LEASES (Details) - USD ($) Unit_Standard_pure_26eO2cejkk6pPAyr1w5sGQ in Thousands, $ in Thousands	6 Months Ended
	Jun. 30, 2019	Jan. 01, 2019	Jun. 30, 2018
LEASES
Operating lease right-of-use asset	$ 68,587
Short-term lease liability	10,021
Long-term lease liability	$ 58,748
Cumulative effect adjustment due to adoption of new accounting			$ 2,636
Package of practical expedients	true
Hindsight practical expedient	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