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Long-Term Debt (Term Loan And Revolver) (Narrative) (Details) (USD $)
In Millions, unless otherwise specified
 12 Months Ended 2 Months Ended 12 Months Ended 2 Months Ended
Jun. 30, 2012
Old Term Loan [Member]
Jun. 30, 2011
Old Term Loan [Member]
Dec. 31, 2011
Term Loan [Member]
Jun. 30, 2013
Term Loan [Member]
Jun. 30, 2012
Term Loan [Member]
Nov. 09, 2011
Term Loan [Member]
Dec. 31, 2011
Revolving Credit Facility [Member]
Nov. 09, 2011
Revolving Credit Facility [Member]
Nov. 09, 2011
LIBOR [Member]
Term Loan [Member]
Debt Instrument [Line Items]                  
Credit agreement, maximum capacity           $ 600   $ 100  
Term loan period, years     5 years            
Term loan repayment as percentage of principal in year 1     1.25%            
Term loan repayment as percentage of principal in year 2     1.25%            
Term loan repayment as percentage of principal in year 3     1.88%            
Term loan repayment as percentage of principal in year 4     1.88%            
Term loan repayment as percentage of principal in year 5     2.50%            
Interest addition to floating rate                 2.25%
Interest expense $ 2.7 $ 7.3   $ 15.5 $ 10.9        
Revolver credit agreement term, years             5 years