Employee Benefits (Tables)

9 Months Ended

Sep. 30, 2023

Retirement Benefits [Abstract]

Summary of Components of Net Periodic Benefit Cost

The components of the net periodic benefit cost for our pension and postretirement benefit plans are as follows:

	Pension Plan				Postretirement Benefit Plan
Three Months Ended September 30,	2023		2022		2023		2022
Net periodic benefit cost
Service cost	$	954	$	1,120	$	—	$	—
Interest cost	2,526		1,933		—		1
Expected return on plan assets	(3,756)		(4,723)		—		—
Amortization of prior service credit	(820)		(820)		—		(3,771)
Amortization of net loss	52		194		—		706
Net periodic benefit cost	$	(1,044)	$	(2,296)	$	—	$	(3,064)

	Pension Plan				Postretirement Benefit Plan
Nine Months Ended September 30,	2023		2022		2023		2022
Net periodic benefit cost
Service cost	$	2,863	$	3,361	$	—	$	—
Interest cost	7,579		5,798		—		2
Expected return on plan assets	(11,269)		(14,168)		—		—
Amortization of prior service credit	(2,460)		(2,460)		—		(11,314)
Amortization of net loss	155		583		—		2,118
Net periodic benefit cost	$	(3,131)	$	(6,887)	$	—	$	(9,194)