Subsequent Event (Details) $ / shares in Units, $ in Thousands			1 Months Ended	3 Months Ended
		Aug. 04, 2015 $ / shares	Jul. 31, 2015 USD ($) businesses_acquired	Jun. 30, 2015 USD ($) businesses_acquired banks $ / shares	Jun. 30, 2014 USD ($) $ / shares	Jul. 24, 2015 USD ($) banks
Subsequent Event [Line Items]
Dividends Declared per Common Share | $ / shares				$ 0.60	$ 0.55
Net cash paid for acquisitions				$ 26,182	$ 23,463
Subsequent Event [Member]
Subsequent Event [Line Items]
Dividends Declared per Common Share | $ / shares		$ 0.60
Money market loans [Member] | Agreement expiring in July 2016 [Member] | Subsequent Event [Member]
Subsequent Event [Line Items]
Short-term debt, maximum borrowing amount			$ 35,000
Trade receivables securitization [Member]
Subsequent Event [Line Items]
Trade receivables securitization, maximum borrowing amount				$ 295,000
Number of commercial banks participating in trade receivables securitization agreement | banks				3
Trade receivables securitization [Member] | Subsequent Event [Member]
Subsequent Event [Line Items]
Trade receivables securitization, maximum borrowing amount						$ 330,000
Number of commercial banks participating in trade receivables securitization agreement | banks						4
Series of Individually Immaterial Business Acquisitions [Member]
Subsequent Event [Line Items]
Number of businesses acquired | businesses_acquired				5
Historical annual sales of acquired businesses				$ 33,000
Net cash paid for acquisitions	[1]			$ 26,182
Series of Individually Immaterial Business Acquisitions [Member] | Subsequent Event [Member]
Subsequent Event [Line Items]
Number of businesses acquired | businesses_acquired			4
Historical annual sales of acquired businesses			$ 41,000
Net cash paid for acquisitions	[1]		$ 70,000

[1] Includes cash paid, net of cash acquired, for current year acquisitions as well as payments for the settlement of holdback liabilities associated with prior year acquisitions.