Annual report pursuant to Section 13 and 15(d)

Mortgage Loans Held for Sale - Summary of Reconciliation of Changes in Mortgage Loans Held for Sale to Amounts Presented in Condensed Consolidated Statements of Cash Flows (Details)

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Mortgage Loans Held for Sale - Summary of Reconciliation of Changes in Mortgage Loans Held for Sale to Amounts Presented in Condensed Consolidated Statements of Cash Flows (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2020
Dec. 31, 2019
Increase Decrease In Mortgage Loans Held For Sale [Abstract]    
Balance at the beginning of period $ 1,504,842 $ 966,171
Origination of mortgage loans held for sale 35,238,696 21,749,675
Proceeds on sale of payments from mortgage loans held for sale (35,754,326) (21,854,967)
Gain on sale of mortgage loans excluding fair value of other financial instruments, net 1,323,482 638,902
Valuation adjustment of mortgage loans held for sale 56,083 5,061
Balance at the end of period $ 2,368,777 $ 1,504,842