Capitalized Software Costs (Details 1) (USD $) In Thousands, unless otherwise specified	6 Months Ended
	Sep. 30, 2013	Sep. 30, 2012
Activity related to net capitalized software costs
Balance as of April 1	$ 39,781	$ 19,994
Capitalized	15,295	14,117
Amortization	(5,303)	(4,879)
Balance as of June 30	49,773	29,232
Estimated amortization of capitalized software costs
2014 (remaining nine months)	8,000
2015	16,000
2016	14,100
2017	9,300
2018 and beyond	2,373
Total	$ 49,773