| Estimated Future Amortization Expense for Intangible Assets (Detail) (USD $) In Thousands | 12 Months Ended | 
|---|---|
| Jun. 30, 2011 | |
| Expected Amortization Expense [Line Items] | |
| 2012 | $ 5,135 | 
| 2013 | 5,135 | 
| 2014 | 4,454 | 
| 2015 | 4,453 | 
| 2016 | 4,434 | 
| Thereafter | 28,671 | 
| Finite-Lived Intangible Assets, Future Amortization Expense, Total | $ 52,282 | 
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- Definition Expected Amortization Expense [Line Items] 
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- Definition The aggregate estimated amortization expense for succeeding fiscal years for intangible assets subject to amortization. Reference 1: http://www.xbrl.org/2003/role/presentationRef 
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- Definition The amount of amortization expense expected to be recognized for the remainder of the finite-lived intangible asset useful life after the fifth succeeding fiscal year. 
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- Definition The amount of amortization expense expected to be recognized during year five of the five succeeding fiscal years. Reference 1: http://www.xbrl.org/2003/role/presentationRef 
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- Definition The amount of amortization expense expected to be recognized during year four of the five succeeding fiscal years. Reference 1: http://www.xbrl.org/2003/role/presentationRef 
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- Definition The amount of amortization expense expected to be recognized during year one of the five succeeding fiscal years. Reference 1: http://www.xbrl.org/2003/role/presentationRef 
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- Definition The amount of amortization expense expected to be recognized during year three of the five succeeding fiscal years. Reference 1: http://www.xbrl.org/2003/role/presentationRef 
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- Definition The amount of amortization expense expected to be recognized during year two of the five succeeding fiscal years. Reference 1: http://www.xbrl.org/2003/role/presentationRef 
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