Intangible Assets (Detail) (USD $) In Thousands, unless otherwise specified	1 Months Ended
	May 31, 2012	May 08, 2012
Acquired Finite And Indefinite Lived Intangible Assets By Major Class [Line Items]
Intangible assets		$ 162,100
Backlog
Acquired Finite And Indefinite Lived Intangible Assets By Major Class [Line Items]
Intangible assets		900
Backlog | Maximum
Acquired Finite And Indefinite Lived Intangible Assets By Major Class [Line Items]
Intangible assets, useful life	1 year
Tradenames and Trademarks
Acquired Finite And Indefinite Lived Intangible Assets By Major Class [Line Items]
Intangible assets		27,600
Intangible assets, useful life	20 years
Technology
Acquired Finite And Indefinite Lived Intangible Assets By Major Class [Line Items]
Intangible assets		15,300
Intangible assets, useful life	12 years
Customer relationships
Acquired Finite And Indefinite Lived Intangible Assets By Major Class [Line Items]
Intangible assets		$ 118,300
Intangible assets, useful life	10 years