Investments - Narrative (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2012
Schedule of Trading Securities and Other Trading Assets
Total gain recognized on trading securities held for investment	$ 464	$ 230	$ 1,154
Less: Realized gain on sales of trading securities held for investment	116	499	1,475
Unrealized gain (loss) on trading securities held for investment	348	(269)	(321)
Cash Flow Hedging [Member]
Schedule of Trading Securities and Other Trading Assets
Derivative Instruments, Gain (Loss) Recognized in Other Comprehensive Income (Loss), Effective Portion, Net	$ 17,524	$ (7,921)