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Pensions and Other Postretirement Benefits (Tables)
 12 Months Ended
Dec. 31, 2017
Defined Benefit Plan Disclosure [Line Items]  
Retirement Plan amounts recorded on consolidated balance sheets
The following table summarizes amounts recorded on the accompanying consolidated balance sheets associated with these various retirement benefit plans:

  
December 31,
 
  
2017
  
2016
 
 
      
Included in "Other assets":
      
Non-U.S. pension plans
 $
347
  $ 
248
 
Total included in other assets
 
$
347
  
$
248
 
Included in "Payroll and related expenses":
        
U.S. pension plans
 
$
(37
)
 
$
(35
)
Non-U.S. pension plans
  
(7,308
)
  
(6,405
)
U.S. other postretirement plans
  
(705
)
  
(717
)
Non-U.S. other postretirement plans
  
(453
)
  
(322
)
Total included in payroll and related expenses
 
$
(8,503
)
 
$
(7,479
)
Accrued pension and other postretirement costs:
        
U.S. pension plans
 
$
(39,880
)
 
$
(38,879
)
Non-U.S. pension plans
  
(213,596
)
  
(194,180
)
U.S. other postretirement plans
  
(6,928
)
  
(6,930
)
Non-U.S. other postretirement plans
  
(7,445
)
  
(6,303
)
Other retirement obligations
  
(13,852
)
  
(11,497
)
Total accrued pension and other postretirement costs
 
$
(281,701
)
 
$
(257,789
)
Accumulated other comprehensive loss:
        
U.S. pension plans
 
$
7,731
  
$
7,313
 
Non-U.S. pension plans
  
88,398
   
82,360
 
U.S. other postretirement plans
  
(1,101
)
  
(2,287
)
Non-U.S. other postretirement plans
  
1,916
   
1,474
 
Total accumulated other comprehensive loss*
 
$
96,944
  
$
88,860
 

* - Amounts included in accumulated other comprehensive loss are presented in this table pre-tax.
Defined Benefit Pension Plans [Member]  
Defined Benefit Plan Disclosure [Line Items]  
Reconciliation of benefit obligation, plan assets, and funded status
The following table sets forth a reconciliation of the benefit obligation, plan assets, and funded status related to U.S. and non-U.S. pension plans:

 
 
December 31, 2017
  
December 31, 2016
 
 
 
U.S.
Plans
  
Non-U.S.
Plans
  
U.S.
Plans
  
Non-U.S.
Plans
 
             
Change in benefit obligation:
            
Benefit obligation at beginning of year
 
$
38,914
  
$
266,427
  
$
274,122
  
$
260,554
 
Service cost
  
-
   
3,725
   
-
   
3,291
 
Interest cost
  
1,643
   
4,866
   
11,788
   
5,475
 
Plan amendments
  
-
   
686
   
-
   
291
 
Transfer from equity affiliate
  
-
   
-
   
-
   
358
 
Actuarial (gains) losses
  
1,149
   
3,019
   
19,916
   
17,202
 
Benefits paid
  
(1,789
)
  
(17,921
)
  
(15,625
)
  
(12,607
)
Curtailments and settlements
  
-
   
-
   
(251,287
)
  
-
 
Currency translation
  
-
   
30,360
   
-
   
(8,137
)
Benefit obligation at end of year
 
$
39,917
  
$
291,162
  
$
38,914
  
$
266,427
 
                 
Change in plan assets:
                
Fair value of plan assets at beginning of year
 
$
-
  
$
66,090
  
$
258,092
   
51,263
 
Actual return on plan assets
  
-
   
1,608
   
14,068
   
2,588
 
Transfer from equity affiliate
  
-
   
-
   
-
   
358
 
Company contributions
  
1,789
   
16,120
   
(5,248
)
  
27,311
 
Benefits paid
  
(1,789
)
  
(17,921
)
  
(15,625
)
  
(12,607
)
Curtailments and settlements
  
-
   
-
   
(251,287
)
  
-
 
Currency translation
  
-
   
4,708
   
-
   
(2,823
)
Fair value of plan assets at end of year
 
$
-
  
$
70,605
  
$
-
  
$
66,090
 
                 
Funded status at end of year
 
$
(39,917
)
 
$
(220,557
)
 
$
(38,914
)
 
$
(200,337
)
Amounts recognized in consolidated balance sheet
Amounts recognized in the accompanying consolidated balance sheets consist of the following:

  
December 31, 2017
  
December 31, 2016
 
  
U.S.
Plans
  
Non-U.S.
Plans
  
U.S.
Plans
  
Non-U.S.
Plans
 
             
Other assets
 
$
-
  
$
347
  
$
-
  
$
248
 
Accrued benefit liability - current
  
(37
)
  
(7,308
)
  
(35
)
  
(6,405
)
Accrued benefit liability - non-current
  
(39,880
)
  
(213,596
)
  
(38,879
)
  
(194,180
)
Accumulated other comprehensive loss
  
7,731
   
88,398
   
7,313
   
82,360
 
 
 
$
(32,186
)
 
$
(132,159
)
 
$
(31,601
)
 
$
(117,977
)
Components of actuarial items
Note 11 – Pensions and Other Postretirement Benefits (continued)

Actuarial items consist of the following:

 
 
December 31, 2017
  
December 31, 2016
 
  
U.S.
Plans
  
Non-U.S.
Plans
  
U.S.
Plans
  
Non-U.S.
Plans
 
             
Unrecognized net actuarial loss
 
$
6,804
  
$
87,896
  
$
6,241
  
$
82,360
 
Unamortized prior service cost
  
927
   
502
   
1,072
   
-
 
 
 
$
7,731
  
$
88,398
  
$
7,313
  
$
82,360
 
Projected and accumulated benefit obligations
The following table sets forth additional information regarding the projected and accumulated benefit obligations:

 
 
December 31, 2017
  
December 31, 2016
 
  
U.S.
Plans
  
Non-U.S.
Plans
  
U.S.
Plans
  
Non-U.S.
Plans
 
             
Accumulated benefit obligation, all plans
 
$
39,917
  
$
270,914
  
$
38,914
  
$
247,838
 
                 
Plans for which the accumulated benefit obligation exceeds plan assets:
                
Projected benefit obligation
 
$
39,917
  
$
277,615
  
$
38,914
  
$
253,390
 
Accumulated benefit obligation
  
39,917
   
262,779
   
38,914
   
240,793
 
Fair value of plan assets
  
-
   
57,727
   
-
   
56,649
 
Components of the net periodic benefit costs
The following table sets forth the components of net periodic pension cost:

 
 
Years ended December 31,
 
 
 
2017
  
2016
  
2015
 
 
 
U.S.
Plans
  
Non-U.S.
Plans
  
U.S.
Plans
  
Non-U.S.
Plans
  
U.S.
Plans
  
Non-U.S.
Plans
 
                   
Service cost net of employee contributions
 
$
-
  
$
3,725
  
$
-
  
$
3,291
  
$
-
  
$
3,265
 
Interest cost
  
1,643
   
4,866
   
11,788
   
5,475
   
11,657
   
5,636
 
Expected return on plan assets
  
-
   
(2,072
)
  
(11,302
)
  
(2,117
)
  
(13,566
)
  
(1,798
)
Amortization of actuarial losses
  
587
   
6,179
   
6,513
   
4,733
   
8,175
   
5,131
 
Amortization of prior service cost (credit)
  
144
   
150
   
144
   
261
   
64
   
(282
)
Curtailment and settlement losses
  
-
   
1,360
   
79,321
   
841
   
-
   
452
 
Net periodic pension cost
 
$
2,374
  
$
14,208
  
$
86,464
  
$
12,484
  
$
6,330
  
$
12,404
 
Weighted average assumptions used
The following weighted average assumptions were used to determine benefit obligations at December 31 of the respective years:

 
 
2017
  
2016
 
  
U.S. Plans
  
Non-U.S. Plans
  
U.S. Plans
  
Non-U.S. Plans
 
Discount rate
  
3.75
%
  
1.80
%
  
4.25
%
  
1.76
%
Rate of compensation increase
  
0.00
%
  
2.10
%
  
0.00
%
  
2.12
%

The following weighted average assumptions were used to determine the net periodic pension costs:

 
 
Years ended December 31,
 
 
 
2017
  
2016
 
 
 
 
U.S. Plans
  
Non-U.S.
Plans
  
U.S. Plans
  
Non-U.S. Plans
 
Discount rate
  
4.25
%
  
1.76
%
  
4.50
%
  
2.30
%
Rate of compensation increase
  
0.00
%
  
2.12
%
  
0.00
%
  
1.99
%
Expected return on plan assets
  
0.00
%
  
2.90
%
  
4.50
%
  
3.38
%
Estimated future benefit payments
Estimated future benefit payments are as follows:

  
U.S.
Plans
  
Non-U.S.
Plans
 
       
2018
 
$
1,802
  
$
17,397
 
2019
  
1,809
   
16,418
 
2020
  
7,880
   
15,958
 
2021
  
3,038
   
15,773
 
2022
  
3,006
   
17,962
 
2023-2027
  
16,904
   
84,438
 
Other Postretirement Benefits [Member]  
Defined Benefit Plan Disclosure [Line Items]  
Reconciliation of benefit obligation, plan assets, and funded status
The following table sets forth a reconciliation of the benefit obligation, plan assets, and accrued benefit cost related to U.S. and non-U.S. non-pension defined benefit postretirement plans:

 
 
December 31, 2017
  
December 31, 2016
 
  
U.S.
Plans
  
Non-U.S. Plans
  
U.S.
Plans
  
Non-U.S. Plans
 
             
Change in benefit obligation:
            
Benefit obligation at beginning of year
 
$
7,647
  
$
6,625
  
$
7,909
  
$
6,488
 
Service cost
  
131
   
273
   
126
   
268
 
Interest cost
  
311
   
103
   
340
   
143
 
Plan curtailments and settlements
  
-
   
-
   
-
   
-
 
Actuarial (gains) losses
  
257
   
312
   
(25
)
  
171
 
Benefits paid
  
(713
)
  
(349
)
  
(703
)
  
(221
)
Currency translation
  
-
   
934
   
-
   
(224
)
Benefit obligation at end of year
 
$
7,633
  
$
7,898
  
$
7,647
  
$
6,625
 
                 
Fair value of plan assets at end of year
 
$
-
  
$
-
  
$
-
  
$
-
 
                 
Funded status at end of year
 
$
(7,633
)
 
$
(7,898
)
 
$
(7,647
)
 
$
(6,625
)
Amounts recognized in consolidated balance sheet
Amounts recognized in the accompanying consolidated balance sheets consist of the following:

 
 
December 31, 2017
  
December 31, 2016
 
  
U.S.
Plans
  
Non-U.S. Plans
  
U.S.
Plans
  
Non-U.S.
Plans
 
             
Accrued benefit liability - current
 
$
(705
)
 
$
(453
)
 
$
(717
)
 
$
(322
)
Accrued benefit liability - non-current
  
(6,928
)
  
(7,445
)
  
(6,930
)
  
(6,303
)
Accumulated other comprehensive income
  
(1,101
)
  
1,916
   
(2,287
)
  
1,474
 
 
 
$
(8,734
)
 
$
(5,982
)
 
$
(9,934
)
 
$
(5,151
)
Components of actuarial items
Note 11 – Pensions and Other Postretirement Benefits (continued)

Actuarial items consist of the following:

 
 
December 31, 2017
  
December 31, 2016
 
  
U.S.
Plans
  
Non-U.S. Plans
  
U.S.
Plans
  
Non-U.S. Plans
 
             
Unrecognized net actuarial loss (gain)
 
$
(953
)
 
$
1,916
  
$
(1,303
)
 
$
1,474
 
Unamortized prior service (credit) cost
  
(148
)
  
-
   
(984
)
  
-
 
 
 
$
(1,101
)
 
$
1,916
  
$
(2,287
)
 
$
1,474
 
Components of the net periodic benefit costs
The following table sets forth the components of net periodic benefit cost:

 
 
Years ended December 31,
 
 
 
2017
  
2016
  
2015
 
  
U.S.
Plans
  
Non-U.S.
Plans
  
U.S.
Plans
  
Non-U.S.
Plans
  
U.S.
Plans
  
Non-U.S.
Plans
 
                   
Service cost
 
$
131
  
$
273
  
$
126
  
$
268
  
$
121
  
$
273
 
Interest cost
  
311
   
103
   
340
   
143
   
333
   
147
 
Amortization of actuarial (gains) losses
  
(93
)
  
76
   
(30
)
  
68
   
90
   
76
 
Amortization of prior service credit
  
(837
)
  
-
   
(837
)
  
-
   
(837
)
  
-
 
Net periodic benefit cost (benefit)
 
$
(488
)
 
$
452
  
$
(401
)
 
$
479
  
$
(293
)
 
$
496
 
Weighted average assumptions used

The following weighted average assumptions were used to determine benefit obligations at December 31 of the respective years:

 
 
2017
  
2016
 
 
 
 
U.S.
Plans
  
Non-U.S.
Plans
  
U.S.
Plans
  
Non-U.S.
Plans
 
             
Discount rate
  
3.75
%
  
1.50
%
  
4.25
%
  
1.50
%
Rate of compensation increase
  
0.00
%
  
2.88
%
  
0.00
%
  
2.58
%

The following weighted average assumptions were used to determine the net periodic benefit costs:

 
 
Years ended December 31,
 
 
 
2017
  
2016
 
 
 
 
U.S.
Plans
  
Non-U.S.
Plans
  
U.S.
Plans
  
Non-U.S.
Plans
 
             
Discount rate
  
4.25
%
  
1.50
%
  
4.50
%
  
2.31
%
Rate of compensation increase
  
0.00
%
  
2.58
%
  
0.00
%
  
2.69
%
Estimated future benefit payments
Note 11 – Pensions and Other Postretirement Benefits (continued)

Estimated future benefit payments are as follows:

  
U.S.
Plans
  
Non-U.S.
Plans
 
       
2018
 
$
705
  
$
453
 
2019
  
703
   
338
 
2020
  
685
   
592
 
2021
  
660
   
494
 
2022
  
632
   
725
 
2023-2027
  
2,472
   
3,161