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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, 2021 | Jun. 30, 2020 | Jun. 30, 2021 | Jun. 30, 2020
Earnings Per Share [Abstract] |  |  |  |
Net income | $ 118,068 | $ 93,072 | $ 234,083 | $ 147,825
Less: Preferred stock dividends | 1,669 | 0 | 3,820 | 2,016
Redemption of preferred stock | 0 | 0 | 0 | 5,514
Net income available to common shareholders | 116,399 | 93,072 | 230,263 | 140,295
Less: Earnings allocated to participating securities | 1,141 | 868 | 2,307 | 1,335
Distributed earnings allocated to common stock | 45,824 | 44,453 | 91,484 | 88,965
Undistributed earnings allocated to common stock | 69,434 | 47,751 | 136,472 | 49,995
Net earnings allocated to common stock | $ 115,258 | $ 92,204 | $ 227,956 | $ 138,960
Weighted-average shares outstanding for basic earnings per common share | 63,606,340 | 62,596,171 | 63,457,245 | 62,619,427
Dilutive effect of stock compensation | 495,819 | 204,848 | 511,288 | 300,667
Weighted-average shares outstanding for diluted earnings per common share | 64,102,159 | 62,801,019 | 63,968,533 | 62,920,094

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