Quarterly report pursuant to Section 13 or 15(d)

Income Taxes - Additional Information (Detail)

v3.5.0.2
Income Taxes - Additional Information (Detail) - USD ($)
$ in Thousands
 3 Months Ended 9 Months Ended
Sep. 30, 2016
Sep. 30, 2015
Sep. 30, 2016
Sep. 30, 2015
Dec. 31, 2015
Dec. 31, 2014
Schedule Of Income Taxes [Line Items]            
Effective tax rate 24.20% 17.70% 19.90% 21.30%    
U.S. federal and state statutory rate 39.00%          
Cash and cash equivalents $ 665,291 $ 510,679 $ 665,291 $ 510,679 $ 507,991 $ 466,685
Non-US [Member]            
Schedule Of Income Taxes [Line Items]            
Cash and cash equivalents 345,000   $ 345,000      
Non-US [Member] | Geographic concentration risk [Member] | Cash and Cash Equivalents Geographical Area [Member]            
Schedule Of Income Taxes [Line Items]            
Percentage of cash and cash equivalents     51.90%      
Non-US [Member] | Funds Available For Repatriation [Member]            
Schedule Of Income Taxes [Line Items]            
Cash and cash equivalents $ 33,400   $ 33,400      
Minimum [Member]            
Schedule Of Income Taxes [Line Items]            
Effective tax rate     18.00%      
Minimum [Member] | Non-U.S jurisdictions [Member]            
Schedule Of Income Taxes [Line Items]            
Statutory federal rate 0.00%          
Maximum [Member]            
Schedule Of Income Taxes [Line Items]            
Effective tax rate     23.00%      
Maximum [Member] | Non-U.S jurisdictions [Member]            
Schedule Of Income Taxes [Line Items]            
Statutory federal rate 34.00%