Consolidated Statements Of Income (USD $) In Thousands, except Share data, unless otherwise specified	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Interest Income
Interest and fees on loans	$ 41,515	$ 42,391	$ 44,926
Interest on investment securities-available for sale	2,796	3,097	4,316
Interest on investment securities-held to maturity	139	212	278
Interest on deposits in other banks	278	208	178
Total Interest Income	44,728	45,908	49,698
Interest Expense
Interest expense on deposits, borrowings and junior subordinated debentures	2,505	3,544	5,485
Net Interest Income	42,223	42,364	44,213
Provision (benefit) for loan losses	(1,559)	1,999	5,583
Net Interest Income After Provision (Benefit) for Loan Losses	43,782	40,365	38,630
Other Operating Income
Purchased receivable income	3,026	2,703	1,839
Equity in earnings from RML	2,635	1,201	1,401
Employee benefit plan income	2,369	2,167	1,900
Service charges on deposit accounts	2,201	2,296	2,636
Electronic banking income	2,058	1,945	1,758
Rental income	773	776	810
Gain on sale of securities	336	419	649
Other income	2,034	1,583	1,384
Total Other Operating Income	15,432	13,090	12,377
Other Operating Expense
Salaries and other personnel expense	22,032	21,006	21,637
Occupancy	3,615	3,764	3,704
Marketing expense	1,975	1,771	1,782
Professional and outside services	1,479	1,386	1,315
Equipment expense	1,205	1,200	1,116
Software expense	1,111	1,005	920
OREO (income) expense, net of rental income and gains on sale	1,089	(710)	(1,145)
Amortization of low income housing tax investments	921	902	869
Insurance expense	913	1,333	1,902
Internet banking expense	701	648	622
Reserve for purchased receivables	357
Intangible asset amortization expense	252	275	299
Other operating expense	3,950	4,175	4,603
Total Other Operating Expense	39,600	36,755	37,624
Income Before Provision for Income Taxes	19,614	16,700	13,383
Provision for income taxes	6,156	4,873	3,918
Net Income	13,458	11,827	9,465
Less: Net income attributable to the noncontrolling interest	512	429	399
Net Income Attributable to Northrim BanCorp	$ 12,946	$ 11,398	$ 9,066
Earnings Per Share, Basic	$ 2.00	$ 1.77	$ 1.42
Earnings Per Share, Diluted	$ 1.97	$ 1.74	$ 1.40
Weighted Average Shares Outstanding, Basic	6,477,266	6,438,625	6,398,329
Weighted Average Shares Outstanding, Diluted	6,574,993	6,554,761	6,480,905