Share-Based Compensation - Summary of Stock Option Activity (Detail) (USD $) In Thousands, except Share data, unless otherwise specified	9 Months Ended
	Mar. 31, 2013
Disclosure Of Compensation Related Costs Sharebased Payments [Abstract]
Outstanding at June 30, 2012, Shares	2,410,718
Granted, Shares	522,775
Exercised, Shares	(511,572)
Forfeited or expired, Shares	(168,102)
Outstanding at March 31, 2013, Shares	2,253,819
Exercisable at March 31, 2013, Shares	1,287,425
Outstanding at June 30, 2012, Weighted Average Exercise Price Per Share	$ 54.71
Granted, Weighted Average Exercise Price Per Share	$ 47.20
Exercised, Weighted Average Exercise Price Per Share	$ 32.90
Forfeited or expired, Weighted Average Exercise Price Per Share	$ 69.73
Outstanding at March 31, 2013, Weighted Average Exercise Price Per Share	$ 56.80
Exercisable at March 31, 2013, Weighted Average Exercise Price Per Share	$ 68.11
Outstanding at June 30, 2012, Weighted Average Remaining Contractual Term (Years)	6 years 5 months 1 day
Outstanding at March 31, 2013, Weighted Average Remaining Contractual Term (Years)	6 years 6 months 11 days
Exercisable at March 31, 2013, Weighted Average Remaining Contractual Term (Years)	4 years 9 months 22 days
Outstanding at June 30, 2012, Average Intrinsic Value	$ 9,359
Outstanding at March 31, 2013, Average Intrinsic Value	9,301
Exercisable at March 31, 2013, Average Intrinsic Value	$ 5,091