Earnings Per Share (Schedule Of Basic And Diluted Earnings Per Share) (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended						9 Months Ended
	Mar. 31, 2019	Dec. 31, 2018	Sep. 30, 2018	Mar. 31, 2018	Dec. 31, 2017	Sep. 30, 2017	Mar. 31, 2019	Mar. 31, 2018
Numerator:
Net income	$ 105,416	$ 124,639	$ 105,737	$ 110,125	$ 9,527	$ 86,125	$ 335,791	$ 205,777
Denominator:
Basic weighted-average common shares outstanding	143,316,000			142,898,000			142,907,000	142,688,000
Effect of dilutive securities:
Stock options and restricted stock units	1,017,000			1,087,000			1,437,000	1,207,000
Diluted weighted average shares	144,333,000.00			143,985,000.00			144,344,000.00	143,895,000.00
Basic earnings per share	$ 0.74			$ 0.77			$ 2.35	$ 1.44
Diluted earnings per share	$ 0.73			$ 0.76			$ 2.33	$ 1.43