Loan Portfolio and Allowance for Credit Losses - Risk Category Loans by Class of Loans (Details) - USD ($)
$ in Thousands |
3 Months Ended |
12 Months Ended |
Mar. 31, 2026 |
Mar. 31, 2025 |
Dec. 31, 2025 |
| Commercial [Member] |
|
|
|
| Loan Portfolio and Allowance for Credit Losses [Abstract] |
|
|
|
| Total loans |
$ 316,763
|
|
$ 313,443
|
| Current-period Gross writeoffs |
19
|
$ 4
|
|
| Real Estate Mortgage - 1 to 4 Family [Member] |
|
|
|
| Loan Portfolio and Allowance for Credit Losses [Abstract] |
|
|
|
| Total loans |
4,962,798
|
|
4,927,461
|
| Current-period Gross writeoffs |
0
|
80
|
|
| Installment [Member] |
|
|
|
| Loan Portfolio and Allowance for Credit Losses [Abstract] |
|
|
|
| 2027/2026 |
423
|
|
3,089
|
| 2026/2025 |
2,965
|
|
1,973
|
| 2025/2024 |
1,668
|
|
3,195
|
| 2024/2023 |
2,700
|
|
1,588
|
| 2023/2022 |
1,328
|
|
257
|
| Prior |
634
|
|
562
|
| Revolving Loans Amortized Cost Basis |
899
|
|
892
|
| Revolving Loan Converted to Term |
0
|
|
0
|
| Total loans |
10,617
|
|
11,556
|
| 2027/2026 |
0
|
|
9
|
| 2026/2025 |
4
|
|
102
|
| 2025/2024 |
1
|
|
17
|
| 2024/2023 |
18
|
|
20
|
| 2023/2022 |
2
|
|
27
|
| Prior |
1
|
|
42
|
| Revolving Loans Amortized Cost Basis Writeoffs |
0
|
|
0
|
| Revolving Loan Converted to Term Writeoffs |
0
|
|
0
|
| Current-period Gross writeoffs |
26
|
$ 40
|
217
|
| Commercial Real Estate [Member] | Commercial [Member] |
|
|
|
| Loan Portfolio and Allowance for Credit Losses [Abstract] |
|
|
|
| 2027/2026 |
10,605
|
|
47,620
|
| 2026/2025 |
47,474
|
|
48,708
|
| 2025/2024 |
47,787
|
|
49,673
|
| 2024/2023 |
48,227
|
|
67,129
|
| 2023/2022 |
65,081
|
|
21,050
|
| Prior |
74,945
|
|
56,233
|
| Revolving Loans Amortized Cost Basis |
4,061
|
|
4,694
|
| Revolving Loan Converted to Term |
0
|
|
0
|
| Total loans |
298,180
|
|
295,107
|
| 2027/2026 |
0
|
|
0
|
| 2026/2025 |
0
|
|
0
|
| 2025/2024 |
0
|
|
0
|
| 2024/2023 |
0
|
|
0
|
| 2023/2022 |
19
|
|
4
|
| Prior |
0
|
|
0
|
| Revolving Loans Amortized Cost Basis Writeoffs |
0
|
|
0
|
| Revolving Loan Converted to Term Writeoffs |
0
|
|
0
|
| Current-period Gross writeoffs |
19
|
|
4
|
| Other [Member] | Commercial [Member] |
|
|
|
| Loan Portfolio and Allowance for Credit Losses [Abstract] |
|
|
|
| 2027/2026 |
1,334
|
|
4,453
|
| 2026/2025 |
4,251
|
|
1,332
|
| 2025/2024 |
1,201
|
|
6,346
|
| 2024/2023 |
6,149
|
|
1,228
|
| 2023/2022 |
1,170
|
|
137
|
| Prior |
467
|
|
1,218
|
| Revolving Loans Amortized Cost Basis |
4,011
|
|
3,622
|
| Revolving Loan Converted to Term |
0
|
|
0
|
| Total loans |
18,583
|
|
18,336
|
| 2027/2026 |
0
|
|
0
|
| 2026/2025 |
0
|
|
0
|
| 2025/2024 |
0
|
|
0
|
| 2024/2023 |
0
|
|
0
|
| 2023/2022 |
0
|
|
0
|
| Prior |
0
|
|
0
|
| Revolving Loans Amortized Cost Basis Writeoffs |
0
|
|
0
|
| Revolving Loan Converted to Term Writeoffs |
0
|
|
0
|
| Current-period Gross writeoffs |
0
|
|
0
|
| First Mortgages [Member] | Real Estate Mortgage - 1 to 4 Family [Member] |
|
|
|
| Loan Portfolio and Allowance for Credit Losses [Abstract] |
|
|
|
| 2027/2026 |
110,099
|
|
382,926
|
| 2026/2025 |
388,811
|
|
308,123
|
| 2025/2024 |
297,778
|
|
367,683
|
| 2024/2023 |
361,536
|
|
501,014
|
| 2023/2022 |
495,141
|
|
759,470
|
| Prior |
2,777,576
|
|
2,078,355
|
| Revolving Loans Amortized Cost Basis |
1,784
|
|
1,653
|
| Revolving Loan Converted to Term |
0
|
|
0
|
| Total loans |
4,432,725
|
|
4,399,224
|
| 2027/2026 |
0
|
|
0
|
| 2026/2025 |
0
|
|
0
|
| 2025/2024 |
0
|
|
0
|
| 2024/2023 |
0
|
|
0
|
| 2023/2022 |
0
|
|
0
|
| Prior |
0
|
|
99
|
| Revolving Loans Amortized Cost Basis Writeoffs |
0
|
|
0
|
| Revolving Loan Converted to Term Writeoffs |
0
|
|
0
|
| Current-period Gross writeoffs |
0
|
|
99
|
| Home Equity Loans [Member] | Real Estate Mortgage - 1 to 4 Family [Member] |
|
|
|
| Loan Portfolio and Allowance for Credit Losses [Abstract] |
|
|
|
| 2027/2026 |
3,858
|
|
17,600
|
| 2026/2025 |
17,251
|
|
5,386
|
| 2025/2024 |
5,001
|
|
7,138
|
| 2024/2023 |
6,645
|
|
4,450
|
| 2023/2022 |
4,166
|
|
5,328
|
| Prior |
28,265
|
|
24,134
|
| Revolving Loans Amortized Cost Basis |
0
|
|
0
|
| Revolving Loan Converted to Term |
0
|
|
0
|
| Total loans |
65,186
|
|
64,036
|
| 2027/2026 |
0
|
|
0
|
| 2026/2025 |
0
|
|
0
|
| 2025/2024 |
0
|
|
0
|
| 2024/2023 |
0
|
|
0
|
| 2023/2022 |
0
|
|
0
|
| Prior |
0
|
|
0
|
| Revolving Loans Amortized Cost Basis Writeoffs |
0
|
|
0
|
| Revolving Loan Converted to Term Writeoffs |
0
|
|
0
|
| Current-period Gross writeoffs |
0
|
|
0
|
| Home Equity Line of Credit [Member] | Real Estate Mortgage - 1 to 4 Family [Member] |
|
|
|
| Loan Portfolio and Allowance for Credit Losses [Abstract] |
|
|
|
| 2027/2026 |
594
|
|
1,718
|
| 2026/2025 |
2,345
|
|
3,985
|
| 2025/2024 |
3,139
|
|
1,471
|
| 2024/2023 |
1,275
|
|
1,196
|
| 2023/2022 |
1,337
|
|
1,504
|
| Prior |
25,159
|
|
21,024
|
| Revolving Loans Amortized Cost Basis |
431,038
|
|
433,303
|
| Revolving Loan Converted to Term |
0
|
|
0
|
| Total loans |
464,887
|
|
464,201
|
| 2027/2026 |
0
|
|
0
|
| 2026/2025 |
0
|
|
0
|
| 2025/2024 |
0
|
|
0
|
| 2024/2023 |
0
|
|
0
|
| 2023/2022 |
0
|
|
0
|
| Prior |
0
|
|
0
|
| Revolving Loans Amortized Cost Basis Writeoffs |
0
|
|
0
|
| Revolving Loan Converted to Term Writeoffs |
0
|
|
0
|
| Current-period Gross writeoffs |
0
|
|
0
|
| Performing [Member] | Installment [Member] |
|
|
|
| Loan Portfolio and Allowance for Credit Losses [Abstract] |
|
|
|
| 2027/2026 |
423
|
|
3,089
|
| 2026/2025 |
2,942
|
|
1,973
|
| 2025/2024 |
1,668
|
|
3,191
|
| 2024/2023 |
2,700
|
|
1,542
|
| 2023/2022 |
1,290
|
|
257
|
| Prior |
633
|
|
561
|
| Revolving Loans Amortized Cost Basis |
898
|
|
892
|
| Revolving Loan Converted to Term |
0
|
|
0
|
| Total loans |
10,554
|
|
11,505
|
| Performing [Member] | First Mortgages [Member] | Real Estate Mortgage - 1 to 4 Family [Member] |
|
|
|
| Loan Portfolio and Allowance for Credit Losses [Abstract] |
|
|
|
| 2027/2026 |
110,099
|
|
382,926
|
| 2026/2025 |
388,811
|
|
307,952
|
| 2025/2024 |
297,056
|
|
366,470
|
| 2024/2023 |
359,822
|
|
499,812
|
| 2023/2022 |
493,884
|
|
757,834
|
| Prior |
2,764,516
|
|
2,066,631
|
| Revolving Loans Amortized Cost Basis |
1,784
|
|
1,653
|
| Revolving Loan Converted to Term |
0
|
|
0
|
| Total loans |
4,415,972
|
|
4,383,278
|
| Performing [Member] | Home Equity Loans [Member] | Real Estate Mortgage - 1 to 4 Family [Member] |
|
|
|
| Loan Portfolio and Allowance for Credit Losses [Abstract] |
|
|
|
| 2027/2026 |
3,858
|
|
17,600
|
| 2026/2025 |
17,251
|
|
5,386
|
| 2025/2024 |
5,001
|
|
7,138
|
| 2024/2023 |
6,645
|
|
4,384
|
| 2023/2022 |
4,100
|
|
5,328
|
| Prior |
27,921
|
|
23,770
|
| Revolving Loans Amortized Cost Basis |
0
|
|
0
|
| Revolving Loan Converted to Term |
0
|
|
0
|
| Total loans |
64,776
|
|
63,606
|
| Performing [Member] | Home Equity Line of Credit [Member] | Real Estate Mortgage - 1 to 4 Family [Member] |
|
|
|
| Loan Portfolio and Allowance for Credit Losses [Abstract] |
|
|
|
| 2027/2026 |
594
|
|
1,718
|
| 2026/2025 |
2,345
|
|
3,985
|
| 2025/2024 |
3,045
|
|
1,471
|
| 2024/2023 |
1,146
|
|
1,196
|
| 2023/2022 |
1,337
|
|
1,504
|
| Prior |
23,383
|
|
19,145
|
| Revolving Loans Amortized Cost Basis |
430,766
|
|
432,926
|
| Revolving Loan Converted to Term |
0
|
|
0
|
| Total loans |
462,616
|
|
461,945
|
| Nonperforming [Member] | Installment [Member] |
|
|
|
| Loan Portfolio and Allowance for Credit Losses [Abstract] |
|
|
|
| 2027/2026 |
0
|
|
0
|
| 2026/2025 |
23
|
|
0
|
| 2025/2024 |
0
|
|
4
|
| 2024/2023 |
0
|
|
46
|
| 2023/2022 |
38
|
|
0
|
| Prior |
1
|
|
1
|
| Revolving Loans Amortized Cost Basis |
1
|
|
0
|
| Revolving Loan Converted to Term |
0
|
|
0
|
| Total loans |
63
|
|
51
|
| Nonperforming [Member] | First Mortgages [Member] | Real Estate Mortgage - 1 to 4 Family [Member] |
|
|
|
| Loan Portfolio and Allowance for Credit Losses [Abstract] |
|
|
|
| 2027/2026 |
0
|
|
0
|
| 2026/2025 |
0
|
|
171
|
| 2025/2024 |
722
|
|
1,213
|
| 2024/2023 |
1,714
|
|
1,202
|
| 2023/2022 |
1,257
|
|
1,636
|
| Prior |
13,060
|
|
11,724
|
| Revolving Loans Amortized Cost Basis |
0
|
|
0
|
| Revolving Loan Converted to Term |
0
|
|
0
|
| Total loans |
16,753
|
|
15,946
|
| Nonperforming [Member] | Home Equity Loans [Member] | Real Estate Mortgage - 1 to 4 Family [Member] |
|
|
|
| Loan Portfolio and Allowance for Credit Losses [Abstract] |
|
|
|
| 2027/2026 |
0
|
|
0
|
| 2026/2025 |
0
|
|
0
|
| 2025/2024 |
0
|
|
0
|
| 2024/2023 |
0
|
|
66
|
| 2023/2022 |
66
|
|
0
|
| Prior |
344
|
|
364
|
| Revolving Loans Amortized Cost Basis |
0
|
|
0
|
| Revolving Loan Converted to Term |
0
|
|
0
|
| Total loans |
410
|
|
430
|
| Nonperforming [Member] | Home Equity Line of Credit [Member] | Real Estate Mortgage - 1 to 4 Family [Member] |
|
|
|
| Loan Portfolio and Allowance for Credit Losses [Abstract] |
|
|
|
| 2027/2026 |
0
|
|
0
|
| 2026/2025 |
0
|
|
0
|
| 2025/2024 |
94
|
|
0
|
| 2024/2023 |
129
|
|
0
|
| 2023/2022 |
0
|
|
0
|
| Prior |
1,776
|
|
1,879
|
| Revolving Loans Amortized Cost Basis |
272
|
|
377
|
| Revolving Loan Converted to Term |
0
|
|
0
|
| Total loans |
2,271
|
|
2,256
|
| Pass [Member] | Commercial Real Estate [Member] | Commercial [Member] |
|
|
|
| Loan Portfolio and Allowance for Credit Losses [Abstract] |
|
|
|
| 2027/2026 |
10,605
|
|
47,620
|
| 2026/2025 |
47,474
|
|
47,818
|
| 2025/2024 |
46,897
|
|
49,673
|
| 2024/2023 |
48,227
|
|
65,902
|
| 2023/2022 |
63,528
|
|
21,050
|
| Prior |
74,273
|
|
55,543
|
| Revolving Loans Amortized Cost Basis |
4,061
|
|
4,694
|
| Revolving Loan Converted to Term |
0
|
|
0
|
| Total loans |
295,065
|
|
292,300
|
| Pass [Member] | Other [Member] | Commercial [Member] |
|
|
|
| Loan Portfolio and Allowance for Credit Losses [Abstract] |
|
|
|
| 2027/2026 |
1,334
|
|
4,453
|
| 2026/2025 |
4,251
|
|
1,322
|
| 2025/2024 |
1,192
|
|
6,346
|
| 2024/2023 |
6,104
|
|
1,228
|
| 2023/2022 |
1,170
|
|
136
|
| Prior |
467
|
|
1,218
|
| Revolving Loans Amortized Cost Basis |
3,971
|
|
3,538
|
| Revolving Loan Converted to Term |
0
|
|
0
|
| Total loans |
18,489
|
|
18,241
|
| Special Mention [Member] | Commercial Real Estate [Member] | Commercial [Member] |
|
|
|
| Loan Portfolio and Allowance for Credit Losses [Abstract] |
|
|
|
| 2027/2026 |
0
|
|
0
|
| 2026/2025 |
0
|
|
0
|
| 2025/2024 |
0
|
|
0
|
| 2024/2023 |
0
|
|
237
|
| 2023/2022 |
584
|
|
0
|
| Prior |
0
|
|
0
|
| Revolving Loans Amortized Cost Basis |
0
|
|
0
|
| Revolving Loan Converted to Term |
0
|
|
0
|
| Total loans |
584
|
|
237
|
| Special Mention [Member] | Other [Member] | Commercial [Member] |
|
|
|
| Loan Portfolio and Allowance for Credit Losses [Abstract] |
|
|
|
| 2027/2026 |
0
|
|
0
|
| 2026/2025 |
0
|
|
0
|
| 2025/2024 |
0
|
|
0
|
| 2024/2023 |
45
|
|
0
|
| 2023/2022 |
0
|
|
0
|
| Prior |
0
|
|
0
|
| Revolving Loans Amortized Cost Basis |
0
|
|
45
|
| Revolving Loan Converted to Term |
0
|
|
0
|
| Total loans |
45
|
|
45
|
| Substandard [Member] | Commercial Real Estate [Member] | Commercial [Member] |
|
|
|
| Loan Portfolio and Allowance for Credit Losses [Abstract] |
|
|
|
| 2027/2026 |
0
|
|
0
|
| 2026/2025 |
0
|
|
890
|
| 2025/2024 |
890
|
|
0
|
| 2024/2023 |
0
|
|
990
|
| 2023/2022 |
969
|
|
0
|
| Prior |
672
|
|
690
|
| Revolving Loans Amortized Cost Basis |
0
|
|
0
|
| Revolving Loan Converted to Term |
0
|
|
0
|
| Total loans |
2,531
|
|
2,570
|
| Substandard [Member] | Other [Member] | Commercial [Member] |
|
|
|
| Loan Portfolio and Allowance for Credit Losses [Abstract] |
|
|
|
| 2027/2026 |
0
|
|
0
|
| 2026/2025 |
0
|
|
10
|
| 2025/2024 |
9
|
|
0
|
| 2024/2023 |
0
|
|
0
|
| 2023/2022 |
0
|
|
1
|
| Prior |
0
|
|
0
|
| Revolving Loans Amortized Cost Basis |
40
|
|
39
|
| Revolving Loan Converted to Term |
0
|
|
0
|
| Total loans |
49
|
|
50
|
| Doubtful [Member] | Commercial Real Estate [Member] | Commercial [Member] |
|
|
|
| Loan Portfolio and Allowance for Credit Losses [Abstract] |
|
|
|
| 2027/2026 |
0
|
|
0
|
| 2026/2025 |
0
|
|
0
|
| 2025/2024 |
0
|
|
0
|
| 2024/2023 |
0
|
|
0
|
| 2023/2022 |
0
|
|
0
|
| Prior |
0
|
|
0
|
| Revolving Loans Amortized Cost Basis |
0
|
|
0
|
| Revolving Loan Converted to Term |
0
|
|
0
|
| Total loans |
0
|
|
0
|
| Doubtful [Member] | Other [Member] | Commercial [Member] |
|
|
|
| Loan Portfolio and Allowance for Credit Losses [Abstract] |
|
|
|
| 2027/2026 |
0
|
|
0
|
| 2026/2025 |
0
|
|
0
|
| 2025/2024 |
0
|
|
0
|
| 2024/2023 |
0
|
|
0
|
| 2023/2022 |
0
|
|
0
|
| Prior |
0
|
|
0
|
| Revolving Loans Amortized Cost Basis |
0
|
|
0
|
| Revolving Loan Converted to Term |
0
|
|
0
|
| Total loans |
$ 0
|
|
$ 0
|