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Loans (Details) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2021 | Dec. 31, 2020 | Dec. 31, 2019
Summary of Loans [Abstract] |  |  |
Loans | $ 7,498,459 | $ 7,498,885 |
Deferred loan origination (fees) costs, net | (23,700) | 9,400 |
Residential loans held for sale | 800 | 1,100 |
Loans serviced for unrelated third parties | 575,900 | 614,500 |
Mortgage servicing rights | 1,000 | 1,300 |
Amortization of mortgage servicing rights | 200 | 300 | $ 400
Loans and Leases Receivable, Related Parties [Roll Forward] |  |  |
Balance at January 1 | 5,936 | 2,166 |
New loans | 182 | 1,524 |
Adjustment due to change in composition of related parties | (683) | 2,448 |
Repayments | (2,143) | (202) |
Balance at December 31 | 3,292 | 5,936 | $ 2,166
Commercial [Member] |  |  |
Summary of Loans [Abstract] |  |  |
Loans | 1,489,414 | 1,451,560 |
Commercial Real Estate [Member] |  |  |
Summary of Loans [Abstract] |  |  |
Loans | 2,321,193 | 2,196,477 |
Paycheck Protection Program [Member] |  |  |
Summary of Loans [Abstract] |  |  |
Loans | 101,222 | 430,810 |
Residential Real Estate [Member] |  |  |
Summary of Loans [Abstract] |  |  |
Loans | 1,571,232 | 1,466,662 |
Indirect Auto [Member] |  |  |
Summary of Loans [Abstract] |  |  |
Loans | 859,454 | 931,286 |
Specialty Lending [Member] |  |  |
Summary of Loans [Abstract] |  |  |
Loans | 778,291 | 579,644 |
Home Equity [Member] |  |  |
Summary of Loans [Abstract] |  |  |
Loans | 330,357 | 387,974 |
Other Consumer [Member] |  |  |
Summary of Loans [Abstract] |  |  |
Loans | 47,296 | 54,472 |
Agricultural and Agricultural Real Estate Mortgages [Member] |  |  |
Summary of Loans [Abstract] |  |  |
Loans serviced for unrelated third parties | 25,600 | 25,700 |
Springstone Consumer Loans [Member] |  |  |
Summary of Loans [Abstract] |  |  |
Loans serviced for unrelated third parties | $ 11,400 | $ 11,800 |

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- Definition Reflects the sum for the period of the additions and reductions to related party loans for the change in status of related party classification for individuals with loans. + References No definition available. + Details
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- Definition The periodic amortization (in proportion to and over the period of estimated net servicing income or loss) of capitalized servicing rights, which contractually entitle the servicer to receive fees and ancillary revenues for performing billing, collection, disbursement and recordkeeping services in connection with a mortgage portfolio. As a noncash expense, this element is added back to net income when calculating cash provided by or used in operations using the indirect method. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=123570139&loc=d3e3602-108585 Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 860 -SubTopic 50 -Section 50 -Paragraph 4 -Subparagraph (a)(4) -URI http://asc.fasb.org/extlink&oid=125521744&loc=d3e122739-111746 + Details
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- Definition For an unclassified balance sheet, reflects the carrying amount of unpaid loan amounts due from related parties at the balance sheet date. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 850 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (d) -URI http://asc.fasb.org/extlink&oid=6457730&loc=d3e39549-107864 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-03.7(e)) -URI http://asc.fasb.org/extlink&oid=120398452&loc=d3e534808-122878 + Details
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- Definition Amount, after valuation allowance, of financing receivable held for sale and not part of disposal group. Excludes loan covered under loss sharing agreement and loan classified as investment in debt security. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 45 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=124259787&loc=d3e4428-111522 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 948 -SubTopic 310 -Section 45 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=124265262&loc=d3e48678-111004 + Details
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