Loan Sales and Servicing Activities - Geographical Distribution of Loans (Details) - USD ($) $ in Thousands	Sep. 30, 2022	Dec. 31, 2021
Loan Sales and Servicing Activities
Total loans serviced	$ 539,101,773	$ 509,708,281
California
Loan Sales and Servicing Activities
Total loans serviced	67,949,538	67,317,935
Florida
Loan Sales and Servicing Activities
Total loans serviced	49,221,053	45,222,233
Texas
Loan Sales and Servicing Activities
Total loans serviced	45,908,590	42,064,686
Virginia
Loan Sales and Servicing Activities
Total loans serviced	33,026,449	31,442,370
Maryland
Loan Sales and Servicing Activities
Total loans serviced	25,093,210	23,922,075
All other states
Loan Sales and Servicing Activities
Total loans serviced	$ 317,902,933	$ 299,738,982