Loans, Allowance for Credit Losses, and Asset Quality Information - Schedule of Recorded Investment in Loans by Credit Quality Indicators (Details) - USD ($) $ in Thousands	Sep. 30, 2022	Dec. 31, 2021
Financing Receivable, Credit Quality Indicator [Line Items]
Year one	$ 1,721,694	$ 2,380,302
Year two	2,045,609	1,329,007
Year three	944,016	637,027
Year four	487,309	396,981
Year five	304,017	317,729
Prior	505,778	478,114
Revolving	517,997	544,259
Total	6,526,420	6,083,419
Unamortized net deferred loan fees	(1,134)	(1,704)
Total loans	6,525,286	6,081,715
Commercial, financial, and agricultural
Financing Receivable, Credit Quality Indicator [Line Items]
Total	617,538	648,997
Consumer loans
Financing Receivable, Credit Quality Indicator [Line Items]
Year one	14,513	14,960
Year two	27,360	25,508
Year three	4,276	2,965
Year four	1,340	1,730
Year five	1,040	673
Prior	502	550
Revolving	11,620	10,852
Total	60,651	57,238
Commercial, financial, and agricultural
Financing Receivable, Credit Quality Indicator [Line Items]
Year one	127,245	206,779
Year two	138,519	140,588
Year three	90,881	74,385
Year four	59,194	76,470
Year five	67,463	16,745
Prior	22,745	17,597
Revolving	111,491	116,433
Total	617,538	648,997
Real estate – construction, land development & other land loans | Real estate, commercial
Financing Receivable, Credit Quality Indicator [Line Items]
Year one	442,098	575,195
Year two	357,532	134,674
Year three	54,568	74,208
Year four	37,424	12,648
Year five	5,630	9,882
Prior	8,162	8,196
Revolving	13,822	13,746
Total	919,236	828,549
Real estate – mortgage – residential (1-4 family) first mortgages | Real estate, mortgage
Financing Receivable, Credit Quality Indicator [Line Items]
Year one	198,436	242,926
Year two	301,368	225,388
Year three	192,909	121,148
Year four	102,676	83,945
Year five	67,625	87,050
Prior	261,238	249,433
Revolving	8,300	12,076
Total	1,132,552	1,021,966
Real estate – mortgage – home equity loans / lines of credit | Real estate, mortgage
Financing Receivable, Credit Quality Indicator [Line Items]
Year one	1,081	3,380
Year two	2,383	595
Year three	460	525
Year four	338	1,304
Year five	869	245
Prior	2,210	2,275
Revolving	315,877	323,608
Total	323,218	331,932
Real estate – mortgage – commercial and other | Real estate, commercial
Financing Receivable, Credit Quality Indicator [Line Items]
Year one	938,321	1,337,062
Year two	1,218,447	802,254
Year three	600,922	363,796
Year four	286,337	220,884
Year five	161,390	203,134
Prior	210,921	200,063
Revolving	56,887	67,544
Total	3,473,225	3,194,737
Pass | Consumer loans
Financing Receivable, Credit Quality Indicator [Line Items]
Year one	14,507	14,960
Year two	27,261	25,431
Year three	4,271	2,965
Year four	1,339	1,722
Year five	1,040	673
Prior	490	525
Revolving	11,565	10,810
Total	60,473	57,086
Pass | Commercial, financial, and agricultural
Financing Receivable, Credit Quality Indicator [Line Items]
Year one	126,775	204,945
Year two	136,151	138,540
Year three	89,302	71,369
Year four	56,471	66,645
Year five	59,693	16,009
Prior	22,133	17,492
Revolving	110,825	112,933
Total	601,350	627,933
Pass | Real estate – construction, land development & other land loans | Real estate, commercial
Financing Receivable, Credit Quality Indicator [Line Items]
Year one	438,062	573,613
Year two	357,411	133,888
Year three	54,529	69,066
Year four	32,455	12,455
Year five	5,461	9,764
Prior	8,146	8,190
Revolving	13,579	13,737
Total	909,643	820,713
Pass | Real estate – mortgage – residential (1-4 family) first mortgages | Real estate, mortgage
Financing Receivable, Credit Quality Indicator [Line Items]
Year one	197,181	241,619
Year two	300,207	224,617
Year three	192,410	120,097
Year four	101,787	82,531
Year five	66,548	86,074
Prior	250,772	234,950
Revolving	7,298	11,051
Total	1,116,203	1,000,939
Pass | Real estate – mortgage – home equity loans / lines of credit | Real estate, mortgage
Financing Receivable, Credit Quality Indicator [Line Items]
Year one	1,042	3,111
Year two	2,046	498
Year three	365	439
Year four	256	1,304
Year five	869	245
Prior	1,902	1,649
Revolving	308,219	317,319
Total	314,699	324,565
Pass | Real estate – mortgage – commercial and other | Real estate, commercial
Financing Receivable, Credit Quality Indicator [Line Items]
Year one	934,199	1,328,156
Year two	1,215,815	796,992
Year three	596,502	355,885
Year four	278,815	211,118
Year five	152,596	197,165
Prior	206,579	197,659
Revolving	55,726	66,104
Total	3,440,232	3,153,079
Special Mention | Consumer loans
Financing Receivable, Credit Quality Indicator [Line Items]
Year one	0	0
Year two	0	4
Year three	0	0
Year four	0	0
Year five	0	0
Prior	0	0
Revolving	0	0
Total	0	4
Special Mention | Commercial, financial, and agricultural
Financing Receivable, Credit Quality Indicator [Line Items]
Year one	30	225
Year two	175	1,255
Year three	677	1,313
Year four	1,472	2,729
Year five	906	225
Prior	244	9
Revolving	85	2,348
Total	3,589	8,104
Special Mention | Real estate – construction, land development & other land loans | Real estate, commercial
Financing Receivable, Credit Quality Indicator [Line Items]
Year one	3,444	41
Year two	9	737
Year three	4	5,095
Year four	4,061	110
Year five	103	104
Prior	0	2
Revolving	0	9
Total	7,621	6,098
Special Mention | Real estate – mortgage – residential (1-4 family) first mortgages | Real estate, mortgage
Financing Receivable, Credit Quality Indicator [Line Items]
Year one	852	888
Year two	350	615
Year three	274	516
Year four	304	229
Year five	106	323
Prior	2,382	3,237
Revolving	100	94
Total	4,368	5,902
Special Mention | Real estate – mortgage – home equity loans / lines of credit | Real estate, mortgage
Financing Receivable, Credit Quality Indicator [Line Items]
Year one	0	194
Year two	179	0
Year three	0	15
Year four	0	0
Year five	0	0
Prior	18	19
Revolving	977	1,341
Total	1,174	1,569
Special Mention | Real estate – mortgage – commercial and other | Real estate, commercial
Financing Receivable, Credit Quality Indicator [Line Items]
Year one	954	1,759
Year two	1,153	4,849
Year three	4,305	5,801
Year four	4,750	3,741
Year five	1,918	2,072
Prior	2,596	1,801
Revolving	670	1,440
Total	16,346	21,463
Classified | Consumer loans
Financing Receivable, Credit Quality Indicator [Line Items]
Year one	6	0
Year two	99	73
Year three	5	0
Year four	1	8
Year five	0	0
Prior	12	25
Revolving	55	42
Total	178	148
Classified | Commercial, financial, and agricultural
Financing Receivable, Credit Quality Indicator [Line Items]
Year one	440	1,609
Year two	2,193	793
Year three	902	1,703
Year four	1,251	7,096
Year five	6,864	511
Prior	368	96
Revolving	581	1,152
Total	12,599	12,960
Classified | Real estate – construction, land development & other land loans | Real estate, commercial
Financing Receivable, Credit Quality Indicator [Line Items]
Year one	592	1,541
Year two	112	49
Year three	35	47
Year four	908	83
Year five	66	14
Prior	16	4
Revolving	243	0
Total	1,972	1,738
Classified | Real estate – mortgage – residential (1-4 family) first mortgages | Real estate, mortgage
Financing Receivable, Credit Quality Indicator [Line Items]
Year one	403	419
Year two	811	156
Year three	225	535
Year four	585	1,185
Year five	971	653
Prior	8,084	11,246
Revolving	902	931
Total	11,981	15,125
Classified | Real estate – mortgage – home equity loans / lines of credit | Real estate, mortgage
Financing Receivable, Credit Quality Indicator [Line Items]
Year one	39	75
Year two	158	97
Year three	95	71
Year four	82	0
Year five	0	0
Prior	290	607
Revolving	6,681	4,948
Total	7,345	5,798
Classified | Real estate – mortgage – commercial and other | Real estate, commercial
Financing Receivable, Credit Quality Indicator [Line Items]
Year one	3,168	7,147
Year two	1,479	413
Year three	115	2,110
Year four	2,772	6,025
Year five	6,876	3,897
Prior	1,746	603
Revolving	491	0
Total	$ 16,647	$ 20,195