Note 8 - Accrued Retirement Benefits (Tables)

6 Months Ended

Jun. 30, 2019

Notes Tables

Schedule of Defined Benefit Plans Disclosures [Table Text Block]

	June 30			December 31,
	2019			2018
	(in thousands)
Defined benefit pension plan	$	8,003		$	7,971
Non-qualified retirement plans		2,048			2,065
Total		10,051			10,036
Less current portion		(165	)		(165	)
Non-current portion of accrued retirement benefits	$	9,886		$	9,871

Schedule of Net Benefit Costs [Table Text Block]

	Three Months						Six Months
	Ended June 30,						Ended June 30,
	2019			2018			2019			2018
	(in thousands)						(in thousands)
Interest cost	$	527		$	495		$	1,053		$	990
Expected return on plan assets		(482	)		(578	)		(967	)		(1,156	)
Amortization of net loss		211			185			423			370
Pension and other postretirement expenses	$	256		$	102		$	509		$	204