Loans and Allowance for Credit Losses - Summary of Non-Accrual Loans by Loan Class (Details) - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non-Accrual Loans	$ 43,062	$ 61,471
Non-Accrual Loans with no Allowance for Credit Losses	9,080
Commercial and industrial loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non-Accrual Loans	7,598	2,329
Non-Accrual Loans with no Allowance for Credit Losses	263
Agricultural land, production and other loans to farmers
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non-Accrual Loans	631	1,012
Non-Accrual Loans with no Allowance for Credit Losses	524
Construction
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non-Accrual Loans	685	123
Non-Accrual Loans with no Allowance for Credit Losses	0
Commercial real estate, non-owner occupied
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non-Accrual Loans	23,029	46,316
Non-Accrual Loans with no Allowance for Credit Losses	6,133
Commercial real estate, owner occupied
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non-Accrual Loans	411	3,040
Non-Accrual Loans with no Allowance for Credit Losses	0
Residential
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non-Accrual Loans	9,153	6,517
Non-Accrual Loans with no Allowance for Credit Losses	2,160
Home equity
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non-Accrual Loans	1,552	2,095
Non-Accrual Loans with no Allowance for Credit Losses	0
Individuals' loans for household and other personal expenditures
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non-Accrual Loans	3	$ 39
Non-Accrual Loans with no Allowance for Credit Losses	$ 0