Note 4 - Employee Benefit Plans (Tables)

3 Months Ended

Mar. 31, 2023

Table Text Block [Abstract]

Schedule of Net Benefit Costs [Table Text Block]

We sponsor three defined benefit pension plans covering substantially all U.S. employees. Net periodic pension cost for the plans consisted of the following for the three months ended March 31, 2023 and 2022 (in thousands):

	Three Months Ended March 31,
	2023			2022
Service cost	$	949		$	1,566
Interest cost		1,993			1,369
Expected return on plan assets		(3,107	)		(3,363	)
Amortization of prior service cost		125			128
Amortization of net loss		(47	)		512
Net periodic pension (benefit) cost	$	(87	)	$	212