Note 6 - Credit Quality Indicators - Purchased Loans (Details) - USD ($) $ in Thousands |
1 Months Ended | 3 Months Ended | 9 Months Ended |
|---|---|---|---|
Mar. 31, 2026 |
Sep. 30, 2026 |
Sep. 30, 2026 |
|
| Net purchase discount | $ (5,300) | ||
| Allowance for credit losses of PCD loans | (4,063) | ||
| Allowance for credit losses of PSLs | $ (110) | $ (15,537) | |
| Middlefield Banc Corp [Member] | |||
| Par value of acquired loans at acquisition | $ 1,531,402 | ||
| Net purchase discount | (21,229) | ||
| Allowance for credit losses of PCD loans | (4,063) | ||
| Allowance for credit losses of PSLs | (15,267) | ||
| Purchase price of loans at acquisition | $ 1,490,843 |