LEASES - Schedule of Maturities of Liabilities Related to Operating Leases and Finance Leases (Details) - USD ($) $ in Thousands	Jun. 30, 2019	Dec. 31, 2018
Leases [Abstract]
Operating Leases Six months ended December 31, 2019	$ 2,625
Operating Leases, 2020	3,480
Operating Leases, 2021	1,209
Operating Leases, 2022	871
Operating Leases, 2023	701
Operating Leases, Thereafter	479
Total operating leases minimum payments	9,365
Less: interest	1,365
Present value of lease liabilities	8,000
Less current lease liabilities operating leases	3,193	$ 0
Long-term lease liabilities operating leases	4,807
Finance Leases Six months ended December 31, 2019	496
Financing Leases, 2020	361
Total finance leases minimum lease payments	857
Less: interest	51
Present value of lease liabilities	806	$ 1,234
Less current lease liabilities of finance leases	$ 806