Inventories, Net and Significant Suppliers (Details) (USD $) In Thousands, unless otherwise specified	Mar. 31, 2015	Dec. 31, 2014	Mar. 31, 2014	Dec. 31, 2013
Inventory Disclosure [Abstract]
Raw materials	$ 29,253us-gaap_InventoryRawMaterials	$ 24,763us-gaap_InventoryRawMaterials
Components	14,839us-gaap_OtherInventory	16,170us-gaap_OtherInventory
Work in process	4,927us-gaap_InventoryWorkInProcess	2,622us-gaap_InventoryWorkInProcess
Finished goods	53,699us-gaap_InventoryFinishedGoods	56,458us-gaap_InventoryFinishedGoods
Reserve for excess and obsolete inventory	(2,537)us-gaap_InventoryValuationReserves	(2,539)us-gaap_InventoryValuationReserves	(2,598)us-gaap_InventoryValuationReserves	(2,714)us-gaap_InventoryValuationReserves
Inventories, net	$ 100,181us-gaap_InventoryNet	$ 97,474us-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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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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Amount before valuation and LIFO reserves of other inventory expected to be sold, or consumed within one year or operating cycle, if longer.

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