Loans - Gross Charge-Offs (Details) - USD ($) $ in Thousands	3 Months Ended		12 Months Ended
	Mar. 31, 2024	Mar. 31, 2023	Dec. 31, 2023
Financing Receivable, Excluding Accrued Interest, Allowance for Credit Loss, Writeoff, by Origination Year [Abstract]
Current year	$ 0		$ 1,810
Prior year	27		2,301
Two years prior	25		617
Three years prior	13		310
Four years prior	0		725
Prior	634		12,412
Revolving Loans	211		865
Total Charge-offs	910	$ 6,457	19,040
Commercial, financial, agricultural
Financing Receivable, Excluding Accrued Interest, Allowance for Credit Loss, Writeoff, by Origination Year [Abstract]
Current year	0		898
Prior year	0		1,909
Two years prior	9		235
Three years prior	0		131
Four years prior	0		635
Prior	129		4,165
Revolving Loans	211		865
Total Charge-offs	349	529	8,838
Lease financing
Financing Receivable, Excluding Accrued Interest, Allowance for Credit Loss, Writeoff, by Origination Year [Abstract]
Current year			883
Prior year			273
Two years prior			248
Three years prior			72
Four years prior			48
Prior			0
Revolving Loans			0
Total Charge-offs	0	0	1,524
Real estate – construction:
Financing Receivable, Excluding Accrued Interest, Allowance for Credit Loss, Writeoff, by Origination Year [Abstract]
Total Charge-offs	0	0
Real estate – construction: | Residential
Financing Receivable, Excluding Accrued Interest, Allowance for Credit Loss, Writeoff, by Origination Year [Abstract]
Current year			0
Prior year			57
Two years prior			0
Three years prior			0
Four years prior			0
Prior			0
Revolving Loans			0
Total Charge-offs			57
Real estate – 1-4 family mortgage:
Financing Receivable, Excluding Accrued Interest, Allowance for Credit Loss, Writeoff, by Origination Year [Abstract]
Current year	0		0
Prior year	0		17
Two years prior	0		91
Three years prior	13		72
Four years prior	0		35
Prior	69		202
Revolving Loans	0		0
Total Charge-offs	82	3	417
Real estate – 1-4 family mortgage: | Primary
Financing Receivable, Excluding Accrued Interest, Allowance for Credit Loss, Writeoff, by Origination Year [Abstract]
Current year	0		0
Prior year	0		17
Two years prior	0		0
Three years prior	13		0
Four years prior	0		0
Prior	0		92
Revolving Loans	0		0
Total Charge-offs	13		109
Real estate – 1-4 family mortgage: | Home equity
Financing Receivable, Excluding Accrued Interest, Allowance for Credit Loss, Writeoff, by Origination Year [Abstract]
Current year	0		0
Prior year	0		0
Two years prior	0		0
Three years prior	0		0
Four years prior	0		25
Prior	24		90
Revolving Loans	0		0
Total Charge-offs	24		115
Real estate – 1-4 family mortgage: | Rental/investment
Financing Receivable, Excluding Accrued Interest, Allowance for Credit Loss, Writeoff, by Origination Year [Abstract]
Current year	0		0
Prior year	0		0
Two years prior	0		91
Three years prior	0		72
Four years prior	0		10
Prior	45		20
Revolving Loans	0		0
Total Charge-offs	45		193
Real Estate - Commercial Mortgage
Financing Receivable, Excluding Accrued Interest, Allowance for Credit Loss, Writeoff, by Origination Year [Abstract]
Current year			0
Prior year			0
Two years prior			0
Three years prior			0
Four years prior			0
Prior			5,568
Revolving Loans			0
Total Charge-offs	0	5,115	5,568
Real Estate - Commercial Mortgage | Owner-occupied
Financing Receivable, Excluding Accrued Interest, Allowance for Credit Loss, Writeoff, by Origination Year [Abstract]
Current year			0
Prior year			0
Two years prior			0
Three years prior			0
Four years prior			0
Prior			582
Revolving Loans			0
Total Charge-offs			582
Real Estate - Commercial Mortgage | Non-owner occupied
Financing Receivable, Excluding Accrued Interest, Allowance for Credit Loss, Writeoff, by Origination Year [Abstract]
Current year			0
Prior year			0
Two years prior			0
Three years prior			0
Four years prior			0
Prior			4,986
Revolving Loans			0
Total Charge-offs			4,986
Installment loans to individuals
Financing Receivable, Excluding Accrued Interest, Allowance for Credit Loss, Writeoff, by Origination Year [Abstract]
Current year	0		29
Prior year	27		45
Two years prior	16		43
Three years prior	0		35
Four years prior	0		7
Prior	436		2,477
Revolving Loans	0		0
Total Charge-offs	$ 479	$ 810	$ 2,636