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Consolidated Statements of Changes in Stockholders' Equity - USD ($) $ in Thousands | Total | COMMON STOCK (Par Value: $0.01): | PAID-IN CAPITAL IN EXCESS OF PAR: | RETAINED EARNINGS (ACCUMULATED DEFICIT): | TREASURY STOCK: | ACCUMULATED OTHER COMPREHENSIVE LOSS, NET OF TAX:
--- | --- | --- | --- | --- | --- | ---
Balance at beginning of year at Dec. 31, 2013 |  |  | $ 4,409 | $ 5,346,017 | $ 422,761 | $ (1,032) | $ (36,493)
Net income (loss) |  | $ 485,397 |  |  | 485,397 |  |
Purchase of common stock (566,584; 448,223; and 439,437 shares, respectively) |  |  |  |  |  | (7,283) |
Other comprehensive income (loss), net of tax |  | (19,193) |  |  |  |  | (19,193)
Dividends paid on common stock ($0.68; $1.00; and $1.00 per share) |  |  |  |  | (442,204) |  |
Exercise of stock options (8,990 shares) |  |  |  |  | (82) | 142 |
Shares issued for restricted stock awards (2,099,865; 1,683,564; and 1,782,601, respectively) |  |  | 18 | (7,073) |  | 7,055 |
Effect of adopting Accounting Standards Update | ASU No. 2014-01 |  |  |  |  | (1,303) |  |
Compensation expense related to restricted stock awards |  |  |  | 27,454 |  |  |
Tax effect of stock plans |  | 3,225 |  | 3,225 |  |  |
Balance at end of year at Dec. 31, 2014 |  | 5,781,815 | 4,427 | 5,369,623 | 464,569 | (1,118) | (55,686)
Net income (loss) |  | (47,156) |  |  | (47,156) |  |
Purchase of common stock (566,584; 448,223; and 439,437 shares, respectively) |  |  |  |  |  | (7,020) |
Other comprehensive income (loss), net of tax |  | (1,335) |  |  |  |  | (1,335)
Dividends paid on common stock ($0.68; $1.00; and $1.00 per share) |  |  |  |  | (453,981) |  |
Shares issued for restricted stock awards (2,099,865; 1,683,564; and 1,782,601, respectively) |  |  | 17 | (7,708) |  | 7,691 |
Compensation expense related to restricted stock awards |  |  |  | 30,205 |  |  |
Proceeds from follow-on common stock offering, net |  |  | 406 | 629,276 |  |  |
Tax effect of stock plans |  | 2,486 |  | 2,486 |  |  |
Balance at end of year at Dec. 31, 2015 |  | 5,934,696 | 4,850 | 6,023,882 | (36,568) | (447) | (57,021)
Net income (loss) |  | 495,401 |  |  | 495,401 |  |
Purchase of common stock (566,584; 448,223; and 439,437 shares, respectively) |  |  |  |  |  | (8,677) |
Other comprehensive income (loss), net of tax |  | 308 |  |  |  |  | 308
Dividends paid on common stock ($0.68; $1.00; and $1.00 per share) |  |  |  |  | (330,810) |  |
Shares issued for restricted stock awards (2,099,865; 1,683,564; and 1,782,601, respectively) |  |  | 21 | (8,985) |  | 8,964 |
Effect of adopting Accounting Standards Update | ASU No. 2016-09 | [1] |  |  |  | 412 |  |
Compensation expense related to restricted stock awards |  |  |  | 32,661 |  |  |
Balance at end of year at Dec. 31, 2016 |  | $ 6,123,991 | $ 4,871 | $ 6,047,558 | $ 128,435 | $ (160) | $ (56,713)
[1] | See Note 2, "Summary of Significant Accounting Policies" for a discussion of the Company's adoption of ASU No. 2016-09.

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