Investments (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2016	Dec. 31, 2015
Investments, Debt and Equity Securities [Abstract]
Total (losses) gains recognized from trading securities held for investment	$ (1,350)	$ 265	$ (1,091)	$ 118
Less: Realized losses from sales of trading securities held for investment	(2)	(26)	(2)	(27)
Unrealized (losses) gains from trading securities held for investment	$ (1,348)	$ 291	$ (1,089)	$ 145