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Retirement Benefits (Amount Amortized From AOCI Into Net Periodic Benefit Cost) (Detail) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Jun. 30, 2012	Jun. 30, 2011	Jun. 30, 2010
Defined Benefit Plan Disclosure [Line Items]
Recognized net actuarial loss	$ 3,872
Amortization of prior service cost	1,169	1,502	1,407
Total	$ 5,041

The aggregate amount in accumulated other comprehensive income expected to be recognized as a component of net periodic benefit cost over the fiscal year that follows the most recent annual statement of financial position presented, including the net gain (loss), net prior service cost or credit, and net transition asset or obligation.

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