Regulatory Matters (Tables)

12 Months Ended

Dec. 31, 2025

Broker-Dealer, Net Capital Requirement, SEC Regulation [Abstract]

Capital Requirements And Actual Capital Ratios

The tables below illustrate the capital requirements for the Company and the Bank and the actual capital ratios for each entity that exceed these requirements.  The dividends that the Bank pays to the Company are limited to the extent necessary for the Bank to meet the regulatory requirements of a “well-capitalized” bank. Some capital ratios for the Company exceed those for the Bank primarily because the $10 million trust preferred securities offerings that the Company completed in the fourth quarter of 2005 and the $60 million in Subordinated Notes completed in the fourth quarter of 2025 are included in the Company’s capital for regulatory purposes although they are accounted for as a liability in its financial statements. The trust preferred securities and Subordinated Notes are not included in the Bank's capital ratios.  

Northrim BanCorp, Inc.	Actual			Adequately-Capitalized			Well-Capitalized
(In Thousands)	Amount	Ratio		Amount	Ratio		Amount	Ratio
As of December 31, 2025:
Common equity tier 1 capital (to risk-weighted assets)	$275,363	10.38	%	$119,377	≥ 4.5	%	NA	NA
Total Capital (to risk-weighted assets)	$370,333	13.95	%	$212,377	≥ 8	%	NA	NA
Tier I Capital (to risk-weighted assets)	$285,173	10.75	%	$159,166	≥ 6	%	NA	NA
Tier I Capital (to average assets)	$285,173	8.77	%	$130,068	≥ 4	%	NA	NA
As of December 31, 2024:
Common equity tier 1 capital (to risk-weighted assets)	$223,362	9.36	%	$107,386	≥ 4.5	%	NA	NA
Total Capital (to risk-weighted assets)	$261,059	10.94	%	$190,902	≥ 8	%	NA	NA
Tier I Capital (to risk-weighted assets)	$233,080	9.76	%	$143,287	≥ 6	%	NA	NA
Tier I Capital (to average assets)	$233,080	7.68	%	$121,396	≥ 4	%	NA	NA
Northrim Bank	Actual			Adequately-Capitalized			Well-Capitalized
(In Thousands)	Amount	Ratio		Amount	Ratio		Amount	Ratio
As of December 31, 2025:
Common equity tier 1 capital (to risk-weighted assets)	$311,964	11.84	%	$118,567	≥ 4.5	%	$171,264	≥ 6.5	%
Total Capital (to risk-weighted assets)	$337,124	12.79	%	$210,867	≥ 8	%	$263,584	≥ 10	%
Tier I Capital (to risk-weighted assets)	$311,964	11.84	%	$158,090	≥ 6	%	$210,786	≥ 8	%
Tier I Capital (to average assets)	$311,964	9.61	%	$129,850	≥ 4	%	$162,312	≥ 5	%
As of December 31, 2024:
Common equity tier 1 capital (to risk-weighted assets)	$218,664	9.20	%	$106,955	≥ 4.5	%	$154,491	≥ 6.5	%
Total Capital (to risk-weighted assets)	$246,643	10.37	%	$190,274	≥ 8	%	$237,843	≥ 10	%
Tier I Capital (to risk-weighted assets)	$218,664	9.20	%	$142,607	≥ 6	%	$190,143	≥ 8	%
Tier I Capital (to average assets)	$218,664	7.24	%	$120,809	≥ 4	%	$151,011	≥ 5	%