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COMMITMENTS AND CONTINGENCIES - Additional Information (Details) - USD ($) $ in Millions | Jun. 30, 2024 | Dec. 31, 2023
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Commitments and Contingencies Disclosure [Abstract] |  |
Total commitments to originate loans | $ 1,800.0 | $ 821.9
Total commitments related to derivatives | 1,900.0 | 933.9
Reverse mortgage loans borrowers | 116.9 | 107.3
Short-term commitments to lend | $ 2.3 | $ 0.3

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- Definition Commitments to fund derivatives. + References No definition available. + Details
Name: | ghld_CommitmentsToFundDerivatives
Namespace Prefix: | ghld_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

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- Definition Commitments to purchase and fund mortgage loans. + References No definition available. + Details
Name: | ghld_CommitmentsToPurchaseAndFundMortgageLoans
Namespace Prefix: | ghld_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

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- Definition Commitments To Purchase Reverse Mortgage Loans Borrowers, Additional Borrowing capacity + References No definition available. + Details
Name: | ghld_CommitmentsToPurchaseReverseMortgageLoansBorrowersAdditionalBorrowingCapacity
Namespace Prefix: | ghld_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Short-term Commitments To Lend + References No definition available. + Details
Name: | ghld_ShortTermCommitmentsToLend
Namespace Prefix: | ghld_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- References No definition available. + Details
Name: | us-gaap_CommitmentsAndContingenciesDisclosureAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration