Acquisitions and Divestitures (Acquisitions Narrative) (Details) (USD $)	9 Months Ended
	Dec. 31, 2013		Dec. 31, 2013 FY14 Acquisitions [Member] businesses_acquired	Dec. 31, 2013 FY14 Acquisitions [Member] Customer Relationships [Member]	Dec. 31, 2013 FY14 Acquisitions [Member] Non-competition agreements [Member]	Dec. 31, 2013 The Encompass Gas Group, Inc. [Member] locations	Dec. 31, 2012 FY13 Acquisitions [Member] businesses_acquired
Business Acquisition [Line Items]
Net cash paid for acquired businesses and settlement of holdback liabilities and contingent consideration			$ 181,100,000				$ 94,600,000
Number of businesses acquired			9				15
Historical annual sales of acquired businesses			70,000,000			55,000,000	94,000,000
Number of locations						11
Transaction and other integration costs			1,000,000				1,000,000
Net sales from current year acquisitions			14,000,000				10,000,000
Fair value of trade receivables acquired			7,700,000
Gross contractual amounts of acquired receivables			8,100,000
Goodwill acquired during period	82,153,000	[1]	80,100,000
Goodwill deductible for income tax purposes			76,500,000
Other intangible assets acquired				$ 53,500,000	$ 2,800,000

[1] Includes acquisitions completed during the current year and adjustments made to prior year acquisitions.