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Intangible Assets, Maturity Schedule (Details) (USD $)
In Thousands, unless otherwise specified
3 Months Ended
Mar. 31, 2013
Finite-Lived Intangible Assets, Amortization Expense, Maturity Schedule [Abstract]  
2013 (April-December) $ 986
2014 1,091
2015 1,069
2016 1,028
2017 16
Total $ 4,190
Weighted average remaining useful life 3 years 7 months 2 days