Investments (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Mar. 31, 2017	Mar. 31, 2016	Mar. 31, 2017	Mar. 31, 2016
Investments, Debt and Equity Securities [Abstract]
Total gains (losses) recognized from trading securities held for investment	$ 738	$ 2	$ (354)	$ 120
Less: Realized gains (losses) from sales of trading securities held for investment	7	17	5	(10)
Unrealized gains (losses) from trading securities held for investment	$ 731	$ (15)	$ (359)	$ 130