Pension Plans and Other Postretirement Benefits Reconciliation of Benefit Obligations, Plan Assets and Funded Status of Plans, as well as Summary of Significant Assumptions for Benefit Plans (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Pension Plans
Change in plan assets:
Fair value of plan assets, beginning balance	$ 683,469
Fair value of plan assets, Ending Balance	700,247	$ 683,469
Other Postretirement Benefits
Change in benefit obligations:
Benefit obligation, beginning balance	51,343	55,089
Service cost	123	105	$ 98
Interest cost	1,238	1,871	2,197
Actuarial loss	(2,568)	(2,571)
Benefits paid	(2,643)	(3,151)
Benefit obligation, ending balance	47,493	51,343	55,089
Change in plan assets:
Fair value of plan assets, beginning balance	0	0
Defined Benefit Plan, Plan Assets, Contributions by Employer	2,643	3,151
Benefits paid	(2,643)	(3,151)
Fair value of plan assets, Ending Balance	0	0	0
Funded status	(47,493)	(51,343)
Current liabilities (accrued expenses)	(3,800)	(3,268)
Noncurrent liabilities (pension benefits)	(43,693)	(48,075)
Net pension liability	$ (47,493)	$ (51,343)
Weighted-average assumptions used to determine benefit obligations at December 31:
Discount rate	2.85%	2.49%
Rate of compensation increase	3.50%	3.50%
U.S. Plans | Pension Plans
Change in benefit obligations:
Benefit obligation, beginning balance	$ 740,951	$ 678,720
Service cost	869	849	730
Interest cost	18,005	23,402	28,199
Plan amendments	0	0
Actuarial loss	(24,576)	79,780
Benefits paid	(54,553)	(41,800)
Employee contributions	0	0
Foreign exchange loss (gain)	0	0
Settlements/curtailments	0	0
Other	0	0
Benefit obligation, ending balance	680,696	740,951	678,720
Change in plan assets:
Fair value of plan assets, beginning balance	594,228	556,683
Actual return on plan assets	50,256	75,715
Defined Benefit Plan, Plan Assets, Contributions by Employer	16,060	3,630
Benefits paid	(54,553)	(41,800)
Employee contributions	0	0
Foreign exchange gain	0	0
Settlements/curtailments	0	0
Other	0	0
Fair value of plan assets, Ending Balance	605,991	594,228	$ 556,683
Funded status	(74,705)	(146,723)
Current liabilities (accrued expenses)	(525)	(1,217)
Noncurrent liabilities (pension benefits)	(74,180)	(145,506)
Net pension liability	(74,705)	(146,723)
Prior service benefit	0	0
Net amount recognized	$ 0	$ 0
Weighted-average assumptions used to determine benefit obligations at December 31:
Discount rate	2.86%	2.50%	3.56%	4.59%
Rate of compensation increase	0.00%	0.00%
Foreign Plans | Pension Plans
Change in benefit obligations:
Benefit obligation, beginning balance	$ 290,385	$ 258,374
Service cost	3,697	4,000	$ 3,680
Interest cost	2,427	3,357	4,998
Plan amendments	0	593
Actuarial loss	(14,769)	19,571
Benefits paid	(10,451)	(9,905)
Employee contributions	78	101
Foreign exchange loss (gain)	(14,080)	19,858
Settlements/curtailments	(1,998)	(5,866)
Other	(55)	302
Benefit obligation, ending balance	255,234	290,385	258,374
Change in plan assets:
Fair value of plan assets, beginning balance	89,241	81,466
Actual return on plan assets	7,305	8,173
Defined Benefit Plan, Plan Assets, Contributions by Employer	11,550	9,653
Benefits paid	(10,451)	(9,905)
Employee contributions	78	101
Foreign exchange gain	(1,419)	4,110
Settlements/curtailments	(1,998)	(4,279)
Other	(50)	(78)
Fair value of plan assets, Ending Balance	94,256	89,241	$ 81,466
Funded status	(160,978)	(201,144)
Current liabilities (accrued expenses)	(5,972)	(5,832)
Noncurrent liabilities (pension benefits)	(155,006)	(195,312)
Net pension liability	(160,978)	(201,144)
Prior service benefit	(773)	(433)
Net amount recognized	$ (773)	$ (433)
Weighted-average assumptions used to determine benefit obligations at December 31:
Discount rate	1.44%	0.86%	1.33%	2.15%
Rate of compensation increase	3.20%	3.82%