Annual report pursuant to Section 13 and 15(d)

Contractual Maturities of Available-For-Sale Investments (Detail)

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Contractual Maturities of Available-For-Sale Investments (Detail) (USD $)
In Thousands
Jun. 30, 2011
Jun. 30, 2010
Schedule of Available-for-sale Securities [Line Items]    
Due within one year $ 63,200  
Due one to five years 131,988  
Available-for-sale Securities, Fair Value Disclosure $ 195,188 $ 215,843