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Derivative Financial Instruments - Schedule of Fair Value and Notional Amount of Derivatives (Details) - USD ($) $ in Thousands | Sep. 30, 2025 | Dec. 31, 2024
--- | --- | ---
Derivative [Line Items] |  |
Fair Value | $ 40,901 | $ 22,343
Notional Amount | 25,518,093 | 12,215,873
Derivative Liabilities |  |
Derivative [Line Items] |  |
Fair Value | (57,047) | (23,660)
Notional Amount | 11,222,488 | 2,338,485
Derivative Assets |  |
Derivative [Line Items] |  |
Fair Value | 97,948 | 46,003
Notional Amount | 14,295,605 | 9,877,388
TBAs | Derivative Liabilities |  |
Derivative [Line Items] |  |
Fair Value | (27,722) | (16,249)
Notional Amount | 6,365,000 | 1,350,000
TBAs | Derivative Assets |  |
Derivative [Line Items] |  |
Fair Value | 25,583 | 0
Notional Amount | 4,545,000 | 0
Interest rate futures | Derivative Liabilities |  |
Derivative [Line Items] |  |
Fair Value | (21,108) | (6,915)
Notional Amount | 3,585,700 | 830,500
Interest rate futures | Derivative Assets |  |
Derivative [Line Items] |  |
Fair Value | 2,573 | 16,446
Notional Amount | 589,500 | 712,500
Swaptions | Derivative Assets |  |
Derivative [Line Items] |  |
Fair Value | 35,352 | 23,738
Notional Amount | 6,400,000 | 8,245,000
LPCs and IRLCs | Derivative Liabilities |  |
Derivative [Line Items] |  |
Fair Value | (8,217) | (496)
Notional Amount | 1,271,788 | 157,985
LPCs and IRLCs | Derivative Assets |  |
Derivative [Line Items] |  |
Fair Value | 34,440 | 5,819
Notional Amount | $ 2,761,105 | $ 919,888

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