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v3.20.1

Long-term Debt (Parenthetical) (Details) | 12 Months Ended
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Dec. 31, 2019
Debt Disclosure [Abstract] |
Senior notes maturity year | 2026

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

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