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Federal Funds Purchased (Details) (USD $)
Dec. 31, 2013
Dec. 31, 2012
Banking and Thrift [Abstract]    
Outstanding federal funds purchased balance $ 0 $ 0
Federal home loan bank, advances, general debt obligations, disclosures, amount of available, unused funds 2,200,000,000  
Federal Reserve Bank Advances [Member]
   
Federal Funds Purchased [Line Items]    
Lines of credit 391,700,000  
Federal Funds Purchased [Member]
   
Federal Funds Purchased [Line Items]    
Lines of credit $ 185,000,000  
Minimum [Member]
   
Federal Funds Purchased [Line Items]    
Interest rate available lines of credit 0.30%  
Maximum [Member]
   
Federal Funds Purchased [Line Items]    
Interest rate available lines of credit 0.80%