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Stock-Based Compensation (Tables)
12 Months Ended
Dec. 31, 2023
Share-Based Payment Arrangement [Abstract]  
Share-Based Compensation Expense By Type [Table Text Block]
Share-based compensation expense (income) was as follows:
Year Ended December 31,
202320222021
PUs$3,755 $248 $(916)
RSUs3,272 1,738 4,201 
Stock options691 1,273 2,289 
Total$7,718 $3,259 $5,574 
Schedule of Share-based Compensation, Stock Options, Activity
Stock option transactions and related information for the year ended December 31, 2023 was as follows:
OptionsWeighted Average Exercise PriceWeighted Average Remaining Contractual Life (Years)Aggregate Intrinsic Value
Outstanding as of January 1, 2023785,844 $59.41 
Forfeited(2,629)$37.28 
Expired(99,271)$55.23 
Outstanding as of December 31, 2023683,944 $58.16 3.6$— 
Exercisable as of December 31, 2023645,572 $59.51 3.4$— 
Schedule of Share-based Payment Award, Stock Options, Valuation Assumptions The fair value of each stock option was estimated using the following assumptions:
2021
Expected volatility48.65% - 50.50%
Dividend yield0.00 %
Expected option life - years6.0
Risk-free rate0.6% - 0.9%
Schedule of Share-based Compensation, Restricted Stock and Restricted Stock Units Activity
Restricted stock and restricted stock units transactions and related information for the year ended December 31, 2023 was as follows:
Restricted Stock and Restricted UnitsWeighted Average Grant Date Fair Value
Non-vested as of January 1, 2023389,036 $11.98 
Granted308,612 $16.11 
Vested(260,790)$6.30 
Forfeited(27,624)$19.40 
Non-vested as of December 31, 2023409,234 $23.06 
Schedule of Nonvested Performance-based Units Activity [Table Text Block]
A summary of activity for performance-vested restricted stock units transactions and related information for the year ended December 31, 2023 was as follows:
Stock Settled Performance UnitsCash Settled Performance UnitsWeighted Average Grant Date Fair Value
Non-vested as of January 1, 2023195,657 83,816 $18.50 
Granted— 324,604 $19.54 
Vested at 0% payout(64,099)(83,816)$22.50 
Forfeited(10,434)(27,468)$15.88 
Non-vested as of December 31, 2023121,124 297,136 $15.69 
Schedule of Share-based Payment Award, TSRs, Valuation Assumptions [Table Text Block] The fair value of the performance units were estimated using the following assumptions:
20232022
Expected volatility100.42 %88.24 %
Dividend yield0.00 %0.00 %
Risk-free rate4.60 %1.71 %