Supplemental Financial Information (Other Operating (Income) Expense, Net) (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021
UTIS fire
Fixed assets write-offs	$ 0	$ 0	$ 0	$ 891
Inventory charges	(1)	40	200	320
Professional services	492	1,072	926	1,594
Lease obligations	46	54	278	540
Compensation & benefits	573	600	1,369	844
Other	2	76	13	76
Insurance recoveries	(2,852)	(359)	(5,042)	(1,478)
Total UTIS fire	(1,740)	1,483	(2,256)	2,787
(Gain) loss on sale or disposal of property, plant and equipment	(3)	(593)	(18)	(682)
Total other operating (income) expense, net	$ (1,743)	$ 890	$ (2,274)	$ 2,105