LEASES - Supplemental Cash Flow Information Related to Leases (Details) $ in Thousands	6 Months Ended
	Jun. 30, 2019 USD ($)
Cash paid for amounts included in the measurement of lease liabilities:
Operating cash flows from operating leases	$ 1,721
Right-of-use assets obtained in exchange for new operating lease liabilities	$ 14,340
Weighted-average remaining lease term of operating	9 years 8 months 26 days
Weighted-average discount rate of operating leases	5.62%