Note 13 - Income Taxes (Details Textual) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021	Dec. 31, 2021
Effective Income Tax Rate Reconciliation, at Federal Statutory Income Tax Rate, Percent			21.00%
Deferred Tax Assets, Valuation Allowance	$ 0		$ 0		$ 0
Income Tax Expense (Benefit), Total	31,597	$ 2,145	55,357	$ 4,680
Deferred Income Tax Liabilities, Net	111,159		111,159		55,802
State and Local Jurisdiction [Member] | Texas Margin Tax [Member]
Deferred Income Tax Liabilities, Net	3,400		3,400		$ 1,800
Cumulative Effect, Period of Adoption, Adjustment [Member]
Deferred Tax Assets, Gross, Total	$ 3,400		3,400
Income Tax Expense (Benefit), Total			$ 3,400