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Stock-Based Compensation Plans - Schedule of Non-Vested Restricted Stock Activity (Detail) - $ / shares
12 Months Ended
Dec. 31, 2019
Dec. 31, 2018
Dec. 31, 2017
Time Based Restricted Stock [Member]      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Weighted average grant date fair value Non-vested, Beginning balance $ 42.98    
Weighted average grant date fair value, Granted 38.02 $ 47.34 $ 43.31
Weighted average grant date fair value, Vested 42.32    
Weighted average grant date fair value, Forfeited 41.20    
Weighted average grant date fair value Non-vested, Ending balance $ 41.34 $ 42.98  
Shares Non-vested, Beginning balance 963,469    
Shares, Granted 387,841 500,943 428,333
Shares, Vested (318,252)    
Shares, Forfeited (157,566)    
Shares Non-vested, Ending balance 875,492 963,469  
Performance Based Restricted Stock [Member]      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Weighted average grant date fair value Non-vested, Beginning balance $ 49.20    
Weighted average grant date fair value, Granted 37.20    
Weighted average grant date fair value, Forfeited 43.20    
Weighted average grant date fair value Non-vested, Ending balance $ 43.04 $ 49.20  
Shares Non-vested, Beginning balance 73,000    
Shares, Granted 76,500    
Shares, Forfeited (22,000)    
Shares Non-vested, Ending balance 127,500 73,000