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LEASES - Narrative (Details)
$ in Millions
3 Months Ended
Mar. 31, 2019
USD ($)
Lessee, Lease, Description [Line Items]  
Aggregate rent obligation of leases not yet commenced $ 1.1
Minimum  
Lessee, Lease, Description [Line Items]  
Remaining lease term 1 month
Lease extension period, up to 3 years
Lease terms of leases not yet commenced 3 years
Maximum  
Lessee, Lease, Description [Line Items]  
Remaining lease term 20 years
Lease extension period, up to 5 years
Lease terms of leases not yet commenced 5 years