XML 49 R36.htm IDEA: XBRL DOCUMENT v3.22.0.1
Stock-Based Compensation (Tables)
 12 Months Ended
Dec. 31, 2021
Share-based Payment Arrangement [Abstract]  
Schedule of Share-based Payment Award, Employee Stock Purchase Plan, Valuation Assumptions The fair value of each stock option award granted during the years ended December 31, 2020 and 2019 was estimated as of the grant date using a trinomial lattice model. Weighted average assumptions used during the years ended December 31, 2021, 2020, and 2019 are as follows:
 202120202019
Expected term (in years)
1.2 – 5.5
3.8 – 5.5
3.0 – 5.5
Risk-free interest rate (%)0.7 %0.7 %2.4 %
Expected volatility (%)45.1 %42.7 %43.2 %
Dividend yield (%)— — — 
Weighted average fair value/share at grant date$18.87 $8.88 $5.77 
Share-based Compensation, Stock Options, Activity
The status of the stock options are summarized as follows:
 
Number
of Shares
Weighted
Average Exercise
Price
Outstanding at December 31, 2018
6,839,417 $7.63 
     Granted969,720 19.70 
     Exercised(2,309,451)6.83 
     Forfeited(180,927)13.34 
Outstanding at December 31, 2019
5,318,759 9.97 
     Granted845,120 28.33 
     Exercised(2,310,934)7.96 
     Forfeited(67,004)16.37 
Outstanding at December 31, 2020
3,785,941 15.21 
     Granted1,232,056 42.13 
     Exercised(1,372,564)9.97 
     Forfeited(684,238)29.70 
Outstanding at December 31, 2021
2,961,195 25.46 
Exercisable at December 31, 2021
1,668,356 15.29 
Schedule of Nonvested Share Activity
The number and weighted average grant-date fair values of options non-vested at the beginning and end of 2021, as well as options granted, vested, and forfeited during the year were as follows:
 
Number of Options
Weighted Average
Grant Date Fair Value
Non-vested at December 31, 2020
2,163,809 $6.07 
     Granted1,232,056 18.87 
     Vested(1,421,042)8.17 
     Forfeited(681,984)9.58 
Non-vested at December 31, 2021
1,292,839 13.93 
Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested and Expected to Vest, Outstanding and Exercisable
The following table summarizes information about the options outstanding at December 31, 2021:
 
 Options OutstandingOptions Exercisable
Range of
Exercise
Prices ($)
Number
Outstanding
Weighted
Average
Remaining
Contractual
Life (Years)
Weighted
Average
Exercise
Price
Number
Exercisable
Weighted
Average
Remaining
Contractual
Life (Years)
Weighted
Average
Exercise
Price
7.27 – 8.21
638,040 0.95$7.86 638,040 0.95$7.86 
8.22 – 19.76
701,148 1.8915.53 618,439 1.8015.07 
19.77 – 27.97
359,217 4.8524.22 112,799 4.6823.30 
27.98 – 43.49
612,500 5.5931.47 298,980 5.1928.57 
43.50 – 55.40
650,290 6.3348.46 98 5.9955.40 
 2,961,195 3.7925.46 1,668,356 2.2815.29 
Schedule of Share-based Compensation, Restricted Stock Units Award Activity
The number of shares and weighted average grant date fair values of restricted non-vested common stock at the beginning and end of 2021, 2020, and 2019, as well as stock awards granted, vested, and forfeited during the year were as follows:
Number of
Restricted
Shares
Weighted Average
Grant Date
Fair Value
Nonvested at December 31, 2018
282,508 $9.01 
     Granted230,980 19.93 
     Vested(115,711)9.36 
     Forfeited(62,479)12.53 
Nonvested at December 31, 2019
335,298 15.75 
     Granted149,012 28.45 
     Vested(184,127)12.90 
     Forfeited(8,292)20.75 
Nonvested at December 31, 2020
291,891 23.82 
     Granted936,648 39.52 
     Vested(213,777)32.83 
     Forfeited(163,359)38.58 
Nonvested at December 31, 2021
851,403 36.00