Earnings Per Share (Schedule Of Basic And Diluted Earnings Per Share) (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	12 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2019
Numerator:
Net income (loss)	$ 474,505	$ 621,674	$ 404,592
Denominator:
Basic weighted-average common shares outstanding	145,313	144,338	143,111
Effect of dilutive securities:
Stock options and restricted stock units	1,138	1,314	1,373
Diluted weighted average shares	146,451	145,652	144,484
Basic earnings (loss) per share	$ 3.27	$ 4.31	$ 2.83
Diluted earnings (loss) per share	$ 3.24	$ 4.27	$ 2.80