Consolidated Statements of Income - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Interest Income
Interest and fees on loans and loans held for sale	$ 14,992	$ 14,341	$ 42,291	$ 41,180
Interest on investment securities available for sale	1,314	956	3,870	3,158
Dividends on marketable equity securities	86	87	252	259
Interest on investment securities held to maturity	0	11	0	31
Dividends on Federal Home Loan Bank stock	19	6	45	18
Interest on deposits in other banks	169	118	512	230
Total Interest Income	16,580	15,519	46,970	44,876
Interest Expense
Interest expense on deposits	595	429	1,413	1,325
Interest expense on securities sold under agreements to repurchase	9	9	26	25
Interest expense on borrowings	59	54	174	130
Interest expense on junior subordinated debentures	98	110	286	402
Total Interest Expense	761	602	1,899	1,882
Net Interest Income	15,819	14,917	45,071	42,994
(Benefit) provision for loan losses	0	2,500	(300)	3,200
Net Interest Income After Provision for Loan Losses	15,819	12,417	45,371	39,794
Other Operating Income
Revenue from contracts with customers	1,536	1,441	4,397	4,251
Purchased receivable income	767	752	2,474	2,217
Gain on sale of Northrim Benefits Group	0	4,443	0	4,443
Employee benefit plan income	0	609	0	2,506
Gain (loss) on sale of securities, net	0	(3)	0	11
Other income	872	765	2,457	2,168
Total Other Operating Income	8,673	13,855	24,449	32,522
Other Operating Expense
Salaries and other personnel expense	11,261	11,115	33,208	33,750
Occupancy expense	1,687	1,706	4,407	4,991
Data processing expense	1,503	1,509	4,374	4,209
Impairment of equity method investment	804	0	804	0
Professional and outside services	727	674	1,780	1,908
Marketing expense	367	332	1,461	1,733
Insurance expense	171	475	645	922
OREO expense, net rental income and gains on sale	43	(44)	157	216
Intangible asset amortization expense	18	26	53	79
Compensation expense - RML acquisition payments	0	149	0	323
Other operating expense	1,518	1,749	4,611	4,685
Total Other Operating Expense	18,099	17,691	51,500	52,816
Income Before Provision for Income Taxes	6,393	8,581	18,320	19,500
Provision for income taxes	1,129	2,980	3,164	6,236
Net Income	5,264	5,601	15,156	13,264
Less: Net income attributable to the noncontrolling interest	0	78	0	327
Net Income Attributable to Northrim BanCorp, Inc.	$ 5,264	$ 5,523	$ 15,156	$ 12,937
Earnings Per Share, Basic (in USD per share)	$ 0.77	$ 0.80	$ 2.21	$ 1.88
Earnings Per Share, Diluted (in USD per share)	$ 0.75	$ 0.79	$ 2.17	$ 1.85
Weighted Average Shares Outstanding, Basic (in shares)	6,877,194	6,872,273	6,873,843	6,897,577
Weighted Average Shares Outstanding, Diluted (in shares)	6,990,633	6,959,035	6,978,679	6,983,778
Mortgage banking income
Other Operating Income
Revenue from contracts with customers	$ 5,903	$ 6,219	$ 16,325	$ 18,020
Bankcard fees
Other Operating Income
Revenue from contracts with customers	724	664	2,056	1,903
Service charges on deposit accounts
Other Operating Income
Revenue from contracts with customers	$ 407	$ 406	$ 1,137	$ 1,254