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Commitments and Contingent Liabilities (Details) (USD $)
6 Months Ended 12 Months Ended
Jun. 30, 2014
Dec. 31, 2013
Loss Contingencies [Line Items]    
Inherent risks associated with off balance sheet commitments $ 1,400,000 $ 1,400,000
Commitments to Extend Credit [Member]
   
Loss Contingencies [Line Items]    
Amount of commitment 1,200,000,000  
Standby Letters of Credit [Member]
   
Loss Contingencies [Line Items]    
Amount of commitment $ 65,700,000  
Maximum [Member]
   
Loss Contingencies [Line Items]    
Expiry period of standby letter of credit, maximum (in years) 2 years