Derivative Financial Instruments - Offsetting of Derivative Assets - Offsetting of Derivative and Financial Liabilities (Details) - USD ($) $ in Thousands	Jun. 30, 2023	Dec. 31, 2022
Derivatives: Subject to master netting arrangements:
Netting	$ (42,595)	$ (61,534)
Total.
Gross amounts of recognized liabilities	64,634	83,246
Net amounts of liabilities presented in the consolidated balance sheet	22,039	21,712
Mortgage loans sold under agreements to repurchase
Net amounts of liabilities presented in the consolidated balance sheet	3,786,306
Debt Issuance Costs
Net amount of liabilities in the consolidated balance sheet	3,780,524	3,001,283
Total
Net amounts of liabilities presented in the consolidated balance sheet	3,808,345	3,026,402
Net amount of liabilities in the consolidated balance sheet	22,039	21,712
Loan Repo Facility
Mortgage loans sold under agreements to repurchase
Net amounts of liabilities presented in the consolidated balance sheet	3,786,306	3,004,690
Debt Issuance Costs
Debt issuance costs	(5,782)	(3,407)
Net amount of liabilities in the consolidated balance sheet	3,780,524	3,001,283
Forward contracts | Purchases
Total.
Gross amounts of recognized liabilities	45,997	48,670
Forward contracts | Sales
Total.
Gross amounts of recognized liabilities	7,894	20,684
Interest rate lock commitments
Total
Net amounts of liabilities presented in the consolidated balance sheet	10,743	10,884
Net amount of liabilities in the consolidated balance sheet	$ 10,743	10,884
Put options on Eurodollar futures | Sales
Total.
Gross amounts of recognized liabilities		$ 3,008