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

X

- 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

X

- References

No definition available.

+ Details

Name:	us-gaap_DebtDisclosureAbstract
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration