Loans and Allowance for Credit Losses - Summary of Recorded Investment of Loans Held for Investment by Internal Loan Grade by Year of Origination (Detail) - USD ($) $ in Thousands	12 Months Ended
Dec. 31, 2025	Dec. 31, 2024
Financing Receivable, Credit Quality Indicator [Line Items]
2025	$ 154,101	$ 58,252
2024	35,382	181,865
2023	127,272	740,853
2022	614,904	323,241
2021	279,689	260,534
Prior	478,302	340,307
Revolving Loans	174,862	205,703
Total	1,864,512	2,110,755
Current period gross charge-offs	12,140
Current period gross charge-offs 2025	220
Current period gross charge-offs 2024	436
Current period gross charge-offs 2023	700
Current period gross charge-offs 2022	913
Current period gross charge-offs 2021	645
Current period gross charge-offs prior	329
Current period gross charge-offs revolving	8,897
Commercial and Industrial [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
2025	21,157	15,499
2024	10,607	40,237
2023	12,086	107,206
2022	73,044	35,345
2021	31,587	23,150
Prior	26,681	17,987
Revolving Loans	95,996	115,480
Total	271,158	354,904
Current period gross charge-offs	9,385
Current period gross charge-offs 2024	346
Current period gross charge-offs 2023	369
Current period gross charge-offs 2022	730
Current period gross charge-offs 2021	32
Current period gross charge-offs prior	199
Current period gross charge-offs revolving	7,709
Construction, Commercial [Member] \| Real Estate [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
2025	22,804	6,219
2024	5,186	7,483
2023	2,099	65,560
2022	4,044	15,367
2021	3,821	10,175
Prior	13,722	9,288
Revolving Loans	62	399
Total	51,738	114,491
Construction, Residential [Member] \| Real Estate [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
2025	22,947	19,767
2024	5,258	9,030
2023	495	7,992
2022	2,931	13,971
2021	93
Prior	48	57
Revolving Loans		990
Total	31,772	51,807
Commercial [Member] \| Real Estate [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
2025	76,730	6,847
2024	6,055	39,790
2023	34,800	320,210
2022	318,787	137,196
2021	135,169	159,760
Prior	243,933	158,507
Revolving Loans	20,834	25,532
Total	836,308	847,842
Current period gross charge-offs	611
Current period gross charge-offs 2022	20
Current period gross charge-offs 2021	540
Current period gross charge-offs prior	71
Residential [Member] \| Real Estate [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
2025	5,781	3,668
2024	3,536	67,516
2023	66,808	229,615
2022	209,515	118,090
2021	106,962	66,320
Prior	191,630	151,202
Revolving Loans	52,511	55,842
Total	636,743	692,253
Current period gross charge-offs	234
Current period gross charge-offs 2023	64
Current period gross charge-offs prior	43
Current period gross charge-offs revolving	107
Farmland [Member] \| Real Estate [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
2025	62	147
2024	142	135
2023	123	997
2022	987	1,339
2021	1,279
Prior	1,821	2,753
Revolving Loans	166	149
Total	4,580	5,520
Consumer [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
2025	4,620	6,105
2024	4,598	17,674
2023	10,861	9,273
2022	5,596	1,933
2021	778	1,129
Prior	467	513
Revolving Loans	5,293	7,311
Total	32,213	43,938
Current period gross charge-offs	1,910
Current period gross charge-offs 2025	220
Current period gross charge-offs 2024	90
Current period gross charge-offs 2023	267
Current period gross charge-offs 2022	163
Current period gross charge-offs 2021	73
Current period gross charge-offs prior	16
Current period gross charge-offs revolving	1,081
Risk Grades 1 - 4
Financing Receivable, Credit Quality Indicator [Line Items]
2025	150,053	53,329
2024	31,347	147,386
2023	118,176	618,362
2022	472,357	272,353
2021	226,966	230,603
Prior	398,339	300,706
Revolving Loans	165,986	182,509
Total	1,563,224	1,805,248
Risk Grades 1 - 4 \| Commercial and Industrial [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
2025	20,395	13,883
2024	9,213	13,559
2023	9,941	64,530
2022	47,850	14,600
2021	16,375	17,405
Prior	20,845	15,760
Revolving Loans	91,849	98,867
Total	216,468	238,604
Risk Grades 1 - 4 \| Construction, Commercial [Member] \| Real Estate [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
2025	22,147	6,219
2024	5,186	6,277
2023	2,099	65,560
2022	4,001	7,776
2021	3,139	5,405
Prior	3,417	4,792
Revolving Loans	62	399
Total	40,051	96,428
Risk Grades 1 - 4 \| Construction, Residential [Member] \| Real Estate [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
2025	22,609	19,574
2024	5,258	8,861
2023	495	7,837
2022	75	13,971
2021	93
Prior	48	57
Revolving Loans		990
Total	28,578	51,290
Risk Grades 1 - 4 \| Commercial [Member] \| Real Estate [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
2025	75,900	4,747
2024	4,500	34,698
2023	29,768	245,563
2022	209,573	118,435
2021	101,178	142,211
Prior	190,435	133,856
Revolving Loans	17,057	21,323
Total	628,411	700,833
Risk Grades 1 - 4 \| Residential [Member] \| Real Estate [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
2025	4,382	2,815
2024	2,705	66,780
2023	65,443	225,159
2022	204,911	114,682
2021	104,375	64,548
Prior	181,362	143,002
Revolving Loans	51,559	53,498
Total	614,737	670,484
Risk Grades 1 - 4 \| Farmland [Member] \| Real Estate [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
2025		147
2024	142
2023		997
2022	987	1,239
2021	1,186
Prior	1,821	2,753
Revolving Loans	166	149
Total	4,302	5,285
Risk Grades 1 - 4 \| Consumer [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
2025	4,620	5,944
2024	4,343	17,211
2023	10,430	8,716
2022	4,960	1,650
2021	620	1,034
Prior	411	486
Revolving Loans	5,293	7,283
Total	30,677	42,324
Risk Grades 5 - 6
Financing Receivable, Credit Quality Indicator [Line Items]
2025	3,487	2,327
2024	1,377	30,880
2023	6,868	104,708
2022	103,785	26,264
2021	36,487	24,907
Prior	66,794	30,699
Revolving Loans	6,640	19,371
Total	225,438	239,156
Risk Grades 5 - 6 \| Commercial and Industrial [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
2025	762	672
2024	408	24,430
2023	1,257	37,503
2022	20,110	10,201
2021	2,817	5,183
Prior	3,944	979
Revolving Loans	2,465	15,092
Total	31,763	94,060
Risk Grades 5 - 6 \| Construction, Commercial [Member] \| Real Estate [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
2025	657
2024		1,090
2022	43	7,567
2021	677	4,770
Prior	10,094	4,235
Total	11,471	17,662
Risk Grades 5 - 6 \| Construction, Residential [Member] \| Real Estate [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
2025	338	193
2022	2,544
Total	2,882	193
Risk Grades 5 - 6 \| Commercial [Member] \| Real Estate [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
2025	830	535
2024		5,092
2023	5,032	64,677
2022	79,834	7,002
2021	31,472	14,604
Prior	47,824	23,104
Revolving Loans	3,777	4,184
Total	168,769	119,198
Risk Grades 5 - 6 \| Residential [Member] \| Real Estate [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
2025	838	853
2024	831
2023	266	2,303
2022	928	1,295
2021	1,380	318
Prior	4,914	2,378
Revolving Loans	398	95
Total	9,555	7,242
Risk Grades 5 - 6 \| Farmland [Member] \| Real Estate [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
2025	62
2024		135
2023	123
2022		100
2021	93
Total	278	235
Risk Grades 5 - 6 \| Consumer [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
2025		74
2024	138	133
2023	190	225
2022	326	99
2021	48	32
Prior	18	3
Total	720	566
Risk Grade 7
Financing Receivable, Credit Quality Indicator [Line Items]
2025	561	2,596
2024	2,658	3,599
2023	2,228	17,783
2022	38,762	23,163
2021	16,236	5,024
Prior	12,779	8,709
Revolving Loans	2,236	3,823
Total	75,460	64,697
Risk Grade 7 \| Commercial and Industrial [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
2025		944
2024	986	2,248
2023	888	5,173
2022	5,084	10,462
2021	12,395	562
Prior	1,502	1,247
Revolving Loans	1,682	1,521
Total	22,537	22,157
Risk Grade 7 \| Construction, Commercial [Member] \| Real Estate [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
2024		116
2022		24
2021	5
Prior	211	261
Total	216	401
Risk Grade 7 \| Construction, Residential [Member] \| Real Estate [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
2024		169
2023		155
2022	312
Total	312	324
Risk Grade 7 \| Commercial [Member] \| Real Estate [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
2025		1,565
2024	1,555
2023		9,970
2022	29,380	10,380
2021	2,519	2,945
Prior	5,674	1,355
Revolving Loans		25
Total	39,128	26,240
Risk Grade 7 \| Residential [Member] \| Real Estate [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
2025	561
2024		736
2023	1,099	2,153
2022	3,676	2,113
2021	1,207	1,454
Prior	5,354	5,822
Revolving Loans	554	2,249
Total	12,451	14,527
Risk Grade 7 \| Consumer [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
2025		87
2024	117	330
2023	241	332
2022	310	184
2021	110	63
Prior	38	24
Revolving Loans		28
Total	816	1,048
Risk Grade 8
Financing Receivable, Credit Quality Indicator [Line Items]
2022		1,461
Prior	390	193
Total	390	1,654
Risk Grade 8 \| Commercial and Industrial [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
2022		82
Prior	390	1
Total	$ 390	83
Risk Grade 8 \| Commercial [Member] \| Real Estate [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
2022		1,379
Prior		192
Total		$ 1,571

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