Net Income Per Common Share - Basic and Diluted Net Income Per Common Share (Detail) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2024	Jun. 30, 2023	Jun. 30, 2024	Jun. 30, 2023
(Numerator)
Income available to common stockholders	$ 50,641	$ 55,010	$ 100,975	$ 112,543
(Denominator)
Weighted average shares outstanding for basic earnings per common share	33,001,180	32,920,497	32,974,582	32,906,753
Dilutive effect of stock compensation	523,881	546,757	545,665	559,178
Weighted-average shares outstanding for diluted earnings per common share	33,525,061	33,467,254	33,520,247	33,465,931
Basic earnings per share	$ 1.53	$ 1.67	$ 3.06	$ 3.42
Diluted earnings per share	$ 1.51	$ 1.64	$ 3.01	$ 3.36