Employee Benefits (Tables)

6 Months Ended

Jun. 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 June 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
Six Months Ended June 30,	2023		2022		2023		2022
Net periodic benefit cost
Service cost	$	1,909	$	2,240	$	—	$	—
Interest cost	5,053		3,865		—		1
Expected return on plan assets	(7,513)		(9,445)		—		—
Amortization of prior service credit	(1,640)		(1,640)		—		(7,543)
Amortization of net loss	104		388		—		1,412
Special event plan closure	—		—		—		—
Net periodic benefit cost	$	(2,087)	$	(4,591)	$	—	$	(6,129)