XML 65 R54.htm IDEA: XBRL DOCUMENT
v3.22.4

Summary of Significant Accounting Policies (Allowance for Loan Losses and Net Investment in Leases) (Details) $ in Millions | Dec. 31, 2022 USD ($) loan | Dec. 31, 2021 USD ($)
--- | --- | ---
Accounting Policies [Abstract] |  |
Accrued interest | $ | $ 0.1 | $ 1.6
Number of impaired loans used as collateral | loan | 2 |

X
- Definition Loan Portfolio, Accrued Interest After Allowance For Credit Loss + References No definition available. + Details
Name: | star_LoanPortfolioAccruedInterestAfterAllowanceForCreditLoss
Namespace Prefix: | star_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Number of Impaired Loans Used as Collateral + References No definition available. + Details
Name: | star_NumberOfImpairedLoansUsedAsCollateral
Namespace Prefix: | star_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | instant

X
- References No definition available. + Details
Name: | us-gaap_AccountingPoliciesAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration