Note 9 - Income Taxes (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021
Income Taxes.
Income tax expense	$ 9,818	$ 228	$ 20,472	$ 62
Amount of tax benefit for legislative changes				$ 1,400
Effective Income Tax Rate Reconciliation, Percent, Total	22.80%	10.00%	21.50%	9.00%
Statutory rate			21.00%