Retirement Benefit Plans (Tables)

9 Months Ended

Sep. 30, 2020

Retirement Benefits [Abstract]

Summary of Net Periodic Benefit Cost

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

	Three months ended September 30,
	2020						2019
(In thousands)	Pension Plan		SERP		Other Benefits		Pension Plan		SERP		Other Benefits
Interest cost on benefit obligations	$	1,531	$	12	$	9	$	2,001	$	16	$	22
Expected return on plan assets	(3,380)		—		—		(2,815)		—		—
Recognized net loss	1,036		5		(38)		1,420		4		(2)
Net periodic benefit cost	$	(813)	$	17	$	(29)	$	606	$	20	$	20

	Nine months ended September 30,
	2020						2019
(In thousands)	Pension Plan		SERP		Other Benefits		Pension Plan		SERP		Other Benefits
Interest cost on benefit obligations	$	4,881	$	35	$	34	$	5,956	$	48	$	64
Expected return on plan assets	(10,140)		—		—		(8,445)		—		—
Recognized net loss	3,021		17		(55)		4,280		11		(10)
Net periodic benefit cost	$	(2,238)	$	52	$	(21)	$	1,791	$	59	$	54