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Earnings Per Common Share (Basic and Diluted Earnings Per Common Share) (Detail) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2024 | Dec. 31, 2023 | Dec. 31, 2022
Earnings Per Share [Abstract] |  |  |
Net income (loss) | $ 582,542 | $ 597,973 | $ 579,150
Less: Preferred stock dividends | 6,675 | 6,675 | 6,675
Net income (loss) available to common shareholders | 575,867 | 591,298 | 572,475
Less: Earnings allocated to participating securities | 6,236 | 6,283 | 5,210
Net earnings allocated to common stock | 569,631 | 585,015 | 567,265
Distributed earnings allocated to common stock | 239,879 | 229,749 | 207,924
Undistributed earnings allocated to common stock | $ 329,752 | $ 355,266 | $ 359,341
Weighted-average shares outstanding for basic earnings per common share | 64,120,455 | 64,204,239 | 64,156,870
Dilutive effect of stock compensation | 142,191 | 200,594 | 363,648
Weighted-average shares outstanding for diluted earnings per common share | 64,262,646 | 64,404,833 | 64,520,518

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