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EMPLOYEE BENEFIT PLANS (Tables)
 6 Months Ended
Jun. 30, 2019
Retirement Benefits [Abstract]  
Schedule of severance pay details
The severance pay detail is as follows:
 
June 30, 2019
 
December 31, 2018
 
(in thousands)
Accrued severance liabilities
$
6,778

 
$
21,645

Severance assets
5,428

 
17,043

Unfunded portion
$
1,350

 
$
4,602