Credit Arrangements - 2011 Credit Agreement (Details) (USD $)	12 Months Ended							1 Months Ended		12 Months Ended
	Jun. 30, 2013	May 31, 2013	Mar. 22, 2013 Term Loan [Member]	Jun. 30, 2011 Term Loan [Member]	Mar. 22, 2013 Revolving Credit Facility [Member]	Jun. 30, 2011 Revolving Credit Facility [Member]	Jun. 30, 2011 2011 Credit Agreement [Member]	May 31, 2013 Interest Rate Swap [Member]	Sep. 30, 2011 Interest Rate Swap [Member]	Jun. 30, 2013 Interest Rate Swap [Member]	Jun. 30, 2013 Interest Rate Cap [Member]
Debt Instrument [Line Items]
Long-term Debt	$ 447,899,000		$ 200,000,000	$ 100,000,000
Principal amount of debt hedged with an interest rate swap agreement								100,000,000	100,000,000	100,000,000	25,000,000
Derivative Interest Rate Cap Arrangement	2.00%
Derivative, Fixed Interest Rate	1.30%	0.73%
Line of Credit Facility, Current Borrowing Capacity					300,000,000	300,000,000
Debt Instrument, Basis Spread on Variable Rate							1.75%
Debt Instrument, Periodic Payment, Principal	$ 2,500,000