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Net Income Per Common Share - Basic and Diluted Net Income Per Common Share (Detail) - USD ($) $ / shares in Units, $ in Thousands	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
(Numerator)
Income available to common stockholders	$ 216,354	$ 212,465	$ 193,100
(Denominator)
Weighted average shares outstanding for basic earnings per common share	33,055,152	32,919,348	32,778,355
Dilutive effect of stock compensation	561,863	575,139	661,141
Weighted-average shares outstanding for diluted earnings per common share	33,617,015	33,494,487	33,439,496
Basic earnings per share	$ 6.55	$ 6.45	$ 5.89
Diluted earnings per share	$ 6.44	$ 6.34	$ 5.77

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