Cover - shares	6 Months Ended
	Jun. 30, 2022	Aug. 05, 2022
Cover [Abstract]
Document Type	10-Q
Document Quarterly Report	true
Document Period End Date	Jun. 30, 2022
Document Transition Report	false
Entity File Number	000-33501
Entity Registrant Name	NORTHRIM BANCORP, INC.
Entity Incorporation, State or Country Code	AK
Entity Tax Identification Number	92-0175752
Entity Address, Address Line One	3111 C Street
Entity Address, City or Town	Anchorage
Entity Address, State or Province	AK
Entity Address, Postal Zip Code	99503
City Area Code	907
Local Phone Number	562-0062
Entity Current Reporting Status	Yes
Entity Interactive Data Current	Yes
Entity Filer Category	Accelerated Filer
Entity Small Business	false
Entity Emerging Growth Company	false
Entity Shell Company	false
Entity Common Stock, Shares Outstanding		5,681,089
Amendment Flag	false
Entity Central Index Key	0001163370
Current Fiscal Year End Date	--12-31
Document Fiscal Year Focus	2022
Document Fiscal Period Focus	Q2