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Debt Issuance Cost Rollforward (Details) - USD ($)
$ in Thousands
Jun. 30, 2021
Dec. 31, 2020
Jun. 30, 2020
Dec. 31, 2019
Debt Disclosure [Abstract]        
Debt Issuance Costs, Gross $ 0   $ 0  
Accumulated Amortization, Debt Issuance Costs (169)   (169)  
Debt Issuance Costs, Net $ 2,166 $ 2,335 $ 2,503 $ 2,672