Retirement Benefits (Components Of Net Periodic Benefit Costs) (Detail) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Sep. 30, 2012	Sep. 30, 2011
Employee Benefit Plans [Line Items]
Service cost	$ 530	$ 415
Interest cost	1,749	2,025
Expected return on plan assets	(72)	(61)
Amortization of prior service cost	293	352
Amortization of net loss	967	448
Net periodic benefit cost	$ 3,467	$ 3,179