FAIR VALUE - Gains and Losses in Earnings (Details) - USD ($) $ in Thousands	3 Months Ended	9 Months Ended
Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Assets:
Gain on origination and sale of loans, net	$ 345,882	$ 262,401	$ 1,302,884	$ 574,768
Losses included in change in fair value of servicing rights	(112,700)	(56,000)	(223,400)	(235,700)
Level 3 \| Contingent Consideration
Liabilities:
Total net (losses) gains included in earnings		(19,670)		(32,650)
Change in unrealized gains relating to assets and liabilities still held at period end		(19,670)		(32,650)
Level 3 \| Servicing Rights, net
Assets:
Total net (losses) gains included in earnings	233,166	206,407	1,079,525	339,096
Change in unrealized gains relating to assets and liabilities still held at period end	326,527	254,130	1,126,433	457,478
Level 3 \| Interest Rate Lock Commitments
Derivatives:
Total net (losses) gains included in earnings	(73,871)	202,144	(387,835)	593,450
Change in unrealized gains relating to assets and liabilities still held at period end	$ 259,210	$ 721,658	$ 259,210	$ 721,658

Fair Value, Asset, Recurring Basis, Still Held, Change In Unrealized Gain (Loss)

No definition available.

Name:	ldi_FairValueAssetRecurringBasisStillHeldChangeInUnrealizedGainLoss
Namespace Prefix:	ldi_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

Fair Value, Liability, Recurring Basis, Still Held, Change In Unrealized Gain (Loss)

+ References

No definition available.

+ Details

Name:	ldi_FairValueLiabilityRecurringBasisStillHeldChangeInUnrealizedGainLoss
Namespace Prefix:	ldi_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

Fair Value, Net Derivative Asset (Liability), Recurring Basis, Still Held, Change In Unrealized Gain (Loss)

+ References

No definition available.

+ Details

Name:	ldi_FairValueNetDerivativeAssetLiabilityRecurringBasisStillHeldChangeInUnrealizedGainLoss
Namespace Prefix:	ldi_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

Servicing Asset At Fair Value, Changes In Fair Value Resulting From Changes In Valuations Or Changes In Assumptions And Others

+ References

No definition available.

+ Details

Name:	ldi_ServicingAssetAtFairValueChangesInFairValueResultingFromChangesInValuationsOrChangesInAssumptionsAndOthers
Namespace Prefix:	ldi_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- References

No definition available.

+ Details

Name:	us-gaap_AssetsFairValueDisclosureAbstract
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- References

No definition available.

+ Details

Name:	us-gaap_DerivativeFairValueOfDerivativeNetAbstract
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Definition

Amount of unrealized gain (loss) recognized in income from asset measured at fair value on recurring basis using unobservable input (level 3) and still held.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 820
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (d)
-URI http://asc.fasb.org/extlink&oid=123874694&loc=d3e19207-110258

+ Details

Name:	us-gaap_FairValueAssetsMeasuredOnRecurringBasisChangeInUnrealizedGainLoss
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

Amount of unrealized gain (loss) recognized in income from liability measured at fair value on recurring basis using unobservable input (level 3) and still held.

+ References

+ Details

Name:	us-gaap_FairValueLiabilitiesMeasuredOnRecurringBasisChangeInUnrealizedGainLoss
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

Amount of unrealized gain (loss) recognized in income for derivative asset (liability) after deduction of derivative liability (asset), measured at fair value using unobservable input (level 3) and still held.

+ References

+ Details

Name:	us-gaap_FairValueNetDerivativeAssetLiabilityMeasuredOnRecurringBasisChangeInUnrealizedGainLoss
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- References

No definition available.

+ Details

Name:	us-gaap_LiabilitiesFairValueDisclosureAbstract
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Definition

The value of new servicing assets, subsequently measured at fair value, acquired or created during the current period through purchases or from transfers of financial assets.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 860
-SubTopic 50
-Section 50
-Paragraph 3
-Subparagraph (a)(2)
-URI http://asc.fasb.org/extlink&oid=125521744&loc=d3e122625-111746

+ Details

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

- Details

Name:	us-gaap_FairValueByFairValueHierarchyLevelAxis=us-gaap_FairValueInputsLevel3Member
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_FairValueByLiabilityClassAxis=ldi_ContingentConsiderationMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_FairValueByAssetClassAxis=ldi_ServicingRightsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_DerivativeInstrumentRiskAxis=us-gaap_InterestRateLockCommitmentsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: