Business Segments (Details Textual)	12 Months Ended
	Mar. 31, 2013 segment	Mar. 31, 2012	Mar. 31, 2011
Revenue, Major Customer [Line Items]
Number of reportable segments	2
International operations revenue as a percentage of total revenue	4.00%	5.00%	6.00%
RSG [Member]
Revenue, Major Customer [Line Items]
Major customer, percentage of revenue	12.70%