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

X

- Definition

Operating leases contingent rental income.

+ References

No definition available.

+ Details

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Namespace Prefix:	gden_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

X

- 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

X

- 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

X

- References

No definition available.

+ Details

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