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, 2017	Dec. 31, 2016	Dec. 31, 2017	Dec. 31, 2016
Numerator:
Net income	$ 9,527	$ 76,743	$ 95,651	$ 152,849
Denominator:
Basic weighted-average common shares outstanding	142,715	141,310	142,511	141,048
Effect of dilutive securities:
Stock options and restricted stock units	1,140	787	1,246	934
Diluted weighted average shares	143,855	142,097	143,757	141,982
Basic earnings per share	$ 0.07	$ 0.54	$ 0.67	$ 1.08
Diluted earnings per share	$ 0.07	$ 0.54	$ 0.67	$ 1.08