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Income Taxes - Additional Information (Detail) - USD ($)
$ in Thousands
 3 Months Ended 12 Months Ended
Dec. 31, 2016
Sep. 30, 2016
Jun. 30, 2016
Mar. 31, 2016
Dec. 31, 2015
Sep. 30, 2015
Jun. 30, 2015
Mar. 31, 2015
Dec. 31, 2016
Dec. 31, 2015
Dec. 31, 2014
Dec. 31, 2013
Income Tax [Line Items]                        
Effective tax rate                 36.80% 37.76% 37.63%  
Effective income tax rate favorable impact of change in uncertain tax positions   $ 10,600                    
Effective tax rate excluding impact of tax settlement                 38.87% 37.76%    
Adjustment to additional paid-in capital for excess tax benefits related to stock-based awards                 $ 4,200 $ 11,600 $ 17,500  
Net operating loss carryforwards for federal and state tax $ 130,000       $ 136,600       130,000 136,600 29,000  
Uncertain tax position liability 9,469       18,447       9,469 18,447 17,165 $ 14,902
Unrecognized tax benefits that would impact effective tax rate 9,500               9,500      
Increase (decrease) in uncertain tax position                 (9,000) 1,200    
Expected increase in uncertain tax position in the next twelve months 2,200               2,200      
Expected decrease in uncertain tax position in the next twelve months 2,100               2,100      
Income tax expense (benefit) 49,919 $ 44,272 $ 51,601 $ 43,411 51,581 $ 55,640 $ 52,889 $ 43,928 189,203 204,038 191,413  
Company's accrued liability for interest and penalties related to income tax liabilities $ 1,400       $ 9,300       1,400 9,300    
Interest and Penalties [Member]                        
Income Tax [Line Items]                        
Income tax expense (benefit)                 $ (7,900) $ 600 $ 300  
Earliest Tax Year [Member]                        
Income Tax [Line Items]                        
Federal and state income tax examinations                 2012      
Latest Tax Year [Member]                        
Income Tax [Line Items]                        
Federal and state income tax examinations                 2015      
Minimum [Member]                        
Income Tax [Line Items]                        
Expiration period of operating loss carryforwards                 2019      
Maximum [Member]                        
Income Tax [Line Items]                        
Expiration period of operating loss carryforwards                 2036