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Loans - Loans Individually Evaluated for Impairment Including Loans Modified in Troubled Debt Restructurings by Portfolio Segment (Details) - USD ($) $ in Thousands | Jun. 30, 2020 | Dec. 31, 2019
--- | --- | ---
With an allowance recorded: |  |
Allowance for Loan Losses Allocated | $ 3,050 | $ 2,301
With no related allowance recorded: |  |
Unpaid Principal Balance, Total | 34,616 | 24,431
Recorded Investment, Total | 28,907 | 20,755
Commercial, industrial and agricultural |  |
With an allowance recorded: |  |
Unpaid Principal Balance | 2,111 | 2,657
Recorded Investment | 2,051 | 1,476
Allowance for Loan Losses Allocated | 1,149 | 673
With no related allowance recorded: |  |
Unpaid Principal Balance | 10,037 | 9,845
Recorded Investment | 7,267 | 9,695
Commercial mortgages |  |
With an allowance recorded: |  |
Unpaid Principal Balance | 6,563 | 6,541
Recorded Investment | 4,330 | 4,349
Allowance for Loan Losses Allocated | 1,848 | 1,594
With no related allowance recorded: |  |
Unpaid Principal Balance | 15,310 | 4,903
Recorded Investment | 14,684 | 4,770
Residential Real Estate |  |
With an allowance recorded: |  |
Unpaid Principal Balance | 480 | 485
Recorded Investment | 461 | 465
Allowance for Loan Losses Allocated | 53 | 34
With no related allowance recorded: |  |
Unpaid Principal Balance | 115 | 0
Recorded Investment | $ 114 | $ 0

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