Stockholders' Equity (Schedule Of Option Activity) (Details)	9 Months Ended	12 Months Ended
	Mar. 31, 2019 $ / shares shares	Jun. 30, 2018 $ / shares shares
Stockholders' Equity [Abstract]
Options, Outstanding at beginning of period | shares	1,205,826
Options, Granted | shares	306,842
Options, Exercised | shares	(103,100)
Options, Forfeited | shares	(183)
Options, Outstanding at end of period | shares	1,409,385	1,205,826
Options, Exercise price of granted options	$ 102.12
Options exercisable at end of period | shares	848,075
Weighted Average Exercise Price, Outstanding at beginning of period	$ 60.48
Weighted Average Exercise Price, Granted	102.12
Weighted Average Exercise Price, Exercised	46.41
Weighted Average Exercise Price, Forfeited	52.02
Weighted Average Exercise Price, Outstanding at end of period	70.57	$ 60.48
Weighted Average Exercise Price, Options exercisable at end of period	$ 57.65
Weighted Average Remaining Contractual Term in Years, Outstanding	4 years 4 months 24 days	4 years 4 months 24 days