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Benefit Plans (Tables)
9 Months Ended
Sep. 30, 2018
Retirement Benefits [Abstract]  
Components of Company Plan Benefit Expense
The following table summarizes key information related to the Company’s pension plans and retirement agreements (in thousands):  
 
Nine Months Ended September 30, 2018
 
Year Ended December 31, 2017
Change in Projected Benefit Obligation
 
 
 
Projected benefit obligation, beginning of period
$
32,820

 
$
28,624

Service cost
900

 
1,001

Interest cost
931

 
1,228

Actuarial loss

 
2,474

Benefits paid
(396
)
 
(507
)
Projected benefit obligation, end of period
$
34,255

 
$
32,820

Change in Plan Assets
 
 
 
Plan assets at fair value, beginning of period
$

 
$

Company contributions
396

 
507

Benefits paid
(396
)
 
(507
)
Plan assets at fair value, end of period
$

 
$

Unfunded Status of the Plan
$
(34,255
)
 
$
(32,820
)
Components of Net Periodic Benefit Cost
 
Three Months Ended
 
Nine Months Ended
 
September 30, 2018
 
September 30, 2017
 
September 30, 2018
 
September 30, 2017
Components of Net Periodic Benefit Cost
 
 
 
 
 
 
 
Service cost
$
300

 
$
250

 
$
900

 
$
751

Interest cost
310

 
307

 
931

 
921

Net loss
133

 
73

 
399

 
218

Net periodic pension cost
$
743

 
$
630

 
$
2,230

 
$
1,890