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CONSOLIDATED STATEMENTS OF STOCKHOLDERS' EQUITY - USD ($) $ in Thousands | Total | Common Stock Member | Additional Paid In Capital Member | Retained Earnings Member | Treasury Stock Member | Accumulated Other Comprehensive Income Member
--- | --- | --- | --- | --- | --- | ---
Total stockholders equity at Dec. 31, 2015 | $ 6,135,381 | $ 791 | $ 1,816,142 | $ 4,620,303 | $ (1,010,139) | $ 708,284
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |  |
Net Income (Loss) Attributable to Parent | 701,443 |  |  | 701,443 |  |
Other Comprehensive Income (Loss), Net of Tax | 431,045 |  |  |  |  | 431,045
Dividends to stockholders, $2.20 per share | (100,371) |  |  | (100,371) |  |
Purchase of treasury stock | (122,916) |  |  |  | 122,916 |
Reissuance of treasury stock | (48,500) |  | (32,469) | (22,245) | (38,276) |
Total stockholders equity at Dec. 31, 2016 | 7,093,082 | 791 | 1,848,611 | 5,199,130 | (1,094,779) | 1,139,329
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |  |
New Accounting Pronouncement or Change in Accounting Principle, Effect of Adoption, Quantification | 156,400 |  |  |  |  |
New Accounting Pronouncement or Change in Accounting Principle, Effect of Adoption, Quantification | Accounting Standards Update 2018 02 [Member] | 17,723 |  |  | (138,649) |  | 156,372
Net Income (Loss) Attributable to Parent | 1,822,181 |  |  | 1,822,181 |  |
Other Comprehensive Income (Loss), Net of Tax | 767,930 |  |  |  |  | 767,930
Dividends to stockholders, $2.20 per share | (117,291) |  |  | (117,291) |  |
Purchase of treasury stock | (43,508) |  |  |  | 43,508 |
Reissuance of treasury stock | (29,418) |  | (22,295) | (29,106) | (36,229) |
Total stockholders equity at Dec. 31, 2017 | 9,569,535 | 791 | 1,870,906 | 6,736,265 | (1,102,058) | 2,063,631
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |  |
New Accounting Pronouncement or Change in Accounting Principle, Effect of Adoption, Quantification | 2,600 |  |  |  |  |
New Accounting Pronouncement or Change in Accounting Principle, Effect of Adoption, Quantification | Accounting Standards Update 2018 02 [Member] | (2,020) |  |  | 553 |  | (2,573)
Net Income (Loss) Attributable to Parent | 715,842 |  |  | 715,842 |  |
Other Comprehensive Income (Loss), Net of Tax | (1,424,295) |  |  |  |  | (1,424,295)
Dividends to stockholders, $2.20 per share | (140,110) |  |  | (140,110) |  |
Purchase of treasury stock | (299,679) |  |  |  | 299,679 |
Reissuance of treasury stock | (31,280) |  | (27,746) | (27,601) | (31,135) |
Total stockholders equity at Dec. 31, 2018 | $ 8,450,553 | $ 791 | $ 1,898,652 | $ 7,284,949 | $ (1,370,602) | $ 636,763

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