Summary of Operating Expense (Detail) (USD $) In Thousands, unless otherwise specified	12 Months Ended
Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Components of Other Income (Expense) [Line Items]
Selling	$ 32,929	$ 25,869	$ 23,318
General and administrative	33,536	29,715	21,429
Research, product development and regulatory	21,644	20,750	18,041
Freight, delivery and warehousing	27,503	25,468	21,054
Operating expenses	$ 115,612	$ 101,802	$ 83,842

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The aggregate total of expenses of managing and administering the affairs of an entity, including affiliates of the reporting entity, which are not directly or indirectly associated with the manufacture, sale or creation of a product or product line.

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Generally recurring costs associated with normal operations except for the portion of these expenses which can be clearly related to production and included in cost of sales or services. Includes selling, general and administrative expense.

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No definition available.

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- Definition

The aggregate costs incurred (1) in a planned search or critical investigation aimed at discovery of new knowledge with the hope that such knowledge will be useful in developing a new product or service, a new process or technique, or in bringing about a significant improvement to an existing product or process; or (2) to translate research findings or other knowledge into a plan or design for a new product or process or for a significant improvement to an existing product or process whether intended for sale or the entity's use, during the reporting period charged to research and development projects, including the costs of developing computer software up to the point in time of achieving technological feasibility, and costs allocated in accounting for a business combination to in-process projects deemed to have no alternative future use.

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Expenses recognized in the period that are directly related to the selling and distribution of products or services.

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Cost incurred during the reporting period in transporting goods and services to customers. Includes freight-out costs.

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