Annual report pursuant to Section 13 and 15(d)

Benefit Plans - Change in Benefit Obligation and Plan Assets (Details)

v3.19.3.a.u2
Benefit Plans - Change in Benefit Obligation and Plan Assets (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2019
Dec. 31, 2018
Dec. 31, 2017
Defined Benefit Pension Plans      
Defined Benefit Plan, Change in Benefit Obligation      
Actuarial (gains) losses   $ 18,436  
Changes in actuarial (gains) losses due to discount rates   17,085  
Defined Benefit Plan, Change in Fair Value of Plan Assets      
Fair value of plan assets at beginning of period $ 287,542    
Fair value of plan assets at end of the period 337,599 287,542  
Defined Benefit Pension Plans | United States      
Defined Benefit Plan, Change in Benefit Obligation      
Benefit obligation at beginning of period 246,311 261,102  
Service cost 978 1,019 $ 1,219
Interest cost 10,281 9,599 10,115
Participant contributions 0 0  
Plan amendments 0 0  
Plan curtailments (2,795) (952)  
Plan settlements (1,669) 0  
Benefits paid (10,862) (11,453)  
Expenses paid 0 0  
Net transfer in 0 0  
Actuarial (gains) losses 25,148 (13,004)  
Translation adjustment 0 0  
Benefit obligation at end of the period 267,392 246,311 261,102
Changes in actuarial (gains) losses due to discount rates 26,604    
Changes in actuarial (gains) losses due to demographic experience 2,953    
Changes in actuarial (gains) losses due to mortality assumptions 4,409    
Defined Benefit Plan, Change in Fair Value of Plan Assets      
Fair value of plan assets at beginning of period 195,755 218,374  
Actual return on plan assets 43,116 (12,854)  
Employer contributions 5,073 1,688  
Employee contributions 0 0  
Plan settlements (1,669) 0  
Benefits paid (10,862) (11,453)  
Expenses paid 0 0  
Acquisitions 0 0  
Translation adjustment 0 0  
Fair value of plan assets at end of the period 231,413 195,755 218,374
Funded status of the plans (underfunded) (35,979) (50,556)  
Defined Benefit Plan, Accumulated Benefit Obligation 266,992 244,580  
Defined Benefit Pension Plans | Foreign      
Defined Benefit Plan, Change in Benefit Obligation      
Benefit obligation at beginning of period 112,103 119,710  
Service cost 3,382 3,566 3,686
Interest cost 3,290 3,340 3,271
Participant contributions 555 570  
Plan amendments 0 179  
Plan curtailments 0 (340)  
Plan settlements (642) (1,071)  
Benefits paid (2,478) (2,569)  
Expenses paid (328) (363)  
Net transfer in 0 1,535  
Actuarial (gains) losses 16,186 (5,432)  
Translation adjustment (589) (7,022)  
Benefit obligation at end of the period 131,479 112,103 119,710
Changes in actuarial (gains) losses due to discount rates 17,998    
Changes in actuarial (gains) losses due to demographic experience 1,263    
Changes in actuarial (gains) losses due to mortality assumptions 549    
Defined Benefit Plan, Change in Fair Value of Plan Assets      
Fair value of plan assets at beginning of period 91,787 96,518  
Actual return on plan assets 13,421 (540)  
Employer contributions 3,941 4,249  
Employee contributions 555 570  
Plan settlements (642) (1,071)  
Benefits paid (2,478) (2,569)  
Expenses paid (328) (363)  
Acquisitions 0 1,013  
Translation adjustment (70) (6,020)  
Fair value of plan assets at end of the period 106,186 91,787 96,518
Funded status of the plans (underfunded) (25,293) (20,316)  
Defined Benefit Plan, Accumulated Benefit Obligation 126,518 107,910  
Underfunded and Unfunded Plans      
Defined Benefit Plan, Change in Fair Value of Plan Assets      
Funded status of the plans (underfunded) 77,801 87,410  
Supplemental Retirement Plans      
Defined Benefit Plan, Change in Benefit Obligation      
Benefit obligation at beginning of period 11,868 12,781  
Interest cost 465 450 489
Benefits paid (1,045) (1,070)  
Actuarial (gains) losses 364 (293)  
Benefit obligation at end of the period 11,652 11,868 12,781
Changes in actuarial (gains) losses due to discount rates 971    
Changes in actuarial (gains) losses due to demographic experience 281    
Changes in actuarial (gains) losses due to mortality assumptions 326    
Defined Benefit Plan, Change in Fair Value of Plan Assets      
Fair value of plan assets at beginning of period 0 0  
Employer contributions 1,045 1,070  
Benefits paid (1,045) (1,070)  
Fair value of plan assets at end of the period 0 0 0
Funded status of the plans (underfunded) (11,652) (11,868)  
Defined Benefit Plan, Accumulated Benefit Obligation 11,652 11,868  
Other Postretirement Benefits Plans      
Defined Benefit Plan, Change in Benefit Obligation      
Benefit obligation at beginning of period 3,814 4,612  
Service cost 10 16 21
Interest cost 152 150 174
Participant contributions 253 251  
Plan amendments (460) (271)  
Benefits paid (751) (1,061)  
Medical subsidies received 0 74  
Premiums paid 7 66  
Actuarial (gains) losses 412 172  
Translation adjustment 29 (63)  
Benefit obligation at end of the period 3,452 3,814 4,612
Changes in actuarial (gains) losses due to discount rates 334    
Changes in actuarial (gains) losses due to demographic experience 172    
Changes in actuarial (gains) losses due to mortality assumptions 94    
Defined Benefit Plan, Change in Fair Value of Plan Assets      
Fair value of plan assets at beginning of period 0 0  
Employer contributions 505 802  
Employee contributions 253 251  
Benefits paid (751) (1,061)  
Medical subsidies received 0 74  
Premiums paid 7 66  
Fair value of plan assets at end of the period 0 0 $ 0
Funded status of the plans (underfunded) $ (3,452) $ (3,814)