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Transactions with Affiliates (Tables)
 12 Months Ended
Dec. 31, 2016
Transactions with Affiliates [Abstract]  
Schedule of activities with affiliates
Activities with affiliates were as follows (in thousands):

  
2016
  
2015
  
2014
 
Overhead recoveries
 
$
32
  
$
97
  
$
151
 
Affiliate billings to Company
 
$
65
  
$
68
  
$
65
 
Company billings to affiliate
 
$
5
  
$
35
  
$
42
 
Rentals paid to affiliate
 
$
628
  
$
618
  
$
607
 
Fee paid to Bencap
 
$
583
  
$
-
  
$
-