Consolidated Statements Of Comprehensive Income - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2016	Mar. 31, 2015
Statement of Comprehensive Income [Abstract]
Net income	$ 3,506	$ 3,633
Other comprehensive income, net of tax:
Unrealized gains arising during the period	1,326	888
Reclassification of net gains included in net income (net of tax expense of ($9) and $47 for the first quarter of 2016 and 2015, respectively)	14	(67)
Income tax expense related to unrealized gains and losses	(470)	(321)
Other comprehensive income	870	500
Comprehensive income	4,376	4,133
Less: comprehensive income attributable to the noncontrolling interest	130	72
Comprehensive income attributable to Northrim BanCorp, Inc.	$ 4,246	$ 4,061