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Accounting for Income Taxes - Additional Information (Details) - USD ($)
$ / shares in Units, $ in Thousands
3 Months Ended 9 Months Ended
Sep. 30, 2017
Sep. 30, 2016
Sep. 30, 2017
Sep. 30, 2016
Dec. 31, 2016
Income Taxes [Line Items]          
Provision for income taxes $ 18,344 $ 11,698 $ 26,508 $ 39,172  
Effective income tax rate, continuing operations 17.90% 18.40% 10.50% 21.60%  
Statutory federal income tax rate     35.00%    
Unrecognized tax benefits $ 46,100   $ 46,100   $ 46,400
Accrued penalties and interest 2,600   $ 2,600    
Tax Holiday effect   $ 300   $ 17,500  
Tax holiday effect on diluted earnings per share       $ 0.21  
Foreign Tax Authority          
Income Taxes [Line Items]          
Foreign income tax rate     30.00% 30.00%  
Accounting Standards Update 2016-09          
Income Taxes [Line Items]          
Tax benefit $ 1,700   $ 24,100