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Note 6 - Investments Securities Lending Agreements (Details) $ in Millions | 12 Months Ended |
--- | --- | ---
Dec. 31, 2019 USD ($) | Dec. 31, 2018 USD ($)
Securities Financing Transaction [Line Items] |  |
Securities Lending Rate of Collateral Required | 1.02 |
Debt Security, Government, Non-US |  |
Securities Financing Transaction [Line Items] |  |
Securities Lending Rate of Collateral Required | 1.05 |
Securities Financing Transaction, Fair Value |  |
Securities Financing Transaction [Line Items] |  |
Securities Lending Rate of Collateral Required | 1 |
Securities Received as Collateral | $ 42.4 | $ 16.8

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- Definition The rate of collateral required, expressed as a percentage of the fair value of the loaned securities. + References No definition available. + Details
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- Definition The carrying value as of the balance sheet date of the assets received as collateral against securities loaned to other broker-dealers. Borrowers of securities generally are required to provide collateral to the lenders of securities, commonly cash but sometimes other securities or standby letters of credit, with a value slightly higher than that of the securities borrowed. In instances where the entity is permitted to sell or re-pledge these securities, the entity reports the fair value of the collateral received and the related obligation to return the collateral as a liability. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 860 -SubTopic 30 -Section 50 -Paragraph 1A -Subparagraph (b)(1) -URI http://asc.fasb.org/extlink&oid=109249958&loc=SL6224234-111729 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 860 -SubTopic 10 -Section 05 -Paragraph 17 -URI http://asc.fasb.org/extlink&oid=109246787&loc=d3e93645-111703 + Details
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