Pensions - Cash Contributions to Plans (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Defined Benefit Plan, Plan Assets, Category [Line Items]
Plan contributions	$ 23,242	$ 36,185
Qualified plans | Pension Plan
Defined Benefit Plan, Plan Assets, Category [Line Items]
Plan contributions	22,500	35,000	$ 43,875
Non-qualified plans | Pension Plan
Defined Benefit Plan, Plan Assets, Category [Line Items]
Plan contributions	$ 742	$ 1,176	$ 1,034