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GOODWILL AND OTHER INTANGIBLES - Land Lease and Water Rights (Details) - Silver Slipper Casino and Hotel - Cure Land Company, LLC - Land Lease and Water Rights $ in Thousands | Dec. 31, 2020 USD ($)
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Goodwill and Other Intangibles [Line Items] |
Excess fair value of land over estimated net present value of land lease payments | $ 970
Fair value of water rights based on current market rate | $ 450

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- Definition land lease represents the excess fair value of the land over the estimated net present value of the land lease payments. + References No definition available. + Details
Name: | fll_FairValueOfLand
Namespace Prefix: | fll_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

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- Definition Water rights represents the fair value of the water rights based upon the current market rate in Hancock County, Mississippi. + References No definition available. + Details
Name: | fll_FairValueOfWaterRights
Namespace Prefix: | fll_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

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

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- Details
Name: | srt_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis=fll_SilverSlipperMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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- Details
Name: | us-gaap_PropertyPlantAndEquipmentByTypeAxis=fll_CureLandCompanyLlcMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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- Details
Name: | us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis=fll_LandLeaseAndWaterRightsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |