Consolidated Statements Of Comprehensive Income (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2015	Mar. 31, 2014
Statement of Comprehensive Income [Abstract]
Net income	$ 3,633	$ 2,703
Other comprehensive income, net of tax:
Unrealized gains arising during the period	888	95
Reclassification of net gains included in net income (net of tax expense $47 and $40 for the first three months of 2015 and 2014, respectively)	(67)	(57)
Income tax expense related to unrealized gains	(321)	(39)
Other comprehensive income (loss)	500	(1)
Comprehensive income	4,133	2,702
Less: comprehensive income attributable to the noncontrolling interest	72	45
Comprehensive income attributable to Northrim BanCorp	$ 4,061	$ 2,657