Credit Arrangements - 2013 Credit Agreement (Details) (USD $)	3 Months Ended	12 Months Ended																1 Months Ended		12 Months Ended
	Mar. 31, 2012	Jun. 30, 2013	May 31, 2013	Mar. 22, 2013	Jun. 30, 2013 Term Loan [Member]	Mar. 22, 2013 Term Loan [Member]	Jun. 30, 2011 Term Loan [Member]	Jun. 30, 2013 Revolving Credit Facility [Member]	Mar. 22, 2013 Revolving Credit Facility [Member]	Jun. 30, 2011 Revolving Credit Facility [Member]	Mar. 22, 2013 Swingline Loan [Member]	Jun. 30, 2013 2013 Credit Agreement [Member]	Mar. 22, 2013 2013 Credit Agreement LIBOR [Member]	Mar. 22, 2013 2013 Credit Agreement Federal Funds Rate [Member]	Mar. 22, 2013 2013 Credit Agreement One Month LIBOR [Member]	Mar. 22, 2013 2013 Credit Agreement One Month LIBOR Margin [Member]	Mar. 22, 2013 2013 Credit Agreement Swingline [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
Line of Credit Facility, Current Borrowing Capacity									300,000,000	300,000,000	75,000,000
Line of Credit Facility, Additional Borrowing Capacity									200,000,000
Letters of Credit Outstanding, Amount									10,000,000
Proceeds from Issuance of Long-term Debt	107,500,000
Long-term Debt, Gross				400,000,000	197,500,000
Debt Instrument, Basis Spread on Variable Rate													1.75%	0.50%	1.00%	0.75%	0.75%
Term Loan, Quarterly Principal Payment Percentage,year one and two				1.25%
Term Loan, Quarterly Principal Payment Percentage,year three				2.50%
Term Loan, Quarterly Principal Payment Percentage,year four				5.00%
Term Loan, Quarterly Principal Payment Percentage,year five				7.50%
Term Loan, Quarterly Principal Payment Percentage,maturity date				37.50%
Commitment fee on revolving loan unused amount, percentage		0.35%
Line of credit facility amount outstanding								240,000,000
Deferred Finance Costs, Net		3,400,000
Remaining borrowing capacity available								60,000,000
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%
Notional Amount of Interest Rate Derivatives		$ 200,000,000
Debt, Weighted Average Interest Rate												1.87%