Loans and Allowance for Credit Losses - Schedule of Risk Category of Loans by Class of Loans (Detail) - USD ($)
$ in Thousands |
Dec. 31, 2025 |
Dec. 31, 2024 |
| Commercial Real Estate [Member] |
|
|
| Financing Receivable Recorded Investment [Line Items] |
|
|
| Year 1 |
$ 433,998
|
$ 333,204
|
| Year 2 |
321,671
|
192,406
|
| Year 3 |
164,191
|
340,844
|
| Year 4 |
260,729
|
165,679
|
| Year 5 |
163,885
|
149,097
|
| Prior |
261,721
|
173,269
|
| Revolving Loans Amortized Cost |
619,154
|
475,160
|
| Revolving Loans Converted to Term |
999
|
855
|
| Total |
2,226,348
|
1,830,514
|
| Commercial Real Estate [Member] | Pass [Member] |
|
|
| Financing Receivable Recorded Investment [Line Items] |
|
|
| Year 1 |
429,259
|
332,078
|
| Year 2 |
319,227
|
191,947
|
| Year 3 |
162,815
|
337,048
|
| Year 4 |
256,817
|
162,180
|
| Year 5 |
162,737
|
148,732
|
| Prior |
258,510
|
166,614
|
| Revolving Loans Amortized Cost |
614,449
|
474,324
|
| Revolving Loans Converted to Term |
999
|
855
|
| Total |
2,204,813
|
1,813,778
|
| Commercial Real Estate [Member] | Special Mention [Member] |
|
|
| Financing Receivable Recorded Investment [Line Items] |
|
|
| Year 1 |
|
331
|
| Year 2 |
115
|
|
| Year 3 |
|
103
|
| Year 4 |
73
|
|
| Prior |
|
378
|
| Revolving Loans Amortized Cost |
667
|
497
|
| Total |
855
|
1,309
|
| Commercial Real Estate [Member] | Substandard [Member] |
|
|
| Financing Receivable Recorded Investment [Line Items] |
|
|
| Year 1 |
4,739
|
795
|
| Year 2 |
2,329
|
459
|
| Year 3 |
1,376
|
3,693
|
| Year 4 |
3,839
|
3,499
|
| Year 5 |
1,148
|
365
|
| Prior |
3,211
|
6,277
|
| Revolving Loans Amortized Cost |
4,038
|
339
|
| Total |
20,680
|
15,427
|
| Commercial and Industrial [Member] |
|
|
| Financing Receivable Recorded Investment [Line Items] |
|
|
| Year 1 |
193,223
|
122,798
|
| Year 2 |
137,203
|
86,524
|
| Year 3 |
68,191
|
69,769
|
| Year 4 |
49,555
|
32,519
|
| Year 5 |
34,029
|
54,232
|
| Prior |
27,461
|
19,441
|
| Revolving Loans Amortized Cost |
306,374
|
271,921
|
| Revolving Loans Converted to Term |
849
|
1,661
|
| Total |
816,885
|
658,865
|
| Commercial and Industrial [Member] | Pass [Member] |
|
|
| Financing Receivable Recorded Investment [Line Items] |
|
|
| Year 1 |
192,904
|
114,421
|
| Year 2 |
120,288
|
78,335
|
| Year 3 |
43,779
|
69,294
|
| Year 4 |
48,264
|
32,227
|
| Year 5 |
33,804
|
53,119
|
| Prior |
25,293
|
16,902
|
| Revolving Loans Amortized Cost |
304,608
|
261,227
|
| Revolving Loans Converted to Term |
849
|
994
|
| Total |
769,789
|
626,519
|
| Commercial and Industrial [Member] | Special Mention [Member] |
|
|
| Financing Receivable Recorded Investment [Line Items] |
|
|
| Year 1 |
|
121
|
| Year 2 |
93
|
|
| Year 3 |
16,865
|
160
|
| Year 4 |
147
|
18
|
| Year 5 |
10
|
|
| Prior |
336
|
870
|
| Revolving Loans Amortized Cost |
129
|
131
|
| Total |
17,580
|
1,300
|
| Commercial and Industrial [Member] | Substandard [Member] |
|
|
| Financing Receivable Recorded Investment [Line Items] |
|
|
| Year 1 |
319
|
8,256
|
| Year 2 |
16,822
|
8,189
|
| Year 3 |
7,547
|
315
|
| Year 4 |
1,144
|
274
|
| Year 5 |
215
|
1,113
|
| Prior |
1,832
|
1,592
|
| Revolving Loans Amortized Cost |
1,637
|
10,563
|
| Revolving Loans Converted to Term |
|
667
|
| Total |
29,516
|
30,969
|
| Commercial and Industrial [Member] | Doubtful [Member] |
|
|
| Financing Receivable Recorded Investment [Line Items] |
|
|
| Prior |
|
77
|
| Total |
|
77
|
| Residential Real Estate [Member] |
|
|
| Financing Receivable Recorded Investment [Line Items] |
|
|
| Year 1 |
49,106
|
25,981
|
| Year 2 |
17,695
|
34,128
|
| Year 3 |
31,938
|
35,940
|
| Year 4 |
37,071
|
260,583
|
| Year 5 |
242,795
|
7,745
|
| Prior |
124,453
|
133,912
|
| Revolving Loans Amortized Cost |
78,663
|
67,860
|
| Revolving Loans Converted to Term |
424
|
617
|
| Total |
582,145
|
566,766
|
| Residential Real Estate [Member] | Pass [Member] |
|
|
| Financing Receivable Recorded Investment [Line Items] |
|
|
| Year 1 |
49,089
|
25,981
|
| Year 2 |
17,591
|
33,933
|
| Year 3 |
30,673
|
35,687
|
| Year 4 |
36,518
|
260,180
|
| Year 5 |
242,578
|
7,622
|
| Prior |
121,963
|
130,242
|
| Revolving Loans Amortized Cost |
78,442
|
66,981
|
| Revolving Loans Converted to Term |
379
|
572
|
| Total |
577,233
|
561,198
|
| Residential Real Estate [Member] | Special Mention [Member] |
|
|
| Financing Receivable Recorded Investment [Line Items] |
|
|
| Prior |
277
|
300
|
| Revolving Loans Amortized Cost |
|
72
|
| Total |
277
|
372
|
| Residential Real Estate [Member] | Substandard [Member] |
|
|
| Financing Receivable Recorded Investment [Line Items] |
|
|
| Year 1 |
17
|
|
| Year 2 |
104
|
195
|
| Year 3 |
1,265
|
253
|
| Year 4 |
553
|
403
|
| Year 5 |
217
|
123
|
| Prior |
2,213
|
3,370
|
| Revolving Loans Amortized Cost |
221
|
807
|
| Revolving Loans Converted to Term |
45
|
45
|
| Total |
4,635
|
5,196
|
| Agricultural Real Estate [Member] |
|
|
| Financing Receivable Recorded Investment [Line Items] |
|
|
| Year 1 |
65,295
|
53,910
|
| Year 2 |
43,928
|
18,990
|
| Year 3 |
21,682
|
24,758
|
| Year 4 |
16,193
|
12,039
|
| Year 5 |
10,677
|
20,584
|
| Prior |
50,769
|
40,631
|
| Revolving Loans Amortized Cost |
70,113
|
96,059
|
| Revolving Loans Converted to Term |
270
|
277
|
| Total |
278,927
|
267,248
|
| Agricultural Real Estate [Member] | Pass [Member] |
|
|
| Financing Receivable Recorded Investment [Line Items] |
|
|
| Year 1 |
65,295
|
52,369
|
| Year 2 |
43,928
|
16,936
|
| Year 3 |
19,536
|
24,551
|
| Year 4 |
16,115
|
11,468
|
| Year 5 |
10,270
|
20,508
|
| Prior |
49,537
|
36,834
|
| Revolving Loans Amortized Cost |
70,113
|
95,410
|
| Revolving Loans Converted to Term |
270
|
277
|
| Total |
275,064
|
258,353
|
| Agricultural Real Estate [Member] | Special Mention [Member] |
|
|
| Financing Receivable Recorded Investment [Line Items] |
|
|
| Year 1 |
|
1,541
|
| Year 3 |
|
151
|
| Prior |
129
|
138
|
| Revolving Loans Amortized Cost |
|
595
|
| Total |
129
|
2,425
|
| Agricultural Real Estate [Member] | Substandard [Member] |
|
|
| Financing Receivable Recorded Investment [Line Items] |
|
|
| Year 2 |
|
2,054
|
| Year 3 |
2,146
|
56
|
| Year 4 |
78
|
571
|
| Year 5 |
407
|
76
|
| Prior |
1,103
|
3,659
|
| Revolving Loans Amortized Cost |
|
54
|
| Total |
3,734
|
6,470
|
| Agricultural [Member] |
|
|
| Financing Receivable Recorded Investment [Line Items] |
|
|
| Year 1 |
27,508
|
15,473
|
| Year 2 |
20,885
|
4,230
|
| Year 3 |
5,030
|
5,383
|
| Year 4 |
1,779
|
2,850
|
| Year 5 |
1,523
|
4,078
|
| Prior |
3,313
|
1,376
|
| Revolving Loans Amortized Cost |
128,213
|
53,900
|
| Revolving Loans Converted to Term |
224
|
49
|
| Total |
188,475
|
87,339
|
| Agricultural [Member] | Pass [Member] |
|
|
| Financing Receivable Recorded Investment [Line Items] |
|
|
| Year 1 |
27,452
|
15,428
|
| Year 2 |
20,798
|
4,045
|
| Year 3 |
4,886
|
5,364
|
| Year 4 |
1,649
|
2,576
|
| Year 5 |
1,506
|
3,674
|
| Prior |
2,618
|
1,308
|
| Revolving Loans Amortized Cost |
127,847
|
53,757
|
| Revolving Loans Converted to Term |
224
|
49
|
| Total |
186,980
|
86,201
|
| Agricultural [Member] | Special Mention [Member] |
|
|
| Financing Receivable Recorded Investment [Line Items] |
|
|
| Year 3 |
1
|
|
| Prior |
32
|
32
|
| Total |
33
|
32
|
| Agricultural [Member] | Substandard [Member] |
|
|
| Financing Receivable Recorded Investment [Line Items] |
|
|
| Year 1 |
56
|
45
|
| Year 2 |
87
|
185
|
| Year 3 |
143
|
19
|
| Year 4 |
130
|
274
|
| Year 5 |
17
|
404
|
| Prior |
663
|
36
|
| Revolving Loans Amortized Cost |
366
|
143
|
| Total |
1,462
|
1,106
|
| Consumer [Member] |
|
|
| Financing Receivable Recorded Investment [Line Items] |
|
|
| Year 1 |
37,847
|
35,425
|
| Year 2 |
8,950
|
17,737
|
| Year 3 |
10,149
|
14,446
|
| Year 4 |
7,436
|
5,935
|
| Year 5 |
3,445
|
2,775
|
| Prior |
3,529
|
2,759
|
| Revolving Loans Amortized Cost |
34,044
|
11,007
|
| Total |
105,400
|
90,084
|
| Consumer [Member] | Pass [Member] |
|
|
| Financing Receivable Recorded Investment [Line Items] |
|
|
| Year 1 |
37,830
|
35,412
|
| Year 2 |
8,889
|
17,503
|
| Year 3 |
9,933
|
14,157
|
| Year 4 |
7,213
|
5,765
|
| Year 5 |
3,326
|
2,732
|
| Prior |
3,485
|
2,724
|
| Revolving Loans Amortized Cost |
34,044
|
11,007
|
| Total |
104,720
|
89,300
|
| Consumer [Member] | Substandard [Member] |
|
|
| Financing Receivable Recorded Investment [Line Items] |
|
|
| Year 1 |
17
|
13
|
| Year 2 |
61
|
234
|
| Year 3 |
216
|
289
|
| Year 4 |
223
|
170
|
| Year 5 |
119
|
43
|
| Prior |
44
|
35
|
| Total |
680
|
784
|
| Total Loans Portfolio Segment [Member] |
|
|
| Financing Receivable Recorded Investment [Line Items] |
|
|
| Year 1 |
806,977
|
586,791
|
| Year 2 |
550,332
|
354,015
|
| Year 3 |
301,181
|
491,140
|
| Year 4 |
372,763
|
479,605
|
| Year 5 |
456,354
|
238,511
|
| Prior |
471,246
|
371,388
|
| Revolving Loans Amortized Cost |
1,236,561
|
975,907
|
| Revolving Loans Converted to Term |
2,766
|
3,459
|
| Total |
4,198,180
|
3,500,816
|
| Total Loans Portfolio Segment [Member] | Pass [Member] |
|
|
| Financing Receivable Recorded Investment [Line Items] |
|
|
| Year 1 |
801,829
|
575,689
|
| Year 2 |
530,721
|
342,699
|
| Year 3 |
271,622
|
486,101
|
| Year 4 |
366,576
|
474,396
|
| Year 5 |
454,221
|
236,387
|
| Prior |
461,406
|
354,624
|
| Revolving Loans Amortized Cost |
1,229,503
|
962,706
|
| Revolving Loans Converted to Term |
2,721
|
2,747
|
| Total |
4,118,599
|
3,435,349
|
| Total Loans Portfolio Segment [Member] | Special Mention [Member] |
|
|
| Financing Receivable Recorded Investment [Line Items] |
|
|
| Year 1 |
|
1,993
|
| Year 2 |
208
|
|
| Year 3 |
16,866
|
414
|
| Year 4 |
220
|
18
|
| Year 5 |
10
|
|
| Prior |
774
|
1,718
|
| Revolving Loans Amortized Cost |
796
|
1,295
|
| Total |
18,874
|
5,438
|
| Total Loans Portfolio Segment [Member] | Substandard [Member] |
|
|
| Financing Receivable Recorded Investment [Line Items] |
|
|
| Year 1 |
5,148
|
9,109
|
| Year 2 |
19,403
|
11,316
|
| Year 3 |
12,693
|
4,625
|
| Year 4 |
5,967
|
5,191
|
| Year 5 |
2,123
|
2,124
|
| Prior |
9,066
|
14,969
|
| Revolving Loans Amortized Cost |
6,262
|
11,906
|
| Revolving Loans Converted to Term |
45
|
712
|
| Total |
$ 60,707
|
59,952
|
| Total Loans Portfolio Segment [Member] | Doubtful [Member] |
|
|
| Financing Receivable Recorded Investment [Line Items] |
|
|
| Prior |
|
77
|
| Total |
|
$ 77
|