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Supplemental Financial Information (Other Operating (Income) Expense, Net) (Details) - USD ($)
$ in Thousands
3 Months Ended 6 Months Ended
Jun. 30, 2021
Jun. 30, 2020
Jun. 30, 2021
Jun. 30, 2020
UTIS fire        
Fixed assets write-offs $ 0 $ 0 $ 891 $ 0
Inventory charges 40 0 320 0
Professional services 1,072 0 1,594 0
Lease obligations 54 0 540 0
Compensation & benefits 600 0 844 0
Other 76 0 76 0
Insurance recoveries (359) 0 (1,478) 0
Total UTIS fire 1,483 0 2,787 0
(Gain) loss on sale or disposal of property, plant and equipment (593) 33 (682) 53
Economic incentive grants 0 (145) 0 (145)
Total other operating (income) expense, net $ 890 $ (112) $ 2,105 $ (92)