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LEASES - Schedule of Lease Costs and Other Lease Information (Details)
$ in Thousands
 3 Months Ended
Mar. 31, 2019
USD ($)
Finance lease cost:  
Amortization of right-of-use assets $ 409
Interest expense 156
Operating lease cost:  
Fixed lease cost 4,227
Short-term lease cost 658
Variable lease cost 7
Total lease cost 5,457
Cash paid for amounts included in the measurement of lease liabilities:  
Financing cash flows for finance leases 471
Operating cash flows for operating leases 2,043
Right-of-use assets obtained in exchange for new finance lease liabilities 2,473
Right-of-use assets obtained in exchange for new operating lease liabilities $ 415
Weighted-average remaining lease term - finance leases (years) 7 years
Weighted-average remaining lease term - operating leases (years) 11 years 3 months 18 days
Weighted-average discount rate - finance leases 5.30%
Weighted-average discount rate - operating leases 6.50%