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UNAUDITED CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME - USD ($)
$ in Thousands
 3 Months Ended 9 Months Ended
Sep. 30, 2023
Sep. 30, 2022
Sep. 30, 2023
Sep. 30, 2022
Statement of Comprehensive Income [Abstract]        
Net (loss) income $ (3,832) $ 10,614 $ 4,380 $ 60,376
Reclassification of pension and postretirement adjustments into earnings, net of $6 and $18 tax benefit in the three and nine months ended September 30, 2023, respectively, and net of $38 and $105 tax benefit in the three and nine months ended September 30, 2022, respectively. 20 118 59 354
Total other comprehensive income 20 118 59 354
Comprehensive (loss) income $ (3,812) $ 10,732 $ 4,439 $ 60,730