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Balance Sheet Details Other Non-Current Liabilities (Details) (USD $)
In Thousands, unless otherwise specified
Dec. 31, 2013
Dec. 31, 2012
Balance Sheet Details [Abstract]    
Unrecognized Tax Benefits $ 2,806 $ 5,871
Business Acquisition Contingent Consideration at Fair Value Long Term 4,340 0
Other Liabilities 1,772 2,166
Other Liabilities, Noncurrent $ 8,918 $ 8,037