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Share-Based Compensation - Additional Information (Detail) - USD ($)
12 Months Ended
Dec. 31, 2016
Dec. 31, 2015
Dec. 31, 2014
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Cash received from option exercises $ 27,300,000 $ 21,100,000 $ 11,300,000
Tax benefit realized from stock options exercised 4,800,000 5,500,000 1,900,000
Intrinsic value of options exercised 6,900,000 8,100,000 4,400,000
Released intrinsic value $ 9,300,000 3,100,000 1,700,000
2009 Omnibus Incentive Compensation Plan      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Authorized shares of common stock 7,450,000    
Common stock available for grant 1,287,549    
Restricted Or Unrestricted Shares Or Other Stock-Based Awards | 2009 Omnibus Incentive Compensation Plan      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Authorized shares of common stock 5,400,000    
Stock Options      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Unrecognized compensation cost $ 3,800,000    
Expected to be recognized, weighted average period (in years) 1 year 7 months 6 days    
Restricted Stock      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Unrecognized compensation cost $ 21,400,000    
Expected to be recognized, weighted average period (in years) 4 years 8 months 12 days    
Fair value, vested $ 10,400,000 14,600,000 20,500,000
Restricted Stock Units (RSUs)      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Unrecognized compensation cost $ 700,000    
Expected to be recognized, weighted average period (in years) 1 year 4 months 24 days    
Fair value, vested $ 2,400,000 $ 4,400,000 2,700,000
Employees awards, granted 66,000    
Employees awards, outstanding 465,000 623,000  
Performance Stock Units      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Unrecognized compensation cost $ 1,300,000    
Expected to be recognized, weighted average period (in years) 1 year    
Fair value, vested $ 0 $ 0 $ 0
Employees awards, granted 84,000    
Employees awards, outstanding 206,000 135,000  
Cash-settled Restricted Stock Units      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Employees awards, outstanding 13,678    
Cash-settled Restricted Stock Units | Employees In Foreign Country      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Employees awards, granted 5,162    
Cash-settled stock appreciation rights      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Employees awards, granted 0    
Employees awards, outstanding 85,275    
Cash-settled performance units      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Employees awards, granted 0    
Employees awards, outstanding 49,472