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Other Financial Statement Information - Inventories - Net (Detail) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013
Inventory Disclosure [Abstract]
Finished products	$ 41,634us-gaap_InventoryFinishedGoods	$ 37,301us-gaap_InventoryFinishedGoods
Work-in-process	7,964us-gaap_InventoryWorkInProcess	7,779us-gaap_InventoryWorkInProcess
Raw materials	40,423us-gaap_InventoryRawMaterials	40,251us-gaap_InventoryRawMaterials
Inventory, gross	90,021us-gaap_InventoryGross	85,331us-gaap_InventoryGross
Excess of current cost over LIFO cost	(4,471)us-gaap_InventoryLIFOReserve	(4,146)us-gaap_InventoryLIFOReserve
Noncurrent portion of inventory	(5,513)us-gaap_InventoryNoncurrent	(7,350)us-gaap_InventoryNoncurrent
Inventories - net	$ 80,037us-gaap_InventoryNet	$ 73,835us-gaap_InventoryNet

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Amount before valuation and LIFO reserves of completed merchandise or goods expected to be sold within one year or operating cycle, if longer.

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-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

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-Name Accounting Standards Codification

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-Subparagraph (SX 210.5-02.6(a)(1))

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Gross amount, as of the balance sheet date, of merchandise, goods, commodities, or supplies held for future sale or to be used in manufacturing, servicing or production process.

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Amount of difference between inventory at lower of LIFO cost or market and inventory at lower of other inventory accounting method cost or market, for example, but not limited to, FIFO or average cost.

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Amount after valuation and LIFO reserves of inventory expected to be sold, or consumed within one year or operating cycle, if longer.

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Inventories not expected to be converted to cash, sold or exchanged within the normal operating cycle.

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Amount before valuation and LIFO reserves of raw materials expected to be sold, or consumed within one year or operating cycle, if longer.

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Amount before valuation and LIFO reserves of merchandise or goods in the production process expected to be completed within one year or operating cycle, if longer.

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