Mortgage Servicing Rights - Schedule of Analysis of Change in Fair Value (Details) - MSR - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020
Sensitivity Analysis of Fair Value of Interests Continued to be Held by Transferor, Servicing Assets or Liabilities, Impact of Adverse Change in Assumption [Line Items]
+ 10% adverse change – effect on value, discount rate	$ (107,992)	$ (56,889)
+ 20% adverse change – effect on value, discount rate	(208,567)	(110,040)
+ 10% adverse change – effect on value, prepayment speeds	(138,807)	(87,752)
+ 20% adverse change – effect on value, prepayment speeds	(267,964)	(169,230)
+ 10% adverse change – effect on value, cost of servicing	(37,370)	(21,643)
+ 20% adverse change – effect on value, cost of servicing	$ (74,741)	$ (43,285)