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Note 12 - Commitments and Contingencies (Tables) | 12 Months Ended
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Dec. 31, 2019
Notes Tables |
Schedule of Fair Value, Off-balance Sheet Risks [Table Text Block] |
|  | As of December 31, |
|  | 2019 |  |  | 2018 |
|  | (In thousands) |
Commitments to extend credit |  | $ | 3,077,081 |  |  | $ | 2,691,579 |
Standby letters of credit |  |  | 282,352 |  |  |  | 245,087 |
Commercial letters of credit |  |  | 22,209 |  |  |  | 35,759 |
Bill of lading guarantees |  |  | 319 |  |  |  | 730 |
Total |  | $ | 3,381,961 |  |  | $ | 2,973,155 |

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