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Stockholders' Equity (Tables)
12 Months Ended
Dec. 31, 2022
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]  
Schedule of Share-based Payment Award, Stock Options, Valuation Assumptions
The fair value of the performance awards granted during the year ended December 31, 2022 was calculated on the date of grant using the Monte-Carlo simulation pricing model with the following assumptions:
Grant dateFebruary 23, 2022April 1, 2022
Simulation period (years)2.852.75
Share price at grant date$49.48$52.49
Expected volatility43.99 %44.44 %
Risk-free interest rate1.75 %2.55 %
The fair value of the performance awards granted during the year ended December 31, 2021 was calculated on the date of grant using the Monte-Carlo simulation pricing model with the following assumptions:
Grant dateApril 16, 2021June 1, 2021August 12, 2021September 15, 2021November 29, 2021
Simulation period (years)3.713.583.393.293.09
Share price at grant date$35.83$38.78$39.48$45.27$51.15
Expected volatility41.17 %41.79 %42.85 %43.44 %45.50 %
Risk-free interest rate0.52 %0.46 %0.53 %0.49 %0.85 %
Schedule of Share-based Compensation, Stock Options, Activity tock option grants and cancellations are as follows (in thousands, except shares):
Years Ended December 31,
202020212022
SharesFair ValueSharesFair ValueSharesFair Value
Granted(1)
— $— 701,400 $7,115 58,500 $959 
Granted(2)
— $— — $— 310,000 $5,388 
Granted(3)
— $— 150,000 $1,684 — $— 
Granted(4)
20,000 $92 — $— 12,600 $143 
Cancelled146,034 $846 74,688 $722 45,590 $512 
(1)
Stock options granted during the year ended December 31, 2021 and 2022 had a weighted average price of $34.79 and $49.48, respectively. The fair value of these options was calculated using the Black-Scholes option pricing model. The options granted in 2021 and 2022 vest over a five-year period and have a ten-year term. These options will vest if the employee has remained continuously employed by us through the vesting period.
(2)
Stock options granted during the year ended December 31, 2022 had a weighted average price of $49.48. The fair value of these options was calculated using the Black-Scholes option pricing model and vest over a seven-year period and have a ten-year term. These options will vest if the employee has remained continuously employed by us through the vesting period.
(3)
We granted 150,000 options to a key employee at a weighted average price of $34.79. These options will vest when the price of our common stock closes at or above $53.39 (50,000 options) and $77.34 (100,000 options) for three consecutive days within the ten-year term and the employee has remained continuously employed by us through such date. The fair value of these options was $1.7 million.
(4)
Stock options granted during the year ended December 31, 2020 and 2022 had a weighted average price of $18.02 and $31.58, respectively. The fair value of these options was calculated using the Black-Scholes option pricing model and vest over a three-year period and have a ten-year term. These options will vest if the employee has remained continuously employed by us through the vesting period.
Additional stock option activity is as follows (in thousands, except shares):
Years Ended December 31,
202020212022
SharesCashSharesCashSharesCash
Exercised(1)
40,365 (1)423,294 (1)32,196 (1)
Returned for option price(2)
18,640 $19 211,088 $1,013 18,797 $60 
Returned for payroll taxes(3)
2,954 $89 43,534 $2,272 2,895 $123 
(1)
Stock options exercised during the years ended December 31, 2020, 2021 and 2022 had a weighted average exercise price of $13.72, $21.99 and $25.49, respectively.
(2)Represents shares withheld/cash received for the payment of the option price.
(3)Represents shares withheld/cash paid for the payment of payroll taxes.
A summary of the number of stock options and their weighted average exercise prices during the year ended December 31, 2022 is presented in the table below (shares in thousands): 
SharesWtd. Avg.
Ex. Price
Outstanding at January 11,265 $30.94 
Granted381 $48.89 
Exercised(32)$25.49 
Forfeited or expired(46)$37.34 
Outstanding at December 311,568 $35.23 
Exercisable at December 31592 $27.60 
A summary of the number of stock options and their weighted average grant date fair values during the year ended December 31, 2022 is presented in the table below (shares in thousands): 
SharesWtd. Avg.
Fair Value
Non-vested at January 1839$9.90 
Granted381$17.03 
Vested or exercised(201)$8.86 
Forfeited(43)$11.43 
Non-vested at December 31976$12.83 
A summary of the intrinsic value of stock options exercised and the fair value of stock options vested for the three years ended December 31, 2022 is presented in the table below (in thousands):
Schedule of Share-based Compensation, Shares Authorized under Stock Option Plans, by Exercise Price Range
The following table further describes our outstanding stock options at December 31, 2022:
 Options OutstandingOptions Exercisable
Actual Ranges of Exercise PricesNumber Outstanding at 12/31/22Weighted-Average
Remaining
Contractual Life
Weighted-Average
Exercise Price
Number Exercisable at 12/31/22Weighted-Average
Remaining
Contractual Life
Weighted-Average
Exercise Price
$18.02 - $18.0213,333 2.48$18.02 6,667 2.48$18.02 
$20.06 - $26.54435,535 4.19$24.85 415,569 4.15$24.82 
$31.58 - $31.5812,600 9.75$31.58 — 0.00$— 
$34.79 - $49.881,107,000 8.47$39.56 169,980 8.14$34.79 
$18.02 - $49.481,568,468 7.24$35.23 592,216 5.27$27.60 
Schedule of Share-based Compensation, Restricted Stock and Restricted Stock Units Activity
Restricted stock activity is as follows (in thousands, except shares):
Years Ended December 31,
202020212022
SharesFair ValueSharesFair ValueSharesFair Value
Granted(1)
10,200 $255 9,300 $324 — $— 
Returned for payroll taxes10,588 $250 10,399 $375 4,136 $205 
Cancelled— $— 966 $27 1,950 $63 
(1)
Restricted stock granted during the year ended December 31, 2020 and 2021 will vest over a three-year period, if the employee has remained continuously employed by us during the vesting period, at a weighted average stock price of $25.00 and $34.79, respectively.
Restricted stock awardsSharesWeighted Average
Grant Date
Fair Value
Unvested at January 122,643 $27.21 
Vested(13,111)$24.23 
Cancelled(1,950)$32.28 
Unvested at December 317,582 $31.05 
Schedule of Dividends Payable
Our Board declared the following dividends payable on the dates below (in thousands, except per share amounts):
2022Per ShareDollar Value
March 1st$0.1125 $1,725 
June 1st$0.1125 $1,730 
September 1st$0.1125 $1,653 
December 1st$0.1125 $1,655 
2021Per ShareDollar Value
March 1st$0.1000 $1,799 
June 1st$0.1000 $1,808 
September 1st$0.1000 $1,783 
December 1st$0.1125 $1,873 
Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested and Expected to Vest, Exercisable
Years Ended December 31,
202020212022
Intrinsic value of options exercised$517 $8,229 $580 
Fair value of stock options vested
$735 $1,413 $1,784 
Share-based Payment Arrangement, Activity
Performance award activity is as follows (in thousands, except shares):
Years Ended December 31,
202020212022
SharesFair ValueSharesFair ValueSharesFair Value
Granted30,743 $733 55,302 $2,116 27,013 $1,262 
Cancelled33,538 $631 55,896 $799 30,743 $295 
Common stock issued to certain employees under this incentive program is as follows (in thousands, except shares):
Years Ended December 31,
202020212022
SharesFair ValueSharesFair ValueSharesFair Value
17,991 $449 — $— 27,448 $1,358 
(1)
Common stock granted during the year ended December 31, 2020 and 2022 had a grant date stock price of $25.00 and $49.48, respectively.
Share-based Payment Arrangement, Performance Shares, Outstanding Activity
Performance AwardsSharesWeighted Average
Grant Date
Fair Value
At January 1435,766 $21.76 
Granted 27,013 $46.71 
Cancelled(30,743)$9.59 
At December 31432,036 $20.95 
Non-Employee Director and Board Advisor common stock activity is as follows (in thousands, except shares):
Years Ended December 31,
202020212022
SharesFair ValueSharesFair ValueSharesFair Value
Board of Directors(1)
30,883 $654 14,744 $622 11,155 $415 
Advisor to the Board(1)
967 $20 466 $20 555 $20 
(1)
Common stock granted during the years ended December 31, 2020, 2021 and 2022 had a weighted average price of $21.16, $42.14 and $37.14, respectively.
Schedule of Share-based Compensation, Employee Stock Purchase Plan, Activity
ESPP activity is as follows (in thousands, except shares):
Years Ended December 31,
202020212022
SharesPriceSharesPriceSharesPrice
ESPP71,908 $16.71 61,904 $26.32 52,053 $32.38 
Employee Stock Option  
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]  
Schedule of Share-based Payment Award, Stock Options, Valuation Assumptions
The fair value of the options granted using the Monte-Carlo simulation pricing model was estimated on the date of grant with the following assumptions:
Year ended December 31, 2022
Awards granted150,000
Dividend yield1.15 %
Expected volatility34.08 %
Risk-free interest rate1.29 %
Employee Stock Purchase Plan  
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]  
Schedule of Share-based Payment Award, Stock Options, Valuation Assumptions
The fair values of the right to purchase shares under the ESPP are estimated at the date of purchase with the four quarterly purchase dates using the following assumptions:
Years Ended December 31,
202020212022
Dividend yield1.5 %0.01 %0.01 %
Expected volatility48.6 %48.1 %30.2 %
Risk-free interest rate
1.54%, 1.57%, 1.57%, 1.56%
0.09%, 0.09%, 0.10%,0.10%
0.08%, 0.22%, 0.31%, 0.40%
Expected life (years)
0.25, 0.50, 0.75, 1.00
0.25, 0.50, 0.75, 1.00
0.25, 0.50, 0.75, 1.00