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Other Assets and Intangibles, net - Components of Other Assets and Intangibles (Parenthetical) (Detail) - USD ($) $ in Millions | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2021 | Sep. 30, 2020 | Sep. 30, 2021 | Sep. 30, 2020
Intangible Assets Net Excluding Goodwill [Abstract] |  |  |  |
Amortization expense | $ 5.3 | $ 3.2 | $ 16.3 | $ 10.3

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- Definition Amortization of intangible assets excluding above and below market leases. + References No definition available. + Details
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Namespace Prefix: | sitc_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

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- References No definition available. + Details
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Namespace Prefix: | us-gaap_
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Balance Type: | na
Period Type: | duration