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Loans - Loans Individually Evaluated for Impairment Including Loans Modified in Troubled Debt Restructurings by Portfolio Segment (Details) - USD ($) $ in Thousands | Mar. 31, 2020 | Dec. 31, 2019
--- | --- | ---
With an allowance recorded: |  |
Allowance for Loan Losses Allocated | $ 5,154 | $ 2,301
With no related allowance recorded: |  |
Unpaid Principal Balance, Total | 33,579 | 24,431
Recorded Investment, Total | 30,892 | 20,755
Commercial, industrial and agricultural |  |
With an allowance recorded: |  |
Unpaid Principal Balance | 7,111 | 2,657
Recorded Investment | 7,068 | 1,476
Allowance for Loan Losses Allocated | 3,523 | 673
With no related allowance recorded: |  |
Unpaid Principal Balance | 4,780 | 9,845
Recorded Investment | 4,627 | 9,695
Commercial mortgages |  |
With an allowance recorded: |  |
Unpaid Principal Balance | 6,542 | 6,541
Recorded Investment | 4,312 | 4,349
Allowance for Loan Losses Allocated | 1,580 | 1,594
With no related allowance recorded: |  |
Unpaid Principal Balance | 14,666 | 4,903
Recorded Investment | 14,425 | 4,770
Residential Real Estate |  |
With an allowance recorded: |  |
Unpaid Principal Balance | 480 | 485
Recorded Investment | 460 | 465
Allowance for Loan Losses Allocated | 51 | 34
With no related allowance recorded: |  |
Unpaid Principal Balance | 0 | 0
Recorded Investment | $ 0 | $ 0

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