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Note 8 - Commitments and Off-balance Sheet Risk (Tables) | 9 Months Ended
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Sep. 30, 2021
Notes Tables |
Summary of Contractual Amounts of Financial Instruments With Off Balance Sheet Risk [Table Text Block] |
|  | September 30, 2021 |  |  | December 31, 2020 |
Commercial unused lines of credit |  | $ | 1,080,801,000 |  |  | $ | 1,019,496,000 |
Unused lines of credit secured by 1 – 4 family residential properties |  |  | 60,859,000 |  |  |  | 59,396,000 |
Credit card unused lines of credit |  |  | 88,013,000 |  |  |  | 72,495,000 |
Other consumer unused lines of credit |  |  | 61,047,000 |  |  |  | 30,707,000 |
Commitments to make loans |  |  | 253,124,000 |  |  |  | 227,558,000 |
Standby letters of credit |  |  | 29,375,000 |  |  |  | 20,543,000 |
|  | $ | 1,573,219,000 |  |  | $ | 1,430,195,000 |

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