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BASIS OF PRESENTATION AND SIGNIFICANT ACCOUNTING POLICIES (Details)
3 Months Ended
Mar. 31, 2015
item
Mar. 31, 2014
Segment Disclosure    
Number of reportable segments 1us-gaap_NumberOfReportableSegments  
Noncontrolling Interest | Joint venture    
Noncontrolling Interest [Abstract]    
Third-party ownership (as a percent)   19.00%us-gaap_MinorityInterestOwnershipPercentageByNoncontrollingOwners
/ dei_LegalEntityAxis
= inn_JointVentureMember
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_NoncontrollingInterestMember
Hotel building and improvements | Minimum    
INVESTMENT IN HOTEL PROPERTIES, NET    
Estimated Useful Lives 25 years  
Hotel building and improvements | Maximum    
INVESTMENT IN HOTEL PROPERTIES, NET    
Estimated Useful Lives 40 years  
Furniture, fixtures and equipment | Minimum    
INVESTMENT IN HOTEL PROPERTIES, NET    
Estimated Useful Lives 2 years  
Furniture, fixtures and equipment | Maximum    
INVESTMENT IN HOTEL PROPERTIES, NET    
Estimated Useful Lives 15 years