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Purchased Intangible Assets (Schedule Finite-Lived Intangible Assets, Future Amortization Expense) (Details) (USD $)
In Thousands, unless otherwise specified
Mar. 31, 2013
Goodwill and Intangible Assets Disclosure [Abstract]  
Remainder of 2013 $ 785
2014 1,466
2015 1,316
2016 1,172
2017 1,172
Thereafter 1,122
Net $ 7,033