Fair Value - Level 3 Unobservable Inputs, Mortgage Loans and IRLC (Details) $ in Thousands	Dec. 31, 2022 USD ($) item	Dec. 31, 2021 USD ($) item
Excess servicing spread financing
Loans held for sale | $	$ 3,509,300	$ 9,742,483
Mortgage loans held for sale
Excess servicing spread financing
Loans held for sale | $	3,509,300	9,742,483
Mortgage loans held for sale | Level 3
Excess servicing spread financing
Loans held for sale | $	$ 345,772	$ 1,128,876
Mortgage loans held for sale | Discount rate | Level 3 | Minimum
Excess servicing spread financing
Input	5.5	2.2
Mortgage loans held for sale | Discount rate | Level 3 | Maximum
Excess servicing spread financing
Input	10.2	9.2
Mortgage loans held for sale | Discount rate | Level 3 | Weighted average
Excess servicing spread financing
Input	5.7	2.3
Mortgage loans held for sale | Twelve-month projected housing price index Change | Level 3 | Minimum
Excess servicing spread financing
Input	(1.9)	6.1
Mortgage loans held for sale | Twelve-month projected housing price index Change | Level 3 | Maximum
Excess servicing spread financing
Input	(1.7)	6.5
Mortgage loans held for sale | Twelve-month projected housing price index Change | Level 3 | Weighted average
Excess servicing spread financing
Input	(1.8)	6.2
Mortgage loans held for sale | Prepayment/resale speed | Level 3 | Minimum
Excess servicing spread financing
Input	4.7	0.4
Mortgage loans held for sale | Prepayment/resale speed | Level 3 | Maximum
Excess servicing spread financing
Input	25.6	30.3
Mortgage loans held for sale | Prepayment/resale speed | Level 3 | Weighted average
Excess servicing spread financing
Input	21.6	22.0
Mortgage loans held for sale | Total prepayment speed | Level 3 | Minimum
Excess servicing spread financing
Input	4.8	0.4
Mortgage loans held for sale | Total prepayment speed | Level 3 | Maximum
Excess servicing spread financing
Input	36.1	39.3
Mortgage loans held for sale | Total prepayment speed | Level 3 | Weighted average
Excess servicing spread financing
Input	29.4	28.2
Interest rate lock commitments | Level 3
Excess servicing spread financing
Interest rate lock commitment | $	$ 25,844	$ 322,193
Interest rate lock commitments | Pull-through rate | Level 3 | Minimum
Excess servicing spread financing
Input	10.3	8.0
Interest rate lock commitments | Pull-through rate | Level 3 | Maximum
Excess servicing spread financing
Input	100	100
Interest rate lock commitments | Pull-through rate | Level 3 | Weighted average
Excess servicing spread financing
Input	82.8	78.4
Interest rate lock commitments | Mortgage servicing rights value expressed as servicing fee multiple | Level 3 | Minimum
Excess servicing spread financing
Input	(1.3)	(8.5)
Interest rate lock commitments | Mortgage servicing rights value expressed as servicing fee multiple | Level 3 | Maximum
Excess servicing spread financing
Input	7.7	6.7
Interest rate lock commitments | Mortgage servicing rights value expressed as servicing fee multiple | Level 3 | Weighted average
Excess servicing spread financing
Input	4.3	3.8
Interest rate lock commitments | Percentage of unpaid principal balance | Level 3 | Minimum
Excess servicing spread financing
Input	(0.2)	(1.6)
Interest rate lock commitments | Percentage of unpaid principal balance | Level 3 | Maximum
Excess servicing spread financing
Input	3.8	3.6
Interest rate lock commitments | Percentage of unpaid principal balance | Level 3 | Weighted average
Excess servicing spread financing
Input	2.0	1.5