Mortgage Servicing Rights and Mortgage Servicing Liabilities - Activity in MSRs at Fair Value (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2025	Mar. 31, 2024	Dec. 31, 2024
Change in fair value due to:
Total change in fair value	$ 430,956	$ 28,585
Mortgage servicing rights
Activity in MSRs carried at fair value
Balance at beginning of quarter	8,744,528	7,099,348
MSRs resulting from loan sales	650,349	412,520
Change in fair value due to:
Changes in inputs used in valuation model	(205,489)	169,952
Other changes in fair value	(225,499)	(198,610)
Total change in fair value	(430,988)	(28,658)
Balance at end of quarter	8,963,889	7,483,210
Unpaid principal balance of underlying loans at end of quarter	$ 442,208,097	$ 381,470,663
Asset Pledged as Collateral without Right
Change in fair value due to:
Assets, Pledging Purpose [Extensible Enumeration]	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	$ 8,802,948
Assets, Pledging Purpose [Extensible Enumeration]	Notes Payable		Notes Payable