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CONSOLIDATED STATEMENTS OF SHAREHOLDERS' EQUITY - USD ($) $ in Thousands | Total | Common stock | Paid-in capital | Paid-in capital Cumulative Effect, Period of Adoption, Adjustment | Paid-in capital Cumulative Effect, Period of Adoption, Adjusted Balance | Treasury stock | Accumulated other comprehensive income (loss) | Retained earnings | Retained earnings Cumulative Effect, Period of Adoption, Adjustment | Retained earnings Cumulative Effect, Period of Adoption, Adjusted Balance
--- | --- | --- | --- | --- | --- | --- | --- | --- | --- | ---
Balance, beginning of year at Dec. 31, 2020 |  | $ 371,353 | $ 1,862,042 | $ (68,289) | $ 1,793,753 | $ (393,326) | $ 216,821 | $ 2,642,096 | $ 68,289 | $ 2,710,385
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |  |  |  |  |  |
Reissuance of treasury stock, net under share-based compensation plans |  |  | (15,956) |  |  | 8,879 |  |  |  |
Equity compensation |  |  | 17,109 |  |  |  |  |  |  |
Purchases of common stock |  |  |  |  |  | (290,818) |  |  |  |
Other comprehensive income (loss) | $ (97,124) |  |  |  |  |  | (97,124) |  |  |
Net income | 634,983 |  |  |  |  |  |  | 634,983 |  |
Cash dividends |  |  |  |  |  |  |  | (94,677) |  |
Balance, end of year at Dec. 31, 2021 | $ 4,861,382 | 371,353 | 1,794,906 |  |  | (675,265) | 119,697 | 3,250,691 |  |
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |  |  |  |  |  |
Accounting Standards Update [Extensible Enumeration] | Accounting Standards Update 2020-06 [Member] |  |  |  |  |  |  |  |  |
Reissuance of treasury stock, net under share-based compensation plans |  |  | (20,835) |  |  | 10,741 |  |  |  |
Equity compensation |  |  | 24,771 |  |  |  |  |  |  |
Purchases of common stock |  |  |  |  |  | (385,714) |  |  |  |
Other comprehensive income (loss) | $ (601,208) |  |  |  |  |  | (601,208) |  |  |
Net income | 865,349 |  |  |  |  |  |  | 865,349 |  |
Cash dividends |  |  |  |  |  |  |  | (111,746) |  |
Balance, end of year at Dec. 31, 2022 | 4,642,740 | 371,353 | 1,798,842 |  |  | (1,050,238) | (481,511) | 4,004,294 |  |
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |  |  |  |  |  |
Conversion of 9% Debentures, net of tax |  |  | (5,315) |  |  |  |  |  |  |
Reissuance of treasury stock, net under share-based compensation plans |  |  | (17,021) |  |  | 9,764 |  |  |  |
Equity compensation |  |  | 31,607 |  |  |  |  |  |  |
Purchases of common stock |  |  |  |  |  | (343,819) |  |  |  |
Other comprehensive income (loss) | 165,230 |  |  |  |  |  | 165,230 |  |  |
Net income | 712,949 |  |  |  |  |  |  | 712,949 |  |
Cash dividends |  |  |  |  |  |  |  | (124,118) |  |
Balance, end of year at Dec. 31, 2023 | $ 5,072,017 | $ 371,353 | $ 1,808,113 |  |  | $ (1,384,293) | $ (316,281) | $ 4,593,125 |  |

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