Fair Value Accounting - Unobservable Inputs (Details)	Dec. 31, 2025 USD ($)	Dec. 31, 2024 USD ($)
Minimum | Option adjusted spread (in basis points)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
MSRs, measurement input	0.0283	0.0021
Minimum | Conditional Prepayment Rate
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
MSRs, measurement input	0.061	0.084
Minimum | Recapture rate
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
MSRs, measurement input	0.000	0.200
Minimum | Servicing fee rate (in basis points)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
MSRs, measurement input	0.00250	0.00250
Minimum | Cost to service
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
MSRs, measurement input	77	75
Minimum | Lifetime Liquidation Probability
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Loans HFS, measurement input	0.016
Minimum | Whole loan spread to TBA price in basis points
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Loans HFS, measurement input		(9.0)
Minimum | Servicing fee multiple
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
IRLCs, measurement input	4.7	4.3
Minimum | Pull-through rate
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
IRLCs, measurement input	0.74	0.76
Minimum | Third party appraisal | Loans HFI | Significant Unobservable Inputs (Level 3) | Fair Value, Nonrecurring | Valuation Technique, Collateral Method
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Loans HFI, measurement input	6.00%	6.00%
Minimum | Third party appraisal | Other assets acquired through foreclosure | Significant Unobservable Inputs (Level 3) | Fair Value, Nonrecurring | Valuation Technique, Collateral Method
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Other assets acquired through foreclosure, measurement input	1.00%	1.00%
Minimum | Discount rate | Loans HFI | Significant Unobservable Inputs (Level 3) | Fair Value, Nonrecurring | Valuation Technique, Discounted Cash Flow
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Loans HFI, measurement input	3.00%	3.00%
Minimum | Scheduled cash collections | Loans HFI | Significant Unobservable Inputs (Level 3) | Fair Value, Nonrecurring | Valuation Technique, Discounted Cash Flow
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Loans HFI, measurement input	0.00%	0.00%
Minimum | Proceeds from non-real estate collateral | Loans HFI | Significant Unobservable Inputs (Level 3) | Fair Value, Nonrecurring | Valuation Technique, Discounted Cash Flow
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Loans HFI, measurement input	0.00%	0.00%
Maximum | Option adjusted spread (in basis points)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
MSRs, measurement input	0.0317	0.0315
Maximum | Conditional Prepayment Rate
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
MSRs, measurement input	0.141	0.190
Maximum | Recapture rate
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
MSRs, measurement input	0.550	0.200
Maximum | Servicing fee rate (in basis points)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
MSRs, measurement input	0.00565	0.00565
Maximum | Cost to service
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
MSRs, measurement input	83	95
Maximum | Lifetime Liquidation Probability
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Loans HFS, measurement input	0.107
Maximum | Whole loan spread to TBA price in basis points
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Loans HFS, measurement input		0.0
Maximum | Servicing fee multiple
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
IRLCs, measurement input	6.5	6.4
Maximum | Pull-through rate
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
IRLCs, measurement input	1	1
Maximum | Third party appraisal | Loans HFI | Significant Unobservable Inputs (Level 3) | Fair Value, Nonrecurring | Valuation Technique, Collateral Method
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Loans HFI, measurement input	10.00%	10.00%
Maximum | Third party appraisal | Other assets acquired through foreclosure | Significant Unobservable Inputs (Level 3) | Fair Value, Nonrecurring | Valuation Technique, Collateral Method
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Other assets acquired through foreclosure, measurement input	6.00%	6.00%
Maximum | Discount rate | Loans HFI | Significant Unobservable Inputs (Level 3) | Fair Value, Nonrecurring | Valuation Technique, Discounted Cash Flow
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Loans HFI, measurement input	8.00%	8.00%
Maximum | Scheduled cash collections | Loans HFI | Significant Unobservable Inputs (Level 3) | Fair Value, Nonrecurring | Valuation Technique, Discounted Cash Flow
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Loans HFI, measurement input	20.00%	20.00%
Maximum | Proceeds from non-real estate collateral | Loans HFI | Significant Unobservable Inputs (Level 3) | Fair Value, Nonrecurring | Valuation Technique, Discounted Cash Flow
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Loans HFI, measurement input	70.00%	70.00%
Weighted Average | Option adjusted spread (in basis points)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
MSRs, measurement input	0.0316	0.0237
Weighted Average | Conditional Prepayment Rate
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
MSRs, measurement input	0.110	0.140
Weighted Average | Recapture rate
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
MSRs, measurement input	0.255	0.200
Weighted Average | Servicing fee rate (in basis points)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
MSRs, measurement input	0.00381	0.00364
Weighted Average | Cost to service
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
MSRs, measurement input	79	82
Weighted Average | Lifetime Liquidation Probability
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Loans HFS, measurement input	0.046
Weighted Average | Whole loan spread to TBA price in basis points
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Loans HFS, measurement input		(7.0)
Weighted Average | Servicing fee multiple
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
IRLCs, measurement input	5.5	5.3
Weighted Average | Pull-through rate
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
IRLCs, measurement input	0.92	0.92