Note 8 - Benefit Plans (Tables)

12 Months Ended

Dec. 31, 2019

Notes Tables

Schedule of Defined Benefit Plans Disclosures [Table Text Block]

	December 31,
	2019			2018
Changes in benefit obligation:
Benefit obligation at beginning of year	$	27,125		$	28,386
Service cost		117			108
Interest cost		1,084			970
Actuarial (gain) loss		3,835			(1,597	)
Benefits paid		(3,691	)		(742	)
Benefit obligation at end of year		28,470			27,125
Changes in plan assets:
Fair value of plan assets at beginning of year		19,980			22,145
Actual return on assets		3,547			(1,526	)
Employer contributions		103			103
Benefits paid		(3,691	)		(742	)
Fair value of plan assets at end of year		19,939			19,980
Funded status at end of year	$	(8,531	)	$	(7,145	)
Amounts recognized in balance sheets:
Other assets	$	1,825		$	1,663
Other current liabilities		(103	)		(103	)
Long-term pension liability		(10,253	)		(8,705	)
Net amount recognized	$	(8,531	)	$	(7,145	)
Amounts recognized in accumulated other comprehensive income consist of:
Net actuarial loss	$	10,828		$	11,417

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

	December 31,
	2019			2018
Projected benefit obligation	$	28,470		$	27,125
Fair value of plan assets		(19,939	)		(19,980	)
	$	8,531		$	7,145

Schedule of Net Benefit Costs [Table Text Block]

	Years Ended December 31,
	2019			2018			2017
Service cost - benefits earned during the period	$	117		$	108		$	65
Interest cost on projected benefit obligation		1,084			970			965
Expected return on plan assets		(1,491	)		(1,717	)		(1,218	)
Recognized actuarial loss		1,259			1,132			1,042
Settlement loss		1,110			-			435
Net periodic pension cost after settlements	$	2,079		$	493		$	1,289

Defined Benefit Plan, Assumptions [Table Text Block]

							Long Term Rate
	Discount Rate						of Return						Salary Scale
	Corporate			Plants			Corporate			Plants			Corporate		Plants
2018		4.14	%		4.06	%		8.00	%		8.00	%		N/A		N/A
2019		3.12	%		3.02	%		8.00	%		8.00	%		N/A		N/A

							Long Term Rate
	Discount Rate						of Return						Salary Scale
	Corporate			Plants			Corporate			Plants			Corporate		Plants
2017		4.04	%		3.91	%		8.00	%		8.00	%		N/A		N/A
2018		3.53	%		3.45	%		8.00	%		8.00	%		N/A		N/A
2019		4.14	%		4.06	%		8.00	%		8.00	%		N/A		N/A

Schedule of Allocation of Plan Assets [Table Text Block]

	Percentage of Plan Assets						Target
	December 31,						Allocation
Investment description	2019			2018			2020
Equity securities		68	%		59	%		60	%
Fixed income		31	%		40	%		40	%
Other		1	%		1	%		-	%
Total		100	%		100	%		100	%

Schedule of Expected Benefit Payments [Table Text Block]

Year	Projected Benefit Payments
2020	$	1,115
2021		2,623
2022		1,479
2023		1,795
2024		1,678
2025-2029		7,650