Other Borrowings (Narrative) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015
Short-term Debt [Line Items]
Reverse repurchase agreements	$ 5,000
Credit through FHLBA	143,615
FHLBA additional credit	31,249
Borrowed amount from FHLBA	39,500
Unsecured Federal Funds Outstanding Amount	0	$ 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