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Leases (Details) - USD ($)
$ in Thousands
Jun. 30, 2020
Dec. 31, 2019
Leases [Abstract]    
Operating right-of-use assets $ 24,892 $ 28,178
Property, plant and equipment, net 440 505
Total right-of use assets 25,332 28,683
Operating lease liabilities, current and long-term portions 25,450 28,577
Long-term debt, current and long-term portions 531 590
Total lease liabilities $ 25,981 $ 29,167