Loans - Risk Categories of Loans by Class of Loans (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended		12 Months Ended
	Sep. 30, 2025	Sep. 30, 2024	Sep. 30, 2025	Sep. 30, 2024	Dec. 31, 2024
Financing Receivable, Credit Quality Indicator [Line Items]
Current fiscal year	$ 1,266,730		$ 1,266,730		$ 1,275,846
One year prior to current fiscal year	1,374,868		1,374,868		879,200
Two years prior to current fiscal year	845,500		845,500		2,032,826
Three years prior to current fiscal year	1,885,335		1,885,335		1,791,070
Four years prior to current fiscal year	1,646,990		1,646,990		685,675
Prior	2,649,701		2,649,701		2,396,532
Revolving	1,196,991		1,196,991		1,140,302
Revolving Converted to Term	98,058		98,058		98,499
Total	10,964,173		10,964,173		10,299,950
Current fiscal year, Charge Offs			584		789
One year prior to current fiscal year, Charge Offs			145		457
Two years prior to current fiscal year, Charge Offs			208		8,412
Three years prior to current fiscal year, Charge Offs			3,571		15,497
Four years prior to current fiscal year, Charge Offs			1,569		384
Prior, Charge Offs			8,998		4,953
Revolving, Charge Offs			2,440		1,373
Revolving Converted to Term, Charge Offs			0		0
Total, Charge Offs	5,312	$ 8,584	17,515	$ 24,637	31,865
Construction and land development
Financing Receivable, Credit Quality Indicator [Line Items]
Current fiscal year	63,829		63,829		113,993
One year prior to current fiscal year	223,942		223,942		160,801
Two years prior to current fiscal year	120,226		120,226		161,305
Three years prior to current fiscal year	37,134		37,134		39,366
Four years prior to current fiscal year	40,675		40,675		8,547
Prior	32,836		32,836		37,382
Revolving	97,833		97,833		126,659
Revolving Converted to Term	0		0		0
Total	616,475		616,475		648,053
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			115		0
Three years prior to current fiscal year, Charge Offs			0		0
Four years prior to current fiscal year, Charge Offs			24		0
Prior, Charge Offs			0		1
Revolving, Charge Offs			0		0
Revolving Converted to Term, Charge Offs			0		0
Total, Charge Offs	139	0	139	1	1
Construction and land development | Pass
Financing Receivable, Credit Quality Indicator [Line Items]
Current fiscal year	63,829		63,829		113,993
One year prior to current fiscal year	223,942		223,942		160,801
Two years prior to current fiscal year	113,795		113,795		161,122
Three years prior to current fiscal year	36,995		36,995		39,276
Four years prior to current fiscal year	40,593		40,593		8,547
Prior	30,217		30,217		36,342
Revolving	96,647		96,647		126,659
Revolving Converted to Term	0		0		0
Total	606,018		606,018		646,740
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		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	1,640		1,640		75
Revolving	0		0		0
Revolving Converted to Term	0		0		0
Total	1,640		1,640		75
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	6,431		6,431		183
Three years prior to current fiscal year	139		139		90
Four years prior to current fiscal year	82		82		0
Prior	979		979		965
Revolving	1,186		1,186		0
Revolving Converted to Term	0		0		0
Total	8,817		8,817		1,238
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
Revolving Converted to Term	0		0		0
Total	0		0		0
CRE - owner occupied
Financing Receivable, Credit Quality Indicator [Line Items]
Current fiscal year	285,504		285,504		184,401
One year prior to current fiscal year	175,507		175,507		140,258
Two years prior to current fiscal year	168,520		168,520		268,062
Three years prior to current fiscal year	259,700		259,700		260,432
Four years prior to current fiscal year	243,748		243,748		161,990
Prior	739,992		739,992		650,462
Revolving	25,733		25,733		21,024
Revolving Converted to Term	0		0		0
Total	1,898,704		1,898,704		1,686,629
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		179
Three years prior to current fiscal year, Charge Offs			156		0
Four years prior to current fiscal year, Charge Offs			0		0
Prior, Charge Offs			41		162
Revolving, Charge Offs			0		0
Revolving Converted to Term, Charge Offs			0		0
Total, Charge Offs	197	2	197	304	341
CRE - owner occupied | Pass
Financing Receivable, Credit Quality Indicator [Line Items]
Current fiscal year	285,504		285,504		184,312
One year prior to current fiscal year	170,758		170,758		139,197
Two years prior to current fiscal year	154,760		154,760		260,266
Three years prior to current fiscal year	238,736		238,736		257,711
Four years prior to current fiscal year	237,314		237,314		153,702
Prior	692,992		692,992		628,391
Revolving	25,441		25,441		20,674
Revolving Converted to Term	0		0		0
Total	1,805,505		1,805,505		1,644,253
CRE - owner occupied | Special Mention
Financing Receivable, Credit Quality Indicator [Line Items]
Current fiscal year	0		0		0
One year prior to current fiscal year	4,359		4,359		0
Two years prior to current fiscal year	1,950		1,950		4,975
Three years prior to current fiscal year	981		981		2,344
Four years prior to current fiscal year	6,066		6,066		2,418
Prior	25,067		25,067		7,965
Revolving	0		0		1
Revolving Converted to Term	0		0		0
Total	38,423		38,423		17,703
CRE - owner occupied | Substandard
Financing Receivable, Credit Quality Indicator [Line Items]
Current fiscal year	0		0		89
One year prior to current fiscal year	390		390		1,061
Two years prior to current fiscal year	11,810		11,810		2,821
Three years prior to current fiscal year	19,983		19,983		377
Four years prior to current fiscal year	368		368		5,870
Prior	21,933		21,933		14,106
Revolving	292		292		349
Revolving Converted to Term	0		0		0
Total	54,776		54,776		24,673
CRE - 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
Revolving Converted to Term	0		0		0
Total	0		0		0
CRE - non-owner occupied
Financing Receivable, Credit Quality Indicator [Line Items]
Current fiscal year	436,253		436,253		495,388
One year prior to current fiscal year	475,626		475,626		236,306
Two years prior to current fiscal year	240,061		240,061		835,974
Three years prior to current fiscal year	889,374		889,374		593,845
Four years prior to current fiscal year	552,408		552,408		259,479
Prior	1,147,380		1,147,380		1,058,064
Revolving	25,439		25,439		24,752
Revolving Converted to Term	0		0		0
Total	3,766,541		3,766,541		3,503,808
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		89
Prior, Charge Offs			320		1,396
Revolving, Charge Offs			0		0
Revolving Converted to Term, Charge Offs			0		0
Total, Charge Offs	0	602	320	705	1,485
CRE - non-owner occupied | Pass
Financing Receivable, Credit Quality Indicator [Line Items]
Current fiscal year	436,253		436,253		495,361
One year prior to current fiscal year	475,603		475,603		236,306
Two years prior to current fiscal year	237,376		237,376		820,739
Three years prior to current fiscal year	852,842		852,842		581,892
Four years prior to current fiscal year	533,599		533,599		237,777
Prior	1,093,820		1,093,820		1,012,209
Revolving	25,439		25,439		24,752
Revolving Converted to Term	0		0		0
Total	3,654,932		3,654,932		3,409,036
CRE - non-owner occupied | Special Mention
Financing Receivable, Credit Quality Indicator [Line Items]
Current fiscal year	0		0		27
One year prior to current fiscal year	23		23		0
Two years prior to current fiscal year	2,685		2,685		4,773
Three years prior to current fiscal year	9,639		9,639		1,269
Four years prior to current fiscal year	9,679		9,679		5,265
Prior	28,312		28,312		25,245
Revolving	0		0		0
Revolving Converted to Term	0		0		0
Total	50,338		50,338		36,579
CRE - 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		0
Two years prior to current fiscal year	0		0		10,462
Three years prior to current fiscal year	26,893		26,893		10,684
Four years prior to current fiscal year	9,130		9,130		16,437
Prior	25,248		25,248		20,610
Revolving	0		0		0
Revolving Converted to Term	0		0		0
Total	61,271		61,271		58,193
CRE - 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	0		0		0
Revolving	0		0		0
Revolving Converted to Term	0		0		0
Total	0		0		0
Residential real estate
Financing Receivable, Credit Quality Indicator [Line Items]
Current fiscal year	109,079		109,079		93,793
One year prior to current fiscal year	160,349		160,349		146,836
Two years prior to current fiscal year	161,183		161,183		473,777
Three years prior to current fiscal year	457,371		457,371		631,590
Four years prior to current fiscal year	594,426		594,426		152,199
Prior	543,717		543,717		490,081
Revolving	570,611		570,611		530,010
Revolving Converted to Term	98,058		98,058		98,499
Total	2,694,794		2,694,794		2,616,785
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			144		0
Four years prior to current fiscal year, Charge Offs			206		40
Prior, Charge Offs			31		62
Revolving, Charge Offs			19		32
Revolving Converted to Term, Charge Offs			0		0
Total, Charge Offs	174	6	400	128	134
Residential real estate | Pass
Financing Receivable, Credit Quality Indicator [Line Items]
Current fiscal year	109,079		109,079		93,644
One year prior to current fiscal year	160,199		160,199		146,836
Two years prior to current fiscal year	161,070		161,070		469,071
Three years prior to current fiscal year	455,764		455,764		630,378
Four years prior to current fiscal year	589,322		589,322		152,116
Prior	536,212		536,212		483,150
Revolving	562,638		562,638		517,136
Revolving Converted to Term	96,742		96,742		96,256
Total	2,671,026		2,671,026		2,588,587
Residential real estate | Special Mention
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	745		745		164
Revolving	3,057		3,057		3,434
Revolving Converted to Term	60		60		22
Total	3,862		3,862		3,620
Residential real estate | Substandard
Financing Receivable, Credit Quality Indicator [Line Items]
Current fiscal year	0		0		149
One year prior to current fiscal year	150		150		0
Two years prior to current fiscal year	113		113		4,706
Three years prior to current fiscal year	1,607		1,607		1,212
Four years prior to current fiscal year	5,104		5,104		83
Prior	6,760		6,760		6,767
Revolving	4,916		4,916		9,440
Revolving Converted to Term	1,256		1,256		2,221
Total	19,906		19,906		24,578
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
Revolving Converted to Term	0		0		0
Total	0		0		0
Commercial and financial
Financing Receivable, Credit Quality Indicator [Line Items]
Current fiscal year	359,975		359,975		373,569
One year prior to current fiscal year	325,395		325,395		180,920
Two years prior to current fiscal year	145,842		145,842		262,422
Three years prior to current fiscal year	217,762		217,762		245,076
Four years prior to current fiscal year	199,672		199,672		89,343
Prior	149,063		149,063		129,784
Revolving	410,223		410,223		370,240
Revolving Converted to Term	0		0		0
Total	1,807,932		1,807,932		1,651,354
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			85		2,762
Three years prior to current fiscal year, Charge Offs			2,022		10,669
Four years prior to current fiscal year, Charge Offs			1,231		0
Prior, Charge Offs			8,563		3,111
Revolving, Charge Offs			2,262		1,074
Revolving Converted to Term, Charge Offs			0		0
Total, Charge Offs	4,431	6,180	14,163	16,786	17,616
Commercial and financial | Pass
Financing Receivable, Credit Quality Indicator [Line Items]
Current fiscal year	359,975		359,975		373,569
One year prior to current fiscal year	324,504		324,504		180,423
Two years prior to current fiscal year	144,819		144,819		253,120
Three years prior to current fiscal year	212,084		212,084		232,427
Four years prior to current fiscal year	192,896		192,896		82,964
Prior	138,289		138,289		117,276
Revolving	403,396		403,396		362,701
Revolving Converted to Term	0		0		0
Total	1,775,963		1,775,963		1,602,480
Commercial and financial | Special Mention
Financing Receivable, Credit Quality Indicator [Line Items]
Current fiscal year	0		0		0
One year prior to current fiscal year	891		891		382
Two years prior to current fiscal year	429		429		755
Three years prior to current fiscal year	707		707		2,839
Four years prior to current fiscal year	2,450		2,450		232
Prior	4,195		4,195		1,904
Revolving	1,228		1,228		2,163
Revolving Converted to Term	0		0		0
Total	9,900		9,900		8,275
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		115
Two years prior to current fiscal year	594		594		8,547
Three years prior to current fiscal year	4,971		4,971		9,810
Four years prior to current fiscal year	3,730		3,730		6,147
Prior	6,579		6,579		10,604
Revolving	5,599		5,599		5,376
Revolving Converted to Term	0		0		0
Total	21,473		21,473		40,599
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	596		596		0
Prior	0		0		0
Revolving	0		0		0
Revolving Converted to Term	0		0		0
Total	596		596		0
Consumer
Financing Receivable, Credit Quality Indicator [Line Items]
Current fiscal year	12,090		12,090		14,702
One year prior to current fiscal year	14,049		14,049		14,079
Two years prior to current fiscal year	9,668		9,668		31,286
Three years prior to current fiscal year	23,994		23,994		20,761
Four years prior to current fiscal year	16,061		16,061		14,117
Prior	36,713		36,713		30,759
Revolving	67,152		67,152		67,617
Revolving Converted to Term	0		0		0
Total	179,727		179,727		193,321
Current fiscal year, Charge Offs			584		789
One year prior to current fiscal year, Charge Offs			145		457
Two years prior to current fiscal year, Charge Offs			8		5,471
Three years prior to current fiscal year, Charge Offs			1,249		4,828
Four years prior to current fiscal year, Charge Offs			108		255
Prior, Charge Offs			43		221
Revolving, Charge Offs			159		267
Revolving Converted to Term, Charge Offs			0		0
Total, Charge Offs	371	$ 1,794	2,296	$ 6,713	12,288
Consumer | Pass
Financing Receivable, Credit Quality Indicator [Line Items]
Current fiscal year	12,087		12,087		14,627
One year prior to current fiscal year	14,011		14,011		14,049
Two years prior to current fiscal year	9,649		9,649		26,332
Three years prior to current fiscal year	21,437		21,437		20,721
Four years prior to current fiscal year	16,061		16,061		11,682
Prior	36,400		36,400		30,022
Revolving	67,065		67,065		67,562
Revolving Converted to Term	0		0		0
Total	176,710		176,710		184,995
Consumer | Special Mention
Financing Receivable, Credit Quality Indicator [Line Items]
Current fiscal year	3		3		0
One year prior to current fiscal year	36		36		5
Two years prior to current fiscal year	0		0		1
Three years prior to current fiscal year	2,512		2,512		0
Four years prior to current fiscal year	0		0		0
Prior	0		0		0
Revolving	46		46		54
Revolving Converted to Term	0		0		0
Total	2,597		2,597		60
Consumer | Substandard
Financing Receivable, Credit Quality Indicator [Line Items]
Current fiscal year	0		0		75
One year prior to current fiscal year	2		2		25
Two years prior to current fiscal year	19		19		4,953
Three years prior to current fiscal year	45		45		40
Four years prior to current fiscal year	0		0		2,435
Prior	313		313		737
Revolving	41		41		1
Revolving Converted to Term	0		0		0
Total	420		420		8,266
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
Revolving Converted to Term	0		0		0
Total	$ 0		$ 0		$ 0