Derivative Financial Instruments - Offsetting of Derivative Assets - Offsetting of Derivative and Financial Liabilities (Details) - USD ($) $ in Thousands	Sep. 30, 2024	Dec. 31, 2023
Derivatives: Subject to master netting arrangements:
Netting	$ (61,765)	$ (48,591)
Derivative Liability [Abstract]
Gross amounts of recognized liabilities	103,236	101,866
Net amounts of liabilities presented in the consolidated balance sheet	41,471	53,275
Mortgage loans sold under agreements to repurchase
Net amounts of liabilities presented in the consolidated balance sheet	6,609,703
Debt Issuance Costs
Net amount of liabilities in the consolidated balance sheet	6,600,997	3,763,956
Total
Net amounts of liabilities presented in the consolidated balance sheet	6,651,174	3,822,724
Net amount of liabilities in the consolidated balance sheet	41,471	53,275
Loan Repo Facility
Mortgage loans sold under agreements to repurchase
Net amounts of liabilities presented in the consolidated balance sheet	6,609,703	3,769,449
Debt Issuance Costs
Debt issuance costs	(8,706)	(5,493)
Net amount of liabilities in the consolidated balance sheet	6,600,997	3,763,956
Forward contracts | Purchases
Derivative Liability [Abstract]
Gross amounts of recognized liabilities	50,487	5,141
Forward contracts | Sales
Derivative Liability [Abstract]
Gross amounts of recognized liabilities	36,855	92,796
Interest rate lock commitments
Total
Net amounts of liabilities presented in the consolidated balance sheet	2,222	720
Net amount of liabilities in the consolidated balance sheet	$ 2,222	720
Call options on Eurodollar futures | Purchases
Derivative Liability [Abstract]
Gross amounts of recognized liabilities		$ 3,209