Pension and Postretirement Plans (Tables)

3 Months Ended

Mar. 31, 2022

Defined Benefit Pension Plan [Member]

Schedule of Net Benefit Costs

The total benefit arising from the Company’s defined benefit pension plans consists of the following components:

	Three Months Ended   March 31
(in thousands)	2022		2021
Service cost	$	6,031	$	5,602
Interest cost	7,670		6,654
Expected return on assets	(41,963)		(34,576)
Amortization of prior service cost	709		711
Recognized actuarial gain	(17,229)		(2,892)
Net Periodic Benefit	$	(44,782)	$	(24,501)

Schedule of Allocation of Plan Assets

The assets of the Company’s pension plans were allocated as follows:

	As of
	March 31, 2022		December 31, 2021
U.S. equities	63	%	61	%
Private investment funds	17	%	17	%
U.S. stock index fund	7	%	9	%
International equities	7	%	9	%
U.S. fixed income	6	%	4	%
	100	%	100	%

Supplemental Executive Retirement Plan (SERP) [Member]

Schedule of Net Benefit Costs

The total cost arising from the Company’s Supplemental Executive Retirement Plan (SERP) consists of the following components:

	Three Months Ended   March 31
(in thousands)	2022		2021
Service cost	$	228	$	255
Interest cost	822		736
Amortization of prior service cost	9		83
Recognized actuarial loss	166		1,482
Net Periodic Cost	$	1,225	$	2,556

Other Postretirement Benefit Plan, Defined Benefit [Member]

Schedule of Net Benefit Costs

Other Postretirement Plans. The total cost arising from the Company’s other postretirement plans consists of the following components:

	Three Months Ended   March 31
(in thousands)	2022		2021
Interest cost	$	24	$	36
Amortization of prior service credit	(2)		(2)
Recognized actuarial gain	(711)		(1,019)
Net Periodic Benefit	$	(689)	$	(985)