Quarterly report pursuant to Section 13 or 15(d)

Fair Value - Fair Value, Assets Measured On Recurring Basis, Unobservable Input Reconciliation (Details)

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Fair Value - Fair Value, Assets Measured On Recurring Basis, Unobservable Input Reconciliation (Details) - USD ($)
$ in Thousands
 3 Months Ended 12 Months Ended
Jun. 30, 2021
Mar. 31, 2021
Dec. 31, 2020
Mortgage loans held for investment      
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]      
Beginning balance $ 11,171,736 $ 10,659,984 $ 10,894,577
Total gain or losses included in earnings 153,690 132,499 627,251
Purchases, settlements and transfers:      
Purchases and additions, net 1,428,976 1,143,109 3,616,667
Sales and settlements (615,958) (534,738) (1,536,977)
Transfers in/(out) between categories (597,327) (229,118) (2,941,534)
Ending balance 11,541,117 11,171,736 10,659,984
Mortgage loans held for investment, subject to nonrecourse debt      
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]      
Beginning balance 5,291,444 5,396,167 3,511,212
Total gain or losses included in earnings 80,408 (37,757) 304,663
Purchases, settlements and transfers:      
Purchases and additions, net 22,041 21,064 136,838
Sales and settlements (522,141) (360,128) (1,285,902)
Transfers in/(out) between categories 552,869 272,098 2,729,356
Ending balance 5,424,621 5,291,444 5,396,167
Mortgage loans held for sale      
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]      
Beginning balance 135,681 152,854 182,973
Total gain or losses included in earnings 1,816 2,764 (2,158)
Purchases, settlements and transfers:      
Purchases and additions, net 256,438 175,551 409,467
Sales and settlements (275,956) (152,579) (605,018)
Transfers in/(out) between categories 42,909 (42,909) 167,590
Ending balance 160,888 135,681 152,854
Derivative assets      
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]      
Beginning balance 38,574 88,660 14,008
Total gain or losses included in earnings (3,066) (50,040) 74,470
Purchases, settlements and transfers:      
Purchases and additions, net     182
Sales and settlements (25) (46)  
Ending balance 35,483 38,574 88,660
Mortgage servicing rights      
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]      
Beginning balance 267,364 180,684 2,600
Total gain or losses included in earnings (26,536) 20,349 4,562
Purchases, settlements and transfers:      
Purchases and additions, net 50,110 74,978 173,522
Sales and settlements   (8,647)  
Ending balance 290,938 267,364 180,684
Debt securities      
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]      
Beginning balance     102,260
Total gain or losses included in earnings     2,288
Purchases, settlements and transfers:      
Purchases and additions, net     24,489
Sales and settlements     (129,037)
Retained Bonds      
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]      
Total gain or losses included in earnings 666    
Purchases, settlements and transfers:      
Purchases and additions, net 15,078    
Sales and settlements (73)    
Ending balance 15,671    
Investments      
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]      
Beginning balance 9,470 18,934 20,508
Total gain or losses included in earnings (3,470) (9,464) (5,512)
Purchases, settlements and transfers:      
Purchases and additions, net     3,938
Ending balance $ 6,000 $ 9,470 $ 18,934