoY Change
Total Liabilities & Shareholders Equity	$2.122B	$1.644B	$1.617B
YoY Change	29.06%	9.38%	7.58%

Cashflow Statement

Concept	2020 Q4	2019 Q4	2019 Q3
OPERATING ACTIVITIES
Net Income	$10.10M	$4.580M	$7.538M
YoY Change	120.52%	-5.53%	43.2%
Depreciation, Depletion And Amortization	$1.100M	$1.000M	$1.100M
YoY Change	10.0%	-9.09%	22.22%
Cash From Operating Activities	-$9.500M	$21.50M	-$4.500M
YoY Change	-144.19%	-21.53%	-139.82%
INVESTING ACTIVITIES
Capital Expenditures	-$700.0K	-$900.0K	-$300.0K
YoY Change	-22.22%	-47.06%	-76.92%
Acquisitions
YoY Change
Other Investing Activities	$8.400M	-$36.50M	-$28.20M
YoY Change	-123.01%	192.0%	314.71%
Cash From Investing Activities	$7.900M	-$37.40M	-$28.50M
YoY Change	-121.12%	161.54%	251.85%
FINANCING ACTIVITIES
Cash Dividend Paid
YoY Change
Common Stock Issuance & Retirement, Net
YoY Change
Debt Paid & Issued, Net
YoY Change
Cash From Financing Activities	16.40M	19.10M	54.40M
YoY Change	-14.14%	-435.09%	76.62%
NET CHANGE
Cash From Operating Activities	-9.500M	21.50M	-4.500M
Cash From Investing Activities	7.900M	-37.40M	-28.50M
Cash From Financing Activities	16.40M	19.10M	54.40M
Net Change In Cash	14.80M	3.200M	21.40M
YoY Change	362.5%	-56.76%	-37.06%
FREE CASH FLOW
Cash From Operating Activities	-$9.500M	$21.50M	-$4.500M
Capital Expenditures	-$700.0K	-$900.0K	-$300.0K
Free Cash Flow	-$8.800M	$22.40M	-$4.200M
YoY Change	-139.29%	-23.02%	-133.33%

Facts In Submission

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CY2020	dei	Entity Central Index Key EntityCentralIndexKey	0001163370
CY2020	dei	Document Fiscal Year Focus DocumentFiscalYearFocus	2020
CY2020	dei	Document Fiscal Period Focus DocumentFiscalPeriodFocus	FY
CY2020	dei	Trading Symbol TradingSymbol	NRIM
CY2019	us-gaap	Accounting Standards Update Extensible List AccountingStandardsUpdateExtensibleList	us-gaap:AccountingStandardsUpdate201609Member
CY2020	dei	Document Type DocumentType	10-K
CY2020	dei	Document Annual Report DocumentAnnualReport	true
CY2020	dei	Document Period End Date DocumentPeriodEndDate	2020-12-31
CY2020	dei	Current Fiscal Year End Date CurrentFiscalYearEndDate	--12-31
CY2020	dei	Document Transition Report DocumentTransitionReport	false
CY2020	dei	Entity File Number EntityFileNumber	000-33501
CY2020	dei	Entity Registrant Name EntityRegistrantName	NORTHRIM BANCORP, INC.
CY2020	dei	Entity Incorporation State Country Code EntityIncorporationStateCountryCode	AK
CY2020	dei	Entity Tax Identification Number EntityTaxIdentificationNumber	92-0175752
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CY2020	dei	Entity Address City Or Town EntityAddressCityOrTown	Anchorage
CY2020	dei	Entity Address State Or Province EntityAddressStateOrProvince	AK
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CY2020	dei	Security12g Title Security12gTitle	Common Stock, $1.00 par value
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CY2018	us-gaap	Equity Securities Fv Ni Unrealized Gain Loss EquitySecuritiesFvNiUnrealizedGainLoss	-625000	USD
CY2020	us-gaap	Debt Securities Available For Sale Realized Gain DebtSecuritiesAvailableForSaleRealizedGain	0	USD
CY2019	us-gaap	Debt Securities Available For Sale Realized Gain DebtSecuritiesAvailableForSaleRealizedGain	23000	USD
CY2018	us-gaap	Debt Securities Available For Sale Realized Gain DebtSecuritiesAvailableForSaleRealizedGain	0	USD
CY2020	us-gaap	Noninterest Income Other Operating Income NoninterestIncomeOtherOperatingIncome	2469000	USD
CY2019	us-gaap	Noninterest Income Other Operating Income NoninterestIncomeOtherOperatingIncome	2819000	USD
CY2018	us-gaap	Noninterest Income Other Operating Income NoninterestIncomeOtherOperatingIncome	2868000	USD
CY2020	us-gaap	Noninterest Income NoninterestIncome	63328000	USD
CY2019	us-gaap	Noninterest Income NoninterestIncome	37346000	USD
CY2018	us-gaap	Noninterest Income NoninterestIncome	32167000	USD
CY2020	us-gaap	Labor And Related Expense LaborAndRelatedExpense	61137000	USD
CY2019	us-gaap	Labor And Related Expense LaborAndRelatedExpense	51317000	USD
CY2018	us-gaap	Labor And Related Expense LaborAndRelatedExpense	44650000	USD
CY2020	us-gaap	Information Technology And Data Processing InformationTechnologyAndDataProcessing	7668000	USD
CY2019	us-gaap	Information Technology And Data Processing InformationTechnologyAndDataProcessing	7128000	USD
CY2018	us-gaap	Information Technology And Data Processing InformationTechnologyAndDataProcessing	6035000	USD
CY2020	us-gaap	Occupancy Net OccupancyNet	6624000	USD
CY2019	us-gaap	Occupancy Net OccupancyNet	6607000	USD
CY2018	us-gaap	Occupancy Net OccupancyNet	6136000	USD
CY2020	us-gaap	Professional Fees ProfessionalFees	3157000	USD
CY2019	us-gaap	Professional Fees ProfessionalFees	2531000	USD
CY2018	us-gaap	Professional Fees ProfessionalFees	2453000	USD
CY2020	us-gaap	Marketing Expense MarketingExpense	2320000	USD
CY2019	us-gaap	Marketing Expense MarketingExpense	2373000	USD
CY2018	us-gaap	Marketing Expense MarketingExpense	2318000	USD
CY2020	us-gaap	General Insurance Expense GeneralInsuranceExpense	1228000	USD
CY2019	us-gaap	General Insurance Expense GeneralInsuranceExpense	557000	USD
CY2018	us-gaap	General Insurance Expense GeneralInsuranceExpense	862000	USD
CY2020	us-gaap	Amortization Of Intangible Assets AmortizationOfIntangibleAssets	48000	USD
CY2019	us-gaap	Amortization Of Intangible Assets AmortizationOfIntangibleAssets	60000	USD
CY2018	us-gaap	Amortization Of Intangible Assets AmortizationOfIntangibleAssets	70000	USD
CY2020	nrim	Compensation Expense Acquisition Payments CompensationExpenseAcquisitionPayments	0	USD
CY2019	nrim	Compensation Expense Acquisition Payments CompensationExpenseAcquisitionPayments	468000	USD
CY2018	nrim	Compensation Expense Acquisition Payments CompensationExpenseAcquisitionPayments	0	USD
CY2020	us-gaap	Income Loss From Equity Method Investments IncomeLossFromEquityMethodInvestments	0	USD
CY2019	us-gaap	Income Loss From Equity Method Investments IncomeLossFromEquityMethodInvestments	0	USD
CY2018	us-gaap	Income Loss From Equity Method Investments IncomeLossFromEquityMethodInvestments	-804000	USD
CY2020	nrim	Other Real Estate Owned Expense Net Including Impairment OtherRealEstateOwnedExpenseNetIncludingImpairment	-242000	USD
CY2019	nrim	Other Real Estate Owned Expense Net Including Impairment OtherRealEstateOwnedExpenseNetIncludingImpairment	-193000	USD
CY2018	nrim	Other Real Estate Owned Expense Net Including Impairment OtherRealEstateOwnedExpenseNetIncludingImpairment	258000	USD
CY2020	us-gaap	Other Noninterest Expense OtherNoninterestExpense	7174000	USD
CY2019	us-gaap	Other Noninterest Expense OtherNoninterestExpense	5990000	USD
CY2018	us-gaap	Other Noninterest Expense OtherNoninterestExpense	6214000	USD
CY2020	us-gaap	Noninterest Expense NoninterestExpense	89114000	USD
CY2019	us-gaap	Noninterest Expense NoninterestExpense	76838000	USD
CY2018	us-gaap	Noninterest Expense NoninterestExpense	69800000	USD
CY2020	us-gaap	Income Loss From Continuing Operations Before Income Taxes Minority Interest And Income Loss From Equity Method Investments IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments	42447000	USD
CY2019	us-gaap	Income Loss From Continuing Operations Before Income Taxes Minority Interest And Income Loss From Equity Method Investments IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments	26125000	USD
CY2018	us-gaap	Income Loss From Continuing Operations Before Income Taxes Minority Interest And Income Loss From Equity Method Investments IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments	24075000	USD
CY2020	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	9559000	USD
CY2019	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	5434000	USD
CY2018	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	4071000	USD
CY2020	us-gaap	Net Income Loss NetIncomeLoss	32888000	USD
CY2019	us-gaap	Net Income Loss NetIncomeLoss	20691000	USD
CY2018	us-gaap	Net Income Loss NetIncomeLoss	20004000	USD
CY2020	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	5.18
CY2019	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	3.08
CY2018	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	2.91
CY2020	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	5.11
CY2019	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	3.04
CY2018	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	2.86
CY2020	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	6354687	shares
CY2019	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	6708622	shares
CY2018	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	6877573	shares
CY2020	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	6431367	shares
CY2019	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	6808209	shares
CY2018	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	6981557	shares
CY2020	us-gaap	Net Income Loss NetIncomeLoss	32888000	USD
CY2018	us-gaap	Other Comprehensive Income Loss Tax Portion Attributable To Parent1 OtherComprehensiveIncomeLossTaxPortionAttributableToParent1	-210000	USD
CY2020	us-gaap	Other Comprehensive Income Loss Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent	-413000	USD
CY2019	us-gaap	Net Income Loss NetIncomeLoss	20691000	USD
CY2018	us-gaap	Net Income Loss NetIncomeLoss	20004000	USD
CY2020	us-gaap	Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Before Tax OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodBeforeTax	411000	USD
CY2019	us-gaap	Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Before Tax OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodBeforeTax	2866000	USD
CY2018	us-gaap	Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Before Tax OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodBeforeTax	-692000	USD
CY2020	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci For Sale Of Securities Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForSaleOfSecuritiesTax	0	USD
CY2019	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci For Sale Of Securities Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForSaleOfSecuritiesTax	7000	USD
CY2018	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci For Sale Of Securities Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForSaleOfSecuritiesTax	0	USD
CY2020	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci For Sale Of Securities Net Of Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForSaleOfSecuritiesNetOfTax	0	USD
CY2019	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci For Sale Of Securities Net Of Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForSaleOfSecuritiesNetOfTax	16000	USD
CY2018	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci For Sale Of Securities Net Of Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForSaleOfSecuritiesNetOfTax	0	USD
CY2020	us-gaap	Other Comprehensive Income Loss Cash Flow Hedge Gain Loss Before Reclassification And Tax OtherComprehensiveIncomeLossCashFlowHedgeGainLossBeforeReclassificationAndTax	-1201000	USD
CY2019	us-gaap	Other Comprehensive Income Loss Cash Flow Hedge Gain Loss Before Reclassification And Tax OtherComprehensiveIncomeLossCashFlowHedgeGainLossBeforeReclassificationAndTax	-1142000	USD
CY2018	us-gaap	Other Comprehensive Income Loss Cash Flow Hedge Gain Loss Before Reclassification And Tax OtherComprehensiveIncomeLossCashFlowHedgeGainLossBeforeReclassificationAndTax	423000	USD
CY2020	us-gaap	Other Comprehensive Income Loss Tax Portion Attributable To Parent1 OtherComprehensiveIncomeLossTaxPortionAttributableToParent1	-377000	USD
CY2019	us-gaap	Other Comprehensive Income Loss Tax Portion Attributable To Parent1 OtherComprehensiveIncomeLossTaxPortionAttributableToParent1	757000	USD
CY2019	us-gaap	Other Comprehensive Income Loss Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent	951000	USD
CY2019	us-gaap	Other Comprehensive Income Loss Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent	951000	USD
CY2018	us-gaap	Other Comprehensive Income Loss Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent	-59000	USD
CY2020	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	32475000	USD
CY2019	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	21642000	USD
CY2018	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	19945000	USD
CY2017Q4	us-gaap	Stockholders Equity StockholdersEquity	192802000	USD
CY2018	us-gaap	Dividends Cash DividendsCash	7088000	USD
CY2018	us-gaap	Adjustments To Additional Paid In Capital Sharebased Compensation Requisite Service Period Recognition Value AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue	816000	USD
CY2018	us-gaap	Stock Issued During Period Value Share Based Compensation StockIssuedDuringPeriodValueShareBasedCompensation	28000	USD
CY2018	us-gaap	Stock Repurchased During Period Value StockRepurchasedDuringPeriodValue	494000	USD
CY2018	us-gaap	Other Comprehensive Income Loss Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent	-59000	USD
CY2018	us-gaap	Net Income Loss NetIncomeLoss	20004000	USD
CY2018Q4	us-gaap	Stockholders Equity StockholdersEquity	205947000	USD
CY2019	us-gaap	Dividends Cash DividendsCash	8528000	USD
CY2019	us-gaap	Adjustments To Additional Paid In Capital Sharebased Compensation Requisite Service Period Recognition Value AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue	832000	USD
CY2019	us-gaap	Stock Issued During Period Value Share Based Compensation StockIssuedDuringPeriodValueShareBasedCompensation	-207000	USD
CY2019	us-gaap	Stock Repurchased During Period Value StockRepurchasedDuringPeriodValue	12569000	USD
CY2019	us-gaap	Net Income Loss NetIncomeLoss	20691000	USD
CY2019Q4	us-gaap	Stockholders Equity StockholdersEquity	207117000	USD
CY2020	us-gaap	Dividends Cash DividendsCash	8866000	USD
CY2020	us-gaap	Adjustments To Additional Paid In Capital Sharebased Compensation Requisite Service Period Recognition Value AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue	943000	USD
CY2020	us-gaap	Stock Issued During Period Value Share Based Compensation StockIssuedDuringPeriodValueShareBasedCompensation	-118000	USD
CY2020	us-gaap	Stock Repurchased During Period Value StockRepurchasedDuringPeriodValue	9976000	USD
CY2020	us-gaap	Other Comprehensive Income Loss Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent	-413000	USD
CY2020	us-gaap	Net Income Loss NetIncomeLoss	32888000	USD
CY2020Q4	us-gaap	Stockholders Equity StockholdersEquity	221575000	USD
CY2020	us-gaap	Net Income Loss NetIncomeLoss	32888000	USD
CY2019	us-gaap	Net Income Loss NetIncomeLoss	20691000	USD
CY2018	us-gaap	Net Income Loss NetIncomeLoss	20004000	USD
CY2020	us-gaap	Gain Loss On Sale Of Investments GainLossOnSaleOfInvestments	98000	USD
CY2019	us-gaap	Gain Loss On Sale Of Investments GainLossOnSaleOfInvestments	23000	USD
CY2018	us-gaap	Gain Loss On Sale Of Investments GainLossOnSaleOfInvestments	0	USD
CY2020	us-gaap	Gain Loss On Sale Of Property Plant Equipment GainLossOnSaleOfPropertyPlantEquipment	-22000	USD
CY2019	us-gaap	Gain Loss On Sale Of Property Plant Equipment GainLossOnSaleOfPropertyPlantEquipment	0	USD
CY2018	us-gaap	Gain Loss On Sale Of Property Plant Equipment GainLossOnSaleOfPropertyPlantEquipment	-2000	USD
CY2020	us-gaap	Other Depreciation And Amortization OtherDepreciationAndAmortization	3147000	USD
CY2019	us-gaap	Other Depreciation And Amortization OtherDepreciationAndAmortization	2986000	USD
CY2018	us-gaap	Other Depreciation And Amortization OtherDepreciationAndAmortization	2283000	USD
CY2020	us-gaap	Capitalized Computer Software Amortization1 CapitalizedComputerSoftwareAmortization1	1104000	USD
CY2019	us-gaap	Capitalized Computer Software Amortization1 CapitalizedComputerSoftwareAmortization1	1019000	USD
CY2018	us-gaap	Capitalized Computer Software Amortization1 CapitalizedComputerSoftwareAmortization1	911000	USD
CY2020	us-gaap	Amortization Of Intangible Assets AmortizationOfIntangibleAssets	48000	USD
CY2019	us-gaap	Amortization Of Intangible Assets AmortizationOfIntangibleAssets	60000	USD
CY2018	us-gaap	Amortization Of Intangible Assets AmortizationOfIntangibleAssets	70000	USD
CY2020	us-gaap	Accretion Amortization Of Discounts And Premiums Investments AccretionAmortizationOfDiscountsAndPremiumsInvestments	-19000	USD
CY2019	us-gaap	Accretion Amortization Of Discounts And Premiums Investments AccretionAmortizationOfDiscountsAndPremiumsInvestments	15000	USD
CY2018	us-gaap	Accretion Amortization Of Discounts And Premiums Investments AccretionAmortizationOfDiscountsAndPremiumsInvestments	-199000	USD
CY2020	us-gaap	Increase Decrease In Equity Securities Fv Ni IncreaseDecreaseInEquitySecuritiesFvNi	61000	USD
CY2019	us-gaap	Increase Decrease In Equity Securities Fv Ni IncreaseDecreaseInEquitySecuritiesFvNi	911000	USD
CY2018	us-gaap	Increase Decrease In Equity Securities Fv Ni IncreaseDecreaseInEquitySecuritiesFvNi	-625000	USD
CY2020	us-gaap	Increase Decrease In Deferred Income Taxes IncreaseDecreaseInDeferredIncomeTaxes	-555000	USD
CY2019	us-gaap	Increase Decrease In Deferred Income Taxes IncreaseDecreaseInDeferredIncomeTaxes	-711000	USD
CY2018	us-gaap	Increase Decrease In Deferred Income Taxes IncreaseDecreaseInDeferredIncomeTaxes	-3014000	USD
CY2020	us-gaap	Share Based Compensation ShareBasedCompensation	943000	USD
CY2019	us-gaap	Share Based Compensation ShareBasedCompensation	832000	USD
CY2018	us-gaap	Share Based Compensation ShareBasedCompensation	816000	USD
CY2020	us-gaap	Increase Decrease In Loans Deferred Income IncreaseDecreaseInLoansDeferredIncome	-6650000	USD
CY2019	us-gaap	Increase Decrease In Loans Deferred Income IncreaseDecreaseInLoansDeferredIncome	-598000	USD
CY2018	us-gaap	Increase Decrease In Loans Deferred Income IncreaseDecreaseInLoansDeferredIncome	-331000	USD
CY2020	us-gaap	Provision For Loan And Lease Losses ProvisionForLoanAndLeaseLosses	2432000	USD
CY2019	us-gaap	Provision For Loan And Lease Losses ProvisionForLoanAndLeaseLosses	-1175000	USD
CY2018	us-gaap	Provision For Loan And Lease Losses ProvisionForLoanAndLeaseLosses	-500000	USD
CY2020	nrim	Purchased Receivables Reserve Benefit PurchasedReceivablesReserveBenefit	-21000	USD
CY2019	nrim	Purchased Receivables Reserve Benefit PurchasedReceivablesReserveBenefit	-96000	USD
CY2018	nrim	Purchased Receivables Reserve Benefit PurchasedReceivablesReserveBenefit	-10000	USD
CY2020	nrim	Payments To Acquire Mortgage Servicing Rights Msr Operating Activities PaymentsToAcquireMortgageServicingRightsMSROperatingActivities	4824000	USD
CY2019	nrim	Payments To Acquire Mortgage Servicing Rights Msr Operating Activities PaymentsToAcquireMortgageServicingRightsMSROperatingActivities	3707000	USD
CY2018	nrim	Payments To Acquire Mortgage Servicing Rights Msr Operating Activities PaymentsToAcquireMortgageServicingRightsMSROperatingActivities	3641000	USD
CY2020	nrim	Increase Decreasein Fair Valueof Mortgage Servicing Asset IncreaseDecreaseinFairValueofMortgageServicingAsset	5526000	USD
CY2019	nrim	Increase Decreasein Fair Valueof Mortgage Servicing Asset IncreaseDecreaseinFairValueofMortgageServicingAsset	2608000	USD
CY2018	nrim	Increase Decreasein Fair Valueof Mortgage Servicing Asset IncreaseDecreaseinFairValueofMortgageServicingAsset	125000	USD
CY2020	nrim	Increase Decreasein Fair Valueof Commercial Servicing Assets IncreaseDecreaseinFairValueofCommercialServicingAssets	99000	USD
CY2019	nrim	Increase Decreasein Fair Valueof Commercial Servicing Assets IncreaseDecreaseinFairValueofCommercialServicingAssets	-6000	USD
CY2018	nrim	Increase Decreasein Fair Valueof Commercial Servicing Assets IncreaseDecreaseinFairValueofCommercialServicingAssets	-972000	USD
CY2020	us-gaap	Gain Loss On Sales Of Loans Net GainLossOnSalesOfLoansNet	46258000	USD
CY2019	us-gaap	Gain Loss On Sales Of Loans Net GainLossOnSalesOfLoansNet	19813000	USD
CY2018	us-gaap	Gain Loss On Sales Of Loans Net GainLossOnSalesOfLoansNet	14822000	USD
CY2020	us-gaap	Proceeds From Sale Of Loans Held For Sale ProceedsFromSaleOfLoansHeldForSale	1263325000	USD
CY2019	us-gaap	Proceeds From Sale Of Loans Held For Sale ProceedsFromSaleOfLoansHeldForSale	670986000	USD
CY2018	us-gaap	Proceeds From Sale Of Loans Held For Sale ProceedsFromSaleOfLoansHeldForSale	551607000	USD
CY2020	us-gaap	Payments For Origination Of Mortgage Loans Held For Sale PaymentsForOriginationOfMortgageLoansHeldForSale	1295411000	USD
CY2019	us-gaap	Payments For Origination Of Mortgage Loans Held For Sale PaymentsForOriginationOfMortgageLoansHeldForSale	684297000	USD
CY2018	us-gaap	Payments For Origination Of Mortgage Loans Held For Sale PaymentsForOriginationOfMortgageLoansHeldForSale	527516000	USD
CY2020	us-gaap	Gains Losses On Sales Of Other Real Estate GainsLossesOnSalesOfOtherRealEstate	391000	USD
CY2019	us-gaap	Gains Losses On Sales Of Other Real Estate GainsLossesOnSalesOfOtherRealEstate	380000	USD
CY2018	us-gaap	Gains Losses On Sales Of Other Real Estate GainsLossesOnSalesOfOtherRealEstate	3000	USD
CY2020	us-gaap	Equity Method Investment Other Than Temporary Impairment EquityMethodInvestmentOtherThanTemporaryImpairment	0	USD
CY2019	us-gaap	Equity Method Investment Other Than Temporary Impairment EquityMethodInvestmentOtherThanTemporaryImpairment	0	USD
CY2018	us-gaap	Equity Method Investment Other Than Temporary Impairment EquityMethodInvestmentOtherThanTemporaryImpairment	804000	USD
CY2020	us-gaap	Increase Decrease In Accrued Interest Receivable Net IncreaseDecreaseInAccruedInterestReceivableNet	3467000	USD
CY2019	us-gaap	Increase Decrease In Accrued Interest Receivable Net IncreaseDecreaseInAccruedInterestReceivableNet	-305000	USD
CY2018	us-gaap	Increase Decrease In Accrued Interest Receivable Net IncreaseDecreaseInAccruedInterestReceivableNet	432000	USD
CY2020	us-gaap	Increase Decrease In Other Operating Assets IncreaseDecreaseInOtherOperatingAssets	15096000	USD
CY2019	us-gaap	Increase Decrease In Other Operating Assets IncreaseDecreaseInOtherOperatingAssets	-6395000	USD
CY2018	us-gaap	Increase Decrease In Other Operating Assets IncreaseDecreaseInOtherOperatingAssets	2512000	USD
CY2020	us-gaap	Increase Decrease In Other Operating Liabilities IncreaseDecreaseInOtherOperatingLiabilities	12415000	USD
CY2019	us-gaap	Increase Decrease In Other Operating Liabilities IncreaseDecreaseInOtherOperatingLiabilities	2411000	USD
CY2018	us-gaap	Increase Decrease In Other Operating Liabilities IncreaseDecreaseInOtherOperatingLiabilities	-5233000	USD
CY2020	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	-36454000	USD
CY2019	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	-821000	USD
CY2018	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	25150000	USD
CY2020	us-gaap	Payments To Acquire Available For Sale Securities Debt PaymentsToAcquireAvailableForSaleSecuritiesDebt	160423000	USD
CY2019	us-gaap	Payments To Acquire Available For Sale Securities Debt PaymentsToAcquireAvailableForSaleSecuritiesDebt	132104000	USD
CY2018	us-gaap	Payments To Acquire Available For Sale Securities Debt PaymentsToAcquireAvailableForSaleSecuritiesDebt	88139000	USD
CY2020	nrim	Paymentsto Acquire Equity Securities Fvni PaymentstoAcquireEquitySecuritiesFVNI	1552000	USD
CY2019	nrim	Paymentsto Acquire Equity Securities Fvni PaymentstoAcquireEquitySecuritiesFVNI	0	USD
CY2018	nrim	Paymentsto Acquire Equity Securities Fvni PaymentstoAcquireEquitySecuritiesFVNI	2992000	USD
CY2020	nrim	Paymentsfor Purchaseof Federal Home Loan Bank Stock PaymentsforPurchaseofFederalHomeLoanBankStock	5931000	USD
CY2019	nrim	Paymentsfor Purchaseof Federal Home Loan Bank Stock PaymentsforPurchaseofFederalHomeLoanBankStock	880000	USD
CY2018	nrim	Paymentsfor Purchaseof Federal Home Loan Bank Stock PaymentsforPurchaseofFederalHomeLoanBankStock	0	USD
CY2020	us-gaap	Payments To Acquire Held To Maturity Securities PaymentsToAcquireHeldToMaturitySecurities	10000000	USD
CY2019	us-gaap	Payments To Acquire Held To Maturity Securities PaymentsToAcquireHeldToMaturitySecurities	0	USD
CY2018	us-gaap	Payments To Acquire Held To Maturity Securities PaymentsToAcquireHeldToMaturitySecurities	0	USD
CY2020	us-gaap	Proceeds From Maturities Prepayments And Calls Of Available For Sale Securities ProceedsFromMaturitiesPrepaymentsAndCallsOfAvailableForSaleSecurities	189323000	USD
CY2019	us-gaap	Proceeds From Maturities Prepayments And Calls Of Available For Sale Securities ProceedsFromMaturitiesPrepaymentsAndCallsOfAvailableForSaleSecurities	130482000	USD
CY2018	us-gaap	Proceeds From Maturities Prepayments And Calls Of Available For Sale Securities ProceedsFromMaturitiesPrepaymentsAndCallsOfAvailableForSaleSecurities	122644000	USD
CY2020	nrim	Proceedsfrom Maturitiesand Callsof Equity Securities Fvni ProceedsfromMaturitiesandCallsofEquitySecuritiesFVNI	601000	USD
CY2019	nrim	Proceedsfrom Maturitiesand Callsof Equity Securities Fvni ProceedsfromMaturitiesandCallsofEquitySecuritiesFVNI	229000	USD
CY2018	nrim	Proceedsfrom Maturitiesand Callsof Equity Securities Fvni ProceedsfromMaturitiesandCallsofEquitySecuritiesFVNI	783000	USD
CY2020	nrim	Proceeds From Redemption Of Federal Home Loan Bank Stock ProceedsFromRedemptionOfFederalHomeLoanBankStock	5518000	USD
CY2019	nrim	Proceeds From Redemption Of Federal Home Loan Bank Stock ProceedsFromRedemptionOfFederalHomeLoanBankStock	843000	USD
CY2018	nrim	Proceeds From Redemption Of Federal Home Loan Bank Stock ProceedsFromRedemptionOfFederalHomeLoanBankStock	14000	USD
CY2020	us-gaap	Payments For Proceeds From Loans Receivable PaymentsForProceedsFromLoansReceivable	-10472000	USD
CY2019	us-gaap	Payments For Proceeds From Loans Receivable PaymentsForProceedsFromLoansReceivable	9871000	USD
CY2018	us-gaap	Payments For Proceeds From Loans Receivable PaymentsForProceedsFromLoansReceivable	-7835000	USD
CY2020	us-gaap	Payments To Acquire Loans Held For Investment PaymentsToAcquireLoansHeldForInvestment	408365000	USD
CY2019	us-gaap	Payments To Acquire Loans Held For Investment PaymentsToAcquireLoansHeldForInvestment	58879000	USD
CY2018	us-gaap	Payments To Acquire Loans Held For Investment PaymentsToAcquireLoansHeldForInvestment	31852000	USD
CY2020	us-gaap	Proceeds From Sale Of Other Real Estate ProceedsFromSaleOfOtherRealEstate	797000	USD
CY2019	us-gaap	Proceeds From Sale Of Other Real Estate ProceedsFromSaleOfOtherRealEstate	1299000	USD
CY2018	us-gaap	Proceeds From Sale Of Other Real Estate ProceedsFromSaleOfOtherRealEstate	1522000	USD
CY2020	nrim	Investment In Other Real Estate Owned InvestmentInOtherRealEstateOwned	0	USD
CY2019	nrim	Investment In Other Real Estate Owned InvestmentInOtherRealEstateOwned	0	USD
CY2018	nrim	Investment In Other Real Estate Owned InvestmentInOtherRealEstateOwned	144000	USD
CY2020	us-gaap	Payments For Software PaymentsForSoftware	416000	USD
CY2019	us-gaap	Payments For Software PaymentsForSoftware	721000	USD
CY2018	us-gaap	Payments For Software PaymentsForSoftware	517000	USD
CY2020	us-gaap	Proceeds From Sale Of Property Plant And Equipment ProceedsFromSaleOfPropertyPlantAndEquipment	0	USD
CY2019	us-gaap	Proceeds From Sale Of Property Plant And Equipment ProceedsFromSaleOfPropertyPlantAndEquipment	0	USD
CY2018	us-gaap	Proceeds From Sale Of Property Plant And Equipment ProceedsFromSaleOfPropertyPlantAndEquipment	3000	USD
CY2020	us-gaap	Payments To Acquire Property Plant And Equipment PaymentsToAcquirePropertyPlantAndEquipment	2849000	USD
CY2019	us-gaap	Payments To Acquire Property Plant And Equipment PaymentsToAcquirePropertyPlantAndEquipment	2318000	USD
CY2018	us-gaap	Payments To Acquire Property Plant And Equipment PaymentsToAcquirePropertyPlantAndEquipment	3511000	USD
CY2020	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	-382825000	USD
CY2019	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	-71920000	USD
CY2018	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	5646000	USD
CY2020	us-gaap	Increase Decrease In Deposits IncreaseDecreaseInDeposits	452630000	USD
CY2019	us-gaap	Increase Decrease In Deposits IncreaseDecreaseInDeposits	144263000	USD
CY2018	us-gaap	Increase Decrease In Deposits IncreaseDecreaseInDeposits	-30195000	USD
CY2020	us-gaap	Increase Decrease In Federal Funds Purchased And Securities Sold Under Agreements To Repurchase Net IncreaseDecreaseInFederalFundsPurchasedAndSecuritiesSoldUnderAgreementsToRepurchaseNet	0	USD
CY2019	us-gaap	Increase Decrease In Federal Funds Purchased And Securities Sold Under Agreements To Repurchase Net IncreaseDecreaseInFederalFundsPurchasedAndSecuritiesSoldUnderAgreementsToRepurchaseNet	-34278000	USD
CY2018	us-gaap	Increase Decrease In Federal Funds Purchased And Securities Sold Under Agreements To Repurchase Net IncreaseDecreaseInFederalFundsPurchasedAndSecuritiesSoldUnderAgreementsToRepurchaseNet	6532000	USD
CY2020	us-gaap	Proceeds From Long Term Lines Of Credit ProceedsFromLongTermLinesOfCredit	110610000	USD
CY2019	us-gaap	Proceeds From Long Term Lines Of Credit ProceedsFromLongTermLinesOfCredit	1817000	USD
CY2018	us-gaap	Proceeds From Long Term Lines Of Credit ProceedsFromLongTermLinesOfCredit	0	USD
CY2020	us-gaap	Repayments Of Long Term Lines Of Credit RepaymentsOfLongTermLinesOfCredit	104684000	USD
CY2019	us-gaap	Repayments Of Long Term Lines Of Credit RepaymentsOfLongTermLinesOfCredit	167000	USD
CY2018	us-gaap	Repayments Of Long Term Lines Of Credit RepaymentsOfLongTermLinesOfCredit	121000	USD
CY2020	us-gaap	Proceeds From Issuance Of Common Stock ProceedsFromIssuanceOfCommonStock	84000	USD
CY2019	us-gaap	Proceeds From Issuance Of Common Stock ProceedsFromIssuanceOfCommonStock	73000	USD
CY2018	us-gaap	Proceeds From Issuance Of Common Stock ProceedsFromIssuanceOfCommonStock	243000	USD
CY2020	us-gaap	Payments For Repurchase Of Common Stock PaymentsForRepurchaseOfCommonStock	9976000	USD
CY2019	us-gaap	Payments For Repurchase Of Common Stock PaymentsForRepurchaseOfCommonStock	12569000	USD
CY2018	us-gaap	Payments For Repurchase Of Common Stock PaymentsForRepurchaseOfCommonStock	494000	USD
CY2020	us-gaap	Payments Of Dividends PaymentsOfDividends	8844000	USD
CY2019	us-gaap	Payments Of Dividends PaymentsOfDividends	8512000	USD
CY2018	us-gaap	Payments Of Dividends PaymentsOfDividends	7064000	USD
CY2020	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	439820000	USD
CY2019	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	90627000	USD
CY2018	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	-31099000	USD
CY2020	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Period Increase Decrease Including Exchange Rate Effect CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect	20541000	USD
CY2019	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Period Increase Decrease Including Exchange Rate Effect CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect	17886000	USD
CY2018	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Period Increase Decrease Including Exchange Rate Effect CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect	-303000	USD
CY2019Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	95424000	USD
CY2018Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	77538000	USD
CY2017Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	77841000	USD
CY2020Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	115965000	USD
CY2019Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	95424000	USD
CY2018Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	77538000	USD
CY2020	us-gaap	Income Taxes Paid Net IncomeTaxesPaidNet	7790000	USD
CY2019	us-gaap	Income Taxes Paid Net IncomeTaxesPaidNet	1658000	USD
CY2018	us-gaap	Income Taxes Paid Net IncomeTaxesPaidNet	1766000	USD
CY2020	us-gaap	Interest Paid Net InterestPaidNet	6009000	USD
CY2019	us-gaap	Interest Paid Net InterestPaidNet	5640000	USD
CY2018	us-gaap	Interest Paid Net InterestPaidNet	2971000	USD
CY2020	nrim	Noncash Commitmentto Investin Low Income Housing Tax Credit Partnerships NoncashCommitmenttoInvestinLowIncomeHousingTaxCreditPartnerships	0	USD
CY2020Q4	nrim	Numberof Trust NumberofTrust	1	trust
CY2019	nrim	Noncash Commitmentto Investin Low Income Housing Tax Credit Partnerships NoncashCommitmenttoInvestinLowIncomeHousingTaxCreditPartnerships	11267000	USD
CY2018	nrim	Noncash Commitmentto Investin Low Income Housing Tax Credit Partnerships NoncashCommitmenttoInvestinLowIncomeHousingTaxCreditPartnerships	0	USD
CY2020	nrim	Loans Transferred From Loans To Other Real Estate Owned LoansTransferredFromLoansToOtherRealEstateOwned	652000	USD
CY2019	nrim	Loans Transferred From Loans To Other Real Estate Owned LoansTransferredFromLoansToOtherRealEstateOwned	0	USD
CY2018	nrim	Loans Transferred From Loans To Other Real Estate Owned LoansTransferredFromLoansToOtherRealEstateOwned	686000	USD
CY2020	us-gaap	Right Of Use Asset Obtained In Exchange For Operating Lease Liability RightOfUseAssetObtainedInExchangeForOperatingLeaseLiability	370000	USD
CY2019	us-gaap	Right Of Use Asset Obtained In Exchange For Operating Lease Liability RightOfUseAssetObtainedInExchangeForOperatingLeaseLiability	1234000	USD
CY2020Q4	us-gaap	Dividends Payable Current And Noncurrent DividendsPayableCurrentAndNoncurrent	98000	USD
CY2019Q4	us-gaap	Dividends Payable Current And Noncurrent DividendsPayableCurrentAndNoncurrent	89000	USD
CY2018Q4	us-gaap	Dividends Payable Current And Noncurrent DividendsPayableCurrentAndNoncurrent	72000	USD
CY2020	us-gaap	Use Of Estimates UseOfEstimates	The Company prepares its consolidated financial statements in conformity with accounting principles generally accepted in the United States and prevailing practices within the banking industry. The preparation of consolidated financial statements in conformity with accounting principles generally accepted in the United States (“GAAP”) requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities, the disclosure of contingent assets and liabilities at the date of the consolidated financial statements, and the reported amounts of income, gains, expenses, and losses during the reporting periods. Actual results could differ from those estimates. Significant estimates include the allowance for loan losses (“Allowance”), valuation of goodwill and other intangibles, valuation of other real estate owned (“OREO”), valuation of mortgage servicing rights, and fair value disclosures.
CY2020	us-gaap	Number Of Operating Segments NumberOfOperatingSegments	2	segment
CY2020	us-gaap	Prior Period Reclassification Adjustment Description PriorPeriodReclassificationAdjustmentDescription	Certain reclassifications have been made to prior year amounts to maintain consistency with the current year with no impact on net income or total shareholders’ equity.
CY2020	nrim	Maturity Period Of Securities At Acquisition MaturityPeriodOfSecuritiesAtAcquisition	P90D
CY2020	nrim	Threshold For Nonperforming Loans Individually Evaluated For Impairment ThresholdForNonperformingLoansIndividuallyEvaluatedForImpairment	50000	USD
CY2020	nrim	Duration Of Loss History Used To Calculate General Reserve DurationOfLossHistoryUsedToCalculateGeneralReserve	P5Y
CY2020	nrim	Purchased Receivables Termof Receivable PurchasedReceivablesTermofReceivable	P1Y
CY2020	us-gaap	Marketing Expense MarketingExpense	2300000	USD
CY2019	us-gaap	Marketing Expense MarketingExpense	2400000	USD
CY2018	us-gaap	Marketing Expense MarketingExpense	2300000	USD
CY2020	us-gaap	Antidilutive Securities Excluded From Computation Of Earnings Per Share Amount AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount	45062	shares
CY2018	us-gaap	Antidilutive Securities Excluded From Computation Of Earnings Per Share Amount AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount	44721	shares
CY2019	us-gaap	Antidilutive Securities Excluded From Computation Of Earnings Per Share Amount AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount	0	shares
CY2020	us-gaap	Net Income Loss NetIncomeLoss	32888000	USD
CY2019	us-gaap	Net Income Loss NetIncomeLoss	20691000	USD
CY2018	us-gaap	Net Income Loss NetIncomeLoss	20004000	USD
CY2020	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	6355000	shares
CY2019	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	6709000	shares
CY2018	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	6878000	shares
CY2020	us-gaap	Incremental Common Shares Attributable To Share Based Payment Arrangements IncrementalCommonSharesAttributableToShareBasedPaymentArrangements	76000	shares
CY2019	us-gaap	Incremental Common Shares Attributable To Share Based Payment Arrangements IncrementalCommonSharesAttributableToShareBasedPaymentArrangements	99000	shares
CY2018	us-gaap	Incremental Common Shares Attributable To Share Based Payment Arrangements IncrementalCommonSharesAttributableToShareBasedPaymentArrangements	104000	shares
CY2020	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	6431000	shares
CY2019	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	6808000	shares
CY2018	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	6982000	shares
CY2020	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	5.18
CY2019	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	3.08
CY2018	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	2.91
CY2020	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	5.11
CY2019	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	3.04
CY2018	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	2.86
CY2020	us-gaap	Concentration Risk Credit Risk ConcentrationRiskCreditRisk	Substantially all of the Company’s business is derived from the Anchorage, Matanuska-Susitna Valley, Fairbanks, Kenai Peninsula, and Southeast areas of Alaska. As such, the Company’s growth and operations depend upon the economic conditions of Alaska and these specific markets. These areas rely primarily upon the natural resources industries, particularly oil production, as well as tourism, government and U.S. military spending for their economic success. A significant majority of the unrestricted revenues of the Alaska state government are currently funded through various taxes and royalties on the oil industry. The Company’s business is and will remain sensitive to economic factors that relate to these industries and local and regional business conditions. As a result, local or regional economic downturns, or downturns that disproportionately affect one or more of the key industries in regions served by the Company, may have a more pronounced effect upon its business than they might on an institution that is less geographically concentrated. The extent of the future impact of these events on economic and business conditions cannot be predicted; however, prolonged or acute fluctuations could have a material and adverse impact upon the Company’s results of operation and financial condition.
CY2020Q4	nrim	Loans Receivable Commercial And Construction LoansReceivableCommercialAndConstruction	898800000	USD
CY2019Q4	nrim	Loans Receivable Commercial And Construction LoansReceivableCommercialAndConstruction	513300000	USD
CY2020Q4	nrim	Number Of Large Borrowing Relationships NumberOfLargeBorrowingRelationships	35	large_borrower
CY2020Q4	nrim	Unfunded Commitments To Large Borrowers UnfundedCommitmentsToLargeBorrowers	137900000	USD
CY2020Q4	us-gaap	Compensating Balance Amount CompensatingBalanceAmount	250000	USD
CY2020Q4	nrim	Compensating Balance Amount Initial Margin On Interest Rate Swap CompensatingBalanceAmountInitialMarginOnInterestRateSwap	100000	USD
CY2020Q4	nrim	Compensating Balance Amount Fair Value Exposure On Interest Rate Swap CompensatingBalanceAmountFairValueExposureOnInterestRateSwap	2800000	USD
CY2020	nrim	Interest Bearing Deposits In Other Banks Maximum Maturity Period InterestBearingDepositsInOtherBanksMaximumMaturityPeriod	P1Y
CY2020Q4	nrim	Interest Bearing Deposits At Federal Reserve Bank InterestBearingDepositsAtFederalReserveBank	54488000	USD
CY2019Q4	nrim	Interest Bearing Deposits At Federal Reserve Bank InterestBearingDepositsAtFederalReserveBank	48200000	USD
CY2020Q4	nrim	Interest Bearing Deposits At Federal Home Loan Bank InterestBearingDepositsAtFederalHomeLoanBank	133000	USD
CY2019Q4	nrim	Interest Bearing Deposits At Federal Home Loan Bank InterestBearingDepositsAtFederalHomeLoanBank	36000	USD
CY2020Q4	nrim	Other Interest Bearing Deposits At Other Institutions OtherInterestBearingDepositsAtOtherInstitutions	38040000	USD
CY2019Q4	nrim	Other Interest Bearing Deposits At Other Institutions OtherInterestBearingDepositsAtOtherInstitutions	26670000	USD
CY2020Q4	us-gaap	Interest Bearing Deposits In Banks InterestBearingDepositsInBanks	92661000	USD
CY2019Q4	us-gaap	Interest Bearing Deposits In Banks InterestBearingDepositsInBanks	74906000	USD
CY2020Q4	us-gaap	Available For Sale Debt Securities Amortized Cost Basis AvailableForSaleDebtSecuritiesAmortizedCostBasis	245871000	USD
CY2020Q4	us-gaap	Available For Sale Debt Securities Accumulated Gross Unrealized Gain Before Tax AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedGainBeforeTax	1956000	USD
CY2020Q4	us-gaap	Available For Sale Debt Securities Accumulated Gross Unrealized Loss Before Tax AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedLossBeforeTax	194000	USD
CY2020Q4	us-gaap	Available For Sale Securities Debt Securities AvailableForSaleSecuritiesDebtSecurities	247633000	USD
CY2020Q4	us-gaap	Held To Maturity Securities HeldToMaturitySecurities	10000000	USD
CY2020Q4	us-gaap	Held To Maturity Securities Accumulated Unrecognized Holding Gain HeldToMaturitySecuritiesAccumulatedUnrecognizedHoldingGain	0	USD
CY2020Q4	us-gaap	Held To Maturity Securities Accumulated Unrecognized Holding Loss HeldToMaturitySecuritiesAccumulatedUnrecognizedHoldingLoss	0	USD
CY2020Q4	us-gaap	Held To Maturity Securities Fair Value HeldToMaturitySecuritiesFairValue	10000000	USD
CY2019Q4	us-gaap	Available For Sale Debt Securities Amortized Cost Basis AvailableForSaleDebtSecuritiesAmortizedCostBasis	274788000	USD
CY2019Q4	us-gaap	Available For Sale Debt Securities Accumulated Gross Unrealized Gain Before Tax AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedGainBeforeTax	1444000	USD
CY2019Q4	us-gaap	Available For Sale Debt Securities Accumulated Gross Unrealized Loss Before Tax AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedLossBeforeTax	94000	USD
CY2019Q4	us-gaap	Debt Securities Available For Sale Unrealized Loss Position Accumulated Loss DebtSecuritiesAvailableForSaleUnrealizedLossPositionAccumulatedLoss	94000	USD
CY2019Q4	us-gaap	Available For Sale Securities Debt Securities AvailableForSaleSecuritiesDebtSecurities	276138000	USD
CY2020Q4	us-gaap	Debt Securities Available For Sale Continuous Unrealized Loss Position Less Than12 Months DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPositionLessThan12Months	58138000	USD
CY2020Q4	us-gaap	Debt Securities Available For Sale Continuous Unrealized Loss Position Less Than12 Months Accumulated Loss DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPositionLessThan12MonthsAccumulatedLoss	170000	USD
CY2020Q4	us-gaap	Debt Securities Available For Sale Continuous Unrealized Loss Position12 Months Or Longer DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPosition12MonthsOrLonger	2967000	USD
CY2020Q4	us-gaap	Debt Securities Available For Sale Continuous Unrealized Loss Position12 Months Or Longer Accumulated Loss DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPosition12MonthsOrLongerAccumulatedLoss	24000	USD
CY2020Q4	us-gaap	Debt Securities Available For Sale Unrealized Loss Position DebtSecuritiesAvailableForSaleUnrealizedLossPosition	61105000	USD
CY2020Q4	us-gaap	Debt Securities Available For Sale Unrealized Loss Position Accumulated Loss DebtSecuritiesAvailableForSaleUnrealizedLossPositionAccumulatedLoss	194000	USD
CY2019Q4	us-gaap	Debt Securities Available For Sale Continuous Unrealized Loss Position Less Than12 Months DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPositionLessThan12Months	54769000	USD
CY2019Q4	us-gaap	Debt Securities Available For Sale Continuous Unrealized Loss Position Less Than12 Months Accumulated Loss DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPositionLessThan12MonthsAccumulatedLoss	50000	USD
CY2019Q4	us-gaap	Debt Securities Available For Sale Continuous Unrealized Loss Position12 Months Or Longer DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPosition12MonthsOrLonger	10947000	USD
CY2019Q4	us-gaap	Debt Securities Available For Sale Continuous Unrealized Loss Position12 Months Or Longer Accumulated Loss DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPosition12MonthsOrLongerAccumulatedLoss	44000	USD
CY2019Q4	us-gaap	Debt Securities Available For Sale Unrealized Loss Position DebtSecuritiesAvailableForSaleUnrealizedLossPosition	65716000	USD
CY2020Q4	us-gaap	Debt Securities Available For Sale Continuous Unrealized Loss Position Less Than12 Months Number Of Positions DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPositionLessThan12MonthsNumberOfPositions	12	security
CY2019Q4	us-gaap	Debt Securities Available For Sale Continuous Unrealized Loss Position Less Than12 Months Number Of Positions DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPositionLessThan12MonthsNumberOfPositions	8	security
CY2020Q4	us-gaap	Debt Securities Available For Sale Continuous Unrealized Loss Position12 Months Or Longer Number Of Positions DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPosition12MonthsOrLongerNumberOfPositions	1	security
CY2019Q4	us-gaap	Debt Securities Available For Sale Continuous Unrealized Loss Position12 Months Or Longer Number Of Positions DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPosition12MonthsOrLongerNumberOfPositions	3	security
CY2020Q4	us-gaap	Debt Securities Available For Sale Restricted DebtSecuritiesAvailableForSaleRestricted	77900000	USD
CY2019	us-gaap	Proceeds From Sale Of Available For Sale Securities Debt ProceedsFromSaleOfAvailableForSaleSecuritiesDebt	4219000	USD
CY2019Q4	us-gaap	Debt Securities Available For Sale Restricted DebtSecuritiesAvailableForSaleRestricted	30600000	USD
CY2020	us-gaap	Proceeds From Sale Of Available For Sale Securities Debt ProceedsFromSaleOfAvailableForSaleSecuritiesDebt	0	USD
CY2020	us-gaap	Debt Securities Available For Sale Realized Gain DebtSecuritiesAvailableForSaleRealizedGain	0	USD
CY2020	us-gaap	Debt Securities Available For Sale Realized Loss DebtSecuritiesAvailableForSaleRealizedLoss	0	USD
CY2019	us-gaap	Debt Securities Available For Sale Realized Gain DebtSecuritiesAvailableForSaleRealizedGain	23000	USD
CY2019	us-gaap	Debt Securities Available For Sale Realized Loss DebtSecuritiesAvailableForSaleRealizedLoss	0	USD
CY2018	us-gaap	Proceeds From Sale Of Available For Sale Securities Debt ProceedsFromSaleOfAvailableForSaleSecuritiesDebt	0	USD
CY2018	us-gaap	Debt Securities Available For Sale Realized Gain DebtSecuritiesAvailableForSaleRealizedGain	0	USD
CY2018	us-gaap	Debt Securities Available For Sale Realized Loss DebtSecuritiesAvailableForSaleRealizedLoss	0	USD
CY2020	us-gaap	Interest Income Securities Taxable InterestIncomeSecuritiesTaxable	4750000	USD
CY2019	us-gaap	Interest Income Securities Taxable InterestIncomeSecuritiesTaxable	6452000	USD
CY2018	us-gaap	Interest Income Securities Taxable InterestIncomeSecuritiesTaxable	5214000	USD
CY2020	us-gaap	Interest Income Securities Tax Exempt InterestIncomeSecuritiesTaxExempt	82000	USD
CY2019	us-gaap	Interest Income Securities Tax Exempt InterestIncomeSecuritiesTaxExempt	120000	USD
CY2018	us-gaap	Interest Income Securities Tax Exempt InterestIncomeSecuritiesTaxExempt	267000	USD
CY2020	us-gaap	Interest And Dividend Income Securities InterestAndDividendIncomeSecurities	4832000	USD
CY2019	us-gaap	Interest And Dividend Income Securities InterestAndDividendIncomeSecurities	6572000	USD
CY2018	us-gaap	Interest And Dividend Income Securities InterestAndDividendIncomeSecurities	5481000	USD
CY2020Q4	us-gaap	Loans And Leases Receivable Gross Carrying Amount LoansAndLeasesReceivableGrossCarryingAmount	1455785000	USD
CY2020Q4	us-gaap	Loans And Leases Receivable Deferred Income LoansAndLeasesReceivableDeferredIncome	11735000	USD
CY2020Q4	us-gaap	Loans And Leases Receivable Net Of Deferred Income LoansAndLeasesReceivableNetOfDeferredIncome	1444050000	USD
CY2019Q4	us-gaap	Loans And Leases Receivable Gross Carrying Amount LoansAndLeasesReceivableGrossCarryingAmount	1048456000	USD
CY2019Q4	us-gaap	Loans And Leases Receivable Deferred Income LoansAndLeasesReceivableDeferredIncome	5085000	USD
CY2019Q4	us-gaap	Loans And Leases Receivable Net Of Deferred Income LoansAndLeasesReceivableNetOfDeferredIncome	1043371000	USD
CY2020Q4	nrim	Financing Receivables Percentage Of Total Loans Excluding Ppp Loans Secured By Real Estate FinancingReceivablesPercentageOfTotalLoansExcludingPPPLoansSecuredByRealEstate	0.73
CY2020Q4	nrim	Financing Receivables Percentage Of Total Loans Excluding Ppp Loans Unsecured FinancingReceivablesPercentageOfTotalLoansExcludingPPPLoansUnsecured	0.02
CY2020Q4	nrim	Financing Receivables Percentage Of Total Loans Excluding Ppp Loans Secured For General Commercial Uses FinancingReceivablesPercentageOfTotalLoansExcludingPPPLoansSecuredForGeneralCommercialUses	0.25
CY2020Q4	nrim	Financing Receivable Recorded Investment Nonaccrual Status Excluding Government Guaranteed Payments FinancingReceivableRecordedInvestmentNonaccrualStatusExcludingGovernmentGuaranteedPayments	9600000	USD
CY2019Q4	nrim	Financing Receivable Recorded Investment Nonaccrual Status Excluding Government Guaranteed Payments FinancingReceivableRecordedInvestmentNonaccrualStatusExcludingGovernmentGuaranteedPayments	14000000.0	USD
CY2020	nrim	Financing Receivable Recorded Investment Interest Income Earned On Nonaccrual Loans FinancingReceivableRecordedInvestmentInterestIncomeEarnedOnNonaccrualLoans	856000	USD
CY2019	nrim	Financing Receivable Recorded Investment Interest Income Earned On Nonaccrual Loans FinancingReceivableRecordedInvestmentInterestIncomeEarnedOnNonaccrualLoans	1300000	USD
CY2018	nrim	Financing Receivable Recorded Investment Interest Income Earned On Nonaccrual Loans FinancingReceivableRecordedInvestmentInterestIncomeEarnedOnNonaccrualLoans	1300000	USD
CY2020	nrim	Interest Income Earnedon Nonaccrual Loans With No Balance InterestIncomeEarnedonNonaccrualLoansWithNoBalance	924000	USD
CY2019	nrim	Interest Income Earnedon Nonaccrual Loans With No Balance InterestIncomeEarnedonNonaccrualLoansWithNoBalance	301000	USD
CY2018	nrim	Interest Income Earnedon Nonaccrual Loans With No Balance InterestIncomeEarnedonNonaccrualLoansWithNoBalance	159000	USD
CY2020Q4	us-gaap	Financing Receivable Recorded Investment Nonaccrual Status FinancingReceivableRecordedInvestmentNonaccrualStatus	11120000	USD
CY2020Q4	nrim	Financing Receivable Recorded Investment Nonaccrual Status Government Guaranteed Payment FinancingReceivableRecordedInvestmentNonaccrualStatusGovernmentGuaranteedPayment	1521000	USD
CY2020Q4	nrim	Financing Receivable Recorded Investment Nonaccrual Status Excluding Government Guaranteed Payments FinancingReceivableRecordedInvestmentNonaccrualStatusExcludingGovernmentGuaranteedPayments	9599000	USD
CY2019Q4	us-gaap	Financing Receivable Recorded Investment Nonaccrual Status FinancingReceivableRecordedInvestmentNonaccrualStatus	15356000	USD
CY2019Q4	nrim	Financing Receivable Recorded Investment Nonaccrual Status Government Guaranteed Payment FinancingReceivableRecordedInvestmentNonaccrualStatusGovernmentGuaranteedPayment	1405000	USD
CY2019Q4	nrim	Financing Receivable Recorded Investment Nonaccrual Status Excluding Government Guaranteed Payments FinancingReceivableRecordedInvestmentNonaccrualStatusExcludingGovernmentGuaranteedPayments	13951000	USD
CY2020	nrim	Financing Receivable90 Days Or More Past Due Still Accruing Number Of Contracts FinancingReceivable90DaysOrMorePastDueStillAccruingNumberOfContracts	1	loan
CY2019	nrim	Financing Receivable90 Days Or More Past Due Still Accruing Number Of Contracts FinancingReceivable90DaysOrMorePastDueStillAccruingNumberOfContracts	0	loan
CY2020Q4	us-gaap	Financing Receivable Recorded Investment Past Due FinancingReceivableRecordedInvestmentPastDue	1337000	USD
CY2020Q4	us-gaap	Financing Receivable Recorded Investment Nonaccrual Status FinancingReceivableRecordedInvestmentNonaccrualStatus	11120000	USD
CY2020Q4	us-gaap	Financing Receivable Recorded Investment Current FinancingReceivableRecordedInvestmentCurrent	1443328000	USD
CY2020Q4	us-gaap	Loans And Leases Receivable Gross Carrying Amount LoansAndLeasesReceivableGrossCarryingAmount	1455785000	USD
CY2020Q4	us-gaap	Loans And Leases Receivable Deferred Income LoansAndLeasesReceivableDeferredIncome	11735000	USD
CY2020Q4	us-gaap	Loans And Leases Receivable Net Of Deferred Income LoansAndLeasesReceivableNetOfDeferredIncome	1444050000	USD
CY2019Q4	us-gaap	Financing Receivable Recorded Investment Past Due FinancingReceivableRecordedInvestmentPastDue	1534000	USD
CY2019Q4	us-gaap	Financing Receivable Recorded Investment Nonaccrual Status FinancingReceivableRecordedInvestmentNonaccrualStatus	15356000	USD
CY2019Q4	us-gaap	Financing Receivable Recorded Investment Current FinancingReceivableRecordedInvestmentCurrent	1031566000	USD
CY2019Q4	us-gaap	Loans And Leases Receivable Gross Carrying Amount LoansAndLeasesReceivableGrossCarryingAmount	1048456000	USD
CY2019Q4	us-gaap	Loans And Leases Receivable Deferred Income LoansAndLeasesReceivableDeferredIncome	5085000	USD
CY2019Q4	us-gaap	Loans And Leases Receivable Net Of Deferred Income LoansAndLeasesReceivableNetOfDeferredIncome	1043371000	USD
CY2020Q4	us-gaap	Impaired Financing Receivable Recorded Investment ImpairedFinancingReceivableRecordedInvestment	18000000.0	USD
CY2019Q4	us-gaap	Impaired Financing Receivable Recorded Investment ImpairedFinancingReceivableRecordedInvestment	24700000	USD
CY2020Q4	us-gaap	Impaired Financing Receivable With No Related Allowance Recorded Investment ImpairedFinancingReceivableWithNoRelatedAllowanceRecordedInvestment	17720000	USD
CY2020Q4	us-gaap	Impaired Financing Receivable With No Related Allowance Unpaid Principal Balance ImpairedFinancingReceivableWithNoRelatedAllowanceUnpaidPrincipalBalance	18619000	USD
CY2020Q4	us-gaap	Impaired Financing Receivable With Related Allowance Recorded Investment ImpairedFinancingReceivableWithRelatedAllowanceRecordedInvestment	308000	USD
CY2020Q4	us-gaap	Impaired Financing Receivable With Related Allowance Unpaid Principal Balance ImpairedFinancingReceivableWithRelatedAllowanceUnpaidPrincipalBalance	308000	USD
CY2020Q4	us-gaap	Impaired Financing Receivable Related Allowance ImpairedFinancingReceivableRelatedAllowance	13000	USD
CY2020Q4	us-gaap	Impaired Financing Receivable Recorded Investment ImpairedFinancingReceivableRecordedInvestment	18028000	USD
CY2020Q4	us-gaap	Impaired Financing Receivable Unpaid Principal Balance ImpairedFinancingReceivableUnpaidPrincipalBalance	18927000	USD
CY2020Q4	us-gaap	Impaired Financing Receivable Related Allowance ImpairedFinancingReceivableRelatedAllowance	13000	USD
CY2019Q4	us-gaap	Impaired Financing Receivable With No Related Allowance Recorded Investment ImpairedFinancingReceivableWithNoRelatedAllowanceRecordedInvestment	24112000	USD
CY2019Q4	us-gaap	Impaired Financing Receivable With No Related Allowance Unpaid Principal Balance ImpairedFinancingReceivableWithNoRelatedAllowanceUnpaidPrincipalBalance	24185000	USD
CY2019Q4	us-gaap	Impaired Financing Receivable With Related Allowance Recorded Investment ImpairedFinancingReceivableWithRelatedAllowanceRecordedInvestment	561000	USD
CY2019Q4	us-gaap	Impaired Financing Receivable With Related Allowance Unpaid Principal Balance ImpairedFinancingReceivableWithRelatedAllowanceUnpaidPrincipalBalance	561000	USD
CY2019Q4	us-gaap	Impaired Financing Receivable Related Allowance ImpairedFinancingReceivableRelatedAllowance	17000	USD
CY2019Q4	us-gaap	Impaired Financing Receivable Recorded Investment ImpairedFinancingReceivableRecordedInvestment	24673000	USD
CY2019Q4	us-gaap	Impaired Financing Receivable Unpaid Principal Balance ImpairedFinancingReceivableUnpaidPrincipalBalance	24746000	USD
CY2019Q4	us-gaap	Impaired Financing Receivable Related Allowance ImpairedFinancingReceivableRelatedAllowance	17000	USD
CY2020	us-gaap	Impaired Financing Receivable With No Related Allowance Average Recorded Investment ImpairedFinancingReceivableWithNoRelatedAllowanceAverageRecordedInvestment	19562000	USD
CY2020	us-gaap	Impaired Financing Receivable With No Related Allowance Interest Income Accrual Method ImpairedFinancingReceivableWithNoRelatedAllowanceInterestIncomeAccrualMethod	325000	USD
CY2019	us-gaap	Impaired Financing Receivable With No Related Allowance Average Recorded Investment ImpairedFinancingReceivableWithNoRelatedAllowanceAverageRecordedInvestment	27477000	USD
CY2019	us-gaap	Impaired Financing Receivable With No Related Allowance Interest Income Accrual Method ImpairedFinancingReceivableWithNoRelatedAllowanceInterestIncomeAccrualMethod	623000	USD
CY2020	us-gaap	Impaired Financing Receivable With Related Allowance Average Recorded Investment ImpairedFinancingReceivableWithRelatedAllowanceAverageRecordedInvestment	1420000	USD
CY2020	us-gaap	Impaired Financing Receivable With Related Allowance Interest Income Accrual Method ImpairedFinancingReceivableWithRelatedAllowanceInterestIncomeAccrualMethod	8000	USD
CY2019	us-gaap	Impaired Financing Receivable With Related Allowance Average Recorded Investment ImpairedFinancingReceivableWithRelatedAllowanceAverageRecordedInvestment	918000	USD
CY2019	us-gaap	Impaired Financing Receivable With Related Allowance Interest Income Accrual Method ImpairedFinancingReceivableWithRelatedAllowanceInterestIncomeAccrualMethod	0	USD
CY2020	us-gaap	Impaired Financing Receivable Average Recorded Investment ImpairedFinancingReceivableAverageRecordedInvestment	20982000	USD
CY2020	us-gaap	Impaired Financing Receivable Interest Income Accrual Method ImpairedFinancingReceivableInterestIncomeAccrualMethod	333000	USD
CY2019	us-gaap	Impaired Financing Receivable Average Recorded Investment ImpairedFinancingReceivableAverageRecordedInvestment	28395000	USD
CY2019	us-gaap	Impaired Financing Receivable Interest Income Accrual Method ImpairedFinancingReceivableInterestIncomeAccrualMethod	623000	USD
CY2018	us-gaap	Impaired Financing Receivable Average Recorded Investment ImpairedFinancingReceivableAverageRecordedInvestment	34700000	USD
CY2018	us-gaap	Impaired Financing Receivable Interest Income Accrual Method ImpairedFinancingReceivableInterestIncomeAccrualMethod	847000	USD
CY2020Q4	us-gaap	Financing Receivable Modifications Recorded Investment FinancingReceivableModificationsRecordedInvestment	7900000	USD
CY2020	nrim	Financing Receivable Modifications Non Troubled Debt Interest FinancingReceivableModificationsNonTroubledDebtInterest	43379000	USD
CY2019Q4	us-gaap	Financing Receivable Modifications Recorded Investment FinancingReceivableModificationsRecordedInvestment	10100000	USD
CY2020	nrim	Financing Receivable Modifications Non Troubled Debt Full Payment Deferral FinancingReceivableModificationsNonTroubledDebtFullPaymentDeferral	22165000	USD
CY2020	nrim	Financing Receivables Modifications Non Troubled Debt Amount FinancingReceivablesModificationsNonTroubledDebtAmount	65544000	USD
CY2020	nrim	Financing Receivables Modifications Non Troubled Debt Interest Number Of Contracts FinancingReceivablesModificationsNonTroubledDebtInterestNumberOfContracts	23000	contract
CY2020	nrim	Financing Receivables Modifications Non Troubled Debt Full Payment Deferral FinancingReceivablesModificationsNonTroubledDebtFullPaymentDeferral	11000	contract
CY2020	nrim	Financing Receivables Modifications Non Troubled Debt Number Of Contracts FinancingReceivablesModificationsNonTroubledDebtNumberOfContracts	34000	contract
CY2020	nrim	Financing Receivable Troubled Debt Restructuring Newly Restructured FinancingReceivableTroubledDebtRestructuringNewlyRestructured	1751000	USD
CY2020Q4	nrim	Financing Receivable Troubled Debt Restructuring Existing Restructurings FinancingReceivableTroubledDebtRestructuringExistingRestructurings	6109000	USD
CY2020Q4	us-gaap	Financing Receivable Modifications Recorded Investment FinancingReceivableModificationsRecordedInvestment	7860000	USD
CY2020	us-gaap	Financing Receivable Modifications Post Modification Recorded Investment2 FinancingReceivableModificationsPostModificationRecordedInvestment2	1751000	USD
CY2019	nrim	Financing Receivable Modifications Pre Modification Recorded Investment Number Of Contracts FinancingReceivableModificationsPreModificationRecordedInvestmentNumberOfContracts	7	contract
CY2019	us-gaap	Financing Receivables Impaired Troubled Debt Restructuring Write Down FinancingReceivablesImpairedTroubledDebtRestructuringWriteDown	64000	USD
CY2020	nrim	Financing Receivable Modificationswith Specific Allowance Numberof Contracts FinancingReceivableModificationswithSpecificAllowanceNumberofContracts	1	contract
CY2019	nrim	Financing Receivable Modificationswith Specific Allowance Numberof Contracts FinancingReceivableModificationswithSpecificAllowanceNumberofContracts	0	contract
CY2019	us-gaap	Financing Receivable Modifications Subsequent Default Number Of Contracts1 FinancingReceivableModificationsSubsequentDefaultNumberOfContracts1	0	contract
CY2020	nrim	Financing Receivable Modifications Pre Modification Recorded Investment Number Of Contracts FinancingReceivableModificationsPreModificationRecordedInvestmentNumberOfContracts	2	contract
CY2020	us-gaap	Financing Receivable Modifications Pre Modification Recorded Investment2 FinancingReceivableModificationsPreModificationRecordedInvestment2	3413000	USD
CY2020	nrim	Financing Receivable Modifications Post Modification Recorded Investment Number Of Contracts FinancingReceivableModificationsPostModificationRecordedInvestmentNumberOfContracts	2	contract
CY2019	us-gaap	Financing Receivable Modifications Pre Modification Recorded Investment2 FinancingReceivableModificationsPreModificationRecordedInvestment2	3286000	USD
CY2019	nrim	Financing Receivable Modifications Post Modification Recorded Investment Number Of Contracts FinancingReceivableModificationsPostModificationRecordedInvestmentNumberOfContracts	7	contract
CY2019	us-gaap	Financing Receivable Modifications Post Modification Recorded Investment2 FinancingReceivableModificationsPostModificationRecordedInvestment2	3151000	USD
CY2020Q4	nrim	Financing Receivable Modifications Numberof Commitmentsto Extend Financing FinancingReceivableModificationsNumberofCommitmentstoExtendFinancing	0	commitment
CY2020	us-gaap	Financing Receivables Impaired Troubled Debt Restructuring Write Down FinancingReceivablesImpairedTroubledDebtRestructuringWriteDown	0	USD
CY2020	us-gaap	Financing Receivable Modifications Subsequent Default Number Of Contracts1 FinancingReceivableModificationsSubsequentDefaultNumberOfContracts1	0	contract
CY2018	us-gaap	Financing Receivable Modifications Subsequent Default Number Of Contracts1 FinancingReceivableModificationsSubsequentDefaultNumberOfContracts1	6	contract
CY2018	us-gaap	Financing Receivable Modifications Subsequent Default Recorded Investment1 FinancingReceivableModificationsSubsequentDefaultRecordedInvestment1	2860000	USD
CY2019Q4	nrim	Analysis Of Loan Transactions AnalysisOfLoanTransactions	309000	USD
CY2018Q4	nrim	Analysis Of Loan Transactions AnalysisOfLoanTransactions	0	USD
CY2017Q4	nrim	Analysis Of Loan Transactions AnalysisOfLoanTransactions	0	USD
CY2020	nrim	Analysis Of Loan Transactions Loans Made AnalysisOfLoanTransactionsLoansMade	0	USD
CY2019	nrim	Analysis Of Loan Transactions Loans Made AnalysisOfLoanTransactionsLoansMade	309000	USD
CY2018	nrim	Analysis Of Loan Transactions Loans Made AnalysisOfLoanTransactionsLoansMade	0	USD
CY2020	nrim	Analysis Of Loan Transactions Repayment Of Loans AnalysisOfLoanTransactionsRepaymentOfLoans	92000	USD
CY2019	nrim	Analysis Of Loan Transactions Repayment Of Loans AnalysisOfLoanTransactionsRepaymentOfLoans	0	USD
CY2018	nrim	Analysis Of Loan Transactions Repayment Of Loans AnalysisOfLoanTransactionsRepaymentOfLoans	0	USD
CY2020Q4	nrim	Analysis Of Loan Transactions AnalysisOfLoanTransactions	217000	USD
CY2019Q4	nrim	Analysis Of Loan Transactions AnalysisOfLoanTransactions	309000	USD
CY2018Q4	nrim	Analysis Of Loan Transactions AnalysisOfLoanTransactions	0	USD
CY2020Q4	nrim	Financing Receivables Unfunded Loan Commitments FinancingReceivablesUnfundedLoanCommitments	15000	USD
CY2019Q4	nrim	Financing Receivables Unfunded Loan Commitments FinancingReceivablesUnfundedLoanCommitments	15000	USD
CY2020Q4	us-gaap	Loans Pledged As Collateral LoansPledgedAsCollateral	0	USD
CY2019Q4	us-gaap	Loans Pledged As Collateral LoansPledgedAsCollateral	0	USD
CY2019Q4	us-gaap	Financing Receivable Allowance For Credit Losses FinancingReceivableAllowanceForCreditLosses	19088000	USD
CY2020	us-gaap	Financing Receivable Allowance For Credit Losses Write Offs FinancingReceivableAllowanceForCreditLossesWriteOffs	1121000	USD
CY2020	us-gaap	Financing Receivable Allowance For Credit Losses Recovery FinancingReceivableAllowanceForCreditLossesRecovery	737000	USD
CY2020	us-gaap	Provision For Loan Losses Expensed ProvisionForLoanLossesExpensed	2432000	USD
CY2020Q4	us-gaap	Financing Receivable Allowance For Credit Losses FinancingReceivableAllowanceForCreditLosses	21136000	USD
CY2020Q4	us-gaap	Financing Receivable Allowance For Credit Losses Individually Evaluated For Impairment1 FinancingReceivableAllowanceForCreditLossesIndividuallyEvaluatedForImpairment1	13000	USD
CY2020Q4	us-gaap	Financing Receivable Allowance For Credit Losses Collectively Evaluated For Impairment FinancingReceivableAllowanceForCreditLossesCollectivelyEvaluatedForImpairment	21123000	USD
CY2018Q4	us-gaap	Financing Receivable Allowance For Credit Losses FinancingReceivableAllowanceForCreditLosses	19519000	USD
CY2018	us-gaap	Financing Receivable Allowance For Credit Losses Write Offs FinancingReceivableAllowanceForCreditLossesWriteOffs	1926000	USD
CY2019	us-gaap	Financing Receivable Allowance For Credit Losses Write Offs FinancingReceivableAllowanceForCreditLossesWriteOffs	217000	USD
CY2019	us-gaap	Financing Receivable Allowance For Credit Losses Recovery FinancingReceivableAllowanceForCreditLossesRecovery	961000	USD
CY2019	us-gaap	Provision For Loan Losses Expensed ProvisionForLoanLossesExpensed	-1175000	USD
CY2019Q4	us-gaap	Financing Receivable Allowance For Credit Losses FinancingReceivableAllowanceForCreditLosses	19088000	USD
CY2019Q4	us-gaap	Financing Receivable Allowance For Credit Losses Individually Evaluated For Impairment1 FinancingReceivableAllowanceForCreditLossesIndividuallyEvaluatedForImpairment1	17000	USD
CY2019Q4	us-gaap	Financing Receivable Allowance For Credit Losses Collectively Evaluated For Impairment FinancingReceivableAllowanceForCreditLossesCollectivelyEvaluatedForImpairment	19071000	USD
CY2017Q4	us-gaap	Financing Receivable Allowance For Credit Losses FinancingReceivableAllowanceForCreditLosses	21461000	USD
CY2018	us-gaap	Financing Receivable Allowance For Credit Losses Recovery FinancingReceivableAllowanceForCreditLossesRecovery	484000	USD
CY2018	us-gaap	Provision For Loan Losses Expensed ProvisionForLoanLossesExpensed	-500000	USD
CY2018Q4	us-gaap	Financing Receivable Allowance For Credit Losses FinancingReceivableAllowanceForCreditLosses	19519000	USD
CY2018Q4	us-gaap	Financing Receivable Allowance For Credit Losses Individually Evaluated For Impairment1 FinancingReceivableAllowanceForCreditLossesIndividuallyEvaluatedForImpairment1	14000	USD
CY2018Q4	us-gaap	Financing Receivable Allowance For Credit Losses Collectively Evaluated For Impairment FinancingReceivableAllowanceForCreditLossesCollectivelyEvaluatedForImpairment	19505000	USD
CY2020Q4	us-gaap	Loans And Leases Receivable Net Of Deferred Income LoansAndLeasesReceivableNetOfDeferredIncome	1444050000	USD
CY2020Q4	us-gaap	Financing Receivable Individually Evaluated For Impairment FinancingReceivableIndividuallyEvaluatedForImpairment	18028000	USD
CY2019	us-gaap	Related Party Transaction Amounts Of Transaction RelatedPartyTransactionAmountsOfTransaction	0	USD
CY2018	us-gaap	Related Party Transaction Amounts Of Transaction RelatedPartyTransactionAmountsOfTransaction	49000	USD
CY2019	nrim	Other Real Estate Owned Expense Net Including Impairment OtherRealEstateOwnedExpenseNetIncludingImpairment	-193000	USD
CY2020Q4	us-gaap	Financing Receivable Collectively Evaluated For Impairment FinancingReceivableCollectivelyEvaluatedForImpairment	1426022000	USD
CY2019Q4	us-gaap	Loans And Leases Receivable Net Of Deferred Income LoansAndLeasesReceivableNetOfDeferredIncome	1043371000	USD
CY2019Q4	us-gaap	Financing Receivable Individually Evaluated For Impairment FinancingReceivableIndividuallyEvaluatedForImpairment	24673000	USD
CY2019Q4	us-gaap	Financing Receivable Collectively Evaluated For Impairment FinancingReceivableCollectivelyEvaluatedForImpairment	1018698000	USD
CY2020Q4	us-gaap	Financing Receivable Allowance For Credit Losses FinancingReceivableAllowanceForCreditLosses	21136000	USD
CY2019Q4	us-gaap	Financing Receivable Allowance For Credit Losses FinancingReceivableAllowanceForCreditLosses	19088000	USD
CY2020	nrim	Purchased Receivables Termof Receivable PurchasedReceivablesTermofReceivable	P1Y
CY2020Q4	nrim	Number Of Segments And Classes Of Purchased Receivables NumberOfSegmentsAndClassesOfPurchasedReceivables	1	segment
CY2020Q4	nrim	Purchased Receivables PurchasedReceivables	13995000	USD
CY2019Q4	nrim	Purchased Receivables PurchasedReceivables	24467000	USD
CY2020Q4	nrim	Reserve For Purchased Receivable Gains Losses ReserveForPurchasedReceivableGainsLosses	73000	USD
CY2019Q4	nrim	Reserve For Purchased Receivable Gains Losses ReserveForPurchasedReceivableGainsLosses	94000	USD
CY2018	us-gaap	Depreciation Depreciation	2300000	USD
CY2020	us-gaap	Related Party Transaction Amounts Of Transaction RelatedPartyTransactionAmountsOfTransaction	0	USD
CY2020Q4	nrim	Purchased Receivables Fair Value Disclosure PurchasedReceivablesFairValueDisclosure	13922000	USD
CY2019Q4	nrim	Purchased Receivables Fair Value Disclosure PurchasedReceivablesFairValueDisclosure	24373000	USD
CY2019Q4	nrim	Reserve For Purchased Receivable Gains Losses ReserveForPurchasedReceivableGainsLosses	94000	USD
CY2018Q4	nrim	Reserve For Purchased Receivable Gains Losses ReserveForPurchasedReceivableGainsLosses	190000	USD
CY2017Q4	nrim	Reserve For Purchased Receivable Gains Losses ReserveForPurchasedReceivableGainsLosses	200000	USD
CY2020Q4	nrim	Reserve For Purchased Receivable Gains Losses ReserveForPurchasedReceivableGainsLosses	73000	USD
CY2019Q4	nrim	Reserve For Purchased Receivable Gains Losses ReserveForPurchasedReceivableGainsLosses	94000	USD
CY2018Q4	nrim	Reserve For Purchased Receivable Gains Losses ReserveForPurchasedReceivableGainsLosses	190000	USD
CY2020Q4	us-gaap	Real Estate Acquired Through Foreclosure RealEstateAcquiredThroughForeclosure	7300000	USD
CY2019Q4	us-gaap	Real Estate Acquired Through Foreclosure RealEstateAcquiredThroughForeclosure	7000000.0	USD
CY2020	nrim	Other Real Estate Owned Expense Net Including Impairment OtherRealEstateOwnedExpenseNetIncludingImpairment	-242000	USD
CY2018	nrim	Other Real Estate Owned Expense Net Including Impairment OtherRealEstateOwnedExpenseNetIncludingImpairment	258000	USD
CY2020Q4	us-gaap	Property Plant And Equipment Gross PropertyPlantAndEquipmentGross	65094000	USD
CY2019Q4	us-gaap	Property Plant And Equipment Gross PropertyPlantAndEquipmentGross	62281000	USD
CY2020Q4	us-gaap	Accumulated Depreciation Depletion And Amortization Property Plant And Equipment AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment	26992000	USD
CY2019Q4	us-gaap	Accumulated Depreciation Depletion And Amortization Property Plant And Equipment AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment	23859000	USD
CY2020Q4	us-gaap	Property Plant And Equipment Net PropertyPlantAndEquipmentNet	38102000	USD
CY2019Q4	us-gaap	Property Plant And Equipment Net PropertyPlantAndEquipmentNet	38422000	USD
CY2020	us-gaap	Depreciation Depreciation	3100000	USD
CY2019	us-gaap	Depreciation Depreciation	3000000.0	USD
CY2020Q4	nrim	Mortgage Loans Servicedfor Third Party MortgageLoansServicedforThirdParty	683117000	USD
CY2019Q4	nrim	Mortgage Loans Servicedfor Third Party MortgageLoansServicedforThirdParty	659048000	USD
CY2020Q4	nrim	Mortgage Servicing Rights Percentof Loans Serviced MortgageServicingRightsPercentofLoansServiced	0.0164
CY2019Q4	nrim	Mortgage Servicing Rights Percentof Loans Serviced MortgageServicingRightsPercentofLoansServiced	0.0181
CY2020Q4	us-gaap	Goodwill Goodwill	15017000	USD
CY2019Q4	us-gaap	Goodwill Goodwill	15017000	USD
CY2020Q4	nrim	Finite Lived Core Deposits Net FiniteLivedCoreDepositsNet	79000	USD
CY2019Q4	nrim	Finite Lived Core Deposits Net FiniteLivedCoreDepositsNet	127000	USD
CY2020Q4	us-gaap	Indefinite Lived Trade Names IndefiniteLivedTradeNames	950000	USD
CY2019Q4	us-gaap	Indefinite Lived Trade Names IndefiniteLivedTradeNames	950000	USD
CY2020Q4	nrim	Goodwill And Intangible Assets GoodwillAndIntangibleAssets	16046000	USD
CY2019Q4	nrim	Goodwill And Intangible Assets GoodwillAndIntangibleAssets	16094000	USD
CY2020	us-gaap	Amortization Of Intangible Assets AmortizationOfIntangibleAssets	48000	USD
CY2019	us-gaap	Amortization Of Intangible Assets AmortizationOfIntangibleAssets	60000	USD
CY2018	us-gaap	Amortization Of Intangible Assets AmortizationOfIntangibleAssets	70000	USD
CY2020Q4	us-gaap	Finite Lived Intangible Assets Accumulated Amortization FiniteLivedIntangibleAssetsAccumulatedAmortization	6000000.0	USD
CY2019Q4	us-gaap	Finite Lived Intangible Assets Accumulated Amortization FiniteLivedIntangibleAssetsAccumulatedAmortization	5900000	USD
CY2020Q4	us-gaap	Finite Lived Intangible Assets Amortization Expense Next Twelve Months FiniteLivedIntangibleAssetsAmortizationExpenseNextTwelveMonths	37000	USD
CY2020Q4	us-gaap	Finite Lived Intangible Assets Amortization Expense Year Two FiniteLivedIntangibleAssetsAmortizationExpenseYearTwo	25000	USD
CY2020Q4	us-gaap	Finite Lived Intangible Assets Amortization Expense Year Three FiniteLivedIntangibleAssetsAmortizationExpenseYearThree	14000	USD
CY2020Q4	us-gaap	Finite Lived Intangible Assets Amortization Expense Year Four FiniteLivedIntangibleAssetsAmortizationExpenseYearFour	3000	USD
CY2020Q4	us-gaap	Finite Lived Intangible Assets Amortization Expense Year Five FiniteLivedIntangibleAssetsAmortizationExpenseYearFive	0	USD
CY2020Q4	us-gaap	Finite Lived Intangible Assets Amortization Expense After Year Five FiniteLivedIntangibleAssetsAmortizationExpenseAfterYearFive	0	USD
CY2020Q4	us-gaap	Finite Lived Intangible Assets Net FiniteLivedIntangibleAssetsNet	79000	USD
CY2020Q4	us-gaap	Operating Lease Right Of Use Asset OperatingLeaseRightOfUseAsset	12400000	USD
CY2020Q4	us-gaap	Operating Lease Liability OperatingLeaseLiability	12400000	USD
CY2019Q4	us-gaap	Operating Lease Right Of Use Asset OperatingLeaseRightOfUseAsset	14300000	USD
CY2019Q4	us-gaap	Operating Lease Liability OperatingLeaseLiability	14200000	USD
CY2020	us-gaap	Operating Lease Cost OperatingLeaseCost	2819000	USD
CY2019	us-gaap	Operating Lease Cost OperatingLeaseCost	2704000	USD
CY2020	us-gaap	Short Term Lease Cost ShortTermLeaseCost	35000	USD
CY2019	us-gaap	Short Term Lease Cost ShortTermLeaseCost	35000	USD
CY2020	us-gaap	Lease Cost LeaseCost	2854000	USD
CY2019	us-gaap	Lease Cost LeaseCost	2739000	USD
CY2020	us-gaap	Operating Lease Payments OperatingLeasePayments	2681000	USD
CY2019	us-gaap	Operating Lease Payments OperatingLeasePayments	2684000	USD
CY2020Q4	us-gaap	Operating Lease Weighted Average Remaining Lease Term1 OperatingLeaseWeightedAverageRemainingLeaseTerm1	P10Y8M19D
CY2019Q4	us-gaap	Operating Lease Weighted Average Remaining Lease Term1 OperatingLeaseWeightedAverageRemainingLeaseTerm1	P10Y9M25D
CY2020Q4	us-gaap	Operating Lease Weighted Average Discount Rate Percent OperatingLeaseWeightedAverageDiscountRatePercent	0.0329
CY2019Q4	us-gaap	Operating Lease Weighted Average Discount Rate Percent OperatingLeaseWeightedAverageDiscountRatePercent	0.0332
CY2020Q4	us-gaap	Lessee Operating Lease Liability Payments Due Next Twelve Months LesseeOperatingLeaseLiabilityPaymentsDueNextTwelveMonths	2619000	USD
CY2020Q4	us-gaap	Lessee Operating Lease Liability Payments Due Year Two LesseeOperatingLeaseLiabilityPaymentsDueYearTwo	2215000	USD
CY2020Q4	us-gaap	Lessee Operating Lease Liability Payments Due Year Three LesseeOperatingLeaseLiabilityPaymentsDueYearThree	1925000	USD
CY2020Q4	us-gaap	Lessee Operating Lease Liability Payments Due Year Four LesseeOperatingLeaseLiabilityPaymentsDueYearFour	1795000	USD
CY2020Q4	us-gaap	Lessee Operating Lease Liability Payments Due Year Five LesseeOperatingLeaseLiabilityPaymentsDueYearFive	1732000	USD
CY2020Q4	us-gaap	Lessee Operating Lease Liability Payments Due After Year Five LesseeOperatingLeaseLiabilityPaymentsDueAfterYearFive	4875000	USD
CY2020Q4	us-gaap	Lessee Operating Lease Liability Payments Due LesseeOperatingLeaseLiabilityPaymentsDue	15161000	USD
CY2020Q4	us-gaap	Lessee Operating Lease Liability Undiscounted Excess Amount LesseeOperatingLeaseLiabilityUndiscountedExcessAmount	2783000	USD
CY2020Q4	us-gaap	Interest Receivable InterestReceivable	7979000	USD
CY2020Q4	us-gaap	Operating Lease Liability OperatingLeaseLiability	12378000	USD
CY2020Q4	us-gaap	Amortization Method Qualified Affordable Housing Project Investments AmortizationMethodQualifiedAffordableHousingProjectInvestments	24142000	USD
CY2019Q4	us-gaap	Amortization Method Qualified Affordable Housing Project Investments AmortizationMethodQualifiedAffordableHousingProjectInvestments	27841000	USD
CY2019Q4	us-gaap	Interest Receivable InterestReceivable	4512000	USD
CY2020Q4	us-gaap	Bank Owned Life Insurance BankOwnedLifeInsurance	6520000	USD
CY2019Q4	us-gaap	Bank Owned Life Insurance BankOwnedLifeInsurance	6393000	USD
CY2020Q4	us-gaap	Income Tax Receivable IncomeTaxReceivable	4083000	USD
CY2019Q4	us-gaap	Income Tax Receivable IncomeTaxReceivable	1429000	USD
CY2020Q4	nrim	Capitalized Software Development Costsfor Software Held For Use CapitalizedSoftwareDevelopmentCostsforSoftwareHeldForUse	3905000	USD
CY2019Q4	nrim	Capitalized Software Development Costsfor Software Held For Use CapitalizedSoftwareDevelopmentCostsforSoftwareHeldForUse	4590000	USD
CY2020Q4	us-gaap	Equity Method Investments EquityMethodInvestments	2462000	USD
CY2019Q4	us-gaap	Equity Method Investments EquityMethodInvestments	2232000	USD
CY2020Q4	us-gaap	Prepaid Expense Current And Noncurrent PrepaidExpenseCurrentAndNoncurrent	2404000	USD
CY2019Q4	us-gaap	Prepaid Expense Current And Noncurrent PrepaidExpenseCurrentAndNoncurrent	1649000	USD
CY2020Q4	us-gaap	Deferred Tax Assets Liabilities Net DeferredTaxAssetsLiabilitiesNet	1980000	USD
CY2019Q4	us-gaap	Deferred Tax Assets Liabilities Net DeferredTaxAssetsLiabilitiesNet	2535000	USD
CY2020Q4	us-gaap	Foreclosed Assets ForeclosedAssets	231000	USD
CY2019Q4	us-gaap	Foreclosed Assets ForeclosedAssets	231000	USD
CY2020Q4	us-gaap	Other Assets Miscellaneous OtherAssetsMiscellaneous	2051000	USD
CY2019Q4	us-gaap	Other Assets Miscellaneous OtherAssetsMiscellaneous	1690000	USD
CY2020Q4	us-gaap	Other Assets OtherAssets	68488000	USD
CY2019Q4	us-gaap	Other Assets OtherAssets	58076000	USD
CY2020	us-gaap	Amortization Method Qualified Affordable Housing Project Investments Amortization AmortizationMethodQualifiedAffordableHousingProjectInvestmentsAmortization	3500000	USD
CY2019	us-gaap	Amortization Method Qualified Affordable Housing Project Investments Amortization AmortizationMethodQualifiedAffordableHousingProjectInvestmentsAmortization	2700000	USD
CY2018	us-gaap	Amortization Method Qualified Affordable Housing Project Investments Amortization AmortizationMethodQualifiedAffordableHousingProjectInvestmentsAmortization	2700000	USD
CY2020Q4	us-gaap	Qualified Affordable Housing Project Investments Commitment QualifiedAffordableHousingProjectInvestmentsCommitment	9900000	USD
CY2020Q4	nrim	Qualified Affordable Housing Project Investments Original Commitment QualifiedAffordableHousingProjectInvestmentsOriginalCommitment	42859000	USD
CY2020Q4	nrim	Qualified Affordable Housing Project Investments Lifetodate Contributions QualifiedAffordableHousingProjectInvestmentsLifetodateContributions	32993000	USD
CY2020Q4	us-gaap	Qualified Affordable Housing Project Investments Commitment QualifiedAffordableHousingProjectInvestmentsCommitment	9866000	USD
CY2020Q4	us-gaap	Time Deposit Maturities Year One TimeDepositMaturitiesYearOne	128970000	USD
CY2020Q4	us-gaap	Time Deposit Maturities Year Two TimeDepositMaturitiesYearTwo	37347000	USD
CY2020Q4	us-gaap	Time Deposit Maturities Year Three TimeDepositMaturitiesYearThree	6890000	USD
CY2020Q4	us-gaap	Time Deposit Maturities Year Four TimeDepositMaturitiesYearFour	495000	USD
CY2020Q4	us-gaap	Time Deposit Maturities Year Five TimeDepositMaturitiesYearFive	135000	USD
CY2020Q4	us-gaap	Time Deposit Maturities After Year Five TimeDepositMaturitiesAfterYearFive	1794000	USD
CY2020Q4	us-gaap	Interest Bearing Domestic Deposit Certificates Of Deposits InterestBearingDomesticDepositCertificatesOfDeposits	175631000	USD
CY2019	us-gaap	Other Comprehensive Income Loss Tax OtherComprehensiveIncomeLossTax	757000	USD
CY2020Q4	nrim	Regulatory Limiton Borrowing RegulatoryLimitonBorrowing	736000000.0	USD
CY2019	nrim	Regulatory Limiton Borrowing Percentageof Total Assets RegulatoryLimitonBorrowingPercentageofTotalAssets	0.15
CY2020Q4	us-gaap	Related Party Deposit Liabilities RelatedPartyDepositLiabilities	4600000	USD
CY2019Q4	us-gaap	Related Party Deposit Liabilities RelatedPartyDepositLiabilities	1600000	USD
CY2020	us-gaap	Interest Expense Domestic Deposit Liabilities Notice Of Withdrawal InterestExpenseDomesticDepositLiabilitiesNoticeOfWithdrawal	108000	USD
CY2019	us-gaap	Interest Expense Domestic Deposit Liabilities Notice Of Withdrawal InterestExpenseDomesticDepositLiabilitiesNoticeOfWithdrawal	182000	USD
CY2018	us-gaap	Interest Expense Domestic Deposit Liabilities Notice Of Withdrawal InterestExpenseDomesticDepositLiabilitiesNoticeOfWithdrawal	8000	USD
CY2020	us-gaap	Interest Expense Money Market Deposits InterestExpenseMoneyMarketDeposits	1222000	USD
CY2019	us-gaap	Interest Expense Money Market Deposits InterestExpenseMoneyMarketDeposits	1435000	USD
CY2018	us-gaap	Interest Expense Money Market Deposits InterestExpenseMoneyMarketDeposits	855000	USD
CY2020	us-gaap	Interest Expense Savings Deposits InterestExpenseSavingsDeposits	717000	USD
CY2019	us-gaap	Interest Expense Savings Deposits InterestExpenseSavingsDeposits	1083000	USD
CY2018	us-gaap	Interest Expense Savings Deposits InterestExpenseSavingsDeposits	744000	USD
CY2020	nrim	Interest Expense Time Deposits250000or More InterestExpenseTimeDeposits250000orMore	1823000	USD
CY2019	nrim	Interest Expense Time Deposits250000or More InterestExpenseTimeDeposits250000orMore	1310000	USD
CY2018	nrim	Interest Expense Time Deposits250000or More InterestExpenseTimeDeposits250000orMore	472000	USD
CY2020	nrim	Interest Expense Time Deposits Lessthan250000 InterestExpenseTimeDepositsLessthan250000	1409000	USD
CY2019	nrim	Interest Expense Time Deposits Lessthan250000 InterestExpenseTimeDepositsLessthan250000	951000	USD
CY2018	nrim	Interest Expense Time Deposits Lessthan250000 InterestExpenseTimeDepositsLessthan250000	228000	USD
CY2020	us-gaap	Interest Expense Deposits InterestExpenseDeposits	5279000	USD
CY2019	us-gaap	Interest Expense Deposits InterestExpenseDeposits	4961000	USD
CY2018	us-gaap	Interest Expense Deposits InterestExpenseDeposits	2307000	USD
CY2020Q4	nrim	Lineof Credit Facility Ratioof Eligible Assetsto Borrowing Capacity LineofCreditFacilityRatioofEligibleAssetstoBorrowingCapacity	0.45
CY2020Q4	us-gaap	Line Of Credit Facility Maximum Borrowing Capacity LineOfCreditFacilityMaximumBorrowingCapacity	232700000	USD
CY2020Q4	nrim	Lineof Credit Facility Ratioof Total Assetsto Borrowing Capacity LineofCreditFacilityRatioofTotalAssetstoBorrowingCapacity	0.11
CY2020Q4	nrim	Lineof Credit Facility Ratioof Additional Eligible Assetsto Borrowing Capacity LineofCreditFacilityRatioofAdditionalEligibleAssetstoBorrowingCapacity	0.45
CY2020Q4	nrim	Lineof Credit Facility Additional Borrowing Capacity Available LineofCreditFacilityAdditionalBorrowingCapacityAvailable	946200000	USD
CY2020Q4	us-gaap	Federal Home Loan Bank Advances Long Term FederalHomeLoanBankAdvancesLongTerm	14800000	USD
CY2019Q4	us-gaap	Federal Home Loan Bank Advances Long Term FederalHomeLoanBankAdvancesLongTerm	8900000	USD
CY2020	nrim	Federal Home Loan Bank Advance Repayment Term FederalHomeLoanBankAdvanceRepaymentTerm	P30Y
CY2019Q4	nrim	Federal Reserve Bank Advances Discount Window FederalReserveBankAdvancesDiscountWindow	0	USD
CY2020Q4	nrim	Federal Reserve Bank Advances Discount Window FederalReserveBankAdvancesDiscountWindow	0	USD
CY2020	nrim	Regulatory Limiton Borrowing Percentageof Total Assets RegulatoryLimitonBorrowingPercentageofTotalAssets	0.35
CY2019Q4	nrim	Regulatory Limiton Borrowing RegulatoryLimitonBorrowing	244700000	USD
CY2020Q4	us-gaap	Securities Sold Under Agreements To Repurchase SecuritiesSoldUnderAgreementsToRepurchase	0	USD
CY2019Q4	us-gaap	Securities Sold Under Agreements To Repurchase SecuritiesSoldUnderAgreementsToRepurchase	0	USD
CY2020Q4	nrim	Securities Sold Under Agreements To Repurchase Average Balance Outstanding SecuritiesSoldUnderAgreementsToRepurchaseAverageBalanceOutstanding	0	USD
CY2019Q4	nrim	Securities Sold Under Agreements To Repurchase Average Balance Outstanding SecuritiesSoldUnderAgreementsToRepurchaseAverageBalanceOutstanding	15200000	USD
CY2020	nrim	Securities Sold Under Agreements To Repurchase Maximum Amount Outstanding At Any Month End SecuritiesSoldUnderAgreementsToRepurchaseMaximumAmountOutstandingAtAnyMonthEnd	0	USD
CY2019	nrim	Securities Sold Under Agreements To Repurchase Maximum Amount Outstanding At Any Month End SecuritiesSoldUnderAgreementsToRepurchaseMaximumAmountOutstandingAtAnyMonthEnd	36600000	USD
CY2020Q4	us-gaap	Long Term Debt Maturities Repayments Of Principal In Next Twelve Months LongTermDebtMaturitiesRepaymentsOfPrincipalInNextTwelveMonths	312000	USD
CY2020Q4	us-gaap	Long Term Debt Maturities Repayments Of Principal In Year Two LongTermDebtMaturitiesRepaymentsOfPrincipalInYearTwo	412000	USD
CY2020Q4	us-gaap	Long Term Debt Maturities Repayments Of Principal In Year Three LongTermDebtMaturitiesRepaymentsOfPrincipalInYearThree	421000	USD
CY2020Q4	us-gaap	Long Term Debt Maturities Repayments Of Principal In Year Four LongTermDebtMaturitiesRepaymentsOfPrincipalInYearFour	431000	USD
CY2020Q4	us-gaap	Long Term Debt Maturities Repayments Of Principal In Year Five LongTermDebtMaturitiesRepaymentsOfPrincipalInYearFive	441000	USD
CY2020Q4	us-gaap	Long Term Debt Maturities Repayments Of Principal After Year Five LongTermDebtMaturitiesRepaymentsOfPrincipalAfterYearFive	12800000	USD
CY2020Q4	us-gaap	Long Term Debt LongTermDebt	14817000	USD
CY2020Q4	us-gaap	Debt Weighted Average Interest Rate DebtWeightedAverageInterestRate	0.0312
CY2019	us-gaap	Other Comprehensive Income Loss Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent	951000	USD
CY2019Q4	us-gaap	Debt Weighted Average Interest Rate DebtWeightedAverageInterestRate	0.0339
CY2018Q4	us-gaap	Debt Weighted Average Interest Rate DebtWeightedAverageInterestRate	0.0339
CY2018	us-gaap	Other Comprehensive Income Loss Tax OtherComprehensiveIncomeLossTax	210000	USD
CY2018	us-gaap	Other Comprehensive Income Loss Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent	-59000	USD
CY2019	us-gaap	Revenue Not From Contract With Customer RevenueNotFromContractWithCustomer	31149000	USD
CY2020	us-gaap	Other Comprehensive Income Loss Tax OtherComprehensiveIncomeLossTax	1600000	USD
CY2020	us-gaap	Other Comprehensive Income Loss Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent	-413000	USD
CY2020	us-gaap	Revenue Not From Contract With Customer RevenueNotFromContractWithCustomer	57861000	USD
CY2018	us-gaap	Revenue Not From Contract With Customer RevenueNotFromContractWithCustomer	26256000	USD
CY2020	us-gaap	Noninterest Income NoninterestIncome	63328000	USD
CY2019	us-gaap	Noninterest Income NoninterestIncome	37346000	USD
CY2018	us-gaap	Noninterest Income NoninterestIncome	32167000	USD
CY2020	nrim	Defined Contribution Plan Mandatory Employer Matching Contribution Amount Of Match DefinedContributionPlanMandatoryEmployerMatchingContributionAmountOfMatch	1.00	USD
CY2020	us-gaap	Defined Contribution Plan Maximum Annual Contributions Per Employee Percent DefinedContributionPlanMaximumAnnualContributionsPerEmployeePercent	0.055
CY2020	us-gaap	Defined Contribution Plan Cost Recognized DefinedContributionPlanCostRecognized	1700000	USD
CY2019	us-gaap	Defined Contribution Plan Cost Recognized DefinedContributionPlanCostRecognized	1400000	USD
CY2018	us-gaap	Defined Contribution Plan Cost Recognized DefinedContributionPlanCostRecognized	1400000	USD
CY2020	nrim	Increase Decreasein Deferred Compensation Arrangement IncreaseDecreaseinDeferredCompensationArrangement	78000	USD
CY2019	nrim	Increase Decreasein Deferred Compensation Arrangement IncreaseDecreaseinDeferredCompensationArrangement	36000	USD
CY2018	nrim	Increase Decreasein Deferred Compensation Arrangement IncreaseDecreaseinDeferredCompensationArrangement	52000	USD
CY2020Q4	us-gaap	Deferred Compensation Arrangement With Individual Recorded Liability DeferredCompensationArrangementWithIndividualRecordedLiability	1600000	USD
CY2019Q4	us-gaap	Deferred Compensation Arrangement With Individual Recorded Liability DeferredCompensationArrangementWithIndividualRecordedLiability	1600000	USD
CY2020	us-gaap	Deferred Compensation Arrangement With Individual Distribution Paid DeferredCompensationArrangementWithIndividualDistributionPaid	3700000	USD
CY2019	us-gaap	Deferred Compensation Arrangement With Individual Distribution Paid DeferredCompensationArrangementWithIndividualDistributionPaid	2900000	USD
CY2018	us-gaap	Deferred Compensation Arrangement With Individual Distribution Paid DeferredCompensationArrangementWithIndividualDistributionPaid	1300000	USD
CY2020	nrim	Duration Limit On Stop Loss Insurance Per Individual DurationLimitOnStopLossInsurancePerIndividual	P1Y
CY2020	nrim	Limit On Stop Loss Insurance Per Covered Individual In Year LimitOnStopLossInsurancePerCoveredIndividualInYear	175000	USD
CY2020Q4	us-gaap	Commitments Fair Value Disclosure CommitmentsFairValueDisclosure	375065000	USD
CY2019Q4	us-gaap	Commitments Fair Value Disclosure CommitmentsFairValueDisclosure	301911000	USD
CY2020Q4	nrim	Unfunded Lending Commitment UnfundedLendingCommitment	150276000	USD
CY2019Q4	nrim	Unfunded Lending Commitment UnfundedLendingCommitment	48796000	USD
CY2020Q4	nrim	Standby Letters Of Credit Fair Value Disclosure StandbyLettersOfCreditFairValueDisclosure	2333000	USD
CY2019Q4	nrim	Standby Letters Of Credit Fair Value Disclosure StandbyLettersOfCreditFairValueDisclosure	2006000	USD
CY2020Q4	nrim	Loan Repurchase Dueto Deficiency Accumulated Two Year Total LoanRepurchaseDuetoDeficiencyAccumulatedTwoYearTotal	1	loan
CY2020Q4	nrim	Unfunded Commitments UnfundedCommitments	527700000	USD
CY2019Q4	nrim	Unfunded Commitments UnfundedCommitments	352700000	USD
CY2020Q4	nrim	Reservefor Unfunded Loan Commitmentsand Lettersof Credit ReserveforUnfundedLoanCommitmentsandLettersofCredit	187000	USD
CY2019Q4	nrim	Reservefor Unfunded Loan Commitmentsand Lettersof Credit ReserveforUnfundedLoanCommitmentsandLettersofCredit	152000	USD
CY2020	nrim	Derivatives Value Shortfalls Threshold Triggering Additional Collateral Requirements DerivativesValueShortfallsThresholdTriggeringAdditionalCollateralRequirements	250000	USD
CY2020Q4	us-gaap	Collateral Already Posted Aggregate Fair Value CollateralAlreadyPostedAggregateFairValue	10700000	USD
CY2019Q4	us-gaap	Collateral Already Posted Aggregate Fair Value CollateralAlreadyPostedAggregateFairValue	4700000	USD
CY2020Q4	us-gaap	Derivative Notional Amount DerivativeNotionalAmount	196000000.0	USD
CY2019Q4	us-gaap	Derivative Notional Amount DerivativeNotionalAmount	94400000	USD
CY2020Q4	us-gaap	Derivative Number Of Instruments Held DerivativeNumberOfInstrumentsHeld	32	swap
CY2020	us-gaap	Interest And Fee Income Loans Commercial InterestAndFeeIncomeLoansCommercial	949000	USD
CY2019	us-gaap	Interest And Fee Income Loans Commercial InterestAndFeeIncomeLoansCommercial	964000	USD
CY2018	us-gaap	Interest And Fee Income Loans Commercial InterestAndFeeIncomeLoansCommercial	84000	USD
CY2020	us-gaap	Payments Of Dividends PaymentsOfDividends	8800000	USD
CY2019	us-gaap	Payments Of Dividends PaymentsOfDividends	8500000	USD
CY2018	us-gaap	Payments Of Dividends PaymentsOfDividends	7100000	USD
CY2020	us-gaap	Common Stock Dividends Per Share Cash Paid CommonStockDividendsPerShareCashPaid	1.38
CY2019	us-gaap	Common Stock Dividends Per Share Cash Paid CommonStockDividendsPerShareCashPaid	1.26
CY2018	us-gaap	Common Stock Dividends Per Share Cash Paid CommonStockDividendsPerShareCashPaid	1.02
CY2020Q1	nrim	Stock Repurchase Program Percentage Of Outstanding Common Stock Authorized For Repurchase StockRepurchaseProgramPercentageOfOutstandingCommonStockAuthorizedForRepurchase	0.05
CY2020Q4	us-gaap	Stock Repurchase Program Remaining Number Of Shares Authorized To Be Repurchased StockRepurchaseProgramRemainingNumberOfSharesAuthorizedToBeRepurchased	0	shares
CY2020	us-gaap	Stock Repurchased During Period Shares StockRepurchasedDuringPeriodShares	327000	shares
CY2019	us-gaap	Stock Repurchased During Period Shares StockRepurchasedDuringPeriodShares	347676	shares
CY2018	us-gaap	Stock Repurchased During Period Shares StockRepurchasedDuringPeriodShares	15468	shares
CY2020	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Grants In Period Weighted Average Grant Date Fair Value ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageGrantDateFairValue	6.55
CY2019	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Grants In Period Weighted Average Grant Date Fair Value ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageGrantDateFairValue	5.34
CY2018	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Grants In Period Weighted Average Grant Date Fair Value ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageGrantDateFairValue	7.69
CY2020	us-gaap	Sharebased Compensation Arrangement By Sharebased Payment Award Fair Value Assumptions Expected Term1 SharebasedCompensationArrangementBySharebasedPaymentAwardFairValueAssumptionsExpectedTerm1	P8Y
CY2019	us-gaap	Sharebased Compensation Arrangement By Sharebased Payment Award Fair Value Assumptions Expected Term1 SharebasedCompensationArrangementBySharebasedPaymentAwardFairValueAssumptionsExpectedTerm1	P8Y
CY2018	us-gaap	Sharebased Compensation Arrangement By Sharebased Payment Award Fair Value Assumptions Expected Term1 SharebasedCompensationArrangementBySharebasedPaymentAwardFairValueAssumptionsExpectedTerm1	P8Y
CY2020	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Fair Value Assumptions Risk Free Interest Rate ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsRiskFreeInterestRate	0.0079
CY2019	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Fair Value Assumptions Risk Free Interest Rate ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsRiskFreeInterestRate	0.0174
CY2018	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Fair Value Assumptions Risk Free Interest Rate ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsRiskFreeInterestRate	0.0301
CY2020	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Fair Value Assumptions Expected Dividend Rate ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedDividendRate	0.0455
CY2019	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Fair Value Assumptions Expected Dividend Rate ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedDividendRate	0.0411
CY2018	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Fair Value Assumptions Expected Dividend Rate ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedDividendRate	0.0291
CY2020	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Fair Value Assumptions Expected Volatility Rate ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedVolatilityRate	0.3544
CY2019	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Fair Value Assumptions Expected Volatility Rate ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedVolatilityRate	0.2434
CY2018	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Fair Value Assumptions Expected Volatility Rate ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedVolatilityRate	0.2347
CY2019Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Number ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber	158620	shares
CY2019Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Weighted Average Exercise Price ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice	30.45
CY2020	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Grants In Period Gross ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodGross	20173	shares
CY2020	us-gaap	Share Based Compensation Arrangements By Share Based Payment Award Options Grants In Period Weighted Average Exercise Price ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageExercisePrice	32.09
CY2020	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Forfeitures And Expirations In Period ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsForfeituresAndExpirationsInPeriod	0	shares
CY2020	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Forfeitures And Expirations In Period Weighted Average Exercise Price ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsForfeituresAndExpirationsInPeriodWeightedAverageExercisePrice	0
CY2020	us-gaap	Stock Issued During Period Shares Stock Options Exercised StockIssuedDuringPeriodSharesStockOptionsExercised	0	shares
CY2020	us-gaap	Share Based Compensation Arrangements By Share Based Payment Award Options Exercises In Period Weighted Average Exercise Price ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsExercisesInPeriodWeightedAverageExercisePrice	0
CY2020Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Number ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber	178793	shares
CY2020	us-gaap	Other Income Tax Expense Benefit Continuing Operations OtherIncomeTaxExpenseBenefitContinuingOperations	3506000	USD
CY2020Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Weighted Average Exercise Price ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice	30.64
CY2019Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Exercisable Weighted Average Exercise Price ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableWeightedAverageExercisePrice	28.17
CY2018Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Exercisable Weighted Average Exercise Price ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableWeightedAverageExercisePrice	26.50
CY2020Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Vested And Expected To Vest Exercisable Aggregate Intrinsic Value ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsVestedAndExpectedToVestExercisableAggregateIntrinsicValue	682000	USD
CY2020	us-gaap	Sharebased Compensation Arrangement By Sharebased Payment Award Options Outstanding Weighted Average Remaining Contractual Term2 SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsOutstandingWeightedAverageRemainingContractualTerm2	P6Y3M14D
CY2020Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Exercisable Number ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableNumber	136038	shares
CY2019Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Exercisable Number ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableNumber	112319	shares
CY2018Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Exercisable Number ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableNumber	100824	shares
CY2020Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Exercisable Weighted Average Exercise Price ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableWeightedAverageExercisePrice	29.42
CY2020Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Vested And Expected To Vest Outstanding Aggregate Intrinsic Value ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsVestedAndExpectedToVestOutstandingAggregateIntrinsicValue	682000	USD
CY2019Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Vested And Expected To Vest Outstanding Aggregate Intrinsic Value ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsVestedAndExpectedToVestOutstandingAggregateIntrinsicValue	1100000	USD
CY2019Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Vested And Expected To Vest Exercisable Aggregate Intrinsic Value ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsVestedAndExpectedToVestExercisableAggregateIntrinsicValue	1100000	USD
CY2018Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Vested And Expected To Vest Outstanding Aggregate Intrinsic Value ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsVestedAndExpectedToVestOutstandingAggregateIntrinsicValue	646000	USD
CY2018Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Vested And Expected To Vest Exercisable Aggregate Intrinsic Value ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsVestedAndExpectedToVestExercisableAggregateIntrinsicValue	646000	USD
CY2020	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Exercises In Period Total Intrinsic Value ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisesInPeriodTotalIntrinsicValue	0	USD
CY2019	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Exercises In Period Total Intrinsic Value ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisesInPeriodTotalIntrinsicValue	203000	USD
CY2018	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Exercises In Period Total Intrinsic Value ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisesInPeriodTotalIntrinsicValue	383000	USD
CY2005Q4	us-gaap	Proceeds From Repurchase Of Trust Preferred Securities ProceedsFromRepurchaseOfTrustPreferredSecurities	10000000	USD
CY2020Q4	nrim	Tier One Common Equity Capital Requiredfor Capital Adequacyto Risk Based Assets Conservation Buffer TierOneCommonEquityCapitalRequiredforCapitalAdequacytoRiskBasedAssetsConservationBuffer	0.025
CY2020	us-gaap	Current Federal Tax Expense Benefit CurrentFederalTaxExpenseBenefit	3607000	USD
CY2020	us-gaap	Deferred Federal Income Tax Expense Benefit DeferredFederalIncomeTaxExpenseBenefit	371000	USD
CY2020	us-gaap	Federal Income Tax Expense Benefit Continuing Operations FederalIncomeTaxExpenseBenefitContinuingOperations	3978000	USD
CY2020	us-gaap	Current State And Local Tax Expense Benefit CurrentStateAndLocalTaxExpenseBenefit	1891000	USD
CY2020	us-gaap	Deferred State And Local Income Tax Expense Benefit DeferredStateAndLocalIncomeTaxExpenseBenefit	184000	USD
CY2020	us-gaap	State And Local Income Tax Expense Benefit Continuing Operations StateAndLocalIncomeTaxExpenseBenefitContinuingOperations	2075000	USD
CY2020	us-gaap	Other Tax Expense Benefit OtherTaxExpenseBenefit	3506000	USD
CY2020	us-gaap	Deferred Other Tax Expense Benefit DeferredOtherTaxExpenseBenefit	0	USD
CY2020	us-gaap	Current Income Tax Expense Benefit CurrentIncomeTaxExpenseBenefit	9004000	USD
CY2020	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	555000	USD
CY2020	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	9559000	USD
CY2019	us-gaap	Deferred State And Local Income Tax Expense Benefit DeferredStateAndLocalIncomeTaxExpenseBenefit	235000	USD
CY2019	us-gaap	State And Local Income Tax Expense Benefit Continuing Operations StateAndLocalIncomeTaxExpenseBenefitContinuingOperations	1212000	USD
CY2019	us-gaap	Current Federal Tax Expense Benefit CurrentFederalTaxExpenseBenefit	1078000	USD
CY2019	us-gaap	Deferred Federal Income Tax Expense Benefit DeferredFederalIncomeTaxExpenseBenefit	476000	USD
CY2019	us-gaap	Federal Income Tax Expense Benefit Continuing Operations FederalIncomeTaxExpenseBenefitContinuingOperations	1554000	USD
CY2019	us-gaap	Current State And Local Tax Expense Benefit CurrentStateAndLocalTaxExpenseBenefit	977000	USD
CY2019	us-gaap	Other Tax Expense Benefit OtherTaxExpenseBenefit	2668000	USD
CY2019	us-gaap	Deferred Other Tax Expense Benefit DeferredOtherTaxExpenseBenefit	0	USD
CY2019	us-gaap	Other Income Tax Expense Benefit Continuing Operations OtherIncomeTaxExpenseBenefitContinuingOperations	2668000	USD
CY2019	us-gaap	Current Income Tax Expense Benefit CurrentIncomeTaxExpenseBenefit	4723000	USD
CY2019	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	711000	USD
CY2019	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	5434000	USD
CY2018	us-gaap	Current Federal Tax Expense Benefit CurrentFederalTaxExpenseBenefit	-1549000	USD
CY2018	us-gaap	Deferred Federal Income Tax Expense Benefit DeferredFederalIncomeTaxExpenseBenefit	2017000	USD
CY2018	us-gaap	Federal Income Tax Expense Benefit Continuing Operations FederalIncomeTaxExpenseBenefitContinuingOperations	468000	USD
CY2018	us-gaap	Current State And Local Tax Expense Benefit CurrentStateAndLocalTaxExpenseBenefit	-85000	USD
CY2018	us-gaap	Deferred State And Local Income Tax Expense Benefit DeferredStateAndLocalIncomeTaxExpenseBenefit	997000	USD
CY2018	us-gaap	State And Local Income Tax Expense Benefit Continuing Operations StateAndLocalIncomeTaxExpenseBenefitContinuingOperations	912000	USD
CY2018	us-gaap	Other Tax Expense Benefit OtherTaxExpenseBenefit	2691000	USD
CY2018	us-gaap	Deferred Other Tax Expense Benefit DeferredOtherTaxExpenseBenefit	0	USD
CY2018	us-gaap	Other Income Tax Expense Benefit Continuing Operations OtherIncomeTaxExpenseBenefitContinuingOperations	2691000	USD
CY2018	us-gaap	Current Income Tax Expense Benefit CurrentIncomeTaxExpenseBenefit	1057000	USD
CY2018	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	3014000	USD
CY2018	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	4071000	USD
CY2020	us-gaap	Income Tax Reconciliation Income Tax Expense Benefit At Federal Statutory Income Tax Rate IncomeTaxReconciliationIncomeTaxExpenseBenefitAtFederalStatutoryIncomeTaxRate	8914000	USD
CY2019	us-gaap	Income Tax Reconciliation Income Tax Expense Benefit At Federal Statutory Income Tax Rate IncomeTaxReconciliationIncomeTaxExpenseBenefitAtFederalStatutoryIncomeTaxRate	5486000	USD
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CY2018Q4	nrim	Deferred Tax Assets Tax Deferred Expenses Related To Other Real Estate Owned DeferredTaxAssetsTaxDeferredExpensesRelatedToOtherRealEstateOwned	160000	USD
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CY2020Q4	nrim	Deferred Tax Asset Loan Discount DeferredTaxAssetLoanDiscount	93000	USD
CY2019Q4	nrim	Deferred Tax Asset Loan Discount DeferredTaxAssetLoanDiscount	98000	USD
CY2018Q4	nrim	Deferred Tax Asset Loan Discount DeferredTaxAssetLoanDiscount	79000	USD
CY2020Q4	nrim	Deferred Tax Asset Fair Value Adjustmenton Certificatesof Deposit DeferredTaxAssetFairValueAdjustmentonCertificatesofDeposit	76000	USD
CY2019Q4	nrim	Deferred Tax Asset Fair Value Adjustmenton Certificatesof Deposit DeferredTaxAssetFairValueAdjustmentonCertificatesofDeposit	100000	USD
CY2018Q4	nrim	Deferred Tax Asset Fair Value Adjustmenton Certificatesof Deposit DeferredTaxAssetFairValueAdjustmentonCertificatesofDeposit	123000	USD
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CY2019Q4	nrim	Deferred Tax Assets Operating Lease Liability DeferredTaxAssetsOperatingLeaseLiability	4045000	USD
CY2020Q4	us-gaap	Deferred Tax Assets Other DeferredTaxAssetsOther	2330000	USD
CY2019Q4	us-gaap	Deferred Tax Assets Other DeferredTaxAssetsOther	1866000	USD
CY2018Q4	us-gaap	Deferred Tax Assets Other DeferredTaxAssetsOther	1069000	USD
CY2020Q4	us-gaap	Deferred Tax Assets Net DeferredTaxAssetsNet	13470000	USD
CY2019Q4	us-gaap	Deferred Tax Assets Net DeferredTaxAssetsNet	13010000	USD
CY2018Q4	us-gaap	Deferred Tax Assets Net DeferredTaxAssetsNet	8300000	USD
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CY2018Q4	nrim	Deferred Tax Liabilities Intangible Amortization DeferredTaxLiabilitiesIntangibleAmortization	288000	USD
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CY2020Q4	nrim	Deferred Tax Liability Depreciationand Amortization DeferredTaxLiabilityDepreciationandAmortization	2066000	USD
CY2019Q4	nrim	Deferred Tax Liability Depreciationand Amortization DeferredTaxLiabilityDepreciationandAmortization	1848000	USD
CY2018Q4	nrim	Deferred Tax Liability Depreciationand Amortization DeferredTaxLiabilityDepreciationandAmortization	1873000	USD
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CY2020Q4	us-gaap	Deferred Tax Liabilities Other DeferredTaxLiabilitiesOther	483000	USD
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CY2020Q4	us-gaap	Deferred Income Tax Liabilities DeferredIncomeTaxLiabilities	11490000	USD
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CY2020Q4	us-gaap	Unrecognized Tax Benefits UnrecognizedTaxBenefits	0	USD
CY2020Q4	us-gaap	Income Tax Examination Increase Decrease In Liability From Prior Year IncomeTaxExaminationIncreaseDecreaseInLiabilityFromPriorYear	-454000	USD
CY2019Q4	us-gaap	Income Tax Examination Increase Decrease In Liability From Prior Year IncomeTaxExaminationIncreaseDecreaseInLiabilityFromPriorYear	-250000	USD
CY2020Q4	us-gaap	Available For Sale Securities Debt Securities AvailableForSaleSecuritiesDebtSecurities	247633000	USD
CY2020Q4	us-gaap	Equity Securities Fv Ni EquitySecuritiesFvNi	9052000	USD
CY2020Q4	us-gaap	Held To Maturity Securities Fair Value HeldToMaturitySecuritiesFairValue	10000000	USD
CY2020Q4	us-gaap	Other Assets Fair Value Disclosure OtherAssetsFairValueDisclosure	23949000	USD
CY2020Q4	us-gaap	Financial Liabilities Fair Value Disclosure FinancialLiabilitiesFairValueDisclosure	10002000	USD
CY2019Q4	us-gaap	Available For Sale Securities Debt Securities AvailableForSaleSecuritiesDebtSecurities	276138000	USD
CY2019Q4	us-gaap	Equity Securities Fv Ni EquitySecuritiesFvNi	7945000	USD
CY2019Q4	us-gaap	Other Assets Fair Value Disclosure OtherAssetsFairValueDisclosure	16894000	USD
CY2019Q4	us-gaap	Financial Liabilities Fair Value Disclosure FinancialLiabilitiesFairValueDisclosure	3555000	USD
CY2019Q4	us-gaap	Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Asset Value FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetValue	13944000	USD
CY2020	us-gaap	Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Asset Gain Loss Included In Earnings1 FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetGainLossIncludedInEarnings1	-11305000	USD
CY2020	nrim	Fair Value Measurementwith Unobservable Inputs Reconciliation Recurring Basis Asset Purchasesand Issuances FairValueMeasurementwithUnobservableInputsReconciliationRecurringBasisAssetPurchasesandIssuances	64205000	USD
CY2020	nrim	Fair Value Measurementwith Unobservable Inputs Reconciliation Recurring Basis Asset Salesand Settlements FairValueMeasurementwithUnobservableInputsReconciliationRecurringBasisAssetSalesandSettlements	40282000	USD
CY2020Q4	us-gaap	Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Asset Value FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetValue	26562000	USD
CY2018Q4	us-gaap	Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Asset Value FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetValue	12829000	USD
CY2019	us-gaap	Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Asset Gain Loss Included In Earnings1 FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetGainLossIncludedInEarnings1	-4544000	USD
CY2019	nrim	Fair Value Measurementwith Unobservable Inputs Reconciliation Recurring Basis Asset Purchasesand Issuances FairValueMeasurementwithUnobservableInputsReconciliationRecurringBasisAssetPurchasesandIssuances	19789000	USD
CY2019	nrim	Fair Value Measurementwith Unobservable Inputs Reconciliation Recurring Basis Asset Salesand Settlements FairValueMeasurementwithUnobservableInputsReconciliationRecurringBasisAssetSalesandSettlements	14130000	USD
CY2019Q4	us-gaap	Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Asset Value FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetValue	13944000	USD
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CY2018	nrim	Assets Fair Value Disclosure Nonrecurring Gain Loss AssetsFairValueDisclosureNonrecurringGainLoss	148000	USD
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CY2020	us-gaap	Interest Expense InterestExpense	6051000	USD
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CY2020	us-gaap	Noninterest Income NoninterestIncome	63328000	USD
CY2020Q4	us-gaap	Assets Assets	2121798000	USD
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CY2019	us-gaap	Interest And Dividend Income Operating InterestAndDividendIncomeOperating	70083000	USD
CY2019	us-gaap	Interest Expense InterestExpense	5641000	USD
CY2019	us-gaap	Interest Income Expense Net InterestIncomeExpenseNet	64442000	USD
CY2019	us-gaap	Provision For Loan And Lease Losses ProvisionForLoanAndLeaseLosses	-1175000	USD
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CY2020	us-gaap	Income Loss From Continuing Operations Before Income Taxes Minority Interest And Income Loss From Equity Method Investments IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments	42447000	USD
CY2020	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	9559000	USD
CY2020	us-gaap	Net Income Loss NetIncomeLoss	32888000	USD
CY2019	us-gaap	Noninterest Income NoninterestIncome	37346000	USD
CY2019	nrim	Compensation Expense Acquisition Payments CompensationExpenseAcquisitionPayments	468000	USD
CY2019	nrim	Noninterest Expense Excluding Compensation Expense Acquisition Payments NoninterestExpenseExcludingCompensationExpenseAcquisitionPayments	76370000	USD
CY2019	us-gaap	Income Loss From Continuing Operations Before Income Taxes Minority Interest And Income Loss From Equity Method Investments IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments	26125000	USD
CY2019	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	5434000	USD
CY2019	us-gaap	Net Income Loss NetIncomeLoss	20691000	USD
CY2019Q4	us-gaap	Assets Assets	1643996000	USD
CY2019Q4	us-gaap	Loans Receivable Held For Sale Net Not Part Of Disposal Group LoansReceivableHeldForSaleNetNotPartOfDisposalGroup	67834000	USD
CY2018	us-gaap	Interest And Dividend Income Operating InterestAndDividendIncomeOperating	64177000	USD
CY2018	us-gaap	Interest Expense InterestExpense	2969000	USD
CY2018	us-gaap	Interest Income Expense Net InterestIncomeExpenseNet	61208000	USD
CY2018	us-gaap	Provision For Loan And Lease Losses ProvisionForLoanAndLeaseLosses	-500000	USD
CY2018	us-gaap	Noninterest Income NoninterestIncome	32167000	USD
CY2018	nrim	Noninterest Expense Excluding Compensation Expense Acquisition Payments NoninterestExpenseExcludingCompensationExpenseAcquisitionPayments	69800000	USD
CY2018	us-gaap	Income Loss From Continuing Operations Before Income Taxes Minority Interest And Income Loss From Equity Method Investments IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments	24075000	USD
CY2018	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	4071000	USD
CY2018	us-gaap	Net Income Loss NetIncomeLoss	20004000	USD
CY2018Q4	us-gaap	Assets Assets	1502988000	USD
CY2018Q4	us-gaap	Loans Receivable Held For Sale Net Not Part Of Disposal Group LoansReceivableHeldForSaleNetNotPartOfDisposalGroup	34710000	USD
CY2020Q4	us-gaap	Interest And Dividend Income Operating InterestAndDividendIncomeOperating	20579000	USD
CY2020Q3	us-gaap	Interest And Dividend Income Operating InterestAndDividendIncomeOperating	19794000	USD
CY2020Q2	us-gaap	Interest And Dividend Income Operating InterestAndDividendIncomeOperating	19004000	USD
CY2020Q1	us-gaap	Interest And Dividend Income Operating InterestAndDividendIncomeOperating	17339000	USD
CY2020Q4	us-gaap	Interest Expense InterestExpense	1355000	USD
CY2020Q3	us-gaap	Interest Expense InterestExpense	1500000	USD
CY2020Q2	us-gaap	Interest Expense InterestExpense	1547000	USD
CY2020Q1	us-gaap	Interest Expense InterestExpense	1649000	USD
CY2020Q4	us-gaap	Interest Income Expense Net InterestIncomeExpenseNet	19224000	USD
CY2020Q3	us-gaap	Interest Income Expense Net InterestIncomeExpenseNet	18294000	USD
CY2020Q1	us-gaap	Noninterest Income NoninterestIncome	6433000	USD
CY2020Q2	us-gaap	Interest Income Expense Net InterestIncomeExpenseNet	17457000	USD
CY2020Q1	us-gaap	Interest Income Expense Net InterestIncomeExpenseNet	15690000	USD
CY2020Q4	us-gaap	Provision For Loan And Lease Losses ProvisionForLoanAndLeaseLosses	-599000	USD
CY2020Q3	us-gaap	Provision For Loan And Lease Losses ProvisionForLoanAndLeaseLosses	567000	USD
CY2020Q2	us-gaap	Provision For Loan And Lease Losses ProvisionForLoanAndLeaseLosses	404000	USD
CY2020Q1	us-gaap	Provision For Loan And Lease Losses ProvisionForLoanAndLeaseLosses	2060000	USD
CY2020Q4	us-gaap	Noninterest Income NoninterestIncome	17732000	USD
CY2020Q3	us-gaap	Noninterest Income NoninterestIncome	21628000	USD
CY2020Q2	us-gaap	Noninterest Income NoninterestIncome	17535000	USD
CY2020Q4	nrim	Noninterest Expense Excluding Compensation Expense Acquisition Payments NoninterestExpenseExcludingCompensationExpenseAcquisitionPayments	24147000	USD
CY2020Q3	nrim	Noninterest Expense Excluding Compensation Expense Acquisition Payments NoninterestExpenseExcludingCompensationExpenseAcquisitionPayments	23506000	USD
CY2020Q2	nrim	Noninterest Expense Excluding Compensation Expense Acquisition Payments NoninterestExpenseExcludingCompensationExpenseAcquisitionPayments	22674000	USD
CY2020Q1	nrim	Noninterest Expense Excluding Compensation Expense Acquisition Payments NoninterestExpenseExcludingCompensationExpenseAcquisitionPayments	18787000	USD
CY2020Q4	us-gaap	Income Loss From Continuing Operations Before Income Taxes Minority Interest And Income Loss From Equity Method Investments IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments	13408000	USD
CY2020Q3	us-gaap	Income Loss From Continuing Operations Before Income Taxes Minority Interest And Income Loss From Equity Method Investments IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments	15849000	USD
CY2020Q3	us-gaap	Net Income Loss NetIncomeLoss	11855000	USD
CY2020Q2	us-gaap	Net Income Loss NetIncomeLoss	9900000	USD
CY2020Q2	us-gaap	Income Loss From Continuing Operations Before Income Taxes Minority Interest And Income Loss From Equity Method Investments IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments	11914000	USD
CY2020Q1	us-gaap	Income Loss From Continuing Operations Before Income Taxes Minority Interest And Income Loss From Equity Method Investments IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments	1276000	USD
CY2020Q4	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	3308000	USD
CY2020Q3	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	3994000	USD
CY2020Q2	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	2014000	USD
CY2020Q1	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	243000	USD
CY2020Q4	us-gaap	Net Income Loss NetIncomeLoss	10100000	USD
CY2020Q1	us-gaap	Net Income Loss NetIncomeLoss	1033000	USD
CY2020Q4	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	1.62
CY2020Q3	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	1.87
CY2020Q2	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	1.54
CY2020Q1	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.16
CY2020Q4	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	1.59
CY2020Q3	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	1.84
CY2020Q2	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	1.52
CY2020Q1	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.16
CY2019Q4	us-gaap	Interest And Dividend Income Operating InterestAndDividendIncomeOperating	18062000	USD
CY2019Q3	us-gaap	Interest And Dividend Income Operating InterestAndDividendIncomeOperating	17837000	USD
CY2019Q2	us-gaap	Interest And Dividend Income Operating InterestAndDividendIncomeOperating	17306000	USD
CY2019Q1	us-gaap	Interest And Dividend Income Operating InterestAndDividendIncomeOperating	16878000	USD
CY2019Q4	us-gaap	Interest Expense InterestExpense	1652000	USD
CY2019Q3	us-gaap	Interest Expense InterestExpense	1531000	USD
CY2019Q2	us-gaap	Interest Expense InterestExpense	1349000	USD
CY2019Q1	us-gaap	Interest Expense InterestExpense	1109000	USD
CY2019Q4	us-gaap	Interest Income Expense Net InterestIncomeExpenseNet	16410000	USD
CY2019Q3	us-gaap	Interest Income Expense Net InterestIncomeExpenseNet	16306000	USD
CY2019Q2	us-gaap	Interest Income Expense Net InterestIncomeExpenseNet	15957000	USD
CY2019Q1	us-gaap	Interest Income Expense Net InterestIncomeExpenseNet	15769000	USD
CY2019Q4	us-gaap	Provision For Loan And Lease Losses ProvisionForLoanAndLeaseLosses	-150000	USD
CY2019Q3	us-gaap	Provision For Loan And Lease Losses ProvisionForLoanAndLeaseLosses	-2075000	USD
CY2019Q2	us-gaap	Provision For Loan And Lease Losses ProvisionForLoanAndLeaseLosses	300000	USD
CY2019Q1	us-gaap	Provision For Loan And Lease Losses ProvisionForLoanAndLeaseLosses	750000	USD
CY2019Q4	us-gaap	Noninterest Income NoninterestIncome	9735000	USD
CY2019Q3	us-gaap	Noninterest Income NoninterestIncome	10509000	USD
CY2019Q2	us-gaap	Noninterest Income NoninterestIncome	9569000	USD
CY2019Q1	us-gaap	Noninterest Income NoninterestIncome	7533000	USD
CY2019Q4	nrim	Compensation Expense Acquisition Payments CompensationExpenseAcquisitionPayments	468000	USD
CY2019Q3	nrim	Compensation Expense Acquisition Payments CompensationExpenseAcquisitionPayments	0	USD
CY2019Q2	nrim	Compensation Expense Acquisition Payments CompensationExpenseAcquisitionPayments	0	USD
CY2019Q1	nrim	Compensation Expense Acquisition Payments CompensationExpenseAcquisitionPayments	0	USD
CY2019Q4	nrim	Noninterest Expense Excluding Compensation Expense Acquisition Payments NoninterestExpenseExcludingCompensationExpenseAcquisitionPayments	20147000	USD
CY2019Q3	nrim	Noninterest Expense Excluding Compensation Expense Acquisition Payments NoninterestExpenseExcludingCompensationExpenseAcquisitionPayments	19324000	USD
CY2019Q2	nrim	Noninterest Expense Excluding Compensation Expense Acquisition Payments NoninterestExpenseExcludingCompensationExpenseAcquisitionPayments	19819000	USD
CY2019Q1	nrim	Noninterest Expense Excluding Compensation Expense Acquisition Payments NoninterestExpenseExcludingCompensationExpenseAcquisitionPayments	17080000	USD
CY2019Q4	us-gaap	Income Loss From Continuing Operations Before Income Taxes Minority Interest And Income Loss From Equity Method Investments IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments	5680000	USD
CY2019Q3	us-gaap	Income Loss From Continuing Operations Before Income Taxes Minority Interest And Income Loss From Equity Method Investments IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments	9566000	USD
CY2019Q2	us-gaap	Income Loss From Continuing Operations Before Income Taxes Minority Interest And Income Loss From Equity Method Investments IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments	5407000	USD
CY2019Q1	us-gaap	Income Loss From Continuing Operations Before Income Taxes Minority Interest And Income Loss From Equity Method Investments IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments	5472000	USD
CY2019Q4	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	1100000	USD
CY2019Q3	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	2028000	USD
CY2019Q2	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	1146000	USD
CY2019Q1	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	1160000	USD
CY2019Q4	us-gaap	Net Income Loss NetIncomeLoss	4580000	USD
CY2019Q3	us-gaap	Net Income Loss NetIncomeLoss	7538000	USD
CY2019Q2	us-gaap	Net Income Loss NetIncomeLoss	4261000	USD
CY2019Q1	us-gaap	Net Income Loss NetIncomeLoss	4312000	USD
CY2019Q4	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.70
CY2019Q3	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	1.13
CY2019Q2	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.62
CY2019Q1	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.63
CY2019Q4	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.69
CY2019Q3	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	1.11
CY2019Q2	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.62
CY2019Q1	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.62
CY2018Q4	us-gaap	Interest And Dividend Income Operating InterestAndDividendIncomeOperating	17207000	USD
CY2018Q3	us-gaap	Interest And Dividend Income Operating InterestAndDividendIncomeOperating	16580000	USD
CY2018Q2	us-gaap	Interest And Dividend Income Operating InterestAndDividendIncomeOperating	15595000	USD
CY2018Q1	us-gaap	Interest And Dividend Income Operating InterestAndDividendIncomeOperating	14795000	USD
CY2018Q4	us-gaap	Interest Expense InterestExpense	1070000	USD
CY2018Q3	us-gaap	Interest Expense InterestExpense	761000	USD
CY2018Q2	us-gaap	Interest Expense InterestExpense	606000	USD
CY2018Q1	us-gaap	Interest Expense InterestExpense	532000	USD
CY2018Q4	us-gaap	Interest Income Expense Net InterestIncomeExpenseNet	16137000	USD
CY2018Q3	us-gaap	Interest Income Expense Net InterestIncomeExpenseNet	15819000	USD
CY2018Q2	us-gaap	Interest Income Expense Net InterestIncomeExpenseNet	14989000	USD
CY2018Q1	us-gaap	Interest Income Expense Net InterestIncomeExpenseNet	14263000	USD
CY2018Q4	us-gaap	Provision For Loan And Lease Losses ProvisionForLoanAndLeaseLosses	-200000	USD
CY2018Q3	us-gaap	Provision For Loan And Lease Losses ProvisionForLoanAndLeaseLosses	0	USD
CY2018Q2	us-gaap	Provision For Loan And Lease Losses ProvisionForLoanAndLeaseLosses	-300000	USD
CY2018Q1	us-gaap	Provision For Loan And Lease Losses ProvisionForLoanAndLeaseLosses	0	USD
CY2018Q4	us-gaap	Noninterest Income NoninterestIncome	7718000	USD
CY2018Q3	us-gaap	Noninterest Income NoninterestIncome	8673000	USD
CY2018Q2	us-gaap	Noninterest Income NoninterestIncome	8314000	USD
CY2018Q1	us-gaap	Noninterest Income NoninterestIncome	7462000	USD
CY2018Q4	nrim	Noninterest Expense Excluding Compensation Expense Acquisition Payments NoninterestExpenseExcludingCompensationExpenseAcquisitionPayments	18300000	USD
CY2018Q3	nrim	Noninterest Expense Excluding Compensation Expense Acquisition Payments NoninterestExpenseExcludingCompensationExpenseAcquisitionPayments	18099000	USD
CY2018Q2	nrim	Noninterest Expense Excluding Compensation Expense Acquisition Payments NoninterestExpenseExcludingCompensationExpenseAcquisitionPayments	16606000	USD
CY2018Q1	nrim	Noninterest Expense Excluding Compensation Expense Acquisition Payments NoninterestExpenseExcludingCompensationExpenseAcquisitionPayments	16795000	USD
CY2018Q4	us-gaap	Income Loss From Continuing Operations Before Income Taxes Minority Interest And Income Loss From Equity Method Investments IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments	5755000	USD
CY2018Q3	us-gaap	Income Loss From Continuing Operations Before Income Taxes Minority Interest And Income Loss From Equity Method Investments IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments	6393000	USD
CY2018Q2	us-gaap	Income Loss From Continuing Operations Before Income Taxes Minority Interest And Income Loss From Equity Method Investments IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments	6997000	USD
CY2018Q1	us-gaap	Income Loss From Continuing Operations Before Income Taxes Minority Interest And Income Loss From Equity Method Investments IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments	4930000	USD
CY2018Q4	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	907000	USD
CY2018Q3	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	1129000	USD
CY2018Q2	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	1167000	USD
CY2018Q1	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	868000	USD
CY2018Q4	us-gaap	Net Income Loss NetIncomeLoss	4848000	USD
CY2018Q3	us-gaap	Net Income Loss NetIncomeLoss	5264000	USD
CY2018Q2	us-gaap	Net Income Loss NetIncomeLoss	5830000	USD
CY2018Q1	us-gaap	Net Income Loss NetIncomeLoss	4062000	USD
CY2018Q4	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.70
CY2018Q3	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.77
CY2018Q2	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.85
CY2018Q1	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.59
CY2018Q4	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.69
CY2018Q3	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.75
CY2018Q2	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.84
CY2018Q1	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.58

Files In Submission

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2020 Q4 Form 10-K Financial Statement

#000116337021000012 Filed on March 05, 2021

Income Statement

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$NRIM NORTHRIM BANCORP INC Stock $nrim

2020 Q4 Form 10-K Financial Statement

#000116337021000012 Filed on March 05, 2021

Income Statement

Balance Sheet

Cashflow Statement

Facts In Submission

Files In Submission

$NRIM
NORTHRIM BANCORP INC Stock $nrim