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Condensed Consolidated Statements of Comprehensive (Loss) Income (Unaudited) (Parenthetical) - USD ($)
$ in Thousands
3 Months Ended 6 Months Ended
Sep. 30, 2021
Sep. 30, 2020
Sep. 30, 2021
Sep. 30, 2020
Statement Of Income And Comprehensive Income [Abstract]        
Defined benefit pension and other postretirement plans, tax expense $ 72 $ 63 $ 121 $ 124