Investments - Investment Income (Loss) Reflected in Earnings (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2012
Marketable Securities, Gain (Loss) [Abstract]
Realized losses on sales of trading securities	$ (163)	$ (245)	$ (2)
Realized gains on sales of available-for-sale securities	1,044	266	179
Unrealized gains (losses) on trading securities	450	45	(485)
Realized gain on Galileo acquisition	290	0	0
Realized foreign currency gains (losses)	1	1	(2)
Other-than-temporary declines in available-for-sale securities	(3)	(47)	(19)
Dividend and interest income	526	188	152
Total Investment Income (Loss)	$ 2,145	$ 208	$ (177)