LEASES - Lease Cost (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Lease, Cost [Abstract]
Operating Lease, Cost	$ 1,972	$ 1,846	$ 5,973	$ 5,494
Short-term Lease, Cost	30	14	111	15
Variable Lease, Cost	632	688	1,899	1,918
Lease, Cost	$ 2,634	$ 2,548	$ 7,983	$ 7,427