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Other Long-Term Obligations (Details) (USD $)
In Thousands, unless otherwise specified
0 Months Ended
May 04, 2015
Apr. 26, 2015
Nemacolin    
Other long-term obligations    
Asset of property and equipment, net of accumulated depreciation recorded under ASC 840   $ 5,904isle_CapitalLeasedAssetsNet
/ isle_DevelopmentProjectsAxis
= isle_NemacolinWoodlandsResortMember
Liability under ASC 840   6,100us-gaap_CapitalLeaseObligationsNoncurrent
/ isle_DevelopmentProjectsAxis
= isle_NemacolinWoodlandsResortMember
Quad-Cities Waterfront Convention Center    
Other long-term obligations    
Liability under ASC 840   16,111us-gaap_CapitalLeaseObligationsNoncurrent
/ isle_DevelopmentProjectsAxis
= isle_QuadCitiesWaterfrontConventionCenterMember
Quad-Cities Waterfront Convention Center | Subsequent event    
Other long-term obligations    
Repayments of Notes Payable $ 9,400us-gaap_RepaymentsOfNotesPayable
/ isle_DevelopmentProjectsAxis
= isle_QuadCitiesWaterfrontConventionCenterMember
/ us-gaap_SubsequentEventTypeAxis
= us-gaap_SubsequentEventMember