Annual report pursuant to Section 13 and 15(d)

EXCESS MORTGAGE SERVICING RIGHTS - Schedule of Change in Equity Method Investments (Details)

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EXCESS MORTGAGE SERVICING RIGHTS - Schedule of Change in Equity Method Investments (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2020
Dec. 31, 2019
Dec. 31, 2018
Mortgage Servicing Rights [Roll Forward]      
Distributions of capital from equity method investees $ 0 $ (92,748) $ (300,056)
Recurring Basis      
Mortgage Servicing Rights [Roll Forward]      
Balance at beginning of period 125,596 147,964  
Contributions to equity method investees 0 0  
Distributions of earnings from equity method investees (1,170) (8,999)  
Distributions of capital from equity method investees (21,020) (20,169)  
Change in fair value of investments in equity method investees (3,489) 6,800  
Balance at end of period $ 99,917 $ 125,596 $ 147,964