Fair Value - Fair Value Option Maturities, Recurring Basis (Details) - USD ($) $ in Thousands	Sep. 30, 2022	Dec. 31, 2021
Fair value
Total fair value	$ 4,149,726	$ 9,742,483
Recurring basis
Fair value
Total fair value	4,149,726	9,742,483
Mortgage loans held for sale | Recurring basis
Fair value
Current through 89 days delinquent	4,087,039	9,577,398
Not in foreclosure	50,232	153,162
In foreclosure	12,455	11,923
Total fair value	4,149,726	9,742,483
Principal amount due upon maturity
Current through 89 days delinquent	4,217,099	9,263,242
Not in foreclosure	54,141	153,875
In foreclosure	16,345	13,649
Total principal amount due upon maturity	4,287,585	9,430,766
Difference
Current through 89 days delinquent	(130,060)	314,156
Not in foreclosure	(3,909)	(713)
In foreclosure	(3,890)	(1,726)
Total difference	$ (137,859)	$ 311,717