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Impairment Charges and Reserves - Summary of Significant Unobservable Inputs (Parenthetical) (Detail)	12 Months Ended
	Dec. 31, 2017
Weighted Average [Member]
Schedule Of Investments [Line Items]
Terminal capitalization rate, Weighted-average rate	8.80%

X

- Definition

Fair value inputs terminal cap rate.

+ References

No definition available.

+ Details

Name:	sitc_FairValueInputsTerminalCapRate
Namespace Prefix:	sitc_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

X

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

X

- Details

Name:	srt_RangeAxis=srt_WeightedAverageMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: