Postretirement Benefits (Tables)

9 Months Ended

Sep. 30, 2020

Retirement Benefits [Abstract]

Schedule of Cost of Pension Plans

The cost of our pension plans are as follows:

	Three months ended September 30,				Nine months ended September 30,
(in thousands)	2020		2019		2020		2019
Service cost for benefits earned	$	10,873	$	8,463	$	32,620	$	25,390
Interest cost on benefits obligation	9,395		9,827		28,184		29,480
Expected return on plan assets	(12,353)		(11,872)		(37,059)		(35,614)
Prior service cost amortization	336		349		1,007		1,046
Net actuarial loss amortization	3,031		1,279		9,093		3,835
Pension plan cost (1)	$	11,282	$	8,046	$	33,845	$	24,137

(1)The components of pension plan costs other than the service cost component are included in the line item "Other (expense) income" in the Statements of Operations after reimbursements from the Exchange and its subsidiaries.