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, 2024	Jun. 30, 2023	Jun. 30, 2024	Jun. 30, 2023	Dec. 31, 2023
Change in fair value due to:
Total change in fair value	$ 101,315	$ 55,257	$ 129,900	$ 291,704
Mortgage servicing rights
Activity in MSRs carried at fair value
Balance at beginning of period	7,483,210	6,003,390	7,099,348	5,953,621
Additions - Resulting from loan sales	541,207	562,523	953,727	849,056
Additions	541,207	562,523	953,727	848,824
Sales				(232)
Change in fair value due to:
Changes in valuation inputs used in valuation model	99,440	118,898	269,392	28,619
Other changes in fair value	(200,779)	(174,226)	(399,389)	(320,479)
Total change in fair value	(101,339)	(55,328)	(129,997)	(291,860)
Balance at end of period	7,923,078	6,510,585	7,923,078	6,510,585
UPB of underlying loan at end of period	$ 396,429,820	$ 337,695,442	$ 396,429,820	$ 337,695,442
Asset Pledged as Collateral without Right
Change in fair value due to:
Assets, Pledging Purpose [Extensible Enumeration]	Notes Payable		Notes Payable		Notes Payable
Asset Pledged as Collateral without Right | Mortgage servicing rights
Activity in MSRs carried at fair value
Balance at beginning of period			$ 7,033,892
Change in fair value due to:
Balance at end of period	$ 7,831,978		$ 7,831,978
Assets, Pledging Purpose [Extensible Enumeration]	Notes Payable		Notes Payable		Notes Payable