Note 13 - Income Taxes - Effective Income Tax Rate Reconciliation (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Income tax expense at U.S. federal statutory rate	$ 27,493	$ 59,172	$ 65,565
Limited tax benefit due to wage and stock-based compensation	6,387	3,811	7,362
State deferred income taxes	1,955	2,903	2,335
Other, net	16	19	99
Total income tax expense	$ 35,851	$ 65,905	$ 75,361
Effective income tax rate	27.40%	23.40%	24.10%