Employee Benefits (Tables)

9 Months Ended

Sep. 30, 2022

Retirement Benefits [Abstract]

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,	2022		2021		2022		2021
Net periodic benefit cost
Service cost	$	1,120	$	3,020	$	—	$	—
Interest cost	1,933		1,728		1		1
Expected return on plan assets	(4,723)		(4,202)		—		—
Amortization of prior service credit	(820)		(809)		(3,771)		(3,765)
Amortization of net loss	194		999		706		705
Special event plan closure	—		—		—		—
Net periodic benefit cost	$	(2,296)	$	736	$	(3,064)	$	(3,059)

	Pension Plan				Postretirement Benefit Plan
Nine Months Ended September 30,	2022		2021		2022		2021
Net periodic benefit cost
Service cost	$	3,361	$	9,060	$	—	$	148
Interest cost	5,798		5,184		2		71
Expected return on plan assets	(14,168)		(12,606)		—		—
Amortization of prior service credit	(2,460)		(2,427)		(11,314)		(10,725)
Amortization of net loss	583		2,997		2,118		1,902
Special event plan closure	—		—		—		(20,177)
Net periodic benefit cost	$	(6,887)	$	2,208	$	(9,194)	$	(28,781)