Fair Value - Level 3 Unobservable Inputs, Mortgage Loans and IRLC (Details) $ in Thousands	Mar. 31, 2026 USD ($) item	Dec. 31, 2025 USD ($) item
Excess servicing spread financing
Loans held for sale	$ 9,954,495	$ 9,123,410
Mortgage loans held for sale \| Level 3
Excess servicing spread financing
Loans held for sale	$ 428,957	$ 307,711
Mortgage loans held for sale \| Discount rate \| Level 3 \| Minimum
Excess servicing spread financing
Input	0.057	0.056
Mortgage loans held for sale \| Discount rate \| Level 3 \| Maximum
Excess servicing spread financing
Input	0.093	0.093
Mortgage loans held for sale \| Discount rate \| Level 3 \| Weighted average
Excess servicing spread financing
Input	0.065	0.063
Mortgage loans held for sale \| Twelve-month projected housing price index Change \| Level 3 \| Minimum
Excess servicing spread financing
Input	0.011	0.008
Mortgage loans held for sale \| Twelve-month projected housing price index Change \| Level 3 \| Maximum
Excess servicing spread financing
Input	0.016	0.013
Mortgage loans held for sale \| Twelve-month projected housing price index Change \| Level 3 \| Weighted average
Excess servicing spread financing
Input	0.013	0.01
Mortgage loans held for sale \| Prepayment/resale speed \| Level 3 \| Minimum
Excess servicing spread financing
Input	0.068	0.069
Mortgage loans held for sale \| Prepayment/resale speed \| Level 3 \| Maximum
Excess servicing spread financing
Input	0.222	0.227
Mortgage loans held for sale \| Prepayment/resale speed \| Level 3 \| Weighted average
Excess servicing spread financing
Input	0.168	0.189
Mortgage loans held for sale \| Total prepayment speed \| Level 3 \| Minimum
Excess servicing spread financing
Input	0.069	0.07
Mortgage loans held for sale \| Total prepayment speed \| Level 3 \| Maximum
Excess servicing spread financing
Input	0.405	0.375
Mortgage loans held for sale \| Total prepayment speed \| Level 3 \| Weighted average
Excess servicing spread financing
Input	0.222	0.241
Interest rate lock commitments \| Level 3
Excess servicing spread financing
Fair Value	$ 105,936	$ 127,276
Committed amount	$ 16,241,426	$ 13,474,638
Interest rate lock commitments \| Pull-through rate \| Level 3 \| Minimum
Excess servicing spread financing
Input	0.16	0.141
Interest rate lock commitments \| Pull-through rate \| Level 3 \| Maximum
Excess servicing spread financing
Input	1	1
Interest rate lock commitments \| Pull-through rate \| Level 3 \| Weighted average
Excess servicing spread financing
Input	0.816	0.81
Interest rate lock commitments \| Mortgage servicing rights value expressed as servicing fee multiple \| Level 3 \| Minimum
Excess servicing spread financing
Input \| item	1	1
Interest rate lock commitments \| Mortgage servicing rights value expressed as servicing fee multiple \| Level 3 \| Maximum
Excess servicing spread financing
Input \| item	8.7	8.7
Interest rate lock commitments \| Mortgage servicing rights value expressed as servicing fee multiple \| Level 3 \| Weighted average
Excess servicing spread financing
Input \| item	5.5	5.4
Interest rate lock commitments \| Percentage of unpaid principal balance \| Level 3 \| Minimum
Excess servicing spread financing
Input	0.003	0.003
Interest rate lock commitments \| Percentage of unpaid principal balance \| Level 3 \| Maximum
Excess servicing spread financing
Input	0.044	0.046
Interest rate lock commitments \| Percentage of unpaid principal balance \| Level 3 \| Weighted average
Excess servicing spread financing
Input	0.019	0.022