Earnings Per Share - Additional Information (Detail) (USD $)	12 Months Ended
	Jun. 30, 2013	Jun. 30, 2012	Jun. 30, 2011	Jun. 30, 2013 Restricted Shares and Restricted Stock Units [Member]	Jun. 30, 2012 Restricted Shares and Restricted Stock Units [Member]	Jun. 30, 2011 Restricted Shares and Restricted Stock Units [Member]	Jun. 30, 2013 Convertible Senior Notes [Member]	Oct. 31, 2012 Convertible Senior Notes [Member]
Schedule Of Earnings Per Share Basic And Diluted [Line Items]
Common stock outstanding and not included in the computation of diluted earnings per share	1,258,680	1,685,144	1,661,273	0	3,000	712
Convertible Senior Notes, outstanding								$ 400,000,000
Convertible Senior Notes, interest rate								1.25%
Initial conversion price of the Convertible Senior Notes	$ 104
Amount of Convertible Senior Notes	$ 1,000						$ 1,000