Loans - Risk Categories of Loans by Class of Loans (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended		12 Months Ended
	Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2024	Sep. 30, 2023	Dec. 31, 2023
Financing Receivable, Credit Quality Indicator [Line Items]
Current fiscal year	$ 889,469		$ 889,469		$ 974,245
One year prior to current fiscal year	916,194		916,194		2,264,733
Two years prior to current fiscal year	2,200,799		2,200,799		2,112,263
Three years prior to current fiscal year	1,917,146		1,917,146		804,167
Four years prior to current fiscal year	730,623		730,623		797,510
Prior	2,470,916		2,470,916		2,015,489
Revolving	1,080,134		1,080,134		1,094,533
Total	10,205,281		10,205,281		10,062,940
Current fiscal year, Charge Offs			484		1,272
One year prior to current fiscal year, Charge Offs			394		2,027
Two years prior to current fiscal year, Charge Offs			5,183		2,888
Three years prior to current fiscal year, Charge Offs			13,855		3,413
Four years prior to current fiscal year, Charge Offs			316		845
Prior, Charge Offs			3,525		13,409
Revolving, Charge Offs			880		941
Total, Charge Offs	8,584	$ 13,123	24,637	$ 19,468	24,795
Construction and land development
Financing Receivable, Credit Quality Indicator [Line Items]
Current fiscal year	65,374		65,374		80,750
One year prior to current fiscal year	130,253		130,253		296,450
Two years prior to current fiscal year	191,972		191,972		107,158
Three years prior to current fiscal year	40,297		40,297		20,199
Four years prior to current fiscal year	9,268		9,268		21,942
Prior	42,568		42,568		29,794
Revolving	116,021		116,021		211,329
Total	595,753		595,753		767,622
Current fiscal year, Charge Offs			0		0
One year prior to current fiscal year, Charge Offs			0		0
Two years prior to current fiscal year, Charge Offs			0		0
Three years prior to current fiscal year, Charge Offs			0		0
Four years prior to current fiscal year, Charge Offs			0		0
Prior, Charge Offs			1		0
Revolving, Charge Offs			0		0
Total, Charge Offs	0	0	1	0	0
Construction and land development | Pass
Financing Receivable, Credit Quality Indicator [Line Items]
Current fiscal year	65,374		65,374		80,750
One year prior to current fiscal year	130,253		130,253		295,043
Two years prior to current fiscal year	191,784		191,784		107,158
Three years prior to current fiscal year	40,202		40,202		20,199
Four years prior to current fiscal year	9,268		9,268		21,942
Prior	41,567		41,567		28,902
Revolving	116,021		116,021		210,716
Total	594,469		594,469		764,710
Construction and land development | Special Mention
Financing Receivable, Credit Quality Indicator [Line Items]
Current fiscal year	0		0		0
One year prior to current fiscal year	0		0		1,407
Two years prior to current fiscal year	0		0		0
Three years prior to current fiscal year	0		0		0
Four years prior to current fiscal year	0		0		0
Prior	46		46		393
Revolving	0		0		289
Total	46		46		2,089
Construction and land development | Substandard
Financing Receivable, Credit Quality Indicator [Line Items]
Current fiscal year	0		0		0
One year prior to current fiscal year	0		0		0
Two years prior to current fiscal year	188		188		0
Three years prior to current fiscal year	95		95		0
Four years prior to current fiscal year	0		0		0
Prior	955		955		499
Revolving	0		0		324
Total	1,238		1,238		823
Construction and land development | Doubtful
Financing Receivable, Credit Quality Indicator [Line Items]
Current fiscal year	0		0		0
One year prior to current fiscal year	0		0		0
Two years prior to current fiscal year	0		0		0
Three years prior to current fiscal year	0		0		0
Four years prior to current fiscal year	0		0		0
Prior	0		0		0
Revolving	0		0		0
Total	0		0		0
Commercial real estate - owner occupied
Financing Receivable, Credit Quality Indicator [Line Items]
Current fiscal year	137,538		137,538		145,642
One year prior to current fiscal year	143,353		143,353		278,567
Two years prior to current fiscal year	272,863		272,863		284,262
Three years prior to current fiscal year	269,659		269,659		172,466
Four years prior to current fiscal year	168,326		168,326		179,537
Prior	666,690		666,690		572,790
Revolving	18,385		18,385		37,017
Total	1,676,814		1,676,814		1,670,281
Current fiscal year, Charge Offs			0		0
One year prior to current fiscal year, Charge Offs			0		0
Two years prior to current fiscal year, Charge Offs			179		0
Three years prior to current fiscal year, Charge Offs			0		0
Four years prior to current fiscal year, Charge Offs			0		0
Prior, Charge Offs			125		0
Revolving, Charge Offs			0		0
Total, Charge Offs	2	0	304	0	0
Commercial real estate - owner occupied | Pass
Financing Receivable, Credit Quality Indicator [Line Items]
Current fiscal year	137,538		137,538		145,642
One year prior to current fiscal year	142,285		142,285		272,384
Two years prior to current fiscal year	268,777		268,777		281,870
Three years prior to current fiscal year	267,741		267,741		165,475
Four years prior to current fiscal year	160,404		160,404		171,897
Prior	644,931		644,931		551,177
Revolving	18,034		18,034		36,952
Total	1,639,710		1,639,710		1,625,397
Commercial real estate - owner occupied | Special Mention
Financing Receivable, Credit Quality Indicator [Line Items]
Current fiscal year	0		0		0
One year prior to current fiscal year	0		0		159
Two years prior to current fiscal year	1,640		1,640		1,335
Three years prior to current fiscal year	700		700		0
Four years prior to current fiscal year	2,006		2,006		524
Prior	6,778		6,778		9,122
Revolving	351		351		1
Total	11,475		11,475		11,141
Commercial real estate - owner occupied | Substandard
Financing Receivable, Credit Quality Indicator [Line Items]
Current fiscal year	0		0		0
One year prior to current fiscal year	1,068		1,068		6,024
Two years prior to current fiscal year	2,446		2,446		1,057
Three years prior to current fiscal year	1,218		1,218		6,991
Four years prior to current fiscal year	5,916		5,916		7,116
Prior	14,981		14,981		12,491
Revolving	0		0		64
Total	25,629		25,629		33,743
Commercial real estate - owner occupied | Doubtful
Financing Receivable, Credit Quality Indicator [Line Items]
Current fiscal year	0		0		0
One year prior to current fiscal year	0		0		0
Two years prior to current fiscal year	0		0		0
Three years prior to current fiscal year	0		0		0
Four years prior to current fiscal year	0		0		0
Prior	0		0		0
Revolving	0		0		0
Total	0		0		0
Commercial real estate - non-owner occupied
Financing Receivable, Credit Quality Indicator [Line Items]
Current fiscal year	335,589		335,589		234,226
One year prior to current fiscal year	237,198		237,198		814,591
Two years prior to current fiscal year	893,802		893,802		668,314
Three years prior to current fiscal year	671,878		671,878		301,109
Four years prior to current fiscal year	281,055		281,055		407,458
Prior	1,130,086		1,130,086		867,988
Revolving	23,468		23,468		26,204
Total	3,573,076		3,573,076		3,319,890
Current fiscal year, Charge Offs			0		0
One year prior to current fiscal year, Charge Offs			0		0
Two years prior to current fiscal year, Charge Offs			0		11
Three years prior to current fiscal year, Charge Offs			0		0
Four years prior to current fiscal year, Charge Offs			89		0
Prior, Charge Offs			616		0
Revolving, Charge Offs			0		109
Total, Charge Offs	602	0	705	109	120
Commercial real estate - non-owner occupied | Pass
Financing Receivable, Credit Quality Indicator [Line Items]
Current fiscal year	335,560		335,560		234,226
One year prior to current fiscal year	237,198		237,198		784,525
Two years prior to current fiscal year	863,032		863,032		657,499
Three years prior to current fiscal year	655,870		655,870		288,747
Four years prior to current fiscal year	252,978		252,978		397,031
Prior	1,069,483		1,069,483		841,062
Revolving	23,468		23,468		25,954
Total	3,437,589		3,437,589		3,229,044
Commercial real estate - non-owner occupied | Special Mention
Financing Receivable, Credit Quality Indicator [Line Items]
Current fiscal year	29		29		0
One year prior to current fiscal year	0		0		29,381
Two years prior to current fiscal year	20,248		20,248		2,092
Three years prior to current fiscal year	6,323		6,323		2,964
Four years prior to current fiscal year	16,765		16,765		0
Prior	33,324		33,324		12,120
Revolving	0		0		0
Total	76,689		76,689		46,557
Commercial real estate - non-owner occupied | Substandard
Financing Receivable, Credit Quality Indicator [Line Items]
Current fiscal year	0		0		0
One year prior to current fiscal year	0		0		685
Two years prior to current fiscal year	10,522		10,522		8,723
Three years prior to current fiscal year	9,685		9,685		9,398
Four years prior to current fiscal year	11,312		11,312		10,427
Prior	25,337		25,337		14,806
Revolving	0		0		250
Total	56,856		56,856		44,289
Commercial real estate - non-owner occupied | Doubtful
Financing Receivable, Credit Quality Indicator [Line Items]
Current fiscal year	0		0		0
One year prior to current fiscal year	0		0		0
Two years prior to current fiscal year	0		0		0
Three years prior to current fiscal year	0		0		0
Four years prior to current fiscal year	0		0		0
Prior	1,942		1,942		0
Revolving	0		0		0
Total	1,942		1,942		0
Residential real estate
Financing Receivable, Credit Quality Indicator [Line Items]
Current fiscal year	100,798		100,798		177,303
One year prior to current fiscal year	176,426		176,426		450,366
Two years prior to current fiscal year	505,299		505,299		650,005
Three years prior to current fiscal year	640,616		640,616		161,012
Four years prior to current fiscal year	156,346		156,346		95,660
Prior	462,293		462,293		423,161
Revolving	523,125		523,125		488,185
Total	2,564,903		2,564,903		2,445,692
Current fiscal year, Charge Offs			0		0
One year prior to current fiscal year, Charge Offs			0		0
Two years prior to current fiscal year, Charge Offs			0		0
Three years prior to current fiscal year, Charge Offs			0		44
Four years prior to current fiscal year, Charge Offs			40		0
Prior, Charge Offs			62		159
Revolving, Charge Offs			26		153
Total, Charge Offs	6	44	128	312	356
Residential real estate | Pass
Financing Receivable, Credit Quality Indicator [Line Items]
Current fiscal year	100,622		100,622		177,000
One year prior to current fiscal year	174,995		174,995		450,366
Two years prior to current fiscal year	500,327		500,327		649,086
Three years prior to current fiscal year	640,263		640,263		160,889
Four years prior to current fiscal year	156,208		156,208		95,288
Prior	454,794		454,794		413,719
Revolving	506,576		506,576		479,047
Total	2,533,785		2,533,785		2,425,395
Residential real estate | Special Mention
Financing Receivable, Credit Quality Indicator [Line Items]
Current fiscal year	176		176		208
One year prior to current fiscal year	581		581		0
Two years prior to current fiscal year	0		0		0
Three years prior to current fiscal year	0		0		0
Four years prior to current fiscal year	23		23		58
Prior	436		436		482
Revolving	6,669		6,669		4,004
Total	7,885		7,885		4,752
Residential real estate | Substandard
Financing Receivable, Credit Quality Indicator [Line Items]
Current fiscal year	0		0		95
One year prior to current fiscal year	850		850		0
Two years prior to current fiscal year	4,972		4,972		919
Three years prior to current fiscal year	353		353		123
Four years prior to current fiscal year	115		115		314
Prior	7,063		7,063		8,960
Revolving	9,880		9,880		5,134
Total	23,233		23,233		15,545
Residential real estate | Doubtful
Financing Receivable, Credit Quality Indicator [Line Items]
Current fiscal year	0		0		0
One year prior to current fiscal year	0		0		0
Two years prior to current fiscal year	0		0		0
Three years prior to current fiscal year	0		0		0
Four years prior to current fiscal year	0		0		0
Prior	0		0		0
Revolving	0		0		0
Total	0		0		0
Commercial and financial
Financing Receivable, Credit Quality Indicator [Line Items]
Current fiscal year	237,737		237,737		315,696
One year prior to current fiscal year	213,713		213,713		356,796
Two years prior to current fiscal year	293,975		293,975		355,820
Three years prior to current fiscal year	263,093		263,093		129,454
Four years prior to current fiscal year	100,385		100,385		72,557
Prior	130,656		130,656		102,305
Revolving	335,669		335,669		275,260
Total	1,575,228		1,575,228		1,607,888
Current fiscal year, Charge Offs			0		1,198
One year prior to current fiscal year, Charge Offs			0		117
Two years prior to current fiscal year, Charge Offs			2,747		659
Three years prior to current fiscal year, Charge Offs			10,723		3,007
Four years prior to current fiscal year, Charge Offs			0		582
Prior, Charge Offs			2,621		12,584
Revolving, Charge Offs			695		418
Total, Charge Offs	6,180	11,814	16,786	15,183	18,565
Commercial and financial | Pass
Financing Receivable, Credit Quality Indicator [Line Items]
Current fiscal year	237,737		237,737		315,560
One year prior to current fiscal year	212,954		212,954		336,071
Two years prior to current fiscal year	282,492		282,492		333,113
Three years prior to current fiscal year	248,791		248,791		127,069
Four years prior to current fiscal year	93,641		93,641		66,165
Prior	117,672		117,672		89,002
Revolving	329,015		329,015		269,108
Total	1,522,302		1,522,302		1,536,088
Commercial and financial | Special Mention
Financing Receivable, Credit Quality Indicator [Line Items]
Current fiscal year	0		0		136
One year prior to current fiscal year	759		759		2,167
Two years prior to current fiscal year	2,211		2,211		1,064
Three years prior to current fiscal year	3,023		3,023		1,005
Four years prior to current fiscal year	557		557		503
Prior	2,154		2,154		1,103
Revolving	866		866		2,191
Total	9,570		9,570		8,169
Commercial and financial | Substandard
Financing Receivable, Credit Quality Indicator [Line Items]
Current fiscal year	0		0		0
One year prior to current fiscal year	0		0		18,558
Two years prior to current fiscal year	9,272		9,272		21,643
Three years prior to current fiscal year	11,279		11,279		1,380
Four years prior to current fiscal year	6,187		6,187		5,889
Prior	10,830		10,830		11,842
Revolving	5,788		5,788		3,961
Total	43,356		43,356		63,273
Commercial and financial | Doubtful
Financing Receivable, Credit Quality Indicator [Line Items]
Current fiscal year	0		0		0
One year prior to current fiscal year	0		0		0
Two years prior to current fiscal year	0		0		0
Three years prior to current fiscal year	0		0		0
Four years prior to current fiscal year	0		0		0
Prior	0		0		358
Revolving	0		0		0
Total	0		0		358
Consumer
Financing Receivable, Credit Quality Indicator [Line Items]
Current fiscal year	12,433		12,433		20,628
One year prior to current fiscal year	15,251		15,251		67,963
Two years prior to current fiscal year	42,888		42,888		46,704
Three years prior to current fiscal year	31,603		31,603		19,927
Four years prior to current fiscal year	15,243		15,243		20,356
Prior	38,623		38,623		19,451
Revolving	63,466		63,466		56,538
Total	219,507		219,507		251,567
Current fiscal year, Charge Offs			484		74
One year prior to current fiscal year, Charge Offs			394		1,910
Two years prior to current fiscal year, Charge Offs			2,257		2,218
Three years prior to current fiscal year, Charge Offs			3,132		362
Four years prior to current fiscal year, Charge Offs			187		263
Prior, Charge Offs			100		666
Revolving, Charge Offs			159		261
Total, Charge Offs	1,794	$ 1,265	6,713	$ 3,864	5,754
Consumer | Pass
Financing Receivable, Credit Quality Indicator [Line Items]
Current fiscal year	12,300		12,300		20,557
One year prior to current fiscal year	15,159		15,159		66,699
Two years prior to current fiscal year	39,439		39,439		45,534
Three years prior to current fiscal year	30,070		30,070		19,747
Four years prior to current fiscal year	15,109		15,109		20,300
Prior	37,971		37,971		19,080
Revolving	63,234		63,234		56,473
Total	213,282		213,282		248,390
Consumer | Special Mention
Financing Receivable, Credit Quality Indicator [Line Items]
Current fiscal year	52		52		5
One year prior to current fiscal year	29		29		334
Two years prior to current fiscal year	1,067		1,067		279
Three years prior to current fiscal year	402		402		77
Four years prior to current fiscal year	18		18		5
Prior	312		312		194
Revolving	157		157		65
Total	2,037		2,037		959
Consumer | Substandard
Financing Receivable, Credit Quality Indicator [Line Items]
Current fiscal year	81		81		66
One year prior to current fiscal year	63		63		930
Two years prior to current fiscal year	2,382		2,382		891
Three years prior to current fiscal year	1,131		1,131		103
Four years prior to current fiscal year	116		116		51
Prior	340		340		177
Revolving	75		75		0
Total	4,188		4,188		2,218
Consumer | Doubtful
Financing Receivable, Credit Quality Indicator [Line Items]
Current fiscal year	0		0		0
One year prior to current fiscal year	0		0		0
Two years prior to current fiscal year	0		0		0
Three years prior to current fiscal year	0		0		0
Four years prior to current fiscal year	0		0		0
Prior	0		0		0
Revolving	0		0		0
Total	$ 0		$ 0		$ 0