Earnings Per Share - Computation of basic and diluted EPS (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021
Basic earnings per common share:
Net income	$ 119,175	$ 98,960	$ 219,504	$ 245,909
Weighted-average basic common shares	75,461	70,866	73,465	70,937
Basic earnings per common share (in dollars per share)	$ 1.58	$ 1.40	$ 2.99	$ 3.47
Diluted earnings per common share:
Net income	$ 119,175	$ 98,960	$ 219,504	$ 245,909
Weighted-average basic common shares	75,461	70,866	73,465	70,937
Effect of dilutive securities (in shares)	633	543	639	508
Weighted-average dilutive shares	76,094	71,409	74,104	71,445
Diluted earnings per common share (in dollars per share)	$ 1.57	$ 1.39	$ 2.96	$ 3.44