Loans and Leases (Recorded Investment, By Class, In Loans And Leases On Nonaccrual Status And Loans And Leases Greater Than 90 Days Past Due And Still Accruing) (Details) - USD ($) $ in Thousands	Mar. 31, 2021	Dec. 31, 2020
Accounts, Notes, Loans and Financing Receivable [Line Items]
Nonaccruing	$ 194,534	$ 191,483
Loans and leases greater than 90 days and accruing	7,377	5,862
Non-PCI Loans | Commercial
Accounts, Notes, Loans and Financing Receivable [Line Items]
Nonaccruing	51,101	43,322
Loans and leases greater than 90 days and accruing	4,218	4,312
Non-PCI Loans | Commercial | Construction and land development
Accounts, Notes, Loans and Financing Receivable [Line Items]
Nonaccruing	1,648	1,661
Loans and leases greater than 90 days and accruing	0	0
Non-PCI Loans | Commercial | Owner occupied commercial mortgage
Accounts, Notes, Loans and Financing Receivable [Line Items]
Nonaccruing	22,796	23,103
Loans and leases greater than 90 days and accruing	1,400	3,625
Non-PCI Loans | Commercial | Non-owner occupied commercial mortgage
Accounts, Notes, Loans and Financing Receivable [Line Items]
Nonaccruing	10,939	7,932
Loans and leases greater than 90 days and accruing	2,211	147
Non-PCI Loans | Commercial | Commercial and industrial
Accounts, Notes, Loans and Financing Receivable [Line Items]
Nonaccruing	15,718	10,626
Loans and leases greater than 90 days and accruing	607	540
Non-PCI Loans | Consumer
Accounts, Notes, Loans and Financing Receivable [Line Items]
Nonaccruing	90,268	93,222
Loans and leases greater than 90 days and accruing	1,727	1,195
Non-PCI Loans | Consumer | Construction and land development
Accounts, Notes, Loans and Financing Receivable [Line Items]
Nonaccruing	566	652
Loans and leases greater than 90 days and accruing	543	0
Non-PCI Loans | Consumer | Residential mortgage
Accounts, Notes, Loans and Financing Receivable [Line Items]
Nonaccruing	61,907	66,345
Loans and leases greater than 90 days and accruing	29	0
Non-PCI Loans | Consumer | Revolving mortgage
Accounts, Notes, Loans and Financing Receivable [Line Items]
Nonaccruing	23,952	22,236
Loans and leases greater than 90 days and accruing	0	0
Non-PCI Loans | Consumer | Consumer auto
Accounts, Notes, Loans and Financing Receivable [Line Items]
Nonaccruing	3,027	3,166
Loans and leases greater than 90 days and accruing	0	0
Non-PCI Loans | Consumer | Consumer other
Accounts, Notes, Loans and Financing Receivable [Line Items]
Nonaccruing	816	823
Loans and leases greater than 90 days and accruing	1,155	1,195
PCD Loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Nonaccruing	53,165	54,939
Loans and leases greater than 90 days and accruing	$ 1,432	$ 355