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Certain Balance Sheet Components Inventories (Details) (USD $)
In Thousands, unless otherwise specified
Mar. 31, 2014
Dec. 31, 2013
Inventories [Line Items]    
Materials $ 110,861 $ 102,596
Work in process 10,958 13,770
Finished goods 70,754 61,101
Total inventories $ 192,573 $ 177,467