Loans - Risk Categories of Loans by Class of Loans (Details) - USD ($) $ in Thousands	3 Months Ended		12 Months Ended
	Mar. 31, 2025	Mar. 31, 2024	Dec. 31, 2024
Financing Receivable, Credit Quality Indicator [Line Items]
Current fiscal year	$ 336,443		$ 1,312,924
One year prior to current fiscal year	1,387,355		907,011
Two years prior to current fiscal year	890,157		2,056,529
Three years prior to current fiscal year	2,004,751		1,792,005
Four years prior to current fiscal year	1,751,569		687,367
Prior	2,914,254		2,403,812
Revolving	1,158,492		1,140,302
Total	10,443,021		10,299,950
Current fiscal year, Charge Offs	165		789
One year prior to current fiscal year, Charge Offs	61		457
Two years prior to current fiscal year, Charge Offs	7		8,412
Three years prior to current fiscal year, Charge Offs	1,313		15,497
Four years prior to current fiscal year, Charge Offs	790		384
Prior, Charge Offs	5,536		4,953
Revolving, Charge Offs	405		1,373
Total, Charge Offs	8,277	$ 4,628	31,865
Construction and land development
Financing Receivable, Credit Quality Indicator [Line Items]
Current fiscal year	7,367		113,993
One year prior to current fiscal year	143,531		160,801
Two years prior to current fiscal year	171,693		161,305
Three years prior to current fiscal year	96,433		39,366
Four years prior to current fiscal year	39,147		8,547
Prior	47,530		37,382
Revolving	112,792		126,659
Total	618,493		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	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	0		1
Revolving, Charge Offs	0		0
Total, Charge Offs	0	0	1
Construction and land development | Pass
Financing Receivable, Credit Quality Indicator [Line Items]
Current fiscal year	7,367		113,993
One year prior to current fiscal year	143,531		160,801
Two years prior to current fiscal year	165,481		161,122
Three years prior to current fiscal year	96,279		39,276
Four years prior to current fiscal year	39,060		8,547
Prior	45,935		36,342
Revolving	112,792		126,659
Total	610,445		646,740
Construction and land development | Special Mention
Financing Receivable, Credit Quality Indicator [Line Items]
Current fiscal year	0		0
One year prior to current fiscal year	0		0
Two years prior to current fiscal year	6,212		0
Three years prior to current fiscal year	0		0
Four years prior to current fiscal year	0		0
Prior	658		75
Revolving	0		0
Total	6,870		75
Construction and land development | Substandard
Financing Receivable, Credit Quality Indicator [Line Items]
Current fiscal year	0		0
One year prior to current fiscal year	0		0
Two years prior to current fiscal year	0		183
Three years prior to current fiscal year	154		90
Four years prior to current fiscal year	87		0
Prior	937		965
Revolving	0		0
Total	1,178		1,238
Construction and land development | Doubtful
Financing Receivable, Credit Quality Indicator [Line Items]
Current fiscal year	0		0
One year prior to current fiscal year	0		0
Two years prior to current fiscal year	0		0
Three years prior to current fiscal year	0		0
Four years prior to current fiscal year	0		0
Prior	0		0
Revolving	0		0
Total	0		0
Commercial real estate - owner occupied
Financing Receivable, Credit Quality Indicator [Line Items]
Current fiscal year	51,751		184,401
One year prior to current fiscal year	182,977		140,258
Two years prior to current fiscal year	156,501		268,062
Three years prior to current fiscal year	261,941		260,432
Four years prior to current fiscal year	252,031		161,990
Prior	790,973		650,462
Revolving	17,405		21,024
Total	1,713,579		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	0		0
Four years prior to current fiscal year, Charge Offs	0		0
Prior, Charge Offs	0		162
Revolving, Charge Offs	0		0
Total, Charge Offs	0	0	341
Commercial real estate - owner occupied | Pass
Financing Receivable, Credit Quality Indicator [Line Items]
Current fiscal year	51,751		184,312
One year prior to current fiscal year	182,890		139,197
Two years prior to current fiscal year	142,750		260,266
Three years prior to current fiscal year	256,132		257,711
Four years prior to current fiscal year	250,906		153,702
Prior	752,667		628,391
Revolving	17,004		20,674
Total	1,654,100		1,644,253
Commercial real estate - owner occupied | Special Mention
Financing Receivable, Credit Quality Indicator [Line Items]
Current fiscal year	0		0
One year prior to current fiscal year	0		0
Two years prior to current fiscal year	12,696		4,975
Three years prior to current fiscal year	82		2,344
Four years prior to current fiscal year	751		2,418
Prior	19,030		7,965
Revolving	0		1
Total	32,559		17,703
Commercial real estate - owner occupied | Substandard
Financing Receivable, Credit Quality Indicator [Line Items]
Current fiscal year	0		89
One year prior to current fiscal year	87		1,061
Two years prior to current fiscal year	1,055		2,821
Three years prior to current fiscal year	5,727		377
Four years prior to current fiscal year	374		5,870
Prior	19,276		14,106
Revolving	401		349
Total	26,920		24,673
Commercial real estate - owner occupied | Doubtful
Financing Receivable, Credit Quality Indicator [Line Items]
Current fiscal year	0		0
One year prior to current fiscal year	0		0
Two years prior to current fiscal year	0		0
Three years prior to current fiscal year	0		0
Four years prior to current fiscal year	0		0
Prior	0		0
Revolving	0		0
Total	0		0
Commercial real estate - non-owner occupied
Financing Receivable, Credit Quality Indicator [Line Items]
Current fiscal year	63,479		495,388
One year prior to current fiscal year	493,204		236,306
Two years prior to current fiscal year	215,272		835,974
Three years prior to current fiscal year	875,752		593,845
Four years prior to current fiscal year	588,774		259,479
Prior	1,256,842		1,058,064
Revolving	20,077		24,752
Total	3,513,400		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
Total, Charge Offs	320	84	1,485
Commercial real estate - non-owner occupied | Pass
Financing Receivable, Credit Quality Indicator [Line Items]
Current fiscal year	63,479		495,361
One year prior to current fiscal year	493,178		236,306
Two years prior to current fiscal year	212,315		820,739
Three years prior to current fiscal year	845,590		581,892
Four years prior to current fiscal year	563,482		237,777
Prior	1,203,624		1,012,209
Revolving	20,077		24,752
Total	3,401,745		3,409,036
Commercial real estate - non-owner occupied | Special Mention
Financing Receivable, Credit Quality Indicator [Line Items]
Current fiscal year	0		27
One year prior to current fiscal year	26		0
Two years prior to current fiscal year	2,957		4,773
Three years prior to current fiscal year	616		1,269
Four years prior to current fiscal year	7,234		5,265
Prior	18,214		25,245
Revolving	0		0
Total	29,047		36,579
Commercial real estate - non-owner occupied | Substandard
Financing Receivable, Credit Quality Indicator [Line Items]
Current fiscal year	0		0
One year prior to current fiscal year	0		0
Two years prior to current fiscal year	0		10,462
Three years prior to current fiscal year	29,546		10,684
Four years prior to current fiscal year	17,847		16,437
Prior	35,004		20,610
Revolving	0		0
Total	82,397		58,193
Commercial real estate - non-owner occupied | Doubtful
Financing Receivable, Credit Quality Indicator [Line Items]
Current fiscal year	0		0
One year prior to current fiscal year	0		0
Two years prior to current fiscal year	0		0
Three years prior to current fiscal year	0		0
Four years prior to current fiscal year	211		0
Prior	0		0
Revolving	0		0
Total	211		0
Residential real estate
Financing Receivable, Credit Quality Indicator [Line Items]
Current fiscal year	48,840		130,871
One year prior to current fiscal year	179,161		174,647
Two years prior to current fiscal year	173,161		497,480
Three years prior to current fiscal year	497,407		632,525
Four years prior to current fiscal year	623,882		153,891
Prior	588,733		497,361
Revolving	541,828		530,010
Total	2,653,012		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	0		0
Four years prior to current fiscal year, Charge Offs	0		40
Prior, Charge Offs	1		62
Revolving, Charge Offs	0		32
Total, Charge Offs	1	0	134
Residential real estate | Pass
Financing Receivable, Credit Quality Indicator [Line Items]
Current fiscal year	48,840		130,178
One year prior to current fiscal year	178,525		173,606
Two years prior to current fiscal year	171,920		492,412
Three years prior to current fiscal year	492,408		631,313
Four years prior to current fiscal year	621,781		153,786
Prior	584,241		490,156
Revolving	533,777		517,136
Total	2,631,492		2,588,587
Residential real estate | Special Mention
Financing Receivable, Credit Quality Indicator [Line Items]
Current fiscal year	0		0
One year prior to current fiscal year	0		22
Two years prior to current fiscal year	17		0
Three years prior to current fiscal year	0		0
Four years prior to current fiscal year	704		0
Prior	296		164
Revolving	1,904		3,434
Total	2,921		3,620
Residential real estate | Substandard
Financing Receivable, Credit Quality Indicator [Line Items]
Current fiscal year	0		693
One year prior to current fiscal year	636		1,019
Two years prior to current fiscal year	1,224		5,068
Three years prior to current fiscal year	4,999		1,212
Four years prior to current fiscal year	1,397		105
Prior	4,196		7,041
Revolving	6,147		9,440
Total	18,599		24,578
Residential real estate | Doubtful
Financing Receivable, Credit Quality Indicator [Line Items]
Current fiscal year	0		0
One year prior to current fiscal year	0		0
Two years prior to current fiscal year	0		0
Three years prior to current fiscal year	0		0
Four years prior to current fiscal year	0		0
Prior	0		0
Revolving	0		0
Total	0		0
Commercial and financial
Financing Receivable, Credit Quality Indicator [Line Items]
Current fiscal year	161,208		373,569
One year prior to current fiscal year	373,240		180,920
Two years prior to current fiscal year	161,073		262,422
Three years prior to current fiscal year	245,228		245,076
Four years prior to current fiscal year	229,025		89,343
Prior	189,324		129,784
Revolving	393,992		370,240
Total	1,753,090		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	0		2,762
Three years prior to current fiscal year, Charge Offs	153		10,669
Four years prior to current fiscal year, Charge Offs	747		0
Prior, Charge Offs	5,187		3,111
Revolving, Charge Offs	382		1,074
Total, Charge Offs	6,469	2,656	17,616
Commercial and financial | Pass
Financing Receivable, Credit Quality Indicator [Line Items]
Current fiscal year	161,208		373,569
One year prior to current fiscal year	373,240		180,423
Two years prior to current fiscal year	160,168		253,120
Three years prior to current fiscal year	237,004		232,427
Four years prior to current fiscal year	213,537		82,964
Prior	175,905		117,276
Revolving	385,449		362,701
Total	1,706,511		1,602,480
Commercial and financial | Special Mention
Financing Receivable, Credit Quality Indicator [Line Items]
Current fiscal year	0		0
One year prior to current fiscal year	0		382
Two years prior to current fiscal year	797		755
Three years prior to current fiscal year	952		2,839
Four years prior to current fiscal year	7,257		232
Prior	1,867		1,904
Revolving	4,268		2,163
Total	15,141		8,275
Commercial and financial | Substandard
Financing Receivable, Credit Quality Indicator [Line Items]
Current fiscal year	0		0
One year prior to current fiscal year	0		115
Two years prior to current fiscal year	108		8,547
Three years prior to current fiscal year	7,272		9,810
Four years prior to current fiscal year	8,231		6,147
Prior	11,552		10,604
Revolving	3,377		5,376
Total	30,540		40,599
Commercial and financial | Doubtful
Financing Receivable, Credit Quality Indicator [Line Items]
Current fiscal year	0		0
One year prior to current fiscal year	0		0
Two years prior to current fiscal year	0		0
Three years prior to current fiscal year	0		0
Four years prior to current fiscal year	0		0
Prior	0		0
Revolving	898		0
Total	898		0
Consumer
Financing Receivable, Credit Quality Indicator [Line Items]
Current fiscal year	3,798		14,702
One year prior to current fiscal year	15,242		14,079
Two years prior to current fiscal year	12,457		31,286
Three years prior to current fiscal year	27,990		20,761
Four years prior to current fiscal year	18,710		14,117
Prior	40,852		30,759
Revolving	72,398		67,617
Total	191,447		193,321
Current fiscal year, Charge Offs	165		789
One year prior to current fiscal year, Charge Offs	61		457
Two years prior to current fiscal year, Charge Offs	7		5,471
Three years prior to current fiscal year, Charge Offs	1,160		4,828
Four years prior to current fiscal year, Charge Offs	43		255
Prior, Charge Offs	28		221
Revolving, Charge Offs	23		267
Total, Charge Offs	1,487	$ 1,888	12,288
Consumer | Pass
Financing Receivable, Credit Quality Indicator [Line Items]
Current fiscal year	3,798		14,627
One year prior to current fiscal year	15,217		14,049
Two years prior to current fiscal year	12,444		26,332
Three years prior to current fiscal year	24,567		20,721
Four years prior to current fiscal year	18,705		11,682
Prior	40,239		30,022
Revolving	72,330		67,562
Total	187,300		184,995
Consumer | Special Mention
Financing Receivable, Credit Quality Indicator [Line Items]
Current fiscal year	0		0
One year prior to current fiscal year			5
Two years prior to current fiscal year	0		1
Three years prior to current fiscal year	0		0
Four years prior to current fiscal year	0		0
Prior	0		0
Revolving	48		54
Total	48		60
Consumer | Substandard
Financing Receivable, Credit Quality Indicator [Line Items]
Current fiscal year	0		75
One year prior to current fiscal year	25		25
Two years prior to current fiscal year	13		4,953
Three years prior to current fiscal year	3,423		40
Four years prior to current fiscal year	5		2,435
Prior	613		737
Revolving	20		1
Total	4,099		8,266
Consumer | Doubtful
Financing Receivable, Credit Quality Indicator [Line Items]
Current fiscal year	0		0
One year prior to current fiscal year	0		0
Two years prior to current fiscal year	0		0
Three years prior to current fiscal year	0		0
Four years prior to current fiscal year	0		0
Prior	0		0
Revolving	0		0
Total	$ 0		$ 0