Pension and Other Post-Retirement Benefit Plans - Level Three Defined Benefit Plan Assets Roll Forward (Details) - Pension Plans - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020
Fair Value, Recurring
Schedule of Level Three Defined Benefit Plan Assets [Roll Forward]
Plan assets, beginning balance	$ 843,895
Plan assets, ending balance	850,195	$ 843,895
Fair Value | Fair Value, Recurring
Schedule of Level Three Defined Benefit Plan Assets [Roll Forward]
Plan assets, beginning balance	3
Plan assets, ending balance	$ 3	$ 3
Hedge Funds & Private Equity
Schedule of Level Three Defined Benefit Plan Assets [Roll Forward]
Redemption Notice Period	90 days	90 days
Hedge Funds & Private Equity | Fair Value | Fair Value, Recurring
Schedule of Level Three Defined Benefit Plan Assets [Roll Forward]
Plan assets, beginning balance	$ 3
Plan assets, ending balance	$ 3	$ 3
Real Estate
Schedule of Level Three Defined Benefit Plan Assets [Roll Forward]
Redemption Notice Period	90 days	90 days
Real Estate | Fair Value | Fair Value, Recurring
Schedule of Level Three Defined Benefit Plan Assets [Roll Forward]
Plan assets, beginning balance	$ 0
Plan assets, ending balance	$ 0	$ 0