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Derivative Financial Instruments - Schedule of Notional Amounts of Derivative Contracts Outstanding (Details) - USD ($) $ in Thousands | Sep. 30, 2023 | Dec. 31, 2022
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Derivative [Line Items] |  |
Notional amount | $ 9,756,800 | $ 6,828,335
IRLCs |  |
Derivative [Line Items] |  |
Notional amount | 152,800 | 82,335
Derivative contracts to manage future loan sale execution risk | Interest rate swaps |  |
Derivative [Line Items] |  |
Notional amount | 8,322,000 | 5,638,177
Derivative contracts to manage future loan sale execution risk | Interest rate caps |  |
Derivative [Line Items] |  |
Notional amount | 405,000 | 405,000
Derivative contracts to manage future loan sale execution risk | Home loan pipeline hedges |  |
Derivative [Line Items] |  |
Notional amount | 349,000 | 126,000
Derivative contracts not designed to manage future loan sale execution risk | Interest rate swaps |  |
Derivative [Line Items] |  |
Notional amount | 123,000 | 171,823
Derivative contracts not designed to manage future loan sale execution risk | Interest rate caps |  |
Derivative [Line Items] |  |
Notional amount | $ 405,000 | $ 405,000

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