Annual report [Section 13 and 15(d), not S-K Item 405]

Summary of Significant Accounting Policies - Change in Presentation (Details)

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Summary of Significant Accounting Policies - Change in Presentation (Details) - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2024
Dec. 31, 2023
PORTFOLIO INTEREST INCOME    
Interest income $ 1,905,214 $ 1,628,877
Interest expense (1,637,286) (1,360,998)
NET PORTFOLIO INTEREST INCOME 267,928 267,879
OTHER INCOME (EXPENSE)    
Net origination gains 179,837 121,646
Gain on securitization of HECM tails, net 45,535 25,583
Fair value changes from model amortization (201,101) (228,391)
Fair value changes from market inputs or model assumptions 55,924 58,696
Net fair value changes on loans and related obligations 80,195 (22,466)
Fee income 29,244 43,450
Loss on sale and other income from loans held for sale, net 302 (24,994)
Non-funding interest expense, net (39,498) (29,619)
NET OTHER INCOME (EXPENSE) 70,243 (33,629)
TOTAL REVENUES $ 338,171 234,250
Previously Reported    
PORTFOLIO INTEREST INCOME    
Interest income   12,193
Interest expense   (118,728)
OTHER INCOME (EXPENSE)    
Net fair value changes on loans and related obligations   322,329
Fee income   43,450
Loss on sale and other income from loans held for sale, net   (24,994)
TOTAL REVENUES   234,250
Revision of Prior Period, Adjustment    
PORTFOLIO INTEREST INCOME    
Interest income   12,193
Interest expense   (118,728)
OTHER INCOME (EXPENSE)    
Net fair value changes on loans and related obligations   322,329
Fee income   43,450
Loss on sale and other income from loans held for sale, net   (24,994)
Net fair value gains on loans and related obligations    
PORTFOLIO INTEREST INCOME    
Interest income   1,617,954
Interest expense   (1,273,159)
NET PORTFOLIO INTEREST INCOME   344,795
OTHER INCOME (EXPENSE)    
Net origination gains   121,646
Gain on securitization of HECM tails, net   25,583
Fair value changes from model amortization   (228,391)
Fair value changes from market inputs or model assumptions   58,696
Net fair value changes on loans and related obligations   (22,466)
Fee income   0
Loss on sale and other income from loans held for sale, net   0
Non-funding interest expense, net   0
NET OTHER INCOME (EXPENSE)   (22,466)
Fee income    
PORTFOLIO INTEREST INCOME    
Interest income   0
Interest expense   0
NET PORTFOLIO INTEREST INCOME   0
OTHER INCOME (EXPENSE)    
Net origination gains   0
Gain on securitization of HECM tails, net   0
Fair value changes from model amortization   0
Fair value changes from market inputs or model assumptions   0
Net fair value changes on loans and related obligations   0
Fee income   43,450
Loss on sale and other income from loans held for sale, net   0
Non-funding interest expense, net   0
NET OTHER INCOME (EXPENSE)   43,450
Loss on sale and other income from loans held for sale, net    
PORTFOLIO INTEREST INCOME    
Interest income   0
Interest expense   0
NET PORTFOLIO INTEREST INCOME   0
OTHER INCOME (EXPENSE)    
Net origination gains   0
Gain on securitization of HECM tails, net   0
Fair value changes from model amortization   0
Fair value changes from market inputs or model assumptions   0
Net fair value changes on loans and related obligations   0
Fee income   0
Loss on sale and other income from loans held for sale, net   (24,994)
Non-funding interest expense, net   0
NET OTHER INCOME (EXPENSE)   (24,994)
Interest income    
PORTFOLIO INTEREST INCOME    
Interest income   10,923
Interest expense   0
NET PORTFOLIO INTEREST INCOME   10,923
OTHER INCOME (EXPENSE)    
Net origination gains   0
Gain on securitization of HECM tails, net   0
Fair value changes from model amortization   0
Fair value changes from market inputs or model assumptions   0
Net fair value changes on loans and related obligations   0
Fee income   0
Loss on sale and other income from loans held for sale, net   0
Non-funding interest expense, net   1,270
NET OTHER INCOME (EXPENSE)   1,270
Interest expense    
PORTFOLIO INTEREST INCOME    
Interest income   0
Interest expense   (87,839)
NET PORTFOLIO INTEREST INCOME   (87,839)
OTHER INCOME (EXPENSE)    
Net origination gains   0
Gain on securitization of HECM tails, net   0
Fair value changes from model amortization   0
Fair value changes from market inputs or model assumptions   0
Net fair value changes on loans and related obligations   0
Fee income   0
Loss on sale and other income from loans held for sale, net   0
Non-funding interest expense, net   (30,889)
NET OTHER INCOME (EXPENSE)   $ (30,889)