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Note 15 - Balance Sheet Offsetting (Tables) | 3 Months Ended
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Mar. 31, 2016
Disclosure Text Block Supplement [Abstract] |
Schedule of Amounts Recognized in Balance Sheet [Table Text Block] |
|  |  |  |  |  |  |  |  |  |  |  |  |  | Gross Amounts Not Offset in the Balance Sheet |
|  | Gross Amounts Recognized |  |  | Gross Amounts Offset in the Balance Sheet |  |  | Net Amounts Presented in the Balance Sheet |  |  | Financial Instruments |  |  | Collateral Posted |  |  | Net Amount |
|  | (In thousands) |
March 31, 2016 |  |  |
Liabilities: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Securities sold under agreements to repurchase |  | $ | 400,000 |  |  | $ | - |  |  | $ | 400,000 |  |  | $ | - |  |  | $ | (400,000 | ) |  | $ | - |
Derivatives |  | $ | 14,878 |  |  | $ | - |  |  | $ | 14,878 |  |  | $ | - |  |  | $ | (14,878 | ) |  | $ | - |
December 31, 2015 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Liabilities: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Securities sold under agreements to repurchase |  | $ | 400,000 |  |  | $ | - |  |  | $ | 400,000 |  |  | $ | - |  |  | $ | (400,000 | ) |  | $ | - |
Derivatives |  | $ | 6,496 |  |  | $ | - |  |  | $ | 6,496 |  |  | $ | - |  |  | $ | (6,496 | ) |  | $ | - |

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- Definition Tabular disclosure of the amounts that are recognized in the balance sheet (or statement of financial position) for pension plans and/or other employee benefit plans, showing separately the assets and current and noncurrent liabilities (if applicable) recognized. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=65897934&loc=d3e1928-114920 + Details
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