Loans - Impaired Loan Data (Details) - USD ($) $ in Thousands	9 Months Ended	12 Months Ended
	Sep. 30, 2022	Dec. 31, 2021
Unpaid Contractual Principal Balance
With No Related Allowance Recorded	$ 6,302	$ 8,298
With An Allowance Recorded	1,398	1,115
Loans Including Purchased Credit Impaired Loans	8,512	11,612
Recorded Investment
With No Related Allowance Recorded	6,302	7,503
With An Allowance Recorded	1,453	1,256
Loans Including Purchased Credit Impaired Loans	8,567	10,748
Related Allowance
With An Allowance Recorded	504	256
Total Impaired Loans	521	376
Average Recorded Investment
With No Related Allowance Recorded	7,115	13,563
With An Allowance Recorded	1,833	5,538
Loans Including Purchased Credit Impaired Loans	10,136	20,068
Purchase credit impaired
Unpaid Contractual Principal Balance
Loans Including Purchased Credit Impaired Loans	812	2,199
Recorded Investment
Loans Including Purchased Credit Impaired Loans	812	1,989
Related Allowance
With An Allowance Recorded	17	120
Purchased Credit Impaired Loans	17	120
Average Recorded Investment
Loans Including Purchased Credit Impaired Loans	1,188	967
Residential real estate
Unpaid Contractual Principal Balance
With No Related Allowance Recorded	640	958
With An Allowance Recorded	299	685
Loans Including Purchased Credit Impaired Loans	939	1,647
Recorded Investment
With No Related Allowance Recorded	640	997
With An Allowance Recorded	350	773
Loans Including Purchased Credit Impaired Loans	990	1,770
Related Allowance
With An Allowance Recorded	57	108
Total Impaired Loans	57	114
Average Recorded Investment
With No Related Allowance Recorded	804	1,083
With An Allowance Recorded	781	1,029
Loans Including Purchased Credit Impaired Loans	1,599	2,119
Residential real estate | Purchase credit impaired
Unpaid Contractual Principal Balance
Loans Including Purchased Credit Impaired Loans	0	4
Recorded Investment
Loans Including Purchased Credit Impaired Loans	0	0
Related Allowance
With An Allowance Recorded	0	6
Purchased Credit Impaired Loans	0	6
Average Recorded Investment
Loans Including Purchased Credit Impaired Loans	14	7
Commercial, financial & agricultural
Unpaid Contractual Principal Balance
With No Related Allowance Recorded	708	75
With An Allowance Recorded	452	0
Loans Including Purchased Credit Impaired Loans	1,160	75
Recorded Investment
With No Related Allowance Recorded	708	75
With An Allowance Recorded	456	0
Loans Including Purchased Credit Impaired Loans	1,164	75
Related Allowance
With An Allowance Recorded	251	0
Total Impaired Loans	251	0
Average Recorded Investment
With No Related Allowance Recorded	325	56
With An Allowance Recorded	369	79
Loans Including Purchased Credit Impaired Loans	694	170
Commercial, financial & agricultural | Purchase credit impaired
Unpaid Contractual Principal Balance
Loans Including Purchased Credit Impaired Loans	0	0
Recorded Investment
Loans Including Purchased Credit Impaired Loans	0	0
Related Allowance
With An Allowance Recorded	0	0
Purchased Credit Impaired Loans	0	0
Average Recorded Investment
Loans Including Purchased Credit Impaired Loans	0	35
Consumer and other
Unpaid Contractual Principal Balance
With No Related Allowance Recorded	0	0
With An Allowance Recorded	0	0
Loans Including Purchased Credit Impaired Loans	0	192
Recorded Investment
With No Related Allowance Recorded	0	0
With An Allowance Recorded	0	0
Loans Including Purchased Credit Impaired Loans	0	73
Related Allowance
With An Allowance Recorded	0	0
Total Impaired Loans	0	96
Average Recorded Investment
With No Related Allowance Recorded	1	0
With An Allowance Recorded	0	1
Loans Including Purchased Credit Impaired Loans	114	73
Consumer and other | Purchase credit impaired
Unpaid Contractual Principal Balance
Loans Including Purchased Credit Impaired Loans	0	192
Recorded Investment
Loans Including Purchased Credit Impaired Loans	0	73
Related Allowance
With An Allowance Recorded	0	96
Purchased Credit Impaired Loans	0	96
Average Recorded Investment
Loans Including Purchased Credit Impaired Loans	113	72
Construction, land and land development
Unpaid Contractual Principal Balance
With No Related Allowance Recorded	0	62
With An Allowance Recorded	235	0
Loans Including Purchased Credit Impaired Loans	235	62
Recorded Investment
With No Related Allowance Recorded	0	62
With An Allowance Recorded	235	0
Loans Including Purchased Credit Impaired Loans	235	62
Related Allowance
With An Allowance Recorded	70	0
Total Impaired Loans	70	0
Average Recorded Investment
With No Related Allowance Recorded	21	4,311
With An Allowance Recorded	59	0
Loans Including Purchased Credit Impaired Loans	80	4,362
Construction, land and land development | Purchase credit impaired
Unpaid Contractual Principal Balance
Loans Including Purchased Credit Impaired Loans	0	0
Recorded Investment
Loans Including Purchased Credit Impaired Loans	0	0
Related Allowance
With An Allowance Recorded	0	0
Purchased Credit Impaired Loans	0	0
Average Recorded Investment
Loans Including Purchased Credit Impaired Loans	0	51
Commercial real estate
Unpaid Contractual Principal Balance
With No Related Allowance Recorded	4,954	7,203
With An Allowance Recorded	412	430
Loans Including Purchased Credit Impaired Loans	6,178	9,636
Recorded Investment
With No Related Allowance Recorded	4,954	6,369
With An Allowance Recorded	412	483
Loans Including Purchased Credit Impaired Loans	6,178	8,768
Related Allowance
With An Allowance Recorded	126	148
Total Impaired Loans	143	166
Average Recorded Investment
With No Related Allowance Recorded	5,964	8,113
With An Allowance Recorded	624	4,429
Loans Including Purchased Credit Impaired Loans	7,649	13,344
Commercial real estate | Purchase credit impaired
Unpaid Contractual Principal Balance
Loans Including Purchased Credit Impaired Loans	812	2,003
Recorded Investment
Loans Including Purchased Credit Impaired Loans	812	1,916
Related Allowance
With An Allowance Recorded	17	18
Purchased Credit Impaired Loans	17	18
Average Recorded Investment
Loans Including Purchased Credit Impaired Loans	$ 1,061	$ 802