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Condensed Consolidated Statements of Comprehensive Loss (Unaudited) - USD ($)
$ in Thousands
3 Months Ended
Mar. 31, 2021
Mar. 31, 2020
Net loss $ (35,527) $ (18,524)
Other comprehensive income:    
Change in pension plan and supplemental pension plan liability, net of tax of $0 and $0, respectively (71) 369
Total comprehensive loss $ (35,598) $ (18,155)