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NET INCOME PER COMMON SHARE AND EQUITY PER COMMON SHARE (Tables)
12 Months Ended
Dec. 31, 2017
NET INCOME PER COMMON SHARE AND EQUITY PER COMMON SHARE [Abstract]  
Shares Used in Computing Basic and Diluted Net Income per Share
Basic net income per share is based on the weighted average number of common shares outstanding. Diluted net income per share is based on the weighted average number of common shares outstanding, the potentially dilutive effect of employee stock options and restricted stock awards. The following table summarizes the shares used in computing basic and diluted net income per share:

 
For the Year
 
Ended December 31,
 
2017
 
2016
 
2015
 
(in thousands)
 
 
 
 
 
 
Weighted average common shares outstanding during the period for Basic computation
 
9,175
 
 
9,098
 
 
8,960
Dilutive effect of employee stock options
 
67
 
 
63
 
 
45
Weighted average common shares outstanding during the period for Diluted computation
 
9,242
 
 
9,161
 
 
9,005