Loans and Allowance (Impaired Loans) (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended		12 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018	Dec. 31, 2018
Impaired Financing Receivable With Related Allowance [Abstract]
Specific Allowance	$ 40	$ 100	$ 40	$ 100	$ 100
Impaired Financing Receivables Total [Abstract]
Recorded balance, total	7,215	2,773	7,215	2,773	8,315
Unpaid principal balance, total	7,215	2,773	7,215	2,773	8,408
Average investment in impaired loans, total	7,612	3,009	7,847	3,208	4,148
Interest income recognized, total	78	9	253	17	32
Commercial Real Estate [Member]
Impaired Financing Receivable With No Related Allowance [Abstract]
Recorded balance	5,610	705	5,610	705	6,324
Unpaid principal balance	5,610	705	5,610	705	6,377
Average investment in impaired loans	5,871	753	6,080	794	1,882
Interest income recognized	73		242
Impaired Financing Receivable With Related Allowance [Abstract]
Recorded balance		214		214	174
Unpaid principal balance		214		214	214
Specific Allowance		100		100	100
Average investment in impaired loans		214		214	206
Impaired Financing Receivables Total [Abstract]
Recorded balance, total	5,610	919	5,610	919	6,498
Unpaid principal balance, total	5,610	919	5,610	919	6,591
Average investment in impaired loans, total	5,871	967	6,080	1,008	2,088
Interest income recognized, total	73		242
Commercial Segment [Member] | Construction Loans [Member]
Impaired Financing Receivable With No Related Allowance [Abstract]
Recorded balance	376	639	376	639	549
Unpaid principal balance	376	639	376	639	549
Average investment in impaired loans	458	653	489	669	633
Interest income recognized	4	7	9	14	27
Impaired Financing Receivables Total [Abstract]
Recorded balance, total	376	639	376	639	549
Unpaid principal balance, total	376	639	376	639	549
Average investment in impaired loans, total	458	653	489	669	633
Interest income recognized, total	4	7	9	14	27
Commercial Segment [Member] | Commercial and Industrial [Member]
Impaired Financing Receivable With No Related Allowance [Abstract]
Recorded balance	50	144	50	144	131
Unpaid principal balance	50	144	50	144	131
Average investment in impaired loans	104	148	113	190	167
Interest income recognized	1	2	2	2	5
Impaired Financing Receivables Total [Abstract]
Recorded balance, total	50	144	50	144	131
Unpaid principal balance, total	50	144	50	144	131
Average investment in impaired loans, total	104	148	113	190	167
Interest income recognized, total	1	2	2	2	5
Consumer [Member] | First Mortgage [Member]
Impaired Financing Receivable With No Related Allowance [Abstract]
Recorded balance	844	1,071	844	1,071	1,137
Unpaid principal balance	844	1,071	844	1,071	1,137
Average investment in impaired loans	844	1,241	942	1,341	1,260
Interest income recognized				1
Impaired Financing Receivable With Related Allowance [Abstract]
Recorded balance	335		335
Unpaid principal balance	335		335
Specific Allowance	40		40
Average investment in impaired loans	335		223
Impaired Financing Receivables Total [Abstract]
Recorded balance, total	1,179	1,071	1,179	1,071	1,137
Unpaid principal balance, total	1,179	1,071	1,179	1,071	1,137
Average investment in impaired loans, total	$ 1,179	$ 1,241	$ 1,165	1,341	$ 1,260
Interest income recognized, total				$ 1