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, 2024	Jun. 30, 2023	Jun. 30, 2024	Jun. 30, 2023
Basic earnings per common share:
Net income	$ 132,370	$ 123,447	$ 247,426	$ 263,373
Weighted-average basic common shares	76,251	76,058	76,276	75,981
Basic earnings per common share (in dollars per share)	$ 1.74	$ 1.62	$ 3.24	$ 3.47
Diluted earnings per common share:
Net income	$ 132,370	$ 123,447	$ 247,426	$ 263,373
Weighted-average basic common shares	76,251	76,058	76,276	75,981
Effect of dilutive securities (in shares)	356	360	354	413
Weighted-average dilutive shares	76,607	76,418	76,630	76,394
Diluted earnings per common share (in dollars per share)	$ 1.73	$ 1.62	$ 3.23	$ 3.45