Note 4 - Employee Benefit Plans (Tables)

6 Months Ended

Jun. 30, 2023

Table Text Block [Abstract]

Schedule of Net Benefit Costs [Table Text Block]

We sponsor three defined benefit pension plans, two of which cover substantially all U.S. employees. Net periodic pension cost for the plans consisted of the following for the three and six months ended June 30, 2023 and 2022 (in thousands):

	Three Months Ended June 30,						Six Months Ended June 30,
	2023			2022			2023			2022
Service cost	$	949		$	1,566		$	1,898		$	3,131
Interest cost		1,993			1,369			3,986			2,738
Expected return on plan assets		(3,107	)		(3,363	)		(6,214	)		(6,726	)
Amortization of prior service cost		125			128			250			256
Amortization of net loss		(47	)		512			(94	)		1,024
Net periodic pension (benefit) cost	$	(87	)	$	212		$	(174	)	$	423