Capitalized Software Costs (Details) (USD $) In Thousands	Jun. 30, 2011	Mar. 31, 2011	Jun. 30, 2010	Mar. 31, 2010
Capitalized software development costs
Gross carrying amount	$ 54,636	$ 52,123
Accumulated amortization	(38,898)	(36,973)
Net capitalized software costs	$ 15,738	$ 15,150	$ 12,422	$ 11,546

For each balance sheet presented, the amount of accumulated amortization for capitalized computer software costs.

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Implementation Guide (Q and A)
-Number FAS86
-Paragraph 21

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 142
-Paragraph 45

+ Details

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Data Type:	xbrli:monetaryItemType
Balance Type:	credit
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- Definition

The carrying amount of gross capitalized computer software costs as of the balance sheet date.

+ Details

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Namespace Prefix:	us-gaap
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
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- Definition

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 Implementation Guide (Q and A)
-Number FAS86
-Paragraph 18

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 86
-Paragraph 11
-Subparagraph a

+ Details

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Balance Type:	debit
Period Type:	instant

- Details

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