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Note 5 - Investments Securities Lending Agreements (Details) - USD ($) | Mar. 31, 2019 | Dec. 31, 2018
--- | --- | ---
Securities Financing Transaction [Line Items] |  |  |
Loaned securities |  | $ 22,606,000 | $ 27,860,000
Cash Collateral for Borrowed Securities |  | 6,233,000 | 11,699,000
Securities Held as Collateral, at Fair Value |  | 0 |
Securities Financing Transaction, Fair Value |  |  |
Securities Financing Transaction [Line Items] |  |  |
Loaned securities | [1] | 22,606,000 | 27,860,000
Cash Collateral for Borrowed Securities | [2] | 17,372,000 | 16,815,000
Reinvested Cash Collateral, Fair Value | [3] | 6,233,000 | 11,699,000
Securities Financing Transaction, Fair Value | US government and agency securities |  |  |
Securities Financing Transaction [Line Items] |  |  |
Loaned securities | [1] | 0 | 9,987,000
Securities Financing Transaction, Fair Value | Corporate bonds and notes |  |  |
Securities Financing Transaction [Line Items] |  |  |
Loaned securities | [1] | 6,526,000 | 7,818,000
Securities Financing Transaction, Fair Value | Equity securities |  |  |
Securities Financing Transaction [Line Items] |  |  |
Loaned securities | [1] | 16,080,000 | 10,055,000
Securities Financing Transaction, Cost |  |  |
Securities Financing Transaction [Line Items] |  |  |
Loaned securities |  | $ 22,537,000 | $ 28,992,000
[1] | Our securities loaned under securities lending agreements are reported at fair value within other assets in our condensed consolidated balance sheets. All of our securities lending agreements are classified as overnight and revolving. None of the amounts are subject to offsetting.
[2] | Securities collateral on deposit with us from Borrowers may not be transferred or re-pledged unless the Borrower is in default, and is therefore not reflected in our condensed consolidated financial statements.
[3] | All cash collateral received has been reinvested in accordance with the securities lending agreements and is included in short-term investments in our condensed consolidated balance sheets. Amounts payable on the return of cash collateral under securities lending agreements are included within other liabilities in our condensed consolidated balance sheets.

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- Definition Amount, after effects of master netting arrangements, of securities loaned to entities in exchange for collateral offset against a right to receive collateral. Includes liabilities not subject to a master netting arrangement and not elected to be offset. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 20 -Section 55 -Paragraph 13 -URI http://asc.fasb.org/extlink&oid=99393222&loc=SL20226016-175313 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 20 -Section 50 -Paragraph 3 -Subparagraph (e) -URI http://asc.fasb.org/extlink&oid=51824906&loc=SL20225862-175312 + Details
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- Definition Amount of asset associated with securities loaned to entities in exchange for collateral. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 20 -Section 55 -Paragraph 8 -URI http://asc.fasb.org/extlink&oid=99393222&loc=SL20226003-175313 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 20 -Section 50 -Paragraph 3 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=51824906&loc=SL20225862-175312 + 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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