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Valuation and Qualifying Accounts (Details) (USD $)
In Thousands, unless otherwise specified
 12 Months Ended
Jun. 30, 2012
Jun. 30, 2011
Jun. 30, 2010
Jun. 30, 2012
Allowance for Doubtful Accounts [Member]
Jun. 30, 2011
Allowance for Doubtful Accounts [Member]
Jun. 30, 2010
Allowance for Doubtful Accounts [Member]
Jun. 30, 2012
Valuation Allowance of Deferred Tax Assets [Member]
Jun. 30, 2010
Valuation Allowance of Deferred Tax Assets [Member]
Jun. 30, 2009
Valuation Allowance of Deferred Tax Assets [Member]
Valuation and Qualifying Accounts Disclosure [Line Items]                  
Balance at Beginning of Period $ 2,202 $ 2,178 $ 1,550 $ 1,428 $ 1,404 $ 776 $ 774 $ 774 $ 774
Charged to Costs and Expenses (521) 24 (40) 23 24 (40) (544) [1]    
Charged to Other Accounts - Describe (250)   831 (250) [2]   831 [3]      
Deductions Describe     (163)     (163) [4]      
Balance at End of Period $ 1,431 $ 2,202 $ 2,178 $ 1,201 $ 1,428 $ 1,404 $ 230 $ 774 $ 774
[1] (B)   Release of the valuation allowance on foreign tax credit carryovers which have now been determined to be utilized in the next two fiscal years.
[2] (A)   Collection on reserve recognized as revenue.
[3] (C)   Primarily relates to a reclassification of reserves that were initially recorded in billings on uncompleted contracts in excess of costs and estimated earnings.
[4] (D)   Receivables written off against allowance for doubtful accounts.