Loans and Allowance for Loan Losses (Impaired Loans By Class) (Details) - USD ($) $ in Thousands	3 Months Ended	12 Months Ended
	Mar. 31, 2019	Dec. 31, 2018
Unpaid Principal Balance [Abstract]
Total:	$ 9,446	$ 9,453
Recorded Investment [Abstract]
Total:	8,547	8,590
Related Allowance	877	962
Average Recorded Investment [Abstract]
Total:	8,610	8,898
Interest Income Recognized [Abstract]
Total:	71	383
Consumer Installment
Unpaid Principal Balance [Abstract]
Total:	0	0
Recorded Investment [Abstract]
Total:	0	0
Related Allowance	0	0
Average Recorded Investment [Abstract]
Total:	0	0
Interest Income Recognized [Abstract]
Total:	0	0
Commercial
Unpaid Principal Balance [Abstract]
Total:	1,465	1,535
Recorded Investment [Abstract]
Total:	1,237	1,316
Related Allowance	600	650
Average Recorded Investment [Abstract]
Total:	1,268	1,485
Interest Income Recognized [Abstract]
Total:	5	85
Commercial Real Estate
Unpaid Principal Balance [Abstract]
Total:	2,865	2,976
Recorded Investment [Abstract]
Total:	2,814	2,926
Related Allowance	182	193
Average Recorded Investment [Abstract]
Total:	2,821	2,965
Interest Income Recognized [Abstract]
Total:	27	105
Construction and Farmland
Unpaid Principal Balance [Abstract]
Total:	324	332
Recorded Investment [Abstract]
Total:	273	281
Related Allowance	0	0
Average Recorded Investment [Abstract]
Total:	277	297
Interest Income Recognized [Abstract]
Total:	6	27
Residential Real Estate
Unpaid Principal Balance [Abstract]
Total:	4,792	4,610
Recorded Investment [Abstract]
Total:	4,223	4,067
Related Allowance	95	119
Average Recorded Investment [Abstract]
Total:	4,244	4,151
Interest Income Recognized [Abstract]
Total:	33	166
All Other Loans
Unpaid Principal Balance [Abstract]
Total:	0	0
Recorded Investment [Abstract]
Total:	0	0
Related Allowance	0	0
Average Recorded Investment [Abstract]
Total:	0	0
Interest Income Recognized [Abstract]
Total:	0	0
With No Related Allowance [Member]
Unpaid Principal Balance [Abstract]
With no related allowance:	4,665	4,822
Recorded Investment [Abstract]
With no related allowance:	3,841	4,015
Average Recorded Investment [Abstract]
With no related allowance:	3,885	4,177
Interest Income Recognized [Abstract]
With no related allowance:	34	171
With No Related Allowance [Member] | Commercial - Non Real Estate Commercial And Industrial
Unpaid Principal Balance [Abstract]
With no related allowance:	530	564
Recorded Investment [Abstract]
With no related allowance:	327	356
Average Recorded Investment [Abstract]
With no related allowance:	346	422
Interest Income Recognized [Abstract]
With no related allowance:	5	25
With No Related Allowance [Member] | Commercial Real Estate Owner Occupied
Unpaid Principal Balance [Abstract]
With no related allowance:	0	0
Recorded Investment [Abstract]
With no related allowance:	0	0
Average Recorded Investment [Abstract]
With no related allowance:	0	0
Interest Income Recognized [Abstract]
With no related allowance:	0	0
With No Related Allowance [Member] | Commercial Real Estate Non-Owner Occupied
Unpaid Principal Balance [Abstract]
With no related allowance:	452	558
Recorded Investment [Abstract]
With no related allowance:	394	501
Average Recorded Investment [Abstract]
With no related allowance:	398	511
Interest Income Recognized [Abstract]
With no related allowance:	1	4
With No Related Allowance [Member] | Construction And Farmland Commercial
Unpaid Principal Balance [Abstract]
With no related allowance:	324	332
Recorded Investment [Abstract]
With no related allowance:	273	281
Average Recorded Investment [Abstract]
With no related allowance:	277	297
Interest Income Recognized [Abstract]
With no related allowance:	6	27
With No Related Allowance [Member] | Consumer Installment
Unpaid Principal Balance [Abstract]
With no related allowance:	0	0
Recorded Investment [Abstract]
With no related allowance:	0	0
Average Recorded Investment [Abstract]
With no related allowance:	0	0
Interest Income Recognized [Abstract]
With no related allowance:	0	0
With No Related Allowance [Member] | Residential Equity Lines
Unpaid Principal Balance [Abstract]
With no related allowance:	468	468
Recorded Investment [Abstract]
With no related allowance:	86	92
Average Recorded Investment [Abstract]
With no related allowance:	86	93
Interest Income Recognized [Abstract]
With no related allowance:	0	0
With No Related Allowance [Member] | Residential Single Family
Unpaid Principal Balance [Abstract]
With no related allowance:	2,512	2,616
Recorded Investment [Abstract]
With no related allowance:	2,381	2,499
Average Recorded Investment [Abstract]
With no related allowance:	2,396	2,565
Interest Income Recognized [Abstract]
With no related allowance:	17	101
With No Related Allowance [Member] | Residential Multifamily
Unpaid Principal Balance [Abstract]
With no related allowance:	379	284
Recorded Investment [Abstract]
With no related allowance:	380	286
Average Recorded Investment [Abstract]
With no related allowance:	382	289
Interest Income Recognized [Abstract]
With no related allowance:	5	14
With No Related Allowance [Member] | All Other Loans
Unpaid Principal Balance [Abstract]
With no related allowance:	0	0
Recorded Investment [Abstract]
With no related allowance:	0	0
Average Recorded Investment [Abstract]
With no related allowance:	0	0
Interest Income Recognized [Abstract]
With no related allowance:	0	0
With An Allowance Recorded [Member]
Unpaid Principal Balance [Abstract]
With an allowance recorded:	4,781	4,631
Recorded Investment [Abstract]
With an allowance recorded:	4,706	4,575
Related Allowance	877	962
Average Recorded Investment [Abstract]
With an allowance recorded:	4,725	4,721
Interest Income Recognized [Abstract]
With an allowance recorded:	37	212
With An Allowance Recorded [Member] | Commercial - Non Real Estate Commercial And Industrial
Unpaid Principal Balance [Abstract]
With an allowance recorded:	935	971
Recorded Investment [Abstract]
With an allowance recorded:	910	960
Related Allowance	600	650
Average Recorded Investment [Abstract]
With an allowance recorded:	922	1,063
Interest Income Recognized [Abstract]
With an allowance recorded:	0	60
With An Allowance Recorded [Member] | Commercial Real Estate Non-Owner Occupied
Unpaid Principal Balance [Abstract]
With an allowance recorded:	2,413	2,418
Recorded Investment [Abstract]
With an allowance recorded:	2,420	2,425
Related Allowance	182	193
Average Recorded Investment [Abstract]
With an allowance recorded:	2,423	2,454
Interest Income Recognized [Abstract]
With an allowance recorded:	26	101
With An Allowance Recorded [Member] | Construction And Farmland Commercial
Unpaid Principal Balance [Abstract]
With an allowance recorded:	0	0
Recorded Investment [Abstract]
With an allowance recorded:	0	0
Related Allowance	0	0
Average Recorded Investment [Abstract]
With an allowance recorded:	0	0
Interest Income Recognized [Abstract]
With an allowance recorded:	0	0
With An Allowance Recorded [Member] | Consumer Installment
Unpaid Principal Balance [Abstract]
With an allowance recorded:	0	0
Recorded Investment [Abstract]
With an allowance recorded:	0	0
Related Allowance	0	0
Average Recorded Investment [Abstract]
With an allowance recorded:	0	0
Interest Income Recognized [Abstract]
With an allowance recorded:	0	0
With An Allowance Recorded [Member] | Residential Equity Lines
Unpaid Principal Balance [Abstract]
With an allowance recorded:	0	0
Recorded Investment [Abstract]
With an allowance recorded:	0	0
Related Allowance	0	0
Average Recorded Investment [Abstract]
With an allowance recorded:	0	0
Interest Income Recognized [Abstract]
With an allowance recorded:	0	0
With An Allowance Recorded [Member] | Residential Single Family
Unpaid Principal Balance [Abstract]
With an allowance recorded:	1,433	1,242
Recorded Investment [Abstract]
With an allowance recorded:	1,376	1,190
Related Allowance	95	119
Average Recorded Investment [Abstract]
With an allowance recorded:	1,380	1,204
Interest Income Recognized [Abstract]
With an allowance recorded:	11	51
With An Allowance Recorded [Member] | All Other Loans
Unpaid Principal Balance [Abstract]
With an allowance recorded:	0	0
Recorded Investment [Abstract]
With an allowance recorded:	0	0
Related Allowance	0	0
Average Recorded Investment [Abstract]
With an allowance recorded:	0	0
Interest Income Recognized [Abstract]
With an allowance recorded:	$ 0	$ 0