Retirement Plans and Postretirement Medical Benefits (Benefit Obligations and Funded Status) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2025	Dec. 31, 2024	Dec. 31, 2023
Pension Benefits | United States
Defined Benefit Plan Disclosure [Line Items]
Accumulated benefit obligation	$ 991,154	$ 1,001,801
Projected benefit obligation
Benefit obligation - beginning of year	1,001,811	1,205,140
Service cost	25	49	$ 44
Interest cost	53,485	58,131	63,533
Net actuarial (gain) loss	32,303	(39,337)
Foreign currency changes	0	0
Settlements	0	(140,356)
Benefits paid	(96,470)	(81,816)
Benefit obligation - end of year	991,154	1,001,811	1,205,140
Fair value of plan assets
Fair value of plan assets - beginning of year	958,812	1,153,490
Actual return on plan assets	72,960	22,920
Company contributions	5,626	4,574
Settlements	0	(140,356)
Foreign currency changes	0	0
Benefits paid	(96,470)	(81,816)
Fair value of plan assets - end of year	940,928	958,812	1,153,490
Amounts recognized in the Consolidated Balance Sheets
Noncurrent asset	0	0
Current liability	(19,776)	(4,606)
Noncurrent liability	(30,449)	(38,393)
Funded status	(50,225)	(42,999)
Pension Benefits | Foreign
Defined Benefit Plan Disclosure [Line Items]
Accumulated benefit obligation	462,726	447,127
Projected benefit obligation
Benefit obligation - beginning of year	450,740	492,767
Service cost	1,143	745	766
Interest cost	23,477	20,815	21,238
Net actuarial (gain) loss	(12,056)	(15,310)
Foreign currency changes	33,545	(15,591)
Settlements	(1,122)	(7,861)
Benefits paid	(29,541)	(24,825)
Benefit obligation - end of year	466,186	450,740	492,767
Fair value of plan assets
Fair value of plan assets - beginning of year	408,205	466,687
Actual return on plan assets	11,951	(19,217)
Company contributions	8,645	7,881
Settlements	(1,122)	(7,861)
Foreign currency changes	27,707	(14,460)
Benefits paid	(29,541)	(24,825)
Fair value of plan assets - end of year	425,845	408,205	466,687
Amounts recognized in the Consolidated Balance Sheets
Noncurrent asset	25,479	26,502
Current liability	(1,855)	(1,664)
Noncurrent liability	(63,965)	(67,373)
Funded status	(40,341)	(42,535)
Nonpension postretirement benefit plans
Projected benefit obligation
Benefit obligation - beginning of year	79,647	93,487
Service cost	273	369	367
Interest cost	4,159	4,479	5,031
Net actuarial (gain) loss	2,630	(5,603)
Foreign currency changes	295	(633)
Benefits paid	(10,806)	(12,452)
Benefit obligation - end of year	76,198	79,647	93,487
Fair value of plan assets
Fair value of plan assets - beginning of year	0	0
Company contributions	10,806	12,452
Benefits paid	(10,806)	(12,452)
Fair value of plan assets - end of year	0	0	$ 0
Amounts recognized in the Consolidated Balance Sheets
Current liability	(8,865)	(9,257)
Noncurrent liability	(67,334)	(70,390)
Funded status	(76,199)	(79,647)
Nonpension postretirement benefit plans | United States
Projected benefit obligation
Benefit obligation - beginning of year	73,000
Benefit obligation - end of year	$ 70,000	$ 73,000