Inventories (Summary of Inventories) (Detail) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013
Disclosure Inventories [Abstract]
Raw materials	$ 21,248us-gaap_InventoryRawMaterials	$ 11,944us-gaap_InventoryRawMaterials
Work in process	15,753us-gaap_InventoryWorkInProcess	14,546us-gaap_InventoryWorkInProcess
Finished goods	15,348	9,537
Inventory, Gross, Total	52,349us-gaap_InventoryGross	36,027us-gaap_InventoryGross
Less: Progress billings	(1,108)us-gaap_InventoryAdjustments	(1,110)us-gaap_InventoryAdjustments
Total inventories	$ 51,241us-gaap_InventoryNet	$ 34,917us-gaap_InventoryNet

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Certain changes made in the current period to the value and amount of inventory reported.

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Carrying amount, net of valuation reserves and adjustments, as of the balance sheet date of merchandise or goods held by the company that are readily available for sale.

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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 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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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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