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Certain Balance Sheet Components Inventories (Details) (USD $)
In Thousands, unless otherwise specified
Sep. 30, 2013
Dec. 31, 2012
Inventories [Line Items]    
Materials $ 112,148 $ 92,038
Work in process 12,654 12,568
Finished goods 69,900 66,113
Total inventories $ 194,702 $ 170,719