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Other Assets and Intangibles - Summary of Amortization Expense Related to the Intangibles, Excluding Above and Below-Market Leases (Detail) - USD ($) $ in Millions | 12 Months Ended
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Dec. 31, 2018 | Dec. 31, 2017 | Dec. 31, 2016
Intangible Assets Net Excluding Goodwill [Abstract] |  |  |
Amortization expense | $ 34.2 | $ 60.7 | $ 72.1

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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_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration