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Note 15 - Accumulated Other Comprehensive Income (Loss) | 12 Months Ended
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Dec. 31, 2020
Other Comprehensive Income (Loss), Net of Tax [Abstract] |
Comprehensive Income (Loss) Note [Text Block] | Accumulated Other Comprehensive Income (Loss) The following tables show the rollforward of accumulated other comprehensive income (loss) as of the periods indicated.
|  | Year Ended December 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 for which an allowance for expected credit losses has not been recognized |  | 226,280 |  |  | 47,519 |  |  | 178,761 |
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 |  | 33,468 |  |  | 7,028 |  |  | 26,440 |
Net decrease (increase) in expected credit losses |  | (1,254) |  |  | (263) |  |  | (991) |
Net unrealized gains (losses) on investments |  | 194,066 |  |  | 40,754 |  |  | 153,312 |
Other adjustments to comprehensive income, net |  | (95) |  |  | (20) |  |  | (75) |
Other comprehensive income (loss) |  | 193,971 |  |  | 40,734 |  |  | 153,237 |
Balance at end of period |  | $ | 333,829 |  |  | $ | 70,104 |  |  | $ | 263,725 |
|  | Year Ended December 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 |  | 228,406 |  |  | 47,965 |  |  | 180,441 |
Less: Reclassification adjustment for net gains (losses) included in net income (1) |  | 11,262 |  |  | 2,365 |  |  | 8,897 |
Net unrealized gains (losses) on investments |  | 217,144 |  |  | 45,600 |  |  | 171,544 |
Other adjustments to comprehensive income, net |  | (172) |  |  | (36) |  |  | (136) |
Other comprehensive income (loss) |  | 216,972 |  |  | 45,564 |  |  | 171,408 |
Balance at end of period |  | $ | 139,858 |  |  | $ | 29,370 |  |  | $ | 110,488 |
|  | Year Ended December 31, 2018
(In thousands) |  | Before Tax |  | Tax Effect |  | Net of Tax
Balance at beginning of period |  | $ | 32,669 |  |  | $ | 9,584 |  |  | $ | 23,085 |
Cumulative effect of adopting accounting standard updates |  | 284 |  |  | (2,664) |  |  | 2,948 |
Balance adjusted for cumulative effect of adopting accounting standard updates |  | 32,953 |  |  | 6,920 |  |  | 26,033 |
Other comprehensive income (loss): |  |  |  |  |  |
Unrealized gains (losses) on investments: |  |  |  |  |  |
Unrealized holding gains (losses) arising during the period |  | (123,235) |  |  | (25,879) |  |  | (97,356) |
Less: Reclassification adjustment for net gains (losses) included in net income (1) |  | (13,000) |  |  | (2,730) |  |  | (10,270) |
Net unrealized gains (losses) on investments |  | (110,235) |  |  | (23,149) |  |  | (87,086) |
Other adjustments to comprehensive income, net |  | 168 |  |  | 35 |  |  | 133 |
Other comprehensive income (loss) |  | (110,067) |  |  | (23,114) |  |  | (86,953) |
Balance at end of period |  | $ | (77,114) |  |  | $ | (16,194) |  |  | $ | (60,920) |
(1)Included in net gains (losses) on investments and other financial instruments in our consolidated statements of operations.

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- Definition The entire disclosure for comprehensive income, which includes, but is not limited to, 1) the amount of income tax expense or benefit allocated to each component of other comprehensive income, including reclassification adjustments, 2) the reclassification adjustments for each classification of other comprehensive income and 3) the ending accumulated balances for each component of comprehensive income. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -URI http://asc.fasb.org/topic&trid=2134417 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SX 210.5-03(21)) -URI http://asc.fasb.org/extlink&oid=120395209&loc=SL114868664-224227 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 220 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-04(23)) -URI http://asc.fasb.org/extlink&oid=120399700&loc=SL114874048-224260 Reference 4: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 220 -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-04(19)) -URI http://asc.fasb.org/extlink&oid=120400993&loc=SL114874131-224263 + Details
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