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Condensed Consolidated Statements of Changes in Shareholders' Deficit - USD ($) $ in Thousands | Preferred Stock | Common Stock | Treasury Stock | Additional Paid-in Capital | Retained (Deficit) Earnings | Accumulated Other Comprehensive (Loss) Income | Total
--- | --- | --- | --- | --- | --- | --- | ---
Balance at Dec. 31, 2014 |  | $ 813 | $ (28,414) | $ 956,146 | $ (1,635,277) | $ (1,282) | $ (708,014)
Balance (in shares) at Dec. 31, 2014 | 8,624 | 79,161,817 |  |  |  |  |
Increase (Decrease) in Shareholders' Equity |  |  |  |  |  |  |
Share-based compensation arrangements, net of tax benefits of $8,036 and $4,375 for the six months ended June 30, 2015 and 2016 respectively |  | $ 9 |  | 18,021 |  |  | 18,030
Share-based compensation arrangements (in shares) |  | 953,721 |  |  |  |  |
Foreign currency translation adjustment |  |  |  |  |  | (1,177) | (1,177)
Net income |  |  |  |  | 4,852 |  | 4,852
Balance at Jun. 30, 2015 |  | $ 822 | (28,414) | 974,167 | (1,630,425) | (2,459) | (686,309)
Balance (in shares) at Jun. 30, 2015 | 8,624 | 80,115,538 |  |  |  |  |
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' Equity |  |  |  |  |  |  |
Share-based compensation arrangements, net of tax benefits of $8,036 and $4,375 for the six months ended June 30, 2015 and 2016 respectively |  | $ 7 |  | 12,097 |  |  | 12,104
Share-based compensation arrangements (in shares) |  | 730,483 |  |  |  |  |
Foreign currency translation adjustment |  |  |  |  |  | 1,272 | 1,272
Conversion of preferred stock |  | $ 12 |  | (12) |  |  |
Conversion of preferred stock (in shares) | (1,177) | 1,177,000 |  |  |  |  |
Net income |  |  |  |  | 57,743 |  | 57,743
Balance at Jun. 30, 2016 |  | $ 849 | $ (28,414) | $ 1,000,771 | $ (1,576,848) | $ (3,282) | $ (606,924)
Balance (in shares) at Jun. 30, 2016 | 7,447 | 82,796,758 |  |  |  |  |

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