Earnings Per Share (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended				6 Months Ended
	Jun. 30, 2022	Mar. 31, 2022	Jun. 30, 2021	Mar. 31, 2021	Jun. 30, 2022	Jun. 30, 2021
Reconciliation of factors used in computing basic and diluted earnings per common share
Net income	$ 14,821	$ 12,866	$ 8,813	$ 11,204	$ 27,687	$ 20,017
Weighted average common shares outstanding for basic earnings per common share (in shares)	60,542,170		60,089,327		60,468,027	60,008,071
Dilutive potential common shares	426,984		640,814		477,684	564,386
Shares used in computing diluted earnings per common share (in shares)	60,969,154		60,730,141		60,945,711	60,572,457
Basic earnings per share (in dollars per share)	$ 0.24		$ 0.15		$ 0.46	$ 0.33
Diluted earnings per share (in dollars per share)	$ 0.24		$ 0.15		$ 0.45	$ 0.33
Number of shares not in computing diluted earnings per common share	1,389,250		1,057,945		1,389,250	1,072,945