LEASES - Maturity of Lease Liabilities (Details) - USD ($) $ in Thousands	Jun. 30, 2019	Mar. 31, 2019	Jan. 01, 2019
Leases [Abstract]
2019 (excluding 6 months ended 6/30/2019)	$ 11,577
2020	20,123
2021	16,813
2022	12,630
2023	7,580
Thereafter	13,464
Total lease payments	82,187
Less: imputed interest	13,112
Present value of lease liabilities	69,075	$ 70,654	$ 72,416
Minimum lease payments for leases signed but not yet commenced	$ 1,300