Weighted-Average Rates Used in Determining Defined Benefit Pension Plan's Net Pension Costs (Detail)	12 Months Ended
	Jun. 30, 2012	Jun. 30, 2011
Defined Benefit Plan Disclosure [Line Items]
Discount rate	5.50%	5.50%
Expected long-term rate of return	7.00%	7.00%
Compensation increase rate