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Goodwill and Other Intangible Assets Future amortizaion of intangibles (Details) (USD $)
In Thousands, unless otherwise specified
Mar. 31, 2013
Dec. 31, 2012
Goodwill and Intangible Assets Disclosure [Abstract]    
Finite-Lived Intangible Assets, Amortization Expense, Remainder of Fiscal Year $ 3,195  
2013 4,224  
2014 4,200  
2015 3,850  
2016 3,814  
Finite-Lived Intangible Assets, Amortization Expense, Year Five 927  
Thereafter 64,319  
Finite-Lived Intangible Assets, Net $ 84,529 $ 85,550