Consolidated Statements Of Comprehensive Income (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2013	Mar. 31, 2012
Consolidated Statements Of Comprehensive Income [Abstract]
Net income	$ 2,764	$ 2,688
Other comprehensive income, net of tax:
Unrealized gains (losses) arising during the period	151	1,525
Reclassification of net gains included in net income (net of tax expense $90,000 and $9,000 in 2013 and 2012, respectively)	(128)	(16)
Income tax benefit (expense) related to unrealized (losses) gains	(63)	(627)
Total other comprehensive income (loss)	(40)	882
Comprehensive income	2,724	3,570
Less: comprehensive income attributable to the noncontrolling interest	90	112
Total comprehensive income attributable to Northrim BanCorp	$ 2,634	$ 3,458