LEASES - Future Non-cancellable Minimum Lease Payments (Details) $ in Thousands	Sep. 30, 2019 USD ($)
Operating Leases
2019	$ 909
2020	5,875
2021	8,748
2022	8,288
2023	6,835
Thereafter	37,585
Total future minimum lease payments	68,240
Less: Interest	(15,177)
Total	53,063
Right-of-use assets obtained in exchange for lease liabilities:
2019	738
2020	2,937
2021	2,381
2022	1,185
2023	1,275
Thereafter	8,816
Total future minimum lease payments	17,332
Less: Interest	(1,907)
Total	$ 15,425