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Share-Based Compensation - Additional Information (Detail) - USD ($)
$ in Millions
12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
Dec. 31, 2018
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]        
Shares issuable upon exercise of outstanding options 995,091 1,227,074 2,437,609 2,818,433
Estimated pretax compensation expense $ 13.0      
Expiration period in years 4 years      
Restricted stock units settled in shares exercisable in percentage 25.00%      
Deferred stock units outstanding 73,000      
Non-Employee Directors' Stock Options [Member]        
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]        
Expiration period in years 10 years      
Employee stock options exercisable in percentage 100.00%      
Employee Stock Option [Member]        
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]        
Expiration period in years 10 years      
Service period in years 4 years      
Employee Stock Option [Member] | Share-based Compensation Award, Tranche One [Member]        
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]        
Stock awards settled in stock exercisable in percentage 25.00%      
Restricted Stock Units [Member]        
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]        
Number of shares to reduce shares available to grant by upon vesting of restricted stock awards and units 1,463,193 2,146,050 1,921,192 2,017,477
Service period in years 4 years      
Performance-based Restricted Stock Units [Member]        
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]        
Service period in years 3 years      
2016 Incentive Compensation Plan [Member]        
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]        
Common stock subject to awards of stock options or stock appreciation rights payable in shares 1.0      
Common stock subject to any other form of award 1.35      
Common stock available for future share-based awards 7,000,000.0      
Shares issuable upon exercise of outstanding options 600,000      
Number of shares to reduce shares available to grant by upon vesting of restricted stock awards and units 2,000,000.0      
2008 Incentive Compensation Plan [Member]        
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]        
Shares issuable upon exercise of outstanding options 400,000      
Number of shares to reduce shares available to grant by upon vesting of restricted stock awards and units 100,000