Quarterly report pursuant to Section 13 or 15(d)

Income Taxes - Additional Information (Detail)

v3.19.2
Income Taxes - Additional Information (Detail) - USD ($)
$ in Thousands
3 Months Ended 6 Months Ended
Jun. 30, 2019
Jun. 30, 2018
Jun. 30, 2019
Jun. 30, 2018
Dec. 31, 2018
Dec. 31, 2017
Schedule Of Income Taxes [Line Items]            
U.S. federal and state statutory rate     24.90%      
Change in effective tax rate due to adjustment in discrete tax expense (benefit)   $ 1,200 $ 2,900 $ (9,200)    
Cash and cash equivalents $ 779,281 $ 844,847 779,281 $ 844,847 $ 872,237 $ 736,431
Cumulative total earnings 212,200   212,200      
Cumulative income tax expense 1,500          
Non-US [Member]            
Schedule Of Income Taxes [Line Items]            
Cash and cash equivalents 498,500   $ 498,500      
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     64.00%      
Non-US [Member] | Funds Available For Repatriation [Member]            
Schedule Of Income Taxes [Line Items]            
Cash and cash equivalents $ 498,500   $ 498,500      
Minimum [Member]            
Schedule Of Income Taxes [Line Items]            
Effective tax rate, remainder of fiscal year     17.00%      
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, remainder of fiscal year     20.00%      
Maximum [Member] | Non-U.S jurisdictions [Member]            
Schedule Of Income Taxes [Line Items]            
Statutory federal rate     34.60%