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Summary of Significant Accounting Policies (Tables)
 12 Months Ended
Dec. 31, 2019
New Accounting Pronouncements and Changes in Accounting Principles [Abstract]  
Calculation of Earnings Per Share
Information used to calculate earnings per share was as follows:
(In Thousands)
2019
2018
2017
Net income attributable to Northrim BanCorp, Inc.

$20,691


$20,004


$13,151

Basic weighted average common shares outstanding
6,709

6,878

6,890

Dilutive effect of potential common shares from awards granted under equity incentive program
99

104

88

Total
6,808

6,982

6,978

Earnings per common share
 
 
 
Basic

$3.08


$2.91


$1.91

Diluted

$3.04


$2.86


$1.88