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Stockholders' Equity Stockholders' Equity (Tables)
12 Months Ended
Dec. 31, 2021
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]  
Schedule of Share-based Payment Award, Stock Options, Valuation Assumptions
The following table reflects the new performance awards granted during the year ended December 31, 2021, their respective fair values and the assumptions utilized in the Monte-Carlo simulation pricing model:
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
Additional stock option activity is as follows (in thousands, except shares):
Year Ended December 31,
20202021
SharesFair ValueSharesFair Value
Granted(1)
20,000 $92 701,400 $7,115 
Cancelled146,034 $846 74,688 $722 

(1)
Stock options granted during the years ended December 31, 2020 and 2021 had a weighted average price of $18.02 and $34.79, respectively. The fair value of these options was calculated using the Black-Scholes option pricing model. The options granted in 2020 vest over a three-year period and have a ten-year term. The options granted in 2021 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.
Year Ended December 31,
20202021
SharesCashSharesCash
Exercised(1)
40,365 N/A423,294 N/A
Returned for option price(2)
18,640 $19 211,088 $1,013 
Returned for payroll taxes(3)
2,954 $89 43,534 $2,272 
A summary of the stock options at and changes during the three years ended December 31, 2021 is presented in the table below (shares in thousands): 
 Years Ended December 31,
 201920202021
SharesWtd. Avg.
Ex. Price
SharesWtd. Avg.
Ex. Price
SharesWtd. Avg.
Ex. Price
Outstanding at January 11,523 $21.95 1,078 $23.22 912 $23.40 
Granted100 $24.35 20 $18.02 851 $34.79 
Exercised(247)$17.37 (40)$13.72 (423)$21.99 
Cancelled or expired(298)$21.96 (146)$23.97 (75)$33.56 
Outstanding at December 311,078 $23.22 912 $23.40 1,265 $30.94 
Exercisable at December 31643 $22.02 668 $22.90 426 $25.71 
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, 2021 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, 2021:
 Options OutstandingOptions Exercisable
Actual Ranges of Exercise PricesNumber Outstanding at 12/31/21Weighted-Average
Remaining
Contractual Life
Weighted-Average
Exercise Price
Number Exercisable at 12/31/21Weighted-Average
Remaining
Contractual Life
Weighted-Average
Exercise Price
$18.02 - $18.0213,333 3.48$18.02 — — $— 
$20.06 - $26.54464,921 5.18$24.80 375,793 5.07$24.51 
$34.79 - $34.79786,900 9.14$34.79 50,000 9.14$34.79 
$18.02 - $34.791,265,154 7.63$30.94 425,793 5.55$25.71 
Schedule of Share-based Compensation, Restricted Stock and Restricted Stock Units Activity
Restricted stock activity is as follows (in thousands, except shares):
Year Ended December 31,
20202021
SharesFair ValueSharesFair Value
Granted(1)
10,200 $255 9,300 $324 
Returned for payroll taxes10,588 $250 10,399 $375 
Cancelled— $— 966 $27 
(1)
Restricted stock granted during the years 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.
A summary of the status of unvested restricted stock as of December 31, 2021, and changes during 2021, is presented below: 
Restricted stock awardsSharesWeighted Average
Grant Date
Fair Value
Unvested at January 1, 202145,130 $23.34 
Granted 9,300 34.79 
Vested(30,821)23.81 
Cancelled(966)28.18 
Unvested at December 31, 202122,643 $27.21 
Schedule of Dividends Payable
Our Board declared the following dividends payable on the dates below (in thousands, except per share amounts):
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 
2020Per ShareDollar Value
March 1st$0.0750 $1,339 
June 1st$0.0750 $1,343 
September 1st$0.0875 $1,569 
December 1st$0.1000 $1,797 
Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested and Expected to Vest, Exercisable
Years Ended December 31,
201920202021
Intrinsic value of options exercised$1,197 $517 $8,229 
Fair value of stock options vested
$853 $735 $1,413 
Share-based Payment Arrangement, Activity
Additional performance award activity is as follows (in thousands, except shares):
Years Ended December 31,
20202021
SharesFair ValueSharesFair Value
Granted30,743 $733 55,302 $2,116 
Cancelled33,538 $631 55,896 $799 
Share-based Payment Arrangement, Performance Shares, Outstanding Activity
A summary of the new performance award and changes during the year ended December 31, 2021 is presented in the table and below:
Performance AwardsSharesWeighted Average
Grant Date
Fair Value
At January 1, 2021366,124 $10.89 
Granted 55,302 38.27 
Amended70,236 36.36 
Cancelled(55,896)14.29 
At December 31, 2021435,766 $21.76 
Non-Employee Director and Board Advisor common stock activity is as follows (in thousands, except shares):
Years Ended December 31,
201920202021
SharesFair ValueSharesFair ValueSharesFair Value
Board of Directors7,458 $155 30,883 $654 14,744 $622 
Advisor to the Board— $— 967 $20 466 $20 
(1)
Common stock granted during the years ended December 31, 2019, 2020 and 2021 had a weighted average price of $20.78, $21.16 and $42.14, respectively.
Schedule of Share-based Compensation, Employee Stock Purchase Plan, Activity
ESPP activity is as follows (in thousands, except shares):
Years Ended December 31,
201920202021
SharesPriceSharesPriceSharesPrice
ESPP73,731 $13.18 71,908 $16.71 61,904 $26.32 
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, 2021
Awards granted150,000
Dividend yield1.15 %
Expected volatility34.08 %
Risk-free interest rate1.29 %
The fair value of the options granted using the Black-Scholes option pricing model was estimated on the date of grant with the following assumptions:
Years Ended December 31,
201920202021
Awards granted100,00020,000701,400
Dividend yield1.23 %1.67 %1.15 %
Expected volatility27.45 %38.54 %36.72 %
Risk-free interest rate1.65 %0.25 %0.57 %
Expected holding period (years)5.03.75.0
Black-Scholes value$5.70$4.61$10.14
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,
201920202021
Dividend yield1.4 %1.5 %0.01 %
Expected volatility36.1 %48.6 %48.1 %
Risk-free interest rate
2.42%, 2.51%, 2.56%, 2.60%
1.54%, 1.57%, 1.57%,1.56%
0.09%, 0.09%, 0.10%, 0.10%
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