Loans - Loan Portfolio by Credit Quality Indicators (Details) - USD ($) $ in Thousands	3 Months Ended	12 Months Ended
	Mar. 31, 2024	Dec. 31, 2023
Loans and Leases Receivable Disclosure [Line Items]
2024	$ 67,599	$ 380,926
2023, current period gross write-offs	0	412
2023	344,580	617,018
2022, current period gross write-offs	168	672
2022	596,940	309,936
2021, current period gross write-offs	502	513
2021	298,136	133,315
2020, current period gross write-offs	178	202
2020	125,816	101,724
2019, current period gross write-offs	0	9
Prior	311,677	227,993
Prior, current period gross write-offs	20	136
Revolvers	111,058	110,019
Revolvers, current period gross write-offs	0	0
Revolvers converted to term loans	3,212	2,539
Revolvers converted to term loans, current period gross write-offs	0	0
Loans, net of unearned income	1,859,018	1,883,470
Loans, current period gross write-offs	868	1,944
Commercial real estate
Loans and Leases Receivable Disclosure [Line Items]
Loans, net of unearned income	1,205,205	1,221,521
Commercial real estate | Construction, land & land development
Loans and Leases Receivable Disclosure [Line Items]
2024	13,992	113,379
2023, current period gross write-offs	0	0
2023	97,831	92,869
2022, current period gross write-offs	0	0
2022	82,713	27,361
2021, current period gross write-offs	0	0
2021	28,149	5,654
2020, current period gross write-offs	0	0
2020	4,352	1,020
2019, current period gross write-offs	0	0
Prior	6,563	5,945
Prior, current period gross write-offs	0	0
Revolvers	369	887
Revolvers, current period gross write-offs	0	0
Revolvers converted to term loans	31	31
Revolvers converted to term loans, current period gross write-offs	0	0
Loans, net of unearned income	234,000	247,146
Loans, current period gross write-offs	0	0
Commercial real estate | Other commercial real estate
Loans and Leases Receivable Disclosure [Line Items]
2024	6,662	64,194
2023, current period gross write-offs	0	0
2023	79,786	347,522
2022, current period gross write-offs	0	0
2022	345,659	205,122
2021, current period gross write-offs	0	69
2021	198,180	90,742
2020, current period gross write-offs	0	0
2020	86,872	85,342
2019, current period gross write-offs	0	0
Prior	228,786	154,463
Prior, current period gross write-offs	20	0
Revolvers	22,762	24,911
Revolvers, current period gross write-offs	0	0
Revolvers converted to term loans	2,498	2,079
Revolvers converted to term loans, current period gross write-offs	0	0
Loans, net of unearned income	971,205	974,375
Loans, current period gross write-offs	20	69
Residential real estate
Loans and Leases Receivable Disclosure [Line Items]
2024	6,983	78,944
2023, current period gross write-offs	0	253
2023	73,995	118,339
2022, current period gross write-offs	0	492
2022	115,771	51,380
2021, current period gross write-offs	70	26
2021	50,223	22,238
2020, current period gross write-offs	0	0
2020	21,201	9,461
2019, current period gross write-offs	0	0
Prior	56,712	52,460
Prior, current period gross write-offs	0	0
Revolvers	22,294	23,312
Revolvers, current period gross write-offs	0	0
Revolvers converted to term loans	98	100
Revolvers converted to term loans, current period gross write-offs	0	0
Loans, net of unearned income	347,277	356,234
Loans, current period gross write-offs	70	771
Commercial, financial & agricultural
Loans and Leases Receivable Disclosure [Line Items]
2024	18,071	71,170
2023, current period gross write-offs	0	150
2023	56,485	54,205
2022, current period gross write-offs	52	168
2022	49,349	24,028
2021, current period gross write-offs	428	408
2021	19,830	13,424
2020, current period gross write-offs	178	200
2020	12,390	4,947
2019, current period gross write-offs	0	9
Prior	17,965	14,207
Prior, current period gross write-offs	0	134
Revolvers	65,173	60,447
Revolvers, current period gross write-offs	0	0
Revolvers converted to term loans	574	328
Revolvers converted to term loans, current period gross write-offs	0	0
Loans, net of unearned income	239,837	242,756
Loans, current period gross write-offs	658	1,069
Consumer and other
Loans and Leases Receivable Disclosure [Line Items]
2024	21,891	53,239
2023, current period gross write-offs	0	9
2023	36,483	4,083
2022, current period gross write-offs	116	12
2022	3,448	2,045
2021, current period gross write-offs	4	10
2021	1,754	1,257
2020, current period gross write-offs	0	2
2020	1,001	954
2019, current period gross write-offs	0	0
Prior	1,651	918
Prior, current period gross write-offs	0	2
Revolvers	460	462
Revolvers, current period gross write-offs	0	0
Revolvers converted to term loans	11	1
Revolvers converted to term loans, current period gross write-offs	0	0
Loans, net of unearned income	66,699	62,959
Loans, current period gross write-offs	120	35
Pass
Loans and Leases Receivable Disclosure [Line Items]
2024	67,269	372,428
2023	339,374	605,801
2022	582,990	306,140
2021	294,476	129,904
2020	122,058	94,292
Prior	287,213	209,087
Revolvers	107,745	106,474
Revolvers converted to term loans	2,828	2,469
Loans, net of unearned income	1,803,953	1,826,595
Pass | Commercial real estate | Construction, land & land development
Loans and Leases Receivable Disclosure [Line Items]
2024	13,992	112,587
2023	97,191	91,981
2022	82,284	27,332
2021	28,121	5,654
2020	4,352	1,000
Prior	6,398	5,765
Revolvers	89	605
Revolvers converted to term loans	31	31
Loans, net of unearned income	232,458	244,955
Pass | Commercial real estate | Other commercial real estate
Loans and Leases Receivable Disclosure [Line Items]
2024	6,359	61,816
2023	76,903	341,656
2022	336,599	204,145
2021	197,131	88,629
2020	84,422	79,123
Prior	214,138	145,374
Revolvers	21,999	24,158
Revolvers converted to term loans	2,154	2,031
Loans, net of unearned income	939,705	946,932
Pass | Residential real estate
Loans and Leases Receivable Disclosure [Line Items]
2024	6,967	78,088
2023	73,145	116,704
2022	113,983	50,986
2021	49,805	21,892
2020	20,828	8,510
Prior	47,464	43,038
Revolvers	21,938	22,642
Revolvers converted to term loans	98	100
Loans, net of unearned income	334,228	341,960
Pass | Commercial, financial & agricultural
Loans and Leases Receivable Disclosure [Line Items]
2024	18,071	66,820
2023	55,857	51,439
2022	46,732	21,673
2021	17,713	12,489
2020	11,469	4,734
Prior	17,594	14,002
Revolvers	63,259	58,607
Revolvers converted to term loans	534	306
Loans, net of unearned income	231,229	230,070
Pass | Consumer and other
Loans and Leases Receivable Disclosure [Line Items]
2024	21,880	53,117
2023	36,278	4,021
2022	3,392	2,004
2021	1,706	1,240
2020	987	925
Prior	1,619	908
Revolvers	460	462
Revolvers converted to term loans	11	1
Loans, net of unearned income	66,333	62,678
Special Mention
Loans and Leases Receivable Disclosure [Line Items]
2024	319	5,988
2023	2,101	4,653
2022	4,592	1,215
2021	861	2,920
2020	2,915	6,625
Prior	15,803	9,451
Revolvers	2,164	2,225
Revolvers converted to term loans	344	48
Loans, net of unearned income	29,099	33,125
Special Mention | Commercial real estate | Construction, land & land development
Loans and Leases Receivable Disclosure [Line Items]
2024	0	792
2023	640	0
2022	0	25
2021	24	0
2020	0	0
Prior	25	29
Revolvers	280	282
Revolvers converted to term loans	0	0
Loans, net of unearned income	969	1,128
Special Mention | Commercial real estate | Other commercial real estate
Loans and Leases Receivable Disclosure [Line Items]
2024	303	75
2023	76	3,251
2022	3,458	766
2021	484	2,113
2020	2,094	5,733
Prior	10,267	4,694
Revolvers	554	545
Revolvers converted to term loans	344	48
Loans, net of unearned income	17,580	17,225
Special Mention | Residential real estate
Loans and Leases Receivable Disclosure [Line Items]
2024	16	856
2023	850	466
2022	517	10
2021	43	50
2020	92	679
Prior	5,310	4,687
Revolvers	326	424
Revolvers converted to term loans	0	0
Loans, net of unearned income	7,154	7,172
Special Mention | Commercial, financial & agricultural
Loans and Leases Receivable Disclosure [Line Items]
2024	0	4,186
2023	364	894
2022	579	376
2021	277	745
2020	719	188
Prior	180	40
Revolvers	1,004	974
Revolvers converted to term loans	0	0
Loans, net of unearned income	3,123	7,403
Special Mention | Consumer and other
Loans and Leases Receivable Disclosure [Line Items]
2024	0	79
2023	171	42
2022	38	38
2021	33	12
2020	10	25
Prior	21	1
Revolvers	0	0
Revolvers converted to term loans	0	0
Loans, net of unearned income	273	197
Substandard
Loans and Leases Receivable Disclosure [Line Items]
2024	11	2,510
2023	3,105	6,564
2022	9,358	2,581
2021	2,799	491
2020	843	807
Prior	8,661	9,455
Revolvers	1,149	1,320
Revolvers converted to term loans	40	22
Loans, net of unearned income	25,966	23,750
Substandard | Commercial real estate | Construction, land & land development
Loans and Leases Receivable Disclosure [Line Items]
2024	0	0
2023	0	888
2022	429	4
2021	4	0
2020	0	20
Prior	140	151
Revolvers	0	0
Revolvers converted to term loans	0	0
Loans, net of unearned income	573	1,063
Substandard | Commercial real estate | Other commercial real estate
Loans and Leases Receivable Disclosure [Line Items]
2024	0	2,303
2023	2,807	2,615
2022	5,602	211
2021	565	0
2020	356	486
Prior	4,381	4,395
Revolvers	209	208
Revolvers converted to term loans	0	0
Loans, net of unearned income	13,920	10,218
Substandard | Residential real estate
Loans and Leases Receivable Disclosure [Line Items]
2024	0	0
2023	0	1,169
2022	1,271	384
2021	375	296
2020	281	272
Prior	3,938	4,735
Revolvers	30	246
Revolvers converted to term loans	0	0
Loans, net of unearned income	5,895	7,102
Substandard | Commercial, financial & agricultural
Loans and Leases Receivable Disclosure [Line Items]
2024	0	164
2023	264	1,872
2022	2,038	1,979
2021	1,840	190
2020	202	25
Prior	191	165
Revolvers	910	866
Revolvers converted to term loans	40	22
Loans, net of unearned income	5,485	5,283
Substandard | Consumer and other
Loans and Leases Receivable Disclosure [Line Items]
2024	11	43
2023	34	20
2022	18	3
2021	15	5
2020	4	4
Prior	11	9
Revolvers	0	0
Revolvers converted to term loans	0	0
Loans, net of unearned income	$ 93	$ 84