Loans and ACL - Summary of Recorded Investment of Loans Held for Investment by Internal Loan Grade by Year of Origination Quarterly (Detail) - USD ($) $ in Thousands	6 Months Ended
Jun. 30, 2025	Dec. 31, 2024
Financing Receivable, Credit Quality Indicator [Line Items]
2025	$ 40,151	$ 58,252
2024	42,809	181,865
2023	167,509	740,853
2022	671,662	323,241
2021	301,900	260,534
Prior	557,718	340,307
Revolving Loans	195,989	205,703
Total	1,977,738	2,110,755
Current period gross charge-offs	5,882
Current period gross charge-offs 2025	71
Current period gross charge-offs 2024	716
Current period gross charge-offs 2023	148
Current period gross charge-offs 2022	4,566
Current period gross charge-offs 2021	28
Current period gross charge-offs prior	196
Current period gross charge-offs revolving	157
Commercial and Industrial [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
2025	5,779	15,499
2024	10,712	40,237
2023	38,738	107,206
2022	92,753	35,345
2021	30,315	23,150
Prior	33,716	17,987
Revolving Loans	111,963	115,480
Total	323,976	354,904
Current period gross charge-offs	4,661
Current period gross charge-offs 2024	369
Current period gross charge-offs 2023	30
Current period gross charge-offs 2022	4,103
Current period gross charge-offs prior	109
Current period gross charge-offs revolving	50
Construction, Commercial [Member] \| Real Estate [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
2025	1,673	6,219
2024	6,608	7,483
2023	3,837	65,560
2022	43,841	15,367
2021	5,424	10,175
Prior	17,037	9,288
Revolving Loans	56	399
Total	78,476	114,491
Construction, Residential [Member] \| Real Estate [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
2025	15,366	19,767
2024	11,275	9,030
2023	1,183	7,992
2022	4,048	13,971
2021	19,423
Prior	53	57
Revolving Loans	683	990
Total	52,031	51,807
Commercial [Member] \| Real Estate [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
2025	10,255	6,847
2024	6,685	39,790
2023	38,225	320,210
2022	299,639	137,196
2021	131,999	159,760
Prior	301,563	158,507
Revolving Loans	22,612	25,532
Total	810,978	847,842
Current period gross charge-offs	63
Current period gross charge-offs prior	63
Residential [Member] \| Real Estate [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
2025	4,937	3,668
2024	2,661	67,516
2023	71,354	229,615
2022	222,948	118,090
2021	112,166	66,320
Prior	202,538	151,202
Revolving Loans	54,713	55,842
Total	671,317	692,253
Current period gross charge-offs	123
Current period gross charge-offs prior	16
Current period gross charge-offs revolving	107
Farmland [Member] \| Real Estate [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
2025	63	147
2024	145	135
2023	129	997
2022	993	1,339
2021	1,308
Prior	1,938	2,753
Revolving Loans	147	149
Total	4,723	5,520
Consumer [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
2025	2,078	6,105
2024	4,723	17,674
2023	14,043	9,273
2022	7,440	1,933
2021	1,265	1,129
Prior	873	513
Revolving Loans	5,815	7,311
Total	36,237	43,938
Current period gross charge-offs	1,035
Current period gross charge-offs 2025	71
Current period gross charge-offs 2024	347
Current period gross charge-offs 2023	118
Current period gross charge-offs 2022	463
Current period gross charge-offs 2021	28
Current period gross charge-offs prior	8
Risk Grades 1 - 4
Financing Receivable, Credit Quality Indicator [Line Items]
2025	38,463	53,329
2024	39,406	147,386
2023	134,068	618,362
2022	513,220	272,353
2021	239,311	230,603
Prior	479,855	300,706
Revolving Loans	178,155	182,509
Total	1,622,478	1,805,248
Risk Grades 1 - 4 \| Commercial and Industrial [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
2025	5,579	13,883
2024	10,041	13,559
2023	11,821	64,530
2022	50,243	14,600
2021	11,492	17,405
Prior	26,355	15,760
Revolving Loans	99,294	98,867
Total	214,825	238,604
Risk Grades 1 - 4 \| Construction, Commercial [Member] \| Real Estate [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
2025	1,504	6,219
2024	6,608	6,277
2023	2,641	65,560
2022	43,841	7,776
2021	4,709	5,405
Prior	6,813	4,792
Revolving Loans	56	399
Total	66,172	96,428
Risk Grades 1 - 4 \| Construction, Residential [Member] \| Real Estate [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
2025	14,826	19,574
2024	11,275	8,861
2023	1,183	7,837
2022	394	13,971
Prior	53	57
Revolving Loans	683	990
Total	28,414	51,290
Risk Grades 1 - 4 \| Commercial [Member] \| Real Estate [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
2025	10,255	4,747
2024	4,603	34,698
2023	34,844	245,563
2022	190,611	118,435
2021	112,137	142,211
Prior	252,503	133,856
Revolving Loans	18,229	21,323
Total	623,182	700,833
Risk Grades 1 - 4 \| Residential [Member] \| Real Estate [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
2025	4,221	2,815
2024	2,205	66,780
2023	69,989	225,159
2022	220,306	114,682
2021	108,735	64,548
Prior	191,408	143,002
Revolving Loans	53,931	53,498
Total	650,795	670,484
Risk Grades 1 - 4 \| Farmland [Member] \| Real Estate [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
2025		147
2024	145
2023		997
2022	993	1,239
2021	1,212
Prior	1,938	2,753
Revolving Loans	147	149
Total	4,435	5,285
Risk Grades 1 - 4 \| Consumer [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
2025	2,078	5,944
2024	4,529	17,211
2023	13,590	8,716
2022	6,832	1,650
2021	1,026	1,034
Prior	785	486
Revolving Loans	5,815	7,283
Total	34,655	42,324
Risk Grades 5 - 6
Financing Receivable, Credit Quality Indicator [Line Items]
2025	1,547	2,327
2024	1,466	30,880
2023	28,828	104,708
2022	122,807	26,264
2021	35,569	24,907
Prior	67,767	30,699
Revolving Loans	15,332	19,371
Total	273,316	239,156
Risk Grades 5 - 6 \| Commercial and Industrial [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
2025	200	672
2024	368	24,430
2023	23,881	37,503
2022	36,538	10,201
2021	5,792	5,183
Prior	5,512	979
Revolving Loans	10,722	15,092
Total	83,013	94,060
Risk Grades 5 - 6 \| Construction, Commercial [Member] \| Real Estate [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
2025	169
2024		1,090
2023	1,082
2022		7,567
2021	700	4,770
Prior	10,224	4,235
Total	12,175	17,662
Risk Grades 5 - 6 \| Construction, Residential [Member] \| Real Estate [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
2025	540	193
2022	3,187
2021	19,423
Total	23,150	193
Risk Grades 5 - 6 \| Commercial [Member] \| Real Estate [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
2025		535
2024	522	5,092
2023	3,381	64,677
2022	82,100	7,002
2021	8,494	14,604
Prior	47,189	23,104
Revolving Loans	4,383	4,184
Total	146,069	119,198
Risk Grades 5 - 6 \| Residential [Member] \| Real Estate [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
2025	575	853
2024	456
2023	165	2,303
2022	739	1,295
2021	974	318
Prior	4,810	2,378
Revolving Loans	227	95
Total	7,946	7,242
Risk Grades 5 - 6 \| Farmland [Member] \| Real Estate [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
2025	63
2024		135
2023	129
2022		100
2021	96
Total	288	235
Risk Grades 5 - 6 \| Consumer [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
2025		74
2024	120	133
2023	190	225
2022	243	99
2021	90	32
Prior	32	3
Total	675	566
Risk Grade 7
Financing Receivable, Credit Quality Indicator [Line Items]
2025	141	2,596
2024	1,937	3,599
2023	4,613	17,783
2022	35,635	23,163
2021	25,614	5,024
Prior	10,095	8,709
Revolving Loans	2,501	3,823
Total	80,536	64,697
Risk Grade 7 \| Commercial and Industrial [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
2025		944
2024	303	2,248
2023	3,036	5,173
2022	5,972	10,462
2021	12,964	562
Prior	1,849	1,247
Revolving Loans	1,947	1,521
Total	26,071	22,157
Risk Grade 7 \| Construction, Commercial [Member] \| Real Estate [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
2024		116
2023	114
2022		24
2021	15
Prior		261
Total	129	401
Risk Grade 7 \| Construction, Residential [Member] \| Real Estate [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
2024		169
2023		155
2022	467
Total	467	324
Risk Grade 7 \| Commercial [Member] \| Real Estate [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
2025		1,565
2024	1,560
2023		9,970
2022	26,928	10,380
2021	10,029	2,945
Prior	1,871	1,355
Revolving Loans		25
Total	40,388	26,240
Risk Grade 7 \| Residential [Member] \| Real Estate [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
2025	141
2024		736
2023	1,200	2,153
2022	1,903	2,113
2021	2,457	1,454
Prior	6,319	5,822
Revolving Loans	554	2,249
Total	12,574	14,527
Risk Grade 7 \| Consumer [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
2025		87
2024	74	330
2023	263	332
2022	365	184
2021	149	63
Prior	56	24
Revolving Loans		28
Total	907	1,048
Risk Grade 8
Financing Receivable, Credit Quality Indicator [Line Items]
2022		1,461
2021	1,406
Prior	1	193
Revolving Loans	1
Total	1,408	1,654
Risk Grade 8 \| Commercial and Industrial [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
2022		82
2021	67
Prior		1
Total	67	83
Risk Grade 8 \| Commercial [Member] \| Real Estate [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
2022		1,379
2021	1,339
Prior		192
Total	1,339	$ 1,571
Risk Grade 8 \| Residential [Member] \| Real Estate [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Prior	1
Revolving Loans	1
Total	$ 2

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