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Unaudited Condensed Consolidated Statements of Comprehensive Income - USD ($)
$ in Thousands
 3 Months Ended 9 Months Ended
Sep. 30, 2022
Sep. 30, 2021
Sep. 30, 2022
Sep. 30, 2021
Statement of Comprehensive Income [Abstract]        
Net income $ 10,614 $ 24,837 $ 60,376 $ 40,303
Reclassification of pension and postretirement adjustments into earnings, net of $38 and $105 tax benefit in the three and nine months ended September 30, 2022, respectively, and net of $42 and $127 tax benefit in the three and nine months ended September 30, 2021, respectively. 118 143 354 429
Total other comprehensive income 118 143 354 429
Comprehensive income $ 10,732 $ 24,980 $ 60,730 $ 40,732