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Accounting for Income Taxes - Additional Information (Details) - USD ($)
$ / shares in Units, $ in Thousands
3 Months Ended 6 Months Ended
Jun. 30, 2017
Jun. 30, 2016
Jun. 30, 2017
Jun. 30, 2016
Dec. 31, 2016
Income Taxes [Line Items]          
Provision for income taxes $ 15,387 $ 15,113 $ 8,164 $ 27,474  
Effective income tax rate, continuing operations 17.70% 23.20% 5.40% 23.20%  
Statutory federal income tax rate     35.00%    
Favorable resolution of tax position $ 2,500        
Unrecognized tax benefits 45,600   $ 45,600   $ 46,400
Accrued penalties and interest 2,300   $ 2,300    
Tax Holiday effect   $ 8,600   $ 17,200  
Tax holiday effect on diluted earnings per share   $ 0.11   $ 0.21  
Foreign Tax Authority          
Income Taxes [Line Items]          
Foreign income tax rate     30.00%    
Accounting Standards Update 2016-09          
Income Taxes [Line Items]          
Tax benefit $ 1,100   $ 22,400