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, 2025	Jun. 30, 2024	Jun. 30, 2025	Jun. 30, 2024
(Numerator)
Income available to common stockholders	$ 62,347	$ 50,641	$ 118,459	$ 100,975
(Denominator)
Weighted average shares outstanding for basic earnings per common share	33,255,015	33,001,180	33,243,963	32,974,582
Dilutive effect of stock compensation	540,228	523,881	538,106	545,665
Weighted-average shares outstanding for diluted earnings per common share	33,795,243	33,525,061	33,782,069	33,520,247
Basic earnings per share	$ 1.87	$ 1.53	$ 3.56	$ 3.06
Diluted earnings per share	$ 1.85	$ 1.51	$ 3.51	$ 3.01