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, 2025	Jun. 30, 2024	Jun. 30, 2025	Jun. 30, 2024	Dec. 31, 2024
Change in fair value due to:
Total change in fair value	$ 247,170	$ 101,315	$ 678,126	$ 129,900
Mortgage servicing rights
Activity in MSRs carried at fair value
Balance at beginning of quarter	8,963,889	7,483,210	8,744,528	7,099,348
MSRs resulting from loan sales	814,538	541,207	1,464,887	953,727
Change in fair value due to:
Changes in inputs used in valuation model	15,950	99,440	(189,539)	269,392
Other changes in fair value	(263,128)	(200,779)	(488,627)	(399,389)
Total change in fair value	(247,178)	(101,339)	(678,166)	(129,997)
Balance at end of quarter	9,531,249	7,923,078	9,531,249	7,923,078
Unpaid principal balance of underlying loans at end of quarter	$ 463,132,127	$ 396,429,820	$ 463,132,127	$ 396,429,820
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 quarter			$ 8,609,388
Change in fair value due to:
Balance at end of quarter	$ 9,350,647		$ 9,350,647
Assets, Pledging Purpose [Extensible Enumeration]	Notes Payable		Notes Payable		Notes Payable