Note 7 - Income Taxes (Details Textual) - USD ($) $ in Thousands |
12 Months Ended | ||
|---|---|---|---|
Dec. 31, 2021 |
Dec. 31, 2020 |
Dec. 31, 2019 |
|
| Income Tax Expense (Benefit), Continuing Operations, Adjustment of Deferred Tax (Asset) Liability | $ (32,000) | $ (21,000) | |
| Deferred Tax Assets, Valuation Allowance, Total | 0 | $ 0 | |
| Income Tax Examination, Penalties and Interest Accrued Liabilities (Receivables) | (1,000) | 8,000 | |
| Income Tax Examination, Penalties and Interest Expense (Benefit) | (5,000) | 5,000 | (4,000) |
| Unrecognized Tax Benefits that Would Impact Effective Tax Rate | $ 31,000 | $ 52,000 | $ 39,000 |