Note 5 - Income Taxes (Tables)

12 Months Ended

Dec. 31, 2023

Notes Tables

Schedule of Components of Income Tax Expense (Benefit) [Table Text Block]

(In thousands)	2023			2022		2021
Current:
Federal	$	33,416		$	18,025	$	18,872
State		4,706			3,914		3,367
Total current		38,122			21,939		22,239
Deferred:
Federal		(13,526	)		9,795		3,462
State		(1,053	)		2,083		603
Total deferred		(14,579	)		11,878		4,065
Total expense	$	23,543		$	33,817	$	26,304

Schedule of Effective Income Tax Rate Reconciliation [Table Text Block]

	2023			2022			2021
Federal statutory income tax rate		21	%		21	%		21	%
Increase in taxes arising from state income taxes, net of federal income tax benefit		3			3			3
Per diem and other non-deductible expenses		2			-			-
Other, net		(1	)		(1	)		-
Effective tax rate		25	%		23	%		24	%

Schedule of Deferred Tax Assets and Liabilities [Table Text Block]

(In thousands)	2023		2022
Deferred tax assets:
Reserves and accrued liabilities	$	13,126	$	13,244
Other		1,212		1,597
		14,338		14,841
Deferred tax liabilities:
Depreciation		133,634		148,285
Prepaid expenses		3,166		3,597
		136,800		151,882
Net deferred tax liability	$	122,462	$	137,041