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Pension and Other Postretirement Benefits (Tables)
 9 Months Ended
Sep. 30, 2017
Retirement Benefits [Abstract]  
Schedule of Net Benefit Costs
Pension and other postretirement benefits expenses consisted of the following:
 
Three months ended September 30,
 
Nine months ended September 30,
Pensions
2017
 
2016
 
2017
 
2016
Service cost
$
1,572

 
$
1,354

 
$
4,674

 
$
4,056

Interest cost
4,764

 
4,869

 
14,051

 
14,650

Expected return on plan assets
(7,206
)
 
(7,564
)
 
(20,882
)
 
(22,774
)
Amortization of prior service cost
110

 
52

 
330

 
157

Amortization of actuarial losses
2,703

 
2,697

 
7,846

 
8,109

Curtailment gain
—

 
—

 
(7,217
)
 
—

Settlement loss (gain)
298

 
—

 
(193
)
 
—

Net periodic benefit cost
$
2,241

 
$
1,408

 
$
(1,391
)
 
$
4,198

 
 
 
 
 
 
 
 

In June 2017, the Company authorized the closure of its FOBOHA facility located in Muri, Switzerland which resulted in pension curtailment and settlement gains of $7,217 and $230, respectively, during the second quarter of 2017. See Note 14 of the Consolidated Financial Statements for additional information related to the Closure.

In May 2017, the Company contributed $5,000 of discretionary contributions to its U.S Qualified pension plans. The Company currently does not plan to make any additional discretionary contributions to its U.S. Qualified pension plans, however approximately $5,000 is expected to be made into its U.S. Non-qualified and international pension plans throughout 2017.

 
Three months ended September 30,
 
Nine months ended September 30,
Other Postretirement Benefits
2017
 
2016
 
2017
 
2016
Service cost
$
20

 
$
31

 
$
62

 
$
92

Interest cost
389

 
440

 
1,170

 
1,324

Amortization of prior service credit
(17
)
 
(93
)
 
(51
)
 
(280
)
Amortization of actuarial losses
68

 
134

 
207

 
401

Net periodic benefit cost
$
460

 
$
512

 
$
1,388

 
$
1,537