v3.21.2
Stock-Based Compensation (Tables)
9 Months Ended
Sep. 30, 2021
Share-based Payment Arrangement [Abstract]  
Schedule of Stock Option Activity
Stock option activity during the nine months ended September 30, 2021 was as follows:
Number of OptionsWeighted Average Exercise Price
Balance as of January 1, 2021670 $27.43 
Granted— — 
Exercised(297)19.58 
Forfeited— — 
Balance as of September 30, 2021
373 $33.67 
Schedule of Nonvested Restricted Stock Units Activity
Restricted stock unit activity during the nine months ended September 30, 2021 was as follows:
Number of SharesWeighted Average Grant Date Fair Value
Nonvested as of January 1, 20211,757 $70.74 
Granted662 115.71 
Vested(573)61.92 
Forfeited(193)79.28 
Nonvested as of September 30, 2021
1,653 $90.83 
Schedule of Nonvested Market Stock Units Activity
Market stock unit activity during the nine months ended September 30, 2021 was as follows:
Number of SharesWeighted Average Grant Date Fair Value
Nonvested as of January 1, 2021370 $35.67 
Granted101 80.11 
Change in awards based on performance(1)
206 39.67 
Vested(386)33.62 
Forfeited(21)44.67 
Nonvested as of September 30, 2021
270 $57.58 
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(1) Represents the change in the number of MSUs earned based on performance achievement for the performance period.