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Financial Instruments with Off-Balance-Sheet Risk (Schedule of Financial Instruments) (Details) (USD $)
In Thousands, unless otherwise specified
Sep. 30, 2014
Dec. 31, 2013
Commitments to extend credit [Member]
   
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items]    
Financial instruments off-balance sheet credit risks $ 395,368 $ 420,707
Standby letters of credit [Member]
   
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items]    
Financial instruments off-balance sheet credit risks 6,871 8,703
Commercial letters of credit [Member]
   
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items]    
Financial instruments off-balance sheet credit risks $ 7,592 $ 8,070