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Leases (Details) - USD ($)
$ in Thousands
Sep. 30, 2019
Dec. 31, 2018
Leases [Abstract]    
Operating right-of-use assets $ 29,702 $ 0
Property, plant and equipment, net 650  
Total right-of use assets 30,352  
Operating lease liabilities, current and long-term portions 29,196  
Long-term debt, current and long-term portions 598  
Total lease liabilities $ 29,794