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Pension and Other Post-Retirement Benefit Plans
 9 Months Ended
Sep. 30, 2017
Retirement Benefits [Abstract]  
PENSION AND OTHER POST-RETIREMENT BENEFIT PLANS
PENSION AND OTHER POST-RETIREMENT BENEFIT PLANS
The following table provides the components of net periodic cost for the Company’s pension, deferred compensation and executive supplemental life insurance retirement plans:
 
Three Months Ended
 
Nine Months Ended
 
September 30, 2017
 
September 24, 2016
 
September 30, 2017
 
September 24, 2016
 
(in thousands)
Service cost
$
749


$
655

 
$
2,277

 
$
1,848

Interest cost
2,663


2,773

 
8,428

 
9,357

Expected return on plan assets
(3,476
)

(3,038
)
 
(10,411
)
 
(11,028
)
Amortization of prior service credit
(134
)

(142
)
 
(392
)
 
(430
)
Amortization of net loss
1,017


503

 
3,030

 
1,594

Settlements
—

 
788

 
—

 
788

Net periodic cost
$
819

 
$
1,539

 
$
2,932

 
$
2,129


The net periodic cost for the Company’s post-retirement benefit plan for the three and nine months ended September 30, 2017 and September 24, 2016 was not significant.