Note 3 - Share-based Compensation - Components of Share-based Compensation (Details) - USD ($) $ in Thousands |
3 Months Ended | 6 Months Ended | ||
|---|---|---|---|---|
Jun. 30, 2025 |
Jun. 30, 2024 |
Jun. 30, 2025 |
Jun. 30, 2024 |
|
| Restricted Stock Units (RSUs) [Member] | ||||
| Pretax compensation expense | $ 14,502 | $ 13,409 | $ 26,545 | $ 25,817 |
| Tax benefit | 3,882 | 3,540 | 7,106 | 6,816 |
| Restricted share unit expense, net of tax | 10,620 | 9,869 | 19,439 | 19,001 |
| Performance Shares [Member] | ||||
| Pretax compensation expense | 5,162 | 5,746 | 11,562 | 11,747 |
| Tax benefit | 1,382 | 1,517 | 3,095 | 3,101 |
| Restricted share unit expense, net of tax | $ 3,780 | $ 4,229 | $ 8,467 | $ 8,646 |