DERIVATIVE FINANCIAL INSTRUMENTS AND HEDGING - Schedule of Derivative Financial Instruments (Details) - Designated as hedges - USD ($) $ in Thousands	Dec. 31, 2022	Dec. 31, 2021
Interest rate swaps
Derivative [Line Items]
Notional Amount	$ 600,000	$ 400,000
Fair Value	$ 16,841	(15,723)
Interest Rate Swap Expiring January 31, 2023 One
Derivative [Line Items]
Average Annual Effective Fixed Rate	1.96%
Notional Amount	$ 100,000	100,000
Fair Value	$ 208	(1,617)
Interest Rate Swap Expiring January 31, 2023 Two
Derivative [Line Items]
Average Annual Effective Fixed Rate	1.98%
Notional Amount	$ 100,000	100,000
Fair Value	$ 210	(1,629)
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	$ 2,219	(3,831)
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	$ 4,211	(8,646)
Interest Rate Swap Expiring January 31, 2027
Derivative [Line Items]
Average Annual Effective Fixed Rate	2.60%
Notional Amount	$ 100,000	0
Fair Value	$ 4,366	0
Interest Rate Swap Expiring January 31, 2029
Derivative [Line Items]
Average Annual Effective Fixed Rate	2.56%
Notional Amount	$ 100,000	0
Fair Value	$ 5,627	$ 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
-Publisher FASB
-Name Accounting Standards Codification
-Topic 815
-SubTopic 10
-Section 45
-Paragraph 5
-URI https://asc.fasb.org/extlink&oid=126966630&loc=d3e41228-113958

+ 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

No definition available.

+ 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
-Publisher FASB
-Name Accounting Standards Codification
-Topic 815
-SubTopic 10
-Section 50
-Paragraph 1B
-URI https://asc.fasb.org/extlink&oid=125515794&loc=SL5580258-113959

Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 815
-SubTopic 10
-Section 50
-Paragraph 1A
-Subparagraph (d)
-URI https://asc.fasb.org/extlink&oid=125515794&loc=SL5579245-113959

+ 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_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: