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Note 14 - Accumulated Other Comprehensive Income (Loss) Rollforward of Accumulated Other Comprehensive Income (Details) - USD ($) $ in Thousands | 3 Months Ended
--- | ---
Mar. 31, 2020 | Mar. 31, 2019
Other Comprehensive Income, Net of Tax [Abstract] |  |  |
AOCI, Net of Tax, Balance at beginning of period |  | $ 110,488 |
Unrealized holding gains (losses) arising during the period |  | (72,293) | $ 78,023
Less: Reclassification adjustment for net gains (losses) included in net income (loss) |  | 8,394 | (391)
Other comprehensive income (loss), net of tax |  | (80,687) | 78,414
AOCI, Net of Tax, Balance at end of period |  | 29,801 |
Other Comprehensive Income |  |  |
Other Comprehensive Income, before Tax [Abstract] |  |  |
AOCI before Tax, Balance at beginning of period |  | 139,858 | (77,114)
Unrealized holding gains (losses) arising during the period |  | (91,511) | 98,763
Less: Reclassification adjustment for net gains (losses) included in net income | [1] | 10,625 | (495)
Net unrealized gains (losses) on investments |  | (102,136) | 99,258
Other comprehensive income (loss) |  | (102,136) | 99,258
AOCI before Tax, Balance at end of period |  | 37,722 | 22,144
Other Comprehensive Income, Tax [Abstract] |  |  |
AOCI, Tax, Balance at beginning of period |  | 29,370 | (16,194)
Unrealized holding gains (losses) arising during the period |  | (19,218) | 20,740
Less: Reclassification adjustment for net gains (losses) included in net income | [1] | 2,231 | (104)
Net unrealized gains (losses) on investments |  | (21,449) | 20,844
Other comprehensive income (loss) |  | (21,449) | 20,844
AOCI Tax, Balance at end of period |  | 7,921 | 4,650
Other Comprehensive Income, Net of Tax [Abstract] |  |  |
AOCI, Net of Tax, Balance at beginning of period |  | 110,488 | (60,920)
Unrealized holding gains (losses) arising during the period |  | (72,293) | 78,023
Less: Reclassification adjustment for net gains (losses) included in net income (loss) | [1] | 8,394 | (391)
Net unrealized gains (losses) on investments |  | (80,687) | 78,414
Other comprehensive income (loss), net of tax |  | (80,687) | 78,414
AOCI, Net of Tax, Balance at end of period |  | $ 29,801 | $ 17,494
[1] | Included in net gains (losses) on investments and other financial instruments on our condensed consolidated statements of operations.

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- Definition Accumulated change in equity from transactions and other events and circumstances from non-owner sources, net of tax effect, at period end. Excludes Net Income (Loss), and accumulated changes in equity from transactions resulting from investments by owners and distributions to owners. Includes foreign currency translation items, certain pension adjustments, unrealized gains and losses on certain investments in debt and equity securities, other than temporary impairment (OTTI) losses related to factors other than credit losses on available-for-sale and held-to-maturity debt securities that an entity does not intend to sell and it is not more likely than not that the entity will be required to sell before recovery of the amortized cost basis, as well as changes in the fair value of derivatives related to the effective portion of a designated cash flow hedge. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -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 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section 45 -Paragraph 14A -URI http://asc.fasb.org/extlink&oid=118930883&loc=SL7669686-108580 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section 45 -Paragraph 14 -URI http://asc.fasb.org/extlink&oid=118930883&loc=d3e681-108580 + Details
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- Definition Amount before tax of increase (decrease) in accumulated equity from transactions and other events and circumstances from non-owner sources, attributable to parent. Excludes net income (loss), and accumulated changes in equity from transactions resulting from investments by owners (distributions to owners). + References No definition available. + Details
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- Definition Amount after tax and reclassification adjustments, of appreciation (loss) in value of unsold available-for-sale securities, attributable to parent entity. Excludes amounts related to other than temporary impairment (OTTI) loss. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 810 -SubTopic 10 -Section 50 -Paragraph 1A -Subparagraph (c)(3) -URI http://asc.fasb.org/extlink&oid=109239629&loc=SL4573702-111684 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 810 -SubTopic 10 -Section 45 -Paragraph 19 -URI http://asc.fasb.org/extlink&oid=108774443&loc=SL4569616-111683 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 810 -SubTopic 10 -Section 45 -Paragraph 20 -URI http://asc.fasb.org/extlink&oid=108774443&loc=SL4569643-111683 + Details
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