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EMPLOYEE BENEFIT PLANS (Tables)
3 Months Ended
Mar. 31, 2017
Compensation and Retirement Disclosure [Abstract]  
Schedule of Net Periodic Pension Cost (Credit)
Net periodic pension cost (credit) for the U.K. and Norwegian Plans includes the following components (in thousands):
 
Three Months Ended
March 31,
 
2017
 
2016
 
(unaudited)
 
(unaudited)
Service cost
$
4

 
$
7

Interest cost
579

 
267

Expected return on plan assets
(738
)
 
(273
)
Amortization of net actuarial loss
17

 

Net periodic pension cost (credit)
$
(138
)
 
$
1