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Debt (Details 1) (Senior secured term loan [Member], USD $)
In Thousands, unless otherwise specified
Dec. 31, 2012
Dec. 31, 2011
Senior secured term loan [Member]
   
Summary of future maturities of long term debt obligations    
2013     
2014     
2015     
2016     
2017     
Thereafter 210,000  
Financing Obligations, Total $ 210,000 $ 198,923