Intangible Assets (Detail) (USD $) In Thousands, unless otherwise specified		3 Months Ended		3 Months Ended		3 Months Ended
May 08, 2012 Backlog	Mar. 31, 2013 Backlog Maximum	Mar. 31, 2013 Tradenames and Trademarks	May 08, 2012 Tradenames and Trademarks	Mar. 31, 2013 Technology	May 08, 2012 Technology	Mar. 31, 2013 Customer relationships	May 08, 2013 Customer relationships
Acquired Finite and Indefinite Lived Intangible Assets By Major Class [Line Items]
Intangible assets preliminarily, Amount	$ 900			$ 27,600		$ 15,300		$ 119,000
Intangible assets preliminarily, UsefulLife		1 year	20 years		12 years		10 years

Weighted average amortization period of finite-lived intangible assets acquired either individually or as part of a group of assets, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 350

-SubTopic 30

-Section 50

-Paragraph 1

-Subparagraph (a)(3)

-URI http://asc.fasb.org/extlink&oid=7658586&loc=d3e16265-109275

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration