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SUBSEQUENT EVENTS - Narrative (Details) - $ / shares
3 Months Ended
May 09, 2018
Feb. 05, 2018
Mar. 31, 2018
Mar. 31, 2017
Jun. 01, 2018
May 02, 2018
Dec. 31, 2017
Subsequent Event [Line Items]              
Quarterly cash dividend declared on common stock (in dollars per share)   $ 0.45 $ 0.45 $ 0.42      
Shares of preferred stock outstanding (in shares)     5,750,000       5,750,000
Subsequent Event              
Subsequent Event [Line Items]              
Quarterly cash dividend declared on common stock (in dollars per share) $ 0.45            
Series A Preferred Stock | Subsequent Event              
Subsequent Event [Line Items]              
Shares of preferred stock outstanding (in shares)           5,750,000  
Scenario, Forecast              
Subsequent Event [Line Items]              
Redemption price (in dollars per share)         $ 25.00    
Scenario, Forecast | Series A Preferred Stock              
Subsequent Event [Line Items]              
Redemption price (in dollars per share)         25.00    
Accrued and unpaid dividends (in dollars per share)         0.4453125    
Total redemption price (in dollars per share)         $ 25.4453125