Loans and the Allowance for Loan Losses, Activity In Period (Details) $ in Thousands		3 Months Ended			6 Months Ended			12 Months Ended
		Jun. 30, 2018 USD ($)		Jun. 30, 2017 USD ($)	Jun. 30, 2018 USD ($) Period		Jun. 30, 2017 USD ($)	Dec. 31, 2017 USD ($) Period		Jun. 30, 2018 USD ($) qtr		Dec. 31, 2017 USD ($)
Allowance for loan losses by segment [Roll Forward]
Beginning Balance					$ 9,448		$ 8,245	$ 8,245
Charges-offs					(1,007)			(3,287)
Recoveries					332			330
Provision for loan losses		$ 575		$ 1,000	1,100		1,650	4,160
Ending balance		9,873			9,873			9,448
Ending balances individually evaluated for impairment										$ 320		$ 95
Ending balances collectively evaluated for impairment										9,553		9,353
Ending balance acquired impaired loans										0
Ending balance		9,873			$ 9,448		8,245	$ 8,245		9,873		9,448
Loan Balances [Abstract]
Ending balance individually evaluated for impairment										18,000		18,475
Ending balance collectively evaluated for impairment										757,759		720,065
Ending balance acquired impaired loans										458
Ending balance	[1]									$ 776,217		738,540
Changes in Accounting Methodology [Abstract]
Number of migration periods | Period					8			8
Number of quarters remains on each migration period | qtr										12
Commercial [Member]
Allowance for loan losses by segment [Roll Forward]
Beginning Balance					$ 1,889		1,493	$ 1,493
Charges-offs					(81)			(807)
Recoveries					67			37
Provision for loan losses					443			1,166
Ending balance		2,318			2,318			1,889
Ending balances individually evaluated for impairment										$ 0		0
Ending balances collectively evaluated for impairment										2,318		1,889
Ending balance acquired impaired loans										0
Ending balance		2,318			1,889		1,493	1,889		2,318		1,889
Loan Balances [Abstract]
Ending balance individually evaluated for impairment										319		836
Ending balance collectively evaluated for impairment										64,274		59,562
Ending balance acquired impaired loans										108
Ending balance										64,701		60,398
Real Estate [Member]
Loan Balances [Abstract]
Ending balance acquired impaired loans										458
Ending balance										521,388		492,720
Real Estate [Member] | Construction [Member]
Allowance for loan losses by segment [Roll Forward]
Beginning Balance					541		846	846
Charges-offs					0			0
Recoveries					0			104
Provision for loan losses					(258)			(409)
Ending balance		283			283			541
Ending balances individually evaluated for impairment										20		18
Ending balances collectively evaluated for impairment										263		523
Ending balance acquired impaired loans										0
Ending balance		283			541		846	541		283		541
Loan Balances [Abstract]
Ending balance individually evaluated for impairment										815		813
Ending balance collectively evaluated for impairment										36,114		26,676
Ending balance acquired impaired loans										0
Ending balance										36,929		27,489
Real Estate [Member] | Mortgage [Member]
Allowance for loan losses by segment [Roll Forward]
Beginning Balance	[2]				5,217		5,267	5,267
Charges-offs	[2]				(422)			(1,934)
Recoveries	[2]				80			45
Provision for loan losses	[2]				732			1,839
Ending balance	[2]	5,607			5,607			5,217
Ending balances individually evaluated for impairment	[2]									300		77
Ending balances collectively evaluated for impairment	[2]									5,307		5,140
Ending balance acquired impaired loans	[2]									0
Ending balance	[2]	5,607			5,217		5,267	5,217		5,607		5,217
Loan Balances [Abstract]
Ending balance individually evaluated for impairment	[2]									16,866		16,826
Ending balance collectively evaluated for impairment	[2]									467,243		448,405
Ending balance acquired impaired loans	[2]									350
Ending balance	[2]									484,459		465,231
Consumer [Member]
Allowance for loan losses by segment [Roll Forward]
Beginning Balance					1,644	[3]	455	455
Charges-offs					(344)	[3]		(279)
Recoveries					139	[3]		56
Provision for loan losses					60	[3]		1,412
Ending balance	[3]	1,499			1,499			1,644
Ending balances individually evaluated for impairment										0	[3]	0
Ending balances collectively evaluated for impairment										1,499	[3]	1,644
Ending balance acquired impaired loans	[3]									0
Ending balance		1,499	[3]		1,644	[3]	455	1,644	[3]	1,499	[3]	1,644	[3]
Loan Balances [Abstract]
Ending balance individually evaluated for impairment										0	[3]	0
Ending balance collectively evaluated for impairment										177,975	[3]	174,225
Ending balance acquired impaired loans	[3]									0
Ending balance										177,975	[3]	174,225
Other [Member]
Allowance for loan losses by segment [Roll Forward]
Beginning Balance					157		184	184
Charges-offs					(160)			(267)
Recoveries					46			88
Provision for loan losses					123			152
Ending balance		166			166			157
Ending balances individually evaluated for impairment										0		0
Ending balances collectively evaluated for impairment										166		157
Ending balance acquired impaired loans										0
Ending balance		$ 166			$ 157		$ 184	$ 157		166		157
Loan Balances [Abstract]
Ending balance individually evaluated for impairment										0		0
Ending balance collectively evaluated for impairment										12,153		11,197
Ending balance acquired impaired loans										0
Ending balance										$ 12,153		$ 11,197

[1] Net deferred loan fees totaled $925 thousand and $916 thousand at June 30, 2018 and December 31, 2017, respectively.

[2] The real estate-mortgage segment includes residential 1 - 4 family, commercial real estate, second mortgages and equity lines of credit.

[3] The consumer segment includes consumer automobile loans.