Consolidated Statements of Income - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017
Interest Income
Interest and fees on loans and loans held for sale	$ 14,036	$ 13,601	$ 27,299	$ 26,839
Interest on investment securities available for sale	1,302	1,124	2,556	2,202
Dividends on marketable equity securities	84	86	166	172
Interest on investment securities held to maturity	0	11	0	21
Dividends on Federal Home Loan Bank stock	14	6	26	11
Interest on deposits in other banks	159	64	343	112
Total Interest Income	15,595	14,892	30,390	29,357
Interest Expense
Interest expense on deposits	446	451	818	896
Interest expense on securities sold under agreements to repurchase	8	8	17	16
Interest expense on borrowings	57	39	115	77
Interest expense on junior subordinated debentures	95	150	188	291
Total Interest Expense	606	648	1,138	1,280
Net Interest Income	14,989	14,244	29,252	28,077
(Benefit) provision for loan losses	(300)	300	(300)	700
Net Interest Income After Provision for Loan Losses	15,289	13,944	29,552	27,377
Other Operating Income
Revenue from contracts with customers	1,519	1,415	2,861	2,810
Purchased receivable income	867	776	1,707	1,465
Gain on sale of securities, net	0	0	0	14
Employee benefit plan income	0	961	0	1,897
Other income	886	607	1,585	1,403
Total Other Operating Income	8,314	9,762	15,776	18,667
Other Operating Expense
Salaries and other personnel expense	11,362	11,793	21,947	22,635
Data processing expense	1,323	1,453	2,871	2,700
Occupancy expense	1,020	1,664	2,720	3,285
Professional and outside services	554	612	1,053	1,234
Marketing expense	462	891	1,094	1,401
Insurance expense	178	194	474	447
Intangible asset amortization expense	17	27	35	53
OREO expense, net rental income and gains on sale	11	83	114	260
Compensation expense - RML acquisition payments	0	0	0	174
Other operating expense	1,679	1,793	3,093	2,936
Total Other Operating Expense	16,606	18,510	33,401	35,125
Income Before Provision for Income Taxes	6,997	5,196	11,927	10,919
Provision for income taxes	1,167	1,455	2,035	3,256
Net Income	5,830	3,741	9,892	7,663
Less: Net income attributable to the noncontrolling interest	0	152	0	249
Net Income Attributable to Northrim BanCorp, Inc.	$ 5,830	$ 3,589	$ 9,892	$ 7,414
Earnings Per Share, Basic (in USD per share)	$ 0.85	$ 0.52	$ 1.44	$ 1.07
Earnings Per Share, Diluted (in USD per share)	$ 0.84	$ 0.51	$ 1.42	$ 1.06
Weighted Average Shares Outstanding, Basic (in shares)	6,872,371	6,910,679	6,872,167	6,910,230
Weighted Average Shares Outstanding, Diluted (in shares)	6,976,985	6,997,727	6,972,744	6,996,160
Mortgage banking income
Other Operating Income
Revenue from contracts with customers	$ 5,478	$ 6,351	$ 10,422	$ 11,801
Bankcard fees
Other Operating Income
Revenue from contracts with customers	707	658	1,332	1,239
Service charges on deposit accounts
Other Operating Income
Revenue from contracts with customers	$ 376	$ 409	$ 730	$ 848