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Retirement Plans (Narrative) (Detail) (USD $)
12 Months Ended
Jun. 30, 2012
Jun. 30, 2011
Jun. 30, 2010
Schedule Of Defined Contribution Plans Disclosures [Line Items]      
Defined contribution plan, employee contribution 15.00%    
Eligible compensation 5.00%    
Company contributed to retirement plans $ 181,000 $ 160,000 $ 153,000