Retirement Benefit Plans

3 Months Ended

Mar. 31, 2023

Retirement Benefits [Abstract]

Retirement Benefit Plans

Retirement Benefit Plans

Defined Benefit Pension and Other Postretirement Benefits

The following tables summarize the components of net periodic benefit cost (income):

	Three months ended March 31,
	2023						2022
(In thousands)	Pension		SERP		OPEB		Pension		SERP		OPEB
Service cost	$	—	$	—	$	7	$	—	$	—	$	6
Interest cost	2,211		67		380		1,377		15		144
Expected return on plan assets	(2,699)		—		—		(3,669)		—		—
Amortization of actuarial loss (gain)	1,216		1		(675)		422		7		(18)
Net periodic benefit cost (income)	$	728	$	68	$	(288)	$	(1,870)	$	22	$	132

The components of net periodic benefit cost (income) are included in Other expense on the accompanying Condensed Consolidated Statements of Income. The weighted-average expected long-term rate of return on plan assets for the three months ended March 31, 2023, was 5.50%, as determined at the beginning of the year.