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CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME - UNAUDITED (Parenthetical) - USD ($)
$ in Thousands
3 Months Ended 9 Months Ended
Jan. 31, 2022
Jan. 31, 2021
Jan. 31, 2022
Jan. 31, 2021
Other comprehensive (loss) income:        
Unamortized retirement credits (costs), tax (expense) benefit $ (1,328) $ 1,912 $ (2,954) $ 2,621
Unrealized gain on interest rate swaps, tax (expense) $ (678) $ (184) $ (1,453) $ (436)