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Loans (Classifications of Loans) (Details) - USD ($) $ in Thousands | Dec. 31, 2018 | Dec. 31, 2017 | Dec. 31, 2016 | Dec. 31, 2015
--- | --- | --- | --- | ---
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |
Loans, gross | $ 2,731,741 | $ 2,145,019 |  |
Less: Unearned Income | (3,682) | (3,381) |  |
Allowance for Loan Losses | (15,823) | (15,694) | $ (14,808) | $ (14,438)
Loans, Net | 2,712,236 | 2,125,944 |  |
Commercial and Industrial Loans and Leases |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |
Allowance for Loan Losses | (2,953) | (4,735) | (3,725) | (4,242)
Commercial Real Estate Loans |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |
Allowance for Loan Losses | (5,291) | (4,591) | (5,452) | (6,342)
Agricultural Loans |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |
Allowance for Loan Losses | (5,776) | (4,894) | (4,094) | (2,115)
Home Equity Loans |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |
Allowance for Loan Losses | (229) | (330) | (283) | (383)
Consumer Loans |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |
Allowance for Loan Losses | (420) | (298) | (235) | (230)
Residential Mortgage Loans |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |
Allowance for Loan Losses | (472) | (343) | $ (329) | $ (414)
Commercial | Commercial and Industrial Loans and Leases |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |
Loans, gross | 543,761 | 486,668 |  |
Commercial | Commercial Real Estate Loans |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |
Loans, gross | 1,208,646 | 926,729 |  |
Commercial | Agricultural Loans |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |
Loans, gross | 365,208 | 333,227 |  |
Retail |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |
Loans, gross | 2,731,741 | 2,145,019 |  |
Retail | Home Equity Loans |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |
Loans, gross | 207,987 | 152,187 |  |
Retail | Consumer Loans |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |
Loans, gross | 77,547 | 67,475 |  |
Retail | Residential Mortgage Loans |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |
Loans, gross | $ 328,592 | $ 178,733 |  |

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