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Earnings Per Common Share - Basic and Diluted Earnings Per Common Share (Detail) - USD ($) $ in Thousands | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 30, 2020 | Jun. 30, 2019 | Jun. 30, 2020 | Jun. 30, 2019
Earnings Per Share [Abstract] |  |  |  |
Net income | $ 93,072 | $ 111,586 | $ 147,825 | $ 228,082
Less: Preferred stock dividends | 0 | 2,015 | 2,016 | 4,031
Redemption of preferred stock | 0 | 0 | 5,514 | 0
Net income available to common shareholders | 93,072 | 109,571 | 140,295 | 224,051
Less: Earnings allocated to participating securities | 868 | 906 | 1,335 | 1,886
Distributed earnings allocated to common stock | 44,453 | 44,461 | 88,965 | 86,699
Undistributed earnings allocated to common stock | 47,751 | 64,204 | 49,995 | 135,466
Net earnings allocated to common stock | $ 92,204 | $ 108,665 | $ 138,960 | $ 222,165
Weighted-average shares outstanding for basic earnings per common share | 62,596,171 | 62,789,182 | 62,619,427 | 62,898,514
Dilutive effect of stock compensation | 204,848 | 764,916 | 300,667 | 791,513
Weighted-average shares outstanding for diluted earnings per common share | 62,801,019 | 63,554,098 | 62,920,094 | 63,690,027

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