Comprehensive Income (Loss) (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021
Other Comprehensive Income (Loss), before Tax [Abstract]
Foreign currency translation adjustment	$ (2)	$ (76)
Derivative Instruments, Gain (Loss) Reclassified from Accumulated OCI into Income, Effective Portion, Net	(153)	(153)
Postretirement medical liability adjustment	(212)	(212)
Other Comprehensive Income (Loss), before Tax	(61)	(135)
Other Comprehensive Income (Loss), Tax [Abstract]
Foreign currency translation adjustment	0	0
Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), Reclassification, Tax	(40)	(40)
Postretirement medical liability adjustment	54	54
Other Comprehensive Income (Loss), Tax	14	14
Other comprehensive income (loss), net of tax:
Foreign currency translation adjustment	(2)	(76)
Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), Reclassification, after Tax	(113)	(113)
Postretirement medical liability adjustment	(158)	(158)
Total Other Comprehensive (Loss) Income	(47)	(121)
Reclassification from Accumulated Other Comprehensive Income, Current Period, Net of Tax	$ (158)	$ (158)