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Leases - Supplemental Balance Sheet Information (Details) - USD ($)
$ in Thousands
Mar. 31, 2019
Jan. 01, 2019
Dec. 31, 2018
Leases [Abstract]      
Other assets (net of lease impairment of $1,325) $ 16,277 $ 17,900  
Operating Lease, Right-Of-Use Asset, Impairment 1,325    
Other current liabilities 6,810    
Other long-term liabilities 11,133    
Total operating lease liabilities 17,943 $ 17,900  
Property, plant and equipment, gross 1,131    
Accumulated depreciation (302)    
Property, plant and equipment, net 829    
Current portion of long-term debt 299    
Long-term debt 244    
Total finance lease liabilities $ 543   $ 0
Weighted average remaining lease term (in years)      
Operating leases 3 years 9 months 18 days    
Finance leases 3 years 9 months 29 days    
Weighted average discount rate      
Operating leases 4.41%    
Finance leases 4.90%