XML 96 R62.htm IDEA: XBRL DOCUMENT v3.19.3
LOANS - Summary of Commercial Real Estate Investments Held for Investment (Details) - USD ($)
$ in Thousands
Sep. 30, 2019
Dec. 31, 2018
Dec. 31, 2017
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]      
Outstanding Principal $ 114,328,368 $ 96,602,237  
Loans [1] 3,946,614 4,585,975 [2]  
Carrying value, unamortized origination fees 7,300 7,600  
Commercial Mortgage      
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]      
Outstanding Principal 1,441,437 1,307,911  
Loans $ 1,421,434 $ 1,296,803 $ 1,029,327
Percentage of Loan Portfolio 100.00% 100.00%  
Commercial Mortgage | Senior mortgages      
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]      
Outstanding Principal $ 434,949 $ 988,248  
Loans $ 432,460 $ 981,202 625,900
Percentage of Loan Portfolio 30.20% 75.60%  
Commercial Mortgage | Senior Securitized Mortgages      
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]      
Outstanding Principal $ 814,423 $ 0  
Loans $ 810,005 $ 0  
Percentage of Loan Portfolio 56.50% 0.00%  
Commercial Mortgage | Mezzanine loans      
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]      
Outstanding Principal $ 192,065 $ 319,663  
Loans $ 178,969 $ 315,601 $ 394,442
Percentage of Loan Portfolio 13.30% 24.40%  
[1]
(4) 
Includes $76.3 million and $97.5 million of residential mortgage loans held for sale and $0 and $42.2 million of commercial mortgage loans held for sale at September 30, 2019 and December 31, 2018, respectively.

[2]
(1) 
Derived from the audited consolidated financial statements at December 31, 2018.