Annual report pursuant to Section 13 and 15(d)

LOANS PAYABLE AND OTHER BORROWINGS - Narrative (Details)

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LOANS PAYABLE AND OTHER BORROWINGS - Narrative (Details)
12 Months Ended
Dec. 31, 2020
USD ($)
Dec. 31, 2019
USD ($)
Dec. 31, 2018
USD ($)
Line of Credit Facility [Line Items]      
Repayments $ 500,000,000.0 $ 90,000,000.0  
Proceeds from lines of credit 500,000,000.0 90,000,000.0 $ 285,000,000.0
Total LOCs 97,411,000 60,942,000  
Revolving credit facility [Member] | Line of credit [Member]      
Line of Credit Facility [Line Items]      
Current borrowing capacity 780,000,000.0    
Maximum borrowing capacity 880,000,000.0    
Minimum tangible net worth $ 1,500,000,000    
Leverage ratio 0.60    
Interest coverage ratio 1.50    
Outstanding borrowings under Credit Facility $ 0 $ 0  
Total LOCs 97,400,000    
Line of credit facility, remaining borrowing capacity $ 682,600,000