Loans and the Allowance for Loan Losses (Details) - USD ($) $ in Thousands		Sep. 30, 2018		Dec. 31, 2017
Allowance for Doubtful Accounts Receivable [Roll Forward]
Total loans, net of deferred fees	[1]	$ 779,435		$ 738,540
Less: Allowance for loan losses		(10,231)		(9,448)
Loans, net of allowance and deferred fees and costs	[1]	769,204		729,092
Net deferred loan fees		849		916
Overdrawn deposit accounts, excluding internal use accounts		605		424
Mortgage Loans on Real Estate [Member]
Allowance for Doubtful Accounts Receivable [Roll Forward]
Total loans, net of deferred fees		530,053		492,720
Mortgage Loans on Real Estate [Member] | Residential 1-4 Family [Member]
Allowance for Doubtful Accounts Receivable [Roll Forward]
Total loans, net of deferred fees		110,133		101,021
Mortgage Loans on Real Estate [Member] | Commercial [Member]
Allowance for Doubtful Accounts Receivable [Roll Forward]
Total loans, net of deferred fees		312,079		289,682
Mortgage Loans on Real Estate [Member] | Construction [Member]
Allowance for Doubtful Accounts Receivable [Roll Forward]
Total loans, net of deferred fees		32,898		27,489
Mortgage Loans on Real Estate [Member] | Second Mortgages [Member]
Allowance for Doubtful Accounts Receivable [Roll Forward]
Total loans, net of deferred fees		17,874		17,918
Mortgage Loans on Real Estate [Member] | Equity Line of Credit [Member]
Allowance for Doubtful Accounts Receivable [Roll Forward]
Total loans, net of deferred fees		57,069		56,610
Commercial [Member]
Allowance for Doubtful Accounts Receivable [Roll Forward]
Total loans, net of deferred fees		67,772		60,398
Commercial [Member] | Commercial and Industrial Loans [Member]
Allowance for Doubtful Accounts Receivable [Roll Forward]
Total loans, net of deferred fees		67,772		60,398
Consumer [Member]
Allowance for Doubtful Accounts Receivable [Roll Forward]
Total loans, net of deferred fees		170,898	[2]	174,225
Consumer [Member] | Consumer Automobile Loans [Member]
Allowance for Doubtful Accounts Receivable [Roll Forward]
Total loans, net of deferred fees		125,166		119,251
Consumer [Member] | Other Consumer Loans [Member]
Allowance for Doubtful Accounts Receivable [Roll Forward]
Total loans, net of deferred fees		45,732		54,974
Other [Member]
Allowance for Doubtful Accounts Receivable [Roll Forward]
Total loans, net of deferred fees		$ 10,712		$ 11,197

[1] Net deferred loan fees totaled $849 thousand and $916 thousand at September 30, 2018 and December 31, 2017, respectively.

[2] The consumer segment includes consumer automobile loans.