Loans and Allowance for Credit Losses - Schedule of Risk Category Of Loans In The Portfolio (Details) - USD ($) $ in Thousands	3 Months Ended		12 Months Ended
	Mar. 31, 2026	Mar. 31, 2025	Dec. 31, 2025
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss, by Origination Year [Abstract]
Current fiscal year	$ 585,026		$ 2,227,867
Fiscal year before current fiscal year	2,167,759		1,515,960
Two years before current fiscal year	1,411,735		1,123,960
Three years before current fiscal year	1,051,596		1,669,056
Four years before current fiscal year	1,604,207		1,259,295
Prior	3,450,425		2,399,670
Revolving loans amortized cost basis	1,271,164		1,248,408
Total	11,541,912		11,444,216
Gross write-offs for the year ended December 31, 2025
Current fiscal year	462		4,853
Fiscal year before current fiscal year	820		1,589
Two years before current fiscal year	507		3,341
Three years before current fiscal year	836		3,478
Four years before current fiscal year	574		1,476
Prior	682		2,788
Revolving loans amortized cost basis	1,617		3,671
Total	5,498	$ 5,627	21,196
Current or less than 30 days past due
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss, by Origination Year [Abstract]
Total	11,445,545		11,363,135
30 - 89 Days past due
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss, by Origination Year [Abstract]
Total	44,292		35,075
Construction and development
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss, by Origination Year [Abstract]
Current fiscal year	21,826		165,978
Fiscal year before current fiscal year	167,507		207,556
Two years before current fiscal year	169,495		32,976
Three years before current fiscal year	17,905		77,104
Four years before current fiscal year	65,685		36,631
Prior	33,193		17,936
Revolving loans amortized cost basis	37,070		32,568
Total	512,681		570,749
Gross write-offs for the year ended December 31, 2025
Current fiscal year	0		0
Fiscal year before current fiscal year	0		0
Two years before current fiscal year	0		0
Three years before current fiscal year	0		0
Four years before current fiscal year	0		0
Prior	0		14
Revolving loans amortized cost basis	0		0
Total	0	0	14
Construction and development | Current or less than 30 days past due
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss, by Origination Year [Abstract]
Total	512,330		570,668
Construction and development | 30 - 89 Days past due
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss, by Origination Year [Abstract]
Total	274		0
Construction and development | Pass
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss, by Origination Year [Abstract]
Current fiscal year	21,826		165,449
Fiscal year before current fiscal year	165,052		207,312
Two years before current fiscal year	166,525		27,395
Three years before current fiscal year	17,905		71,348
Four years before current fiscal year	59,312		36,631
Prior	32,641		17,334
Revolving loans amortized cost basis	37,070		32,568
Total	500,331		558,037
Construction and development | Watch
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss, by Origination Year [Abstract]
Current fiscal year	0		529
Fiscal year before current fiscal year	542		244
Two years before current fiscal year	358		1,486
Three years before current fiscal year	0		3,490
Four years before current fiscal year	4,109		0
Prior	0		0
Revolving loans amortized cost basis	0		0
Total	5,009		5,749
Construction and development | Substandard
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss, by Origination Year [Abstract]
Current fiscal year	0		0
Fiscal year before current fiscal year	1,913		0
Two years before current fiscal year	2,612		4,095
Three years before current fiscal year	0		2,266
Four years before current fiscal year	2,264		0
Prior	475		521
Revolving loans amortized cost basis	0		0
Total	7,264		6,882
Construction and development | Non-accrual
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss, by Origination Year [Abstract]
Current fiscal year	0		0
Fiscal year before current fiscal year	0		0
Two years before current fiscal year	0		0
Three years before current fiscal year	0		0
Four years before current fiscal year	0		0
Prior	77		81
Revolving loans amortized cost basis	0		0
Total	77		81
Commercial, financial & agricultural
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss, by Origination Year [Abstract]
Current fiscal year	109,223		387,544
Fiscal year before current fiscal year	346,695		259,890
Two years before current fiscal year	236,286		151,320
Three years before current fiscal year	138,552		159,081
Four years before current fiscal year	142,718		102,178
Prior	295,641		223,609
Revolving loans amortized cost basis	471,574		477,665
Total	1,740,689		1,761,287
Gross write-offs for the year ended December 31, 2025
Current fiscal year	17		1,393
Fiscal year before current fiscal year	550		358
Two years before current fiscal year	275		1,148
Three years before current fiscal year	173		824
Four years before current fiscal year			100
Four years before current fiscal year	(1)
Prior	334		746
Revolving loans amortized cost basis	496		180
Total	1,844	786	4,749
Commercial, financial & agricultural | Current or less than 30 days past due
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss, by Origination Year [Abstract]
Total	1,726,479		1,751,575
Commercial, financial & agricultural | 30 - 89 Days past due
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss, by Origination Year [Abstract]
Total	3,890		4,097
Commercial, financial & agricultural | Pass
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss, by Origination Year [Abstract]
Current fiscal year	108,245		383,642
Fiscal year before current fiscal year	344,881		257,121
Two years before current fiscal year	233,866		147,877
Three years before current fiscal year	135,276		154,197
Four years before current fiscal year	138,574		94,111
Prior	277,179		211,879
Revolving loans amortized cost basis	469,569		475,596
Total	1,707,590		1,724,423
Commercial, financial & agricultural | Watch
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss, by Origination Year [Abstract]
Current fiscal year	769		1,883
Fiscal year before current fiscal year	433		1,294
Two years before current fiscal year	1,318		891
Three years before current fiscal year	684		652
Four years before current fiscal year	444		98
Prior	5,466		204
Revolving loans amortized cost basis	1,082		1,082
Total	10,196		6,104
Commercial, financial & agricultural | Substandard
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss, by Origination Year [Abstract]
Current fiscal year	209		1,981
Fiscal year before current fiscal year	1,167		1,428
Two years before current fiscal year	911		1,113
Three years before current fiscal year	1,178		1,242
Four years before current fiscal year	534		7,922
Prior	8,306		11,211
Revolving loans amortized cost basis	316		282
Total	12,621		25,179
Commercial, financial & agricultural | Non-accrual
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss, by Origination Year [Abstract]
Current fiscal year	0		38
Fiscal year before current fiscal year	214		47
Two years before current fiscal year	191		1,439
Three years before current fiscal year	1,414		2,990
Four years before current fiscal year	3,166		47
Prior	4,690		315
Revolving loans amortized cost basis	607		705
Total	10,282		5,581
Commercial real estate
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss, by Origination Year [Abstract]
Total	4,850,469		4,730,529
Commercial real estate | Current or less than 30 days past due
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss, by Origination Year [Abstract]
Total	4,825,768		4,713,127
Commercial real estate | 30 - 89 Days past due
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss, by Origination Year [Abstract]
Total	12,027		5,853
Commercial real estate | Non-owner occupied CRE
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss, by Origination Year [Abstract]
Current fiscal year	104,465		417,956
Fiscal year before current fiscal year	425,676		258,746
Two years before current fiscal year	288,661		270,672
Three years before current fiscal year	276,542		608,320
Four years before current fiscal year	610,447		431,346
Prior	1,515,918		1,129,297
Revolving loans amortized cost basis	45,299		33,932
Total	3,267,008		3,150,269
Gross write-offs for the year ended December 31, 2025
Current fiscal year	0		0
Fiscal year before current fiscal year	0		0
Two years before current fiscal year	0		0
Three years before current fiscal year	0		0
Four years before current fiscal year	0		0
Prior	0		816
Revolving loans amortized cost basis	0		0
Total	0	816	816
Commercial real estate | Non-owner occupied CRE | Current or less than 30 days past due
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss, by Origination Year [Abstract]
Total	3,249,170		3,137,206
Commercial real estate | Non-owner occupied CRE | 30 - 89 Days past due
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss, by Origination Year [Abstract]
Total	8,430		4,056
Commercial real estate | Non-owner occupied CRE | Pass
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss, by Origination Year [Abstract]
Current fiscal year	104,465		417,956
Fiscal year before current fiscal year	422,725		257,298
Two years before current fiscal year	287,221		270,435
Three years before current fiscal year	269,844		572,181
Four years before current fiscal year	560,914		421,783
Prior	1,434,450		1,063,545
Revolving loans amortized cost basis	44,740		33,545
Total	3,124,359		3,036,743
Commercial real estate | Non-owner occupied CRE | Watch
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss, by Origination Year [Abstract]
Current fiscal year	0		0
Fiscal year before current fiscal year	2,951		527
Two years before current fiscal year	524		237
Three years before current fiscal year	1,712		6,487
Four years before current fiscal year	19,493		0
Prior	56,022		49,660
Revolving loans amortized cost basis	559		387
Total	81,261		57,298
Commercial real estate | Non-owner occupied CRE | Substandard
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss, by Origination Year [Abstract]
Current fiscal year	0		0
Fiscal year before current fiscal year	0		921
Two years before current fiscal year	916		0
Three years before current fiscal year	4,986		23,488
Four years before current fiscal year	23,475		9,538
Prior	22,603		13,274
Revolving loans amortized cost basis	0		0
Total	51,980		47,221
Commercial real estate | Non-owner occupied CRE | Non-accrual
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss, by Origination Year [Abstract]
Current fiscal year	0		0
Fiscal year before current fiscal year	0		0
Two years before current fiscal year	0		0
Three years before current fiscal year	0		6,164
Four years before current fiscal year	6,565		25
Prior	2,843		2,818
Revolving loans amortized cost basis	0		0
Total	9,408		9,007
Commercial real estate | Owner occupied CRE
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss, by Origination Year [Abstract]
Current fiscal year	59,409		232,776
Fiscal year before current fiscal year	245,268		135,662
Two years before current fiscal year	132,781		118,510
Three years before current fiscal year	115,331		192,448
Four years before current fiscal year	186,367		242,217
Prior	728,091		543,898
Revolving loans amortized cost basis	116,214		114,749
Total	1,583,461		1,580,260
Gross write-offs for the year ended December 31, 2025
Current fiscal year	48		0
Fiscal year before current fiscal year	0		0
Two years before current fiscal year	0		0
Three years before current fiscal year	0		384
Four years before current fiscal year	0		0
Prior	55		0
Revolving loans amortized cost basis	0		0
Total	103	0	384
Commercial real estate | Owner occupied CRE | Current or less than 30 days past due
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss, by Origination Year [Abstract]
Total	1,576,598		1,575,921
Commercial real estate | Owner occupied CRE | 30 - 89 Days past due
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss, by Origination Year [Abstract]
Total	3,597		1,797
Commercial real estate | Owner occupied CRE | Pass
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss, by Origination Year [Abstract]
Current fiscal year	58,043		231,225
Fiscal year before current fiscal year	244,856		132,459
Two years before current fiscal year	129,615		110,736
Three years before current fiscal year	108,991		173,201
Four years before current fiscal year	168,594		235,419
Prior	700,161		517,212
Revolving loans amortized cost basis	113,689		111,649
Total	1,523,949		1,511,901
Commercial real estate | Owner occupied CRE | Watch
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss, by Origination Year [Abstract]
Current fiscal year	391		1,133
Fiscal year before current fiscal year	0		1,154
Two years before current fiscal year	1,136		4,080
Three years before current fiscal year	2,577		3,006
Four years before current fiscal year	2,863		5,634
Prior	16,830		16,519
Revolving loans amortized cost basis	979		1,229
Total	24,776		32,755
Commercial real estate | Owner occupied CRE | Substandard
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss, by Origination Year [Abstract]
Current fiscal year	975		418
Fiscal year before current fiscal year	412		2,050
Two years before current fiscal year	2,030		3,623
Three years before current fiscal year	3,623		15,059
Four years before current fiscal year	13,783		904
Prior	9,101		9,137
Revolving loans amortized cost basis	1,546		1,871
Total	31,470		33,062
Commercial real estate | Owner occupied CRE | Non-accrual
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss, by Origination Year [Abstract]
Current fiscal year	0		0
Fiscal year before current fiscal year	0		0
Two years before current fiscal year	0		72
Three years before current fiscal year	140		1,182
Four years before current fiscal year	1,127		259
Prior	1,999		1,029
Revolving loans amortized cost basis	0		0
Total	3,266		2,542
Residential real estate | Residential mortgage loans
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss, by Origination Year [Abstract]
Current fiscal year	261,883		913,162
Fiscal year before current fiscal year	886,747		548,959
Two years before current fiscal year	492,206		437,727
Three years before current fiscal year	404,839		532,878
Four years before current fiscal year	514,481		398,365
Prior	801,400		444,169
Revolving loans amortized cost basis	61,590		45,841
Total	3,423,146		3,321,101
Gross write-offs for the year ended December 31, 2025
Current fiscal year	83		263
Fiscal year before current fiscal year	0		30
Two years before current fiscal year	0		189
Three years before current fiscal year	0		158
Four years before current fiscal year	0		91
Prior	0		0
Revolving loans amortized cost basis	0		0
Total	83	169	731
Residential real estate | Residential mortgage loans | Current or less than 30 days past due
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss, by Origination Year [Abstract]
Total	3,380,559		3,283,403
Residential real estate | Residential mortgage loans | 30 - 89 Days past due
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss, by Origination Year [Abstract]
Total	18,047		12,943
Residential real estate | Residential mortgage loans | Non-accrual
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss, by Origination Year [Abstract]
Current fiscal year	0		510
Fiscal year before current fiscal year	508		4,328
Two years before current fiscal year	6,071		8,425
Three years before current fiscal year	8,338		3,002
Four years before current fiscal year	2,996		4,121
Prior	6,422		3,507
Revolving loans amortized cost basis	0		0
Total	24,335		23,893
Residential real estate | Residential mortgage loans | Accrual
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss, by Origination Year [Abstract]
Current fiscal year	261,883		912,652
Fiscal year before current fiscal year	886,239		544,631
Two years before current fiscal year	486,135		429,302
Three years before current fiscal year	396,501		529,876
Four years before current fiscal year	511,485		394,244
Prior	794,978		440,662
Revolving loans amortized cost basis	61,590		45,841
Total	3,398,811		3,297,208
Residential real estate | Home equity lines of credit
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss, by Origination Year [Abstract]
Current fiscal year	376		1,061
Fiscal year before current fiscal year	323		16
Two years before current fiscal year	411		598
Three years before current fiscal year	21		99
Four years before current fiscal year	97		249
Prior	2,882		2,707
Revolving loans amortized cost basis	418,627		406,115
Total	422,737		410,845
Gross write-offs for the year ended December 31, 2025
Current fiscal year	14		25
Fiscal year before current fiscal year	0		0
Two years before current fiscal year	0		0
Three years before current fiscal year	0		0
Four years before current fiscal year	0		0
Prior	0		0
Revolving loans amortized cost basis	0		39
Total	14	0	64
Residential real estate | Home equity lines of credit | Current or less than 30 days past due
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss, by Origination Year [Abstract]
Total	420,147		408,114
Residential real estate | Home equity lines of credit | 30 - 89 Days past due
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss, by Origination Year [Abstract]
Total	1,228		1,361
Residential real estate | Home equity lines of credit | Non-accrual
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss, by Origination Year [Abstract]
Current fiscal year	0		0
Fiscal year before current fiscal year	0		0
Two years before current fiscal year	0		0
Three years before current fiscal year	0		0
Four years before current fiscal year	0		0
Prior	0		0
Revolving loans amortized cost basis	1,237		1,203
Total	1,237		1,203
Residential real estate | Home equity lines of credit | Accrual
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss, by Origination Year [Abstract]
Current fiscal year	376		1,061
Fiscal year before current fiscal year	323		16
Two years before current fiscal year	411		598
Three years before current fiscal year	21		99
Four years before current fiscal year	97		249
Prior	2,882		2,707
Revolving loans amortized cost basis	417,390		404,912
Total	421,500		409,642
Consumer | Consumer credit card
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss, by Origination Year [Abstract]
Current fiscal year	0		0
Fiscal year before current fiscal year	0		0
Two years before current fiscal year	0		0
Three years before current fiscal year	0		0
Four years before current fiscal year	0		0
Prior	0		0
Revolving loans amortized cost basis	93,171		98,310
Total	93,171		98,310
Gross write-offs for the year ended December 31, 2025
Current fiscal year	0		0
Fiscal year before current fiscal year	0		0
Two years before current fiscal year	0		0
Three years before current fiscal year	0		0
Four years before current fiscal year	0		0
Prior	0		0
Revolving loans amortized cost basis	1,121		3,452
Total	1,121	834	3,452
Consumer | Consumer credit card | Current or less than 30 days past due
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss, by Origination Year [Abstract]
Current fiscal year	0		0
Fiscal year before current fiscal year	0		0
Two years before current fiscal year	0		0
Three years before current fiscal year	0		0
Four years before current fiscal year	0		0
Prior	0		0
Revolving loans amortized cost basis	91,960		96,988
Total	91,960		96,988
Consumer | Consumer credit card | 30 - 89 Days past due
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss, by Origination Year [Abstract]
Current fiscal year	0		0
Fiscal year before current fiscal year	0		0
Two years before current fiscal year	0		0
Three years before current fiscal year	0		0
Four years before current fiscal year	0		0
Prior	0		0
Revolving loans amortized cost basis	868		1,042
Total	868		1,042
Consumer | Consumer credit card | 90+days
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss, by Origination Year [Abstract]
Current fiscal year	0		0
Fiscal year before current fiscal year	0		0
Two years before current fiscal year	0		0
Three years before current fiscal year	0		0
Four years before current fiscal year	0		0
Prior	0		0
Revolving loans amortized cost basis	343		280
Total	343		280
Consumer | Other consumer loans
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss, by Origination Year [Abstract]
Current fiscal year	27,844		109,390
Fiscal year before current fiscal year	95,543		105,131
Two years before current fiscal year	91,895		112,157
Three years before current fiscal year	98,406		99,126
Four years before current fiscal year	84,412		48,309
Prior	73,300		38,054
Revolving loans amortized cost basis	27,619		39,228
Total	499,019		551,395
Gross write-offs for the year ended December 31, 2025
Current fiscal year	300		3,172
Fiscal year before current fiscal year	270		1,201
Two years before current fiscal year	232		2,004
Three years before current fiscal year	663		2,112
Four years before current fiscal year	575		1,285
Prior	293		1,212
Revolving loans amortized cost basis	0		0
Total	2,333	$ 3,022	10,986
Consumer | Other consumer loans | Current or less than 30 days past due
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss, by Origination Year [Abstract]
Current fiscal year	27,831		108,542
Fiscal year before current fiscal year	94,424		103,299
Two years before current fiscal year	90,614		109,084
Three years before current fiscal year	95,366		95,649
Four years before current fiscal year	81,292		46,525
Prior	71,156		36,933
Revolving loans amortized cost basis	27,619		39,228
Total	488,302		539,260
Consumer | Other consumer loans | 30 - 89 Days past due
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss, by Origination Year [Abstract]
Current fiscal year	13		647
Fiscal year before current fiscal year	823		1,573
Two years before current fiscal year	806		2,400
Three years before current fiscal year	2,265		2,872
Four years before current fiscal year	2,478		1,424
Prior	1,573		863
Revolving loans amortized cost basis	0		0
Total	7,958		9,779
Consumer | Other consumer loans | 90+days
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss, by Origination Year [Abstract]
Current fiscal year	0		0
Fiscal year before current fiscal year	0		0
Two years before current fiscal year	0		0
Three years before current fiscal year	0		0
Four years before current fiscal year	0		0
Prior	0		0
Revolving loans amortized cost basis	0		0
Total	0		0
Consumer | Other consumer loans | Non-accrual
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss, by Origination Year [Abstract]
Current fiscal year	0		201
Fiscal year before current fiscal year	296		259
Two years before current fiscal year	475		673
Three years before current fiscal year	775		605
Four years before current fiscal year	642		360
Prior	571		258
Revolving loans amortized cost basis	0		0
Total	$ 2,759		$ 2,356