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Balance Sheet Details - Other Non-Current Liabilities (Details) (USD $)
In Thousands, unless otherwise specified
Jun. 30, 2013
Dec. 31, 2012
Other Non-current Liabilities [Abstract]    
Unrecognized Tax Benefits $ 6,274 $ 5,871
Business Acquisition, Contingent Consideration, at Fair Value, Noncurrent 5,773 0
Other Liabilities 1,905 2,166
Other Liabilities, Noncurrent $ 13,952 $ 8,037