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Loans (Aging of Past Due Loans) (Details) - USD ($) $ in Thousands | Sep. 30, 2020 | Jan. 01, 2020 | Dec. 31, 2019
--- | --- | --- | ---
Financing Receivable, Past Due [Line Items] |  |  |  |
Total Past Due | $ 15,329 |  | $ 19,974 | [1]
Loans Not Past Due | 3,209,903 |  | 3,075,928 | [1]
Total | 3,225,232 |  | 3,081,973 |
30-59 Days Past Due |  |  |  |
Financing Receivable, Past Due [Line Items] |  |  |  |
Total Past Due | 5,760 |  | 11,879 | [1]
60-89 Days Past Due |  |  |  |
Financing Receivable, Past Due [Line Items] |  |  |  |
Total Past Due | 2,888 |  | 2,384 | [1]
Greater Than 89 Days Past Due |  |  |  |
Financing Receivable, Past Due [Line Items] |  |  |  |
Total Past Due | 6,681 |  | 5,711 | [1]
Commercial and Industrial Loans |  |  |  |
Financing Receivable, Past Due [Line Items] |  |  |  |
Total Past Due | 4,683 |  |  |
Loans Not Past Due | 776,864 |  |  |
Total | 781,547 | $ 534,692 | 589,758 |
Commercial and Industrial Loans | 30-59 Days Past Due |  |  |  |
Financing Receivable, Past Due [Line Items] |  |  |  |
Total Past Due | 35 |  |  |
Commercial and Industrial Loans | 60-89 Days Past Due |  |  |  |
Financing Receivable, Past Due [Line Items] |  |  |  |
Total Past Due | 160 |  |  |
Commercial and Industrial Loans | Greater Than 89 Days Past Due |  |  |  |
Financing Receivable, Past Due [Line Items] |  |  |  |
Total Past Due | 4,488 |  |  |
Commercial Real Estate Loans |  |  |  |
Financing Receivable, Past Due [Line Items] |  |  |  |
Total Past Due | 2,595 |  | 2,746 |
Loans Not Past Due | 1,450,685 |  | 1,497,118 |
Total | 1,453,280 | 1,500,247 | 1,495,862 |
Commercial Real Estate Loans | 30-59 Days Past Due |  |  |  |
Financing Receivable, Past Due [Line Items] |  |  |  |
Total Past Due | 1,637 |  | 209 |
Commercial Real Estate Loans | 60-89 Days Past Due |  |  |  |
Financing Receivable, Past Due [Line Items] |  |  |  |
Total Past Due | 0 |  | 431 |
Commercial Real Estate Loans | Greater Than 89 Days Past Due |  |  |  |
Financing Receivable, Past Due [Line Items] |  |  |  |
Total Past Due | 958 |  | 2,106 |
Agricultural Loans |  |  |  |
Financing Receivable, Past Due [Line Items] |  |  |  |
Total Past Due | 651 |  | 828 |
Loans Not Past Due | 375,564 |  | 390,043 |
Total | 376,215 | 384,654 | 384,526 |
Agricultural Loans | 30-59 Days Past Due |  |  |  |
Financing Receivable, Past Due [Line Items] |  |  |  |
Total Past Due | 0 |  | 499 |
Agricultural Loans | 60-89 Days Past Due |  |  |  |
Financing Receivable, Past Due [Line Items] |  |  |  |
Total Past Due | 578 |  | 0 |
Agricultural Loans | Greater Than 89 Days Past Due |  |  |  |
Financing Receivable, Past Due [Line Items] |  |  |  |
Total Past Due | 73 |  | 329 |
Leases |  |  |  |
Financing Receivable, Past Due [Line Items] |  |  |  |
Total Past Due | 0 |  |  |
Loans Not Past Due | 57,475 |  |  |
Total | 57,475 | 57,257 |  |
Leases | 30-59 Days Past Due |  |  |  |
Financing Receivable, Past Due [Line Items] |  |  |  |
Total Past Due | 0 |  |  |
Leases | 60-89 Days Past Due |  |  |  |
Financing Receivable, Past Due [Line Items] |  |  |  |
Total Past Due | 0 |  |  |
Leases | Greater Than 89 Days Past Due |  |  |  |
Financing Receivable, Past Due [Line Items] |  |  |  |
Total Past Due | 0 |  |  |
Home Equity Loans |  |  |  |
Financing Receivable, Past Due [Line Items] |  |  |  |
Total Past Due | 714 |  | 1,454 |
Loans Not Past Due | 217,926 |  | 225,321 |
Total | 218,640 | 225,790 | 225,755 |
Home Equity Loans | 30-59 Days Past Due |  |  |  |
Financing Receivable, Past Due [Line Items] |  |  |  |
Total Past Due | 401 |  | 1,121 |
Home Equity Loans | 60-89 Days Past Due |  |  |  |
Financing Receivable, Past Due [Line Items] |  |  |  |
Total Past Due | 113 |  | 253 |
Home Equity Loans | Greater Than 89 Days Past Due |  |  |  |
Financing Receivable, Past Due [Line Items] |  |  |  |
Total Past Due | 200 |  | 80 |
Consumer Loans |  |  |  |
Financing Receivable, Past Due [Line Items] |  |  |  |
Total Past Due | 404 |  | 592 |
Loans Not Past Due | 64,515 |  | 80,837 |
Total | 64,919 | 69,264 | 81,217 |
Consumer Loans | 30-59 Days Past Due |  |  |  |
Financing Receivable, Past Due [Line Items] |  |  |  |
Total Past Due | 259 |  | 347 |
Consumer Loans | 60-89 Days Past Due |  |  |  |
Financing Receivable, Past Due [Line Items] |  |  |  |
Total Past Due | 61 |  | 156 |
Consumer Loans | Greater Than 89 Days Past Due |  |  |  |
Financing Receivable, Past Due [Line Items] |  |  |  |
Total Past Due | 84 |  | 89 |
Credit Cards |  |  |  |
Financing Receivable, Past Due [Line Items] |  |  |  |
Total Past Due | 242 |  |  |
Loans Not Past Due | 10,475 |  |  |
Total | 10,717 | 11,953 |  |
Credit Cards | 30-59 Days Past Due |  |  |  |
Financing Receivable, Past Due [Line Items] |  |  |  |
Total Past Due | 147 |  |  |
Credit Cards | 60-89 Days Past Due |  |  |  |
Financing Receivable, Past Due [Line Items] |  |  |  |
Total Past Due | 29 |  |  |
Credit Cards | Greater Than 89 Days Past Due |  |  |  |
Financing Receivable, Past Due [Line Items] |  |  |  |
Total Past Due | 66 |  |  |
Residential Mortgage Loans |  |  |  |
Financing Receivable, Past Due [Line Items] |  |  |  |
Total Past Due | 6,040 |  | 8,783 |
Loans Not Past Due | 256,399 |  | 296,777 |
Total | 262,439 | $ 305,002 | 304,855 |
Residential Mortgage Loans | 30-59 Days Past Due |  |  |  |
Financing Receivable, Past Due [Line Items] |  |  |  |
Total Past Due | 3,281 |  | 5,014 |
Residential Mortgage Loans | 60-89 Days Past Due |  |  |  |
Financing Receivable, Past Due [Line Items] |  |  |  |
Total Past Due | 1,947 |  | 1,461 |
Residential Mortgage Loans | Greater Than 89 Days Past Due |  |  |  |
Financing Receivable, Past Due [Line Items] |  |  |  |
Total Past Due | $ 812 |  | $ 2,308 |
[1] | Total recorded investment in loans includes $13,929 in accrued interest.

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