Pension and Other Postretirement Benefit Plans - Schedule of Fair Value of Plan Assets (Details) - USD ($) $ in Thousands	Dec. 31, 2022	Dec. 31, 2021
Defined Benefit Plan Disclosure [Line Items]
Other postretirement benefit plan assets	$ 540,225	$ 733,966
Level 1
Defined Benefit Plan Disclosure [Line Items]
Other postretirement benefit plan assets	101	102
Level 2
Defined Benefit Plan Disclosure [Line Items]
Other postretirement benefit plan assets	0	0
Level 3
Defined Benefit Plan Disclosure [Line Items]
Other postretirement benefit plan assets	0	0
Defined Benefit Plan, Cash and Cash Equivalents
Defined Benefit Plan Disclosure [Line Items]
Other postretirement benefit plan assets	101	102
Defined Benefit Plan, Cash and Cash Equivalents | Level 1
Defined Benefit Plan Disclosure [Line Items]
Other postretirement benefit plan assets	101	102
Defined Benefit Plan, Cash and Cash Equivalents | Level 2
Defined Benefit Plan Disclosure [Line Items]
Other postretirement benefit plan assets	0	0
Defined Benefit Plan, Cash and Cash Equivalents | Level 3
Defined Benefit Plan Disclosure [Line Items]
Other postretirement benefit plan assets	0	0
Private Equity Funds
Defined Benefit Plan Disclosure [Line Items]
Other postretirement benefit plan assets	540,124	733,864
Private Equity Funds | Level 1
Defined Benefit Plan Disclosure [Line Items]
Other postretirement benefit plan assets	0	0
Private Equity Funds | Level 2
Defined Benefit Plan Disclosure [Line Items]
Other postretirement benefit plan assets	0	0
Private Equity Funds | Level 3
Defined Benefit Plan Disclosure [Line Items]
Other postretirement benefit plan assets	$ 0	$ 0