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Lease Obligations (Schedule of Lease Information) (Details) - USD ($)
$ in Thousands
 3 Months Ended 6 Months Ended
Jun. 30, 2023
Jun. 30, 2022
Jun. 30, 2023
Jun. 30, 2022
Dec. 31, 2022
Commitments and Contingencies [Abstract]          
Operating lease expense $ 896 $ 938 $ 1,832 $ 1,840  
Variable lease expense-operating leases 256 $ 257 524 $ 476  
Operating lease right-of-use assets 13,658   13,658   $ 13,520
Current liabilities 1,631   1,631   3,062
Operating lease liabilities (noncurrent portion) 13,797   13,797   12,218
Imputed interest (1,425)   (1,425)   (1,421)
Total operating lease liabilities $ 14,003   $ 14,003   $ 13,859