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Employee Benefit Plans (Tables)
 9 Months Ended
Sep. 30, 2019
Pension Benefits  
Employee Benefit Plans [Line Items]  
Schedule of Defined Benefit Plans Disclosures

The following are components of the net periodic benefit cost for the pension and postretirement benefit plans maintained by the Company for the three and nine months ended September 30, 2019 and 2018:
 
Pension Benefits
(in thousands)
Three months ended September 30,
 
Nine months ended September 30,
2019
 
2018
 
2019
 
2018
Interest cost
$
29

 
$
33

 
$
87

 
$
98

Recognized net actuarial loss
58

 
61

 
174

 
183

Benefit cost
$
87

 
$
94

 
$
261

 
$
281
Postretirement Benefits  
Employee Benefit Plans [Line Items]  
Schedule of Defined Benefit Plans Disclosures
 
Postretirement Benefits
(in thousands)
Three months ended September 30,
 
Nine months ended September 30,
2019
 
2018
 
2019
 
2018
Service cost
$
68

 
$
81

 
$
206

 
$
243

Interest cost
214

 
188

 
641

 
565

Amortization of prior service cost
(228
)
 
(227
)
 
(684
)
 
(683
)
Benefit cost
$
54

 
$
42

 
$
163

 
$
125