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Subsequent Events (Details Textual) - USD ($) | Nov. 08, 2018 | Nov. 07, 2018 | Sep. 30, 2018
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Revolving Credit Facility [Member] | Senior Secured First Lien Credit Facility [Member] |  |  |
Subsequent Event [Line Items] |  |  |
Line of Credit Facility, Maximum Borrowing Capacity |  |  | $ 140,000,000
Subsequent Event [Member] | Revolving Credit Facility [Member] | Incremental Joinder Agreement No. 2 [Member] |  |  |
Subsequent Event [Line Items] |  |  |
Agreement start date | Nov. 08, 2018 |  |
Subsequent Event [Member] | Revolving Credit Facility [Member] | Incremental Joinder Agreement No. 2 [Member] | Senior Secured First Lien Credit Facility [Member] |  |  |
Subsequent Event [Line Items] |  |  |
Line of Credit Facility, Maximum Borrowing Capacity | $ 200,000,000 | $ 140,000,000 |
Subsequent Event [Member] | Maximum [Member] |  |  |
Subsequent Event [Line Items] |  |  |
Common stock repurchase, authorized |  | $ 25,000,000 |

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- Definition Agreement start date. + References No definition available. + Details
Name: | gden_AgreementStartDate
Namespace Prefix: | gden_
Data Type: | xbrli:dateItemType
Balance Type: | na
Period Type: | duration

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- Definition Maximum borrowing capacity under the credit facility without consideration of any current restrictions on the amount that could be borrowed or the amounts currently outstanding under the facility. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.19(b),22(b)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
Name: | us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

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- Definition Amount of stock repurchase plan authorized. + References No definition available. + Details
Name: | us-gaap_StockRepurchaseProgramAuthorizedAmount1
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

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- Definition Detail information of subsequent event by type. User is expected to use existing line items from elsewhere in the taxonomy as the primary line items for this disclosure, which is further associated with dimension and member elements pertaining to a subsequent event. + References No definition available. + Details
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Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

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- Details
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Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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- Details
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Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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- Details
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Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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- Details
Name: | us-gaap_TypeOfArrangementAxis=gden_IncrementalJoinderAgreementNumberTwoMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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- Details
Name: | srt_RangeAxis=srt_MaximumMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |