LEASES - Lease Maturity (Details) - USD ($) $ in Thousands	Mar. 31, 2019	Jan. 01, 2019
Leases [Abstract]
Lessee, Operating Lease, Liability, Payments, Remainder of Fiscal Year	$ 5,361
Lessee, Operating Lease, Liability, Payments, Due Year Two	7,070
Lessee, Operating Lease, Liability, Payments, Due Year Three	6,569
Lessee, Operating Lease, Liability, Payments, Due Year Four	6,238
Lessee, Operating Lease, Liability, Payments, Due Year Five	6,248
Lessee, Operating Lease, Liability, Payments, Due after Year Five	54,378
Lessee, Operating Lease, Liability, Payments, Due	85,864
Lessee, Operating Lease, Liability, Undiscounted Excess Amount	21,255
Operating Lease, Liability	$ 64,609	$ 65,800