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Note 15 - Accumulated Other Comprehensive Income (Loss) (Tables) | 6 Months Ended
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Jun. 30, 2021
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.
Rollforward of accumulated other comprehensive income
|  | Three Months Ended June 30, 2021 |  | Six Months Ended June 30, 2021
(In thousands) |  | Before Tax |  | Tax Effect |  | Net of Tax |  | Before Tax |  | Tax Effect |  | Net of Tax
Balance at beginning of period |  | $ | 147,766 |  |  | $ | 31,031 |  |  | $ | 116,735 |  |  | $ | 333,829 |  |  | $ | 70,104 |  |  | $ | 263,725 |
Other comprehensive income (loss) |  |  |  |  |  |  |  |  |  |  |  |
Unrealized holding gains (losses) on investments arising during the period for which an allowance for expected credit losses has not been recognized |  | 81,617 |  |  | 17,140 |  |  | 64,477 |  |  | (104,926) |  |  | (22,034) |  |  | (82,892) |
Less: Reclassification adjustment for net gains (losses) on investments included in net income (loss) (1) |  |  |  |  |  |  |  |  |  |  |  |
Net realized gains (losses) on disposals and non-credit related impairment losses |  | 2,375 |  |  | 499 |  |  | 1,876 |  |  | 1,585 |  |  | 333 |  |  | 1,252 |
Net decrease (increase) in expected credit losses |  | 608 |  |  | 128 |  |  | 480 |  |  | 918 |  |  | 193 |  |  | 725 |
Other comprehensive income (loss) |  | 78,634 |  |  | 16,513 |  |  | 62,121 |  |  | (107,429) |  |  | (22,560) |  |  | (84,869) |
Balance at end of period |  | $ | 226,400 |  |  | $ | 47,544 |  |  | $ | 178,856 |  |  | $ | 226,400 |  |  | $ | 47,544 |  |  | $ | 178,856 |
|  | Three Months Ended June 30, 2020 |  | Six Months Ended June 30, 2020
(In thousands) |  | Before Tax |  | Tax Effect |  | Net of Tax |  | Before Tax |  | Tax Effect |  | Net of Tax
Balance at beginning of period |  | $ | 37,722 |  |  | $ | 7,921 |  |  | $ | 29,801 |  |  | $ | 139,858 |  |  | $ | 29,370 |  |  | $ | 110,488 |
Other comprehensive income (loss) |  |  |  |  |  |  |  |  |  |  |  |
Unrealized holding gains (losses) on investments arising during the period for which an allowance for expected credit losses has not been recognized |  | 234,249 |  |  | 49,193 |  |  | 185,056 |  |  | 142,738 |  |  | 29,975 |  |  | 112,763 |
Less: Reclassification adjustment for net gains (losses) on investments included in net income (loss) (1) |  |  |  |  |  |  |  |  |  |  |  |
Net realized gains (losses) on disposals and non-credit related impairment losses |  | 6,195 |  |  | 1,301 |  |  | 4,894 |  |  | 16,820 |  |  | 3,532 |  |  | 13,288 |
Net decrease (increase) in expected credit losses |  | (2,782) |  |  | (584) |  |  | (2,198) |  |  | (2,782) |  |  | (584) |  |  | (2,198) |
Other comprehensive income (loss) |  | 230,836 |  |  | 48,476 |  |  | 182,360 |  |  | 128,700 |  |  | 27,027 |  |  | 101,673 |
Balance at end of period |  | $ | 268,558 |  |  | $ | 56,397 |  |  | $ | 212,161 |  |  | $ | 268,558 |  |  | $ | 56,397 |  |  | $ | 212,161 |
(1)Included in net gains (losses) on investments and other financial instruments on our condensed consolidated statements of operations.

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