Defined Benefit Plans (Tables)

9 Months Ended

Sep. 30, 2020

Retirement Benefits [Abstract]

Net Periodic Cost (Benefit)

The components of the combined net periodic expense (benefit) for our defined benefit pension plans are presented in the table below.

	Three Months Ended September 30,				Nine Months Ended September 30,
	2020		2019		2020		2019
Expected return on plan assets, net of expenses	$	(3,073)	$	(2,693)	$	(9,217)	$	(8,079)
Interest cost on projected benefit obligation	1,252		1,618		3,757		4,854
Net amortization and deferral	1,330		1,406		3,989		4,218
Net periodic expense (benefit)	$	(491)	$	331	$	(1,471)	$	993