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Supplemental Balance Sheet Information (Components Of Property, Plant And Equipment) (Details) - USD ($)
$ in Thousands
Dec. 31, 2021
Jun. 30, 2021
Supplemental Balance Sheet Information [Abstract]    
Property, plant and equipment, at cost $ 1,111,406 $ 1,085,629
Accumulated depreciation and amortization (633,628) (622,139)
Property, plant and equipment, net $ 477,778 $ 463,490