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EMPLOYEE BENEFIT PLANS (Tables)
 9 Months Ended
Sep. 30, 2019
Retirement Benefits [Abstract]  
Schedule of Net Periodic Pension Cost (Credit)
Net periodic pension credit includes the following components (in thousands):
 
Three Months Ended September 30,
 
Nine Months Ended September 30,
 
2019
 
2018
 
2019
 
2018
 
(unaudited)
 
(unaudited)
 
(unaudited)
 
(unaudited)
Service cost
$
—

 
$
23

 
$
—

 
$
70

Interest cost
561

 
563

 
1,740

 
1,752

Expected return on plan assets
(574
)
 
(909
)
 
(1,781
)
 
(2,827
)
Amortization of unrecognized prior service cost
8

 
—

 
24

 
—

Net periodic pension credit
$
(5
)
 
$
(323
)
 
$
(17
)
 
$
(1,005
)