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v3.19.1

Summary of Minimum and Contingent Operating Lease Income (Detail) $ in Thousands | 3 Months Ended
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Mar. 31, 2019 USD ($)
Leases [Abstract] |
Minimum rental income | $ 1,825
Contingent rental income | 201
Total rental income | $ 2,026

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- Definition Operating leases contingent rental income. + References No definition available. + Details
Name: | gden_OperatingLeasesContingentRentalIncome
Namespace Prefix: | gden_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

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- Definition Operating leases minimum rental income. + References No definition available. + Details
Name: | gden_OperatingLeasesMinimumRentalIncome
Namespace Prefix: | gden_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

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- Definition Operating leases rental income net. + References No definition available. + Details
Name: | gden_OperatingLeasesRentalIncomeNet
Namespace Prefix: | gden_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

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