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Short-Term and Long-Term Obligations - Short-term Obligations (Details) (USD $)
In Thousands, unless otherwise specified
 12 Months Ended
Jun. 30, 2014
Jun. 30, 2013
Jun. 30, 2014
Bank of America [Member]
Revolving Credit Facility [Member]
Line of Credit [Member]
Jun. 30, 2013
Bank of America [Member]
Revolving Credit Facility [Member]
Line of Credit [Member]
Jun. 30, 2014
London Interbank Offered Rate (LIBOR) [Member]
Bank of America [Member]
Revolving Credit Facility [Member]
Line of Credit [Member]
Jun. 30, 2014
Line of Credit [Member]
Bank of America [Member]
Revolving Credit Facility [Member]
Jun. 30, 2013
Line of Credit [Member]
Bank of America [Member]
Revolving Credit Facility [Member]
Short-term Debt [Line Items]              
Credit facility, remaining borrowing capacity     $ 22,301        
Line of credit, total outstanding balance 17,699 10,899 17,699 10,899      
Credit facility, basis spread on variable rate         1.25%    
LIBOR rate         0.15%    
Amount of assets as collateral for credit facility           $ 751,396 $ 586,742