Summary Of Significant Accounting Policies (Details) - USD ($) shares in Thousands	12 Months Ended
	Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2015
Summary Of Significant Accounting Policies [Abstract]
Investments	$ 17,958,000
Advertising expenditures	7,300,000	$ 7,500,000	$ 6,900,000
Design, research and development costs	3,700,000	$ 4,200,000	$ 4,100,000
Health care claims threshold for third party insurance	150,000
Workers' compensation threshold for third party insurance	$ 450,000
Potential common shares outstanding	18	50	30
Outstanding options to purchase common stock	86	120	255