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Recent Accounting Pronouncements (Impact of ASC 326 in Balance Sheet as January 1, 2020) (Details) - USD ($) $ in Thousands | Mar. 31, 2020 | Jan. 01, 2020 | Dec. 31, 2019 | Mar. 31, 2019 | Dec. 31, 2018
--- | --- | --- | --- | --- | ---
New Accounting Pronouncements or Change in Accounting Principle [Line Items] |  |  |  |  |
Loans | $ 3,018,416 |  | $ 3,081,973 |  |
Allowance for Credit Losses | (36,641) | $ (31,931) | (16,278) | $ (16,243) | $ (15,823)
Allowance for Credit Losses on Unfunded Loan Commitments |  | (173) |  |  |
Adjusted Balance |  |  |  |  |
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] |  |  |  |  |
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 | 509,947 | 534,692 | 589,758 |  |
Allowance for Credit Losses | (8,814) |  | (4,799) |  |
Commercial and Industrial Loans | Adjusted Balance |  |  |  |  |
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 | 1,489,353 | 1,500,247 | 1,495,862 |  |
Allowance for Credit Losses | (17,310) |  | (4,692) | (5,741) | (5,291)
Commercial Real Estate Loans | Adjusted Balance |  |  |  |  |
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 | 366,286 | 384,654 | 384,526 |  |
Allowance for Credit Losses | (6,485) |  | (5,315) | (5,453) | (5,776)
Agricultural Loans | Adjusted Balance |  |  |  |  |
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 | 55,833 | 57,257 |  |  |
Allowance for Credit Losses | (172) |  | 0 |  |
Leases | Adjusted Balance |  |  |  |  |
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 |  |  | 57,257 |  |
Home Equity Loans |  |  |  |  |
New Accounting Pronouncements or Change in Accounting Principle [Line Items] |  |  |  |  |
Loans | 224,306 | 225,790 | 225,755 |  |
Allowance for Credit Losses | (977) |  | (200) | (214) | (229)
Home Equity Loans | Adjusted Balance |  |  |  |  |
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 | 68,085 | 69,264 | 81,217 |  |
Allowance for Credit Losses | (455) |  | (434) | (483) | (420)
Consumer Loans | Adjusted Balance |  |  |  |  |
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 |  |  | (11,953) |  |
Credit Cards |  |  |  |  |
New Accounting Pronouncements or Change in Accounting Principle [Line Items] |  |  |  |  |
Loans | 11,056 | 11,953 |  |  |
Allowance for Credit Losses | (124) |  | 0 |  |
Credit Cards | Adjusted Balance |  |  |  |  |
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 |  |  | 11,953 |  |
Residential Mortgage Loans |  |  |  |  |
New Accounting Pronouncements or Change in Accounting Principle [Line Items] |  |  |  |  |
Loans | 293,550 | 305,002 | 304,855 |  |
Allowance for Credit Losses | $ (2,304) |  | (333) | $ (429) | $ (472)
Residential Mortgage Loans | Adjusted Balance |  |  |  |  |
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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