Quarterly report pursuant to Section 13 or 15(d)

Stock Compensation - Summary of Stock-Based Instruments (Detail)

v3.21.1
Stock Compensation - Summary of Stock-Based Instruments (Detail) - $ / shares
3 Months Ended
Mar. 31, 2021
Mar. 31, 2020
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Granted, shares 623,750  
Weighted-Average Grant-Date Fair Value, shares $ 42.01  
Restricted Stock [Member]    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Granted, shares 406,250 1,013,500
Weighted-Average Grant-Date Fair Value, shares $ 39.53 $ 36.96
Performance-Based Restricted Stock [Member]    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Granted, shares 108,750  
Weighted-Average Grant-Date Fair Value, shares $ 38.95  
Market-Based Restricted Stock [Member]    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Granted, shares 108,750  
Weighted-Average Grant-Date Fair Value, shares $ 54.34