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Loans Receivable and Other Lending Investments, net (Troubled Debt Restructurings) (Details) (USD $) | 12 Months Ended
--- | ---
Dec. 31, 2014 loans | Dec. 31, 2013 loans
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Number of Loans |  | 6star_FinanceReceivableTroubledLoans
Unfunded commitments, troubled debt restructurings | $ 0star_FinancingReceivableModificationsUnfundedCommitments |
Senior mortgages |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Number of Loans | 1star_FinanceReceivableTroubledLoans / us-gaap_FinancingReceivableTroubledDebtRestructuringAxis = us-gaap_FirstMortgageMember | 6star_FinanceReceivableTroubledLoans / us-gaap_FinancingReceivableTroubledDebtRestructuringAxis = us-gaap_FirstMortgageMember
Pre-Modification Outstanding Recorded Investment | 7,040,000star_FinancingReceivablePreModificationRecordedInvestment / us-gaap_FinancingReceivableTroubledDebtRestructuringAxis = us-gaap_FirstMortgageMember | 179,030,000star_FinancingReceivablePreModificationRecordedInvestment / us-gaap_FinancingReceivableTroubledDebtRestructuringAxis = us-gaap_FirstMortgageMember
Post-Modification Outstanding Recorded Investment | 7,040,000star_FinancingReceivablePostModificationRecordedInvestment / us-gaap_FinancingReceivableTroubledDebtRestructuringAxis = us-gaap_FirstMortgageMember | 154,278,000star_FinancingReceivablePostModificationRecordedInvestment / us-gaap_FinancingReceivableTroubledDebtRestructuringAxis = us-gaap_FirstMortgageMember
Performing senior mortgages |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Number of Loans |  | 2star_FinanceReceivableTroubledLoans / us-gaap_FinancingReceivableTroubledDebtRestructuringAxis = star_PerformingFirstMortgageMember
Non-performing senior mortgages |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Number of Loans | 1star_FinanceReceivableTroubledLoans / us-gaap_FinancingReceivableTroubledDebtRestructuringAxis = star_NonPerformingFirstMortgageMember | 2star_FinanceReceivableTroubledLoans / us-gaap_FinancingReceivableTroubledDebtRestructuringAxis = star_NonPerformingFirstMortgageMember
Recorded investment of loans whose maturity was extended |  | 174,500,000star_FinancingReceivableModificationsRecordedInvestmentOfContractsWhoseMaturityExtended / us-gaap_FinancingReceivableTroubledDebtRestructuringAxis = star_NonPerformingFirstMortgageMember
Financing receivable modifications recorded investment of contracts whose maturity extended and reduced principal |  | 98,300,000star_FinancingReceivableModificationsRecordedInvestmentOfContractsWhoseMaturityExtendedAndReducedPrincipal / us-gaap_FinancingReceivableTroubledDebtRestructuringAxis = star_NonPerformingFirstMortgageMember
Repayment of debt |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Recorded investment of loans whose maturity was extended |  | 15,400,000star_FinancingReceivableModificationsRecordedInvestmentOfContractsWhoseMaturityExtended / us-gaap_FinancingReceivableTroubledDebtRestructuringAxis = star_RepaymentofDebtInstrumentsMember
One Year Payment Extension | Performing senior mortgages |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Recorded investment of loans whose maturity was extended |  | 4,600,000star_FinancingReceivableModificationsRecordedInvestmentOfContractsWhoseMaturityExtended / us-gaap_FinancingReceivableTroubledDebtRestructuringAxis = star_PerformingFirstMortgageMember / star_LoanPaymentExtensionPeriodAxis = star_OneYearPaymentExtensionMember
Finance receivable, trouble debt restructuring time period |  | 1 year
One Year Payment Extension | Non-performing senior mortgages |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Recorded investment of loans whose maturity was extended | $ 7,000,000star_FinancingReceivableModificationsRecordedInvestmentOfContractsWhoseMaturityExtended / us-gaap_FinancingReceivableTroubledDebtRestructuringAxis = star_NonPerformingFirstMortgageMember / star_LoanPaymentExtensionPeriodAxis = star_OneYearPaymentExtensionMember |
Finance receivable, trouble debt restructuring time period | 1 year |

X
- Definition Represents the weighted average maturity period of loans. + References No definition available. + Details
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- Definition The number of financing receivables that have been modified by troubled debt restructurings. + References No definition available. + Details
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- Definition Represents the amount of the outstanding recorded investment related to financing receivables for which the maturity was extended and that has been modified by troubled debt restructurings. + References No definition available. + Details
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- Definition Recorded investment of financing Receivable whose maturity was extended and principal was reduced + References No definition available. + Details
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X
- Definition The amount of the outstanding recorded investment related to financing receivables that have been modified by troubled debt restructurings after the financing receivable has been modified. + References No definition available. + Details
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Namespace Prefix: | star_
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X
- Definition The amount of the outstanding recorded investment related to financing receivables that have been modified by troubled debt restructurings before the financing receivable has been modified. + References No definition available. + Details
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Namespace Prefix: | star_
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- Details
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- Details
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- Details
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