STOCK-BASED COMPENSATION - ACTIVITY OF STOCK OPTIONS (Details) - LTIP - Stock options - USD ($) $ / shares in Units, $ in Thousands	9 Months Ended	12 Months Ended
	Sep. 30, 2020	Dec. 31, 2019
Stock Options
Outstanding, beginning of year (in shares)	100,714
Granted (in shares)	0
Exercised (in shares)	0
Forfeited (in shares)	(28,346)
Outstanding, end of quarter (in shares)	72,368	100,714
Number of options outstanding and exercisable (in shares)	72,368
Weighted-Average Exercise Price
Outstanding, beginning of year (in dollars per share)	$ 34.36
Granted (in dollars per share)	0
Exercised (in dollars per share)	0
Forfeited (in dollars per share)	34.36
Outstanding, end of quarter (in dollars per share)	34.36	$ 34.36
Number of options outstanding and exercisable (in dollars per share)	$ 34.36
Additional Information
Weighted-Average Remaining Contractual Term (in years)	6 years 7 months 6 days
Number of options outstanding and exercisable, Weighted-Average Remaining Contractual Term (in years)	6 years 7 months 6 days
Aggregate Intrinsic Value (in thousands)	$ 0
Number of options outstanding and exercisable, Aggregate Intrinsic Value (in thousands)	$ 0