LEASES - Additional Information (Details) $ in Thousands	3 Months Ended	9 Months Ended
	Sep. 30, 2019 USD ($)	Sep. 30, 2019 USD ($)
Leases [Abstract]
Right-of-Use asset	$ 10,274	$ 10,274
Operating lease liability	11,431	11,431
Operating lease, liability, current	1,944	1,944
Operating lease, liability, noncurrent	9,487	9,487
Operating lease cost	$ 784	$ 2,220
Weighted average remaining lease term (in years)	8 years 11 months 20 days	8 years 11 months 20 days
Weighted average discount rate (as a percent)	5.20%	5.20%