Capitalized Software Costs (Details 1) (USD $) In Thousands, unless otherwise specified	9 Months Ended
	Dec. 31, 2012	Dec. 31, 2011
Activity related to net capitalized software costs
Balance as of April 1	$ 19,994	$ 15,150
Capitalized	20,148	9,577
Amortization	(7,261)	(5,994)
Balance as of June 30	32,881	18,733
Estimated amortization of capitalized software costs
For the year ended March 31, 2013 (remaining nine months)	2,841
2014	13,387
2015	9,931
2016	5,547
2017 and beyond	1,175
Total	$ 32,881