LEASES - Lease Costs & Additional Lease Information (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019
Leases [Abstract]
Operating lease cost	$ 945	$ 833	$ 1,790	$ 1,667
Variable lease cost	0	0	0	0
Sublease income	(1,073)	(633)	(1,941)	(1,258)
Lease income	$ (128)		$ (151)
Lease cost		$ 200		$ 409
Weighted-average remaining lease term - operating leases (in years)	10 years 7 months 6 days		10 years 7 months 6 days
Weighted-average discount rate - operating leases (as a percent)	3.23%		3.23%