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RELATED PARTY TRANSACTIONS (Details) - USD ($)
6 Months Ended
Mar. 01, 2016
Jun. 30, 2018
Jun. 30, 2017
Related Party Transaction [Line Items]      
Dividend rate 1.25%    
Dividends   $ 0 $ 0
Equity Method Investee      
Related Party Transaction [Line Items]      
Standby letters of credit, recorded liability   1,400,000  
Series C Preferred Stock      
Related Party Transaction [Line Items]      
Shares issued (in shares) 435,000    
Shares issued $ 435,000,000    
Dividends payable   $ 53,500,000