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Condensed Consolidated Statements of Changes in Shareholders' (Deficit) Equity - USD ($) $ in Thousands | Preferred Stock | Common Stock | Treasury Stock | Additional Paid-in Capital | Retained (Deficit) | Accumulated Other Comprehensive (Loss) | Total
--- | --- | --- | --- | --- | --- | --- | ---
Balance at Dec. 31, 2015 |  | $ 830 | $ (28,414) | $ 988,686 | $ (1,634,591) | $ (4,554) | $ (678,043)
Balance (in shares) at Dec. 31, 2015 | 8,624 | 80,889,275 |  |  |  |  |
Increase (Decrease) in Shareholders' Deficit |  |  |  |  |  |  |
Share-based compensation arrangements, net of tax benefits of $8,510 for the period ended September 30, 2016 |  | $ 8 |  | 18,835 |  |  | 18,843
Share-based compensation arrangements (in shares) |  | 859,560 |  |  |  |  |
Foreign currency translation adjustment |  |  |  |  |  | 1,060 | 1,060
Conversion of preferred stock |  | $ 17 |  | (17) |  |  |
Conversion of preferred stock (in shares) | (1,693) | 1,693,000 |  |  |  |  |
Net income |  |  |  |  | 104,278 |  | 104,278
Balance at Sep. 30, 2016 |  | $ 855 | (28,414) | 1,007,504 | (1,530,313) | (3,494) | (553,862)
Balance (in shares) at Sep. 30, 2016 | 6,931 | 83,441,835 |  |  |  |  |
Balance at Dec. 31, 2016 |  | $ 932 | (28,414) | 1,014,119 | (1,525,281) | (4,676) | (543,320)
Balance (in shares) at Dec. 31, 2016 |  | 91,122,308 |  |  |  |  |
Increase (Decrease) in Shareholders' Deficit |  |  |  |  |  |  |
Repurchase of Preferred Stock |  | $ (13) |  | (24,783) |  |  | (24,796)
Repurchase of Preferred Stock (in shares) |  | (1,264,149) |  |  |  |  |
Share-based compensation arrangements, net of tax benefits of $8,510 for the period ended September 30, 2016 |  | $ 10 |  | 13,104 |  |  | 13,114
Share-based compensation arrangements (in shares) |  | 1,028,349 |  |  |  |  |
Foreign currency translation adjustment |  |  |  |  |  | 3,491 | 3,491
Net income |  |  |  |  | 811,523 |  | 811,523
Balance at Sep. 30, 2017 |  | $ 929 | $ (28,414) | $ 1,002,440 | $ (713,758) | $ (1,185) | $ 260,012
Balance (in shares) at Sep. 30, 2017 |  | 90,886,508 |  |  |  |  |

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