Consolidated Statements of Comprehensive Income - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2016	Jun. 30, 2015
Statement of Comprehensive Income [Abstract]
Net income	$ 4,506	$ 4,943	$ 8,012	$ 8,576
Other comprehensive income (loss), net of tax:
Unrealized gains (losses) arising during the period	466	(152)	1,792	736
Reclassification of net (gains) losses included in net income (net of tax (benefit) expense of $5 and $7 for the second quarter of 2016 and 2015, respectively and ($5) and $53 for the six months ended June 30, 2016 and 2015, respectively)	(7)	(9)	6	(77)
Income tax expense (benefit) related to unrealized gains and losses	(174)	58	(644)	(263)
Other comprehensive income (loss), net of tax	285	(103)	1,154	396
Comprehensive income	4,791	4,840	9,166	8,972
Less: comprehensive income attributable to the noncontrolling interest	156	162	286	234
Comprehensive income attributable to Northrim BanCorp, Inc.	$ 4,635	$ 4,678	$ 8,880	$ 8,738