Consolidated Statements Of Income (USD $) In Thousands, except Share data, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2012	Jun. 30, 2011	Jun. 30, 2012	Jun. 30, 2011
Interest Income
Interest and fees on loans	$ 10,305	$ 10,709	$ 20,530	$ 21,396
Interest on investment securities-available for sale	718	663	1,467	1,534
Interest on investment securities-held to maturity	37	59	75	120
Interest on deposits in other banks	63	55	103	88
Total Interest Income	11,123	11,486	22,175	23,138
Interest Expense
Interest expense on deposits, borrowings and junior subordinated debentures	627	904	1,325	1,881
Net Interest Income	10,496	10,582	20,850	21,257
Provision for loan losses	89	550	178	1,099
Net Interest Income After Provision for Loan Losses	10,407	10,032	20,672	20,158
Other Operating Income
Purchased receivable income	712	565	1,424	1,191
Employee benefit plan income	616	593	1,156	1,093
Service charges on deposit accounts	569	594	1,137	1,118
Electronic banking income	493	467	976	916
Rental income	204	191	402	387
Gain on sale of securities	246		273	263
Other income	480	390	858	662
Total Other Operating Income	3,725	3,070	6,932	5,848
Other Operating Expense
Salaries and other personnel expense	5,154	5,200	10,860	10,516
Occupancy	920	997	1,916	1,907
Marketing expense	435	443	872	880
Equipment expense	342	292	636	596
Insurance expense	301	295	419	731
Professional and outside services	287	304	676	617
Software expense	270	277	521	517
Amortization of low income housing tax investments	234	235	462	451
Internet banking expense	185	158	357	311
OREO (income) expense, net of rental income and gains on sale	118	(742)	215	(881)
Intangible asset amortization expense	65	71	129	141
Other operating expense	984	1,059	1,990	2,129
Total Other Operating Expense	9,295	8,589	19,053	17,915
Income Before Provision for Income Taxes	4,837	4,513	8,551	8,091
Provision for income taxes	1,551	1,198	2,577	2,232
Net Income	3,286	3,315	5,974	5,859
Less: Net income attributable to the noncontrolling interest	144	133	256	222
Net Income Attributable to Northrim BanCorp	3,142	3,182	5,718	5,637
Earnings Per Share, Basic	$ 0.49	$ 0.49	$ 0.88	$ 0.88
Earnings Per Share, Diluted	$ 0.48	$ 0.49	$ 0.87	$ 0.86
Weighted Average Shares Outstanding, Basic	6,469,909	6,431,060	6,468,724	6,429,895
Weighted Average Shares Outstanding, Diluted	6,573,729	6,549,744	6,570,094	6,548,557
RML [Member]
Other Operating Income
Equity in earnings from RML	$ 405	$ 270	$ 706	$ 218