LEASES - Lease Cost (Details) - USD ($) $ in Thousands	3 Months Ended	9 Months Ended
	Sep. 30, 2019	Sep. 30, 2019	Sep. 30, 2018
Leases [Abstract]
Operating Lease, Cost	$ 1,627	$ 4,883
Variable Lease, Cost	699	1,950
Sublease Income	(11)	(33)
Lease, Cost	2,315	6,800
Cash flows from operating leases	$ (1,558)	$ (4,663)	$ 0
Operating Lease, Weighted Average Remaining Lease Term	13 years 9 months 18 days	13 years 9 months 18 days
Operating Lease, Weighted Average Discount Rate, Percent	3.92%	3.92%