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Long-Term Debt (Bank And JV Bank Credit Facility) (Narrative) (Details) (USD $)
 6 Months Ended
Dec. 31, 2011
Oct. 21, 2010
Debt Instrument [Line Items]    
Credit facility, amount outstanding $ 185,000,000  
Unamortized balance included in other assets 5,600,000  
Bank Credit Facility [Member]
    
Debt Instrument [Line Items]    
Credit facility maximum borrowing capacity 300,000,000 750,000,000
Loan maturity date November 18, 2016  
Term loan maximum additional borrowing capacity 300,000,000  
Outstanding borrowings under the Credit Facility, percentage 1.78%  
Debt issuance cost capitalized 7,300,000  
Revolving Facility [Member] | Bank Credit Facility [Member]
    
Debt Instrument [Line Items]    
Credit facility, amount outstanding 185,000,000  
Credit facility maximum borrowing capacity   600,000,000
Previous Credit Facility [Member] | Bank Credit Facility [Member]
    
Debt Instrument [Line Items]    
Credit facility maximum borrowing capacity 200,000,000  
Term Loan [Member]
    
Debt Instrument [Line Items]    
Loan maturity date November 18, 2016  
Term Loan [Member] | Bank Credit Facility [Member]
    
Debt Instrument [Line Items]    
Credit facility maximum borrowing capacity   150,000,000
Term loan period, (in years) 5  
Same-Day Swing Line Loan [Member] | Bank Credit Facility [Member]
    
Debt Instrument [Line Items]    
Credit facility maximum borrowing capacity   50,000,000
Stand-By Letters Of Credit [Member] | Bank Credit Facility [Member]
    
Debt Instrument [Line Items]    
Credit facility maximum borrowing capacity   25,000,000
JV Bank Credit Facility [Member]
    
Debt Instrument [Line Items]    
Credit facility maximum borrowing capacity 1,500,000  
Loan maturity date September 14, 2011  
Term loan period, (in years) 4  
Principal Payment Through September 30, 2015 [Member] | Term Loan [Member] | Bank Credit Facility [Member]
    
Debt Instrument [Line Items]    
Term loan principal payment 1,900,000  
Principal Payment From October 1, 2015 Through September 30, 2016 [Member] | Term Loan [Member] | Bank Credit Facility [Member]
    
Debt Instrument [Line Items]    
Term loan principal payment $ 3,800,000