Earnings Per Share (Schedule Of Basic And Diluted Earnings Per Share) (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended				6 Months Ended
	Dec. 31, 2021	Sep. 30, 2021	Dec. 31, 2020	Sep. 30, 2020	Dec. 31, 2021	Dec. 31, 2020
Numerator:
Net income (loss)	$ 201,751	$ 203,613	$ 179,514	$ 178,372	$ 405,364	$ 357,886
Denominator:
Basic weighted-average common shares outstanding	145,990		145,246		145,835	145,053
Effect of dilutive securities:
Stock options and restricted stock units	1,050		1,175		1,209	1,297
Diluted weighted average shares	147,040		146,421		147,044	146,350
Basic earnings (loss) per share	$ 1.38		$ 1.24		$ 2.78	$ 2.47
Diluted earnings (loss) per share	$ 1.37		$ 1.23		$ 2.76	$ 2.45