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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] | Accumulated other comprehensive income (loss) [Member] | Treasury stock [Member]
--- | --- | --- | --- | --- | --- | --- | ---
Preferred Stock, Shares Outstanding (share amounts not in thousands) | 8,000 |  |  |  |  |  |
Beginning of period at Dec. 31, 2021 |  | $ 200,000 | $ 208,902 | $ 464,347 | $ 2,603,472 | $ 115,099 | $ (608,935)
Issuance of preferred stock |  | 0 |  |  |  |  |
Dividend reinvestment plan |  |  | 11 | 443 |  |  |
Stock purchase and compensation plans |  |  | 423 | 8,000 |  |  |
Net income | $ 56,330 |  |  |  | 56,330 |  |
Dividends to preferred stockholders |  |  |  |  | (2,300) |  |
Dividends to common stockholders |  |  |  |  | (17,065) |  |
Other comprehensive income (loss) | (244,894) |  |  |  |  | (244,894) |
Acquisition of treasury stock - share repurchase authorization |  |  |  |  |  |  | (76)
Acquisition of treasury stock - shares acquired related to employee-share based compensation plans |  |  |  |  |  |  | (5,516)
End of period at Mar. 31, 2022 | $ 2,778,241 | $ 200,000 | 209,336 | 472,790 | 2,640,437 | (129,795) | (614,527)
Dividends declared per share to preferred stockholders (Per share $ not in thousands) | $ 287.50 |  |  |  |  |  |
Dividends declared per share to common stockholders (Per share $ not in thousands) | $ 0.28 |  |  |  |  |  |
Issuance of preferred stock, shares (share amounts not in thousands) |  | 0 |  |  |  |  |
Common stock, shares outstanding, beginning of period (share amounts not in thousands) at Dec. 31, 2021 | 60,184,382 |  |  |  |  |  |
Dividend reinvestment plan, shares (share amounts not in thousands) | 5,641 |  |  |  |  |  |
Stock purchase and compensation plan, shares (share amounts not in thousands) | 218,442 |  |  |  |  |  |
Acquisition of treasury stock, share repurchase authorization, shares (share amounts not in thousands) | (1,000) |  |  |  |  |  |
Acquisition of treasury stock - shares acquired related to employee share-based compensation plans, shares (share amounts not in thousands) | (71,993) |  |  |  |  |  |
Common stock, shares outstanding, end of period (share amounts not in thousands) at Mar. 31, 2022 | 60,335,472 |  |  |  |  |  |
Preferred Stock, Shares Outstanding (share amounts not in thousands) | 8,000 |  |  |  |  |  |
Preferred Stock, Shares Outstanding (share amounts not in thousands) | 8,000 |  |  |  |  |  |
Beginning of period at Dec. 31, 2022 | $ 2,527,564 | $ 200,000 | 209,694 | 493,488 | 2,749,703 | (498,042) | (627,279)
Issuance of preferred stock |  | 0 |  |  |  |  |
Dividend reinvestment plan |  |  | 9 | 459 |  |  |
Stock purchase and compensation plans |  |  | 446 | 8,766 |  |  |
Net income | 92,574 |  |  |  | 92,574 |  |
Dividends to preferred stockholders |  |  |  |  | (2,300) |  |
Dividends to common stockholders |  |  |  |  | (18,364) |  |
Other comprehensive income (loss) | 67,693 |  |  |  |  | 67,693 |
Acquisition of treasury stock - share repurchase authorization |  |  |  |  |  |  | 0
Acquisition of treasury stock - shares acquired related to employee-share based compensation plans |  |  |  |  |  |  | (7,443)
End of period at Mar. 31, 2023 | $ 2,669,404 | $ 200,000 | $ 210,149 | $ 502,713 | $ 2,821,613 | $ (430,349) | $ (634,722)
Dividends declared per share to preferred stockholders (Per share $ not in thousands) | $ 287.50 |  |  |  |  |  |
Dividends declared per share to common stockholders (Per share $ not in thousands) | $ 0.30 |  |  |  |  |  |
Issuance of preferred stock, shares (share amounts not in thousands) |  | 0 |  |  |  |  |
Common stock, shares outstanding, beginning of period (share amounts not in thousands) at Dec. 31, 2022 | 60,338,900 |  |  |  |  |  |
Dividend reinvestment plan, shares (share amounts not in thousands) | 4,650 |  |  |  |  |  |
Stock purchase and compensation plan, shares (share amounts not in thousands) | 222,816 |  |  |  |  |  |
Acquisition of treasury stock, share repurchase authorization, shares (share amounts not in thousands) | 0 |  |  |  |  |  |
Acquisition of treasury stock - shares acquired related to employee share-based compensation plans, shares (share amounts not in thousands) | (73,780) |  |  |  |  |  |
Common stock, shares outstanding, end of period (share amounts not in thousands) at Mar. 31, 2023 | 60,492,586 |  |  |  |  |  |
Preferred Stock, Shares Outstanding (share amounts not in thousands) | 8,000 |  |  |  |  |  |

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