XML 57 R43.htm IDEA: XBRL DOCUMENT
v3.22.0.1

Purchased Receivables (Tables) | 12 Months Ended
--- | ---
Dec. 31, 2021
Purchased Receivables [Abstract] |
Summary of Components of Net Purchased Receivables | The following table summarizes the components of net purchased receivables at December 31, for the years indicated:
(In Thousands) | 2021 |  | 2020
Purchased receivables | $6,987 |  |  | $13,995 |
Allowance for credit losses - purchased receivables | — |  |  | (73) |
Total | $6,987 |  |  | $13,922 |
Changes in the ACL on Purchased Receivables | The following table sets forth information regarding changes in the ACL on purchased receivables for the periods indicated:
(In Thousands) | 2021 | 2020 | 2019
Balance at beginning of year | $73 |  | $94 |  | $190 |
Impact of adopting ASC 326 | (73) |  | — |  | — |
Charge-offs | — |  | — |  | — |
Recoveries | — |  | — |  | — |
Charge-offs net of recoveries | — |  | — |  | — |
Benefit for purchased receivables | — |  | (21) |  | (96) |
Balance at end of year | $— |  | $73 |  | $94 |

X
- Definition Purchased Receivables [Abstract] + References No definition available. + Details
Name: | nrim_PurchasedReceivablesAbstract
Namespace Prefix: | nrim_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Summary Of Components Of Net Purchased Receivables [Table Text Block] + References No definition available. + Details
Name: | nrim_SummaryOfComponentsOfNetPurchasedReceivablesTableTextBlock
Namespace Prefix: | nrim_
Data Type: | dtr-types:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- Definition Tabular disclosure of allowance for credit loss on accounts receivable. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 326 -SubTopic 20 -Section 50 -Paragraph 13 -URI http://asc.fasb.org/extlink&oid=124255953&loc=SL82919249-210447 + Details
Name: | us-gaap_AccountsReceivableAllowanceForCreditLossTableTextBlock
Namespace Prefix: | us-gaap_
Data Type: | dtr-types:textBlockItemType
Balance Type: | na
Period Type: | duration