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Consolidated Statements of Stockholders' Equity - USD ($) $ in Thousands | Total | Preferred Stock [Member] | Common Stock [Member] | Additional paid-in capital [Member] | Retained Earnings [Member] | Retained Earnings [Member] Cumulative Effect, Period of Adoption, Adjustment | Retained Earnings [Member] Accounting Standards Update 2016-02 [Member] | Retained Earnings [Member] Accounting Standards Update 2016-13 [Member] | Accumulated other comprehensive (loss) income [Member] | Treasury stock [Member]
--- | --- | --- | --- | --- | --- | --- | --- | --- | --- | ---
Beginning of year at Dec. 31, 2018 |  | $ 0 | $ 205,697 | $ 390,315 | $ 1,858,414 | $ 1,858,756 | $ 342 | $ 0 | $ (77,956) | $ (584,668)
Dividend reinvestment plan |  |  | 44 | 1,510 |  |  |  |  |  |
Preferred stock issuance costs |  |  |  | 0 |  |  |  |  |  |
Preferred stock issuance costs |  | 0 |  |  |  |  |  |  |  |
Stock purchase and compensation plans |  |  | 1,227 | 26,696 |  |  |  |  |  |
Net income | $ 271,623 |  |  |  | 271,623 |  |  |  |  |
Dividends, Preferred Stock, Cash |  |  |  |  | 0 |  |  |  |  |
Dividends to common stockholders |  |  |  |  | (49,850) |  |  |  |  |
Other comprehensive (loss) income | 159,706 |  |  |  |  |  |  |  | 159,706 |
Acquisition of treasury stock - shares acquired related to employee share-based compensation plans |  |  |  |  |  |  |  |  |  | 0
End of year at Dec. 31, 2019 | $ 2,194,936 | $ 0 | 206,968 | 418,521 | 2,080,529 | 2,081,964 | 0 | 1,435 | 81,750 | (592,832)
Dividends declared per preferred share | $ 0 |  |  |  |  |  |  |  |  |
Dividends declared per common share | $ 0.83 |  |  |  |  |  |  |  |  |
Preferred stock, shares outstanding, beginning of period at Dec. 31, 2018 | 0 |  |  |  |  |  |  |  |  |
Preferred stock, shares outstanding, ending of period at Dec. 31, 2019 | 0 |  |  |  |  |  |  |  |  |
Preferred Stock, Shares Issued |  | 0 |  |  |  |  |  |  |  |
Common Stock, shares outstanding, beginning of period at Dec. 31, 2018 | 58,948,554 |  |  |  |  |  |  |  |  |
Dividend reinvestment plan | 22,087 |  |  |  |  |  |  |  |  |
Stock purchase and compensation plan | 613,678 |  |  |  |  |  |  |  |  |
Acquisition of treasury stock | 0 |  |  |  |  |  |  |  |  |
Share-based Payment Arrangement, Shares Withheld for Tax Withholding Obligation | 123,166 |  |  |  |  |  |  |  |  |
Common Stock, shares outstanding, end of period at Dec. 31, 2019 | 59,461,153 |  |  |  |  |  |  |  |  |
Share-based Payment Arrangement, Decrease for Tax Withholding Obligation |  |  |  |  |  |  |  |  |  | (8,164)
Dividend reinvestment plan |  |  | 58 | 1,645 |  |  |  |  |  |
Preferred stock issuance costs |  |  |  | (5,416) |  |  |  |  |  |
Preferred stock issuance costs |  | $ 200,000 |  |  |  |  |  |  |  |
Stock purchase and compensation plans |  |  | 1,040 | 24,235 |  |  |  |  |  |
Net income | $ 246,355 |  |  |  | 246,355 |  |  |  |  |
Dividends, Preferred Stock, Cash |  |  |  |  | 0 |  |  |  |  |
Dividends to common stockholders |  |  |  |  | (56,782) |  |  |  |  |
Other comprehensive (loss) income | 138,436 |  |  |  |  |  |  |  | 138,436 |
Acquisition of treasury stock - shares acquired related to employee share-based compensation plans |  |  |  |  |  |  |  |  |  | 0
End of year at Dec. 31, 2020 | $ 2,738,889 | $ 200,000 | 208,066 | 438,985 | 2,271,537 | $ 2,271,537 | $ 0 | $ 0 | 220,186 | (599,885)
Dividends declared per preferred share | $ 0 |  |  |  |  |  |  |  |  |
Dividends declared per common share | $ 0.94 |  |  |  |  |  |  |  |  |
Preferred stock, shares outstanding, ending of period at Dec. 31, 2020 | 8,000 |  |  |  |  |  |  |  |  |
Preferred Stock, Shares Issued |  | 8,000 |  |  |  |  |  |  |  |
Dividend reinvestment plan | 28,890 |  |  |  |  |  |  |  |  |
Stock purchase and compensation plan | 519,863 |  |  |  |  |  |  |  |  |
Acquisition of treasury stock | 0 |  |  |  |  |  |  |  |  |
Share-based Payment Arrangement, Shares Withheld for Tax Withholding Obligation | 104,103 |  |  |  |  |  |  |  |  |
Common Stock, shares outstanding, end of period at Dec. 31, 2020 | 59,905,803 |  |  |  |  |  |  |  |  |
Share-based Payment Arrangement, Decrease for Tax Withholding Obligation |  |  |  |  |  |  |  |  |  | (7,053)
Dividend reinvestment plan |  |  | 46 | 1,707 |  |  |  |  |  |
Preferred stock issuance costs |  |  |  | 0 |  |  |  |  |  |
Preferred stock issuance costs |  | $ 0 |  |  |  |  |  |  |  |
Stock purchase and compensation plans |  |  | 790 | 23,655 |  |  |  |  |  |
Net income | $ 403,837 |  |  |  | 403,837 |  |  |  |  |
Dividends, Preferred Stock, Cash |  |  |  |  | 9,353 |  |  |  |  |
Dividends to common stockholders |  |  |  |  | (62,549) |  |  |  |  |
Other comprehensive (loss) income | (105,087) |  |  |  |  |  |  |  | (105,087) |
Acquisition of treasury stock - shares acquired related to employee share-based compensation plans | (3,400) |  |  |  |  |  |  |  |  | (3,404)
End of year at Dec. 31, 2021 | $ 2,982,885 | $ 200,000 | $ 208,902 | $ 464,347 | $ 2,603,472 |  |  |  | $ 115,099 | (608,935)
Dividends declared per preferred share | $ 1,169.17 |  |  |  |  |  |  |  |  |
Dividends declared per common share | $ 1.03 |  |  |  |  |  |  |  |  |
Preferred stock, shares outstanding, ending of period at Dec. 31, 2021 | 8,000 |  |  |  |  |  |  |  |  |
Preferred Stock, Shares Issued |  | 0 |  |  |  |  |  |  |  |
Dividend reinvestment plan | 22,986 |  |  |  |  |  |  |  |  |
Stock purchase and compensation plan | 395,018 |  |  |  |  |  |  |  |  |
Acquisition of treasury stock | (52,781) |  |  |  |  |  |  |  |  |
Share-based Payment Arrangement, Shares Withheld for Tax Withholding Obligation | 86,644 |  |  |  |  |  |  |  |  |
Common Stock, shares outstanding, end of period at Dec. 31, 2021 | 60,184,382 |  |  |  |  |  |  |  |  |
Share-based Payment Arrangement, Decrease for Tax Withholding Obligation |  |  |  |  |  |  |  |  |  | $ (5,646)

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