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Note 12 - Commitments and Contingencies (Tables) | 12 Months Ended
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Dec. 31, 2021
Notes Tables |
Schedule of Fair Value, Off-balance Sheet Risks [Table Text Block] |
|  | As of December 31, |
|  | 2021 |  |  | 2020 |
|  | (In thousands) |
Commitments to extend credit |  | $ | 3,297,362 |  |  | $ | 2,977,528 |
Standby letters of credit |  |  | 266,490 |  |  |  | 234,200 |
Commercial letters of credit |  |  | 16,652 |  |  |  | 16,821 |
Bill of lading guarantees |  |  | — |  |  |  | 238 |
Total |  | $ | 3,580,504 |  |  | $ | 3,228,787 |

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