Note 5 - Income Taxes (Tables)

12 Months Ended

Dec. 31, 2022

Notes Tables

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

(In thousands)	2022		2021		2020
Current:
Federal	$	18,025	$	18,872	$	21,312
State		3,914		3,367		3,498
Total current		21,939		22,239		24,810
Deferred:
Federal		9,795		3,462		(1,557	)
State		2,083		603		633
Total deferred		11,878		4,065		(924	)
Total expense	$	33,817	$	26,304	$	23,886

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

	2022			2021			2020
Federal statutory income tax rate		21	%		21	%		21	%
Increase in taxes arising from state income taxes, net of federal income tax benefit		3			3			4
Per diem and other non-deductible expenses		-			-			1
Federal tax credits		-			-			(1	)
Other, net		(1	)		-			1
Effective tax rate		23	%		24	%		26	%

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

(In thousands)	2022		2021
Deferred tax assets:
Reserves and accrued liabilities	$	13,244	$	11,975
Other		1,597		1,597
		14,841		13,572
Deferred tax liabilities:
Depreciation		148,285		135,306
Prepaid expenses		3,597		3,429
		151,882		138,735
Net deferred tax liability	$	137,041	$	125,163