Long-Term Debt - Note Payable (Details) $ in Thousands	3 Months Ended	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2024 USD ($) item	Dec. 31, 2023 USD ($)	Dec. 31, 2022 USD ($)
During the year:
Unpaid principal balance		$ 8,692,756
Carrying value:
Notes payable		2,048,972	$ 1,873,415
Servicing advances, net		568,512	694,038
Mortgage servicing rights, at fair value		8,744,528	7,099,348
Other assets		$ 770,081	582,460
Notes payable
Number Of Lenders | item		2
Debt Instrument, Variable Interest Rate, Type [Extensible Enumeration]		us-gaap:SecuredOvernightFinancingRateSofrMember
Debt Instrument Option To Extend Period	2 years
Asset Pledged as Collateral without Right
Carrying value:
Servicing advances, net		$ 357,939	354,831
Mortgage servicing rights, at fair value		$ 8,609,388	$ 7,033,892
Assets, Pledging Purpose [Extensible Enumeration]		Notes payable	Notes payable
Other assets		$ 16,697	$ 15,653
Asset Pledged as Collateral without Right | Mortgage servicing rights
Carrying value:
Assets, Pledging Purpose [Extensible Enumeration]		Notes payable	Notes payable
Asset Pledged as Collateral without Right | Deposits.
Carrying value:
Other assets		$ 16,697	$ 15,653
Note Payable
During the year:
Average balance		$ 1,848,374	$ 2,421,124	$ 1,584,383
Weighted-average interest rate (as a percent)		8.73%	8.59%	4.88%
Total interest expense		$ 164,161	$ 211,085	$ 79,813
Carrying value:
Unpaid principal balance		2,055,000	1,880,000
Unamortized debt issuance costs		(6,028)	(6,585)
Notes payable		$ 2,048,972	$ 1,873,415
Weighted-average interest rate (as a percent)		7.81%	8.82%
Amortization of Debt Issuance Costs		$ 2,900	$ 3,200	2,500
Notes payable
Maximum loan amount		1,730,000
Note Payable | Asset Pledged as Collateral without Right | Servicing advances
Carrying value:
Servicing advances, net		357,939	354,831
Note Payable | Asset Pledged as Collateral without Right | Mortgage servicing rights
Carrying value:
Mortgage servicing rights, at fair value		8,609,388	7,033,892
Note Payable | Asset Pledged as Collateral without Right | Deposits. | Deposit
Carrying value:
Other assets		16,697	15,653
Note Payable expiring 2024
Notes payable
Maximum loan amount		900,000
Committed amount of debt instrument		850,000
Notes Payable Term Loan 2022-GT1
Notes payable
Maximum loan amount		$ 500,000
Interest rate spread		4.25%
Notes Payable Term Loan 2024-GT1
Notes payable
Maximum loan amount		$ 425,000
Interest rate spread		3.20%
Notes Payable Term Loan 2023-GT1
Notes payable
Maximum loan amount		$ 680,000
Interest rate spread		3.00%
Notes Payable Term Loan 2023-GT2
Notes payable
Maximum loan amount		$ 125,000
Interest rate spread		3.00%
Unsecured Senior Note
During the year:
Average balance		$ 2,946,039	$ 1,843,151	$ 1,800,000
Weighted-average interest rate (as a percent)		6.04%	5.13%	5.07%
Total interest expense		$ 184,304	$ 98,396	$ 95,014
Debt Instrument Unamortized Premium And Debt Issuance Costs Net		$ 3,164,032	$ 2,519,651
Weighted average interest rate (as a percent)		6.15%	5.90%
Carrying value:
Unpaid principal balance		$ 3,200,000	$ 2,550,000
Unamortized debt issuance costs		(35,968)	(30,349)
Amortization of Debt Issuance Costs		6,500	3,800	$ 3,700
Notes payable
Maximum loan amount		$ 3,200,000
Redemption rate (as a percent)		100.00%
Unsecured Senior Note | Before October 15, 2022 with up to 40% principal redeemed
Notes payable
Redemption rate (as a percent)		40.00%
Unsecured Senior Notes One Due October 2025
Notes payable
Maximum loan amount		$ 500,000
Coupon Rate (as a percent)		5.375%
Unsecured Senior Notes Two Due October 2025
Notes payable
Maximum loan amount		$ 150,000
Coupon Rate (as a percent)		5.375%
Unsecured Senior Notes Due February 2029
Notes payable
Maximum loan amount		$ 650,000
Coupon Rate (as a percent)		4.25%
Unsecured Senior Notes Due September 2031
Notes payable
Maximum loan amount		$ 500,000
Coupon Rate (as a percent)		5.75%
Unsecured Senior Notes Due December 2029
Notes payable
Maximum loan amount		$ 750,000
Coupon Rate (as a percent)		7.875%
Unsecured Senior Notes Due November 2030
Notes payable
Maximum loan amount		$ 650,000
Coupon Rate (as a percent)		7.125%
Loan and Security Agreement
Carrying value:
Unpaid principal balance		$ 325,000	150,000
Term Loan Notes Payable
Carrying value:
Unpaid principal balance		$ 1,730,000	$ 1,730,000