Acquisitions and Divestitures (Acquisitions Narrative) (Details) (USD $)	9 Months Ended		3 Months Ended	9 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2012 FY13 Acquisitions [Member] businesses_acquired	Dec. 31, 2012 FY13 Acquisitions [Member] businesses_acquired	Dec. 31, 2011 FY12 Acquisitions [Member] businesses_acquired	Dec. 31, 2012 Trade Accounts Receivable [Member] FY13 Acquisitions [Member]	Dec. 31, 2012 Customer relationships [Member] FY13 Acquisitions [Member]	Dec. 31, 2012 Non-competition agreements [Member] FY13 Acquisitions [Member]
Business Acquisition [Line Items]
Number of businesses acquired			7	15	6
Business Acquisition, Revenue Reported by Acquired Entity for Last Annual Period			$ 75,000,000	$ 94,000,000	$ 73,000,000
Business acquisitions and holdback settlements	94,630,000	96,970,000	76,200,000	94,600,000	97,000,000
Business Combination, Integration Related Costs				1,000,000	1,700,000
Business Combination, Revenue of Acquiree since Acquisition Date, Actual				10,000,000	43,000,000
Business Combination, Acquired Receivables, Fair Value						9,700,000
Business Combination, Acquired Receivables, Gross Contractual Amount						10,100,000
Business Acquisition, Purchase Price Allocation, Goodwill, Expected Tax Deductible Amount			37,900,000	37,900,000
Business Acquisition, Purchase Price Allocation, Amortizable Intangible Assets	$ 37,188,000						$ 28,800,000	$ 9,600,000