XML 60 R49.htm IDEA: XBRL DOCUMENT
v3.20.2

Allowance for Loan Losses - Recorded Investment Segregated by Amounts Individually or Collectively in Allowance for Loan Losses (Details) - USD ($) $ in Thousands | Sep. 30, 2020 | Dec. 31, 2019
--- | --- | ---
Financing Receivable, Allowance for Credit Loss [Line Items] |  |
Loans | $ 1,492,720 | $ 1,043,371
Balance, end of period: Individually evaluated for impairment | 19,946 | 24,673
Balance, end of period: Collectively evaluated for impairment | 1,472,774 | 1,018,698
Commercial |  |
Financing Receivable, Allowance for Credit Loss [Line Items] |  |
Loans | 825,702 | 411,327
Balance, end of period: Individually evaluated for impairment | 9,178 | 16,077
Balance, end of period: Collectively evaluated for impairment | 816,524 | 395,250
Real estate construction one-to-four family |  |
Financing Receivable, Allowance for Credit Loss [Line Items] |  |
Loans | 37,751 | 38,503
Balance, end of period: Individually evaluated for impairment | 701 | 1,349
Balance, end of period: Collectively evaluated for impairment | 37,050 | 37,154
Real estate construction other |  |
Financing Receivable, Allowance for Credit Loss [Line Items] |  |
Loans | 81,772 | 60,906
Balance, end of period: Individually evaluated for impairment | 0 | 0
Balance, end of period: Collectively evaluated for impairment | 81,772 | 60,906
Real estate term owner occupied |  |
Financing Receivable, Allowance for Credit Loss [Line Items] |  |
Loans | 148,167 | 138,181
Balance, end of period: Individually evaluated for impairment | 7,430 | 5,104
Balance, end of period: Collectively evaluated for impairment | 140,737 | 133,077
Real estate term non-owner occupied |  |
Financing Receivable, Allowance for Credit Loss [Line Items] |  |
Loans | 318,738 | 311,302
Balance, end of period: Individually evaluated for impairment | 790 | 178
Balance, end of period: Collectively evaluated for impairment | 317,948 | 311,124
Real estate term other |  |
Financing Receivable, Allowance for Credit Loss [Line Items] |  |
Loans | 43,245 | 42,200
Balance, end of period: Individually evaluated for impairment | 1,499 | 1,594
Balance, end of period: Collectively evaluated for impairment | 41,746 | 40,606
Consumer secured by 1st deeds of trust |  |
Financing Receivable, Allowance for Credit Loss [Line Items] |  |
Loans | 14,037 | 16,191
Balance, end of period: Individually evaluated for impairment | 264 | 281
Balance, end of period: Collectively evaluated for impairment | 13,773 | 15,910
Consumer other |  |
Financing Receivable, Allowance for Credit Loss [Line Items] |  |
Loans | 23,308 | 24,761
Balance, end of period: Individually evaluated for impairment | 84 | 90
Balance, end of period: Collectively evaluated for impairment | $ 23,224 | $ 24,671

X
- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References No definition available. + Details
Name: | us-gaap_FinancingReceivableAllowanceForCreditLossesLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition The balance of financing receivables that were collectively evaluated for impairment. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 11B -Subparagraph (h) -URI http://asc.fasb.org/extlink&oid=121611835&loc=SL6953423-111524 + Details
Name: | us-gaap_FinancingReceivableCollectivelyEvaluatedForImpairment
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition The balance of financing receivables that were individually evaluated for impairment. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 11B -Subparagraph (h) -URI http://asc.fasb.org/extlink&oid=121611835&loc=SL6953423-111524 + Details
Name: | us-gaap_FinancingReceivableIndividuallyEvaluatedForImpairment
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Amount before allowance and after deduction of deferred interest and fees, unamortized costs and premiums and discounts from face amounts, of loans and leases held in portfolio, including but not limited to, commercial and consumer loans. Excludes loans and leases covered under loss sharing agreements. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 45 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=121593590&loc=d3e4428-111522 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 4 -URI http://asc.fasb.org/extlink&oid=121611835&loc=d3e5074-111524 + Details
Name: | us-gaap_LoansAndLeasesReceivableNetOfDeferredIncome
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Details
Name: | us-gaap_FinancingReceivablePortfolioSegmentAxis=us-gaap_CommercialPortfolioSegmentMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FinancingReceivablePortfolioSegmentAxis=nrim_RealEstateConstructionOneToFourFamilyPortfolioSegmentMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FinancingReceivablePortfolioSegmentAxis=nrim_RealEstateConstructionOtherPortfolioSegmentMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FinancingReceivablePortfolioSegmentAxis=nrim_RealEstateTermOwnerOccupiedPortfolioSegmentMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FinancingReceivablePortfolioSegmentAxis=nrim_RealEstateTermNonOwnerOccupiedPortfolioSegmentMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FinancingReceivablePortfolioSegmentAxis=nrim_RealEstateTermOtherPortfolioSegmentMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FinancingReceivablePortfolioSegmentAxis=nrim_ConsumerSecuredByFirstDeedOfTrustPortfolioSegmentMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FinancingReceivablePortfolioSegmentAxis=nrim_ConsumerOtherPortfolioSegmentMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |