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EARNINGS PER SHARE DATA - Narrative (Details)
 9 Months Ended
Sep. 30, 2018
$ / shares
shares
Series A Preferred Stock  
Class of Stock [Line Items]  
Preferred stock, liquidation preference per share (in dollars per share) | $ / shares $ 100
Preferred stock, votes per share ratio 0.1
Preferred stock, shares issued (in shares) 1,122
Preferred stock, shares outstanding (in shares) 1,122
Series B Preferred Stock  
Class of Stock [Line Items]  
Preferred stock, liquidation preference per share (in dollars per share) | $ / shares $ 100
Preferred stock, votes per share ratio 0.1
Preferred stock, shares issued (in shares) 15,000
Preferred stock, shares outstanding (in shares) 15,000
Preferred stock, number of shares convertible into common stock (in shares) 56
Preferred stock, monthly dividend per share (in dollars per share) | $ / shares $ 0.50