Quarterly report pursuant to Section 13 or 15(d)

NET INCOME PER COMMON SHARE ATTRIBUTABLE TO TRECORA RESOURCES (Details)

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NET INCOME PER COMMON SHARE ATTRIBUTABLE TO TRECORA RESOURCES (Details) (USD $)
In Thousands, except Share data, unless otherwise specified
3 Months Ended 9 Months Ended
Sep. 30, 2014
Sep. 30, 2013
Sep. 30, 2014
Sep. 30, 2013
Basic Net Income per Share [Abstract]        
Net Income Attributable to Trecora Resources $ 5,774 $ 5,221 $ 13,373 $ 16,315
Weighted average number of shares outstanding, basic (in shares) 24,175,000 24,116,000 24,163,000 24,110,000
Net Income Attributable to Trecora Resources (dollars) $ 0.24 $ 0.22 $ 0.55 $ 0.68
Diluted Net Income per Share [Abstract]        
Net Income Attributable to Trecora Resources $ 5,774 $ 5,221 $ 13,373 $ 16,315
Dilutive stock options outstanding (in shares) 705,000 666,000 707,000 587,000
Weighted average number of shares outstanding, diluted (in shares) 24,880,000 24,782,000 24,870,000 24,697,000
Net Income Attributable to Trecora Resources (dollars) $ 0.23 $ 0.21 $ 0.54 $ 0.66
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]        
Number of shares held in treasury by an outside party (in shares) 300,000 300,000 300,000 300,000
Stock Options [Member]
       
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]        
Antidilutive securities excluded from computation of earnings per share (in shares)     1,560,540 1,233,860
Warrants [Member]
       
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]        
Antidilutive securities excluded from computation of earnings per share (in shares)     100,000