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Note 5 - Income Taxes - Summary of Income Tax Contingencies (Details) - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
Balance $ 351,047 [1] $ 414,042 [1] $ 399,292
Additions based on tax positions related to the current year 53   14,741
Additions based on tax positions related to a prior year 18,515 2,223 1,964
Settlement and lapse of statute of limitations (35,962) (64,458) (1,897)
Reductions based on tax positions related to a prior year   (760) (58)
Balance [1] $ 333,653 $ 351,047 $ 414,042
[1] The gross balance reported as uncertain tax positions is largely offset by $322.1 million of foreign tax credits and other tax attributes.