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Consolidated Statements of Stockholders' Equity - USD ($) $ in Thousands | Total | Common Stock [Member] | Additional Paid-In Capital [Member] | Retained Earnings [Member] | Accumulated Other Comprehensive (Loss) Income [Member] | Treasury Stock [Member]
--- | --- | --- | --- | --- | --- | ---
Beginning Balance at Dec. 31, 2012 | $ 913,822 | $ 116 | $ 542,018 | $ 750,697 | $ (3,346) | $ (375,663)
Net income | 284,501 |  |  | 284,501 |  |
Other comprehensive loss, net of tax | (64,471) |  |  |  | (64,471) |
Issuance of common stock | 89,650 | 1 | 89,649 |  |  |
Ending Balance at Dec. 31, 2013 | 1,223,502 | 117 | 631,667 | 1,035,198 | (67,817) | (375,663)
Net income | 368,707 |  |  | 368,707 |  |
Other comprehensive loss, net of tax | (223,691) |  |  |  | (223,691) |
Issuance of treasury stock | 1,125,964 |  | 1,096,698 |  |  | 29,266
Issuance of common stock | 124,080 | 3 | 124,077 |  |  |
Ending Balance at Dec. 31, 2014 | 2,618,562 | 120 | 1,852,442 | 1,403,905 | (291,508) | (346,397)
Net income | 362,431 |  |  | 362,431 |  |
Other comprehensive loss, net of tax | (279,303) |  |  |  | (279,303) |
Issuance of treasury stock | (8,119) |  |  |  |  | (8,119)
Issuance of common stock | 136,476 | 1 | 136,475 |  |  |
Ending Balance at Dec. 31, 2015 | $ 2,830,047 | $ 121 | $ 1,988,917 | $ 1,766,336 | $ (570,811) | $ (354,516)

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