Quarterly report pursuant to Section 13 or 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
3 Months Ended 9 Months Ended
Sep. 30, 2020
Sep. 30, 2019
Sep. 30, 2020
Sep. 30, 2019
Increase Decrease In Mortgage Loans Held For Sale [Abstract]        
Balance at the beginning of period $ 1,982,521 $ 1,333,733 $ 1,504,842 $ 966,171
Disbursements of MLHS 10,041,907 7,129,890 24,657,750 15,696,586
Proceeds from sales of MLHS (10,233,141) (6,959,125) (24,873,813) (15,425,424)
Gain on sale of mortgage loans excluding fair value of other financial instruments, net 438,871 209,630 897,467 467,573
Increase in fair value of mortgage loans held for sale 8,992 (129) 52,904 9,093
Balance at the end of period $ 2,239,150 $ 1,713,999 $ 2,239,150 $ 1,713,999