Share-Based Compensation Expense by Award Type (Detail) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Sep. 30, 2013	Sep. 30, 2012
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share based compensation expense	$ 4,436	$ 3,626
Stock Options and Cash-Based Stock Appreciation Rights
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share based compensation expense	1,960	1,589
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	1,514	1,061
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	$ 962	$ 976