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Earnings Per Common Share - Basic and Diluted Earnings Per Common Share (Detail) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021
Earnings Per Share [Abstract]
Net income	$ 99,102	$ 116,015
Less: Preferred stock dividends	1,669	2,151
Net income available to common shareholders	97,433	113,864
Less: Earnings allocated to participating securities	849	1,162
Distributed earnings allocated to common stock	48,051	45,660
Undistributed earnings allocated to common stock	48,533	67,042
Net earnings allocated to common stock	$ 96,584	$ 112,702
Weighted-average shares outstanding for basic earnings per common share	64,051,202	63,306,493
Dilutive effect of stock compensation	409,705	509,290
Weighted-average shares outstanding for diluted earnings per common share	64,460,907	63,815,783

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