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	Jun. 30, 2021	Dec. 31, 2020
Accounts, Notes, Loans and Financing Receivable [Line Items]
Nonaccruing	$ 187,464	$ 191,483
Loans and leases greater than 90 days and accruing	3,776	5,862
Non-PCI Loans | Commercial
Accounts, Notes, Loans and Financing Receivable [Line Items]
Nonaccruing	57,500	43,322
Loans and leases greater than 90 days and accruing	2,508	4,312
Non-PCI Loans | Commercial | Construction and land development
Accounts, Notes, Loans and Financing Receivable [Line Items]
Nonaccruing	1,574	1,661
Loans and leases greater than 90 days and accruing	816	0
Non-PCI Loans | Commercial | Owner occupied commercial mortgage
Accounts, Notes, Loans and Financing Receivable [Line Items]
Nonaccruing	24,695	23,103
Loans and leases greater than 90 days and accruing	1,226	3,625
Non-PCI Loans | Commercial | Non-owner occupied commercial mortgage
Accounts, Notes, Loans and Financing Receivable [Line Items]
Nonaccruing	7,149	7,932
Loans and leases greater than 90 days and accruing	0	147
Non-PCI Loans | Commercial | Commercial and industrial
Accounts, Notes, Loans and Financing Receivable [Line Items]
Nonaccruing	24,082	10,626
Loans and leases greater than 90 days and accruing	466	540
Non-PCI Loans | Consumer
Accounts, Notes, Loans and Financing Receivable [Line Items]
Nonaccruing	79,030	93,222
Loans and leases greater than 90 days and accruing	905	1,195
Non-PCI Loans | Consumer | Construction and land development
Accounts, Notes, Loans and Financing Receivable [Line Items]
Nonaccruing	763	652
Loans and leases greater than 90 days and accruing	0	0
Non-PCI Loans | Consumer | Residential mortgage
Accounts, Notes, Loans and Financing Receivable [Line Items]
Nonaccruing	53,443	66,345
Loans and leases greater than 90 days and accruing	0	0
Non-PCI Loans | Consumer | Revolving mortgage
Accounts, Notes, Loans and Financing Receivable [Line Items]
Nonaccruing	21,143	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	3,192	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	489	823
Loans and leases greater than 90 days and accruing	905	1,195
PCD Loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Nonaccruing	50,934	54,939
Loans and leases greater than 90 days and accruing	$ 363	$ 355