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Loans and Allowance for Credit Losses - Composition of Loan Portfolio by Loan Class (Details) - USD ($) $ in Thousands | Dec. 31, 2022 | Dec. 31, 2021
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Financing Receivable, Credit Quality Indicator [Line Items] |  |
Loans | $ 12,003,894 | $ 9,241,861
Commercial and industrial loans |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Loans | 3,437,126 | 2,714,565
Agricultural land, production and other loans to farmers |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Loans | 241,793 | 246,442
Construction |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Loans | 835,582 | 523,066
Commercial real estate, non-owner occupied |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Loans | 2,407,475 | 2,135,459
Commercial real estate, owner occupied |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Loans | 1,246,528 | 986,720
Residential |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Loans | 2,096,655 | 1,159,127
Home equity |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Loans | 630,632 | 523,754
Individuals' loans for household and other personal expenditures |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Loans | 175,211 | 146,092
Public finance and other commercial loans |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Loans | $ 932,892 | $ 806,636

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