Mortgage Servicing Rights - Additional Information (Details) - USD ($) $ in Thousands	3 Months Ended	9 Months Ended
Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021	Dec. 31, 2021
Mortgage Servicing Rights [Line Items]
Aggregate unpaid principal balance	$ 4,305,686		$ 4,305,686		$ 3,314,952
Net proceeds from sale of mortgage servicing rights			1,171,430	$ 241,634
MSR
Mortgage Servicing Rights [Line Items]
Aggregate unpaid principal balance	306,000,000		306,000,000		$ 319,800,000
MSRs sold			101,300,000	22,700,000
Net proceeds from sale of mortgage servicing rights			1,200,000	269,900
Reserves and transaction costs on sales of servicing rights	$ 9,051	$ 14,895	$ 47,007	$ 14,895

The cash inflow from the sale of servicing rights, which contractually entitle the servicer to receive fees and ancillary revenues for performing billing, collection, disbursement and recordkeeping services in connection with a mortgage portfolio. Rights may be obtained via (1) acquisition or assumption of a servicing obligation that does not relate to financial assets of the servicer or its consolidated affiliates; or (2) by originating mortgage loans and then (a) transferring the loans to a Variable Interest Entity (VIE) in a transaction that meets the necessary transfer and classification requirements, or (b) transferring the loans in a transaction that meets the requirements for sale accounting.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 12
-URI https://asc.fasb.org/extlink&oid=126954810&loc=d3e3179-108585

Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 860
-SubTopic 20
-Section 50
-Paragraph 3
-Subparagraph (d)
-URI https://asc.fasb.org/extlink&oid=121570589&loc=d3e107207-111719

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration