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Summary of Significant Accounting Policies (Details 1) (USD $)
In Thousands, unless otherwise specified
Dec. 31, 2012
Dec. 31, 2011
Raw materials $ 64,340 $ 72,145
Work-in-progress 13,621 14,722
Finished goods 18,071 33,615
Total inventories, net $ 96,032 $ 120,482