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Goodwill and Purchased Intangible Assets - Summary of Estimated Future Amortization Expense (Details) (USD $)
In Thousands, unless otherwise specified
Jun. 30, 2014
Finite Lived Intangible Assets [Line Items]  
Remainder of 2014 $ 963
2015 1,862
2016 1,854
2017 1,418
2018 70
2019 and thereafter   
Net $ 6,167