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Consolidated Statements of Changes in Stockholders' Equity - USD ($) $ in Thousands | Total | Common Stock [Member] | Additional Paid-In Capital [Member] | Unallocated Common Stock Held by ESOP [Member] | Accumulated Other Comprehensive Income [Member] | Retained Earnings [Member]
--- | --- | --- | --- | --- | --- | ---
Stockholders' equity at beginning of period at Dec. 31, 2012 | $ 1,720,237 | $ 61,751 | $ 496,715 | $ (2,583) | $ 686,807 | $ 477,547
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |  |
Net income | 253,283 |  |  |  |  | 253,283
Other comprehensive income (loss) | (640,611) |  |  |  | (640,611) |
Allocation of common stock by ESOP, including excess income tax benefits | 3,390 |  | 1,438 | 1,952 |  |
Share-based compensation, including excess income tax benefits | 13,624 |  | 13,624 |  |  |
Issuance of common stock under compensation plans, including excess income tax benefits | 32,735 | 3,295 | 29,440 |  |  |
Extinguishment of convertible senior notes, net of tax, including shares of common stock issued upon conversion | 62,663 | 5,489 | 57,174 |  |  |
Warrants reclassified to embedded derivative liability to be settled in cash | (47,991) |  | (47,991) |  |  |
Dividends on common stock | (12,643) |  |  |  |  | (12,643)
Stockholders' equity at end of period at Dec. 31, 2013 | 1,384,687 | 70,535 | 550,400 | (631) | 46,196 | 718,187
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |  |
Net income | 126,023 |  |  |  |  | 126,023
Other comprehensive income (loss) | 675,205 |  |  |  | 675,205 |
Allocation of common stock by ESOP, including excess income tax benefits | 1,352 |  | 721 | 631 |  |
Share-based compensation, including excess income tax benefits | 7,705 |  | 7,705 |  |  |
Issuance of common stock under compensation plans, including excess income tax benefits | 14,705 | 1,568 | 13,137 |  |  |
Extinguishment of convertible senior notes, net of tax, including shares of common stock issued upon conversion | (3,529) | 3,959 | (7,488) |  |  |
Warrants reclassified to embedded derivative liability to be settled in cash | (51,257) |  | (51,257) |  |  |
Dividends on common stock | (15,015) |  |  |  |  | (15,015)
Stockholders' equity at end of period at Dec. 31, 2014 | 2,139,876 | 76,062 | 513,218 | 0 | 721,401 | 829,195
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |  |
Net income | 219,830 |  |  |  |  | 219,830
Other comprehensive income (loss) | (519,738) |  |  |  | (519,738) |
Share-based compensation, including excess income tax benefits | 9,976 |  | 9,976 |  |  |
Issuance of common stock via public offering | 104,479 | 4,300 | 100,179 |  |  |
Issuance of common stock under compensation plans, including excess income tax benefits | 7,986 | 944 | 7,042 |  |  |
Issuance of common stock to settle warrants that have reached their expiration | 0 | 48 | (48) |  |  |
Dividends on common stock | (17,874) |  |  |  |  | (17,874)
Stockholders' equity at end of period at Dec. 31, 2015 | $ 1,944,535 | $ 81,354 | $ 630,367 | $ 0 | $ 201,663 | $ 1,031,151

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