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Note 14 - Accumulated Other Comprehensive Income (Loss) (Tables) | 3 Months Ended
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Mar. 31, 2020
Accumulated Other Comprehensive Income (Loss), Net of Tax [Abstract] |
Schedule of Accumulated Other Comprehensive Income (Loss) [Table Text Block] | The following table shows the rollforward of accumulated other comprehensive income (loss) as of the periods indicated:
| Three Months Ended March 31, 2020
(In thousands) | Before Tax |  | Tax Effect |  | Net of Tax
Balance at beginning of period | $ | 139,858 |  |  | $ | 29,370 |  |  | $ | 110,488 |
Other comprehensive income (loss): |  |  |  |  |
Unrealized gains (losses) on investments: |  |  |  |  |
Unrealized holding gains (losses) arising during the period | (91,511 | ) |  | (19,218 | ) |  | (72,293 | )
Less: Reclassification adjustment for net gains (losses) included in net income (1) | 10,625 |  |  | 2,231 |  |  | 8,394 |
Net unrealized gains (losses) on investments | (102,136 | ) |  | (21,449 | ) |  | (80,687 | )
Other comprehensive income (loss) | (102,136 | ) |  | (21,449 | ) |  | (80,687 | )
Balance at end of period | $ | 37,722 |  |  | $ | 7,921 |  |  | $ | 29,801 |
| Three Months Ended March 31, 2019
(In thousands) | Before Tax |  | Tax Effect |  | Net of Tax
Balance at beginning of period | $ | (77,114 | ) |  | $ | (16,194 | ) |  | $ | (60,920 | )
Other comprehensive income (loss): |  |  |  |  |
Unrealized gains (losses) on investments: |  |  |  |  |
Unrealized holding gains (losses) arising during the period | 98,763 |  |  | 20,740 |  |  | 78,023 |
Less: Reclassification adjustment for net gains (losses) included in net income (1) | (495 | ) |  | (104 | ) |  | (391 | )
Net unrealized gains (losses) on investments | 99,258 |  |  | 20,844 |  |  | 78,414 |
Other comprehensive income (loss) | 99,258 |  |  | 20,844 |  |  | 78,414 |
Balance at end of period | $ | 22,144 |  |  | $ | 4,650 |  |  | $ | 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 Tabular disclosure of the components of accumulated other comprehensive income (loss). + References Reference 1: 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 + Details
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