Securities (Details 7) (USD $)
In Thousands, unless otherwise specified
Dec. 31, 2013
Dec. 31, 2012
Trading Securities    
Trading securities, at estimated fair value $ 10,991 $ 16,450
Obligations of U.S. Government sponsored entities
   
Trading Securities    
Trading securities, at estimated fair value 8,275 11,860
Residential Mortgage-backed securities U.S. Government sponsored entities
   
Trading Securities    
Trading securities, at estimated fair value $ 2,716 $ 4,590