Note 13 - Income Taxes - Reconciliation (Details) - USD ($) $ in Thousands	12 Months Ended
Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Income taxes at the federal statutory rate	$ 97,032	$ 106,959	$ 65,694
Income taxes at the federal statutory rate	21.00%	21.00%	21.00%
State income taxes, net of federal benefit	$ 14,120	$ 12,708	$ 7,874
State income taxes, net of federal benefit	3.10%	2.50%	2.50%
Tax effect of permanent differences	$ 1,357	$ (488)	$ (2,502)
Tax effect of permanent differences	0.30%	(0.10%)	(0.80%)
Foreign tax rate differential	$ 266	$ (2,134)	$ (313)
Foreign tax rate differential	0.00%	(0.40%)	(0.10%)
Other, net	$ 1,225	$ 197	$ 1,515
Other, net	0.30%	0.00%	0.50%
Provision for income taxes	$ 114,000	$ 117,242	$ 72,268
Provision for income taxes	24.70%	23.00%	23.10%

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

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Percentage of domestic federal statutory tax rate applicable to pretax income (loss).

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