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

3 Months Ended

Mar. 28, 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
	March 28, 2020		March 30, 2019
Components of pension expense (income)
Service costs--increase in benefit obligation earned	$	—	$	45
Interest cost on projected benefit obligation	26		75
Expected return on plan assets	—		(23		)
Amortization of net actuarial loss	22		44
Amortization of prior service cost	16		16
Net pension expense of defined benefit pension plans	$	64	$	157