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Loans and Allowance for Credit Losses (Effect on Loan Loss Provision as a Result of Changes in Methodology) (Details) - USD ($) $ in Thousands | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 30, 2020 | Jun. 30, 2019 | Jun. 30, 2020 | Jun. 30, 2019
Financing Receivable, Allowance for Credit Losses [Line Items] |  |  |  |
Provision for credit losses | $ 1,000 | $ 200 | $ 1,350 | $ 300
Residential Portfolio Segment [Member] |  |  |  |
Financing Receivable, Allowance for Credit Losses [Line Items] |  |  |  |
Provision for credit losses | 153 | 19 | 322 | 214
Commercial Real Estate Portfolio Segment [Member] |  |  |  |
Financing Receivable, Allowance for Credit Losses [Line Items] |  |  |  |
Provision for credit losses | 463 | 302 | 666 | 183
Commercial Portfolio Segment [Member] |  |  |  |
Financing Receivable, Allowance for Credit Losses [Line Items] |  |  |  |
Provision for credit losses | 68 | 52 | 421 | 118
Consumer Portfolio Segment [Member] |  |  |  |
Financing Receivable, Allowance for Credit Losses [Line Items] |  |  |  |
Provision for credit losses | (48) | 42 | 28 | 8
Construction Loans [Member] |  |  |  |
Financing Receivable, Allowance for Credit Losses [Line Items] |  |  |  |
Provision for credit losses |  |  | $ (87) | $ (223)
Construction Loans [Member] | Commercial and Residential Real Estate Portfolio Segment [Member] |  |  |  |
Financing Receivable, Allowance for Credit Losses [Line Items] |  |  |  |
Provision for credit losses | $ 364 | $ (215) |  |

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