Credit Agreements (Details) (USD $)	3 Months Ended					3 Months Ended			1 Months Ended	3 Months Ended
	Sep. 30, 2013	Sep. 30, 2012	Jun. 30, 2013	May 31, 2013	Mar. 22, 2013	Sep. 30, 2013 JP Morgan UK [Member]	Sep. 30, 2013 RBSNederlandNV [Member]	Sep. 30, 2013 Interest Rate Cap [Member]	May 31, 2013 Interest Rate Swap [Member]	Sep. 30, 2013 Interest Rate Swap [Member]	Sep. 30, 2013 Senior Notes due in 2020 [Member]	Mar. 22, 2013 2013 Credit Agreement LIBOR [Member]	Sep. 30, 2013 2013 Credit Agreement [Member]	Mar. 22, 2013 Swingline Loan [Member]	Sep. 30, 2013 Revolving Credit Facility [Member]	Mar. 22, 2013 Revolving Credit Facility [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]	Sep. 30, 2013 Term Loan [Member]	Mar. 22, 2013 Term Loan [Member]	May 31, 2013 Treasury Lock [Member] agreement	May 31, 2013 Treasury Lock [Member] Treasury Lock 1 [Member]	May 31, 2013 Treasury Lock [Member] Treasury Lock 2 [Member]	May 31, 2013 Treasury Lock [Member] Treasury Lock 3 [Member]	Jul. 25, 2013 Senior Notes due in 2020 [Member] Senior Notes [Member]
Line of Credit Facility [Line Items]
Debt Instrument, Interest Rate, Stated Percentage																											3.11%
Derivative, Number of Instruments Held																							3
Derivative, Notional Amount	$ 532,463,000		$ 509,947,000																					$ 25,000,000	$ 25,000,000	$ 25,000,000
Deferred Finance Costs, Noncurrent, Net											400,000		3,300,000
Long-term Debt																						200,000,000
Debt Instrument, Face Amount																200,000,000
Proceeds from Issuance of Long-term Debt		107,500,000
Line of Credit Facility, Current Borrowing Capacity														75,000,000		300,000,000
Letters of Credit Outstanding, Amount	9,800,000															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%
Credit agreement maximum borrowing capacity						4,500,000	5,000,000
Debt Instrument, Interest Rate, Stated Percentage Rate Range, Minimum						2.00%	2.00%
Debt Instrument, Interest Rate, Stated Percentage Rate Range, Maximum						4.00%	4.00%
Line of credit facility amount outstanding															210,000,000
Long-term Debt, Gross	505,003,000																				195,000,000						100,000,000
Max commitment fee on revolving loan unused amount, percentage	0.35%
Remaining borrowing available under revolving credit facility						4,500,000	5,000,000								90,000,000
Interest rate swap, fixed interest rate	1.30%			0.73%
Notional Amount of Interest Rate Derivatives	200,000,000
Derivative interest rate cap arrangement	2.00%
Principal amount of debt hedged with an interest rate swap agreement								25,000,000	100,000,000	100,000,000
Debt, Weighted Average Interest Rate													0.00%
Bank Overdrafts	$ 36,700,000		$ 40,800,000