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Note 13 - Commitments and Contingencies (Tables) | 12 Months Ended
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Dec. 31, 2017
Notes Tables |
Schedule of Fair Value, Off-balance Sheet Risks [Table Text Block] |
|  | As of December 31 , |
|  | 201 7 |  |  | 201 6 |
|  | (In thousands ) |
Commitments to extend credit |  | $ | 2,366,368 |  |  | $ | 2,062,241 |
Standby letters of credit |  |  | 140,814 |  |  |  | 75,396 |
Commercial letters of credit |  |  | 27,353 |  |  |  | 37,283 |
Bill of lading guarantees |  |  | 24 |  |  |  | 75 |
Total |  | $ | 2,534,559 |  |  | $ | 2,174,995 |
Schedule of Future Minimum Rental Payments for Operating Leases [Table Text Block] |
Year Ending December 31 , |  | Commitment s |
|  | (In thousands ) |
2018 |  | $ | 10,076 |
2019 |  |  | 7,720 |
2020 |  |  | 5,839 |
2021 |  |  | 4,996 |
2022 |  |  | 4,012 |
Thereafter |  |  | 7,463 |
Total minimum lease payments |  | $ | 40,106 |
Schedule of Future Rental Payments to Be Received for Operating Leases [Table Text Block] |
Year Ending December 31 , |  | Commitment s |
|  | (In thousands ) |
2018 |  | $ | 337 |
2019 |  |  | 186 |
2020 |  |  | 91 |
2021 |  |  | 49 |
Thereafter |  |  | 25 |
Total minimum lease payments to be received |  | $ | 688 |

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- Definition Tabular disclosure of the fair value of financial instruments (as defined), including financial assets and financial liabilities (collectively, as defined) which are not recognized in the financial statements (off-balance sheet) because they fail to meet some other criterion for recognition. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 825 -SubTopic 10 -Section 50 -Paragraph 11 -URI http://asc.fasb.org/extlink&oid=77997519&loc=d3e13467-108611 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 825 -SubTopic 10 -Section 50 -Paragraph 10 -URI http://asc.fasb.org/extlink&oid=77997519&loc=d3e13433-108611 + Details
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