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Income Taxes (Details) - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2016
Dec. 31, 2015
Dec. 31, 2014
Dec. 31, 2013
Operating Loss Carryforwards [Line Items]        
Income tax provision $ 111,199 $ 106,256 $ 103,528  
Actual income tax rates 37.50% 38.10% 37.40%  
Unrecognized income tax benefits $ 3,982 $ 4,761 $ 5,203  
Unrecognized income tax benefits, if recognized, that would favorably affect the effective income tax rate 2,200 3,000    
Accrued interest expense related to unrecognized income tax benefits 500 400    
Interest expense related to unrecognized income tax benefits recognized 100 100    
Reversal of accrued interest expense related to unrecognized income tax benefits 100 100    
Unrecognized income tax benefits to be recognized in the next twelve months 3,300      
Deferred tax liabilities, net 117,362 120,598    
Valuation allowance for deferred tax assets 3,531 805    
Cash and cash equivalents 464,617 486,831 $ 432,056 $ 439,813
Other Long-Term Liabilities        
Operating Loss Carryforwards [Line Items]        
Income tax reserve 4,500 5,200    
Prepaid Expenses and Other        
Operating Loss Carryforwards [Line Items]        
Deferred tax liabilities, net 41,700 36,000    
Other Assets        
Operating Loss Carryforwards [Line Items]        
Deferred tax liabilities, net 12,900 11,300    
Other Long-Term Obligations        
Operating Loss Carryforwards [Line Items]        
Deferred tax liabilities, net 172,000 $ 167,900    
United Kingdom Subsidiary        
Operating Loss Carryforwards [Line Items]        
Trading losses 17,900      
Undistributed foreign earnings 28,100      
Cash and cash equivalents 30,200      
Puerto Rico Subsidiary        
Operating Loss Carryforwards [Line Items]        
Undistributed foreign earnings 1,400      
Cash and cash equivalents 3,000      
Income tax expense from repatriation of foreign cash held $ 500