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CONSOLIDATED STATEMENTS OF CHANGES IN STOCKHOLDERS' EQUITY (USD $) In Thousands, unless otherwise specified | Total | Common Stock | Treasury Stock | Additional Paid-In Capital | Accumulated Other Comprehensive Income (Loss) | Retained Earnings
--- | --- | --- | --- | --- | --- | ---
Balance at Dec. 31, 2011 | $ 492,638 us-gaap_StockholdersEquity | $ 357 us-gaap_StockholdersEquity / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockMember | $ (367,121)us-gaap_StockholdersEquity / us-gaap_StatementEquityComponentsAxis = us-gaap_TreasuryStockMember | $ 607,676 us-gaap_StockholdersEquity / us-gaap_StatementEquityComponentsAxis = us-gaap_AdditionalPaidInCapitalMember | $ (9,093)us-gaap_StockholdersEquity / us-gaap_StatementEquityComponentsAxis = us-gaap_AccumulatedOtherComprehensiveIncomeMember | $ 260,819 us-gaap_StockholdersEquity / us-gaap_StatementEquityComponentsAxis = us-gaap_RetainedEarningsMember
Treasury Stock, shares at Dec. 31, 2011 |  |  | (8,903)us-gaap_TreasuryStockShares / us-gaap_StatementEquityComponentsAxis = us-gaap_TreasuryStockMember |  |  |
Common Stock, shares at Dec. 31, 2011 |  | 35,734 us-gaap_SharesIssued / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockMember |  |  |  |
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |  |
Net income (loss) | 41,204 us-gaap_NetIncomeLoss |  |  |  |  | 41,204 us-gaap_NetIncomeLoss / us-gaap_StatementEquityComponentsAxis = us-gaap_RetainedEarningsMember
Other comprehensive income (loss), net of tax | 4,296 us-gaap_OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent |  |  |  | 4,296 us-gaap_OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent / us-gaap_StatementEquityComponentsAxis = us-gaap_AccumulatedOtherComprehensiveIncomeMember |
Issuance of common stock through employee benefit plans | 251 us-gaap_StockIssuedDuringPeriodValueEmployeeBenefitPlan | 1 us-gaap_StockIssuedDuringPeriodValueEmployeeBenefitPlan / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockMember |  | 250 us-gaap_StockIssuedDuringPeriodValueEmployeeBenefitPlan / us-gaap_StatementEquityComponentsAxis = us-gaap_AdditionalPaidInCapitalMember |  |
Issuance of common stock through employee benefit plans, shares |  | 9 us-gaap_StockIssuedDuringPeriodSharesEmployeeBenefitPlan / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockMember |  |  |  |
Share-based compensation | (20,614)us-gaap_StockIssuedDuringPeriodValueShareBasedCompensation | 11 us-gaap_StockIssuedDuringPeriodValueShareBasedCompensation / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockMember |  | (20,625)us-gaap_StockIssuedDuringPeriodValueShareBasedCompensation / us-gaap_StatementEquityComponentsAxis = us-gaap_AdditionalPaidInCapitalMember |  |
Share-based compensation, shares |  | 1,109 us-gaap_StockIssuedDuringPeriodSharesShareBasedCompensation / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockMember |  |  |  |
Balance at Dec. 31, 2012 | 517,775 us-gaap_StockholdersEquity | 369 us-gaap_StockholdersEquity / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockMember | (367,121)us-gaap_StockholdersEquity / us-gaap_StatementEquityComponentsAxis = us-gaap_TreasuryStockMember | 587,301 us-gaap_StockholdersEquity / us-gaap_StatementEquityComponentsAxis = us-gaap_AdditionalPaidInCapitalMember | (4,797)us-gaap_StockholdersEquity / us-gaap_StatementEquityComponentsAxis = us-gaap_AccumulatedOtherComprehensiveIncomeMember | 302,023 us-gaap_StockholdersEquity / us-gaap_StatementEquityComponentsAxis = us-gaap_RetainedEarningsMember
Treasury Stock, shares at Dec. 31, 2012 |  |  | (8,903)us-gaap_TreasuryStockShares / us-gaap_StatementEquityComponentsAxis = us-gaap_TreasuryStockMember |  |  |
Common Stock, shares at Dec. 31, 2012 |  | 36,852 us-gaap_SharesIssued / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockMember |  |  |  |
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |  |
Net income (loss) | (21,067)us-gaap_NetIncomeLoss |  |  |  |  | (21,067)us-gaap_NetIncomeLoss / us-gaap_StatementEquityComponentsAxis = us-gaap_RetainedEarningsMember
Other comprehensive income (loss), net of tax | 5,724 us-gaap_OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent |  |  |  | 5,724 us-gaap_OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent / us-gaap_StatementEquityComponentsAxis = us-gaap_AccumulatedOtherComprehensiveIncomeMember |
Issuance of common stock through employee benefit plans | 234 us-gaap_StockIssuedDuringPeriodValueEmployeeBenefitPlan | 0 us-gaap_StockIssuedDuringPeriodValueEmployeeBenefitPlan / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockMember |  | 234 us-gaap_StockIssuedDuringPeriodValueEmployeeBenefitPlan / us-gaap_StatementEquityComponentsAxis = us-gaap_AdditionalPaidInCapitalMember |  |
Issuance of common stock through employee benefit plans, shares |  | 6 us-gaap_StockIssuedDuringPeriodSharesEmployeeBenefitPlan / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockMember |  |  |  |
Share-based compensation | 10,966 us-gaap_StockIssuedDuringPeriodValueShareBasedCompensation | 1 us-gaap_StockIssuedDuringPeriodValueShareBasedCompensation / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockMember |  | 10,965 us-gaap_StockIssuedDuringPeriodValueShareBasedCompensation / us-gaap_StatementEquityComponentsAxis = us-gaap_AdditionalPaidInCapitalMember |  |
Share-based compensation, shares |  | 159 us-gaap_StockIssuedDuringPeriodSharesShareBasedCompensation / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockMember |  |  |  |
Issuance of common stock | 152,458 us-gaap_StockIssuedDuringPeriodValueNewIssues | 40 us-gaap_StockIssuedDuringPeriodValueNewIssues / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockMember |  | 152,418 us-gaap_StockIssuedDuringPeriodValueNewIssues / us-gaap_StatementEquityComponentsAxis = us-gaap_AdditionalPaidInCapitalMember |  |
Issuance of common stock, shares |  | 4,025 us-gaap_StockIssuedDuringPeriodSharesNewIssues / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockMember |  |  |  |
Balance at Dec. 31, 2013 | 666,090 us-gaap_StockholdersEquity | 410 us-gaap_StockholdersEquity / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockMember | (367,121)us-gaap_StockholdersEquity / us-gaap_StatementEquityComponentsAxis = us-gaap_TreasuryStockMember | 750,918 us-gaap_StockholdersEquity / us-gaap_StatementEquityComponentsAxis = us-gaap_AdditionalPaidInCapitalMember | 927 us-gaap_StockholdersEquity / us-gaap_StatementEquityComponentsAxis = us-gaap_AccumulatedOtherComprehensiveIncomeMember | 280,956 us-gaap_StockholdersEquity / us-gaap_StatementEquityComponentsAxis = us-gaap_RetainedEarningsMember
Treasury Stock, shares at Dec. 31, 2013 | (8,903)us-gaap_TreasuryStockShares |  | (8,903)us-gaap_TreasuryStockShares / us-gaap_StatementEquityComponentsAxis = us-gaap_TreasuryStockMember |  |  |
Common Stock, shares at Dec. 31, 2013 |  | 41,042 us-gaap_SharesIssued / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockMember |  |  |  |
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |  |
Net income (loss) | 34,004 us-gaap_NetIncomeLoss |  |  |  |  | 34,004 us-gaap_NetIncomeLoss / us-gaap_StatementEquityComponentsAxis = us-gaap_RetainedEarningsMember
Other comprehensive income (loss), net of tax | (24,415)us-gaap_OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent |  |  |  | (24,415)us-gaap_OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent / us-gaap_StatementEquityComponentsAxis = us-gaap_AccumulatedOtherComprehensiveIncomeMember |
Issuance of common stock through employee benefit plans | 286 us-gaap_StockIssuedDuringPeriodValueEmployeeBenefitPlan | 0 us-gaap_StockIssuedDuringPeriodValueEmployeeBenefitPlan / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockMember |  | 286 us-gaap_StockIssuedDuringPeriodValueEmployeeBenefitPlan / us-gaap_StatementEquityComponentsAxis = us-gaap_AdditionalPaidInCapitalMember |  |
Issuance of common stock through employee benefit plans, shares |  | 6 us-gaap_StockIssuedDuringPeriodSharesEmployeeBenefitPlan / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockMember |  |  |  |
Share-based compensation | 28,357 us-gaap_StockIssuedDuringPeriodValueShareBasedCompensation | 6 us-gaap_StockIssuedDuringPeriodValueShareBasedCompensation / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockMember |  | 28,351 us-gaap_StockIssuedDuringPeriodValueShareBasedCompensation / us-gaap_StatementEquityComponentsAxis = us-gaap_AdditionalPaidInCapitalMember |  |
Share-based compensation, shares |  | 596 us-gaap_StockIssuedDuringPeriodSharesShareBasedCompensation / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockMember |  |  |  |
Balance at Dec. 31, 2014 | $ 704,322 us-gaap_StockholdersEquity | $ 416 us-gaap_StockholdersEquity / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockMember | $ (367,121)us-gaap_StockholdersEquity / us-gaap_StatementEquityComponentsAxis = us-gaap_TreasuryStockMember | $ 779,555 us-gaap_StockholdersEquity / us-gaap_StatementEquityComponentsAxis = us-gaap_AdditionalPaidInCapitalMember | $ (23,488)us-gaap_StockholdersEquity / us-gaap_StatementEquityComponentsAxis = us-gaap_AccumulatedOtherComprehensiveIncomeMember | $ 314,960 us-gaap_StockholdersEquity / us-gaap_StatementEquityComponentsAxis = us-gaap_RetainedEarningsMember
Treasury Stock, shares at Dec. 31, 2014 | (8,903)us-gaap_TreasuryStockShares |  | (8,903)us-gaap_TreasuryStockShares / us-gaap_StatementEquityComponentsAxis = us-gaap_TreasuryStockMember |  |  |
Common Stock, shares at Dec. 31, 2014 |  | 41,644 us-gaap_SharesIssued / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockMember |  |  |  |

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