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Purchased Intangible Assets (Schedule Finite-Lived Intangible Assets, Future Amortization Expense) (Details) (USD $)
In Thousands, unless otherwise specified
Mar. 31, 2015
Goodwill and Intangible Assets Disclosure [Abstract]  
Remainder of 2015 $ 688us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseRemainderOfFiscalYear
2016 1,238us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearTwo
2017 1,239us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearThree
2018 1,195us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearFour
2019 39us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearFive
Thereafter 0us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseAfterYearFive
Net $ 4,399us-gaap_FiniteLivedIntangibleAssetsNet