Purchase of Beall Intangible Assets (Detail) (USD $) In Thousands, unless otherwise specified	1 Months Ended
	Feb. 04, 2013
Acquired Finite and Indefinite Lived Intangible Assets By Major Class [Line Items]
Intangible assets preliminarily, Amount	$ 8,860
Tradenames and Trademarks
Acquired Finite and Indefinite Lived Intangible Assets By Major Class [Line Items]
Intangible assets preliminarily, Amount	1,622
Intangible assets preliminarily, UsefulLife	20 years
Technology
Acquired Finite and Indefinite Lived Intangible Assets By Major Class [Line Items]
Intangible assets preliminarily, Amount	1,217
Intangible assets preliminarily, UsefulLife	8 years
Customer relationships
Acquired Finite and Indefinite Lived Intangible Assets By Major Class [Line Items]
Intangible assets preliminarily, Amount	$ 6,021
Intangible assets preliminarily, UsefulLife	8 years