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Condensed Consolidated Statements of Comprehensive Income (Loss) (Unaudited) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021
Statement of Comprehensive Income [Abstract]
Net loss	$ 14,539	$ (4,211)	$ (11,308)	$ (43,343)
Other comprehensive income net of tax:
Pension and postretirement liability adjustments, net of tax	83	156	167	312
Comprehensive income (loss)	$ 14,622	$ (4,055)	$ (11,141)	$ (43,031)

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Pension And Postretirement Liability Activity

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Amount after tax of increase (decrease) in equity from transactions and other events and circumstances from net income and other comprehensive income, attributable to parent entity. Excludes changes in equity resulting from investments by owners and distributions to owners.

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