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Note 10 - Income Taxes (Details) - Deferred Income Taxes (USD $)
In Thousands, unless otherwise specified
Jun. 30, 2014
Jun. 30, 2013
Deferred tax liabilities:    
Depreciation and amortization $ (20,934) $ (18,778)
Total deferred tax liability (20,934) (18,778)
Deferred tax assets:    
Accrued compensation 4,463 3,464
Accrued expenses and reserves 3,040 2,429
Pension 10,975 12,246
Inventory 1,549 1,588
Other 758 806
Net operating loss and credit carry forwards 3,685 3,164
Total deferred tax asset 24,470 23,697
Less: Valuation allowance (530) (520)
Net deferred tax asset (liability) $ 3,006 $ 4,399