Capitalized Software Costs (Details 1) (USD $) In Thousands, unless otherwise specified	12 Months Ended
Mar. 31, 2012	Mar. 31, 2011	Mar. 31, 2010
Activity related to net capitalized software costs
Balance as of April 1	$ 15,150	$ 11,546
Additions to capitalized software costs	13,098	10,695	7,921
Amortization	(8,254)	(7,091)	(5,927)
Balance as of December 31	19,994	15,150	11,546
Estimated amortization of capitalized software costs
2013	9,088
2014	7,071
2015	3,609
2016	226
Total	$ 19,994

Capitalized computer software costs estimated amortization.

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- Definition

Capitalized computer software costs estimated amortization in year four.

+ References

No definition available.

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- Definition

Capitalized computer software costs estimated amortization in year one.

+ References

No definition available.

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- Definition

Capitalized computer software costs estimated amortization in year three.

+ References

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Capitalized computer software costs estimated amortization in year two.

+ References

No definition available.

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- Definition

Additions made to capitalized computer software costs during the period.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 350

-SubTopic 30

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For each income statement presented, the amount charged to expense for amortization of capitalized computer software costs.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

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-Name Accounting Standards Codification

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The carrying amount of capitalized computer software costs net of accumulated amortization as of the balance sheet date.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 985

-SubTopic 20

-Section 50

-Paragraph 2

-URI http://asc.fasb.org/extlink&oid=6501960&loc=d3e128487-111756

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-Publisher FASB

-Name Implementation Guide (Q and A)

-Number FAS86

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-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 3: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 86

-Paragraph 11

-Subparagraph a

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

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