Loan and Lease Receivables - Schedule of Unpaid Principal Balance and Carrying Value for Acquired Non-impaired Loans and Leases (Details) - USD ($) $ in Thousands	Mar. 31, 2020	Dec. 31, 2019	Mar. 31, 2019
Accounts Notes And Loans Receivable [Line Items]
Loans and leases	$ 3,860,259	$ 3,785,661	$ 3,567,566
Acquired Non-impaired Loans and Leases
Accounts Notes And Loans Receivable [Line Items]
Unpaid Principal Balance	649,158	710,161
Loans and leases	632,185	691,341
Commercial Real Estate
Accounts Notes And Loans Receivable [Line Items]
Loans and leases	1,294,959	1,276,542	1,262,283
Commercial Real Estate | Acquired Non-impaired Loans and Leases
Accounts Notes And Loans Receivable [Line Items]
Unpaid Principal Balance	335,844	356,787
Loans and leases	327,820	348,365
Residential Real Estate
Accounts Notes And Loans Receivable [Line Items]
Loans and leases	693,997	711,822	699,036
Residential Real Estate | Acquired Non-impaired Loans and Leases
Accounts Notes And Loans Receivable [Line Items]
Unpaid Principal Balance	120,492	130,412
Loans and leases	118,853	128,527
Construction, Land Development, and Other Land
Accounts Notes And Loans Receivable [Line Items]
Loans and leases	277,776	278,657	213,659
Construction, Land Development, and Other Land | Acquired Non-impaired Loans and Leases
Accounts Notes And Loans Receivable [Line Items]
Unpaid Principal Balance	31,268	38,416
Loans and leases	30,484	37,490
Commercial and Industrial
Accounts Notes And Loans Receivable [Line Items]
Loans and leases	1,414,559	1,331,565	1,189,818
Commercial and Industrial | Acquired Non-impaired Loans and Leases
Accounts Notes And Loans Receivable [Line Items]
Unpaid Principal Balance	139,970	159,599
Loans and leases	135,063	153,660
Installment and Other
Accounts Notes And Loans Receivable [Line Items]
Loans and leases	5,721	6,565	12,802
Installment and Other | Acquired Non-impaired Loans and Leases
Accounts Notes And Loans Receivable [Line Items]
Unpaid Principal Balance	916	971
Loans and leases	891	944
Lease Financing Receivables
Accounts Notes And Loans Receivable [Line Items]
Loans and leases	173,247	180,510	$ 189,968
Lease Financing Receivables | Acquired Non-impaired Loans and Leases
Accounts Notes And Loans Receivable [Line Items]
Unpaid Principal Balance	20,668	23,976
Loans and leases	$ 19,074	$ 22,355