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v3.20.2

Long-term Debt (Parenthetical) (Details) | 6 Months Ended
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Jun. 30, 2020
Debt Disclosure [Abstract] |
Unsecured notes maturity year | 2026

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- Definition DebtInstrument maturity date year. + References No definition available. + Details
Name: | gden_DebtInstrumentMaturityDateYear
Namespace Prefix: | gden_
Data Type: | xbrli:gYearItemType
Balance Type: | na
Period Type: | duration

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