Annual report pursuant to Section 13 and 15(d)

SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - Schedule of General and Administrative Expenses (Details)

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SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - Schedule of General and Administrative Expenses (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2019
Dec. 31, 2018
Dec. 31, 2017
Schedule Of Other Income [Line Items]      
Legal and professional expense $ 89,489 $ 45,234 $ 40,182
Loan origination expense 59,418 16,050 0
Occupancy expense 19,388    
Occupancy expense   8,868 0
Other 84,251 51,557 26,793
General and Administrative Expense 538,035 231,579 67,159
Servicing      
Schedule Of Other Income [Line Items]      
Compensation and benefits expense, servicing 121,004 47,084 184
Origination      
Schedule Of Other Income [Line Items]      
Compensation and benefits expense, servicing $ 164,485 $ 62,786 $ 0