Quarterly report pursuant to Section 13 or 15(d)

LOANS PAYABLE AND OTHER BORROWINGS - Narrative (Details)

v3.8.0.1
LOANS PAYABLE AND OTHER BORROWINGS - Narrative (Details)
3 Months Ended
Mar. 31, 2018
USD ($)
Mar. 31, 2017
USD ($)
Dec. 31, 2017
USD ($)
Line of Credit Facility [Line Items]      
Proceeds from Lines of Credit $ 285,000,000 $ 160,000,000  
Repayments of Lines of Credit 285,000,000 $ 115,000,000  
Revolving credit facility [Member] | Line of Credit [Member]      
Line of Credit Facility [Line Items]      
Current borrowing capacity 625,000,000    
Maximum borrowing capacity 725,000,000    
Minimum tangible net worth $ 987,400,000    
Leverage ratio 0.6    
Interest coverage ratio 1.5    
Outstanding borrowings under Credit Facility $ 0   $ 0
Total LOCs 95,357,000   74,672,000
Remaining borrowing capacity 529,600,000    
Revolving credit facility [Member] | Line of Credit [Member] | Revolving Credit Facility Maturing July 2021 [Member]      
Line of Credit Facility [Line Items]      
Current borrowing capacity $ 625,000,000.0   565,000,000
Revolving credit facility [Member] | Line of Credit [Member] | Revolving Credit Facility Maturing July 2019 [Member]      
Line of Credit Facility [Line Items]      
Current borrowing capacity     $ 60,000,000.0