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, 2024	Sep. 30, 2023	Sep. 30, 2024	Sep. 30, 2023
Basic earnings per common share:
Net income	$ 143,179	$ 124,144	$ 390,605	$ 387,517
Weighted-average basic common shares	76,299	76,139	76,284	76,034
Basic earnings per common share (in dollars per share)	$ 1.88	$ 1.63	$ 5.12	$ 5.10
Diluted earnings per common share:
Net income	$ 143,179	$ 124,144	$ 390,605	$ 387,517
Weighted-average basic common shares	76,299	76,139	76,284	76,034
Effect of dilutive securities (in shares)	506	432	407	412
Weighted-average dilutive shares	76,805	76,571	76,691	76,446
Diluted earnings per common share (in dollars per share)	$ 1.86	$ 1.62	$ 5.09	$ 5.07