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EARNINGS PER SHARE CALCULATIONS - Summary of EPS Calculations, Basic (Details) - $ / shares
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
Earnings Per Share [Abstract]                      
Income from continuing operations attributable to common stockholders (in dollars per share) $ 0.21 $ 0.22 $ 0.76 $ 0.47 $ (0.52) $ 0.33 $ 1.08 $ 0.74 $ 1.66 $ 0.97 $ 3.57
Loss from discontinued operations, net of tax (in dollars per share)                 0.00 (0.05) 0.00
Earnings per common share - basic (in dollars per share)                 $ 1.66 $ 0.92 $ 3.57