Annual report pursuant to Section 13 and 15(d)

Income Taxes - Additional Information (Detail)

v3.8.0.1
Income Taxes - Additional Information (Detail) - USD ($)
3 Months Ended 12 Months Ended
Dec. 31, 2017
Dec. 31, 2018
Dec. 31, 2017
Dec. 31, 2016
Dec. 31, 2015
Dec. 31, 2014
Schedule Of Income Taxes [Line Items]            
Federal corporate tax rate     35.00%      
Maximum measurement period to complete accounting     1 year      
Tax cuts and jobs act of 2017, incomplete accounting, provisional income tax expense (benefit) $ 99,900,000   $ 99,900,000      
Impact on deferred tax assets due to corporate tax rate reduction     1,900,000      
Provisional transitional tax liability     98,000,000      
Decrease in tax payable related to additional federal expense as result of Tax Act     5,900,000      
Increase in deferred tax liabilities     3,500,000      
Net benefit from the reduction in the future tax rate     $ 2,400,000      
U.S. federal and state statutory rate     39.00%      
Income (loss) before income taxes     $ 384,260,000 $ 359,484,000 $ 333,497,000  
Income tax expense     $ 149,156,000 $ 74,125,000 $ 72,450,000  
Effective tax rate     38.80% 20.60% 21.70%  
Nonrefundable withholding and other taxes     $ 3,300,000      
Cash and cash equivalents 736,431,000   736,431,000 $ 718,536,000 $ 507,991,000 $ 466,685,000
Cumulative total earnings 178,800,000   178,800,000 699,600,000    
Increase in valuation allowance     7,800,000      
Increase in unrecognized tax benefits     800,000      
Unrecognized tax benefits that would be recorded as reduction in income tax expense if recognized 1,600,000   1,600,000      
Interest and penalties     500,000 400,000 600,000  
Accrued interest and penalties 1,500,000   1,500,000 1,100,000    
Prior year unrecognized tax benefits by result of expiring statutes     355,000 126,000    
Reduction in prior period unrecognized tax benefits     0      
Income Tax Examination [Member]            
Schedule Of Income Taxes [Line Items]            
Reasonably possible decrease in unrecognized tax benefits in next twelve month 900,000   900,000      
Other international [Member]            
Schedule Of Income Taxes [Line Items]            
Increase (decrease) in net sales     435,600,000      
Non-US [Member]            
Schedule Of Income Taxes [Line Items]            
Cash and cash equivalents 391,600,000   $ 391,600,000      
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     53.20%      
Non-US [Member] | Funds Available For Repatriation [Member]            
Schedule Of Income Taxes [Line Items]            
Cash and cash equivalents 227,500,000   $ 227,500,000      
Non-U.S jurisdictions [Member]            
Schedule Of Income Taxes [Line Items]            
Income (loss) before income taxes     $ 358,600,000      
Average income tax rate     9.90%      
Income tax expense     $ 35,500,000      
Income before income taxes relates to foreign losses     17,400,000      
Net operating loss carry-forwards 94,900,000   94,900,000 69,400,000    
Valuation allowance against deferred tax assets 21,400,000   21,400,000 16,700,000    
U.S Jurisdictions [Member]            
Schedule Of Income Taxes [Line Items]            
Tax cuts and jobs act of 2017, incomplete accounting, provisional income tax expense (benefit)     99,900,000      
Income (loss) before income taxes     $ 25,628,000 105,589,000 136,726,000  
Average income tax rate     443.00%      
Income tax expense     $ 113,607,000 44,654,000 52,173,000  
Jersey [Member]            
Schedule Of Income Taxes [Line Items]            
Income (loss) before income taxes     198,048,000 146,880,000 123,721,000  
Increase in earnings before income taxes     $ 51,100,000      
Percentage of increase in earnings before income taxes     35.00%      
Other jurisdictions [Member]            
Schedule Of Income Taxes [Line Items]            
Income (loss) before income taxes     $ 82,266,000 50,620,000 40,742,000  
Income tax expense     19,272,000 17,739,000 $ 9,029,000  
State [Member]            
Schedule Of Income Taxes [Line Items]            
Tax credits due to operating loss carried back     6,600,000 5,000,000    
Net operating loss carry-forwards 31,300,000   31,300,000 31,700,000    
Valuation allowance against deferred tax assets 0   $ 0 $ 0    
Credit carry-forward expiration, description     These tax credit and net operating loss carry-forward amounts do not begin to expire until 2032 and 2025, respectively.      
Domestic and Foreign [Member] | Settlement with Taxing Authority [Member]            
Schedule Of Income Taxes [Line Items]            
Reasonably possible decrease in unrecognized tax benefits in next twelve month $ 500,000   $ 500,000      
Minimum [Member] | Non-U.S jurisdictions [Member]            
Schedule Of Income Taxes [Line Items]            
Statutory federal rate     0.00%      
Minimum [Member] | Other jurisdictions [Member]            
Schedule Of Income Taxes [Line Items]            
Consolidated earnings (loss) before taxes, percent     5.00%      
Maximum [Member] | Non-U.S jurisdictions [Member]            
Schedule Of Income Taxes [Line Items]            
Statutory federal rate     34.00%      
Scenario, Forecast [Member]            
Schedule Of Income Taxes [Line Items]            
Federal corporate tax rate   21.00%