STOCK-BASED COMPENSATION - SARs and Options (Details) - Stock Options and Stock Appreciation Rights - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Shares
Outstanding, beginning balance (shares)	10,689
Granted (shares)	0	0	0
Exercised (shares)	(9,050)
Forfeited (shares)	(17)
Expired (shares)	(13)
Outstanding, ending balance (shares)	1,609	10,689
Weighted Average Exercise Price
Outstanding, weighted average exercise price beginning balance (USD per share)	$ 4.67
Granted (USD per share)	0
Exercised (USD per share)	4.19
Forfeited (USD per share)	6.58
Expired (USD per share)	10.64
Outstanding, weighted average exercise price ending balance (USD per share)	$ 7.32	$ 4.67
Outstanding, Weighted average remaining contractual life (in years)	3 years 10 months 2 days
Outstanding, Aggregate intrinsic value (in USD)	$ 5,954
Exercisable, number exercisable at end of period (in shares)	1,609
Exercisable, weighted average exercise price at end of period (USD per share)	$ 7.32
Exercisable, weighted average remaining contractual life (in years)	3 years 10 months 2 days
Exercisable, aggregate intrinsic value at end of period (in USD)	$ 5,954