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Intangible Assets (Details) - USD ($)
$ in Thousands
3 Months Ended
Mar. 31, 2019
Dec. 31, 2018
Amortizable intangible assets:    
Gross Carrying Amount $ 3,500 $ 3,500
Accumulated Amortization (1,886) (1,828)
Net $ 1,614 1,672
Customer Relationships [Member]    
Amortizable intangible assets:    
Weighted Average Life (Years) 15 years  
Gross Carrying Amount $ 3,500 3,500
Accumulated Amortization (1,886) (1,828)
Net $ 1,614 $ 1,672