| Financing Receivables [Text Block] |
Loans:
Loan balances were as follows:
| (In Thousands of Dollars) | | March 31, 2026 | | | December 31, 2025 | |
| Commercial real estate | | | | | | | | |
| Owner occupied | | $ | 626,711 | | | $ | 393,061 | |
| Non-owner occupied | | | 1,047,722 | | | | 710,468 | |
| Farmland | | | 231,601 | | | | 211,370 | |
| Other | | | 403,988 | | | | 294,587 | |
| Commercial | | | | | | | | |
| Commercial and industrial | | | 591,409 | | | | 340,224 | |
| Agricultural | | | 52,414 | | | | 54,195 | |
| Residential real estate | | | | | | | | |
| 1-4 family residential | | | 1,219,766 | | | | 850,300 | |
| Home equity lines of credit | | | 349,656 | | | | 181,544 | |
| Consumer | | | | | | | | |
| Indirect | | | 233,576 | | | | 231,242 | |
| Direct | | | 21,539 | | | | 16,483 | |
| Other | | | 10,020 | | | | 10,070 | |
| Total loans | | $ | 4,788,402 | | | $ | 3,293,544 | |
| Net deferred loan costs | | | 11,662 | | | | 11,169 | |
| Allowance for credit losses | | | (54,684 | ) | | | (36,811 | ) |
| Net loans | | $ | 4,745,380 | | | $ | 3,267,902 | |
Allowance for credit loss activity
The following tables present the activity in the allowance for credit losses by portfolio segment for the three month periods ended March 31, 2026 and 2025:
Three Months Ended March 31, 2026
| | | Commercial | | | | | | | Residential | | | | | | | | | |
| (In Thousands of Dollars) | | Real Estate | | | Commercial | | | Real Estate | | | Consumer | | | Total | |
| Allowance for credit losses | | | | | | | | | | | | | | | | | | | | |
| Beginning balance | | $ | 20,064 | | | $ | 4,536 | | | $ | 7,241 | | | $ | 4,970 | | | $ | 36,811 | |
| (Credit) Provision for credit losses | | | (1,771 | ) | | | 329 | | | | 13 | | | | 416 | | | | (1,013 | ) |
| Initial allowance on loans purchased with credit deterioration | | | 3,380 | | | | 600 | | | | 15 | | | | 0 | | | | 3,995 | |
| Initial allowance on purchased seasoned loans | | | 8,377 | | | | 2,746 | | | | 4,102 | | | | 110 | | | | 15,335 | |
| Loans charged off | | | (1 | ) | | | (291 | ) | | | (83 | ) | | | (354 | ) | | | (729 | ) |
| Recoveries | | | 0 | | | | 121 | | | | 43 | | | | 121 | | | | 285 | |
| Total ending allowance balance | | $ | 30,049 | | | $ | 8,041 | | | $ | 11,331 | | | $ | 5,263 | | | $ | 54,684 | |
Three Months Ended March 31, 2025
| | | Commercial | | | | | | | Residential | | | | | | | | | |
| (In Thousands of Dollars) | | Real Estate | | | Commercial | | | Real Estate | | | Consumer | | | Total | |
| Allowance for credit losses | | | | | | | | | | | | | | | | | | | | |
| Beginning balance | | $ | 19,259 | | | $ | 4,628 | | | $ | 7,271 | | | $ | 4,705 | | | $ | 35,863 | |
| Provision (Credit) for credit losses | | | 263 | | | | (125 | ) | | | (234 | ) | | | 118 | | | | 22 | |
| Loans charged off | | | (44 | ) | | | (313 | ) | | | (19 | ) | | | (322 | ) | | | (698 | ) |
| Recoveries | | | 2 | | | | 193 | | | | 47 | | | | 120 | | | | 362 | |
| Total ending allowance balance | | $ | 19,480 | | | $ | 4,383 | | | $ | 7,065 | | | $ | 4,621 | | | $ | 35,549 | |
The cumulative loss rate used as the basis for the estimate of credit losses is comprised of the Company's historical loss experience from December 31, 2011 to March 31, 2026. As of March 31, 2026, the Company expects that the markets in which it operates will experience minimal changes to economic conditions, stable trend in unemployment rate, and an increased trend of delinquencies. Management adjusted historical loss experience for these expectations. No reversion adjustments were necessary, as the starting point for the Company's estimate was a cumulative loss rate covering the expected contractual term of the portfolio. While there are many factors that go into the calculation of the allowance for credit losses, the change in the balances from March 31, 2025 to March 31, 2026 is largely attributed to the Middlefield Merger.
The following tables present the amortized cost basis of loans on nonaccrual status and loans past due over 89 days still accruing as of March 31, 2026 and December 31, 2025:
| | | Nonaccrual with | | | Nonaccrual with | | | Loans past due | |
| | | no allowance | | | an allowance | | | over 89 days | |
| (In Thousands of Dollars) | | for credit loss | | | for credit loss | | | still accruing | |
| March 31, 2026 | | | | | | | | | | | | |
| Commercial real estate | | | | | | | | | | | | |
| Owner occupied | | $ | 4,989 | | | $ | 2,818 | | | $ | 0 | |
| Non-owner occupied | | | 6,773 | | | | 16,680 | | | | 0 | |
| Farmland | | | 0 | | | | 1,879 | | | | 0 | |
| Other | | | 1,576 | | | | 0 | | | | 0 | |
| Commercial | | | | | | | | | | | | |
| Commercial and industrial | | | 8,074 | | | | 9,521 | | | | 0 | |
| Agricultural | | | 0 | | | | 161 | | | | 0 | |
| Residential real estate | | | | | | | | | | | | |
| 1-4 family residential | | | 1,878 | | | | 3,068 | | | | 268 | |
| Home equity lines of credit | | | 506 | | | | 1,004 | | | | 0 | |
| Consumer | | | | | | | | | | | | |
| Indirect | | | 32 | | | | 526 | | | | 0 | |
| Direct | | | 0 | | | | 4 | | | | 0 | |
| Other | | | 97 | | | | 0 | | | | 0 | |
| Total loans | | $ | 23,925 | | | $ | 35,661 | | | $ | 268 | |
| | | Nonaccrual with | | | Nonaccrual with | | | Loans past due | |
| | | no allowance | | | an allowance | | | over 89 days | |
| (In Thousands of Dollars) | | for credit loss | | | for credit loss | | | still accruing | |
| December 31, 2025 | | | | | | | | | | | | |
| Commercial real estate | | | | | | | | | | | | |
| Owner occupied | | $ | 1,346 | | | $ | 207 | | | $ | 0 | |
| Non-owner occupied | | | 2,408 | | | | 10,776 | | | | 0 | |
| Farmland | | | 0 | | | | 1,917 | | | | 0 | |
| Other | | | 1,093 | | | | 0 | | | | 0 | |
| Commercial | | | | | | | | | | | | |
| Commercial and industrial | | | 0 | | | | 2,778 | | | | 82 | |
| Agricultural | | | 0 | | | | 159 | | | | 0 | |
| Residential real estate | | | | | | | | | | | | |
| 1-4 family residential | | | 1,095 | | | | 2,329 | | | | 271 | |
| Home equity lines of credit | | | 424 | | | | 689 | | | | 0 | |
| Consumer | | | | | | | | | | | | |
| Indirect | | | 61 | | | | 462 | | | | 0 | |
| Direct | | | 0 | | | | 21 | | | | 0 | |
| Other | | | 97 | | | | 0 | | | | 0 | |
| Total loans | | $ | 6,524 | | | $ | 19,338 | | | $ | 353 | |
There were no loans that were held for sale and in nonaccrual status for the periods ending March 31, 2026 and December 31, 2025.
The following tables present the amortized cost basis of collateral-dependent loans by class of loans as of March 31, 2026 and December 31, 2025:
| (In Thousands of Dollars) | | Real Estate | | | Business Assets | | | Vehicles | | | Cash | |
| March 31, 2026 | | | | | | | | | | | | | | | | |
| Commercial real estate | | | | | | | | | | | | | | | | |
| Owner occupied | | $ | 7,518 | | | $ | 0 | | | $ | 0 | | | $ | 0 | |
| Non-owner occupied | | | 35,322 | | | | 0 | | | | 0 | | | | 0 | |
| Farmland | | | 1,839 | | | | 0 | | | | 0 | | | | 0 | |
| Other | | | 1,576 | | | | 0 | | | | 0 | | | | 0 | |
| Commercial | | | | | | | | | | | | | | | | |
| Commercial and industrial | | | 0 | | | | 16,812 | | | | 0 | | | | 0 | |
| Agricultural | | | 0 | | | | 8 | | | | 0 | | | | 0 | |
| Residential real estate | | | | | | | | | | | | | | | | |
| 1-4 family residential | | | 3,031 | | | | 0 | | | | 0 | | | | 0 | |
| Home equity lines of credit | | | 912 | | | | 0 | | | | 0 | | | | 0 | |
| Consumer | | | | | | | | | | | | | | | | |
| Indirect | | | 0 | | | | 0 | | | | 72 | | | | 0 | |
| Direct | | | 0 | | | | 0 | | | | 2 | | | | 0 | |
| Other | | | 97 | | | | 0 | | | | 0 | | | | 0 | |
| Total loans | | $ | 50,295 | | | $ | 16,820 | | | $ | 74 | | | $ | 0 | |
| (In Thousands of Dollars) | | Real Estate | | | Business Assets | | | Vehicles | | | Cash | |
| December 31, 2025 | | | | | | | | | | | | | | | | |
| Commercial real estate | | | | | | | | | | | | | | | | |
| Owner occupied | | $ | 1,346 | | | $ | 0 | | | $ | 0 | | | $ | 0 | |
| Non-owner occupied | | | 24,235 | | | | 0 | | | | 0 | | | | 0 | |
| Farmland | | | 1,872 | | | | 0 | | | | 0 | | | | 0 | |
| Other | | | 1,093 | | | | 0 | | | | 0 | | | | 0 | |
| Commercial | | | | | | | | | | | | | | | | |
| Commercial and industrial | | | 0 | | | | 2,352 | | | | 0 | | | | 0 | |
| Agricultural | | | 0 | | | | 0 | | | | 0 | | | | 0 | |
| Residential real estate | | | | | | | | | | | | | | | | |
| 1-4 family residential | | | 2,411 | | | | 0 | | | | 0 | | | | 0 | |
| Home equity lines of credit | | | 944 | | | | 0 | | | | 0 | | | | 0 | |
| Consumer | | | | | | | | | | | | | | | | |
| Indirect | | | 0 | | | | 0 | | | | 102 | | | | 0 | |
| Direct | | | 0 | | | | 0 | | | | 4 | | | | 0 | |
| Other | | | 97 | | | | 0 | | | | 0 | | | | 0 | |
| Total loans | | $ | 31,998 | | | $ | 2,352 | | | $ | 106 | | | $ | 0 | |
The following tables present the aging of the amortized cost basis in past due loans as of March 31, 2026 and December 31, 2025 by class of loans.
| | | | | | | | | | | 90 Days | | | | | | | | | | | | | |
| | | | | | | | | | | or More | | | | | | | | | | | | | |
| | | 30-59 Days | | | 60-89 Days | | | Past Due | | | Total | | | Loans Not | | | | | |
| (In Thousands of Dollars) | | Past Due | | | Past Due | | | and Nonaccrual | | | Past Due | | | Past Due | | | Total | |
| March 31, 2026 | | | | | | | | | | | | | | | | | | | | | | | | |
| Commercial real estate | | | | | | | | | | | | | | | | | | | | | | | | |
| Owner occupied | | $ | 376 | | | $ | 0 | | | $ | 7,807 | | | $ | 8,183 | | | $ | 618,356 | | | $ | 626,539 | |
| Non-owner occupied | | | 106 | | | | 0 | | | | 23,453 | | | | 23,559 | | | | 1,023,809 | | | | 1,047,368 | |
| Farmland | | | 112 | | | | 160 | | | | 1,879 | | | | 2,151 | | | | 229,304 | | | | 231,455 | |
| Other | | | 990 | | | | 0 | | | | 1,576 | | | | 2,566 | | | | 400,802 | | | | 403,368 | |
| Commercial | | | | | | | | | | | | | | | | | | | | | | | | |
| Commercial and industrial | | | 641 | | | | 390 | | | | 17,595 | | | | 18,626 | | | | 574,331 | | | | 592,957 | |
| Agricultural | | | 239 | | | | 25 | | | | 161 | | | | 425 | | | | 52,879 | | | | 53,304 | |
| Residential real estate | | | | | | | | | | | | | | | | | | | | | | | | |
| 1-4 family residential | | | 8,634 | | | | 59 | | | | 5,214 | | | | 13,907 | | | | 1,206,809 | | | | 1,220,716 | |
| Home equity lines of credit | | | 695 | | | | 227 | | | | 1,510 | | | | 2,432 | | | | 347,486 | | | | 349,918 | |
| Consumer | | | | | | | | | | | | | | | | | | | | | | | | |
| Indirect | | | 1,372 | | | | 513 | | | | 558 | | | | 2,443 | | | | 240,360 | | | | 242,803 | |
| Direct | | | 99 | | | | 30 | | | | 4 | | | | 133 | | | | 21,479 | | | | 21,612 | |
| Other | | | 32 | | | | 0 | | | | 97 | | | | 129 | | | | 9,895 | | | | 10,024 | |
| Total loans | | $ | 13,296 | | | $ | 1,404 | | | $ | 59,854 | | | $ | 74,554 | | | $ | 4,725,510 | | | $ | 4,800,064 | |
| | | | | | | | | | | 90 Days | | | | | | | | | | | | | |
| | | | | | | | | | | or More | | | | | | | | | | | | | |
| | | 30-59 Days | | | 60-89 Days | | | Past Due | | | Total | | | Loans Not | | | | | |
| (In Thousands of Dollars) | | Past Due | | | Past Due | | | and Nonaccrual | | | Past Due | | | Past Due | | | Total | |
| December 31, 2025 | | | | | | | | | | | | | | | | | | | | | | | | |
| Commercial real estate | | | | | | | | | | | | | | | | | | | | | | | | |
| Owner occupied | | $ | 419 | | | $ | 1,018 | | | $ | 1,553 | | | $ | 2,990 | | | $ | 389,881 | | | $ | 392,871 | |
| Non-owner occupied | | | 8 | | | | 0 | | | | 13,184 | | | | 13,192 | | | | 696,884 | | | | 710,076 | |
| Farmland | | | 116 | | | | 163 | | | | 1,917 | | | | 2,196 | | | | 209,035 | | | | 211,231 | |
| Other | | | 0 | | | | 0 | | | | 1,093 | | | | 1,093 | | | | 292,915 | | | | 294,008 | |
| Commercial | | | | | | | | | | | | | | | | | | | | | | | | |
| Commercial and industrial | | | 1,064 | | | | 174 | | | | 2,860 | | | | 4,098 | | | | 337,639 | | | | 341,737 | |
| Agricultural | | | 235 | | | | 30 | | | | 159 | | | | 424 | | | | 54,665 | | | | 55,089 | |
| Residential real estate | | | | | | | | | | | | | | | | | | | | | | | | |
| 1-4 family residential | | | 9,848 | | | | 1,122 | | | | 3,695 | | | | 14,665 | | | | 836,515 | | | | 851,180 | |
| Home equity lines of credit | | | 75 | | | | 54 | | | | 1,113 | | | | 1,242 | | | | 180,544 | | | | 181,786 | |
| Consumer | | | | | | | | | | | | | | | | | | | | | | | | |
| Indirect | | | 2,090 | | | | 470 | | | | 523 | | | | 3,083 | | | | 237,027 | | | | 240,110 | |
| Direct | | | 37 | | | | 7 | | | | 21 | | | | 65 | | | | 16,486 | | | | 16,551 | |
| Other | | | 17 | | | | 0 | | | | 97 | | | | 114 | | | | 9,960 | | | | 10,074 | |
| Total loans | | $ | 13,909 | | | $ | 3,038 | | | $ | 26,215 | | | $ | 43,162 | | | $ | 3,261,551 | | | $ | 3,304,713 | |
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