Loans and the Allowance for Loan Losses, Activity In Period (Details) $ in Thousands		3 Months Ended		9 Months Ended		12 Months Ended
		Sep. 30, 2019 USD ($)	Sep. 30, 2018 USD ($)	Sep. 30, 2019 USD ($) Period	Sep. 30, 2018 USD ($)	Dec. 31, 2018 USD ($) Period	Sep. 30, 2019 USD ($) qtr	Dec. 31, 2018 USD ($)
Allowance for loan losses by segment [Roll Forward]
Beginning Balance				$ 10,111	$ 9,448	$ 9,448
Charges-offs				(1,005)		(2,842)
Recoveries				493		644
Provision for loan losses		$ 0	$ 749	1,013	1,849	2,861
Ending balance		10,612		10,612		10,111
Individually evaluated for impairment							$ 874	$ 116
Collectively evaluated for impairment							9,738	9,995
Purchased credit-impaired loans							0	0
Ending balance		10,612		$ 10,111	9,448	$ 9,448	10,612	10,111
Loan Balances [Abstract]
Individually evaluated for impairment							11,361	16,180
Collectively evaluated for impairment							729,366	757,738
Purchased credit-impaired loans							83	91
Ending balance							$ 740,810	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 and Industrial [Member]
Allowance for loan losses by segment [Roll Forward]
Beginning Balance				$ 2,340	1,889	$ 1,889
Charges-offs				0		(81)
Recoveries				8		140
Provision for loan losses				(1,022)		392
Ending balance		1,326		1,326		2,340
Individually evaluated for impairment							$ 0	11
Collectively evaluated for impairment							1,326	2,329
Purchased credit-impaired loans							0	0
Ending balance		1,326		2,340	1,889	1,889	1,326	2,340
Loan Balances [Abstract]
Individually evaluated for impairment							430	298
Collectively evaluated for impairment							69,199	63,009
Purchased credit-impaired loans							83	91
Ending balance							69,712	63,398
Real Estate [Member]
Loan Balances [Abstract]
Purchased credit-impaired loans							83	91
Ending balance							519,943	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				99		(385)
Ending balance		255		255		156
Individually evaluated for impairment							15	18
Collectively evaluated for impairment							240	138
Purchased credit-impaired loans							0	0
Ending balance		255		156	541	156	255	156
Loan Balances [Abstract]
Individually evaluated for impairment							89	509
Collectively evaluated for impairment							40,107	31,874
Purchased credit-impaired loans							0	0
Ending balance							40,196	32,383
Real Estate [Member] | Mortgage [Member]
Allowance for loan losses by segment [Roll Forward]
Beginning Balance	[1]			5,956	5,217	5,217
Charges-offs	[1]			(166)		(1,625)
Recoveries	[1]			190		158
Provision for loan losses	[1]			337		2,206
Ending balance	[1]	6,317		6,317		5,956
Individually evaluated for impairment	[1]						859	87
Collectively evaluated for impairment	[1]						5,458	5,869
Purchased credit-impaired loans	[1]						0	0
Ending balance	[1]	6,317		5,956	5,217	5,217	6,317	5,956
Loan Balances [Abstract]
Individually evaluated for impairment	[1]						10,820	15,373
Collectively evaluated for impairment	[1]						468,927	485,068
Purchased credit-impaired loans	[1]						0	0
Ending balance	[1]						479,747	500,441
Consumer [Member]
Allowance for loan losses by segment [Roll Forward]
Beginning Balance	[2]			1,354	1,644	1,644
Charges-offs	[2]			(512)		(769)
Recoveries	[2]			244		262
Provision for loan losses	[2]			677		217
Ending balance	[2]	1,763		1,763		1,354
Individually evaluated for impairment	[2]						0	0
Collectively evaluated for impairment	[2]						1,763	1,354
Purchased credit-impaired loans	[2]						0	0
Ending balance	[2]	1,763		1,354	1,644	1,644	1,763	1,354
Loan Balances [Abstract]
Individually evaluated for impairment	[2]						22	0
Collectively evaluated for impairment	[2]						141,599	169,138
Purchased credit-impaired loans	[2]						0	0
Ending balance	[2]						141,621	169,138
Other [Member]
Allowance for loan losses by segment [Roll Forward]
Beginning Balance				305	157	157
Charges-offs				(327)		(367)
Recoveries				51		84
Provision for loan losses				697		431
Ending balance		726		726		305
Individually evaluated for impairment							0	0
Collectively evaluated for impairment							726	305
Purchased credit-impaired loans							0	0
Ending balance		726		305	157	157	726	305
Loan Balances [Abstract]
Individually evaluated for impairment							0	0
Collectively evaluated for impairment							9,534	8,649
Purchased credit-impaired loans							0	0
Ending balance							9,534	8,649
Unallocated [Member]
Allowance for loan losses by segment [Roll Forward]
Beginning Balance				0	0	0
Charges-offs				0		0
Recoveries				0		0
Provision for loan losses				225		0
Ending balance		225		225		0
Individually evaluated for impairment							0	0
Collectively evaluated for impairment							225	0
Purchased credit-impaired loans							0	0
Ending balance		$ 225		$ 0	$ 0	$ 0	225	0
Loan Balances [Abstract]
Individually evaluated for impairment							0	0
Collectively evaluated for impairment							0	0
Purchased credit-impaired loans							0	0
Ending balance							$ 0	$ 0

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

[2] The consumer segment includes consumer automobile loans.