XML 79 R64.htm IDEA: XBRL DOCUMENT v3.20.4
Stock-Based Compensation (Detail) - (Table 6) - USD ($)
 12 Months Ended
Dec. 31, 2020
Dec. 31, 2019
Dec. 31, 2018
Share-based Payment Arrangement [Abstract]      
Proceeds from Stock Options Exercised $ 1,609,000 $ 6,212,000 $ 13,036,000
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 4,427,000 5,137,000 5,876,000
Non-vested at January 1 (in Dollars per share) $ 19.84 $ 18.42 $ 17.37
Granted 561,000 633,000 509,000
Granted (in Dollars per share) $ 30.35 $ 32.64 $ 31.70
Vested (1,189,000) (1,200,000) (1,177,000)
Vested (in Dollars per share) $ 19.96 $ 19.40 $ 18.44
Non-vested at June 30 3,651,000 4,427,000 5,137,000
Non-vested at June 30 (in Dollars per share) $ 20.81 $ 19.84 $ 18.42
Forfeited (148,000) (143,000) (71,000)
Forfeitures (in dollars per share) $ 34.89 $ 28.61 $ 25.61
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period, Intrinsic Value $ 993,000 $ 4,268,000 $ 6,841,000