Loans and Allowance for Loan Losses (Troubled Debt Restructurings) (Details)	3 Months Ended		6 Months Ended
	Jun. 30, 2023 USD ($)	Jun. 30, 2022 USD ($) contract	Jun. 30, 2023 USD ($)	Jun. 30, 2022 USD ($) contract
Financing Receivable, Troubled Debt Restructuring [Line Items]
Number of Contracts | contract		58		137
Amortized cost of loans, modified	$ 29,016,000	$ 37,282,000	$ 88,690,000	$ 78,925,000
Net charge-offs		$ 0		$ 0
Total commercial and industrial
Financing Receivable, Troubled Debt Restructuring [Line Items]
Number of Contracts | contract		30		76
Amortized cost of loans, modified	24,412,000	$ 31,230,000	82,185,000	$ 59,632,000
Total commercial and industrial | Commercial, financial and agricultural
Financing Receivable, Troubled Debt Restructuring [Line Items]
Number of Contracts | contract		23		56
Amortized cost of loans, modified	24,024,000	$ 8,800,000	39,098,000	$ 27,241,000
Total commercial and industrial | Owner-occupied
Financing Receivable, Troubled Debt Restructuring [Line Items]
Number of Contracts | contract		7		20
Amortized cost of loans, modified	388,000	$ 22,430,000	43,087,000	$ 32,391,000
Total commercial real estate
Financing Receivable, Troubled Debt Restructuring [Line Items]
Number of Contracts | contract		7		20
Amortized cost of loans, modified	2,722,000	$ 3,111,000	4,048,000	$ 14,254,000
Total commercial real estate | Investment properties
Financing Receivable, Troubled Debt Restructuring [Line Items]
Number of Contracts | contract		2		5
Amortized cost of loans, modified	660,000	$ 690,000	660,000	$ 7,889,000
Total commercial real estate | 1-4 family properties
Financing Receivable, Troubled Debt Restructuring [Line Items]
Number of Contracts | contract		4		11
Amortized cost of loans, modified	2,062,000	$ 1,984,000	3,388,000	$ 3,197,000
Total commercial real estate | Land and development
Financing Receivable, Troubled Debt Restructuring [Line Items]
Number of Contracts | contract		1		4
Amortized cost of loans, modified	0	$ 437,000	0	$ 3,168,000
Total consumer
Financing Receivable, Troubled Debt Restructuring [Line Items]
Number of Contracts | contract		21		41
Amortized cost of loans, modified	1,882,000	$ 2,941,000	2,457,000	$ 5,039,000
Total consumer | Consumer mortgages
Financing Receivable, Troubled Debt Restructuring [Line Items]
Number of Contracts | contract		3		10
Amortized cost of loans, modified	695,000	$ 321,000	807,000	$ 1,442,000
Total consumer | Home equity
Financing Receivable, Troubled Debt Restructuring [Line Items]
Number of Contracts | contract		14		25
Amortized cost of loans, modified	615,000	$ 2,529,000	716,000	$ 3,458,000
Total consumer | Other consumer loans
Financing Receivable, Troubled Debt Restructuring [Line Items]
Number of Contracts | contract		4		6
Amortized cost of loans, modified	$ 572,000	$ 91,000	$ 934,000	$ 139,000
Below Market Interest Rate
Financing Receivable, Troubled Debt Restructuring [Line Items]
Amortized cost of loans, modified		36,724,000		67,207,000
Below Market Interest Rate | Total commercial and industrial
Financing Receivable, Troubled Debt Restructuring [Line Items]
Amortized cost of loans, modified		30,964,000		54,968,000
Below Market Interest Rate | Total commercial and industrial | Commercial, financial and agricultural
Financing Receivable, Troubled Debt Restructuring [Line Items]
Amortized cost of loans, modified		8,534,000		26,434,000
Below Market Interest Rate | Total commercial and industrial | Owner-occupied
Financing Receivable, Troubled Debt Restructuring [Line Items]
Amortized cost of loans, modified		22,430,000		28,534,000
Below Market Interest Rate | Total commercial real estate
Financing Receivable, Troubled Debt Restructuring [Line Items]
Amortized cost of loans, modified		3,111,000		7,644,000
Below Market Interest Rate | Total commercial real estate | Investment properties
Financing Receivable, Troubled Debt Restructuring [Line Items]
Amortized cost of loans, modified		690,000		1,279,000
Below Market Interest Rate | Total commercial real estate | 1-4 family properties
Financing Receivable, Troubled Debt Restructuring [Line Items]
Amortized cost of loans, modified		1,984,000		3,197,000
Below Market Interest Rate | Total commercial real estate | Land and development
Financing Receivable, Troubled Debt Restructuring [Line Items]
Amortized cost of loans, modified		437,000		3,168,000
Below Market Interest Rate | Total consumer
Financing Receivable, Troubled Debt Restructuring [Line Items]
Amortized cost of loans, modified		2,649,000		4,595,000
Below Market Interest Rate | Total consumer | Consumer mortgages
Financing Receivable, Troubled Debt Restructuring [Line Items]
Amortized cost of loans, modified		159,000		1,176,000
Below Market Interest Rate | Total consumer | Home equity
Financing Receivable, Troubled Debt Restructuring [Line Items]
Amortized cost of loans, modified		2,490,000		3,419,000
Below Market Interest Rate | Total consumer | Other consumer loans
Financing Receivable, Troubled Debt Restructuring [Line Items]
Amortized cost of loans, modified		0		0
Term Extension
Financing Receivable, Troubled Debt Restructuring [Line Items]
Amortized cost of loans, modified		558,000		11,718,000
Term Extension | Total commercial and industrial
Financing Receivable, Troubled Debt Restructuring [Line Items]
Amortized cost of loans, modified		266,000		4,664,000
Term Extension | Total commercial and industrial | Commercial, financial and agricultural
Financing Receivable, Troubled Debt Restructuring [Line Items]
Amortized cost of loans, modified		266,000		807,000
Term Extension | Total commercial and industrial | Owner-occupied
Financing Receivable, Troubled Debt Restructuring [Line Items]
Amortized cost of loans, modified		0		3,857,000
Term Extension | Total commercial real estate
Financing Receivable, Troubled Debt Restructuring [Line Items]
Amortized cost of loans, modified		0		6,610,000
Term Extension | Total commercial real estate | Investment properties
Financing Receivable, Troubled Debt Restructuring [Line Items]
Amortized cost of loans, modified		0		6,610,000
Term Extension | Total commercial real estate | 1-4 family properties
Financing Receivable, Troubled Debt Restructuring [Line Items]
Amortized cost of loans, modified		0		0
Term Extension | Total commercial real estate | Land and development
Financing Receivable, Troubled Debt Restructuring [Line Items]
Amortized cost of loans, modified		0		0
Term Extension | Total consumer
Financing Receivable, Troubled Debt Restructuring [Line Items]
Amortized cost of loans, modified		292,000		444,000
Term Extension | Total consumer | Consumer mortgages
Financing Receivable, Troubled Debt Restructuring [Line Items]
Amortized cost of loans, modified		162,000		266,000
Term Extension | Total consumer | Home equity
Financing Receivable, Troubled Debt Restructuring [Line Items]
Amortized cost of loans, modified		39,000		39,000
Term Extension | Total consumer | Other consumer loans
Financing Receivable, Troubled Debt Restructuring [Line Items]
Amortized cost of loans, modified		91,000		139,000
Principal Forgiveness
Financing Receivable, Troubled Debt Restructuring [Line Items]
Amortized cost of loans, modified		$ 0		$ 0