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SHARE-BASED AWARDS AND STOCK OPTIONS (Tables)
3 Months Ended
Mar. 31, 2022
Share-based Payment Arrangement [Abstract]  
Schedule of Share-based Compensation Expense
The following table summarizes share-based compensation expense and the related income tax benefit recognized for our share-based awards and stock options:
Three Months Ended
March 31, 2022March 31, 2021
(in thousands)
Share-based compensation expense$38,399 $37,165 
Income tax benefit$9,679 $8,399 
Schedule of Changes in Unvested Restricted Stock Awards and Performance Units
The following table summarizes the changes in unvested restricted stock and performance awards for the three months ended March 31, 2022:
SharesWeighted-Average
Grant-Date
Fair Value
(in thousands)
Unvested at December 31, 20211,640 $184.90 
Granted1,428 138.21 
Vested(535)174.51 
Forfeited(22)167.59 
Unvested at March 31, 20222,511 $160.68 
Schedule of Changes in Stock Option Activity
The following table summarizes stock option activity for the three months ended March 31, 2022: 
OptionsWeighted-Average Exercise PriceWeighted-Average Remaining Contractual TermAggregate Intrinsic Value
(in thousands)(years)(in millions)
Outstanding at December 31, 20211,172 $107.44 5.8$47.4
Granted154 136.02 
Exercised(4)16.89 
Outstanding at March 31, 20221,322 $111.06 5.9$48.5
Options vested and exercisable at March 31, 20221,053 $97.96 5.1$48.4
Schedule of Fair Valuation Assumptions Fair value was estimated on the date of grant using the Black-Scholes valuation model with the following weighted-average assumptions:
Three Months Ended
March 31, 2022March 31, 2021
Risk-free interest rate1.87%0.59%
Expected volatility40%40%
Dividend yield0.56%0.44%
Expected term (years)55