Goodwill And Other Intangible Assets (Changes In Goodwill) (Details) (USD $) In Thousands, unless otherwise specified	9 Months Ended
	Dec. 31, 2011
Goodwill [Line Items]
Goodwill, Acquired During Period	$ 27,826	[1]
Goodwill beginning balance	1,117,336
Acquisitions	27,826	[1]
Other adjustments, including foreign currency translation	(4,002)
Goodwill ending balance	1,141,160
Distribution Business Segment [Member]
Goodwill [Line Items]
Goodwill, Acquired During Period	17,734	[1]
Goodwill beginning balance	930,718
Acquisitions	17,734	[1]
Other adjustments, including foreign currency translation	(3,935)
Goodwill ending balance	944,517
All Other Operations Business Segment [Member]
Goodwill [Line Items]
Goodwill, Acquired During Period	10,092	[1]
Goodwill beginning balance	186,618
Acquisitions	10,092	[1]
Other adjustments, including foreign currency translation	(67)
Goodwill ending balance	$ 196,643

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