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Other Borrowings (Narrative) (Details)
$ in Thousands
 12 Months Ended
Dec. 31, 2015
USD ($)
Short-term Debt [Line Items]  
Reverse repurchase agreements $ 5,000
Credit through FHLBA 105,493
Borrowed amount from FHLBA 30,000
Unsecured federal funds outstanding amount 0
Community Bankers Bank [Member]  
Short-term Debt [Line Items]  
Unsecured federal fund lines 11,000
Zions Bank [Member]  
Short-term Debt [Line Items]  
Unsecured federal fund lines 4,000
PNC Bank [Member]  
Short-term Debt [Line Items]  
Unsecured federal fund lines 6,000
Suntrust Bank [Member]  
Short-term Debt [Line Items]  
Unsecured federal fund lines $ 3,000
Maximum [Member]  
Short-term Debt [Line Items]  
Period allowed to exchange securities pledged as collateral for funds 90 days
Minimum [Member]  
Short-term Debt [Line Items]  
Period allowed to exchange securities pledged as collateral for funds 30 days