Capitalized Software Costs (Details 1) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Jun. 30, 2012	Jun. 30, 2011
Activity related to net capitalized software costs
Balance as of April 1	$ 19,994	$ 15,150
Capitalized	4,333	2,513
Amortization	(2,462)	(1,925)
Balance as of June 30	21,865	15,738
Estimated amortization of capitalized software costs
For the year ended March 31, 2013 (remaining nine months)	7,119
2014	8,395
2015	4,786
2016	1,444
2017 and beyond	121
Total	$ 21,865