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Share-Based Compensation - Additional Information (Detail) - USD ($)
$ / shares in Units, shares in Thousands, $ in Thousands
12 Months Ended
Dec. 31, 2019
Dec. 31, 2018
Dec. 31, 2017
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Total compensation cost related to nonvested awards, unrecognized $ 38,000    
Weighted-average period to recognize compensation cost 2 years    
Aggregate intrinsic value, outstanding $ 132,700 $ 97,800  
Aggregate intrinsic value, vested $ 58,200 41,300  
Weighted-average remaining contractual life for exercisable options and RSUs (in years) 4 years    
Share-based compensation $ 32,050 20,716 $ 16,892
Income tax benefit 8,700 5,600 4,600
Fair value of shares vested 26,200 20,800 $ 15,500
Weighted-average, risk-free interest     2.30%
Weighted-average, dividend yield     2.80%
Weighted-average, annual historical volatility factor     19.00%
Weighted-average, expected life     6 years
Weighted-average grant date fair value of options and SARs granted (in dollars per share)     $ 13.89
Aggregate intrinsic value of options exercised $ 36,200 $ 32,600 $ 16,800
Granted (in shares) 395    
Stock Appreciation Rights (SARs)      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Granted (in shares)     746
Restricted Stock Units      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Granted (in shares) 395 360 171