Annual report pursuant to Section 13 and 15(d)

Supplemental Disclosures of Cash Flow Information and Noncash Investing and Financing Activities - Additional Information (Detail)

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Supplemental Disclosures of Cash Flow Information and Noncash Investing and Financing Activities - Additional Information (Detail) (USD $)
12 Months Ended
Jun. 30, 2013
Jun. 30, 2012
Jun. 30, 2011
Other Significant Noncash Transactions [Line Items]      
Cash paid for income taxes $ 51,600,000 $ 58,700,000 $ 46,200,000
Stock options shares of common stock exercised     14,834
Shares of common stock surrender as a result of option exercise     9,096
Fair market value of common stock surrender as a result of option exercise     $ 561,000