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Pension Plans and Postretirement Benefits
 9 Months Ended
Sep. 30, 2019
Retirement Benefits [Abstract]  
Pension Plans and Postretirement Benefits Pension Plans and Postretirement Benefits

Net periodic benefit expense for the United States plans:

Three months ended September 30, 2019
 
Three months ended September 30, 2018
 
Pension benefits
 
Other benefits
 
Total
 
Pension benefits
 
Other benefits
 
Total
Service cost
$
—

 
$
36

 
$
36

 
$
—

 
$
36

 
$
36

Interest cost
25

 
34

 
59

 
24

 
29

 
53

Expected return on assets
(40
)
 
—

 
(40
)
 
(38
)
 
—

 
(38
)
Amortization of
 
 
 
 
 
 
 
 
 
 
 
prior service cost
—

 
—

 
—

 
—

 
—

 
—

unrecognized (gain) loss
—

 
(40
)
 
(40
)
 
—

 
(39
)
 
(39
)
net transition obligation
—

 
—

 
—

 
—

 
—

 
—

Net periodic (benefit) cost
$
(15
)
 
$
30

 
$
15

 
$
(14
)
 
$
26

 
$
12

 
 
 
 
 
 
 
 
 
 
 
 
 
Nine Months Ended September 30, 2019
 
Nine Months Ended September 30, 2018
 
Pension benefits
 
Other benefits
 
Total
 
Pension benefits
 
Other benefits
 
Total
Service cost
$
—

 
$
108

 
$
108

 
$
—

 
$
109

 
$
109

Interest cost
76

 
102

 
178

 
71

 
87

 
158

Expected return on assets
(119
)
 
—

 
(119
)
 
(113
)
 
—

 
(113
)
Amortization of
 
 
 
 
 
 
 
 
 
 
 
prior service cost
—

 
—

 
—

 
—

 
—

 
—

unrecognized (gain) loss
—

 
(118
)
 
(118
)
 
—

 
(119
)
 
(119
)
net transition obligation
—

 
—

 
—

 
—

 
—

 
—

Net periodic cost
$
(43
)
 
$
92

 
$
49

 
$
(42
)
 
$
77

 
$
35


Innophos has no minimum contribution requirements and does not plan to make cash contributions for its U.S. defined benefit pension plan in 2019.
Innophos had no minimum contribution requirements and did not make cash contributions for its U.S. defined benefit pension plan in 2018.

Net periodic benefit expense for the Canadian plans:
 
Three months ended September 30, 2019
 
Three months ended September 30, 2018
 
Pension benefits
 
Other benefits
 
Total
 
Pension benefits
 
Other benefits
 
Total
Service cost
$
95

 
$
16

 
$
111

 
$
110

 
$
15

 
$
125

Interest cost
134

 
15

 
149

 
128

 
14

 
142

Expected return on assets
(202
)
 
—

 
(202
)
 
(199
)
 
—

 
(199
)
Amortization of
 
 
 
 
 
 
 
 
 
 
 
actuarial loss (gain)
52

 
—

 
52

 
47

 
1

 
48

prior service cost
13

 
—

 
13

 
13

 
—

 
13

net transition obligation
—

 
3

 
3

 
—

 
6

 
6

Exchange rate changes
47

 
(17
)
 
30

 
(97
)
 
32

 
(65
)
Net periodic cost
$
139

 
$
17

 
$
156

 
$
2

 
$
68

 
$
70

 
 
 
 
 
 
 
 
 
 
 
 
 
Nine Months Ended September 30, 2019
 
Nine Months Ended September 30, 2018
 
Pension benefits
 
Other benefits
 
Total
 
Pension benefits
 
Other benefits
 
Total
Service cost
$
285

 
$
46

 
$
331

 
$
332

 
$
47

 
$
379

Interest cost
402

 
45

 
447

 
389

 
43

 
432

Expected return on assets
(605
)
 
—

 
(605
)
 
(602
)
 
—

 
(602
)
Amortization of
 
 
 
 
 
 
 
 
 
 
 
actuarial loss (gain)
154

 
—

 
154

 
142

 
3

 
145

prior service cost
38

 
—

 
38

 
39

 
—

 
39

net transition obligation
—

 
9

 
9

 
—

 
18

 
18

Exchange rate changes
(120
)
 
42

 
(78
)
 
121

 
(41
)
 
80

Net periodic cost
$
154

 
$
142

 
$
296

 
$
421

 
$
70

 
$
491


Innophos Canada, Inc. plans to make cash contributions to its Canadian defined benefit plan of approximately $0.3 million in 2019.
Innophos Canada, Inc. made cash contributions to its Canadian defined benefit plan of approximately $0.7 million in 2018.