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Stock-Based Compensation (Tables)
 12 Months Ended
Dec. 31, 2021
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]  
Summarized information about stock options outstanding
Summarized information about stock options outstanding at December 31, 2021 under the 2012 Incentive Plan and the 2019 Incentive Plan (collectively, the “LTIPs”) is as follows.
Number of
options
(in thousands)
Weighted
average
exercise price
Options outstanding at December 31, 20202,473 $23.08 
Options granted— $— 
Options exercised(1,368)$25.37 
Options forfeited(37)$18.72 
Options expired(465)$16.90 
Options outstanding at December 31, 2021603 $22.92 
Summarized information about outstanding and exercisable stock option
Options outstanding at
December 31, 2021		Options exercisable at
December 31, 2021
Range of exercise prices
Shares
outstanding (in thousands)
Weighted
average
remaining
contractual
life		Weighted
average
exercise
price
Shares
exercisable (in thousands)
Weighted
average
exercise
price
$14.48 - $15.40
240 3.66$14.80 82 $14.80 
$26.86 - $29.68
363 1.59$28.28 363 $28.28 
Summary of the non-vested restricted stock and restricted stock units
A summary of the non-vested equity-based restricted stock and restricted stock units as of December 31, 2021 is presented below (in thousands, except fair value).
 Restricted StockRestricted Stock Units
Service Based Service Based Performance Based
Non-vested restricted stock and
restricted stock units		SharesWeighted
average
fair
value		SharesWeighted
average
fair
value		SharesWeighted
average
fair
value
Non-vested at December 31, 2020682 $20.01 75 $8.85 1,069 $9.05 
Granted283 $37.56 36 $30.97 366 $50.53 
Vested(1)
(334)$27.14 (78)$9.02 (397)$20.00 
Forfeited(42)$17.35 — $— (75)$9.33 
Non-vested at December 31, 2021589 $24.59 33 $33.39 963 $20.26 
__________________    
(1)On December 31, 2021, 396,827 of the performance-based awards that were granted in 2019 vested. The vested units earned 200% for each vested award representing 793,654 aggregate shares of common stock, which were issued on December 31, 2021.
2012 Incentive Plan  
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]  
Weighted average assumptions used to estimate fair value of stock options granted under the Stock and Incentive Plan
The weighted average grant date fair value for stock option awards granted under the 2019 Incentive Plan was estimated using the following weighted average assumptions during the year ended December 31, 2019. The Company did not grant stock option awards during the years ended December 31, 2021 and 2020.
2019
Stock option pricing modelBlack Scholes Merton
Expected option life4.00 years
Risk-free interest rate1.46%
Volatility48.52%
Dividend yield—%
Estimated forfeiture rate4.43%
Weighted average fair value of stock option awards granted during the year$5.04