Quarterly report pursuant to Section 13 or 15(d)

Postretirement Benefits

v3.7.0.1
Postretirement Benefits
3 Months Ended
Mar. 31, 2017
Compensation and Retirement Disclosure [Abstract]  
Postretirement Benefits
Postretirement Benefits
The components of net periodic benefit cost related to our benefit plans for the three months ended March 31, 2017 and 2016 consisted of the following:
 
For the Three Months Ended
 
March 31,
 
2017
 
2016
Components of net periodic benefit cost:
 
 
 
Service cost
$
976

 
$
952

Interest cost
1,395

 
1,409

Expected return on plan assets
(1,549
)
 
(1,749
)
Amortization of net loss
775

 
806

Net periodic benefit cost
$
1,597

 
$
1,418


Our estimated contributions to our pension plans during 2017 have not changed significantly from amounts previously disclosed in the notes to the consolidated financial statements for the year ended December 31, 2016. For the three months ended March 31, 2017, we made no contributions to our qualified pension plans. For the three months ended March 31, 2016, we contributed $1,181 to our qualified pension plans.