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DESCRIPTION OF BUSINESS AND SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Tables)
 12 Months Ended
Dec. 31, 2017
DESCRIPTION OF BUSINESS AND SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES [Abstract]  
Schedule of earnings and weighted average shares outstanding used in the computation of basic and diluted earnings (loss) per share
The earnings and weighted average shares outstanding used in the computation of basic and diluted earnings per share are as follows:
 
  
2017
  
2016
  
2015
 
Numerator:
         
Net (loss) earnings
 
$
(11,897
)
 
$
(64,834
)
 
$
19,197
 
Less dividends declared:
            
     Class A
  
522
   
522
   
522
 
     Class B
  
2,757
   
2,728
   
2,713
 
Undistributed (loss) earnings
 
$
(15,176
)
 
$
(68,084
)
 
$
15,962
 
             
Undistributed (loss) earnings allocation - basic and diluted:
         
     Class A undistributed (loss) earnings
 
$
(2,635
)
 
$
(11,930
)
 
$
2,809
 
     Class B undistributed (loss) earnings
  
(12,541
)
  
(56,154
)
  
13,153
 
     Total undistributed (loss) earnings
 
$
(15,176
)
 
$
(68,084
)
 
$
15,962
 
             
Net (loss) earnings allocation - basic and diluted:
            
     Class A net (loss) earnings
 
$
(2,113
)
 
$
(11,408
)
 
$
3,331
 
     Class B net (loss) earnings
  
(9,784
)
  
(53,426
)
  
15,866
 
     Net (loss) earnings
 
$
(11,897
)
 
$
(64,834
)
 
$
19,197
 
             
Denominator:
            
Weighted average shares outstanding:
            
     Class A - basic and diluted
  
2,175
   
2,175
   
2,175
 
     Class B - basic and diluted
  
9,857
   
9,749
   
9,698
 
             
Net (loss) earnings per share:
            
Class A - basic and diluted
 
$
(0.97
)
 
$
(5.25
)
 
$
1.53
 
Class B - basic and diluted
 
$
(0.99
)
 
$
(5.48
)
 
$
1.64