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Note 11. Fair Value - Textuals (Details) - USD ($)
$ in Thousands
12 Months Ended
Jun. 30, 2015
Jun. 30, 2014
Jun. 30, 2013
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis      
Fair Value, Transfers Between Levels, Amount $ 0 $ 0  
Fair Value, Purchases and Sales of Level 3 Assets $ 0 $ 0  
FY 2007 Gaylord Restructuring Plan | Held for Sale Facilty and Land Related to the Gaylord, Michigan Exited Operation | Fair Value, Measurements, Nonrecurring      
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis      
Assets, Non-recurring fair value adjustment, impairment loss     $ (188)