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SHAREHOLDER'S EQUITY (Tables)
 12 Months Ended
Dec. 31, 2015
SHAREHOLDERS' EQUITY [Abstract]  
Schedule of Weighted-Average Assumptions Used To Estimate the Fair Value of Options Granted
The following table presents the weighted-average assumptions used to estimate the fair value of options granted in 2015, 2014 and 2013:

  
2015
  
2014
  
2013
 
          
Expected annual dividend yield
  
0
%
  
0
%
  
0
%
Risk-free interest rate
  
1.73
%
  
2.02
%
  
1.66
%
Expected volatility
  
40.2
%
  
46.9
%
  
41.1
%
Expected life in years
  
6.3
   
6.2
   
7.9
 
Schedule of Outstanding and Exercisable Options
The following table summarizes information concerning outstanding and exercisable options:

  
Weighted Average
 
  
2015
  
2014
  
2013
 
  
Shares
  
Exercise
Price
  
Shares
  
Exercise
Price
  
Shares
  
Exercise
Price
 
Outstanding at beginning of year
  
1,127,250
  
$
16.12
   
1,175,499
  
$
16.11
   
1,353,059
  
$
15.88
 
Granted
  
25,000
  
$
10.62
   
90,000
  
$
13.56
   
60,000
  
$
9.54
 
Exercised
  
(4,000
)
 
$
6.30
   
(33,749
)
 
$
9.78
   
(34,310
)
 
$
3.04
 
Cancelled or expired
  
(193,625
)
 
$
16.29
   
(104,500
)
 
$
15.83
   
(203,250
)
 
$
14.84
 
Outstanding at end of year
  
954,625
  
$
15.98
   
1,127,250
  
$
16.12
   
1,175,499
  
$
16.11
 
                         
Options exercisable at year end
  
832,125
       
839,500
       
772,749
     
Weighted average fair value per option granted during the year
 
$
4.44
      
$
6.46
      
$
4.44
     
Schedule of Options Vested and Exercisable or Nonvested, Expected to Vest (Nonvested Outstanding Less Expected Forfeitures)
The following table summarizes information about options vested and exercisable or nonvested that are expected to vest (nonvested outstanding less expected forfeitures) at December 31, 2015:
 
 
Range of Exercise Prices
  
Number
Exercisable
  
Weighted
Average
Exercise
Price
  
Weighted Average
Remaining
Contractual Life
  
Aggregate
Intrinsic
Value (in
millions)
 
$
5.00
to
 
$
10.00
   
47,202
  
$
9.51
   
7.46
  
$
-
 
$
10.01
to
 
$
15.00
   
390,950
  
$
12.84
   
4.98
   
-
 
$
15.01
to
 
$
20.00
   
431,763
  
$
18.22
   
3.93
   
-
 
$
20.01
to
 
$
20.15
   
100,000
  
$
20.15
   
1.04
   
-
 
$
5.00
to
 
$
20.15
   
969,915
  
$
15.83
   
4.22
  
$
-
 
Schedule of Unvested Stock Options
The following table reflects the activity for all unvested stock options during 2015:

  
Shares
  
Weighted
Average Grant-
Date Fair Value
 
Unvested at January 1, 2015
  
287,750
  
$
8.21
 
Granted
  
25,000
  
$
4.44
 
Vested
  
(132,125
)
 
$
8.67
 
Forfeited
  
(58,125
)
 
$
7.22
 
Unvested at December 31, 2015
  
122,500
  
$
7.40