Number of persons employed by the Entity

No definition available.

Name:	dei_EntityNumberOfEmployees
Namespace Prefix:	dei_
Data Type:	xbrli:decimalItemType
Balance Type:	na
Period Type:	instant

- Definition

Represents the service agreements entered into by the entity for availing services from other entities.

+ References

No definition available.

+ Details

Name:	svc_NumberOfServiceAgreements
Namespace Prefix:	svc_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	instant

- Definition

Related Party Property Management And Construction Management Fee And Construction Supervision

+ References

No definition available.

+ Details

Name:	svc_RelatedPartyPropertyManagementAndConstructionManagementFeeAndConstructionSupervision
Namespace Prefix:	svc_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

Total expense amount to reimburse a related party.

+ References

No definition available.

+ Details

Name:	svc_RelatedPartyReimbursementExpense
Namespace Prefix:	svc_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

Represents the business management fees incurred pursuant to business management agreement with related parties.

+ References

No definition available.

+ Details

Name:	svc_RelatedPartyTransactionBusinessManagementFees
Namespace Prefix:	svc_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

Related Party Transaction, Estimated Incentive Fee Calculation Period

+ References

No definition available.

+ Details

Name:	svc_RelatedPartyTransactionEstimatedIncentiveFeeCalculationPeriod
Namespace Prefix:	svc_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

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

- Definition

Amount of transactions with related party during the financial reporting period.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 850
-SubTopic 10
-Section 50
-Paragraph 1
-Subparagraph (c)
-URI http://asc.fasb.org/extlink&oid=6457730&loc=d3e39549-107864

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 850
-SubTopic 10
-Section 50
-Paragraph 3
-URI http://asc.fasb.org/extlink&oid=6457730&loc=d3e39603-107864

+ Details

Name:	us-gaap_RelatedPartyTransactionAmountsOfTransaction
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

Expenses recognized resulting from transactions (excluding transactions that are eliminated in consolidated or combined financial statements) with related party.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 850
-SubTopic 10
-Section 50
-Paragraph 1
-Subparagraph (c)
-URI http://asc.fasb.org/extlink&oid=6457730&loc=d3e39549-107864

+ Details

Name:	us-gaap_RelatedPartyTransactionExpensesFromTransactionsWithRelatedParty
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

Identify the stated interest rate per the agreement, for example, leasing and debt arrangements between related parties.

+ References

No definition available.

+ Details

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

- Details

Name:	us-gaap_RelatedPartyTransactionsByRelatedPartyAxis=svc_ReitManagementAndResearchLLCMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_TransactionTypeAxis=svc_AmendedAndRestateBusinessManagementAgreementMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_RelatedPartyTransactionAxis=svc_PropertyManagementFeesMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_RelatedPartyTransactionAxis=svc_ConstructionAndSupervisionFeesCapitalizedMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

Business and Property Management Agreements with RMR (Details) $ in Thousands		3 Months Ended
	Jun. 22, 2021	Mar. 31, 2022 USD ($) employee agreement	Mar. 31, 2021 USD ($)
Real Estate Properties [Line Items]
Number of employees \| employee		0
RMR LLC
Real Estate Properties [Line Items]
Incentive fee calculation period		3 years
Related party property management and construction management fee		$ 1,663	$ 804
RMR LLC \| Amended And Restate Business Management Agreement
Real Estate Properties [Line Items]
Number of management service agreements \| agreement		2
Business management fees incurred		$ 9,878	10,299
Related party reimbursement expenses		764	744
RMR LLC \| Property Management Fees
Real Estate Properties [Line Items]
Related party expenses		1,018	802
Related party, percentage fee	3.00%
RMR LLC \| Construction and Supervision Fees Capitalized
Real Estate Properties [Line Items]
Related party transaction amount		$ 645	$ 2