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Term of assets acquired under capital lease arrangement.

+ References

No definition available.

+ Details

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- Definition

The total gross amount less the charge for the use of the long-lived depreciable assets subject to a lease meeting the criteria for capitalization.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 840

-SubTopic 30

-Section 50

-Paragraph 1

-Subparagraph (a)

-URI http://asc.fasb.org/extlink&oid=6455398&loc=d3e45280-112737

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- Definition

When presenting a range of interest rates, the highest effective rate for funds borrowed under the debt agreement as of the balance sheet date.

+ References

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

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 02

-Paragraph 22

-Article 5

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 210

-SubTopic 10

-Section S99

-Paragraph 1

-Subparagraph (SX 210.5-02.22(a)(1))

-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

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- Definition

When presenting a range of interest rates, the lowest effective rate for funds borrowed under the debt agreement as of the balance sheet date.

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Lease Financing Obligations - Additional Information (Detail) (Design Tools [Member], USD $) In Millions, unless otherwise specified	6 Months Ended
	Sep. 30, 2012	Jul. 31, 2012	Dec. 31, 2011	Oct. 31, 2011	Jun. 30, 2010	Dec. 31, 2009	Jul. 31, 2009
Design Tools [Member]
Lease Financing Obligations [Line Items]
Engineering design tools acquired under capital lease arrangement		$ 1.6	$ 4.5	$ 5.8	$ 1.0	$ 1.3	$ 1.1
Lease financing obligations effective interest rate percent, Minimum	2.00%
Lease financing obligations effective interest rate percent, Maximum	7.25%
Term of license for engineering design tools acquired under capital lease arrangement		3 years	3 years	3 years	3 years	28 months	3 years