Acquisitions (Acquisitions Narrative) (Details) (USD $)	6 Months Ended
	Sep. 30, 2014
Business Acquisition [Line Items]
Goodwill acquired during period	$ 19,943,000	[1]
FY15 Acquisitions [Member]
Business Acquisition [Line Items]
Number of businesses acquired	8
Historical annual sales of acquired businesses	36,000,000
Business acquisition, transaction costs	1,000,000
Business combination, pro forma information, revenue of acquiree since acquisition date, actual	10,000,000
Fair value of trade receivables acquired	5,200,000
Gross contractual amounts of acquired receivables	5,700,000
Goodwill acquired during period	15,500,000
Goodwill deductible for income tax purposes	11,100,000
Business acquisition, pro forma information, description	Pro forma results of operations have not been presented for these acquisitions since the impact is not material to the Company’s consolidated statements of earnings, either individually or in aggregate
FY15 Acquisitions [Member] | Customer relationships [Member]
Business Acquisition [Line Items]
Other intangible assets acquired	6,700,000
FY15 Acquisitions [Member] | Non-competition agreements [Member]
Business Acquisition [Line Items]
Other intangible assets acquired	$ 2,600,000

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