Pensions - Narrative (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Gain due to settlement	$ 390	$ 0	$ 390	$ 15
Remeasurement gain	8,692	0	8,692	164
Qualified Plan | Pension Plan
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Contribution costs	7,500	10,000	15,000	15,000
Expected future employer contribution, current fiscal year	30,000		30,000
Nonqualified Plan | Pension Plan
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Contribution costs	100	$ 200	300	$ 900
Expected future employer contribution, current fiscal year	$ 600		$ 600