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Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 326
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+ References

Reference 1: http://www.xbrl.org/2003/role/exampleRef
-Topic 326
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-Section 55
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Reference 3: http://www.xbrl.org/2003/role/disclosureRef
-Topic 326
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Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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-SubTopic 20
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Reference 2: http://www.xbrl.org/2003/role/exampleRef
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Allowance for Credit Losses (Portfolio Credit Quality) (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2023	Jun. 30, 2022	Dec. 31, 2022
Loan portfolio by credit quality indicator
2023	$ 1,925,932		$ 1,925,932
2022	2,284,653		2,284,653		$ 3,048,975
2021	1,558,724		1,558,724		2,081,483
2020	734,661		734,661		988,625
2019	449,575		449,575		543,277
2018/Prior	619,532		619,532		468,848
Prior					299,395
Total loans	7,573,077		7,573,077		7,430,603
Current-period gross writeoffs
Total	2,982	$ 2,092	5,015	$ 4,421
Commercial, financial and agricultural
Loan portfolio by credit quality indicator
Total loans	4,280,036		4,280,036		4,373,373
Commercial, financial and agricultural \| Domestic \| Commercial.
Loan portfolio by credit quality indicator
2023	413,761		413,761
2022	465,706		465,706		766,789
2021	423,811		423,811		525,241
2020	58,607		58,607		97,498
2019	25,499		25,499		35,917
2018/Prior	65,813		65,813		43,841
Prior					29,468
Total loans	1,453,197		1,453,197		1,498,754
Current-period gross writeoffs
2023			2,443
2022			2,045
2021			9
2020			264
Prior			2
Total	2,792	2,001	4,763	4,113
Commercial, financial and agricultural \| Domestic \| Commercial. \| Pass
Loan portfolio by credit quality indicator
2023	389,737		389,737
2022	432,583		432,583		736,462
2021	423,509		423,509		524,879
2020	58,607		58,607		96,401
2019	25,484		25,484		35,917
2018/Prior	65,813		65,813		43,792
Prior					29,464
Total loans	1,395,733		1,395,733		1,466,915
Commercial, financial and agricultural \| Domestic \| Commercial. \| Special Review
Loan portfolio by credit quality indicator
2022	300		300		377
2021	189		189		213
Total loans	489		489		590
Commercial, financial and agricultural \| Domestic \| Commercial. \| Watch List - Substandard
Loan portfolio by credit quality indicator
2023	23,992		23,992
2022	1,543		1,543		161
2021	113		113		149
2020					143
2019	15		15
2018/Prior					49
Total loans	25,663		25,663		502
Commercial, financial and agricultural \| Domestic \| Commercial. \| Watch List - Doubtful
Loan portfolio by credit quality indicator
2023	32		32
2022	31,280		31,280		29,789
2020					954
Prior					4
Total loans	31,312		31,312		30,747
Commercial, financial and agricultural \| Domestic \| Commercial real estate: farmland & commercial
Loan portfolio by credit quality indicator
2023	570,512		570,512
2022	684,110		684,110		833,401
2021	418,308		418,308		584,381
2020	320,981		320,981		511,194
2019	210,677		210,677		232,633
2018/Prior	314,082		314,082		325,214
Prior					81,295
Total loans	2,518,670		2,518,670		2,568,118
Commercial, financial and agricultural \| Domestic \| Commercial real estate: farmland & commercial \| Pass
Loan portfolio by credit quality indicator
2023	427,809		427,809
2022	681,701		681,701		811,117
2021	418,069		418,069		584,134
2020	317,679		317,679		456,200
2019	210,586		210,586		232,537
2018/Prior	314,081		314,081		325,214
Prior					81,295
Total loans	2,369,925		2,369,925		2,490,497
Commercial, financial and agricultural \| Domestic \| Commercial real estate: farmland & commercial \| Special Review
Loan portfolio by credit quality indicator
2023	69,450		69,450
2022					2,855
2020	829		829		842
Total loans	70,279		70,279		3,697
Commercial, financial and agricultural \| Domestic \| Commercial real estate: farmland & commercial \| Watch List - Pass
Loan portfolio by credit quality indicator
2023	16,722		16,722
2022	88		88		17,060
2021	239		239		247
Total loans	17,049		17,049		17,307
Commercial, financial and agricultural \| Domestic \| Commercial real estate: farmland & commercial \| Watch List - Substandard
Loan portfolio by credit quality indicator
2023	56,333		56,333
2022	2,232		2,232		2,275
2020	2,473		2,473		54,152
2019	91		91		96
2018/Prior	1		1
Total loans	61,130		61,130		56,523
Commercial, financial and agricultural \| Domestic \| Commercial real estate: farmland & commercial \| Watch List - Doubtful
Loan portfolio by credit quality indicator
2023	198		198
2022	89		89		94
Total loans	287		287		94
Commercial, financial and agricultural \| Domestic \| Commercial real estate: multifamily
Loan portfolio by credit quality indicator
2023	54,095		54,095
2022	123,940		123,940		127,797
2021	43,201		43,201		87,469
2020	58,737		58,737		59,035
2019	11,321		11,321		12,026
2018/Prior	16,875		16,875		5,490
Prior					14,684
Total loans	308,169		308,169		306,501
Commercial, financial and agricultural \| Domestic \| Commercial real estate: multifamily \| Pass
Loan portfolio by credit quality indicator
2023	54,095		54,095
2022	123,832		123,832		127,680
2021	43,201		43,201		87,469
2020	58,737		58,737		59,035
2019	11,321		11,321		12,026
2018/Prior	16,875		16,875		5,490
Prior					14,684
Total loans	308,061		308,061		306,384
Commercial, financial and agricultural \| Domestic \| Commercial real estate: multifamily \| Watch List - Doubtful
Loan portfolio by credit quality indicator
2022	108		108		117
Total loans	108		108		117
Obligations of states and political subdivisions
Loan portfolio by credit quality indicator
Total loans	2,202,187		2,202,187		1,989,669
Obligations of states and political subdivisions \| Domestic \| Commercial Real Estate: other construction and land development
Loan portfolio by credit quality indicator
2023	670,519		670,519
2022	725,690		725,690		933,657
2021	479,217		479,217		666,754
2020	166,136		166,136		173,918
2019	129,626		129,626		175,106
2018/Prior	30,999		30,999		35,069
Prior					5,165
Total loans	2,202,187		2,202,187		1,989,669
Current-period gross writeoffs
Total				2
Obligations of states and political subdivisions \| Domestic \| Commercial Real Estate: other construction and land development \| Pass
Loan portfolio by credit quality indicator
2023	650,337		650,337
2022	713,105		713,105		913,675
2021	479,217		479,217		666,347
2020	166,136		166,136		173,824
2019	129,419		129,419		174,897
2018/Prior	30,999		30,999		35,069
Prior					5,165
Total loans	2,169,213		2,169,213		1,968,977
Obligations of states and political subdivisions \| Domestic \| Commercial Real Estate: other construction and land development \| Special Review
Loan portfolio by credit quality indicator
2023	20,094		20,094
2022	2,500		2,500
2019	207		207		209
Total loans	22,801		22,801		209
Obligations of states and political subdivisions \| Domestic \| Commercial Real Estate: other construction and land development \| Watch List - Doubtful
Loan portfolio by credit quality indicator
2023	88		88
2022	10,085		10,085		19,982
2021					407
2020					94
Total loans	10,173		10,173		20,483
Real estate - mortgage
Loan portfolio by credit quality indicator
Total loans	866,427		866,427		865,994
Real estate - mortgage \| Domestic \| Residential: first lien
Loan portfolio by credit quality indicator
2023	93,380		93,380
2022	91,473		91,473		138,848
2021	72,612		72,612		82,826
2020	43,195		43,195		49,591
2019	30,667		30,667		40,985
2018/Prior	87,575		87,575		33,814
Prior					79,660
Total loans	418,902		418,902		425,724
Current-period gross writeoffs
Total		57		156
Real estate - mortgage \| Domestic \| Residential: first lien \| Pass
Loan portfolio by credit quality indicator
2023	93,380		93,380
2022	91,403		91,403		138,771
2021	72,269		72,269		82,466
2020	43,195		43,195		49,591
2019	30,667		30,667		40,985
2018/Prior	87,575		87,575		33,814
Prior					79,660
Total loans	418,489		418,489		425,287
Real estate - mortgage \| Domestic \| Residential: first lien \| Watch List - Substandard
Loan portfolio by credit quality indicator
2021	343		343		360
Total loans	343		343		360
Real estate - mortgage \| Domestic \| Residential: first lien \| Watch List - Doubtful
Loan portfolio by credit quality indicator
2022	70		70		77
Total loans	70		70		77
Real estate - mortgage \| Domestic \| Residential Junior Lien
Loan portfolio by credit quality indicator
2023	40,647		40,647
2022	86,506		86,506		92,256
2021	103,393		103,393		109,127
2020	81,966		81,966		91,130
2019	37,583		37,583		41,273
2018/Prior	97,430		97,430		21,975
Prior					84,509
Total loans	447,525		447,525		440,270
Current-period gross writeoffs
Prior			165
Total	164		165	28
Real estate - mortgage \| Domestic \| Residential Junior Lien \| Pass
Loan portfolio by credit quality indicator
2023	40,329		40,329
2022	86,506		86,506		92,256
2021	103,393		103,393		108,815
2020	81,966		81,966		91,130
2019	37,583		37,583		41,273
2018/Prior	97,430		97,430		21,975
Prior					84,509
Total loans	447,207		447,207		439,958
Real estate - mortgage \| Domestic \| Residential Junior Lien \| Watch List - Doubtful
Loan portfolio by credit quality indicator
2023	318		318
2021					312
Total loans	318		318		312
Consumer
Loan portfolio by credit quality indicator
Total loans	43,411		43,411		41,592
Consumer \| Domestic
Loan portfolio by credit quality indicator
2023	22,184		22,184
2022	15,853		15,853		31,962
2021	3,187		3,187		6,603
2020	441		441		897
2019	228		228		489
2018/Prior	1,518		1,518		28
Prior					1,613
Total loans	43,411		43,411		41,592
Current-period gross writeoffs
2023			9
2022			73
2021			4
Prior			1
Total	26	$ 34	87	$ 122
Consumer \| Domestic \| Pass
Loan portfolio by credit quality indicator
2023	22,184		22,184
2022	15,853		15,853		31,962
2021	3,187		3,187		6,603
2020	441		441		897
2019	228		228		489
2018/Prior	1,518		1,518		28
Prior					1,613
Total loans	43,411		43,411		41,592
Foreign.
Loan portfolio by credit quality indicator
Total loans	181,016		181,016		159,975
Foreign. \| Foreign
Loan portfolio by credit quality indicator
2023	60,834		60,834
2022	91,375		91,375		124,265
2021	14,995		14,995		19,082
2020	4,598		4,598		5,362
2019	3,974		3,974		4,848
2018/Prior	5,240		5,240		3,417
Prior					3,001
Total loans	181,016		181,016		159,975
Foreign. \| Foreign \| Pass
Loan portfolio by credit quality indicator
2023	60,834		60,834
2022	91,375		91,375		124,265
2021	14,995		14,995		19,082
2020	4,598		4,598		5,362
2019	3,974		3,974		4,848
2018/Prior	5,240		5,240		3,417
Prior					3,001
Total loans	$ 181,016		$ 181,016		$ 159,975