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Commitments and Contingencies Lease Liability Cash Activity (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2020
Dec. 31, 2019
Financing Lease Liability Activity [Abstract]    
Finance Lease, Principal Payments $ 631 $ 1,081
Right-of-Use Asset Obtained in Exchange for Operating Lease Liability 2,471 7
Right-of-Use Asset Obtained in Exchange for Finance Lease Liability $ 652 $ 1,111