Fair Value - Fair Value Option Maturities, Recurring Basis (Details) - USD ($) $ in Thousands	Sep. 30, 2024	Dec. 31, 2023
Fair value
Total fair value	$ 6,565,704	$ 4,420,691
Recurring basis
Fair value
Total fair value	6,565,704	4,420,691
Mortgage loans held for sale | Recurring basis
Fair value
Current through 89 days delinquent	6,531,836	4,378,042
Not in foreclosure	29,485	35,253
In foreclosure	4,383	7,396
Total fair value	6,565,704	4,420,691
Principal amount due upon maturity
Current through 89 days delinquent	6,325,838	4,233,764
Not in foreclosure	31,884	38,922
In foreclosure	9,065	22,003
Total principal amount due upon maturity	6,366,787	4,294,689
Difference
Current through 89 days delinquent	205,998	144,278
Not in foreclosure	(2,399)	(3,669)
In foreclosure	(4,682)	(14,607)
Total difference	$ 198,917	$ 126,002