Retirement Benefit Plans (Tables)

3 Months Ended

Mar. 31, 2022

Retirement Benefits [Abstract]

Summary of Net Periodic Benefit Cost

The following table summarizes the components of net periodic benefit (income) cost:

	Three months ended March 31,
	2022						2021
(In thousands)	Pension Plan		SERP		OPEB		Pension Plan		SERP		OPEB
Service cost	$	—	$	—	$	6	$	—	$	—	$	—
Interest cost	$	1,377	$	15	$	144	$	1,166	$	7	$	4
Expected return on plan assets	(3,669)		—		—		(3,595)		—		—
Amortization of actuarial loss (gain)	422		7		(18)		1,019		8		(20)
Net periodic benefit (income) cost	$	(1,870)	$	22	$	132	$	(1,410)	$	15	$	(16)