DERIVATIVE FINANCIAL INSTRUMENTS AND HEDGING - Schedule of Derivative Financial Instruments (Details) - Designated as hedges - USD ($) $ in Thousands	Dec. 31, 2023	Dec. 31, 2022
Derivative [Line Items]
Notional Amount	$ 400,000	$ 600,000
Fair Value	11,454	16,841
GIC Joint Venture Credit Facility and Term Loans
Derivative [Line Items]
Notional Amount	200,000	0
Fair Value	2,504	0
Interest rate swaps
Derivative [Line Items]
Notional Amount	600,000	600,000
Fair Value	$ 13,958	16,841
Interest Rate Swap Expiring January 31, 2023 One
Derivative [Line Items]
Average Annual Effective Fixed Rate	1.96%
Notional Amount	$ 0	100,000
Fair Value	$ 0	208
Interest Rate Swap Expiring January 31, 2023 Two
Derivative [Line Items]
Average Annual Effective Fixed Rate	1.98%
Notional Amount	$ 0	100,000
Fair Value	$ 0	210
Interest Rate Swap Expiring September 30, 2024
Derivative [Line Items]
Average Annual Effective Fixed Rate	2.86%
Notional Amount	$ 75,000	75,000
Fair Value	$ 1,170	2,219
Interest Rate Swap Expiring December 31, 2025
Derivative [Line Items]
Average Annual Effective Fixed Rate	2.92%
Notional Amount	$ 125,000	125,000
Fair Value	$ 2,877	4,211
Interest Rate Swap Expiring January 31, 2027
Derivative [Line Items]
Average Annual Effective Fixed Rate	2.60%
Notional Amount	$ 100,000	100,000
Fair Value	$ 3,134	4,366
Interest Rate Swap Expiring January 31, 2029
Derivative [Line Items]
Average Annual Effective Fixed Rate	2.56%
Notional Amount	$ 100,000	100,000
Fair Value	$ 4,273	5,627
Interest Rate Swap Expiring January 13, 2026 One \| GIC Joint Venture Credit Facility and Term Loans
Derivative [Line Items]
Average Annual Effective Fixed Rate	3.35%
Notional Amount	$ 100,000	0
Fair Value	$ 1,254	0
Interest Rate Swap Expiring January 13, 2026 Two \| GIC Joint Venture Credit Facility and Term Loans
Derivative [Line Items]
Average Annual Effective Fixed Rate	3.35%
Notional Amount	$ 100,000	0
Fair Value	$ 1,250	$ 0

Fair values as of the balance sheet date of the net amount of all assets and liabilities resulting from contracts that meet the criteria of being accounted for as derivative instruments.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Name Accounting Standards Codification
-Section 45
-Paragraph 5
-SubTopic 10
-Topic 815
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147480463/815-10-45-5

+ Details

Name:	us-gaap_DerivativeAssetsLiabilitiesAtFairValueNet
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

Average fixed interest rate related to the group of interest rate derivatives.

+ References

No definition available.

+ Details

Name:	us-gaap_DerivativeAverageFixedInterestRate
Namespace Prefix:	us-gaap_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	instant

- Definition

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.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 815
-SubTopic 40
-Name Accounting Standards Codification
-Section 50
-Paragraph 5
-Subparagraph (f)
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147480237/815-40-50-5

+ Details

Name:	us-gaap_DerivativeLineItems
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Definition

Nominal or face amount used to calculate payment on derivative.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 815
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 1B
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147480434/815-10-50-1B

Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 815
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 1A
-Subparagraph (d)
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147480434/815-10-50-1A

+ Details

Name:	us-gaap_DerivativeNotionalAmount
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	na
Period Type:	instant

- Details

Name:	us-gaap_HedgingDesignationAxis=us-gaap_DesignatedAsHedgingInstrumentMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_DebtInstrumentAxis=inn_GICJointVentureCreditFacilityAndTermLoansMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_DerivativeInstrumentRiskAxis=us-gaap_InterestRateSwapMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_DerivativeInstrumentRiskAxis=inn_InterestRateSwapExpiringJanuary312023OneMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_DerivativeInstrumentRiskAxis=inn_InterestRateSwapExpiringJanuary312023TwoMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_DerivativeInstrumentRiskAxis=inn_InterestRateSwapExpiringSeptember302024Member
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_DerivativeInstrumentRiskAxis=inn_InterestRateSwapExpiringDecember312025Member
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_DerivativeInstrumentRiskAxis=inn_InterestRateSwapExpiringJanuary312027Member
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_DerivativeInstrumentRiskAxis=inn_InterestRateSwapExpiringJanuary312029Member
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_DerivativeInstrumentRiskAxis=inn_InterestRateSwapExpiringJanuary132026OneMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_DerivativeInstrumentRiskAxis=inn_InterestRateSwapExpiringJanuary132026TwoMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: