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Loans and Allowance for Credit Losses (Aging of Past Due Financing Receivables) (Details) - USD ($) $ in Thousands | Dec. 31, 2020 | Dec. 31, 2019
--- | --- | ---
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Current | $ 1,445,761 | $ 1,231,076
Total past due | 3,040 | 6,988
Nonaccrual | 5,455 | 10,590
Total loans | $ 1,454,256 | $ 1,248,654
Percent of total loans, Current | 99.30% | 98.60%
Percent of total loans, Total past due | 0.30% | 0.60%
Percent of total loans, Nonaccrual | 0.40% | 0.80%
Percent of total loans, Total loans | 100.00% | 100.00%
Financing Receivables, 30 to 59 Days Past Due [Member] |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Total past due | $ 1,229 | $ 4,662
Percent of total loans, Total past due | 0.10% | 0.40%
Financing Receivables, 60 to 89 Days Past Due [Member] |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Total past due | $ 1,007 | $ 1,000
Percent of total loans, Total past due | 0.10% | 0.10%
Financing Receivables, Equal to Greater than 90 Days Past Due [Member] |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Total past due | $ 804 | $ 1,326
Percent of total loans, Total past due | 0.10% | 0.10%
Residential Portfolio Segment [Member] |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Current | $ 440,210 | $ 435,671
Total past due | 1,747 | 4,360
Nonaccrual | 1,585 | 2,475
Total loans | 443,542 | 442,506
Residential Portfolio Segment [Member] | Financing Receivables, 30 to 59 Days Past Due [Member] |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Total past due | 517 | 3,021
Residential Portfolio Segment [Member] | Financing Receivables, 60 to 89 Days Past Due [Member] |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Total past due | 938 | 783
Residential Portfolio Segment [Member] | Financing Receivables, Equal to Greater than 90 Days Past Due [Member] |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Total past due | 292 | 556
Commercial Real Estate Portfolio Segment [Member] |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Current | 657,066 | 577,015
Total past due | 879 | 1,730
Nonaccrual | 3,287 | 7,817
Total loans | 661,232 | 586,562
Commercial Real Estate Portfolio Segment [Member] | Financing Receivables, 30 to 59 Days Past Due [Member] |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Total past due | 367 | 743
Commercial Real Estate Portfolio Segment [Member] | Financing Receivables, 60 to 89 Days Past Due [Member] |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Total past due |  | 217
Commercial Real Estate Portfolio Segment [Member] | Financing Receivables, Equal to Greater than 90 Days Past Due [Member] |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Total past due | 512 | 770
Commercial Portfolio Segment [Member] |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Current | 210,704 | 101,476
Total past due | 294 | 246
Nonaccrual | 258 | 298
Total loans | 211,256 | 102,020
Commercial Portfolio Segment [Member] | Financing Receivables, 30 to 59 Days Past Due [Member] |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Total past due | 226 | 246
Commercial Portfolio Segment [Member] | Financing Receivables, 60 to 89 Days Past Due [Member] |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Total past due | 68 |
Consumer Portfolio Segment [Member] |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Current | 31,318 | 17,680
Total past due | 120 | 57
Nonaccrual | 28 |
Total loans | 31,466 | 17,737
Consumer Portfolio Segment [Member] | Financing Receivables, 30 to 59 Days Past Due [Member] |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Total past due | 119 | 57
Consumer Portfolio Segment [Member] | Financing Receivables, 60 to 89 Days Past Due [Member] |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Total past due | 1 |
Construction Loans [Member] | Commercial and Residential Real Estate Portfolio Segment [Member] |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Current | 106,463 | 99,234
Total past due |  | 595
Nonaccrual | 297 |
Total loans | $ 106,760 | 99,829
Construction Loans [Member] | Commercial and Residential Real Estate Portfolio Segment [Member] | Financing Receivables, 30 to 59 Days Past Due [Member] |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Total past due |  | $ 595

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