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Note 7 - Income Taxes (Details Textual) - USD ($) $ in Thousands | 12 Months Ended
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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

X
- Definition The amount of estimated penalties and interest accrued as liabilities (receivables) as of the balance sheet date arising from income tax examinations. + References No definition available. + Details
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X
- Definition The sum of the amounts of estimated penalties and interest expense (benefit) recognized in the period arising from income tax examinations. + References No definition available. + Details
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X
- Definition Amount of deferred tax assets for which it is more likely than not that a tax benefit will not be realized. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=121826272&loc=d3e32537-109319 + Details
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X
- Definition Amount of income tax expense (benefit) from continuing operations attributable to an adjustment of a deferred tax liability or asset for enacted changes in tax laws or rates or a change in the tax status of the entity. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 9 -Subparagraph (g) -URI http://asc.fasb.org/extlink&oid=121826272&loc=d3e32639-109319 + Details
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X
- Definition The total amount of unrecognized tax benefits that, if recognized, would affect the effective tax rate. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 15A -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=121826272&loc=SL6600010-109319 + Details
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