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STOCK-BASED COMPENSATION (Tables)
 12 Months Ended
Dec. 31, 2021
Share-based Payment Arrangement [Abstract]  
Schedule of Changes in Outstanding Stock Options and Stock Appreciation Rights
Stock options and stock appreciation rights outstanding at December 31, 2021 and changes during the year ended December 31, 2021 were as follows:
December 31, 2021
Shares
Weighted Average
Exercise Price
Weighted Average
Remaining
Contractual Term (In Years)
Aggregate
Intrinsic Value
(Shares and intrinsic value in thousands)
Outstanding at January 1, 202110,689 $4.67 
Granted— — 
Exercised(9,050)4.19 
Forfeited(17)6.58 
Expired(13)10.64 
Outstanding at December 31, 20211,609 $7.32 3.84$5,954 
Exercisable1,609 $7.32 3.84$5,954 
Schedule of Information for Stock Options and Stock Appreciation Rights Outstanding and Exercisable
The following table summarizes the information about stock options and stock appreciation rights outstanding and exercisable at December 31, 2021:
Awards outstanding & exercisable
Range of Exercise PricesOutstanding
at
December 31,
2021		Weighted average
remaining
contractual
life in years		Weighted
average
exercise
price
(Shares in thousands)
$0.01 to $10.00
1,086 3.9$3.80 
$10.01 to $20.00
508 3.814.41 
$20.01 to $30.00
15 1.622.02 
1,609 3.8$7.32 
Schedule of Outstanding Unvested Equity Units
Unvested RSUs, MSUs, and PSUs outstanding at December 31, 2021 and changes during the year ended December 31, 2021 are as follows:

RSUsMSUsPSUs
Number of SharesWeighted Average
 Grant Date
 Fair Value
Number of Shares (a)
Weighted Average
 Grant Date
 Fair Value
Number of Shares (a)
Weighted Average
 Grant Date
 Fair Value
(Shares in thousands)
Unvested at January 1, 20219,560 $10.19 2,496 $7.82 1,958 $5.11 
Granted11,670 12.73 3,328 14.39 696 13.51 
Vested(2,424)12.78 (153)6.81 (369)5.11 
Forfeited(5,510)11.28 (1,960)6.85 (1,111)6.37 
Unvested at December 31, 202113,296 $11.49 3,711 $14.27 1,174 $8.89 
___________________________
(a)    Included in the table are MSUs and PSUs which vests in varying amounts depending upon certain market or performance conditions. The MSUs and PSUs in the table above includes these awards at their maximum potential payout.