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DESCRIPTION OF BUSINESS (Details)
Mar. 31, 2015
state
Description of business  
Number of states in which hotel properties are located 21us-gaap_NumberOfStatesInWhichEntityOperates
Hotels  
Description of business  
Number of upscale and upper midscale hotel properties owned 90us-gaap_NumberOfRealEstateProperties
/ us-gaap_MortgageLoansOnRealEstateDescriptionTypeOfPropertyAxis
= us-gaap_HotelMember
Number of guestrooms 11,468us-gaap_NumberOfUnitsInRealEstateProperty
/ us-gaap_MortgageLoansOnRealEstateDescriptionTypeOfPropertyAxis
= us-gaap_HotelMember
TRS Lessees  
Description of business  
Ownership interest in joint venture (as a percent) 100.00%us-gaap_MinorityInterestOwnershipPercentageByParent
/ dei_LegalEntityAxis
= inn_TRSLesseesMember