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Investments (Tables)
 3 Months Ended
Sep. 30, 2017
Investments, Debt and Equity Securities [Abstract]  
Schedule of Investments
The following table shows gains and losses on trading securities: 
 
 
Three Months Ended September 30,
(In thousands)
 
2017
 
2016
Total (losses) gains recognized from trading securities
 
$
(9
)
 
$
227

Less: Realized losses from sales of trading securities
 
—

 
(2
)
Unrealized (losses) gains from trading securities
 
$
(9
)
 
$
229