Quarterly report pursuant to Section 13 or 15(d)

Derivative Financial Instruments - Schedule of Quantitative Information About IRLCs and Fair Value Measurements (Details)

v3.20.2
Derivative Financial Instruments - Schedule of Quantitative Information About IRLCs and Fair Value Measurements (Details)
Sep. 30, 2020
Dec. 31, 2019
Minimum    
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis Valuation Techniques [Line Items]    
Fair value measurements unobservable input 0.00 0.00
Alternative Investment, Measurement Input [Extensible List] ghld:LoanFundingProbabilityPullThroughMember ghld:LoanFundingProbabilityPullThroughMember
Maximum    
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis Valuation Techniques [Line Items]    
Fair value measurements unobservable input 1.00 1.00
Alternative Investment, Measurement Input [Extensible List] ghld:LoanFundingProbabilityPullThroughMember ghld:LoanFundingProbabilityPullThroughMember
Weighted Average    
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis Valuation Techniques [Line Items]    
Fair value measurements unobservable input 0.881 0.894
Alternative Investment, Measurement Input [Extensible List] ghld:LoanFundingProbabilityPullThroughMember ghld:LoanFundingProbabilityPullThroughMember