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Long-Term Debt Long Term Debt (Term Loan B) (Details) (USD $)
0 Months Ended 3 Months Ended 9 Months Ended 2 Months Ended 3 Months Ended 9 Months Ended 0 Months Ended 3 Months Ended 9 Months Ended
Jan. 16, 2014
Term Loan B [Member]
Mar. 31, 2014
Term Loan B [Member]
Mar. 31, 2014
Term Loan B [Member]
Dec. 31, 2011
Term Loan A [Member]
Mar. 31, 2014
Term Loan A [Member]
Mar. 31, 2013
Term Loan A [Member]
Mar. 31, 2014
Term Loan A [Member]
Mar. 31, 2013
Term Loan A [Member]
Nov. 09, 2011
Term Loan A [Member]
Jan. 16, 2014
LIBOR [Member]
Term Loan B [Member]
Mar. 31, 2014
LIBOR [Member]
Term Loan A [Member]
Mar. 31, 2013
LIBOR [Member]
Term Loan A [Member]
Mar. 31, 2014
LIBOR [Member]
Term Loan A [Member]
Mar. 31, 2013
LIBOR [Member]
Term Loan A [Member]
Debt Instrument [Line Items]                            
Credit agreement, maximum capacity $ 800,000,000               $ 600,000,000          
Term loan period, years 7 years     5 years                    
Term loan repayment as percentage of principal in year 1 0.25%     1.25%                    
Interest addition to floating rate 0.75%                 2.50% 2.25% 2.50% 2.25% 2.50%
Interest expense   $ 5,300,000 $ 5,300,000   $ 3,200,000 $ 3,700,000 $ 10,100,000 $ 11,900,000