EMPLOYEE STOCK COMPENSATION - Summary of SARs Activity (Details) - Stock appreciation rights - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended		6 Months Ended	12 Months Ended
	Jun. 30, 2020	Mar. 31, 2020	Jun. 30, 2020	Dec. 31, 2019
Number of Shares
Outstanding at beginning of period (in shares)	1,559,012	1,559,012	1,559,012
Outstanding at end of period (in shares)	1,559,012	1,559,012	1,559,012	1,559,012
Exercisable at end of period (in shares)	1,559,012		1,559,012
Weighted-Average Exercise Price Per Share
Outstanding at beginning of period (in dollars per share)	$ 11.60	$ 11.60	$ 11.60
Outstanding at end of period (in dollars per share)	11.60	$ 11.60	11.60	$ 11.60
Exercisable at end of period (in dollars per share)	$ 11.60		$ 11.60
Weighted-Average Remaining Contract Term
Outstanding	2 years 1 month 6 days	2 years 4 months 24 days	2 years 1 month 6 days	2 years 7 months 6 days
Exercisable at end of period	2 years 1 month 6 days		2 years 1 month 6 days
Aggregated Intrinsic Value
Outstanding	$ (1,812)	$ (5,616)	$ (1,812)	$ 8,508
Exercisable at end of period	$ (1,812)		$ (1,812)