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General and Summary of Significant Accounting Policies Inventory (Details) - USD ($)
$ in Thousands
Dec. 31, 2015
Dec. 31, 2014
Summary of Significant Accounting Policies [Abstract]    
Raw Materials $ 24,681 $ 23,006
Work in Process 4,282 3,546
Finished Goods 14,669 10,381
Total $ 43,632 $ 36,933