Postretirement Benefits (Tables)

6 Months Ended

Jun. 30, 2022

Retirement Benefits [Abstract]

Schedule of Cost of Pension Plans

The cost of our pension plans are as follows:

	Three months ended June 30,				Six months ended June 30,
(in thousands)	2022		2021		2022		2021
Service cost for benefits earned	$	12,561	$	13,260	$	25,121	$	26,520
Interest cost on benefits obligation	9,941		9,206		19,882		18,412
Expected return on plan assets	(13,639)		(12,568)		(27,278)		(25,137)
Prior service cost amortization	360		357		721		714
Net actuarial loss amortization	1,830		4,026		3,660		8,053
Pension plan cost (1)	$	11,053	$	14,281	$	22,106	$	28,562

(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.