LEASES - Narrative (Details) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2019	Jan. 01, 2019	Dec. 31, 2017
LEASES
Operating lease right-of-use asset	$ 71,111
Short-term lease liability	9,912
Long-term lease liability	$ 59,663
Cumulative effect adjustment due to adoption of new accounting			$ 2,635
Package of practical expedients	true
Interest cost applicable to financing leases	$ 0
Lease liability applicable to financing leases	$ 0
Discount rate applicable to financing leases	0.00%
Operating lease, existence of option to extend	true
Finance lease, existence of option to extend	true
Minimum
LEASES
Operating lease, lease term	3 years
Finance lease, lease term	3 years
Maximum
LEASES
Operating lease, lease term	10 years
Finance lease, lease term	10 years
Restatement Adjustment | ASC 842
LEASES
Operating lease right-of-use asset		$ 70,800
Short-term lease liability		8,200
Long-term lease liability		61,200
Cumulative effect adjustment due to adoption of new accounting		$ 0