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Intangible Assets - Company's amortizable intangible assets (Details) - USD ($)
$ in Thousands
6 Months Ended
Jun. 30, 2021
Dec. 31, 2020
Amortizable intangible assets:    
Gross Carrying Amount $ 3,500 $ 3,500
Accumulated Amortization (2,411) (2,294)
Net $ 1,089 1,206
Customer relationships    
Amortizable intangible assets:    
Weighted Average Life (Years) 15 years  
Gross Carrying Amount $ 3,500 3,500
Accumulated Amortization (2,411) (2,294)
Net $ 1,089 $ 1,206