Goodwill And Other Intangible Assets Schedule of other intangible assets and related accumulated amortization (Details) (USD $) In Thousands, unless otherwise specified	6 Months Ended
	Sep. 30, 2012	Mar. 31, 2012
Finite-Lived Intangible Assets [Line Items]
Accumulated amortization	$ (1,983)	$ (1,579)
Total net intangible assets	12,805	13,165
Global Relationships [Member]
Finite-Lived Intangible Assets [Line Items]
Indefinite-Lived Intangible Assets (Excluding Goodwill)	7,400	7,400
Local Relationships [Member]
Finite-Lived Intangible Assets [Line Items]
Finite-lived intangible assets, gross	7,110	7,167
Accumulated amortization	(1,867)	(1,475)
Finite-lived intangible assets, net	5,243	5,692
Trade Names [Member]
Finite-Lived Intangible Assets [Line Items]
Finite-lived intangible assets, gross	50	50
Accumulated amortization	(45)	(36)
Finite-lived intangible assets, net	5	14
Existing Technology [Member]
Finite-Lived Intangible Assets [Line Items]
Finite-lived intangible assets, gross	66	66
Accumulated amortization	(66)	(66)
Finite-lived intangible assets, net	0	0
Amortization Period (in months and years)	6 months
Patents [Member]
Finite-Lived Intangible Assets [Line Items]
Finite-lived intangible assets, gross	162	61
Accumulated amortization	(5)	(2)
Finite-lived intangible assets, net	$ 157	$ 59
Amortization Period (in months and years)	20 years
Minimum [Member] | Local Relationships [Member]
Finite-Lived Intangible Assets [Line Items]
Amortization Period (in months and years)	7 years
Minimum [Member] | Trade Names [Member]
Finite-Lived Intangible Assets [Line Items]
Amortization Period (in months and years)	1 year
Maximum [Member] | Local Relationships [Member]
Finite-Lived Intangible Assets [Line Items]
Amortization Period (in months and years)	10 years
Maximum [Member] | Trade Names [Member]
Finite-Lived Intangible Assets [Line Items]
Amortization Period (in months and years)	3 years