Stockholders' Equity (Schedule Of Option Activity) (Details) - $ / shares	9 Months Ended	12 Months Ended
	Mar. 31, 2018	Jun. 30, 2017
Stockholders' Equity [Abstract]
Options, Outstanding at beginning of period	1,495,573
Options, Granted	238,815
Options, Exercised	(432,522)
Options, Forfeited
Options, Outstanding at end of period	1,301,866	1,495,573
Options, Exercise price of granted options	$ 84.98
Options exercisable at end of period	787,339
Weighted Average Exercise Price, Outstanding at beginning of period	$ 47.09
Weighted Average Exercise Price, Granted	84.98
Weighted Average Exercise Price, Exercised	34.92
Weighted Average Exercise Price, Forfeited
Weighted Average Exercise Price, Outstanding at end of period	58.09	$ 47.09
Weighted Average Exercise Price, Options exercisable at end of period	$ 49.81
Weighted Average Remaining Contractual Term in Years, Outstanding	4 years 4 months 24 days	3 years 10 months 24 days