Loans Held for Sale at Fair Value (Details) - USD ($) $ in Thousands	Mar. 31, 2023	Dec. 31, 2022
Mortgage Loans Held for Sale at Fair Value
Loans held for sale	$ 6,772,423	$ 3,509,300
Government-insured or guaranteed
Mortgage Loans Held for Sale at Fair Value
Loans held for sale	3,683,535	2,006,157
Conventional mortgage loans
Mortgage Loans Held for Sale at Fair Value
Loans held for sale	2,747,886	1,145,053
Jumbo Loan
Mortgage Loans Held for Sale at Fair Value
Loans held for sale	28,213	12,318
Closed-end second
Mortgage Loans Held for Sale at Fair Value
Loans held for sale	74,393	46,589
Mortgage loans purchased from Ginnie Mae pools serviced by the entity
Mortgage Loans Held for Sale at Fair Value
Loans held for sale	211,079	257,175
Mortgage loans repurchased pursuant to representations and warranties
Mortgage Loans Held for Sale at Fair Value
Loans held for sale	27,317	42,008
Asset Pledged as Collateral without Right
Mortgage Loans Held for Sale at Fair Value
Loans held for sale	6,668,418	3,442,847
Asset Pledged as Collateral without Right | Loan Repo Facility
Mortgage Loans Held for Sale at Fair Value
Loans held for sale	6,124,986	3,139,870
Asset Pledged as Collateral without Right | Mortgage Loan Participation and Sale Agreement member
Mortgage Loans Held for Sale at Fair Value
Loans held for sale	$ 543,432	$ 302,977