Goodwill and Intangible Assets (Details 1) (USD $) In Thousands, unless otherwise specified	Mar. 31, 2014	Mar. 31, 2013
Finite-Lived Intangible Assets [Line Items]
Finite-Lived Intangible Assets, Gross	$ 74,046	$ 41,836
Finite-Lived Intangible Assets, Accumulated Amortization	(41,690)	(36,773)
Finite-Lived Intangible Assets, Net	32,356	5,063
Backlog [Member]
Finite-Lived Intangible Assets [Line Items]
Finite-Lived Intangible Assets, Gross	1,510
Finite-Lived Intangible Assets, Accumulated Amortization	(1,510)
Finite-Lived Intangible Assets, Net	0
Customer Relationships [Member]
Finite-Lived Intangible Assets [Line Items]
Finite-Lived Intangible Assets, Gross	24,437	4,497
Finite-Lived Intangible Assets, Accumulated Amortization	(4,437)	(2,618)
Finite-Lived Intangible Assets, Net	20,000	1,879
Product Technology [Member]
Finite-Lived Intangible Assets [Line Items]
Finite-Lived Intangible Assets, Gross	45,234	36,964
Finite-Lived Intangible Assets, Accumulated Amortization	(35,404)	(34,132)
Finite-Lived Intangible Assets, Net	9,830	2,832
Noncompete Agreements [Member]
Finite-Lived Intangible Assets [Line Items]
Finite-Lived Intangible Assets, Gross	510
Finite-Lived Intangible Assets, Accumulated Amortization	(21)
Finite-Lived Intangible Assets, Net	489
Trademarks and Trade Names [Member]
Finite-Lived Intangible Assets [Line Items]
Finite-Lived Intangible Assets, Gross	2,355	375
Finite-Lived Intangible Assets, Accumulated Amortization	(318)	(23)
Finite-Lived Intangible Assets, Net	$ 2,037	$ 352