Note 8 - Benefit Plans (Tables)

12 Months Ended

Dec. 31, 2017

Notes Tables

Schedule of Defined Benefit Plans Disclosures [Table Text Block]

(In thousands )	December 31,
	201 7			201 6
Changes in benefit obligatio n
Benefit obligation at beginning of yea r	$	25,258		$	24,790
Service cos t		65			57
Interest cos t		965			988
Actuarial los s		3,755			1,288
Benefits pai d		(1,657	)		(1,865	)
Benefit obligation at end of yea r		28,386			25,258
Changes in plan asset s
Fair value of plan assets at beginning of yea r		15,791			15,865
Actual return on asset s		2,413			1,291
Employer contribution s		5,598			500
Benefits pai d		(1,657	)		(1,865	)
Fair value of plan assets at end of yea r		22,145			15,791
Funded status at end of yea r	$	(6,241	)	$	(9,467	)
Amounts recognized in consolidated balance sheet
Other asset s	$	2,181		$	-
Other current liabilitie s		(103	)		-
Long-term pension liabilit y		(8,319	)		(9,467	)
		(6,241	)		(9,467	)
Amounts recognized in accumulated other comprehensive income consist of :
Net actuarial los s	$	10,903		$	9,819

Schedule of Accumulated Benefit Obligations in Excess of Fair Value of Plan Assets [Table Text Block]

	December 31 ,
	201 7			201 6
Projected benefit obligatio n	$	28,386		$	25,258
Fair value of plan asset s		(22,145	)		(15,791	)
	$	6,241		$	9,467

Schedule of Net Benefit Costs [Table Text Block]

	201 7			201 6			201 5
Service cost - benefits earned during the perio d	$	65		$	57		$	48
Interest cost on projected benefit obligatio n		965			988			951
Expected return on plan asset s		(1,218	)		(1,188	)		(1,343	)
Recognized actuarial los s		1,042			1,027			772
Settlement los s		435			445			460
Net periodic pension cost after settlement s	$	1,289		$	1,329		$	888

Schedule of Assumptions Used [Table Text Block]

							Long Term Rat e
	Discount Rate						of Retur n						Salary Scale
	Corp.			Plants			Corp.			Plants			Corp.		Plants
2016		4.04	%		3.91	%		8.00	%		8.00	%		N/A		N/A
2017		3.53	%		3.45	%		8.00	%		8.00	%		N/A		N/A

							Long Term Rate
	Discount Rate						of Retur n						Salary Scale
	Corp.			Plants			Corp.			Plant s			Corp.		Plants
2015		3.86	%		3.74	%		8.00	%		8.00	%		N/A		N/A
2016		4.19	%		4.09	%		8.00	%		8.00	%		N/A		N/A
2017		4.04	%		3.91	%		8.00	%		8.00	%		N/A		N/A

Schedule of Allocation of Plan Assets [Table Text Block]

	Percentage of Plan Assets at December 31,						Target Allocation
Investment description	201 7			201 6			201 8
Equity securities		52	%		68	%		52	%
Fixed income		29	%		13	%		29	%
Other		19	%		19	%		19	%
Total		100	%		100	%		100	%

Schedule of Expected Benefit Payments [Table Text Block]

Year	Projected Benefit Payments
	(in thousands)
2018	$	1,467
2019	$	1,652
2020	$	2,135
2021	$	1,947
2022	$	1,979
202 3-2027	$	8,620