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Condensed Consolidated Statements of Changes in Shareholders' Equity (USD $) In Thousands, except Share data, unless otherwise specified | Preferred Stock | Common Stock USD ($) | Additional Paid-in Capital USD ($) | Retained (Deficit) Earnings USD ($) | Accumulated Other Comprehensive (Loss) Income USD ($) | Total USD ($)
--- | --- | --- | --- | --- | --- | ---
Balance at Dec. 31, 2013 |  | $ 775 us-gaap_StockholdersEquity / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockMember | $ 887,556 us-gaap_StockholdersEquity / us-gaap_StatementEquityComponentsAxis = us-gaap_AdditionalPaidInCapitalMember | $ (130,314)us-gaap_StockholdersEquity / us-gaap_StatementEquityComponentsAxis = us-gaap_RetainedEarningsMember | $ 383 us-gaap_StockholdersEquity / us-gaap_StatementEquityComponentsAxis = us-gaap_AccumulatedOtherComprehensiveIncomeMember | $ 758,400 us-gaap_StockholdersEquity
Balance (in shares) at Dec. 31, 2013 | 8,624 us-gaap_SharesIssued / us-gaap_StatementEquityComponentsAxis = us-gaap_RedeemablePreferredStockMember | 77,788,393 us-gaap_SharesIssued / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockMember |  |  |  |
Increase (Decrease) in Shareholders' Equity |  |  |  |  |  |
Share-based compensation arrangements, net of tax benefits of $7,752 and $6,379 for the three months ended March 31, 2014 and 2015 respectively |  | 5 us-gaap_StockIssuedDuringPeriodValueShareBasedCompensation / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockMember | 15,907 us-gaap_StockIssuedDuringPeriodValueShareBasedCompensation / us-gaap_StatementEquityComponentsAxis = us-gaap_AdditionalPaidInCapitalMember |  |  | 15,912 us-gaap_StockIssuedDuringPeriodValueShareBasedCompensation
Share-based compensation arrangements (in shares) |  | 766,722 us-gaap_StockIssuedDuringPeriodSharesShareBasedCompensation / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockMember |  |  |  |
Foreign currency translation adjustment |  |  |  |  | (700)us-gaap_OtherComprehensiveIncomeForeignCurrencyTransactionAndTranslationAdjustmentNetOfTaxPortionAttributableToParent / us-gaap_StatementEquityComponentsAxis = us-gaap_AccumulatedOtherComprehensiveIncomeMember | (700)us-gaap_OtherComprehensiveIncomeForeignCurrencyTransactionAndTranslationAdjustmentNetOfTaxPortionAttributableToParent
Net income |  |  |  | 4,537 us-gaap_NetIncomeLoss / us-gaap_StatementEquityComponentsAxis = us-gaap_RetainedEarningsMember |  | 4,537 us-gaap_NetIncomeLoss
Balance at Mar. 31, 2014 |  | 780 us-gaap_StockholdersEquity / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockMember | 903,463 us-gaap_StockholdersEquity / us-gaap_StatementEquityComponentsAxis = us-gaap_AdditionalPaidInCapitalMember | (125,777)us-gaap_StockholdersEquity / us-gaap_StatementEquityComponentsAxis = us-gaap_RetainedEarningsMember | (317)us-gaap_StockholdersEquity / us-gaap_StatementEquityComponentsAxis = us-gaap_AccumulatedOtherComprehensiveIncomeMember | 778,149 us-gaap_StockholdersEquity
Balance (in shares) at Mar. 31, 2014 | 8,624 us-gaap_SharesIssued / us-gaap_StatementEquityComponentsAxis = us-gaap_RedeemablePreferredStockMember | 78,555,115 us-gaap_SharesIssued / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockMember |  |  |  |
Balance at Dec. 31, 2014 |  | 786 us-gaap_StockholdersEquity / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockMember | 918,370 us-gaap_StockholdersEquity / us-gaap_StatementEquityComponentsAxis = us-gaap_AdditionalPaidInCapitalMember | (363,388)us-gaap_StockholdersEquity / us-gaap_StatementEquityComponentsAxis = us-gaap_RetainedEarningsMember | (1,282)us-gaap_StockholdersEquity / us-gaap_StatementEquityComponentsAxis = us-gaap_AccumulatedOtherComprehensiveIncomeMember | 554,486 us-gaap_StockholdersEquity
Balance (in shares) at Dec. 31, 2014 | 8,624 us-gaap_SharesIssued / us-gaap_StatementEquityComponentsAxis = us-gaap_RedeemablePreferredStockMember | 79,161,817 us-gaap_SharesIssued / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockMember |  |  |  |
Increase (Decrease) in Shareholders' Equity |  |  |  |  |  |
Share-based compensation arrangements, net of tax benefits of $7,752 and $6,379 for the three months ended March 31, 2014 and 2015 respectively |  | 5 us-gaap_StockIssuedDuringPeriodValueShareBasedCompensation / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockMember | 11,228 us-gaap_StockIssuedDuringPeriodValueShareBasedCompensation / us-gaap_StatementEquityComponentsAxis = us-gaap_AdditionalPaidInCapitalMember |  |  | 11,233 us-gaap_StockIssuedDuringPeriodValueShareBasedCompensation
Share-based compensation arrangements (in shares) |  | 543,816 us-gaap_StockIssuedDuringPeriodSharesShareBasedCompensation / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockMember |  |  |  |
Foreign currency translation adjustment |  |  |  |  | (1,716)us-gaap_OtherComprehensiveIncomeForeignCurrencyTransactionAndTranslationAdjustmentNetOfTaxPortionAttributableToParent / us-gaap_StatementEquityComponentsAxis = us-gaap_AccumulatedOtherComprehensiveIncomeMember | (1,716)us-gaap_OtherComprehensiveIncomeForeignCurrencyTransactionAndTranslationAdjustmentNetOfTaxPortionAttributableToParent
Net income |  |  |  | 10,996 us-gaap_NetIncomeLoss / us-gaap_StatementEquityComponentsAxis = us-gaap_RetainedEarningsMember |  | 10,996 us-gaap_NetIncomeLoss
Balance at Mar. 31, 2015 |  | $ 791 us-gaap_StockholdersEquity / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockMember | $ 929,598 us-gaap_StockholdersEquity / us-gaap_StatementEquityComponentsAxis = us-gaap_AdditionalPaidInCapitalMember | $ (352,392)us-gaap_StockholdersEquity / us-gaap_StatementEquityComponentsAxis = us-gaap_RetainedEarningsMember | $ (2,998)us-gaap_StockholdersEquity / us-gaap_StatementEquityComponentsAxis = us-gaap_AccumulatedOtherComprehensiveIncomeMember | $ 574,999 us-gaap_StockholdersEquity
Balance (in shares) at Mar. 31, 2015 | 8,624 us-gaap_SharesIssued / us-gaap_StatementEquityComponentsAxis = us-gaap_RedeemablePreferredStockMember | 79,705,633 us-gaap_SharesIssued / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockMember |  |  |  |

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