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Lease Obligations (Schedule of Lease Information) (Details) - USD ($)
$ in Thousands
3 Months Ended 6 Months Ended
Jun. 30, 2022
Jun. 30, 2021
Jun. 30, 2022
Jun. 30, 2021
Dec. 31, 2021
Commitments and Contingencies [Abstract]          
Operating lease expense $ 938 $ 932 $ 1,840 $ 1,884  
Variable lease cost-operating leases 257 $ 244 476 $ 490  
Operating lease right-of-use assets 12,194   12,194   $ 12,457
Current liabilities 3,046   3,046   3,296
Operating lease liabilities (noncurrent portion) 10,415   10,415   10,529
Imputed interest (965)   (965)   (1,073)
Total operating lease liabilities $ 12,496   $ 12,496   $ 12,752