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Loans (Aging of Past Due Loans) (Details) - USD ($) $ in Thousands | Jun. 30, 2020 | Jan. 01, 2020 | Dec. 31, 2019
--- | --- | --- | ---
Financing Receivable, Past Due [Line Items] |  |  |  |
Total Past Due | $ 18,106 |  | $ 19,974 | [1]
Loans Not Past Due | 3,252,828 |  | 3,075,928 | [1]
Total | 3,270,934 |  | 3,081,973 |
Commercial and Industrial Loans |  |  |  |
Financing Receivable, Past Due [Line Items] |  |  |  |
Total Past Due | 5,535 |  |  |
Loans Not Past Due | 790,153 |  |  |
Total | 795,688 | $ 534,692 | 589,758 |
Commercial Real Estate Loans |  |  |  |
Financing Receivable, Past Due [Line Items] |  |  |  |
Total Past Due | 1,332 |  | 2,746 |
Loans Not Past Due | 1,471,902 |  | 1,497,118 |
Total | 1,473,234 | 1,500,247 | 1,495,862 |
Agricultural Loans |  |  |  |
Financing Receivable, Past Due [Line Items] |  |  |  |
Total Past Due | 3,610 |  | 828 |
Loans Not Past Due | 369,873 |  | 390,043 |
Total | 373,483 | 384,654 | 384,526 |
Leases |  |  |  |
Financing Receivable, Past Due [Line Items] |  |  |  |
Total Past Due | 0 |  |  |
Loans Not Past Due | 56,728 |  |  |
Total | 56,728 | 57,257 |  |
Home Equity Loans |  |  |  |
Financing Receivable, Past Due [Line Items] |  |  |  |
Total Past Due | 884 |  | 1,454 |
Loans Not Past Due | 215,482 |  | 225,321 |
Total | 216,366 | 225,790 | 225,755 |
Consumer Loans |  |  |  |
Financing Receivable, Past Due [Line Items] |  |  |  |
Total Past Due | 710 |  | 592 |
Loans Not Past Due | 64,262 |  | 80,837 |
Total | 64,972 | 69,264 | 81,217 |
Credit Cards |  |  |  |
Financing Receivable, Past Due [Line Items] |  |  |  |
Total Past Due | 295 |  |  |
Loans Not Past Due | 9,922 |  |  |
Total | 10,217 | 11,953 |  |
Residential Mortgage Loans |  |  |  |
Financing Receivable, Past Due [Line Items] |  |  |  |
Total Past Due | 5,740 |  | 8,783 |
Loans Not Past Due | 274,506 |  | 296,777 |
Total | 280,246 | $ 305,002 | 304,855 |
30-59 Days Past Due |  |  |  |
Financing Receivable, Past Due [Line Items] |  |  |  |
Total Past Due | 5,830 |  | 11,879 | [1]
30-59 Days Past Due | Commercial and Industrial Loans |  |  |  |
Financing Receivable, Past Due [Line Items] |  |  |  |
Total Past Due | 238 |  |  |
30-59 Days Past Due | Commercial Real Estate Loans |  |  |  |
Financing Receivable, Past Due [Line Items] |  |  |  |
Total Past Due | 169 |  | 209 |
30-59 Days Past Due | Agricultural Loans |  |  |  |
Financing Receivable, Past Due [Line Items] |  |  |  |
Total Past Due | 927 |  | 499 |
30-59 Days Past Due | Leases |  |  |  |
Financing Receivable, Past Due [Line Items] |  |  |  |
Total Past Due | 0 |  |  |
30-59 Days Past Due | Home Equity Loans |  |  |  |
Financing Receivable, Past Due [Line Items] |  |  |  |
Total Past Due | 539 |  | 1,121 |
30-59 Days Past Due | Consumer Loans |  |  |  |
Financing Receivable, Past Due [Line Items] |  |  |  |
Total Past Due | 608 |  | 347 |
30-59 Days Past Due | Credit Cards |  |  |  |
Financing Receivable, Past Due [Line Items] |  |  |  |
Total Past Due | 70 |  |  |
30-59 Days Past Due | Residential Mortgage Loans |  |  |  |
Financing Receivable, Past Due [Line Items] |  |  |  |
Total Past Due | 3,279 |  | 5,014 |
60-89 Days Past Due |  |  |  |
Financing Receivable, Past Due [Line Items] |  |  |  |
Total Past Due | 1,905 |  | 2,384 | [1]
60-89 Days Past Due | Commercial and Industrial Loans |  |  |  |
Financing Receivable, Past Due [Line Items] |  |  |  |
Total Past Due | 171 |  |  |
60-89 Days Past Due | Commercial Real Estate Loans |  |  |  |
Financing Receivable, Past Due [Line Items] |  |  |  |
Total Past Due | 37 |  | 431 |
60-89 Days Past Due | Agricultural Loans |  |  |  |
Financing Receivable, Past Due [Line Items] |  |  |  |
Total Past Due | 89 |  | 0 |
60-89 Days Past Due | Leases |  |  |  |
Financing Receivable, Past Due [Line Items] |  |  |  |
Total Past Due | 0 |  |  |
60-89 Days Past Due | Home Equity Loans |  |  |  |
Financing Receivable, Past Due [Line Items] |  |  |  |
Total Past Due | 87 |  | 253 |
60-89 Days Past Due | Consumer Loans |  |  |  |
Financing Receivable, Past Due [Line Items] |  |  |  |
Total Past Due | 11 |  | 156 |
60-89 Days Past Due | Credit Cards |  |  |  |
Financing Receivable, Past Due [Line Items] |  |  |  |
Total Past Due | 34 |  |  |
60-89 Days Past Due | Residential Mortgage Loans |  |  |  |
Financing Receivable, Past Due [Line Items] |  |  |  |
Total Past Due | 1,476 |  | 1,461 |
Greater Than 89 Days Past Due |  |  |  |
Financing Receivable, Past Due [Line Items] |  |  |  |
Total Past Due | 10,371 |  | 5,711 | [1]
Greater Than 89 Days Past Due | Commercial and Industrial Loans |  |  |  |
Financing Receivable, Past Due [Line Items] |  |  |  |
Total Past Due | 5,126 |  |  |
Greater Than 89 Days Past Due | Commercial Real Estate Loans |  |  |  |
Financing Receivable, Past Due [Line Items] |  |  |  |
Total Past Due | 1,126 |  | 2,106 |
Greater Than 89 Days Past Due | Agricultural Loans |  |  |  |
Financing Receivable, Past Due [Line Items] |  |  |  |
Total Past Due | 2,594 |  | 329 |
Greater Than 89 Days Past Due | Leases |  |  |  |
Financing Receivable, Past Due [Line Items] |  |  |  |
Total Past Due | 0 |  |  |
Greater Than 89 Days Past Due | Home Equity Loans |  |  |  |
Financing Receivable, Past Due [Line Items] |  |  |  |
Total Past Due | 258 |  | 80 |
Greater Than 89 Days Past Due | Consumer Loans |  |  |  |
Financing Receivable, Past Due [Line Items] |  |  |  |
Total Past Due | 91 |  | 89 |
Greater Than 89 Days Past Due | Credit Cards |  |  |  |
Financing Receivable, Past Due [Line Items] |  |  |  |
Total Past Due | 191 |  |  |
Greater Than 89 Days Past Due | Residential Mortgage Loans |  |  |  |
Financing Receivable, Past Due [Line Items] |  |  |  |
Total Past Due | $ 985 |  | $ 2,308 |
[1] | Total recorded investment in loans includes $13,929 in accrued interest.

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