Retirement Benefit Plans (Tables)

3 Months Ended

Mar. 31, 2020

Retirement Benefits [Abstract]

Summary of Net Periodic Benefit Cost

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

	Three months ended March 31,
	2020						2019
(In thousands)	Pension Plan		SERP		Other Benefits		Pension Plan		SERP		Other Benefits
Interest cost on benefit obligations	$	1,675	$	11	$	13	$	1,978	$	16	$	21
Expected return on plan assets	(3,380)		—		—		(2,815)		—		—
Recognized net loss	992		6		(9)		1,430		4		(4)
Net periodic benefit (benefit) cost	$	(713)	$	17	$	4	$	593	$	20	$	17