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Loans and Leases and Allowance for Loan and Lease Losses - Impaired Loan Portfolio (Details) - USD ($) $ in Thousands | 3 Months Ended | 9 Months Ended |
--- | --- | --- | ---
Sep. 30, 2021 | Sep. 30, 2020 | Sep. 30, 2021 | Sep. 30, 2020 | Dec. 31, 2020
Financing Receivable, Impaired [Line Items] |  |  |  |  |
Impaired loans with a valuation allowance, Related Allowance | $ 1,013 |  | $ 1,013 |  | $ 546
Total impaired loans, Recorded Investment | 6,037 |  | 6,037 |  | 7,451
Total impaired loans, Unpaid Principal Balance | 6,428 |  | 6,428 |  | 7,674
Impaired loans with a valuation allowance, Average Recorded Investment |  |  | 1,711 | $ 1,179 |
Impaired loans with a valuation allowance, Interest Income Recognized |  |  | 122 | 27 |
Total impaired loans, Average Recorded Investment | 6,118 | $ 4,536 | 6,346 | 4,519 |
Total impaired loans, Interest Income Recognized | 73 | 52 | 256 | 134 |
All Other Loans and leases [Member] |  |  |  |  |
Financing Receivable, Impaired [Line Items] |  |  |  |  |
Impaired loans without a valuation allowance, Recorded Investment | 2,156 |  | 2,156 |  | 4,759
Impaired loans without a valuation allowance, Unpaid Principal Balance | 2,157 |  | 2,157 |  | 4,760
Impaired loans with a valuation allowance, Recorded Investment | 1,218 |  | 1,218 |  | 574
Impaired loans with a valuation allowance, Unpaid Principal Balance | 1,220 |  | 1,220 |  | 574
Impaired loans with a valuation allowance, Related Allowance | 586 |  | 586 |  | 237
Impaired loans without a valuation allowance, Average Recorded Investment | 2,171 | 1,310 | 2,778 | 1,316 |
Impaired loans without a valuation allowance, Interest Income Recognized | 19 | 6 | 40 | 24 |
Impaired loans with a valuation allowance, Average Recorded Investment | 1,273 | 1,017 |  |  |
Impaired loans with a valuation allowance, Interest Income Recognized | 5 | 6 |  |  |
All Other Loans and leases [Member] | Commercial Real Estate [Member] |  |  |  |  |
Financing Receivable, Impaired [Line Items] |  |  |  |  |
Impaired loans without a valuation allowance, Recorded Investment |  |  |  |  | 3,871
Impaired loans without a valuation allowance, Unpaid Principal Balance |  |  |  |  | 3,872
Impaired loans with a valuation allowance, Recorded Investment | 858 |  | 858 |  |
Impaired loans with a valuation allowance, Unpaid Principal Balance | 858 |  | 858 |  |
Impaired loans with a valuation allowance, Related Allowance | 417 |  | 417 |  |
Impaired loans without a valuation allowance, Average Recorded Investment |  | 552 | 1,000 | 374 |
Impaired loans without a valuation allowance, Interest Income Recognized |  | 3 | 1 | 7 |
Impaired loans with a valuation allowance, Average Recorded Investment | 858 | 198 | 1,218 | 198 |
Impaired loans with a valuation allowance, Interest Income Recognized |  |  | 104 | 2 |
All Other Loans and leases [Member] | Consumer Real Estate [Member] |  |  |  |  |
Financing Receivable, Impaired [Line Items] |  |  |  |  |
Impaired loans without a valuation allowance, Recorded Investment | 2,156 |  | 2,156 |  | 888
Impaired loans without a valuation allowance, Unpaid Principal Balance | 2,157 |  | 2,157 |  | 888
Impaired loans with a valuation allowance, Recorded Investment | 261 |  | 261 |  | 428
Impaired loans with a valuation allowance, Unpaid Principal Balance | 263 |  | 263 |  | 428
Impaired loans with a valuation allowance, Related Allowance | 70 |  | 70 |  | 116
Impaired loans without a valuation allowance, Average Recorded Investment | 2,171 | 758 | 1,778 | 653 |
Impaired loans without a valuation allowance, Interest Income Recognized | 19 | 3 | 39 | 17 |
Impaired loans with a valuation allowance, Average Recorded Investment | 261 | 440 | 352 | 712 |
Impaired loans with a valuation allowance, Interest Income Recognized | 3 | 4 | 11 | 18 |
All Other Loans and leases [Member] | Construction and Land Development [Member] |  |  |  |  |
Financing Receivable, Impaired [Line Items] |  |  |  |  |
Impaired loans without a valuation allowance, Average Recorded Investment |  |  |  | 289 |
All Other Loans and leases [Member] | Commercial and Industrial [Member] |  |  |  |  |
Financing Receivable, Impaired [Line Items] |  |  |  |  |
Impaired loans with a valuation allowance, Recorded Investment | 99 |  | 99 |  | 146
Impaired loans with a valuation allowance, Unpaid Principal Balance | 99 |  | 99 |  | 146
Impaired loans with a valuation allowance, Related Allowance | 99 |  | 99 |  | 121
Impaired loans with a valuation allowance, Average Recorded Investment | 154 | 379 | 141 | 269 |
Impaired loans with a valuation allowance, Interest Income Recognized | 2 | 2 | 7 | 7 |
Purchased Credit Impaired Loans [Member] |  |  |  |  |
Financing Receivable, Impaired [Line Items] |  |  |  |  |
Impaired loans with a valuation allowance, Recorded Investment | 2,663 |  | 2,663 |  | 2,118
Impaired loans with a valuation allowance, Unpaid Principal Balance | 3,051 |  | 3,051 |  | 2,340
Impaired loans with a valuation allowance, Related Allowance | 427 |  | 427 |  | 309
Impaired loans with a valuation allowance, Average Recorded Investment | 2,674 | 2,209 | 1,857 | 2,024 |
Impaired loans with a valuation allowance, Interest Income Recognized | 49 | 40 | 94 | 83 |
Purchased Credit Impaired Loans [Member] | Commercial Real Estate [Member] |  |  |  |  |
Financing Receivable, Impaired [Line Items] |  |  |  |  |
Impaired loans with a valuation allowance, Recorded Investment | 1,206 |  | 1,206 |  |
Impaired loans with a valuation allowance, Unpaid Principal Balance | 1,500 |  | 1,500 |  |
Impaired loans with a valuation allowance, Related Allowance | 61 |  | 61 |  |
Impaired loans with a valuation allowance, Average Recorded Investment | 1,230 | 8 | 410 | 250 |
Impaired loans with a valuation allowance, Interest Income Recognized | 27 |  | 27 | 1 |
Purchased Credit Impaired Loans [Member] | Consumer Real Estate [Member] |  |  |  |  |
Financing Receivable, Impaired [Line Items] |  |  |  |  |
Impaired loans with a valuation allowance, Recorded Investment | 1,196 |  | 1,196 |  | 1,827
Impaired loans with a valuation allowance, Unpaid Principal Balance | 1,318 |  | 1,318 |  | 2,086
Impaired loans with a valuation allowance, Related Allowance | 155 |  | 155 |  | 88
Impaired loans with a valuation allowance, Average Recorded Investment | 1,176 | 1,869 | 1,169 | 1,344 |
Impaired loans with a valuation allowance, Interest Income Recognized | 21 | 38 | 64 | 77 |
Purchased Credit Impaired Loans [Member] | Construction and Land Development [Member] |  |  |  |  |
Financing Receivable, Impaired [Line Items] |  |  |  |  |
Impaired loans with a valuation allowance, Average Recorded Investment |  |  |  | 58 |
Purchased Credit Impaired Loans [Member] | Commercial and Industrial [Member] |  |  |  |  |
Financing Receivable, Impaired [Line Items] |  |  |  |  |
Impaired loans with a valuation allowance, Recorded Investment | 255 |  | 255 |  | 270
Impaired loans with a valuation allowance, Unpaid Principal Balance | 228 |  | 228 |  | 234
Impaired loans with a valuation allowance, Related Allowance | 209 |  | 209 |  | 218
Impaired loans with a valuation allowance, Average Recorded Investment | 258 | 305 | 263 | 343 |
Impaired loans with a valuation allowance, Interest Income Recognized | 1 | 2 | 3 | 5 |
Purchased Credit Impaired Loans [Member] | Consumer and Other [Member] |  |  |  |  |
Financing Receivable, Impaired [Line Items] |  |  |  |  |
Impaired loans with a valuation allowance, Recorded Investment | 6 |  | 6 |  | 21
Impaired loans with a valuation allowance, Unpaid Principal Balance | 5 |  | 5 |  | 20
Impaired loans with a valuation allowance, Related Allowance | 2 |  | 2 |  | $ 3
Impaired loans with a valuation allowance, Average Recorded Investment | $ 10 | $ 27 | $ 15 | $ 29 |

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