Consolidated Statements of Income - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
Interest Income
Interest and fees on loans and loans held for sale	$ 13,263	$ 13,238
Interest on investment securities available for sale	1,254	1,078
Dividends on marketable securities	82	86
Interest on investment securities held to maturity	12	15
Interest on deposits in other banks	184	48
Total Interest Income	14,795	14,465
Interest Expense
Interest expense on deposits	372	445
Interest expense on securities sold under agreements to repurchase	9	8
Interest expense on borrowings	58	38
Interest expense on junior subordinated debentures	93	141
Total Interest Expense	532	632
Net Interest Income	14,263	13,833
Provision for loan losses	0	400
Net Interest Income After Provision for Loan Losses	14,263	13,433
Other Operating Income
Mortgage banking income	4,944	5,450
Employee benefit plan income	0	936
Purchased receivable income	840	689
Bankcard fees	625	581
Service charges on deposit accounts	354	439
Gain on sale of securities, net	0	14
Other income	699	796
Total Other Operating Income	7,462	8,905
Other Operating Expense
Salaries and other personnel expense	10,585	10,842
Occupancy expense	1,700	1,621
Data processing expense	1,548	1,247
Marketing expense	632	510
Professional and outside services	499	622
Insurance expense	296	253
OREO expense, net rental income and gains on sale	103	177
Intangible asset amortization expense	18	26
Compensation expense - RML acquisition payments	0	174
Other operating expense	1,414	1,143
Total Other Operating Expense	16,795	16,615
Income Before Provision for Income Taxes	4,930	5,723
Provision for income taxes	868	1,801
Net Income	4,062	3,922
Less: Net income attributable to the noncontrolling interest	0	97
Net Income Attributable to Northrim BanCorp, Inc.	$ 4,062	$ 3,825
Earnings Per Share, Basic (in USD per share)	$ 0.59	$ 0.55
Earnings Per Share, Diluted (in USD per share)	$ 0.58	$ 0.55
Weighted Average Shares Outstanding, Basic (in shares)	6,871,963	6,909,780
Weighted Average Shares Outstanding, Diluted (in shares)	6,968,082	6,993,726