Intangible Assets (Details 1) (USD $) In Thousands	3 Months Ended
	Jun. 30, 2011	Jun. 30, 2010
Activity Related to the intangible assets
Balance as of April 1	$ 16,890	$ 20,145
Acquisition	1,930
Amortization	(901)	(765)
Balance as of June 30	17,919	19,380
Customer Relationships [Member]
Activity Related to the intangible assets
Balance as of April 1	6,327	7,849
Acquisition	1,100
Amortization	(442)	(307)
Balance as of June 30	6,985	7,542
Trade Name [Member]
Activity Related to the intangible assets
Balance as of April 1	208	368
Amortization	(40)	(40)
Balance as of June 30	168	328
Software Technology [Member]
Activity Related to the intangible assets
Balance as of April 1	10,355	11,928
Acquisition	830
Amortization	(419)	(418)
Balance as of June 30	$ 10,766	$ 11,510