Earnings Per Common Share - Schedule of computation of earnings per common share (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021
Net income per share calculations for basic and diluted methods
Net income	$ 35,661	$ 25,941	$ 93,924	$ 93,523
Weighted Average Shares Outstanding
Weighted average number of common shares outstanding, basic (in shares)	55,349,547	56,227,816	55,399,424	55,256,348
Weighted average number of common shares outstanding, diluted (in shares)	56,073,164	56,832,518	56,123,756	55,872,835
Basic earnings per common share (in dollars per share)	$ 0.64	$ 0.46	$ 1.70	$ 1.69
Diluted earnings per common share (in dollars per share)	$ 0.64	$ 0.46	$ 1.67	$ 1.67
Options
Weighted Average Shares Outstanding
Dilutive effect of common stock equivalents (in shares)	249	122	1,606	1,009
Warrants
Weighted Average Shares Outstanding
Dilutive effect of common stock equivalents (in shares)	1,708	1,704	1,749	1,732
RSU Awards
Weighted Average Shares Outstanding
Dilutive effect of common stock equivalents (in shares)	624,576	577,611	661,173	602,311
PSU Awards
Weighted Average Shares Outstanding
Dilutive effect of common stock equivalents (in shares)	81,268	4,915	37,393	2,601
DSU Awards
Weighted Average Shares Outstanding
Dilutive effect of common stock equivalents (in shares)	10,414	12,796	14,275	6,316
ESPP
Weighted Average Shares Outstanding
Dilutive effect of common stock equivalents (in shares)	5,402	7,554	8,136	2,518