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Employee Benefit Plans
 3 Months Ended
Mar. 31, 2019
Retirement Benefits [Abstract]  
Employee Benefit Plans Employee Benefit Plans

The net periodic pension cost for the Corporation’s Defined Benefit Pension Plan ("Pension Plan") consisted of the following components:
 
Three months ended March 31
 
2019
 
2018
 
        (in thousands)
Interest cost
$
815

 
$
831

Expected return on plan assets
(689
)
 
(451
)
Net amortization and deferral
495

 
664

Net periodic pension cost
$
621

 
$
1,044


The components of the net benefit for the Corporation’s Postretirement Benefits Plan ("Postretirement Plan") consisted of the following components:
 
Three months ended March 31
 
2019
 
2018
 
        (in thousands)
Interest cost
$
15

 
$
17

Net accretion and deferral
(139
)
 
(141
)
Net periodic benefit
$
(124
)
 
$
(124
)

The Corporation recognizes the funded status of its Pension Plan and Postretirement Plan on the consolidated balance sheets and recognizes the change in that funded status through other comprehensive income.