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Balance Sheet Details - Other Non-Current Liabilities (Details) (USD $)
In Thousands, unless otherwise specified
Jun. 30, 2014
Dec. 31, 2013
Other Non-current Liabilities [Abstract]    
Unrecognized Tax Benefits $ 3,526 $ 2,806
Contingent consideration - Acquisition non-current liability 3,962 4,340
Other Liabilities 1,915 1,772
Other Liabilities, Noncurrent $ 9,403 $ 8,918