Note 13 - Income Taxes - Reconciliation (Details) - USD ($) $ in Thousands	12 Months Ended
Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Income taxes at the federal statutory rate	$ 65,694	$ 31,862	$ 39,530
State income taxes, net of federal benefit	7,874	4,487	5,303
Tax effect of permanent differences	(2,502)	283	1,562
Foreign tax rate differential	(313)	(111)
Other, net	1,515	315	1,545
Provision (benefit) for income taxes	$ 72,268	$ 36,836	$ 47,940

Amount of current income tax expense (benefit) and deferred income tax expense (benefit) pertaining to continuing operations.

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