Goodwill and Intangible Assets - Additional Information (Detail) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2013 Segment	Dec. 31, 2012	Dec. 31, 2011
Acquired Finite-Lived Intangible Assets [Line Items]
Number of reportable segments goodwill is allocated	1
Weighted-average amortization period intangible assets	9 years 6 months
Amortization of intangible assets	$ 1,385	$ 1,024	$ 1,589
Acquired goodwill [Member]
Acquired Finite-Lived Intangible Assets [Line Items]
Number of reportable segments goodwill is allocated	1
Customer Lists [Member]
Acquired Finite-Lived Intangible Assets [Line Items]
Weighted-average amortization period intangible assets	9 years 6 months
Patents and Technology [Member]
Acquired Finite-Lived Intangible Assets [Line Items]
Weighted-average amortization period intangible assets	9 years 6 months
Trademarks [Member]
Acquired Finite-Lived Intangible Assets [Line Items]
Weighted-average amortization period intangible assets	8 years 8 months 12 days