Quarterly report pursuant to Section 13 or 15(d)

Income Taxes - Additional Information (Detail)

v3.7.0.1
Income Taxes - Additional Information (Detail) - USD ($)
$ in Thousands
 3 Months Ended 6 Months Ended
Jun. 30, 2017
Jun. 30, 2016
Jun. 30, 2017
Jun. 30, 2016
Dec. 31, 2016
Dec. 31, 2015
Schedule Of Income Taxes [Line Items]            
Effective tax rate 16.10% 12.70% 14.90% 18.10%    
U.S. federal and state statutory rate     39.00%      
Cash and cash equivalents $ 751,581 $ 628,827 $ 751,581 $ 628,827 $ 718,536 $ 507,991
Non-US [Member]            
Schedule Of Income Taxes [Line Items]            
Cash and cash equivalents 453,900   $ 453,900      
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     60.40%      
Non-US [Member] | Funds Available For Repatriation [Member]            
Schedule Of Income Taxes [Line Items]            
Cash and cash equivalents 40,900   $ 40,900      
ASU 2016-09 [Member]            
Schedule Of Income Taxes [Line Items]            
Tax (expense) benefit from share-based compensation $ (300)   $ 900      
Minimum [Member]            
Schedule Of Income Taxes [Line Items]            
Effective tax rate     14.00%      
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     19.00%      
Maximum [Member] | Non-U.S jurisdictions [Member]            
Schedule Of Income Taxes [Line Items]            
Statutory federal rate     34.00%