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Consolidated Statements of Comprehensive Loss - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Net loss	$ (20,145)	$ (131,891)	$ (307,045)
Other comprehensive income (loss):
Actuarial gain (loss) on defined benefit plans	7,440	22,345	(9,356)
Plan curtailment / amendment credit recognized	0	0	5,510
Reclassified net remeasurement (loss) gains	0	(244)	104
Amortization of prior service credit	(249)	(249)	0
Income taxes on pension	0	0	(926)
Other comprehensive income (loss)	7,191	21,852	(4,668)
Comprehensive loss	$ (12,954)	$ (110,039)	$ (311,713)

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