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Fair Value Measurements (Tables)
 12 Months Ended
Jun. 30, 2013
Fair Value Disclosures [Abstract]  
Financial assets and liabilities measured at fair value
The following table summarizes our financial assets and liabilities, which are measured at fair value on a recurring basis (in thousands), as of June 30:
 
Total
Measured
at Fair
Value
 
Quoted Prices
in Active
Markets for
Identical
Assets
(Level 1)
 
Significant
Other
Observable
Inputs
(Level 2)
 
Significant
Unobservable
Inputs
(Level 3)
 
2013
 
2012
 
2013
 
2012
 
2013
 
2012
 
2013
 
2012
Available-for-sale and trading securities
$
20,772

 
$
29,651

 
$
20,772

 
$
29,651

 
$
—

 
$
—

 
$
—

 
$
—

Derivative financial instruments, net
2,081

 
7,029

 
—

 
—

 
2,081

 
7,029

 
—

 
—