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Note 6 - Investments - Net Gains (Losses) on Investments (Details) - USD ($) $ in Thousands | 3 Months Ended
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Mar. 31, 2021 | Mar. 31, 2020
Gain (Loss) on Securities [Line Items] |  |
Net realized gains (losses) on investments | $ (182) | $ 11,639
Impairment losses due to intent to sell | 0 | (622)
Net decrease (increase) in expected credit losses | 310 | 0
Net unrealized gain (losses) on investments | (2,519) | (26,845)
Total net gains (losses) on investments | (2,391) | (15,828)
Fixed-maturities available for sale |  |
Gain (Loss) on Securities [Line Items] |  |
Fixed maturities available for sale, net realized gain (loss) | (790) | 11,247
Gross investment gains from sales and redemptions | 4,117 | 11,899
Gross investment losses from sales and redemptions | (4,907) | (652)
Trading Securities |  |
Gain (Loss) on Securities [Line Items] |  |
Trading securities, net realized gain (loss) | 503 | 49
Equity securities |  |
Gain (Loss) on Securities [Line Items] |  |
Equity securities, net realized gain (loss) | 0 | 310
Other investments |  |
Gain (Loss) on Securities [Line Items] |  |
Other investments, net realized gain (loss) | $ 105 | $ 33

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- Definition This amount represents the net realized gains (losses) on all fixed-maturities, equity, trading, short-term, and other-invested assets securities, excluding other-than-temporary impairments and net unrealized gains (losses) on investment securities. + References No definition available. + Details
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- Definition Amount of realized and unrealized gain (loss) on investment. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 10 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=121645371&loc=d3e27405-111563 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SX 210.5-03.7(c),9(a)) -URI http://asc.fasb.org/extlink&oid=120395209&loc=SL114868664-224227 Reference 3: http://www.xbrl.org/2003/role/recommendedDisclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=121586364&loc=d3e3602-108585 + Details
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