LEASES - Components of Lease Cost and Other Operating Lease Information (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Leases [Abstract]
Operating Lease, Cost	$ 7,852	$ 9,765
Short-term Lease, Cost	29	96
Variable Lease, Cost	1,576	1,848
Operating Lease, Payments	8,067	10,925
Right-of-Use Asset Obtained in Exchange for Operating Lease Liability	5,683	17,947
Derecognition of right-of-use assets	$ 701	$ 16,855
Operating Lease, Weighted Average Remaining Lease Term	5 years 5 months 15 days	5 years 10 months 9 days
Operating Lease, Weighted Average Discount Rate, Percent	7.00%	8.00%