Loans and the Allowance for Loan Losses, Activity In Period (Details) - USD ($) $ in Thousands		3 Months Ended		9 Months Ended		12 Months Ended
		Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016	Dec. 31, 2016	Sep. 30, 2017	Dec. 31, 2016
Allowance for loan losses by segment [Roll Forward]
Beginning Balance				$ 8,245	$ 7,738	$ 7,738
Charges-offs				(2,466)		(1,770)
Recoveries				247		347
Provision for loan losses		$ 1,275	$ (100)	2,925	1,300	1,930
Ending balance		8,951		8,951		8,245
Ending balances individually evaluated for impairment							$ 439	$ 800
Ending balances collectively evaluated for impairment							8,512	7,445
Ending balance		8,951		8,245	7,738	8,245	8,951	8,245
Loan Balances [Abstract]
Ending balance individually evaluated for impairment							15,109	20,056
Ending balance collectively evaluated for impairment							685,887	583,826
Ending balance							700,996	603,882
Commercial [Member]
Allowance for loan losses by segment [Roll Forward]
Beginning Balance				1,493	633	633
Charges-offs				(629)		(915)
Recoveries				32		79
Provision for loan losses				679		1,696
Ending balance		1,575		1,575		1,493
Ending balances individually evaluated for impairment							183	271
Ending balances collectively evaluated for impairment							1,392	1,222
Ending balance		1,575		1,493	633	633	1,575	1,493
Loan Balances [Abstract]
Ending balance individually evaluated for impairment							771	989
Ending balance collectively evaluated for impairment							59,232	53,445
Ending balance							60,003	54,434
Real Estate - Construction [Member]
Allowance for loan losses by segment [Roll Forward]
Beginning Balance				846	985	985
Charges-offs				0		0
Recoveries				104		3
Provision for loan losses				(332)		(142)
Ending balance		618		618		846
Ending balances individually evaluated for impairment							18	22
Ending balances collectively evaluated for impairment							600	824
Ending balance		618		846	985	846	618	846
Loan Balances [Abstract]
Ending balance individually evaluated for impairment							93	624
Ending balance collectively evaluated for impairment							23,622	22,492
Ending balance							23,715	23,116
Real Estate - Mortgage [Member]
Allowance for loan losses by segment [Roll Forward]
Beginning Balance	[1]			5,267	5,628	5,628
Charges-offs	[1]			(1,473)		(504)
Recoveries	[1]			40		197
Provision for loan losses	[1]			1,573		(54)
Ending balance	[1]	5,407		5,407		5,267
Ending balances individually evaluated for impairment	[1]						238	507
Ending balances collectively evaluated for impairment	[1]						5,169	4,760
Ending balance	[1]	5,407		5,267	5,628	5,267	5,407	5,267
Loan Balances [Abstract]
Ending balance individually evaluated for impairment	[1]						14,245	18,362
Ending balance collectively evaluated for impairment	[1]						439,715	430,046
Ending balance	[1]						453,960	448,408
Consumer [Member]
Allowance for loan losses by segment [Roll Forward]
Beginning Balance				455	279	279
Charges-offs				(228)		(204)
Recoveries				33		28
Provision for loan losses				909		352
Ending balance		1,169		1,169		455
Ending balances individually evaluated for impairment							0	0
Ending balances collectively evaluated for impairment							1,169	455
Ending balance		1,169		455	279	455	1,169	455
Loan Balances [Abstract]
Ending balance individually evaluated for impairment							0	81
Ending balance collectively evaluated for impairment							150,427	58,826
Ending balance							150,427	58,907
Other [Member]
Allowance for loan losses by segment [Roll Forward]
Beginning Balance				184	213	213
Charges-offs				(136)		(147)
Recoveries				38		40
Provision for loan losses				96		78
Ending balance		182		182		184
Ending balances individually evaluated for impairment							0	0
Ending balances collectively evaluated for impairment							182	184
Ending balance		$ 182		$ 184	$ 213	$ 184	182	184
Loan Balances [Abstract]
Ending balance individually evaluated for impairment							0	0
Ending balance collectively evaluated for impairment							12,891	19,017
Ending balance							$ 12,891	$ 19,017

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