Inventories (Details) (USD $) In Thousands, unless otherwise specified	Jun. 30, 2013	Dec. 31, 2012
Valuation Allowance [Line Items]
Inventory, Raw Materials, Gross	$ 86,908	$ 85,726
Inventory, Work in Process, Gross	46,067	40,945
Inventory, Finished Goods, Gross	78,718	69,830
Inventories, net	211,693	196,501
Inventory Valuation Reserve [Member]
Valuation Allowance [Line Items]
Valuation Allowances and Reserves, Balance	$ 5,568	$ 4,078