Derivative Financial Instruments - Offsetting of Derivative Assets - Offsetting of Derivative and Financial Liabilities (Details) - USD ($) $ in Thousands	Jun. 30, 2022	Dec. 31, 2021
Derivatives: Subject to master netting arrangements:
Netting	$ (65,325)	$ (32,096)
Total.
Gross amounts of recognized liabilities	108,027	54,702
Net amounts of liabilities presented in the consolidated balance sheet	42,702	22,606
Mortgage loans sold under agreements to repurchase
Net amounts of liabilities presented in the consolidated balance sheet	2,446,014
Debt Issuance Costs
Net amount of liabilities in the consolidated balance sheet	2,441,816	7,292,735
Total
Net amounts of liabilities presented in the consolidated balance sheet	2,488,716	7,319,966
Net amount of liabilities in the consolidated balance sheet	42,702	22,606
Loan Repo Facility
Mortgage loans sold under agreements to repurchase
Net amounts of liabilities presented in the consolidated balance sheet	2,446,014	7,297,360
Debt Issuance Costs
Debt issuance costs	(4,198)	(4,625)
Net amount of liabilities in the consolidated balance sheet	2,441,816	7,292,735
Forward contracts | Purchases
Total.
Gross amounts of recognized liabilities	13,005	18,007
Forward contracts | Sales
Total.
Gross amounts of recognized liabilities	89,488	35,415
Interest rate lock commitments
Total
Net amounts of liabilities presented in the consolidated balance sheet	5,534	1,280
Net amount of liabilities in the consolidated balance sheet	$ 5,534	$ 1,280