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, 2020	Sep. 30, 2020	Dec. 31, 2019	Sep. 30, 2019	Dec. 31, 2020	Dec. 31, 2019
Numerator:
Net income	$ 179,514	$ 178,372	$ 160,554	$ 120,148	$ 357,886	$ 280,702
Denominator:
Basic weighted-average common shares outstanding	145,246		144,212		145,053	143,966
Effect of dilutive securities:
Stock options and restricted stock units	1,175		1,363		1,297	1,513
Diluted weighted average shares	146,421		145,575		146,350	145,479
Basic earnings per share	$ 1.24		$ 1.11		$ 2.47	$ 1.95
Diluted earnings per share	$ 1.23		$ 1.10		$ 2.45	$ 1.93