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v3.22.4

Debt Obligations, net (Debt Covenants) (Details) | Dec. 31, 2022
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Unsecured Debt |
Debt Instrument [Line Items] |
Unencumbered assets to unsecured indebtedness ratio (at least) | 1.3

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- Definition Represents the minimum ratio of encumbered assets to unsecured indebtedness required under the terms of the debt covenant. + References No definition available. + Details
Name: | star_DebtInstrumentCovenantRatioOfUnencumberedAssetsToUnsecuredIndebtedness
Namespace Prefix: | star_
Data Type: | xbrli:pureItemType
Balance Type: | na
Period Type: | instant

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

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- Details
Name: | us-gaap_LongtermDebtTypeAxis=us-gaap_UnsecuredDebtMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |