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Investments (Tables)
 6 Months Ended
Dec. 31, 2017
Investments, Debt and Equity Securities [Abstract]  
Schedule of Investments
The following table shows gains and losses on trading securities: 
 
 
Three Months Ended December 31,
 
Six Months Ended December 31,
(In thousands)
 
2017
 
2016
 
2017
 
2016
Total gains (losses) recognized from trading securities
 
$
16

 
$
(1,350
)
 
$
7

 
$
(1,091
)
Less: Realized (losses) gains from sales of trading securities
 
—

 
(2
)
 
7

 
(2
)
Unrealized gains (losses) from trading securities
 
$
16

 
$
(1,348
)
 
$
—

 
$
(1,089
)