LEASES - Maturities after Adoption of 842 (Details) - USD ($) $ in Thousands	Sep. 30, 2019	Jan. 01, 2019
Leases [Abstract]
Remainder of 2019	$ 3,402
2020	21,061
2021	18,800
2022	17,642
2023 and thereafter	21,375
Total lease payments	82,280
Less: imputed interest	(9,634)
Total short and long-term lease liabilities	$ 72,646	$ 54,200