Credit Arrangements - 2013 Credit Agreement (Details) (USD $)	3 Months Ended	12 Months Ended					12 Months Ended							12 Months Ended					1 Months Ended
	Mar. 31, 2011	Jun. 30, 2014	Jun. 30, 2013	May 31, 2013	Mar. 22, 2013	Sep. 30, 2011	Jun. 30, 2014 Term Loan [Member]	Mar. 22, 2013 Term Loan [Member]	Jun. 30, 2011 Term Loan [Member]	Jun. 30, 2014 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, 2014 2013 Credit Agreement LIBOR [Member]	Jun. 30, 2014 2013 Credit Agreement Federal Funds Rate [Member]	Jun. 30, 2014 2013 Credit Agreement One Month LIBOR [Member]	Jun. 30, 2014 2013 Credit Agreement One Month LIBOR Margin [Member]	Jun. 30, 2014 2013 Credit Agreement Swingline [Member]	May 31, 2013 Interest Rate Swap [Member]	Sep. 30, 2011 Interest Rate Swap [Member]	Sep. 30, 2011 Interest Rate Cap [Member]	Jun. 30, 2014 Credit Facility [Domain]	Jun. 30, 2014 Derivatives Designated As Hedging Instruments [Member]	Jun. 30, 2013 Derivatives Designated As Hedging Instruments [Member]	Jun. 30, 2014 Derivatives Designated As Hedging Instruments [Member] Interest Rate Contract [Member]
Debt Instrument [Line Items]
Long-term Debt		$ 350,001,000						$ 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		187,500,000			62,500,000
Debt Instrument, Periodic Payment, Principal							10,000,000
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%
Deferred Finance Costs, Net																						2,700,000
Remaining borrowing capacity available										237,500,000
Principal amount of debt hedged with an interest rate swap agreement																			100,000,000	100,000,000	25,000,000
Derivative Interest Rate Cap Arrangement						2.00%
Derivative, Fixed Interest Rate				0.73%																1.30%
Notional Amount of Interest Rate Derivatives		$ 568,853,000	$ 509,947,000																				$ 418,141,000	$ 401,811,000	$ 200,000,000
Debt, Weighted Average Interest Rate		1.60%								3.05%