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Postretirement Benefit Obligations
 6 Months Ended
Jun. 30, 2017
Retirement Benefits [Abstract]  
Postretirement Benefit Cost
Postretirement Benefit Cost
 
The components of net periodic benefit cost of the Company’s pension plan are as follows:
 
Three Months Ended
June 30,
 
Six Months Ended
June 30,
 
2017
 
2016
 
2017
 
2016
Service costs
$
1,908

 
$
—

 
$
3,816

 
$
—

Interest costs
333

 
—

 
666

 
—

Expected return on plan assets
(76
)
 
—

 
(152
)
 
—

Other (1)
—

 
1,717

 
—

 
3,434

Net periodic benefit cost
$
2,165

 
$
1,717

 
$
4,330

 
$
3,434

 
(1)
Prior to the Spin-Off, certain of our employees participated in a defined benefit pension plan (“Shared Plan”) sponsored by Honeywell which included participants of other Honeywell subsidiaries and operations. Net periodic benefit cost related to participation in the Shared Plan was $1.7 million and $3.4 million for the three and six months ended June 30, 2016, respectively.

The Company plans to make contributions during 2017 sufficient to satisfy pension funding requirements under the AdvanSix Retirement Earnings Plan in an aggregate amount of approximately $17 million as well as additional contributions in future years sufficient to satisfy pension funding requirements in those periods. Of the approximately $17 million of planned contributions for 2017, the Company has made contributions of $2.2 million in January 2017, $1.6 million in April 2017 and $1.9 million in July 2017.