Inventories, Net and Significant Suppliers - Inventories, Net (Details) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Inventory Disclosure [Abstract]
Raw materials	$ 24,763us-gaap_InventoryRawMaterials	$ 18,990us-gaap_InventoryRawMaterials
Components	16,170us-gaap_OtherInventory	18,623us-gaap_OtherInventory
Work in process	2,622us-gaap_InventoryWorkInProcess	2,017us-gaap_InventoryWorkInProcess
Finished goods	56,458us-gaap_InventoryFinishedGoods	59,393us-gaap_InventoryFinishedGoods
Reserve for excess and obsolete inventory	(2,539)us-gaap_InventoryValuationReserves	(2,714)us-gaap_InventoryValuationReserves	(2,024)us-gaap_InventoryValuationReserves	(3,447)us-gaap_InventoryValuationReserves
Inventories, net	$ 97,474us-gaap_InventoryNet	$ 96,309us-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.

+ References

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-Publisher SEC

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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.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

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-Name Regulation S-X (SX)

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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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-Publisher SEC

-Name Regulation S-X (SX)

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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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