Annual report pursuant to Section 13 and 15(d)

EARNINGS PER SHARE (Details)

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EARNINGS PER SHARE (Details) - USD ($)
$ / shares in Units, $ in Thousands
 3 Months Ended 12 Months Ended
Dec. 31, 2018
Sep. 30, 2018
Jun. 30, 2018
Mar. 31, 2018
Dec. 31, 2017
Sep. 30, 2017
Jun. 30, 2017
Mar. 31, 2017
Dec. 31, 2018
Dec. 31, 2017
Dec. 31, 2016
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]                      
Net income (loss) attributable to parent                 $ 13,922 $ (28,161) $ (7,978)
Net income attributable to participating securities                 307 0 0
Net income (loss) attributable to common shares                 $ 13,615 $ (28,161) $ (7,978)
Shares:                      
Weighted average number of common shares outstanding—basic (in shares)                 21,167,550 20,760,530 20,350,066
Weighted average number of common shares outstanding—diluted (in shares)                 21,180,490 20,760,530 20,350,066
Earnings per common share:                      
Basic (in usd per share) $ (0.27) $ 1.44 $ (0.49) $ (0.06) $ 2.89 $ (3.91) $ (0.13) $ (0.27) $ 0.64 $ (1.36) $ (0.39)
Diluted (in usd per share) $ (0.27) $ 1.44 $ (0.49) $ (0.06) $ 2.89 $ (3.91) $ (0.13) $ (0.27) $ 0.64 $ (1.36) $ (0.39)
Stock Options and Restricted Stock                      
Shares:                      
Net effect of dilutive stock options and restricted stock awards based on the treasury stock method (in shares)                 12,940 0 0
Earnings per common share:                      
Antidilutive securities excluded from computation of earnings per share (in shares)                 218,844 273,255 294,273