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EMPLOYEE BENEFIT PLANS (Tables)
 6 Months Ended
Jun. 30, 2018
Retirement Benefits [Abstract]  
Schedule of Defined Benefit Plans Disclosures [Table Text Block] The components of net periodic pension cost consisted of the following for the periods set forth below (amounts in thousands):
 
Three months ended
 
Six months ended
 
June 30,
 
June 30,
 
2018
 
2017
 
2018
 
2017
Service cost
$
141

 
$
128

 
$
278

 
$
353

Interest cost
1,098

 
1,163

 
2,181

 
2,334

Expected return on assets
(1,491
)
 
(1,368
)
 
(2,983
)
 
(2,737
)
Amortization of unrecognized prior service cost
50

 
34

 
100

 
68

Amortization of net unrecognized loss
690

 
655

 
1,366

 
1,329

      Net periodic pension cost
$
488

 
$
612

 
$
942

 
$
1,347