Loans and Leases - Schedule of Loans and Leases (Details) - USD ($) $ in Thousands	Sep. 30, 2021	Dec. 31, 2020
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans and leases	$ 5,106,484	$ 5,267,910
Less: unearned income and deferred costs and fees	(9,706)	(7,583)
Total loans and leases, net of unearned income and deferred costs and fees	5,096,778	5,260,327
Commercial and industrial
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans and leases	948,209	1,178,728
Commercial and industrial | Agriculture
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans and leases	78,335	94,489
Total loans and leases, net of unearned income and deferred costs and fees	78,335	94,489
Commercial and industrial | Commercial real estate other
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans and leases	727,944	792,987
Total loans and leases, net of unearned income and deferred costs and fees	727,944	792,987
Commercial and industrial | PPP loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans and leases	141,930	291,252
Total loans and leases, net of unearned income and deferred costs and fees	141,930	291,252
Commercial real estate
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans and leases	2,616,019	2,569,192
Commercial real estate | Agriculture
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans and leases	192,183	201,866
Total loans and leases, net of unearned income and deferred costs and fees	192,183	201,866
Commercial real estate | Commercial real estate other
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans and leases	2,253,190	2,204,310
Total loans and leases, net of unearned income and deferred costs and fees	2,253,190	2,204,310
Commercial real estate | Construction
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans and leases	170,646	163,016
Total loans and leases, net of unearned income and deferred costs and fees	170,646	163,016
Residential real estate
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans and leases	1,455,630	1,435,987
Residential real estate | Home equity
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans and leases	185,625	200,827
Total loans and leases, net of unearned income and deferred costs and fees	185,625	200,827
Residential real estate | Mortgages
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans and leases	1,270,005	1,235,160
Total loans and leases, net of unearned income and deferred costs and fees	1,270,005	1,235,160
Consumer and other
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans and leases	72,289	69,800
Consumer and other | Commercial real estate other
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans and leases	66,694	61,399
Consumer and other | Indirect
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans and leases	5,595	8,401
Total loans and leases, net of unearned income and deferred costs and fees	5,595	8,401
Leases
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans and leases	$ 14,337	$ 14,203