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Marketable Securities
 3 Months Ended
Sep. 30, 2016
Marketable Securities [Abstract]  
Marketable Securities
Marketable Securities
 
The following table summarizes the fair value, the amortized cost and unrealized holding gains (losses) on our marketable securities as of September 30, 2016 and June 30, 2016:
 
 
Fair Value
 
Cost
 
Unrealized
Gains
 
Unrealized
Losses
 
(Dollars in Thousands)
September 30, 2016:
 

 
 

 
 

 
 

U.S. corporate bonds
$
143,174

 
$
143,215

 
$
—

 
$
(41
)
Total short-term marketable securities
$
143,174

 
$
143,215

 
$
—

 
$
(41
)
 
 
 
 
 
 
 
 
June 30, 2016:
 

 
 

 
 

 
 

U.S. corporate bonds
$
3,006

 
$
3,006

 
$
—

 
$
—

Total short-term marketable securities
$
3,006

 
$
3,006

 
$
—

 
$
—


Our marketable securities were classified as available-for-sale and reported at fair value on the unaudited consolidated balance sheets. Net unrealized gains (losses) were reported as a separate component of accumulated other comprehensive income, net of tax. Realized gains (losses) on investments were recognized in earnings as incurred. Our investments consisted primarily of investment grade fixed income corporate debt securities with maturity dates ranging from October 2016 through May 2017 as of September 30, 2016 and August 2016 as of June 30, 2016.