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Goodwill and Intangible Assets - Intangible Assets (Parenthetical) (Detail) (Alter Power Systems [Member], USD $) In Thousands, unless otherwise specified	Mar. 12, 2013
Finite-Lived Intangible Assets [Line Items]
Acquisition purchase price	$ 2,447
Intangible asset in connection with acquisition	2,806
Completed Technology [Member]
Finite-Lived Intangible Assets [Line Items]
Intangible asset in connection with acquisition	2,208
Trade Names [Member]
Finite-Lived Intangible Assets [Line Items]
Intangible asset in connection with acquisition	$ 598

X

- Definition

The amount of identifiable intangible assets recognized as of the acquisition date.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 805

-SubTopic 20

-Section 50

-Paragraph 1

-Subparagraph (c)

-URI http://asc.fasb.org/extlink&oid=6910749&loc=d3e4845-128472



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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 805

-SubTopic 10

-Section 55

-Paragraph 37

-URI http://asc.fasb.org/extlink&oid=25498275&loc=d3e2207-128464

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X

- Definition

Amount recognized for assets, including goodwill, in excess of (less than) the aggregate liabilities assumed.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 805

-SubTopic 20

-Section 50

-Paragraph 1

-Subparagraph (c)

-URI http://asc.fasb.org/extlink&oid=6910749&loc=d3e4845-128472

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