Quarterly report pursuant to Section 13 or 15(d)

Income Taxes (Details)

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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