Goodwill and Intangible Assets - Schedule of Goodwill (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Mar. 31, 2013	Mar. 31, 2012	Mar. 31, 2011
Goodwill [Roll Forward]
Balance at beginning of period			$ 160,210
Accumulated impairment losses			(144,999)
Goodwill, beginning balance	14,128	15,198	15,211
Impact of foreign currency translation	(1,070)	(13)
Goodwill, ending balance	14,128	15,198	15,211
HSG [Member]
Goodwill [Roll Forward]
Balance at beginning of period			135,298
Accumulated impairment losses			(120,087)
Goodwill, beginning balance	14,128	15,198	15,211
Impact of foreign currency translation	(1,070)	(13)
Goodwill, ending balance	14,128	15,198	15,211
RSG [Member]
Goodwill [Roll Forward]
Balance at beginning of period			24,912
Accumulated impairment losses			(24,912)
Goodwill, beginning balance	0	0	0
Impact of foreign currency translation	0	0
Goodwill, ending balance	$ 0	$ 0	$ 0