Mortgage Servicing Rights and Mortgage Servicing Liabilities - Activity in MSRs at Fair Value (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2023	Jun. 30, 2022	Dec. 31, 2022
Change in fair value due to:
Total change in fair value	$ 55,257	$ (112,102)	$ 291,704	$ (325,013)
Mortgage servicing rights
Activity in MSRs carried at fair value
Balance at beginning of period	6,003,390	4,707,039	5,953,621	3,878,078
Additions - Resulting from loan sales	562,523	398,253	849,056	1,014,555
Additions	562,523	398,253	848,824	1,014,555
Sales			(232)
Change in fair value due to:
Changes in valuation inputs used in valuation model	118,898	233,697	28,619	557,625
Other changes in fair value	(174,226)	(121,822)	(320,479)	(233,091)
Total change in fair value	(55,328)	111,875	(291,860)	324,534
Balance at end of period	6,510,585	5,217,167	6,510,585	5,217,167
UPB of underlying loan at end of period	337,695,442	$ 297,269,682	337,695,442	$ 297,269,682
Asset Pledged as Collateral without Right | Mortgage servicing rights
Activity in MSRs carried at fair value
Balance at beginning of period			5,897,613
Change in fair value due to:
Balance at end of period	$ 6,457,553		$ 6,457,553
Assets, Pledging Purpose [Extensible Enumeration]	Notes Payable		Notes Payable		Notes Payable