Quarterly report pursuant to Section 13 or 15(d)

Comprehensive Income (Detail)

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Comprehensive Income (Detail) (USD $)
In Thousands, unless otherwise specified
3 Months Ended 9 Months Ended
Mar. 31, 2012
Mar. 31, 2011
Mar. 31, 2012
Mar. 31, 2011
Comprehensive Income (Loss) [Line Items]        
Net earnings $ 31,756 $ 31,064 $ 85,090 $ 83,971
Foreign currency translation adjustments 3,895 3,271 (711) 5,792
Unrealized gain (loss) on available-for-sale investments, net of tax 23,886 (64) 23,879 (401)
Comprehensive Income (Loss), Net of Tax, Attributable to Parent, Total $ 59,537 $ 34,271 $ 108,258 $ 89,362