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Pension and Other Postretirement Benefits (Tables)
 6 Months Ended
Jun. 30, 2018
Retirement Benefits [Abstract]  
Pension and Other Postretirement Benefits
The components of net periodic cost for the Company’s pension and postretirement benefit plans were as follows:
 
Pension Benefits
 
Postretirement Benefits
Three Months Ended June 30,
2018
 
2017
 
2018
 
2017
Components of net periodic cost:
 
 
 
 
 
 
 
Service cost
$
8

 
$
8

 
$
—

 
$
—

Interest cost
37

 
47

 
4

 
5

Expected return on plan assets
(45
)
 
(51
)
 
—

 
—

Amortization of actuarial loss (gain) (a)
24

 
26

 
(4
)
 
(6
)
Net periodic cost
$
24

 
$
30

 
$
—

 
$
(1
)
 
Pension Benefits
 
Postretirement Benefits
Six Months Ended June 30,
2018

2017

2018

2017
Components of net periodic cost:
 
 
 
 
 
 
 
Service cost
$
16

 
$
15

 
$
—

 
$
—

Interest cost
74

 
95

 
8

 
9

Expected return on plan assets
(90
)
 
(101
)
 
—

 
—

Amortization of actuarial loss (gain) (a)
48

 
51

 
(9
)
 
(11
)
Net periodic cost
$
48

 
$
60

 
$
(1
)
 
$
(2
)

(a) Reflects amounts reclassified from accumulated other comprehensive loss to net earnings (loss).