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LEASES - Schedule of Lease Costs and Other Lease Information (Details)
$ in Thousands
 3 Months Ended 6 Months Ended
Jun. 30, 2019
USD ($)
Jun. 30, 2019
USD ($)
Lease cost:    
Amortization of right-of-use assets $ 503 $ 912
Interest expense 186 342
Fixed lease cost 4,317 8,544
Short-term lease cost 1,092 1,750
Variable lease cost 35 42
Total lease cost 6,133 11,590
Cash paid for amounts included in the measurement of lease liabilities:    
Financing cash flows for finance leases 733 1,204
Operating cash flows for operating leases 4,831 6,874
Right-of-use assets obtained in exchange for new finance lease liabilities 4,384 6,857
Right-of-use assets obtained in exchange for new operating lease liabilities $ 173 $ 588
Weighted-average remaining lease term - finance leases (years) 6 years 9 months 18 days 6 years 9 months 18 days
Weighted-average remaining lease term - operating leases (years) 11 years 3 months 18 days 11 years 3 months 18 days
Weighted-average discount rate - finance leases 5.20% 5.20%
Weighted-average discount rate - operating leases 6.50% 6.50%