Stockholders' Equity (Schedule Of Option Activity) (Details) - $ / shares	3 Months Ended	12 Months Ended
	Sep. 30, 2017	Jun. 30, 2017
Stockholders' Equity [Abstract]
Options, Outstanding at beginning of period	1,495,573
Options, Granted
Options, Exercised	(147,675)
Options, Forfeited
Options, Outstanding at end of period	1,347,898	1,495,573
Options, Exercise price of granted options
Options exercisable at end of period	820,348
Weighted Average Exercise Price, Outstanding at beginning of period	$ 47.09
Weighted Average Exercise Price, Granted
Weighted Average Exercise Price, Exercised	31.70
Weighted Average Exercise Price, Forfeited
Weighted Average Exercise Price, Outstanding at end of period	48.78	$ 47.09
Weighted Average Exercise Price, Options exercisable at end of period	$ 43.05
Weighted Average Remaining Contractual Term in Years, Outstanding	3 years 10 months 24 days	3 years 10 months 24 days