Quarterly report pursuant to Section 13 or 15(d)

LOANS PAYABLE AND OTHER BORROWINGS - Narrative (Details)

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LOANS PAYABLE AND OTHER BORROWINGS - Narrative (Details)
9 Months Ended
Sep. 30, 2018
USD ($)
Sep. 30, 2017
USD ($)
Dec. 31, 2017
USD ($)
Line of Credit Facility [Line Items]      
Proceeds from Lines of Credit $ 285,000,000 $ 320,000,000  
Repayments of Lines of Credit 285,000,000 $ 310,000,000  
Revolving credit facility [Member] | Line of Credit [Member]      
Line of Credit Facility [Line Items]      
Current borrowing capacity 780,000,000    
Maximum borrowing capacity 880,000,000    
Minimum tangible net worth $ 1,100,000,000    
Leverage ratio 0.6    
Interest coverage ratio 1.5    
Outstanding borrowings under Credit Facility $ 0   $ 0
Total LOCs 76,169,000   $ 74,672,000
Remaining borrowing capacity $ 703,800,000