Note 16 - Benefit Plans (Tables)

12 Months Ended

Dec. 31, 2019

Notes Tables

Schedule of Defined Benefit Plans Disclosures [Table Text Block]

	Year Ended December 31,
	2019			2018
Accumulated benefit obligation at end of period	$	-		$	65,978
Change in projected benefit obligation
Projected benefit obligation at beginning of period	$	65,978		$	72,631
Interest cost		2,401			2,575
Net actuarial (gain) loss		3,452			(6,820	)
Benefits paid		(31,321	)		(2,408	)
Annuities purchased		(40,510	)		-
Projected benefit obligation at end of period	$	-		$	65,978
Change in plan assets
Fair value of plan assets at beginning of period	$	61,870		$	58,014
Actual return on plan assets		8,944			(3,507	)
Company contributions		1,017			9,771
Benefits paid		(31,321	)		(2,408	)
Annuities purchased		(40,510	)		-
Fair value of plan assets at end of period	$	-		$	61,870
Funded status: accrued pension liability included in other long-term liabilities	$	-		$	(4,108	)
Amounts recognized in accumulated other comprehensive loss
Net actuarial loss, net of tax	$	-		$	(10,541	)

Defined Benefit Plan, Weighted Average Assumptions Used in Calculating Benefit Obligation [Table Text Block]

	2019		2018
Weighted average discount rate		N/A		4.24%

Schedule of Net Benefit Costs [Table Text Block]

	Year Ended December 31,
	2019			2018			2017
Interest cost	$	2,401		$	2,575		$	2,688
Expected return on plan assets		(3,500	)		(3,525	)		(3,011	)
Amortization of net loss		843			802			883
Loss on pension settlement		10,920			-			-
Net periodic pension cost (benefit)	$	10,664		$	(148	)	$	560

Schedule of Allocation of Plan Assets [Table Text Block]

	Target Allocation						December 31, 2018
Asset Category	Minimum			Maximum			Dollars		%
Fixed income		15.0	%		25.0	%	$	12,257		20	%
Domestic equity		36.5	%		61.5	%		30,731		50	%
International equity		17.0	%		25.0	%		12,380		20	%
Real estate		7.0	%		15.0	%		6,502		10	%
Total								61,870		100	%

Schedule of Fair Value of Plan Assets [Table Text Block]

	Total		Quoted Prices in Active Markets for Identical Asset (Level 1)		Significant Observable Inputs (Level 2)		Significant Unobservable Inputs (Level 3)
Mutual funds	$	51,736	$	51,736	$	–	$	–
Other investments		10,134		–		–		10,134
Total	$	61,870	$	51,736	$	–	$	10,134

Schedule of Effect of Significant Unobservable Inputs, Changes in Plan Assets [Table Text Block]

	Year Ended December 31,
	2018
Balance at beginning of period	$	9,700
Purchases		3,805
Redemptions		(3,795	)
Realized gains		424
Balance at end of period	$	10,134

Net periodic Benefit Costs [Member]

Notes Tables

Defined Benefit Plan, Assumptions [Table Text Block]

	Year Ended December 31,
	2019		2018		2017
Discount Rate		4.24%		3.60%		4.14%
Expected long-term rate of return on plan assets		6.60%		6.19%		6.58%
Rate of compensation increase (1)		N/A		N/A		N/A