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Unrecognized cost of unvested share-based compensation awards to be recognized during the fourth fiscal year following the latest fiscal year.

No definition available.

Name:	inn_EmployeeServiceShareBasedCompensationNonvestedAwardsCompensationCostYearFour
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Unrecognized cost of unvested share-based compensation awards to be recognized during the third fiscal year following the latest fiscal year.

No definition available.

Name:	inn_EmployeeServiceShareBasedCompensationNonvestedAwardsCompensationCostYearThree
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Data Type:	xbrli:monetaryItemType
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Unrecognized cost of unvested share-based compensation awards to be recognized during the second fiscal year following the latest fiscal year.

No definition available.

Name:	inn_EmployeeServiceShareBasedCompensationNonvestedAwardsCompensationCostYearTwo
Namespace Prefix:	inn_
Data Type:	xbrli:monetaryItemType
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This concept does not have a custom type definition

No definition available.

Name:	inn_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostToBeRecognizedAbstract
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Employee Service Share-based Compensation, Nonvested Awards, Compensation Cost Year Five

No definition available.

Name:	inn_EmployeeServiceSharebasedCompensationNonvestedAwardsCompensationCostYearFive
Namespace Prefix:	inn_
Data Type:	xbrli:monetaryItemType
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Represents the expense recognized during the period arising from equity-based compensation arrangements (for example, shares of stock, unit, stock options or other equity instruments) with employees, directors and certain consultants qualifying for treatment as employees.

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SAB Topic 14.F)
-URI http://asc.fasb.org/extlink&oid=27013229&loc=d3e301413-122809

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 1
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=96867065&loc=d3e5047-113901

Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (h)(1)(i)
-URI http://asc.fasb.org/extlink&oid=96867065&loc=d3e5070-113901

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Unrecognized cost of unvested share-based compensation awards.

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (i)
-URI http://asc.fasb.org/extlink&oid=96867065&loc=d3e5070-113901

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Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

No definition available.

Name:	us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems
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Data Type:	xbrli:stringItemType
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Period Type:	duration

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Name:	inn_VestingCriteriaAxis=inn_VestingBasedOnServiceMember
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Name:	inn_VestingCriteriaAxis=inn_VestingBasedOnPerformanceMember
Namespace Prefix:
Data Type:	na
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Namespace Prefix:
Data Type:	na
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Name:	us-gaap_AwardTypeAxis=us-gaap_StockCompensationPlanMember
Namespace Prefix:
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