| 
         所以金融衍生工具和对冲活动mulated Other Comprehensive Income (Details) (USD $) In Thousands, unless otherwise specified | 12 Months Ended | |
|---|---|---|
| 
         Jun. 30, 2014 | 
         Jun. 30, 2013 | |
| Accumulated Other Comprehensive Income | ||
| Beginning balance | $ 2,484 | $ (962) | 
| Amount reclassified to income | (4,145) | (1,483) | 
| Net change | 1,641 | 4,929 | 
| Ending balance | (20) | 2,484 | 
| 
         Designated as Hedging Instrument | ||
| Accumulated Other Comprehensive Income | ||
| Amount reclassified to income | $ 4,145 | $ 1,483 | 
| X | ||||||||||
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          - Details
           
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| X | ||||||||||
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          - Definition
           Amount before tax of increase (decrease) in accumulated in equity from transactions and other events and circumstances from non-owner sources. Excludes net income (loss), and accumulated changes in equity from transactions resulting from investments by owners (distributions to owners). No definition available. 
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| X | ||||||||||
| 
          - Definition
           The effective portion of net gain (loss) reclassified from accumulated other comprehensive income into income on derivative instruments designated and qualifying as hedging instruments. Reference 1: http://www.xbrl.org/2003/role/presentationRef 
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| X | ||||||||||
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          - Definition
           The effective portion of gains and losses (net) on derivative instruments designated and qualifying as hedging instruments that was recognized in other comprehensive income during the current period. Reference 1: http://www.xbrl.org/2003/role/presentationRef 
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