Inventories, net (Details) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013
Summary of Inventories
Raw materials	$ 78,924us-gaap_InventoryRawMaterials	$ 63,319us-gaap_InventoryRawMaterials
Work-in-process	16,195us-gaap_InventoryWorkInProcess	19,975us-gaap_InventoryWorkInProcess
Finished products	24,441us-gaap_InventoryFinishedGoods	9,205us-gaap_InventoryFinishedGoods
Total inventories	119,560us-gaap_InventoryGross	92,499us-gaap_InventoryGross
Less reserves	(2,553)us-gaap_InventoryValuationReserves	(2,314)us-gaap_InventoryValuationReserves
Total inventories, net	$ 117,007us-gaap_InventoryNet	$ 90,185us-gaap_InventoryNet

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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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 of valuation reserve for inventory.

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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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