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Employee Benefit Plans (Tables)
9 Months Ended
Sep. 30, 2018
Retirement Benefits [Abstract]  
Schedule of Net Benefit Costs
Net Periodic Benefit
 
Pension Benefits
Other
 Postretirement
 Benefits
 
Three Months Ended September 30,
Three Months Ended September 30,
 
2018
2017
2018
2017
Service cost
$
1

$
1

$

$

Interest cost
36

36

1

2

Expected return on plan assets
(57
)
(55
)
(2
)
(2
)
Amortization of prior service credit


(2
)
(2
)
Amortization of actuarial loss
12

11

2

1

Settlements




Net periodic benefit
$
(8
)
$
(7
)
$
(1
)
$
(1
)

Net Periodic Cost (Benefit)
 
Pension Benefits
Other  Postretirement  Benefits
 
Nine months ended September 30,
Nine months ended September 30,
 
2018
2017
2018
2017
Service cost
$
3

$
3

$

$
6

Interest cost
107

134

4

(6
)
Expected return on plan assets
(172
)
(214
)
(5
)
(5
)
Amortization of prior service credit


(5
)

Amortization of actuarial loss
37

41

5

4

Settlements

750



Net periodic cost (benefit)
$
(25
)
$
714

$
(1
)
$
(1
)