MORTGAGE SERVICING RIGHTS AND MSR FINANCING RECEIVABLES - Schedule of Carrying Value of Investments in MSRs and MSR Financing Receivables (Details) $ in Thousands	3 Months Ended
Mar. 31, 2023 USD ($)
Activity related to carrying value of investments in mortgage servicing rights [Roll Forward]
Beginning balance	$ 8,889,403
Purchases, net	0
Originations	140,513
Proceeds from sales	(1,403)
Amortization of servicing rights	(105,691)
Change in valuation inputs and assumptions	(37,302)
(Gain) loss realized	689
Ending balance	$ 8,886,209

Gain (Loss) On Sale Of Mortgage Servicing Rights Financing Receivables

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- Definition

Mortgage Servicing Rights

+ References

No definition available.

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- Definition

Servicing Asset at Fair Value, Additions, Net Of Purchase Price Adjustments

+ References

No definition available.

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- Definition

Servicing Assets At Fair Value, Originations

+ References

No definition available.

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- Definition

The periodic amortization (in proportion to and over the period of estimated net servicing income or loss) of capitalized 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. As a noncash expense, this element is added back to net income when calculating cash provided by or used in operations using the indirect method.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 28
-Subparagraph (b)
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-Publisher FASB
-Name Accounting Standards Codification
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-SubTopic 50
-Section 50
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-Subparagraph (a)(4)
-URI https://asc.fasb.org/extlink&oid=128311188&loc=d3e122739-111746

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- Definition

Fair value of an asset representing net future revenue from contractually specified servicing fees, late charges, and other ancillary revenues, in excess of future costs related to servicing arrangements.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 860
-SubTopic 50
-Section 45
-Paragraph 2
-Subparagraph (b)
-URI https://asc.fasb.org/extlink&oid=6469459&loc=d3e122501-111745

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-Publisher FASB
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-Publisher FASB
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-Publisher FASB
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- Definition

Amount of increase (decrease) in fair value from changes in the inputs, assumptions, or model used to calculate the fair value of the contract to service financial assets under which the benefits of servicing are expected to more than adequately compensate the servicer.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 860
-SubTopic 50
-Section 50
-Paragraph 3
-Subparagraph (a)(4)(i)
-URI https://asc.fasb.org/extlink&oid=128311188&loc=d3e122625-111746

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- Definition

Decrease in servicing assets subsequently measured at fair value resulting from conveyance of servicing rights to unrelated parties.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 860
-SubTopic 50
-Section 50
-Paragraph 3
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-URI https://asc.fasb.org/extlink&oid=128311188&loc=d3e122625-111746

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