Fair Value - Fair Value Option Maturities, Recurring Basis (Details) - USD ($) $ in Thousands	Dec. 31, 2022	Dec. 31, 2021
Fair value
Total fair value	$ 3,509,300	$ 9,742,483
Recurring basis
Fair value
Total fair value	3,509,300	9,742,483
Mortgage loans held for sale
Fair value
Current through 89 days delinquent	3,450,578	9,577,398
Not in foreclosure	47,252	153,162
In foreclosure	11,470	11,923
Total fair value	3,509,300	9,742,483
Principal amount due upon maturity
Current through 89 days delinquent	3,428,052	9,263,242
Not in foreclosure	53,351	153,875
In foreclosure	16,811	13,649
Total principal amount due upon maturity	3,498,214	9,430,766
Difference
Current through 89 days delinquent	22,526	314,156
Not in foreclosure	(6,099)	(713)
In foreclosure	(5,341)	(1,726)
Total difference	$ 11,086	$ 311,717