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Supplemental Balance Sheet Information (Components Of Property, Plant And Equipment) (Details) - USD ($)
$ in Thousands
Mar. 31, 2021
Jun. 30, 2020
Supplemental Balance Sheet Information [Abstract]    
Property, plant and equipment, at cost $ 1,056,004 $ 969,166
Accumulated depreciation and amortization (600,898) (551,831)
Property, plant and equipment, net $ 455,106 $ 417,335