LEASES - Operating and Finance Leases - Future Minimum Lease Payments (Details) - USD ($) $ in Thousands	Sep. 30, 2019	Dec. 31, 2018
Lessee, Operating Lease, Liability, Payment, Due [Abstract]
2019 (excluding the nine months ended September 30, 2019)	$ 5,731
2020	20,033
2021	14,773
2022	12,004
2023	9,730
Thereafter	25,348
Total future minimum lease payments	87,619
Less: Interest	(18,348)
Present value of lease liabilities	69,271
Operating Leases, Future Minimum Payments Due, Fiscal Year Maturity [Abstract]
2019		$ 23,315
2020		16,858
2021		12,577
2022		9,873
2023		7,846
Thereafter		23,224
Total minimum lease payments		93,693
Finance Lease, Liability, Payment, Due [Abstract]
2019 (excluding the nine months ended September 30, 2019)	146	583
2020	584	500
2021	588	504
2022	592	524
2023	542	525
Thereafter	5,640	5,631
Total future minimum lease payments	8,092	8,267
Less: Interest	(2,703)	(2,911)
Present value of lease liabilities	$ 5,389	$ 5,356