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Net Income Per Common Share - Basic and Diluted Net Income Per Common Share (Detail) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2024	Sep. 30, 2023
(Numerator)
Income available to common stockholders	$ 58,903	$ 50,988	$ 159,878	$ 163,531
(Denominator)
Weighted average shares outstanding for basic earnings per common share	33,097,164	32,937,149	33,015,741	32,916,996
Dilutive effect of stock compensation	549,385	602,240	551,376	576,019
Weighted-average shares outstanding for diluted earnings per common share	33,646,549	33,539,389	33,567,117	33,493,015
Basic earnings per share	$ 1.78	$ 1.55	$ 4.84	$ 4.97
Diluted earnings per share	$ 1.75	$ 1.52	$ 4.76	$ 4.88

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