Loans and Allowance for Loan Losses - Allowance for Loan Losses (Details) - USD ($) $ in Thousands			3 Months Ended
	Jan. 01, 2023		Mar. 31, 2023		Mar. 31, 2022
Allowance for Loan and Lease Losses [Roll Forward]
Balance at beginning of period	$ 15,588	[1]	$ 15,588	[1]	$ 16,903
Additions
Provision for (release of) credit losses on loans and unfunded commitments			650		(2,500)
Deduction
Writeoff			93		166
Less recoveries on loans			(41)		(42)
Net loan charge-offs (recoveries)			52		124
Balance at end of period			21,979	[1]	14,279
Cumulative Effect, Period of Adoption, Adjustment
Allowance for Loan and Lease Losses [Roll Forward]
Balance at beginning of period	5,793		5,793
Additions
Provision for (release of) credit losses on loans and unfunded commitments	5,800		700
Deduction
Balance at end of period	5,793
Cumulative Effect, Period of Adoption, Adjusted Balance
Allowance for Loan and Lease Losses [Roll Forward]
Balance at beginning of period	21,381		21,381
Deduction
Balance at end of period	21,381
Unfunded Loan Commitment
Allowance for Loan and Lease Losses [Roll Forward]
Balance at beginning of period	0		0
Deduction
Balance at end of period			1,302
Liability for Unfunded Commitments
Provision for credit losses on unfunded commitments			30
Allowance for credit losses on loans and liability for unfunded commitments			23,281
Unfunded Loan Commitment | Cumulative Effect, Period of Adoption, Adjustment
Allowance for Loan and Lease Losses [Roll Forward]
Balance at beginning of period	1,272		1,272
Unfunded Loan Commitment | Cumulative Effect, Period of Adoption, Adjusted Balance
Allowance for Loan and Lease Losses [Roll Forward]
Balance at beginning of period	1,272		1,272
Commercial, Financial, and Agricultural
Allowance for Loan and Lease Losses [Roll Forward]
Balance at beginning of period	2,735		2,735		2,717
Additions
Provision for (release of) credit losses on loans and unfunded commitments			(144)		128
Deduction
Writeoff			30		35
Less recoveries on loans			(9)		(20)
Net loan charge-offs (recoveries)			21		15
Balance at end of period			1,921		2,830
Commercial, Financial, and Agricultural | Cumulative Effect, Period of Adoption, Adjustment
Allowance for Loan and Lease Losses [Roll Forward]
Balance at beginning of period	(649)		(649)
Commercial, Financial, and Agricultural | Cumulative Effect, Period of Adoption, Adjusted Balance
Allowance for Loan and Lease Losses [Roll Forward]
Balance at beginning of period	2,086		2,086
Commercial, Financial, and Agricultural | Unfunded Loan Commitment
Allowance for Loan and Lease Losses [Roll Forward]
Balance at beginning of period	0		0
Deduction
Balance at end of period			124
Liability for Unfunded Commitments
Provision for credit losses on unfunded commitments			20
Allowance for credit losses on loans and liability for unfunded commitments			2,045
Commercial, Financial, and Agricultural | Unfunded Loan Commitment | Cumulative Effect, Period of Adoption, Adjustment
Allowance for Loan and Lease Losses [Roll Forward]
Balance at beginning of period	104		104
Commercial, Financial, and Agricultural | Unfunded Loan Commitment | Cumulative Effect, Period of Adoption, Adjusted Balance
Allowance for Loan and Lease Losses [Roll Forward]
Balance at beginning of period	104		104
Real Estate Construction - Residential
Allowance for Loan and Lease Losses [Roll Forward]
Balance at beginning of period	157		157		137
Additions
Provision for (release of) credit losses on loans and unfunded commitments			183		(77)
Deduction
Writeoff			0		0
Less recoveries on loans			0		0
Net loan charge-offs (recoveries)			0		0
Balance at end of period			631		60
Real Estate Construction - Residential | Cumulative Effect, Period of Adoption, Adjustment
Allowance for Loan and Lease Losses [Roll Forward]
Balance at beginning of period	291		291
Real Estate Construction - Residential | Cumulative Effect, Period of Adoption, Adjusted Balance
Allowance for Loan and Lease Losses [Roll Forward]
Balance at beginning of period	448		448
Real Estate Construction - Residential | Unfunded Loan Commitment
Allowance for Loan and Lease Losses [Roll Forward]
Balance at beginning of period	0		0
Deduction
Balance at end of period			389
Liability for Unfunded Commitments
Provision for credit losses on unfunded commitments			48
Allowance for credit losses on loans and liability for unfunded commitments			1,020
Real Estate Construction - Residential | Unfunded Loan Commitment | Cumulative Effect, Period of Adoption, Adjustment
Allowance for Loan and Lease Losses [Roll Forward]
Balance at beginning of period	341		341
Real Estate Construction - Residential | Unfunded Loan Commitment | Cumulative Effect, Period of Adoption, Adjusted Balance
Allowance for Loan and Lease Losses [Roll Forward]
Balance at beginning of period	341		341
Real Estate Construction - Commercial
Allowance for Loan and Lease Losses [Roll Forward]
Balance at beginning of period	875		875		588
Additions
Provision for (release of) credit losses on loans and unfunded commitments			695		76
Deduction
Writeoff			0		0
Less recoveries on loans			0		0
Net loan charge-offs (recoveries)			0		0
Balance at end of period			4,464		664
Real Estate Construction - Commercial | Cumulative Effect, Period of Adoption, Adjustment
Allowance for Loan and Lease Losses [Roll Forward]
Balance at beginning of period	2,894		2,894
Real Estate Construction - Commercial | Cumulative Effect, Period of Adoption, Adjusted Balance
Allowance for Loan and Lease Losses [Roll Forward]
Balance at beginning of period	3,769		3,769
Real Estate Construction - Commercial | Unfunded Loan Commitment
Allowance for Loan and Lease Losses [Roll Forward]
Balance at beginning of period	0		0
Deduction
Balance at end of period			562
Liability for Unfunded Commitments
Provision for credit losses on unfunded commitments			(7)
Allowance for credit losses on loans and liability for unfunded commitments			5,026
Real Estate Construction - Commercial | Unfunded Loan Commitment | Cumulative Effect, Period of Adoption, Adjustment
Allowance for Loan and Lease Losses [Roll Forward]
Balance at beginning of period	569		569
Real Estate Construction - Commercial | Unfunded Loan Commitment | Cumulative Effect, Period of Adoption, Adjusted Balance
Allowance for Loan and Lease Losses [Roll Forward]
Balance at beginning of period	569		569
Real Estate Mortgage - Residential
Allowance for Loan and Lease Losses [Roll Forward]
Balance at beginning of period	3,329		3,329		2,482
Additions
Provision for (release of) credit losses on loans and unfunded commitments			41		93
Deduction
Writeoff			0		0
Less recoveries on loans			(2)		(3)
Net loan charge-offs (recoveries)			(2)		(3)
Balance at end of period			5,262		2,578
Real Estate Mortgage - Residential | Cumulative Effect, Period of Adoption, Adjustment
Allowance for Loan and Lease Losses [Roll Forward]
Balance at beginning of period	1,890		1,890
Real Estate Mortgage - Residential | Cumulative Effect, Period of Adoption, Adjusted Balance
Allowance for Loan and Lease Losses [Roll Forward]
Balance at beginning of period	5,219		5,219
Real Estate Mortgage - Residential | Unfunded Loan Commitment
Allowance for Loan and Lease Losses [Roll Forward]
Balance at beginning of period	0		0
Deduction
Balance at end of period			110
Liability for Unfunded Commitments
Provision for credit losses on unfunded commitments			3
Allowance for credit losses on loans and liability for unfunded commitments			5,372
Real Estate Mortgage - Residential | Unfunded Loan Commitment | Cumulative Effect, Period of Adoption, Adjustment
Allowance for Loan and Lease Losses [Roll Forward]
Balance at beginning of period	107		107
Real Estate Mortgage - Residential | Unfunded Loan Commitment | Cumulative Effect, Period of Adoption, Adjusted Balance
Allowance for Loan and Lease Losses [Roll Forward]
Balance at beginning of period	107		107
Real Estate Mortgage - Commercial
Allowance for Loan and Lease Losses [Roll Forward]
Balance at beginning of period	8,000		8,000		10,662
Additions
Provision for (release of) credit losses on loans and unfunded commitments			(123)		(2,897)
Deduction
Writeoff			5		75
Less recoveries on loans			(2)		(2)
Net loan charge-offs (recoveries)			3		73
Balance at end of period			9,487		7,692
Real Estate Mortgage - Commercial | Cumulative Effect, Period of Adoption, Adjustment
Allowance for Loan and Lease Losses [Roll Forward]
Balance at beginning of period	1,613		1,613
Real Estate Mortgage - Commercial | Cumulative Effect, Period of Adoption, Adjusted Balance
Allowance for Loan and Lease Losses [Roll Forward]
Balance at beginning of period	9,613		9,613
Real Estate Mortgage - Commercial | Unfunded Loan Commitment
Allowance for Loan and Lease Losses [Roll Forward]
Balance at beginning of period	0		0
Deduction
Balance at end of period			142
Liability for Unfunded Commitments
Provision for credit losses on unfunded commitments			(8)
Allowance for credit losses on loans and liability for unfunded commitments			9,629
Real Estate Mortgage - Commercial | Unfunded Loan Commitment | Cumulative Effect, Period of Adoption, Adjustment
Allowance for Loan and Lease Losses [Roll Forward]
Balance at beginning of period	150		150
Real Estate Mortgage - Commercial | Unfunded Loan Commitment | Cumulative Effect, Period of Adoption, Adjusted Balance
Allowance for Loan and Lease Losses [Roll Forward]
Balance at beginning of period	150		150
Installment and Other Consumer
Allowance for Loan and Lease Losses [Roll Forward]
Balance at beginning of period	326		326		256
Additions
Provision for (release of) credit losses on loans and unfunded commitments			6		56
Deduction
Writeoff			58		56
Less recoveries on loans			(28)		(17)
Net loan charge-offs (recoveries)			30		39
Balance at end of period			222		273
Installment and Other Consumer | Cumulative Effect, Period of Adoption, Adjustment
Allowance for Loan and Lease Losses [Roll Forward]
Balance at beginning of period	(80)		(80)
Installment and Other Consumer | Cumulative Effect, Period of Adoption, Adjusted Balance
Allowance for Loan and Lease Losses [Roll Forward]
Balance at beginning of period	246		246
Installment and Other Consumer | Unfunded Loan Commitment
Allowance for Loan and Lease Losses [Roll Forward]
Balance at beginning of period	0		0
Deduction
Balance at end of period			1
Liability for Unfunded Commitments
Provision for credit losses on unfunded commitments			0
Allowance for credit losses on loans and liability for unfunded commitments			223
Installment and Other Consumer | Unfunded Loan Commitment | Cumulative Effect, Period of Adoption, Adjustment
Allowance for Loan and Lease Losses [Roll Forward]
Balance at beginning of period	1		1
Installment and Other Consumer | Unfunded Loan Commitment | Cumulative Effect, Period of Adoption, Adjusted Balance
Allowance for Loan and Lease Losses [Roll Forward]
Balance at beginning of period	1		1
Un- allocated
Allowance for Loan and Lease Losses [Roll Forward]
Balance at beginning of period	166		166		61
Additions
Provision for (release of) credit losses on loans and unfunded commitments			(8)		121
Deduction
Writeoff			0		0
Less recoveries on loans			0		0
Net loan charge-offs (recoveries)			0		0
Balance at end of period			(8)		$ 182
Un- allocated | Cumulative Effect, Period of Adoption, Adjustment
Allowance for Loan and Lease Losses [Roll Forward]
Balance at beginning of period	(166)		(166)
Un- allocated | Cumulative Effect, Period of Adoption, Adjusted Balance
Allowance for Loan and Lease Losses [Roll Forward]
Balance at beginning of period	0		0
Un- allocated | Unfunded Loan Commitment
Allowance for Loan and Lease Losses [Roll Forward]
Balance at beginning of period	0		0
Deduction
Balance at end of period			(26)
Liability for Unfunded Commitments
Provision for credit losses on unfunded commitments			(26)
Allowance for credit losses on loans and liability for unfunded commitments			(34)
Un- allocated | Unfunded Loan Commitment | Cumulative Effect, Period of Adoption, Adjustment
Allowance for Loan and Lease Losses [Roll Forward]
Balance at beginning of period	0		0
Un- allocated | Unfunded Loan Commitment | Cumulative Effect, Period of Adoption, Adjusted Balance
Allowance for Loan and Lease Losses [Roll Forward]
Balance at beginning of period	$ 0		$ 0

[1] March 31, 2023 amounts include the impacts of the January 1, 2023 adoption of ASU 2013-13. See Note 2 for details.See accompanying notes to the consolidated financial statements (unaudited)