Quarterly report [Sections 13 or 15(d)]

Derivative Instruments and Hedging Activities - Derivative Instruments, Gain (Loss) in Statement of Financial Performance (Details)

v3.25.3
Derivative Instruments and Hedging Activities - Derivative Instruments, Gain (Loss) in Statement of Financial Performance (Details) - USD ($)
$ in Thousands
 3 Months Ended 9 Months Ended
Sep. 30, 2025
Sep. 30, 2024
Sep. 30, 2025
Sep. 30, 2024
Derivative Instruments, Gain (Loss) [Line Items]        
Amount of Gain (Loss) Recognized in Income $ 69,182 $ (204,477) $ (112,107) $ (37,106)
TBAs | Gain (loss) on other derivative instruments        
Derivative Instruments, Gain (Loss) [Line Items]        
Amount of Gain (Loss) Recognized in Income 69,324 84,073 88,045 (2,438)
Futures, net | Gain (loss) on other derivative instruments        
Derivative Instruments, Gain (Loss) [Line Items]        
Amount of Gain (Loss) Recognized in Income (9,697) (119,553) (64,612) 16,061
Options on futures | Gain (loss) on other derivative instruments        
Derivative Instruments, Gain (Loss) [Line Items]        
Amount of Gain (Loss) Recognized in Income (161) 0 (285) (127)
Interest rate swap agreements | Payers | Gain (loss) on interest rate swap and swaption agreements        
Derivative Instruments, Gain (Loss) [Line Items]        
Amount of Gain (Loss) Recognized in Income (12,175) (201,417) (309,164) 17,521
Interest rate swap agreements | Receivers | Gain (loss) on interest rate swap and swaption agreements        
Derivative Instruments, Gain (Loss) [Line Items]        
Amount of Gain (Loss) Recognized in Income 16,477 29,155 161,728 (69,292)
Swaptions, net | Gain (loss) on interest rate swap and swaption agreements        
Derivative Instruments, Gain (Loss) [Line Items]        
Amount of Gain (Loss) Recognized in Income 0 0 0 31
TBAs (pipeline) | Gain on mortgage loans held-for-sale        
Derivative Instruments, Gain (Loss) [Line Items]        
Amount of Gain (Loss) Recognized in Income (163) 0 (245) 0
Interest rate lock commitments | Gain on mortgage loans held-for-sale        
Derivative Instruments, Gain (Loss) [Line Items]        
Amount of Gain (Loss) Recognized in Income 447 478 930 478
Forward mortgage loan sale commitments | Gain on mortgage loans held-for-sale        
Derivative Instruments, Gain (Loss) [Line Items]        
Amount of Gain (Loss) Recognized in Income 0 29 (143) 29
Inverse interest-only securities | Gain (loss) on other derivative instruments        
Derivative Instruments, Gain (Loss) [Line Items]        
Amount of Gain (Loss) Recognized in Income $ 5,130 $ 2,758 $ 11,639 $ 631