Share-Based Compensation Expense by Award Type (Detail) - USD ($) $ in Thousands	12 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2013
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Share based compensation expense	$ 12,989	$ 12,997	$ 12,657
Stock Options and Cash-Based Stock Appreciation Rights
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Share based compensation expense	5,158	5,818	5,046
Restricted Share Awards and Cash-Based Restricted Share Unit Awards
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Share based compensation expense	5,182	4,868	4,411
Performance Share Awards and Cash-Based Performance Share Unit Awards
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Share based compensation expense	$ 2,649	$ 2,311	$ 3,200