Note 9 - Employee Retirement Plans (Tables)

12 Months Ended

Dec. 31, 2023

Notes Tables

Schedule of Allocation of Plan Assets [Table Text Block]

	Actual as of			Actual as of
	December 31, 2023			December 31, 2022
U.S. Pension plan:
Cash		3	%		3	%
Debt securities		33	%		28	%
Equity securities		64	%		69	%
Total		100	%		100	%

Schedule Of Fair Value Plan Assets Measured On Recurring Basis [Table Text Block]

			Quoted prices in		Significant		Significant
			active		observable		unobservable		Measured at
(In Thousands)			markets		inputs		inputs		Net Asset
	Fair Value		(Level 1)		(Level 2)		(Level 3)		Value
Pension plan measured at fair value:
Equity securities	$	19,773	$	14,212	$	57	$	5,504	$	—
Debt securities		10,058		296		9,762		—		—
Cash and cash equivalents		1,012		—		1,012		—		—
Total fair value of plan assets	$	30,843	$	14,508	$	10,831	$	5,504	$	—

			Quoted prices in		Significant		Significant
			active		observable		unobservable		Measured at
(In Thousands)			markets		inputs		inputs		Net Asset
	Fair Value		(Level 1)		(Level 2)		(Level 3)		Value
Pension plan measured at fair value:
Equity securities, primarily exchange traded funds	$	31,196	$	26,847	$	1,147	$	3,202	$	—
Debt securities		12,928		3,434		9,494		—		—
Cash and cash equivalents		1,254		—		1,254		—		—
Total fair value of plan assets	$	45,378	$	30,281	$	11,895	$	3,202	$	—

Schedule of Net Funded Status [Table Text Block]

(In Thousands)	Year Ended December 31,
	2023			2022			2021
Change in benefit obligation:
Benefit obligation at beginning of the period	$	64,273		$	84,308		$	88,960
Interest cost		2,873			2,313			2,168
Benefits paid		(5,104	)		(5,667	)		(5,693	)
Actuarial (gain) loss (A)		1,916			(16,681	)		(1,127	)
Settlement		(13,861	)		—			—
Benefit obligation at end of the period	$	50,097		$	64,273		$	84,308
Change in plan assets:
Fair value of plan assets at beginning of the period	$	45,378		$	56,779		$	56,495
Actual return		2,827			(7,337	)		4,374
Employer contributions		1,603			1,603			1,603
Benefits paid		(5,104	)		(5,667	)		(5,693	)
Settlement		(13,861	)		—			—
Fair value of plan assets at end of the period		30,843			45,378			56,779
Unfunded status at end of the period	$	(19,254	)	$	(18,895	)	$	(27,529	)
Net amount recognized in the balance sheet consists of:
Current liabilities	$	(1,572	)	$	(1,575	)	$	(1,578	)
Noncurrent liabilities		(17,682	)		(17,320	)		(25,951	)
Net amount recognized	$	(19,254	)	$	(18,895	)	$	(27,529	)

Defined Benefit Plan, Plan with Accumulated Benefit Obligation in Excess of Plan Assets [Table Text Block]

(In Thousands)	December 31,		December 31,
	2023		2022
Projected and accumulated benefit obligation	$	50,097	$	64,273
Fair value of plan assets		30,843		45,378

Schedule of Net Benefit Costs [Table Text Block]

(In Thousands)	Year Ended December 31,
	2023			2022			2021
Interest cost	$	2,873		$	2,313		$	2,168
Expected return on plan assets		(2,111	)		(3,006	)		(2,174	)
Amortization of net actuarial losses		(146	)		63			145
Settlement/curtailment loss		(2,177	)		—			—
Net periodic pension cost	$	(1,561	)	$	(630	)	$	139

Schedule of Amounts Recognized in Other Comprehensive Income (Loss) [Table Text Block]

	Pension Benefits
(In Thousands)	Year Ended December 31,
	2023		2022			2021
Total net (gain) loss recognized in other comprehensive (income) loss	$	3,522	$	(6,404	)	$	(3,472	)

Defined Benefit Plan, Assumptions [Table Text Block]

	Pension Benefits
	2023			2022
Discount rate		5.5	%		2.9	%
Expected long-term rate of return on assets		6.4	%		5.5	%

Schedule of Expected Benefit Payments [Table Text Block]

	Pension
Year ending December 31, (In Thousands)	Benefits
2024	$	4,710
2025		4,648
2026		4,567
2027		4,466
2028		4,360
2029 – 2033		19,834
Total 10-year estimated future benefit payments	$	42,585