Loans and the Allowance for Loan Losses, Activity In Period (Details) $ in Thousands		3 Months Ended			12 Months Ended
		Mar. 31, 2019 USD ($) Period		Mar. 31, 2018 USD ($)	Dec. 31, 2018 USD ($) Period		Mar. 31, 2019 USD ($) qtr		Dec. 31, 2018 USD ($)
Allowance for loan losses by segment [Roll Forward]
Beginning Balance		$ 10,111		$ 9,448	$ 9,448
Charges-offs		(435)			(2,842)
Recoveries		186			644
Provision for loan losses		226		525	2,861
Ending balance		10,088			10,111
Ending balance individually evaluated for impairment							$ 104		$ 116
Ending balance collectively evaluated for impairment							9,984		9,995
Ending balance purchased credit-impaired loans							0		0
Ending balance		$ 10,111		9,448	$ 10,111		10,088		10,111
Loan Balances [Abstract]
Ending balance individually evaluated for impairment							15,057		16,180
Ending balance collectively evaluated for impairment							747,746		757,738
Ending balance purchased credit-impaired loans							84		91
Ending balance	[1]						$ 762,887		774,009
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		$ 2,340		1,889	$ 1,889
Charges-offs		0			(81)
Recoveries		2			140
Provision for loan losses		(203)			392
Ending balance		2,139			2,340
Ending balance individually evaluated for impairment							$ 8		11
Ending balance collectively evaluated for impairment							2,131		2,329
Ending balance purchased credit-impaired loans							0		0
Ending balance		2,340		1,889	2,340		2,139		2,340
Loan Balances [Abstract]
Ending balance individually evaluated for impairment							287		298
Ending balance collectively evaluated for impairment							63,382		63,009
Ending balance purchased credit-impaired loans							84		91
Ending balance							63,753		63,398
Real Estate [Member]
Loan Balances [Abstract]
Ending balance purchased credit-impaired loans							84		91
Ending balance							526,971		532,824
Real Estate [Member] | Construction [Member]
Allowance for loan losses by segment [Roll Forward]
Beginning Balance		156		541	541
Charges-offs		0			0
Recoveries		0			0
Provision for loan losses		42			(385)
Ending balance		198			156
Ending balance individually evaluated for impairment							17		18
Ending balance collectively evaluated for impairment							181		138
Ending balance purchased credit-impaired loans							0		0
Ending balance		156		541	156		198		156
Loan Balances [Abstract]
Ending balance individually evaluated for impairment							445		509
Ending balance collectively evaluated for impairment							36,255		31,874
Ending balance purchased credit-impaired loans							0		0
Ending balance							36,700		32,383
Real Estate [Member] | Mortgage [Member]
Allowance for loan losses by segment [Roll Forward]
Beginning Balance	[2]	5,956		5,217	5,217
Charges-offs	[2]	(90)			(1,625)
Recoveries	[2]	75			158
Provision for loan losses	[2]	(25)			2,206
Ending balance	[2]	5,916			5,956
Ending balance individually evaluated for impairment	[2]						79		87
Ending balance collectively evaluated for impairment	[2]						5,837		5,869
Ending balance purchased credit-impaired loans	[2]						0		0
Ending balance	[2]	5,956		5,217	5,217		5,916		5,956
Loan Balances [Abstract]
Ending balance individually evaluated for impairment	[2]						14,325		15,373
Ending balance collectively evaluated for impairment	[2]						475,946		485,068
Ending balance purchased credit-impaired loans	[2]						0		0
Ending balance	[2]						490,271		500,441
Consumer [Member]
Allowance for loan losses by segment [Roll Forward]
Beginning Balance		1,354	[3]	1,644	1,644
Charges-offs		(212)	[3]		(769)
Recoveries		91	[3]		262
Provision for loan losses		202	[3]		217
Ending balance	[3]	1,435			1,354
Ending balance individually evaluated for impairment							0	[3]	0
Ending balance collectively evaluated for impairment							1,435	[3]	1,354
Ending balance purchased credit-impaired loans							0	[3]	0
Ending balance		1,354	[3]	1,644	1,354	[3]	1,435	[3]	1,354	[3]
Loan Balances [Abstract]
Ending balance individually evaluated for impairment							0	[3]	0
Ending balance collectively evaluated for impairment							164,414	[3]	169,138
Ending balance purchased credit-impaired loans							0	[3]	0
Ending balance							164,414	[3]	169,138
Other [Member]
Allowance for loan losses by segment [Roll Forward]
Beginning Balance		305		157	157
Charges-offs		(133)			(367)
Recoveries		18			84
Provision for loan losses		210			431
Ending balance		400			305
Ending balance individually evaluated for impairment							0		0
Ending balance collectively evaluated for impairment							400		305
Ending balance purchased credit-impaired loans							0		0
Ending balance		$ 305		$ 157	$ 157		400		305
Loan Balances [Abstract]
Ending balance individually evaluated for impairment							0		0
Ending balance collectively evaluated for impairment							7,749		8,649
Ending balance purchased credit-impaired loans							0		0
Ending balance							$ 7,749		$ 8,649

[1] Net deferred loan fees totaled $789 thousand and $864 thousand at March 31, 2019 and December 31, 2018, 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.