| Inventories (Details) (USD $) In Thousands, unless otherwise specified | Mar. 31, 2015 | Dec. 31, 2014 | 
|---|---|---|
| Inventories [Abstract] | ||
| Finished goods | $ 72,235us-gaap_InventoryFinishedGoods | $ 66,779us-gaap_InventoryFinishedGoods | 
| Work-in-process | 7,927us-gaap_InventoryWorkInProcess | 7,815us-gaap_InventoryWorkInProcess | 
| Raw materials | 50,796us-gaap_InventoryRawMaterialsAndSupplies | 48,791us-gaap_InventoryRawMaterialsAndSupplies | 
| Total Inventory | $ 130,958us-gaap_InventoryNet | $ 123,385us-gaap_InventoryNet | 
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- Details 
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- Definition Amount before valuation and LIFO reserves of completed merchandise or goods expected to be sold within one year or operating cycle, if longer. Reference 1: http://www.xbrl.org/2003/role/presentationRef 
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- Definition Amount after valuation and LIFO reserves of inventory expected to be sold, or consumed within one year or operating cycle, if longer. Reference 1: http://www.xbrl.org/2003/role/presentationRef 
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- Definition Gross amount of unprocessed materials to be used in manufacturing or production process and supplies that will be consumed. Reference 1: http://www.xbrl.org/2003/role/presentationRef 
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- Definition 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. Reference 1: http://www.xbrl.org/2003/role/presentationRef 
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