Pension and Other Postretirement Benefits (Tables)
 9 Months Ended
Sep. 30, 2016
Compensation And Retirement Disclosure [Abstract]  
Schedule of Significant Assumptions of Other Postretirement Benefit Plan

The following table provides the significant assumptions related to the Company’s other postretirement benefit plan:

 

September 30, 2016

 

 

December 31, 2015

 

Weighted-average assumptions used to determine benefit obligations

 

 

 

 

 

 

 

Discount rate

 

3.66%

 

 

 

4.67%

 

Expected return on plan assets

 

5.37%

 

 

 

5.20%

 

Medical trend

6.50% in 2016 and graded from 7.00% in 2017 to 5.00% in 2021+

 

 

graded from 6.50% in 2015 to 5.00% in 2021+

 

 
Components of Net Periodic Benefit Costs

The following table provides the components of net periodic benefit costs:

 

 

For the Three Months Ended

September 30,

 

 

For the Nine Months Ended

September 30,

 

 

2016

 

 

2015

 

 

2016

 

 

2015

 

Components of net periodic pension benefit cost

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Service cost

$

8

 

 

$

9

 

 

$

24

 

 

$

28

 

Interest cost

 

20

 

 

 

19

 

 

 

60

 

 

 

56

 

Expected return on plan assets

 

(24

)

 

 

(24

)

 

 

(72

)

 

 

(73

)

Amortization of actuarial loss

 

7

 

 

 

6

 

 

 

21

 

 

 

19

 

Net periodic pension benefit cost

$

11

 

 

$

10

 

 

$

33

 

 

$

30

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Components of net periodic other postretirement benefit

   cost

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Service cost

$

3

 

 

$

3

 

 

$

9

 

 

$

10

 

Interest cost

 

7

 

 

 

7

 

 

 

22

 

 

 

22

 

Expected return on plan assets

 

(7

)

 

 

(6

)

 

 

(20

)

 

 

(19

)

Amortization of prior service credit

 

(3

)

 

 

—

 

 

 

(4

)

 

 

(1

)

Amortization of actuarial loss

 

1

 

 

 

1

 

 

 

3

 

 

 

4

 

Net periodic other postretirement benefit cost

$

1

 

 

$

5

 

 

$

10

 

 

$

16