Share Based Awards (Details Textual) (USD $) In Thousands, except Share data, unless otherwise specified	12 Months Ended				12 Months Ended											12 Months Ended							12 Months Ended
	Mar. 31, 2013	Mar. 31, 2012	Mar. 31, 2011	Mar. 31, 2010	Mar. 31, 2013 Employee Stock Option [Member]	Mar. 31, 2013 Restricted Stock Units Award [Member]	Mar. 31, 2012 Restricted Stock Units Award [Member]	Mar. 31, 2011 Restricted Stock Units Award [Member]	Mar. 31, 2013 Employee Option [Member]	Mar. 31, 2012 Employee Option [Member]	Mar. 31, 2011 Employee Option [Member]	Mar. 31, 2013 Director Options [Member]	Mar. 31, 2012 Director Options [Member]	Mar. 31, 2012 1998 Plan [Member]	Sep. 30, 1998 1998 Plan [Member]	Mar. 31, 2013 2005 Stock Options Plan [Member]	Mar. 31, 2012 2005 Stock Options Plan [Member]	Mar. 31, 2011 2005 Stock Options Plan [Member]	Oct. 31, 2005 2005 Stock Options Plan [Member]	May 25, 2011 Performance Based Award [Member]	May 25, 2011 Performance Based Award [Member] Executive Officer [Member]	May 25, 2011 Performance Based Award [Member] Non Executive Employees [Member]	Mar. 31, 2012 Performance Shares [Member]	Mar. 31, 2011 Performance Shares [Member]
Share Based Awards (Textual) [Abstract]
Common stock reserved															8,000,000				4,800,000
Outstanding options under 1998 and 2005 plan	1,159,000	988,000	1,398,000	1,744,000										40,000			1,119,183
Shares available for future grants																	3,012,491			600,000
Weighted-average grant date fair value of stock options	$ 8.22	$ 13.32	$ 9.24
Annualized forfeiture rate									8.00%	4.10%	3.60%	0.00%	0.00%
Options granted under 2005 plan	557,000	459,000	110,000													556,500	459,400	110,000
Maximum number of options available under the equity incentive program																					220,000	380,000
Total unrecognized compensation costs					$ 5,575	$ 529
Stock option recognized over weighted average period					3 years 6 months 30 days	1 year 7 months 30 days
Fair value of options vested	1,696	2,256	2,442
Compensation expense	$ 2,327	$ 3,321	$ 3,748			$ 566	$ 540	$ 427															$ 616	$ 788