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Income Taxes - Additional Information (Detail) (USD $)
 12 Months Ended
Dec. 31, 2013
Dec. 31, 2012
Dec. 31, 2011
Dec. 31, 2010
Income Tax Contingency [Line Items]        
Effective income tax rate 37.44% 37.94% 38.29%  
Excess tax benefits related to stock-based awards, which increased the cash flow from financing activities $ 19,000,000 $ 6,200,000 $ 7,100,000  
Net operating loss carryforwards for federal and state tax 16,900,000 14,900,000 9,400,000  
Expiration period of operating loss carryforwards 2019      
Company's total liability for uncertain tax positions 14,902,000 13,072,000 16,165,000 22,290,000
Uncertain tax positions recognized would favorably impact its effective tax rate 14,500,000      
Increase in uncertain tax position 1,800,000      
Decrease in uncertain tax position   3,100,000    
Interest and penalties related to income tax liabilities   300,000 400,000  
Company's accrued liability for interest and penalties related to income tax liabilities 8,400,000 9,000,000    
Decrease of interest and penalties 600,000      
Accounts payable and accrued expenses 23,300,000 22,100,000    
Scenario, Forecast [Member]
        
Income Tax Contingency [Line Items]        
Increase in uncertain tax position 3,800,000      
Decrease in uncertain tax position $ 1,500,000      
Minimum [Member]
        
Income Tax Contingency [Line Items]        
Federal and state income tax examinations 2004      
Maximum [Member]
        
Income Tax Contingency [Line Items]        
Federal and state income tax examinations 2012