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Equity (Details 2) (USD $)	9 Months Ended	12 Months Ended	0 Months Ended
	Sep. 30, 2014	Dec. 31, 2013	Jun. 30, 2014	Mar. 31, 2014
Remaining non-controlling interest acquired	$ 8,232,000us-gaap_PaymentsForRepurchaseOfRedeemableNoncontrollingInterest
Non-controlling interests | SUMMIT HOTEL OP, LP
Number of shares of common stock issuable upon conversion of common units	1inn_LimitedPartnerCapitalAccountUnitsConversionRatio / dei_LegalEntityAxis = inn_SummitHotelOPLPMember / us-gaap_StatementEquityComponentsAxis = us-gaap_NoncontrollingInterestMember
Number of common units of operating partnership owned by unaffiliated third parties	1,025,307us-gaap_LimitedPartnersCapitalAccountUnitsOutstanding / dei_LegalEntityAxis = inn_SummitHotelOPLPMember / us-gaap_StatementEquityComponentsAxis = us-gaap_NoncontrollingInterestMember	811,425us-gaap_LimitedPartnersCapitalAccountUnitsOutstanding / dei_LegalEntityAxis = inn_SummitHotelOPLPMember / us-gaap_StatementEquityComponentsAxis = us-gaap_NoncontrollingInterestMember
Approximate percentage of limited partnership interest in operating partnership	1.00%us-gaap_LimitedLiabilityCompanyLLCOrLimitedPartnershipLPMembersOrLimitedPartnersOwnershipInterest / dei_LegalEntityAxis = inn_SummitHotelOPLPMember / us-gaap_StatementEquityComponentsAxis = us-gaap_NoncontrollingInterestMember	1.00%us-gaap_LimitedLiabilityCompanyLLCOrLimitedPartnershipLPMembersOrLimitedPartnersOwnershipInterest / dei_LegalEntityAxis = inn_SummitHotelOPLPMember / us-gaap_StatementEquityComponentsAxis = us-gaap_NoncontrollingInterestMember
Non-controlling interests | Joint venture
Ownership interest in joint venture (as a percent)				81.00%us-gaap_MinorityInterestOwnershipPercentageByParent / dei_LegalEntityAxis = inn_JointVentureMember / us-gaap_StatementEquityComponentsAxis = us-gaap_NoncontrollingInterestMember
Ownership interest in joint venture by partners (as a percent)				19.00%us-gaap_MinorityInterestOwnershipPercentageByNoncontrollingOwners / dei_LegalEntityAxis = inn_JointVentureMember / us-gaap_StatementEquityComponentsAxis = us-gaap_NoncontrollingInterestMember
Remaining non-controlling interest acquired			$ 8,200,000us-gaap_PaymentsForRepurchaseOfRedeemableNoncontrollingInterest / dei_LegalEntityAxis = inn_JointVentureMember / us-gaap_StatementEquityComponentsAxis = us-gaap_NoncontrollingInterestMember

X

- Definition

Ratio applied to the conversion of limited partner capital account units into equity with equity shares divided by limited partner capital account units.

+ References

No definition available.

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X

- Definition

The number of units or percentage investment held by one or more members or limited partners of the LLC or LP.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 272

-SubTopic 10

-Section 50

-Paragraph 3

-Subparagraph (b)

-URI http://asc.fasb.org/extlink&oid=6373374&loc=d3e70478-108055

+ Details

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X

- Definition

The number of limited partner units outstanding.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 272

-SubTopic 10

-Section 50

-Paragraph 1

-URI http://asc.fasb.org/extlink&oid=6373374&loc=d3e70434-108055



Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 505

-SubTopic 10

-Section S99

-Paragraph 5

-Subparagraph (SAB TOPIC 4.F)

-URI http://asc.fasb.org/extlink&oid=27012166&loc=d3e187171-122770



Reference 3: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Staff Accounting Bulletin (SAB)

-Number Topic 4

-Section F

+ Details

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X

- Definition

The equity interest of noncontrolling shareholders, partners or other equity holders in consolidated entity.

+ References

No definition available.

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- Definition

The parent entity's interest in net assets of the subsidiary, expressed as a percentage.

+ References

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+ Details

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X

- Definition

The cash outflow during the period for redemption of redeemable noncontrolling interests.

+ References

No definition available.

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