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Note 6 - Investments Change in Unrealized Gains (Losses) Recorded in AOCI (Details) - USD ($) $ in Thousands | 12 Months Ended
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Dec. 31, 2019 | Dec. 31, 2018 | Dec. 31, 2017
Change In Unrealized Gains (Losses) Recorded In AOCI [Line Items] |  |  |  |
Unrealized holding gains (losses) arising during the period, net of tax |  | $ 180,441 | $ (97,356) | $ 31,903
Less reclassification adjustment for net gains (losses) included in net income (loss), net of tax |  | 8,897 | (10,270) | (2,642)
Net unrealized gains (losses) on investments, net of tax |  | 171,544 | (87,086) | 34,545
Fixed-maturities available for sale |  |  |  |
Change In Unrealized Gains (Losses) Recorded In AOCI [Line Items] |  |  |  |
Unrealized holding gains (losses) arising during the period, net of tax |  | 180,441 | (97,356) | 32,147
Less reclassification adjustment for net gains (losses) included in net income (loss), net of tax |  | 8,897 | (10,270) | (2,556)
Net unrealized gains (losses) on investments, net of tax |  | 171,544 | (87,086) | 34,703
Equity securities |  |  |  |
Change In Unrealized Gains (Losses) Recorded In AOCI [Line Items] |  |  |  |
Unrealized holding gains (losses) arising during the period, net of tax | [1] | 0 | 0 | (244)
Less reclassification adjustment for net gains (losses) included in net income (loss), net of tax | [1] | 0 | 0 | (86)
Net unrealized gains (losses) on investments, net of tax | [1] | $ 0 | $ 0 | $ (158)
[1] | Prior to our implementation of the update to the standard for the accounting of financial instruments effective January 1, 2018, the unrealized losses associated with equity securities were classified in accumulated other comprehensive income. Effective January 1, 2018, we measure our equity investments at fair value, with changes in fair value recognized in net income.

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- Definition Amount after tax and reclassification adjustments, of appreciation (loss) in value of unsold available-for-sale securities. Excludes amounts related to other than temporary impairment (OTTI) loss. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section 45 -Paragraph 10A -Subparagraph (f) -URI http://asc.fasb.org/extlink&oid=118930883&loc=SL7669646-108580 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section 45 -Paragraph 11 -URI http://asc.fasb.org/extlink&oid=118930883&loc=d3e637-108580 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section 45 -Paragraph 10A -Subparagraph (e) -URI http://asc.fasb.org/extlink&oid=118930883&loc=SL7669646-108580 + Details
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