Loans and Allowance for Loan Losses (Troubled Debt Restructurings) (Details)	3 Months Ended
	Mar. 31, 2022 USD ($) Contract	Mar. 31, 2021 USD ($) Contract
Financing Receivable, Troubled Debt Restructuring [Line Items]
Number of Contracts | Contract	79	142
Recorded investment	$ 41,643,000	$ 15,475,000
Net charge-offs	$ 0	$ 0
Total commercial and industrial
Financing Receivable, Troubled Debt Restructuring [Line Items]
Number of Contracts | Contract	46	45
Recorded investment	$ 28,402,000	$ 7,449,000
Total commercial and industrial | Commercial, financial and agricultural
Financing Receivable, Troubled Debt Restructuring [Line Items]
Number of Contracts | Contract	33	40
Recorded investment	$ 18,441,000	$ 5,796,000
Total commercial and industrial | Owner-occupied
Financing Receivable, Troubled Debt Restructuring [Line Items]
Number of Contracts | Contract	13	5
Recorded investment	$ 9,961,000	$ 1,653,000
Total commercial real estate
Financing Receivable, Troubled Debt Restructuring [Line Items]
Number of Contracts | Contract	13	11
Recorded investment	$ 11,143,000	$ 2,529,000
Total commercial real estate | Investment properties
Financing Receivable, Troubled Debt Restructuring [Line Items]
Number of Contracts | Contract	3	5
Recorded investment	$ 7,199,000	$ 1,984,000
Total commercial real estate | 1-4 family properties
Financing Receivable, Troubled Debt Restructuring [Line Items]
Number of Contracts | Contract	7	5
Recorded investment	$ 1,213,000	$ 502,000
Total commercial real estate | Land and development
Financing Receivable, Troubled Debt Restructuring [Line Items]
Number of Contracts | Contract	3	1
Recorded investment	$ 2,731,000	$ 43,000
Total consumer
Financing Receivable, Troubled Debt Restructuring [Line Items]
Number of Contracts | Contract	20	86
Recorded investment	$ 2,098,000	$ 5,497,000
Total consumer | Consumer mortgages
Financing Receivable, Troubled Debt Restructuring [Line Items]
Number of Contracts | Contract	7	0
Recorded investment	$ 1,121,000	$ 0
Total consumer | Home equity
Financing Receivable, Troubled Debt Restructuring [Line Items]
Number of Contracts | Contract	11	13
Recorded investment	$ 929,000	$ 749,000
Total consumer | Other consumer loans
Financing Receivable, Troubled Debt Restructuring [Line Items]
Number of Contracts | Contract	2	73
Recorded investment	$ 48,000	$ 4,748,000
Below Market Interest Rate
Financing Receivable, Troubled Debt Restructuring [Line Items]
Recorded investment	30,483,000	7,650,000
Below Market Interest Rate | Total commercial and industrial
Financing Receivable, Troubled Debt Restructuring [Line Items]
Recorded investment	24,004,000	4,487,000
Below Market Interest Rate | Total commercial and industrial | Commercial, financial and agricultural
Financing Receivable, Troubled Debt Restructuring [Line Items]
Recorded investment	17,900,000	3,233,000
Below Market Interest Rate | Total commercial and industrial | Owner-occupied
Financing Receivable, Troubled Debt Restructuring [Line Items]
Recorded investment	6,104,000	1,254,000
Below Market Interest Rate | Total commercial real estate
Financing Receivable, Troubled Debt Restructuring [Line Items]
Recorded investment	4,533,000	2,447,000
Below Market Interest Rate | Total commercial real estate | Investment properties
Financing Receivable, Troubled Debt Restructuring [Line Items]
Recorded investment	589,000	1,984,000
Below Market Interest Rate | Total commercial real estate | 1-4 family properties
Financing Receivable, Troubled Debt Restructuring [Line Items]
Recorded investment	1,213,000	463,000
Below Market Interest Rate | Total commercial real estate | Land and development
Financing Receivable, Troubled Debt Restructuring [Line Items]
Recorded investment	2,731,000	0
Below Market Interest Rate | Total consumer
Financing Receivable, Troubled Debt Restructuring [Line Items]
Recorded investment	1,946,000	716,000
Below Market Interest Rate | Total consumer | Consumer mortgages
Financing Receivable, Troubled Debt Restructuring [Line Items]
Recorded investment	1,017,000	0
Below Market Interest Rate | Total consumer | Home equity
Financing Receivable, Troubled Debt Restructuring [Line Items]
Recorded investment	929,000	587,000
Below Market Interest Rate | Total consumer | Other consumer loans
Financing Receivable, Troubled Debt Restructuring [Line Items]
Recorded investment	0	129,000
Other Concessions
Financing Receivable, Troubled Debt Restructuring [Line Items]
Recorded investment	11,160,000	7,825,000
Other Concessions | Total commercial and industrial
Financing Receivable, Troubled Debt Restructuring [Line Items]
Recorded investment	4,398,000	2,962,000
Other Concessions | Total commercial and industrial | Commercial, financial and agricultural
Financing Receivable, Troubled Debt Restructuring [Line Items]
Recorded investment	541,000	2,563,000
Other Concessions | Total commercial and industrial | Owner-occupied
Financing Receivable, Troubled Debt Restructuring [Line Items]
Recorded investment	3,857,000	399,000
Other Concessions | Total commercial real estate
Financing Receivable, Troubled Debt Restructuring [Line Items]
Recorded investment	6,610,000	82,000
Other Concessions | Total commercial real estate | Investment properties
Financing Receivable, Troubled Debt Restructuring [Line Items]
Recorded investment	6,610,000	0
Other Concessions | Total commercial real estate | 1-4 family properties
Financing Receivable, Troubled Debt Restructuring [Line Items]
Recorded investment	0	39,000
Other Concessions | Total commercial real estate | Land and development
Financing Receivable, Troubled Debt Restructuring [Line Items]
Recorded investment	0	43,000
Other Concessions | Total consumer
Financing Receivable, Troubled Debt Restructuring [Line Items]
Recorded investment	152,000	4,781,000
Other Concessions | Total consumer | Consumer mortgages
Financing Receivable, Troubled Debt Restructuring [Line Items]
Recorded investment	104,000	0
Other Concessions | Total consumer | Home equity
Financing Receivable, Troubled Debt Restructuring [Line Items]
Recorded investment	0	162,000
Other Concessions | Total consumer | Other consumer loans
Financing Receivable, Troubled Debt Restructuring [Line Items]
Recorded investment	48,000	4,619,000
Principal Forgiveness
Financing Receivable, Troubled Debt Restructuring [Line Items]
Recorded investment	$ 0	$ 0