Segment Information (Schedule Of Revenue By Major Customers) (Details)	12 Months Ended
	Mar. 31, 2013	Mar. 31, 2012		Mar. 31, 2011
Customer A [Member]
Revenue, Major Customer [Line Items]
Percentage of Revenue	16.00%	16.00%		14.00%
Customer B [Member]
Revenue, Major Customer [Line Items]
Percentage of Revenue	15.00%	14.00%		11.00%
Customer C [Member]
Revenue, Major Customer [Line Items]
Percentage of Revenue	14.00%		[1]	11.00%

[1] Less than 10%