Pension and Other Post Retirement Benefits - Change In Benefit Obligation and Plan Assets (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Change in benefit obligation
Employee contributions	$ 0	$ 20
Benefits paid	(12,117)	(11,181)
Change in plan assets
Fair value of plan assets at beginning of year	189,535	294,566
Actual return on plan assets	9,114	(80,267)
Employer contributions	4,333	5,861
Employee contributions	0	20
Plan settlements	0	(1,726)
Benefits paid	(12,117)	(11,181)
Plan expenses and premiums paid	0	(66)
Currency translation adjustment	5,489	(17,672)
Fair value of plan assets at end of year	196,354	189,535	$ 294,566
Amounts recognized in the balance sheet consist of:
Non-current assets	3,879	8,639
Current liabilities	(2,208)	(1,560)
Non-current liabilities	(29,457)	(28,765)
Pension Benefits
Change in benefit obligation
Gross benefit obligation at beginning of year	209,640	332,172
Service cost	427	512	1,245
Interest cost	9,932	5,224	4,331
Employee contributions	0	20
Effect of plan amendments	(15)	303
Curtailment (gain) loss	(213)	207
Plan settlements	0	(1,726)
Benefits paid	(12,117)	(11,181)
Plan expenses and premiums paid	0	(66)
Actuarial loss (gain)	9,955	(97,932)
Translation differences and other	6,233	(17,893)
Gross benefit obligation at end of year	223,842	209,640	332,172
Change in plan assets
Employee contributions	0	20
Benefits paid	(12,117)	(11,181)
Net benefit obligation recognized	(27,488)	(20,105)
Amounts recognized in the balance sheet consist of:
Non-current assets	2,834	8,639
Current liabilities	(2,030)	(1,338)
Non-current liabilities	(28,292)	(27,406)
Net benefit obligation recognized	(27,488)	(20,105)
Prior service (cost) credit	(353)	(369)
Accumulated (loss) gain	(16,869)	(7,855)
AOCI	(17,222)	(8,224)
Cumulative employer contributions in excess of or (below) net periodic benefit cost	(10,266)	(11,881)
Other Postretirement Benefits
Change in benefit obligation
Curtailment (gain) loss	0
Foreign
Change in benefit obligation
Employee contributions	0	20
Benefits paid	(6,086)	(5,343)
Change in plan assets
Fair value of plan assets at beginning of year	129,944	216,886
Actual return on plan assets	4,474	(65,396)
Employer contributions	1,566	3,241
Employee contributions	0	20
Plan settlements	0	(1,726)
Benefits paid	(6,086)	(5,343)
Plan expenses and premiums paid	0	(66)
Currency translation adjustment	5,489	(17,672)
Fair value of plan assets at end of year	135,387	129,944	216,886
Foreign | Pension Benefits
Change in benefit obligation
Gross benefit obligation at beginning of year	130,554	228,752
Service cost	399	465	698
Interest cost	6,083	3,079	2,594
Employee contributions	0	20
Effect of plan amendments	0	303
Curtailment (gain) loss	(213)	207
Plan settlements	0	(1,726)
Benefits paid	(6,086)	(5,343)
Plan expenses and premiums paid	0	(66)
Actuarial loss (gain)	7,809	(77,244)
Translation differences and other	6,233	(17,893)
Gross benefit obligation at end of year	144,779	130,554	228,752
Change in plan assets
Employee contributions	0	20
Benefits paid	(6,086)	(5,343)
Net benefit obligation recognized	(9,392)	(610)
Amounts recognized in the balance sheet consist of:
Non-current assets	2,834	8,639
Current liabilities	(273)	(210)
Non-current liabilities	(11,953)	(9,039)
Net benefit obligation recognized	(9,392)	(610)
Prior service (cost) credit	(353)	(333)
Accumulated (loss) gain	(19,117)	(10,387)
AOCI	(19,470)	(10,720)
Cumulative employer contributions in excess of or (below) net periodic benefit cost	10,078	10,110
U.S.
Change in benefit obligation
Employee contributions	0	0
Benefits paid	(6,031)	(5,838)
Change in plan assets
Fair value of plan assets at beginning of year	59,591	77,680
Actual return on plan assets	4,640	(14,871)
Employer contributions	2,767	2,620
Employee contributions	0	0
Plan settlements	0	0
Benefits paid	(6,031)	(5,838)
Plan expenses and premiums paid	0	0
Currency translation adjustment	0	0
Fair value of plan assets at end of year	60,967	59,591	77,680
U.S. | Pension Benefits
Change in benefit obligation
Gross benefit obligation at beginning of year	79,086	103,420
Service cost	28	47	547
Interest cost	3,849	2,145	1,737
Employee contributions	0	0
Effect of plan amendments	(15)	0
Curtailment (gain) loss	0	0
Plan settlements	0	0
Benefits paid	(6,031)	(5,838)
Plan expenses and premiums paid	0	0
Actuarial loss (gain)	2,146	(20,688)
Translation differences and other	0	0
Gross benefit obligation at end of year	79,063	79,086	103,420
Change in plan assets
Employee contributions	0	0
Benefits paid	(6,031)	(5,838)
Net benefit obligation recognized	(18,096)	(19,495)
Amounts recognized in the balance sheet consist of:
Non-current assets	0	0
Current liabilities	(1,757)	(1,128)
Non-current liabilities	(16,339)	(18,367)
Net benefit obligation recognized	(18,096)	(19,495)
Prior service (cost) credit	0	(36)
Accumulated (loss) gain	2,248	2,532
AOCI	2,248	2,496
Cumulative employer contributions in excess of or (below) net periodic benefit cost	(20,344)	(21,991)
U.S. | Other Postretirement Benefits
Change in benefit obligation
Gross benefit obligation at beginning of year	1,606	2,010
Service cost	0	0	1
Interest cost	69	37	27
Employee contributions	0	0
Effect of plan amendments	0	(2)
Curtailment (gain) loss		0
Plan settlements	0	0
Benefits paid	(182)	(176)
Plan expenses and premiums paid	0	0
Actuarial loss (gain)	(150)	(263)
Translation differences and other	0	0
Gross benefit obligation at end of year	1,343	1,606	2,010
Change in plan assets
Fair value of plan assets at beginning of year	0	0
Actual return on plan assets	0	0
Employer contributions	182	176
Employee contributions	0	0
Plan settlements	0	0
Benefits paid	(182)	(176)
Plan expenses and premiums paid	0	0
Currency translation adjustment	0	0
Fair value of plan assets at end of year	0	0	$ 0
Net benefit obligation recognized	(1,343)	(1,606)
Amounts recognized in the balance sheet consist of:
Non-current assets	0	0
Current liabilities	(178)	(222)
Non-current liabilities	(1,165)	(1,384)
Net benefit obligation recognized	(1,343)	(1,606)
Prior service (cost) credit	0	16
Accumulated (loss) gain	1,241	1,218
AOCI	1,241	1,234
Cumulative employer contributions in excess of or (below) net periodic benefit cost	$ (2,584)	$ (2,840)