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Consolidated Statements of Comprehensive Income (Parenthetical) - USD ($)
$ in Thousands
3 Months Ended 6 Months Ended
Nov. 30, 2021
Nov. 30, 2020
Nov. 30, 2021
Nov. 30, 2020
Statement of Comprehensive Income [Abstract]        
Foreign currency translation adjustments, Tax $ 1,521 $ 81 $ 3,858 $ 2,944
Pension and other postretirement benefit liability adjustments, Tax 1,213 1,722 2,679 2,508
Unrealized gain (loss) on securities and other, Tax 90 240 235 322
Unrealized gain (loss) on derivatives, Tax $ 3,142 $ 119 $ 5,713 $ 5,662