Investments in and Advances to Joint Ventures - Condensed Combined Statements of Operations of Unconsolidated Joint Venture Investments (Parenthetical) (Detail) - USD ($) $ in Millions	12 Months Ended
Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Income Statement [Abstract]
Company's proportionate share of the impairment charges	$ 1.9	$ 2.5	$ 13.1

The proportionate share of total impairment charges of its equity method investee.

No definition available.

Name:	sitc_CompanyProportionateShareOfImpairmentCharges
Namespace Prefix:	sitc_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration