Note 10 - Benefit Plans (Tables)

12 Months Ended

Dec. 31, 2022

Notes Tables

Schedule of Defined Benefit Plans Disclosures [Table Text Block]

	December 31,
	2022			2021
	SERP			Pension Plans			SERP			Total
Changes in benefit obligation:
Benefit obligation at beginning of year	$	15,523		$	18,778		$	14,337		$	33,115
Service cost		203			-			185			185
Interest cost		401			171			337			508
Actuarial (gain) loss		(3,031	)		11			767			778
Benefits paid		(103	)		(127	)		(103	)		(230	)
Lump sum benefits paid		-			(17,430	)		-			(17,430	)
Amendments		-			711			-			711
Effect of settlement/curtailment		-			(1,983	)		-			(1,983	)
Benefit obligation at end of year		12,993			131			15,523			15,654
Changes in plan assets:
Fair value of plan assets at beginning of year		-			18,754			-			18,754
Actual return on assets		-			(637	)		-			(637	)
Employer contributions		103			(14	)		103			89
Benefits paid		(103	)		(127	)		(103	)		(230	)
Lump sum benefits paid		-			(17,430	)		-			(17,430	)
Fair value of plan assets at end of year		-			546			-			546
Funded status at end of year	$	(12,993	)	$	415		$	(15,523	)	$	(15,108	)
Amounts recognized in balance sheets:
Other assets	$	-		$	415		$	-		$	415
Other current liabilities		(129	)		-			(103	)		(103	)
Long-term pension liability		(12,864	)		-			(15,420	)		(15,420	)
Net amount recognized	$	(12,993	)	$	415		$	(15,523	)	$	(15,108	)
Amounts recognized in accumulated other comprehensive loss consist of:
Net actuarial loss	$	1,953		$	-		$	6,698		$	6,698

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

	December 31,
	2022		2021
	SERP		Pension Plans			SERP		Total
Projected benefit obligation	$	12,993	$	131		$	15,523	$	15,654
Fair value of plan assets		-		(546	)		-		(546	)
Underfunded (Overfunded)	$	12,993	$	(415	)	$	15,523	$	15,108

Schedule of Net Benefit Costs [Table Text Block]

	Years Ended December 31,
	2022		2021
Interest cost on projected benefit obligation	$	-	$	171
Expected return on plan assets		-		(597	)
Recognized actuarial loss		-		376
Settlement loss		-		-
Pension plan termination charge		-		7,821
Net periodic pension cost after settlements	$	-	$	7,771

	Years Ended December 31,
	2022		2021
Service cost on benefits earned during the period	$	203	$	185
Interest cost on projected benefit obligation		401		337
Recognized actuarial loss		1,715		1,499
Net periodic pension cost after settlements	$	2,319	$	2,021

Defined Benefit Plan, Assumptions [Table Text Block]

	Discount Rate			Long Term Rate of Return		Salary Scale
	SERP			SERP		SERP
2021		2.59	%		N/A		3.00	%
2022		4.93	%		N/A		3.00	%

	Discount Rate							Long Term Rate of Return						Salary Scale
	Pension Plans							Pension Plans						Pension Plans
		Corporate		Plants		SERP			Corporate		Plants		SERP		Corporate	Plants	SERP
2021		2.36	%	2.21	%	2.36	%		8.00	%	8.00	%	N/A		N/A	N/A	3.00	%
2022		N/A		N/A		2.59	%		N/A		N/A		N/A		N/A	N/A	3.00	%

Schedule of Expected Benefit Payments [Table Text Block]

	Projected Benefit Payments
Year	SERP
2023	$	132
2024		1,280
2025		673
2026		695
2027		706
2028-2032		4,916