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Note 15 - Accumulated Other Comprehensive Income (Loss) | 9 Months Ended
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Sep. 30, 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 September 30, 2020 |  | Nine Months Ended September 30, 2020
(In thousands) | Before Tax |  | Tax Effect |  | Net of Tax |  | Before Tax |  | Tax Effect |  | Net of Tax
Balance at beginning of period | $ | 268,558 |  |  | $ | 56,397 |  |  | $ | 212,161 |  |  | $ | 139,858 |  |  | $ | 29,370 |  |  | $ | 110,488 |
Other comprehensive income (loss): |  |  |  |  |  |  |  |  |  |  |
Unrealized gains (losses) on investments: |  |  |  |  |  |  |  |  |  |  |
Unrealized holding gains (losses) arising during the period for which an allowance for expected credit losses has not been recognized | 39,037 |  |  | 8,198 |  |  | 30,839 |  |  | 181,775 |  |  | 38,173 |  |  | 143,602 |
Less: Reclassification adjustment for net gains (losses) included in net income (loss): (1) |  |  |  |  |  |  |  |  |  |  |
Net realized gains (losses) on disposals and non-credit related impairment losses | 13,777 |  |  | 2,893 |  |  | 10,884 |  |  | 30,597 |  |  | 6,425 |  |  | 24,172 |
Net decrease (increase) in expected credit losses | 186 |  |  | 39 |  |  | 147 |  |  | (2,596) |  |  | (545) |  |  | (2,051) |
Net unrealized gains (losses) on investments | 25,074 |  |  | 5,266 |  |  | 19,808 |  |  | 153,774 |  |  | 32,293 |  |  | 121,481 |
Other comprehensive income (loss) | 25,074 |  |  | 5,266 |  |  | 19,808 |  |  | 153,774 |  |  | 32,293 |  |  | 121,481 |
Balance at end of period | $ | 293,632 |  |  | $ | 61,663 |  |  | $ | 231,969 |  |  | $ | 293,632 |  |  | $ | 61,663 |  |  | $ | 231,969 |
| Three Months Ended September 30, 2019 |  | Nine Months Ended September 30, 2019
(In thousands) | Before Tax |  | Tax Effect |  | Net of Tax |  | Before Tax |  | Tax Effect |  | Net of Tax
Balance at beginning of period | $ | 111,977 |  |  | $ | 23,515 |  |  | $ | 88,462 |  |  | $ | (77,114) |  |  | $ | (16,194) |  |  | $ | (60,920) |
Other comprehensive income (loss): |  |  |
Unrealized gains (losses) on investments: |
Unrealized holding gains (losses) arising during the period | 51,460 |  |  | 10,806 |  |  | 40,654 |  |  | 241,363 |  |  | 50,686 |  |  | 190,677 |
Less: Reclassification adjustment for net gains (losses) included in net income (loss) (1) | 4,401 |  |  | 924 |  |  | 3,477 |  |  | 5,209 |  |  | 1,094 |  |  | 4,115 |
Net unrealized gains (losses) on investments | 47,059 |  |  | 9,882 |  |  | 37,177 |  |  | 236,154 |  |  | 49,592 |  |  | 186,562 |
Unrealized foreign currency translation adjustments | — |  |  | — |  |  | — |  |  | (4) |  |  | (1) |  |  | (3) |
Other comprehensive income (loss) | 47,059 |  |  | 9,882 |  |  | 37,177 |  |  | 236,150 |  |  | 49,591 |  |  | 186,559 |
Balance at end of period | $ | 159,036 |  |  | $ | 33,397 |  |  | $ | 125,639 |  |  | $ | 159,036 |  |  | $ | 33,397 |  |  | $ | 125,639 |
______________________ (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://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 830 -SubTopic 30 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6450520&loc=d3e32583-110901 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=121641772&loc=SL7669686-108580 Reference 3: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 830 -SubTopic 30 -Section 45 -Paragraph 20 -URI http://asc.fasb.org/extlink&oid=118261656&loc=d3e32211-110900 + Details
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