Loans and Leases - Schedule of Loans and Leases (Details) - USD ($) $ in Thousands	Jun. 30, 2020	Dec. 31, 2019
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans and leases	$ 5,438,709	$ 4,921,195
Less: unearned income and deferred costs and fees	(14,424)	(3,645)
Total loans and leases, net of unearned income and deferred costs and fees	5,424,285	4,917,550
Commercial and industrial
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans and leases	1,403,763	1,008,061
Commercial and industrial | Agriculture
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans and leases	93,748	105,786
Total loans and leases, net of unearned income and deferred costs and fees	93,748
Commercial and industrial | Commercial and industrial other
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans and leases	844,388	902,275
Total loans and leases, net of unearned income and deferred costs and fees	844,791
Commercial and industrial | PPP loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans and leases	465,627	0
Total loans and leases, net of unearned income and deferred costs and fees	465,627
Commercial real estate
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans and leases	2,538,684	2,443,565
Commercial real estate | Agriculture
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans and leases	193,268	184,898
Total loans and leases, net of unearned income and deferred costs and fees	193,710
Commercial real estate | Commercial and industrial other
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans and leases	2,152,476	2,045,030
Total loans and leases, net of unearned income and deferred costs and fees	2,154,451
Commercial real estate | Construction
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans and leases	192,940	213,637
Total loans and leases, net of unearned income and deferred costs and fees	193,183
Residential real estate
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans and leases	1,406,956	1,377,837
Residential real estate | Home equity
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans and leases	208,323	219,245
Total loans and leases, net of unearned income and deferred costs and fees	209,145
Residential real estate | Mortgages
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans and leases	1,198,633	1,158,592
Total loans and leases, net of unearned income and deferred costs and fees	1,198,837
Consumer and other
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans and leases	73,093	74,410
Consumer and other | Commercial and industrial other
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans and leases	62,345	61,446
Consumer and other | Indirect
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans and leases	10,748	12,964
Total loans and leases, net of unearned income and deferred costs and fees	10,748
Leases
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans and leases	$ 16,213	$ 17,322