Net Periodic Benefit Expense - Defined Benefit Pension Plans (Tables)

6 Months Ended

Jun. 27, 2020

Defined Benefit Plan, Net Periodic Benefit Cost (Credit) [Abstract]

Schedule of defined benefit pension plans, components of pension expense [Table Text Block]

The results of operations included the following net periodic benefit expense (income) recognized related to our defined-benefit pension plans.

	Three Months Ended					Six Months Ended
	June 27, 2020		June 29, 2019			June 27, 2020		June 29, 2019
Components of pension expense (income)
Service costs--increase in benefit obligation earned	$	—	$	30		$	—	$	75
Interest cost on projected benefit obligation	27		61			53		136
Expected return on plan assets	—		(14		)	—		(37		)
Settlement loss	—		1,677			—		1,677
Amortization of net actuarial loss	22		31			44		75
Amortization of prior service cost	16		16			32		32
Net pension expense of defined benefit pension plans	$	65	$	1,801		$	129	$	1,958