Postretirement Benefits (Tables)

3 Months Ended

Mar. 31, 2022

Retirement Benefits [Abstract]

Schedule of Cost of Pension Plans

The cost of our pension plans are as follows:

	Three months ended March 31,
(in thousands)	2022		2021
Service cost for benefits earned	$	12,560	$	13,260
Interest cost on benefits obligation	9,941		9,206
Expected return on plan assets	(13,639)		(12,569)
Prior service cost amortization	361		357
Net actuarial loss amortization	1,830		4,027
Pension plan cost (1)	$	11,053	$	14,281

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