Retirement Plans and Postretirement Medical Benefits (Benefit Obligations and Funded Status) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Pension Benefits | United States
Defined Benefit Plan Disclosure [Line Items]
Accumulated benefit obligation	$ 1,001,801	$ 1,205,108
Projected benefit obligation
Benefit obligation - beginning of year	1,205,140	1,205,183
Service cost	49	44	$ 55
Interest cost	58,131	63,533	44,348
Net actuarial (gain) loss	(39,337)	36,882
Foreign currency changes	0	0
Settlements	(140,356)	(2,892)
Benefits paid	(81,816)	(97,610)
Benefit obligation - end of year	1,001,811	1,205,140	1,205,183
Fair value of plan assets
Fair value of plan assets - beginning of year	1,153,490	1,161,361
Actual return on plan assets	22,920	86,044
Company contributions	4,574	6,587
Settlements	(140,356)	(2,892)
Foreign currency changes	0	0
Benefits paid	(81,816)	(97,610)
Fair value of plan assets - end of year	958,812	1,153,490	1,161,361
Amounts recognized in the Consolidated Balance Sheets
Noncurrent asset	0	0
Current liability	(4,606)	(5,057)
Noncurrent liability	(38,393)	(46,593)
Funded status	(42,999)	(51,650)
Pension Benefits | Foreign
Defined Benefit Plan Disclosure [Line Items]
Accumulated benefit obligation	447,127	488,531
Projected benefit obligation
Benefit obligation - beginning of year	492,767	451,337
Service cost	745	766	1,214
Interest cost	20,815	21,238	13,568
Net actuarial (gain) loss	(15,310)	22,984
Foreign currency changes	(15,591)	19,854
Settlements	(7,861)	(213)
Benefits paid	(24,825)	(23,199)
Benefit obligation - end of year	450,740	492,767	451,337
Fair value of plan assets
Fair value of plan assets - beginning of year	466,687	438,403
Actual return on plan assets	(19,217)	17,057
Company contributions	7,881	16,034
Settlements	(7,861)	(213)
Foreign currency changes	(14,460)	18,605
Benefits paid	(24,825)	(23,199)
Fair value of plan assets - end of year	408,205	466,687	438,403
Amounts recognized in the Consolidated Balance Sheets
Noncurrent asset	26,502	27,805
Current liability	(1,664)	(1,694)
Noncurrent liability	(67,373)	(52,191)
Funded status	(42,535)	(26,080)
Nonpension postretirement benefit plans
Projected benefit obligation
Benefit obligation - beginning of year	93,487	99,275
Service cost	369	367	731
Interest cost	4,479	5,031	3,679
Net actuarial (gain) loss	(5,603)	(206)
Foreign currency changes	(633)	214
Benefits paid	(12,452)	(11,194)
Benefit obligation - end of year	79,647	93,487	99,275
Fair value of plan assets
Fair value of plan assets - beginning of year	0	0
Company contributions	12,452	11,194
Benefits paid	(12,452)	(11,194)
Fair value of plan assets - end of year	0	0	$ 0
Amounts recognized in the Consolidated Balance Sheets
Current liability	(9,257)	(10,265)
Noncurrent liability	(70,390)	(83,222)
Funded status	(79,647)	(93,487)
Nonpension postretirement benefit plans | United States
Projected benefit obligation
Benefit obligation - beginning of year	84,000
Benefit obligation - end of year	$ 73,000	$ 84,000