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Certain Balance Sheet Components Inventories (Details) (USD $)
In Thousands, unless otherwise specified
Sep. 30, 2014
Dec. 31, 2013
Inventories [Line Items]    
Materials $ 101,607 $ 102,596
Work in process 11,694 13,770
Finished goods 77,388 61,101
Total inventories $ 190,689 $ 177,467