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Securitizations and Variable Interests Entities - Narrative (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2019
Servicing Assets at Fair Value [Line Items]
Average period to securitization	30 days
Financing Receivable, Threshold Period Past Due	60 days	60 days
Mortgages Held-for-sale, Fair Value Disclosure	$ 1,290.2	$ 674.2
MSR Excess Spread Participation Interest Percentage				100.00%
Variable Interest Entity, Primary Beneficiary | Warehouse Mortgage Loan Financing Facility
Servicing Assets at Fair Value [Line Items]
Deposit Liabilities, Collateral Issued, Financial Instruments	200.0	150.0
Mortgages Held-for-sale, Fair Value Disclosure	375.4	119.5
Variable Interest Entity, Primary Beneficiary | Mortgage Warehouse Agreement [Member]
Servicing Assets at Fair Value [Line Items]
Mortgages Held-for-sale, Fair Value Disclosure	$ 200.0	$ 150.1
Ginnie Mae
Servicing Assets at Fair Value [Line Items]
Percentage of transferred residential loans serviced 60 days or more past due	7.00%	8.00%
Financing Receivable, Threshold Period Past Due	60 days
Forward Loans
Servicing Assets at Fair Value [Line Items]
MSRs retained	$ 247.6	$ 183.0	$ 234.7
Percentage of transferred residential loans serviced 60 days or more past due	2.70%	2.80%

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Time period in which securitization takes place after loan closing or purchase.

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Percentage of loan transferred through securitization 60 days or more past due.

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The amount of mortgage servicing rights (MSRs) retained in connection with transfer of securitized loans accounted for as sales.

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Fair value portion of mortgage loans held-for-sale.

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