Note 8 - Accrued Retirement Benefits

3 Months Ended

Mar. 31, 2018

Notes to Financial Statements

Pension and Other Postretirement Benefits Disclosure [Text Block]

8 . ACCRUED RETIREMENT BENEFITS

Accrued retirement benefits at

March 31, 2018

and

December 31, 2017

consisted of the following:

	March 31			December 31,
	2018			2017
	(in thousands)
Defined benefit pension plans	$	5,706		$	5,812
Non-qualified retirement plans		2,243			2,219
Total		7,949			8,031
Less current portion		(169	)		(164	)
Non-current portion of accrued retirement benefits	$	7,780		$	7,867

The net periodic benefit costs for pension and postretirement benefits for the

three

months ended

March 31, 2018

and

2017

were as follows:

	Three Months
	Ended March 31,
	2018			2017
	(in thousands)
Interest cost	$	495		$	557
Expected return on plan assets		(578	)		(562	)
Amortization of net loss		185			207
Pension and other postretirement expenses	$	102		$	202