Retirement Plans and Postretirement Medical Benefits (Other Changes in Plan Assets and Benefit Obligations) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021
Nonpension postretirement benefit plans
Defined Benefit Plan Disclosure [Line Items]
Net actuarial loss (gain)	$ (31,512)	$ (22,305)
Amortization of net actuarial loss	(68)	(4,090)
Amortization of prior service credit (cost)	0	(129)
Total recognized in other comprehensive income	(31,580)	(26,524)
United States | Pension Benefits
Defined Benefit Plan Disclosure [Line Items]
Net actuarial loss (gain)	15,788	(27,842)
Amortization of net actuarial loss	(33,164)	(38,233)
Amortization of prior service credit (cost)	44	60
Settlements	(394)	(551)
Total recognized in other comprehensive income	(17,726)	(66,566)
Foreign | Pension Benefits
Defined Benefit Plan Disclosure [Line Items]
Net actuarial loss (gain)	2,607	(23,257)
Amortization of net actuarial loss	(6,767)	(9,350)
Amortization of prior service credit (cost)	(252)	(268)
Settlements	0	0
Total recognized in other comprehensive income	$ (4,412)	$ (32,875)