XML 59 R45.htm IDEA: XBRL DOCUMENT
v3.22.0.1

Other Real Estate Owned (Tables) | 12 Months Ended
--- | ---
Dec. 31, 2021
Real Estate [Abstract] |
Net Operating (Income) Expense Related To Other Real Estate Owned | The following table details net operating (income) expense related to OREO for the years indicated:
| Years Ended December 31,
(In Thousands) | 2021 | 2020 | 2019
OREO (income) expense, net rental income and gains on sale: |  |  |
OREO operating expense | $777 |  | $658 |  | $693 |
Rental income on OREO | (524) |  | (509) |  | (506) |
Gains on sale of OREO | (685) |  | (391) |  | (380) |
Total | ($432) |  | ($242) |  | ($193) |

X
- Definition Net Operating Expense Related To Other Real Estate Owned [Table Text Block] + References No definition available. + Details
Name: | nrim_NetOperatingExpenseRelatedToOtherRealEstateOwnedTableTextBlock
Namespace Prefix: | nrim_
Data Type: | dtr-types:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- References No definition available. + Details
Name: | us-gaap_RealEstateAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration