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Recent Accounting Pronouncements (Impact of ASC 326 in Balance Sheet as January 1, 2020) (Details) - USD ($) $ in Thousands | Mar. 31, 2021 | Dec. 31, 2020 | Mar. 31, 2020 | Jan. 01, 2020 | Dec. 31, 2019
--- | --- | --- | --- | --- | ---
New Accounting Pronouncements or Change in Accounting Principle [Line Items] |  |  |  |  |
Loans | $ 3,120,981 | $ 3,091,998 |  |  | $ 3,081,973
Allowance for Credit Losses | (45,099) | (46,859) | $ (36,641) | $ (31,931) | (16,278)
Allowance for Credit Losses on Unfunded Loan Commitments |  |  |  | (173) |
December 31, 2019 After Reclassification |  |  |  |  |
New Accounting Pronouncements or Change in Accounting Principle [Line Items] |  |  |  |  |
Loans |  |  |  |  | 3,081,973
Allowance for Credit Losses |  |  |  |  | (16,278)
Allowance for Credit Losses on Unfunded Loan Commitments |  |  |  |  | 0
Impact of ASC 326 Adoption |  |  |  |  |
New Accounting Pronouncements or Change in Accounting Principle [Line Items] |  |  |  |  |
Loans |  |  |  |  | 0
Allowance for Credit Losses |  |  |  | (15,653) |
Allowance for Credit Losses on Unfunded Loan Commitments |  |  |  | (173) |
Commercial and Industrial Loans |  |  |  |  |
New Accounting Pronouncements or Change in Accounting Principle [Line Items] |  |  |  |  |
Loans | 672,300 | 638,773 |  | 534,692 | 589,758
Allowance for Credit Losses | (6,248) | (6,445) | (8,814) |  | (4,799)
Commercial and Industrial Loans | December 31, 2019 After Reclassification |  |  |  |  |
New Accounting Pronouncements or Change in Accounting Principle [Line Items] |  |  |  |  |
Loans |  |  |  |  | 532,501
Commercial and Industrial Loans | Impact of ASC 326 Adoption |  |  |  |  |
New Accounting Pronouncements or Change in Accounting Principle [Line Items] |  |  |  |  |
Loans |  |  |  | 2,191 | (57,257)
Commercial Real Estate Loans |  |  |  |  |
New Accounting Pronouncements or Change in Accounting Principle [Line Items] |  |  |  |  |
Loans | 1,492,617 | 1,467,397 |  | 1,500,247 | 1,495,862
Allowance for Credit Losses | (28,540) | (29,878) | (17,310) |  | (4,692)
Commercial Real Estate Loans | December 31, 2019 After Reclassification |  |  |  |  |
New Accounting Pronouncements or Change in Accounting Principle [Line Items] |  |  |  |  |
Loans |  |  |  |  | 1,495,862
Commercial Real Estate Loans | Impact of ASC 326 Adoption |  |  |  |  |
New Accounting Pronouncements or Change in Accounting Principle [Line Items] |  |  |  |  |
Loans |  |  |  | 4,385 |
Agricultural Loans |  |  |  |  |
New Accounting Pronouncements or Change in Accounting Principle [Line Items] |  |  |  |  |
Loans | 347,231 | 376,186 |  | 384,654 | 384,526
Allowance for Credit Losses | (6,462) | (6,756) | (6,485) |  | (5,315)
Agricultural Loans | December 31, 2019 After Reclassification |  |  |  |  |
New Accounting Pronouncements or Change in Accounting Principle [Line Items] |  |  |  |  |
Loans |  |  |  |  | 384,526
Agricultural Loans | Impact of ASC 326 Adoption |  |  |  |  |
New Accounting Pronouncements or Change in Accounting Principle [Line Items] |  |  |  |  |
Loans |  |  |  | 128 |
Leases |  |  |  |  |
New Accounting Pronouncements or Change in Accounting Principle [Line Items] |  |  |  |  |
Loans | 55,714 | 55,664 |  | 57,257 |
Allowance for Credit Losses | (201) | (200) | (172) |  | 0
Leases | December 31, 2019 After Reclassification |  |  |  |  |
New Accounting Pronouncements or Change in Accounting Principle [Line Items] |  |  |  |  |
Loans |  |  |  |  | 57,257
Leases | Impact of ASC 326 Adoption |  |  |  |  |
New Accounting Pronouncements or Change in Accounting Principle [Line Items] |  |  |  |  |
Loans |  |  |  | 0 | 57,257
Home Equity Loans |  |  |  |  |
New Accounting Pronouncements or Change in Accounting Principle [Line Items] |  |  |  |  |
Loans | 212,306 | 219,348 |  | 225,790 | 225,755
Allowance for Credit Losses | (965) | (996) | (977) |  | (200)
Home Equity Loans | December 31, 2019 After Reclassification |  |  |  |  |
New Accounting Pronouncements or Change in Accounting Principle [Line Items] |  |  |  |  |
Loans |  |  |  |  | 225,755
Home Equity Loans | Impact of ASC 326 Adoption |  |  |  |  |
New Accounting Pronouncements or Change in Accounting Principle [Line Items] |  |  |  |  |
Loans |  |  |  | 35 |
Consumer Loans |  |  |  |  |
New Accounting Pronouncements or Change in Accounting Principle [Line Items] |  |  |  |  |
Loans | 60,570 | 66,717 |  | 69,264 | 81,217
Allowance for Credit Losses | (439) | (490) | (455) |  | (434)
Consumer Loans | December 31, 2019 After Reclassification |  |  |  |  |
New Accounting Pronouncements or Change in Accounting Principle [Line Items] |  |  |  |  |
Loans |  |  |  |  | 69,264
Consumer Loans | Impact of ASC 326 Adoption |  |  |  |  |
New Accounting Pronouncements or Change in Accounting Principle [Line Items] |  |  |  |  |
Loans |  |  |  | 0 | (11,953)
Credit Cards |  |  |  |  |
New Accounting Pronouncements or Change in Accounting Principle [Line Items] |  |  |  |  |
Loans | 12,609 | 11,637 |  | 11,953 |
Allowance for Credit Losses | (162) | (150) | (124) |  | 0
Credit Cards | December 31, 2019 After Reclassification |  |  |  |  |
New Accounting Pronouncements or Change in Accounting Principle [Line Items] |  |  |  |  |
Loans |  |  |  |  | 11,953
Credit Cards | Impact of ASC 326 Adoption |  |  |  |  |
New Accounting Pronouncements or Change in Accounting Principle [Line Items] |  |  |  |  |
Loans |  |  |  | 0 | 11,953
Residential Mortgage Loans |  |  |  |  |
New Accounting Pronouncements or Change in Accounting Principle [Line Items] |  |  |  |  |
Loans | 267,634 | 256,276 |  | 305,002 | 304,855
Allowance for Credit Losses | $ (2,082) | $ (1,944) | $ (2,304) |  | (333)
Residential Mortgage Loans | December 31, 2019 After Reclassification |  |  |  |  |
New Accounting Pronouncements or Change in Accounting Principle [Line Items] |  |  |  |  |
Loans |  |  |  |  | $ 304,855
Residential Mortgage Loans | Impact of ASC 326 Adoption |  |  |  |  |
New Accounting Pronouncements or Change in Accounting Principle [Line Items] |  |  |  |  |
Loans |  |  |  | $ 147 |

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