LEASES (Narrative) (Details) $ in Thousands	3 Months Ended
	Mar. 31, 2019 USD ($)
Lessee, Lease, Description [Line Items]
Existence of material residual value guarantees	false
Existence of material restrictive covenants	There were no lease agreements that contained material restrictive covenants
Existance of lease agreements signed with related parties	There were no lease agreements signed with related parties
Commitments related to operating lease agreements that have not yet commenced	$ 57,716
Minimum
Lessee, Lease, Description [Line Items]
Remaining lease term	9 days
Lease term of lease agreements that have not yet commenced	1 year 3 months 22 days
Maximum
Lessee, Lease, Description [Line Items]
Remaining lease term	11 years 9 months 4 days
Lease term of lease agreements that have not yet commenced	12 years 3 days