Intangible Assets (Details 1) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Mar. 31, 2013		Mar. 31, 2012		Mar. 31, 2011
Activity Related to the intangible assets
Beginning Balance	$ 23,259		$ 16,890
Acquisition	11,850		10,870
Amortization	(7,559)	[1]	(4,501)	[1]	(3,255)
Ending Balance	27,550		23,259		16,890
Customer Relationships [Member]
Activity Related to the intangible assets
Beginning Balance	7,805		6,327
Acquisition	9,450		3,500
Amortization	(4,127)	[1]	(2,022)	[1]
Ending Balance	13,128		7,805
Trade Name [Member]
Activity Related to the intangible assets
Beginning Balance	162		208
Acquisition	1,250		130
Amortization	(506)	[1]	(176)	[1]
Ending Balance	906		162
Software Technology [Member]
Activity Related to the intangible assets
Beginning Balance	15,292		10,355
Acquisition	1,150		7,240
Amortization	(2,926)	[1]	(2,303)	[1]
Ending Balance	$ 13,516		$ 15,292

[1] Amortization of the customer relationships and trade name intangible assets is included in operating expenses and amortization of the software technology intangible assets is included in cost of revenue for software and hardware.