Consolidated Statements of Comprehensive Income - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Statement of Comprehensive Income [Abstract]
Net income	$ 14,990	$ 18,334	$ 17,867
Other comprehensive income (loss), net of tax:
Unrealized holding gains (losses) arising during the period	42	(795)	(237)
Reclassification of net (gains) losses included in net income (net of tax (expense) benefit ($5), $111, and $190 in 2016, 2015 and 2014, respectively)	6	(160)	(271)
Income tax (expense) benefit related to unrealized gains and losses	(33)	296	86
Other comprehensive income (loss), net of tax	15	(659)	(422)
Comprehensive income	15,005	17,675	17,445
Less: comprehensive income attributable to the noncontrolling interest	579	551	459
Comprehensive income attributable to Northrim BanCorp, Inc.	$ 14,426	$ 17,124	$ 16,986