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LEASES - Supplemental cash flow information (Details)
$ in Thousands
6 Months Ended
Jun. 30, 2019
USD ($)
Cash paid for amounts included in the measurement of lease liabilities:  
Operating cash flows from operating leases $ 2,032
Operating cash flows from finance leases 30
Financing cash flows from finance leases 932
ROU assets obtained in exchange for lease obligations:  
Finance leases 1,252
Operating leases $ 27,224