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Long-Term Debt And Credit Facility (Narrative) (Details) (USD $)
12 Months Ended
Jun. 30, 2011
Jun. 30, 2010
Jun. 30, 2009
Aggregate principal amount of senior notes $ 150,000,000    
Senior notes outstanding 150,000,000 150,000,000  
Senior notes expiration date, in years 10    
Senior notes maturity date May 02, 2016    
Senior notes interest percentage 5.98%    
Revolving credit facility 400,000,000    
Revolving credit facility expiring date July 2015    
Leverage ratio 3.50    
Interest coverage ratio 4.00    
Consolidated leverage ratio 4.0    
Additional borrowing under credit agreement 100,000,000    
Borrowing outstanding under credit agreement 79,000,000 74,900,000  
Interest paid $ 11,004,000 $ 10,216,000 $ 15,048,000
Maximum [Member] | Eurocurrency Rate [Member]
     
Basis spread on variable rate 3.00%    
Eurocurrency Rate [Member] | Minimum [Member]
     
Basis spread on variable rate 1.25%    
Maximum [Member] | Base Rate [Member]
     
Basis spread on variable rate 2.00%    
Base Rate [Member] | Minimum [Member]
     
Basis spread on variable rate 0.25%    
Maximum [Member]
     
Commitment fee 0.45%    
Minimum [Member]
     
Commitment fee 0.25%