Pension and Postretirement Benefit Obligations (Tables)

9 Months Ended

Sep. 30, 2022

Retirement Benefits [Abstract]

Components of Net Periodic Pension Cost and Net Periodic Postretirement Benefit Cost

The components of net periodic pension cost were as follows:

	Third Quarter				First Nine Months
(in thousands)	2022		2021		2022		2021
Service cost	$	1,860	$	1,863	$	5,581	$	5,589
Interest cost	2,659		2,452		7,977		7,360
Expected return on plan assets	(2,036)		(3,250)		(6,107)		(9,748)
Recognized net actuarial loss	989		1,219		2,966		3,654
Amortization of prior service cost	—		1		—		2
Net periodic pension cost	$	3,472	$	2,285	$	10,417	$	6,857

The components of net periodic postretirement benefit cost were as follows:

	Third Quarter				First Nine Months
(in thousands)	2022		2021		2022		2021
Service cost	$	383	$	403	$	1,150	$	1,209
Interest cost	474		447		1,423		1,342
Recognized net actuarial loss	92		186		275		557
Net periodic postretirement benefit cost	$	949	$	1,036	$	2,848	$	3,108