Quarterly report pursuant to Section 13 or 15(d)

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

v3.21.2
Stock Compensation - Summary of Stock-Based Instruments (Detail) - $ / shares
9 Months Ended
Sep. 30, 2021
Sep. 30, 2020
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Granted, shares 916,800  
Weighted-Average Grant-Date Fair Value, shares $ 44.17  
Restricted Stock [Member]    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Granted, shares 699,300 1,069,300
Weighted-Average Grant-Date Fair Value, shares $ 43.40 $ 36.52
Performance-Based Restricted Stock [Member]    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Granted, shares 108,750 0
Weighted-Average Grant-Date Fair Value, shares $ 38.95 $ 0
Market-Based Restricted Stock [Member]    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Granted, shares 108,750 0
Weighted-Average Grant-Date Fair Value, shares $ 54.34 $ 0