Annual report pursuant to Section 13 and 15(d)

INVESTMENTS IN RESIDENTIAL MORTGAGE LOANS AND REAL ESTATE OWNED - Carrying Value of Mortgage Loans (Details)

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INVESTMENTS IN RESIDENTIAL MORTGAGE LOANS AND REAL ESTATE OWNED - Carrying Value of Mortgage Loans (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2019
Dec. 31, 2018
Dec. 31, 2017
SEC Schedule, 12-29, Real Estate Companies, Investment in Movement in Mortgage Loans on Real Estate [Roll Forward]      
Accretion of loan discount and other amortization $ 379,129 $ 701,967 $ 1,031,384
Transfer of loans to real estate owned (86,167) (107,577)  
Residential Portfolio Segment | Performing Loans      
SEC Schedule, 12-29, Real Estate Companies, Investment in Movement in Mortgage Loans on Real Estate [Roll Forward]      
Balance, beginning 591,253 507,615  
Acquisition 381,039 125,350  
Purchases/additional fundings 0 55,993  
Proceeds from repayments (102,340) (106,236)  
Accretion of loan discount and other amortization 12,661 15,773  
Provision for loan losses (595) (1,028)  
Transfer of loans to other assets 0 0  
Transfer of loans to real estate owned (6,223) (5,131)  
Transfer of loans to held-for-sale (20,505) (1,555)  
Fair value adjustment 4,138 472  
Balance, ending 859,428 591,253 507,615
PCD Loans      
SEC Schedule, 12-29, Real Estate Companies, Investment in Movement in Mortgage Loans on Real Estate [Roll Forward]      
Balance, beginning 144,065 183,540  
Purchases/additional fundings 0 29,785  
Sales 0 0  
Proceeds from repayments (16,855) (38,276)  
Accretion of loan discount and other amortization 16,041 24,124  
(Allowance) reversal for loan losses (2,332) 0  
Transfer of loans to real estate owned (14,487) (28,060)  
Transfer of loans to held-for-sale (60,154) (27,048)  
Balance, ending $ 66,278 $ 144,065 $ 183,540