Pension and Other Post-Retirement Benefit Plans - Fair Value of Plan Assets (Details) - Pension Plans - USD ($) $ in Thousands	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Fair Value, Recurring
Defined Benefit Plan Disclosure [Line Items]
Plan assets	$ 627,032	$ 850,195	$ 843,895
Level 1
Defined Benefit Plan Disclosure [Line Items]
Plan assets	0	0
Level 2
Defined Benefit Plan Disclosure [Line Items]
Plan assets	627,029	850,192
Total
Defined Benefit Plan Disclosure [Line Items]
Plan assets	627,029	850,192
Common trust funds | Level 1
Defined Benefit Plan Disclosure [Line Items]
Plan assets	0	0
Common trust funds | Level 2
Defined Benefit Plan Disclosure [Line Items]
Plan assets	19,114	29,451
Common trust funds | Total
Defined Benefit Plan Disclosure [Line Items]
Plan assets	19,114	29,451
Mutual funds | Level 1
Defined Benefit Plan Disclosure [Line Items]
Plan assets	0	0
Mutual funds | Level 2
Defined Benefit Plan Disclosure [Line Items]
Plan assets	166,143	236,647
Mutual funds | Total
Defined Benefit Plan Disclosure [Line Items]
Plan assets	166,143	236,647
Fixed income investments | Level 1
Defined Benefit Plan Disclosure [Line Items]
Plan assets	0	0
Fixed income investments | Level 2
Defined Benefit Plan Disclosure [Line Items]
Plan assets	441,772	584,094
Fixed income investments | Total
Defined Benefit Plan Disclosure [Line Items]
Plan assets	441,772	584,094
Investments measured at net asset value ("NAV")
Defined Benefit Plan Disclosure [Line Items]
Plan assets	$ 3	$ 3