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Income Taxes (Details) (USD $) In Thousands, unless otherwise specified | 3 Months Ended | 6 Months Ended |
--- | --- | --- | ---
Jun. 30, 2014 | Jun. 30, 2013 | Jun. 30, 2014 | Jun. 30, 2013 | Dec. 31, 2013
Income Taxes |  |  |  |  |
Provision (benefit) for income taxes, as a percentage of income before income taxes | 40.50% | 34.90% | 12.20% | 34.10% |
Statutory U.S. federal income tax rate (as a percent) | 35.00% | 35.00% | 35.00% | 35.00% |
Intercompany dividends paid by foreign subsidiaries to the U.S. corporation. |  |  | $ 21,500 |  |
Income tax benefit |  |  | 6,720 |  |
Accrued amount related to unrecognized tax positions | $ 13,223 |  | $ 13,223 |  | $ 12,402

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