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Notes Receivable - Loans Receivable on Real Estate (Detail) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2018 | Dec. 31, 2017 | Dec. 31, 2016
Receivables [Abstract] |  |  |
Balance at January 1 | $ 19,675 | $ 49,488 |
Additions: |  |  |
Interest | 1,839 | 2,276 |
Accretion of discount | 0 | 269 | $ 1,038
Deductions: |  |  |
Collections of principal and interest | (1,839) | (32,358) |
Balance at December 31 | $ 19,675 | $ 19,675 | $ 49,488

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- Definition Additions. + References No definition available. + Details
Name: | sitc_AdditionsAbstract
Namespace Prefix: | sitc_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

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- Definition Collections of principal and interest. + References No definition available. + Details
Name: | sitc_CollectionsOfPrincipalAndInterest
Namespace Prefix: | sitc_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

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- Definition Deductions. + References No definition available. + Details
Name: | sitc_DeductionsAbstract
Namespace Prefix: | sitc_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

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- Definition The amount of accretion of discount recorded on mortgage loans on real estate during the reporting period. + References No definition available. + Details
Name: | sitc_MortgageLoansOnRealEstateAccretionOfDiscount
Namespace Prefix: | sitc_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

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- Definition Mortgage loans on real estate interest. + References No definition available. + Details
Name: | sitc_MortgageLoansOnRealEstateInterest
Namespace Prefix: | sitc_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

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- Definition Amount of the investment in a contractual right to receive money on demand or on fixed or determinable dates that is recognized as an asset in the creditor's statement of financial position related to mortgage loans receivable. + References No definition available. + Details
Name: | sitc_MortgageLoansReceivableBalance
Namespace Prefix: | sitc_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

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- References No definition available. + Details
Name: | us-gaap_ReceivablesAbstract
Namespace Prefix: | us-gaap_
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