CONSOLIDATED STATEMENTS OF SHAREHOLDERS' EQUITY (Parenthetical) - shares	12 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2012
Class A common stock purchased (shares)	95,251	93,351	55,052
Purchases of stock under ESPP, shares	37,383	52,191	48,679
Common Class A [Member]
Common stock outstanding, Shares	13,866,421	13,866,361	13,865,021	13,862,505
Class A common stock purchased (shares)	95,251	93,351	55,052
Number of shares issued as result of stock conversion	60	1,340	2,516
Common Class C [Member]
Common stock outstanding, Shares	2,069,127	2,069,187	2,070,527	2,073,043
Number of shares converted	60	1,340	2,516