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Share-Based Compensation (Tables)
 12 Months Ended
Dec. 31, 2021
Share-based Payment Arrangement, Noncash Expense [Abstract]  
Schedule of unrecognized compensation expense Our unrecognized compensation expense related to our share-based awards was as follows as of December 31, 2021:
Unrecognized Compensation ExpenseWeighted Average Remaining Recognition Period
(In thousands)
Restricted stock awards$— 0
Restricted stock units$6,911 1.49
Performance stock units$4,332 1.09
Schedule of option activity
Non-qualified option activities for the year ended December 31, 2021 are as follows:
 OptionsWeighted Average Exercise Price
Aggregate
Intrinsic
Value(1)
Weighted Average Remaining Contractual Term
 (In thousands) (In thousands)
Outstanding at December 31, 2020348 $30.49 
Granted— — 
Exercised(192)33.26 
Forfeited— — 
Expired(15)36.49 
Outstanding and exercisable at December 31, 2021141 $26.09 $2,870 1.66
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(1)The intrinsic value of a stock option is the amount by which the market value of the underlying stock exceeds the exercise price of the option as of December 31, 2021.
Summary of additional information regarding outstanding and exercisable options
Years Ended December 31,
202120202019
(In thousands)
Options exercised192 3 116 
Total intrinsic value of options exercised$2,518 $— $623 
Schedule of non-vested restricted stock awards, restricted share units
The following table represents the non-vested restricted stock awards and restricted stock units granted, vested, and forfeited during 2021. 
Restricted Stock Awards Restricted Stock Units
 SharesWeighted-
average
Grant-date
Fair Value		SharesWeighted-
average
Grant-date
Fair Value
 (In thousands) (In thousands) 
Non-vested shares at December 31, 202073 $45.13 445 $17.34 
Granted20 39.82 185 39.77 
Vested(93)43.98 (180)21.68 
Forfeited— — (4)36.05 
Non-vested shares at December 31, 2021— $— 446 $24.28 
Schedule of non-vested performance-based units activity
The following table represents the non-vested performance share units granted, vested, and forfeited during 2021.
 SharesWeighted-
average
Grant-date
Fair Value
Aggregate
Intrinsic
Value(1)
Weighted Average Remaining Contractual Term
 (In thousands)(In thousands)
Non-vested shares at December 31, 2020548 $23.25 
Granted(2)
132 45.34 
Vested(87)28.94 
Forfeited(43)61.30 
Non-vested shares at December 31, 2021550 $24.66 $25,494 1.09
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(1)The intrinsic value of a performance share unit is the amount by which the market value of the underlying performance share unit exceeds the grant date value of the performance share unit as of December 31, 2021.
(2)Shares granted during fiscal 2021 include 43,358 additional shares awarded for the final 200% achievement of the 2018 Performance Share Program, which was certified in the first quarter of fiscal 2021. The remaining 88,792 granted shares were for the 2021 Performance Share Program.
Summary of weighted-average assumptions for performance shares pricing The weighted average fair value using a Monte Carlo simulation model and the corresponding weighted average assumptions for the performance share units granted were as follows:
 202120202019
Risk-free interest rate0.25 %0.84 %2.51 %
Expected dividend yield— %— %— %
Expected volatility82.6 %50.9 %32.2 %
Fair value per performance share award$66.87 $6.46 $60.68