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	Sep. 30, 2021	Dec. 31, 2020
Accounts, Notes, Loans and Financing Receivable [Line Items]
Nonaccruing	$ 163,775	$ 191,483
Loans and leases greater than 90 days and accruing	5,614	5,862
Non-PCD Loans | Commercial
Accounts, Notes, Loans and Financing Receivable [Line Items]
Nonaccruing	52,645	43,322
Loans and leases greater than 90 days and accruing	2,015	4,312
Non-PCD Loans | Commercial | Construction and land development
Accounts, Notes, Loans and Financing Receivable [Line Items]
Nonaccruing	1,457	1,661
Loans and leases greater than 90 days and accruing	0	0
Non-PCD Loans | Commercial | Owner occupied commercial mortgage
Accounts, Notes, Loans and Financing Receivable [Line Items]
Nonaccruing	19,886	23,103
Loans and leases greater than 90 days and accruing	601	3,625
Non-PCD Loans | Commercial | Non-owner occupied commercial mortgage
Accounts, Notes, Loans and Financing Receivable [Line Items]
Nonaccruing	10,613	7,932
Loans and leases greater than 90 days and accruing	0	147
Non-PCD Loans | Commercial | Commercial and industrial
Accounts, Notes, Loans and Financing Receivable [Line Items]
Nonaccruing	20,689	10,626
Loans and leases greater than 90 days and accruing	1,414	540
Non-PCD Loans | Consumer
Accounts, Notes, Loans and Financing Receivable [Line Items]
Nonaccruing	66,092	93,222
Loans and leases greater than 90 days and accruing	1,812	1,195
Non-PCD Loans | Consumer | Construction and land development
Accounts, Notes, Loans and Financing Receivable [Line Items]
Nonaccruing	571	652
Loans and leases greater than 90 days and accruing	0	0
Non-PCD Loans | Consumer | Residential mortgage
Accounts, Notes, Loans and Financing Receivable [Line Items]
Nonaccruing	44,463	66,345
Loans and leases greater than 90 days and accruing	779	0
Non-PCD Loans | Consumer | Revolving mortgage
Accounts, Notes, Loans and Financing Receivable [Line Items]
Nonaccruing	17,295	22,236
Loans and leases greater than 90 days and accruing	0	0
Non-PCD Loans | Consumer | Consumer auto
Accounts, Notes, Loans and Financing Receivable [Line Items]
Nonaccruing	3,287	3,166
Loans and leases greater than 90 days and accruing	0	0
Non-PCD Loans | Consumer | Consumer other
Accounts, Notes, Loans and Financing Receivable [Line Items]
Nonaccruing	476	823
Loans and leases greater than 90 days and accruing	1,033	1,195
PCD Loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Nonaccruing	45,038	54,939
Loans and leases greater than 90 days and accruing	$ 1,787	$ 355