Line of Credit, Additional Borrowing Capacity Without Restrictions

No definition available.

Name:	inn_LineofCreditAdditionalBorrowingCapacityWithoutRestrictions
Namespace Prefix:	inn_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Percentage points added to the reference rate to compute the variable rate on the debt instrument.

+ References

No definition available.

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

Face (par) amount of debt instrument at time of issuance.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 470
-SubTopic 20
-Section 50
-Paragraph 1B
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-URI https://asc.fasb.org/extlink&oid=123466505&loc=SL123495323-112611

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+ Details

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Contractual interest rate for funds borrowed, under the debt agreement.

+ References

+ Details

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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

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

- Definition

The number of real estate properties owned as of the balance sheet date.

+ References

No definition available.

+ Details

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Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	instant

- Definition

The cash outflow during the period from the repayment of aggregate short-term and long-term debt. Excludes payment of capital lease obligations.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 15
-Subparagraph (b)
-URI https://asc.fasb.org/extlink&oid=126954810&loc=d3e3291-108585

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Details

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Data Type:	na
Balance Type:
Period Type:

- Details

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Balance Type:
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- Details

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Namespace Prefix:
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- Details

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- Details

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- Details

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DEBT - Term Loans (Details)		1 Months Ended	12 Months Ended
DEBT - Term Loans (Details)	Feb. 15, 2018 USD ($)	May 31, 2022 USD ($) hotel	Dec. 31, 2022 USD ($) hotel room	Dec. 31, 2021 USD ($) room	Dec. 31, 2020 USD ($)	Sep. 26, 2017 USD ($)
Debt Instrument [Line Items]
Repayments of debt			$ 506,898,000	$ 351,932,000	$ 123,748,000
Number of hotel properties \| room			3,984	230
Hotels
Debt Instrument [Line Items]
Number of hotel properties \| hotel			103
Hotels \| Disposed of by Sale \| Hilton Garden Inn - South San Francisco, CA
Debt Instrument [Line Items]
Number of hotel properties \| hotel		169
2018 Term Loan \| Unsecured debt
Debt Instrument [Line Items]
Debt instrument, face amount	$ 225,000,000.0
Additional borrowing capacity	$ 150,000,000
2018 Term Loan \| Unsecured debt \| SOFR
Debt Instrument [Line Items]
Debt, basis spread on variable rate	0.10%
2018 Term Loan \| Unsecured debt \| Minimum \| SOFR
Debt Instrument [Line Items]
Debt, basis spread on variable rate	0.25%
Stated interest rate	1.35%
2018 Term Loan \| Unsecured debt \| Maximum \| SOFR
Debt Instrument [Line Items]
Stated interest rate	2.15%
2017 Term Loan \| Unsecured debt
Debt Instrument [Line Items]
Debt instrument, face amount						$ 225,000,000
Repayments of debt		$ 62,000,000