Other Assets and Intangibles, net - Summary of Estimated Net Future Amortization Associated with Above and Below-Market Leases (Detail) $ in Millions	12 Months Ended
Dec. 31, 2020 USD ($)
Intangible Assets Net Excluding Goodwill [Abstract]
Future amortization income, 2021	$ 3.6
Future amortization income, 2022	3.9
Future amortization income, 2023	3.9
Future amortization income, 2024	3.9
Future amortization income, 2025	$ 3.9

- Definition

The amount of amortization income, net associated with above and below market leases expected to be recognized during next twelve months of the five succeeding fiscal years.

+ References

No definition available.

+ Details

Name:	sitc_FutureAmortizationIncomeNextTwelveMonths
Namespace Prefix:	sitc_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

The amount of amortization income, net associated with above and below market leases expected to be recognized during year five of the five succeeding fiscal years.

+ References

No definition available.

+ Details

Name:	sitc_FutureAmortizationIncomeYearFive
Namespace Prefix:	sitc_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

The amount of amortization income, net associated with above and below market leases expected to be recognized during year four of the five succeeding fiscal years.

+ References

No definition available.

+ Details

Name:	sitc_FutureAmortizationIncomeYearFour
Namespace Prefix:	sitc_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

The amount of amortization income, net associated with above and below market leases expected to be recognized during year three of the five succeeding fiscal years.

+ References

No definition available.

+ Details

Name:	sitc_FutureAmortizationIncomeYearThree
Namespace Prefix:	sitc_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

The amount of amortization income, net associated with above and below market leases expected to be recognized during year two of the five succeeding fiscal years.

+ References

No definition available.

+ Details

Name:	sitc_FutureAmortizationIncomeYearTwo
Namespace Prefix:	sitc_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- References

No definition available.

+ Details

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