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Note 13 - Commitments and Contingencies (Tables) | 12 Months Ended
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Dec. 31, 2016
Notes Tables |
Schedule of Fair Value, Off-balance Sheet Risks [Table Text Block] |
|  | As of December 31, |
|  | 2016 |  |  | 2015 |
|  | (In thousands) |
Commitments to extend credit |  | $ | 2,062,241 |  |  | $ | 1,971,848 |
Standby letters of credit |  |  | 75,396 |  |  |  | 49,081 |
Commercial letters of credit |  |  | 37,283 |  |  |  | 38,131 |
Bill of lading guarantees |  |  | 75 |  |  |  | 454 |
Total |  | $ | 2,174,995 |  |  | $ | 2,059,514 |
Schedule of Future Minimum Rental Payments for Operating Leases [Table Text Block] |
Year Ending December 31, |  | Commitments |
|  | (In thousands) |
2017 |  | $ | 8,562 |
2018 |  |  | 7,047 |
2019 |  |  | 5,192 |
2020 |  |  | 3,488 |
2021 |  |  | 3,102 |
Thereafter |  |  | 7,778 |
Total minimum lease payments |  | $ | 35,169 |
Schedule of Future Rental Payments to Be Received for Operating Leases [Table Text Block] |
|  | (In thousands) |
2017 |  | $ | 260 |
2018 |  |  | 153 |
2019 |  |  | 73 |
2020 |  |  | 15 |
Thereafter |  |  | - |
Total minimum lease payments to be received |  | $ | 501 |

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