Earnings Per Share - Computation of basic and diluted EPS (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021
Basic earnings per common share:
Net income	$ 133,043	$ 122,788	$ 352,547	$ 368,697
Weighted-average basic common shares	75,606	70,066	74,185	70,643
Basic earnings per common share (in dollars per share)	$ 1.76	$ 1.75	$ 4.75	$ 5.22
Diluted earnings per common share:
Net income	$ 133,043	$ 122,788	$ 352,547	$ 368,697
Weighted-average basic common shares	75,606	70,066	74,185	70,643
Effect of dilutive securities (in shares)	576	510	606	465
Weighted-average dilutive shares	76,182	70,576	74,791	71,108
Diluted earnings per common share (in dollars per share)	$ 1.75	$ 1.74	$ 4.71	$ 5.19