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Stock-Based Compensation (Detail) - (Table 6) - $ / shares
 6 Months Ended
Jun. 30, 2022
Jun. 30, 2021
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value [Roll Forward]    
Non-vested at January 1 2,849,000 3,651,000
Non-vested at January 1 (in Dollars per share) $ 23.80 $ 20.81
Granted 395,000 297,000
Granted (in Dollars per share) $ 41.26 $ 38.65
Vested (266,000) (296,000)
Vested (in Dollars per share) $ 32.50 $ 27.93
Forfeited (15,000) (22,000)
Non-vested at March 31 2,963,000 3,630,000
Non-vested at March 31 (in Dollars per share) $ 25.30 $ 21.60
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Forfeitures, Weighted Average Grant Date Fair Value $ 33.18 $ 35.82