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Consolidated Statement of Changes in Stockholders' Equity - USD ($) $ in Thousands | Total | Common Stock | Additional Paid-in Capital | Retained Earnings/(Accumulated Deficit) | Accumulated Other Comprehensive Loss, Net | Noncontrolling Interest [Member]
--- | --- | --- | --- | --- | --- | ---
Balance at Dec. 31, 2015 | $ 501,837 | $ 1,117 | $ 945,041 | $ (444,055) | $ (316) | $ 50
Balance, shares at Dec. 31, 2015 |  | 111,614,420 |  |  |  |
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |  |
Net income (loss) | 420,231 | $ 0 | 0 | 420,231 | 0 | 0
Other Comprehensive Income (Loss), Net of Tax | (299) | $ 0 | 0 | 0 | (299) | 0
Unrealized loss on investment available for sale | $ (299) |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period | 452,898 | 452,898 |  |  |  |
Stock options exercised, value | $ 2,940 | $ 4 | 2,936 | 0 | 0 | 0
Award of restricted stock units, shares |  | 670,032 |  |  |  |
Stock Issued During Period, Value, Restricted Stock Award, Net of Forfeitures | (3,368) | $ 6 | (3,374) | 0 | 0 | 0
Stock Issued During Period, Shares, Performance Stock Award, Net |  | 159,027 |  |  |  |
Stock Issued During Period, Values, Performance Stock Award, Net | (867) | $ 2 | (869) | 0 | 0 | 0
Adjustments to Additional Paid in Capital, Income Tax Benefit from Share-based Compensation | 5,812 | 0 | 5,812 | 0 | 0 | 0
Stock Repurchased and Retired During Period, Value | 0 |  |  |  |  |
Share-based compensation costs | 15,518 | 0 | 15,518 | 0 | 0 | 0
Balance at Dec. 31, 2016 | 930,180 | $ 1,129 | 953,440 | (23,824) | (615) | 50
Balance, shares at Dec. 31, 2016 |  | 112,896,377 |  |  |  |
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |  |
Cumulative Effect of New Accounting Principle in Period of Adoption | 15,777 | $ 0 | 0 | 15,777 | 0 | 0
Net income (loss) | 189,390 | 0 | 0 | 189,390 | 0 | 0
Other Comprehensive Income (Loss), Net of Tax | 433 | $ 0 | 0 | 0 | 433 | 0
Unrealized loss on investment available for sale | $ 433 |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period | 241,964 | 241,964 |  |  |  |
Stock options exercised, value | $ 2,084 | $ 2 | 2,082 | 0 | 0 | 0
Award of restricted stock units, shares |  | 520,854 |  |  |  |
Stock Issued During Period, Value, Restricted Stock Award, Net of Forfeitures | (8,004) | $ 5 | (8,009) | 0 | 0 | 0
Stock Issued During Period, Shares, Performance Stock Award, Net |  | 173,653 |  |  |  |
Stock Issued During Period, Values, Performance Stock Award, Net | (1,791) | $ 2 | (1,793) | 0 | 0 | 0
Dividends, Cash | $ (16,918) | $ 0 | 0 | (16,918) | 0 | 0
Stock Repurchased and Retired During Period, Shares | 1,198,000 | (1,198,430) |  |  |  |
Stock Repurchased and Retired During Period, Value | $ (31,927) | $ (12) | (31,915) | 0 | 0 | 0
Share-based compensation costs | 17,413 | 0 | 17,413 | 0 | 0 | 0
Noncontrolling Interest, Decrease from Deconsolidation | 590 | 0 | 640 | 0 | 0 | (50)
Balance at Dec. 31, 2017 | $ 1,097,227 | $ 1,126 | 931,858 | 164,425 | (182) | 0
Balance, shares at Dec. 31, 2017 | 112,634,418 | 112,634,418 |  |  |  |
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |  |
Cumulative Effect of New Accounting Principle in Period of Adoption | $ 0 | $ 0 | 0 | (312) | 312 | 0
Net income (loss) | 115,048 | 0 | 0 | 115,048 | 0 | 0
Other Comprehensive Income (Loss), Net of Tax | (1,195) | $ 0 | 0 | 0 | (1,195) | 0
Unrealized loss on investment available for sale | $ (1,195) |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period | 338,426 | 338,426 |  |  |  |
Stock options exercised, value | $ 3,542 | $ 3 | 3,539 | 0 | 0 | 0
Award of restricted stock units, shares |  | 300,177 |  |  |  |
Stock Issued During Period, Value, Restricted Stock Award, Net of Forfeitures | (3,616) | $ 3 | (3,619) | 0 | 0 | 0
Stock Issued During Period, Shares, Performance Stock Award, Net |  | 337,537 |  |  |  |
Stock Issued During Period, Values, Performance Stock Award, Net | (5,270) | $ 4 | (5,274) | 0 | 0 | 0
Dividends, Cash | $ (25,804) | $ 0 | 0 | (25,804) | 0 | 0
Stock Repurchased and Retired During Period, Shares | 1,853,000 | (1,853,453) |  |  |  |
Stock Repurchased and Retired During Period, Value | $ (59,570) | $ (18) | (59,552) | 0 | 0 | 0
Share-based compensation costs | 25,379 | 0 | 25,379 | 0 | 0 | 0
Balance at Dec. 31, 2018 | $ 1,145,741 | $ 1,118 | $ 892,331 | $ 253,357 | $ (1,065) | $ 0
Balance, shares at Dec. 31, 2018 | 111,757,105 | 111,757,105 |  |  |  |

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- Definition Amount of stockholders' equity (deficit), net of receivables from officers, directors, owners, and affiliates of the entity, attributable to both the parent and noncontrolling interests. Amount excludes temporary equity. Alternate caption for the concept is permanent equity. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 810 -SubTopic 10 -Section 45 -Paragraph 16 -URI http://asc.fasb.org/extlink&oid=108774443&loc=SL4568740-111683 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 810 -SubTopic 10 -Section 55 -Paragraph 4I -URI http://asc.fasb.org/extlink&oid=84234705&loc=SL4590271-111686 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 810 -SubTopic 10 -Section 45 -Paragraph 15 -URI http://asc.fasb.org/extlink&oid=108774443&loc=SL4568447-111683 + Details
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Data Type: | xbrli:monetaryItemType
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Period Type: | instant