Allowance for Loan and Lease Losses - Individually Impaired Loans (Details) - USD ($) $ in Thousands	6 Months Ended	12 Months Ended
Jun. 30, 2020	Dec. 31, 2019
Financing Receivable, Impaired [Line Items]
With an Allowance Recorded Unpaid Principal Balance	$ 10,982	$ 9,694
With an Allowance Recorded Recorded Investment	10,752	9,464
With an Allowance Recorded Related Allowance	1,359	827
With an Allowance Recorded Average Recorded Investment	10,972	9,951
With an Allowance Recorded Interest Income Recognized	202	503
With no Related Allowance Recorded Unpaid Principal Balance	4,398	6,121
With no Related Allowance Recorded Recorded Investment	4,249	4,688
With no Related Allowance Recorded Average Recorded Investment	4,394	6,684
With no Related Allowance Recorded Interest Income Recognized	3	24
Individually impaired loans Unpaid Principal Balance	15,380	15,815
Total impaired loans	15,001	14,152
Individually impaired loans Related Allowance		827
Individually impaired loans Average Recorded Investment	15,366	16,635
Individually impaired loans Interest Income Recognized	205	527
Commercial, Residential, and Farm Land Real Estate Portfolio Segment [Member] \| Real Estate Sector [Member]
Financing Receivable, Impaired [Line Items]
With an Allowance Recorded Unpaid Principal Balance	9,316	8,310
With an Allowance Recorded Recorded Investment	9,144	8,138
With an Allowance Recorded Related Allowance	593	493
With an Allowance Recorded Average Recorded Investment	9,310	8,336
With an Allowance Recorded Interest Income Recognized	178	439
With no Related Allowance Recorded Unpaid Principal Balance	4,247	6,010
With no Related Allowance Recorded Recorded Investment	4,128	4,607
With no Related Allowance Recorded Average Recorded Investment	4,187	6,382
With no Related Allowance Recorded Interest Income Recognized	3	9
Commercial, Residential, and Farm Land Real Estate Portfolio Segment [Member] \| Real Estate Sector [Member] \| Other construction/land [Member]
Financing Receivable, Impaired [Line Items]
With an Allowance Recorded Unpaid Principal Balance	690	656
With an Allowance Recorded Recorded Investment	571	537
With an Allowance Recorded Related Allowance	173	157
With an Allowance Recorded Average Recorded Investment	586	563
With an Allowance Recorded Interest Income Recognized	21	32
With no Related Allowance Recorded Unpaid Principal Balance	0
With no Related Allowance Recorded Recorded Investment	0
With no Related Allowance Recorded Average Recorded Investment	0
With no Related Allowance Recorded Interest Income Recognized	1
Commercial, Residential, and Farm Land Real Estate Portfolio Segment [Member] \| Real Estate Sector [Member] \| 1-4 Family - Closed-End [Member]
Financing Receivable, Impaired [Line Items]
With an Allowance Recorded Unpaid Principal Balance	3,379	2,298
With an Allowance Recorded Recorded Investment	3,379	2,298
With an Allowance Recorded Related Allowance	71	58
With an Allowance Recorded Average Recorded Investment	3,406	2,365
With an Allowance Recorded Interest Income Recognized	58	146
With no Related Allowance Recorded Unpaid Principal Balance	826	755
With no Related Allowance Recorded Recorded Investment	826	722
With no Related Allowance Recorded Average Recorded Investment	845	726
With no Related Allowance Recorded Interest Income Recognized	0	0
Commercial, Residential, and Farm Land Real Estate Portfolio Segment [Member] \| Real Estate Sector [Member] \| Equity Lines [Member]
Financing Receivable, Impaired [Line Items]
With an Allowance Recorded Unpaid Principal Balance	3,909	4,173
With an Allowance Recorded Recorded Investment	3,856	4,120
With an Allowance Recorded Related Allowance	317	252
With an Allowance Recorded Average Recorded Investment	3,971	4,185
With an Allowance Recorded Interest Income Recognized	69	200
With no Related Allowance Recorded Unpaid Principal Balance	300	326
With no Related Allowance Recorded Recorded Investment	300	301
With no Related Allowance Recorded Average Recorded Investment	304	310
With no Related Allowance Recorded Interest Income Recognized	2	5
Commercial, Residential, and Farm Land Real Estate Portfolio Segment [Member] \| Real Estate Sector [Member] \| Multi-Family Residential [Member]
Financing Receivable, Impaired [Line Items]
With an Allowance Recorded Unpaid Principal Balance	344	353
With an Allowance Recorded Recorded Investment	344	353
With an Allowance Recorded Related Allowance	18	17
With an Allowance Recorded Average Recorded Investment	347	361
With an Allowance Recorded Interest Income Recognized	12	23
With no Related Allowance Recorded Unpaid Principal Balance		0
With no Related Allowance Recorded Recorded Investment		0
With no Related Allowance Recorded Average Recorded Investment		0
With no Related Allowance Recorded Interest Income Recognized		0
Commercial, Residential, and Farm Land Real Estate Portfolio Segment [Member] \| Real Estate Sector [Member] \| Commercial Real Estate Owner Occupied [Member]
Financing Receivable, Impaired [Line Items]
With an Allowance Recorded Unpaid Principal Balance	757	593
With an Allowance Recorded Recorded Investment	757	593
With an Allowance Recorded Related Allowance	11	6
With an Allowance Recorded Average Recorded Investment	763	606
With an Allowance Recorded Interest Income Recognized	18	38
With no Related Allowance Recorded Unpaid Principal Balance	2,029	1,560
With no Related Allowance Recorded Recorded Investment	1,910	1,440
With no Related Allowance Recorded Average Recorded Investment	1,937	1,477
With no Related Allowance Recorded Interest Income Recognized	0	0
Commercial, Residential, and Farm Land Real Estate Portfolio Segment [Member] \| Real Estate Sector [Member] \| Commercial Real Estate Non Owner Occupied [Member]
Financing Receivable, Impaired [Line Items]
With an Allowance Recorded Unpaid Principal Balance	0	0
With an Allowance Recorded Recorded Investment	0	0
With an Allowance Recorded Related Allowance	0	0
With an Allowance Recorded Average Recorded Investment	0	0
With an Allowance Recorded Interest Income Recognized	0	0
With no Related Allowance Recorded Unpaid Principal Balance	627	3,295
With no Related Allowance Recorded Recorded Investment	627	2,105
With no Related Allowance Recorded Average Recorded Investment	634	3,267
With no Related Allowance Recorded Interest Income Recognized	0	0
Commercial, Residential, and Farm Land Real Estate Portfolio Segment [Member] \| Real Estate Sector [Member] \| Farmland [Member]
Financing Receivable, Impaired [Line Items]
With an Allowance Recorded Unpaid Principal Balance	237	237
With an Allowance Recorded Recorded Investment	237	237
With an Allowance Recorded Related Allowance	3	3
With an Allowance Recorded Average Recorded Investment	237	256
With an Allowance Recorded Interest Income Recognized	0	0
With no Related Allowance Recorded Unpaid Principal Balance	465	22
With no Related Allowance Recorded Recorded Investment	465	22
With no Related Allowance Recorded Average Recorded Investment	467	25
With no Related Allowance Recorded Interest Income Recognized	0	0
Agricultural Portfolio Segment [Member] \| Agricultural Sector [Member]
Financing Receivable, Impaired [Line Items]
With an Allowance Recorded Unpaid Principal Balance	2	5
With an Allowance Recorded Recorded Investment	2	5
With an Allowance Recorded Related Allowance	0	1
With an Allowance Recorded Average Recorded Investment	4	6
With an Allowance Recorded Interest Income Recognized	0	0
With no Related Allowance Recorded Unpaid Principal Balance	0	0
With no Related Allowance Recorded Recorded Investment	0	0
With no Related Allowance Recorded Average Recorded Investment	0	0
With no Related Allowance Recorded Interest Income Recognized	0	0
Commercial Portfolio Segment [Member] \| Commercial and Industrial Sector [Member]
Financing Receivable, Impaired [Line Items]
With an Allowance Recorded Unpaid Principal Balance	1,282	915
With an Allowance Recorded Recorded Investment	1,262	896
With an Allowance Recorded Related Allowance	671	219
With an Allowance Recorded Average Recorded Investment	1,297	1,140
With an Allowance Recorded Interest Income Recognized	9	29
With no Related Allowance Recorded Unpaid Principal Balance	142	102
With no Related Allowance Recorded Recorded Investment	121	81
With no Related Allowance Recorded Average Recorded Investment	206	162
With no Related Allowance Recorded Interest Income Recognized	0	0
Consumer Portfolio Segment [Member]
Financing Receivable, Impaired [Line Items]
With an Allowance Recorded Unpaid Principal Balance	382	464
With an Allowance Recorded Recorded Investment	344	425
With an Allowance Recorded Related Allowance	95	114
With an Allowance Recorded Average Recorded Investment	361	469
With an Allowance Recorded Interest Income Recognized	15	35
With no Related Allowance Recorded Unpaid Principal Balance	9	9
With no Related Allowance Recorded Recorded Investment	0	0
With no Related Allowance Recorded Average Recorded Investment	1	140
With no Related Allowance Recorded Interest Income Recognized	$ 0	$ 15

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Average amount of investment of impaired financing receivables with related allowance for credit losses and without a related allowance for credit losses.

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