XML 84 R74.htm IDEA: XBRL DOCUMENT v3.10.0.1

Debt Obligations, net (Debt Covenants) (Details)	Sep. 30, 2018
Unsecured Credit Facilities
Debt Instrument [Line Items]
Minimum ratio of unencumbered assets to unsecured indebtedness (at least)	1.2
Debt instrument covenant multiple of minimum fixed charges on outstanding borrowings	1.5
2016 Senior Term Loan
Debt Instrument [Line Items]
Multiple of the minimum collateral coverage on outstanding borrowings (at least)	1.25
2015 $325 Million Secured Revolving Credit Facility
Debt Instrument [Line Items]
Debt instrument covenant multiple of minimum fixed charges on outstanding borrowings	1.5
Multiple of the minimum collateral coverage on outstanding borrowings (at least)	1.5

X

- Definition

Represents the multiple of the minimum collateral coverage on outstanding borrowings required under the terms of the debt covenant.

+ References

No definition available.

+ Details

Name:	star_DebtInstrumentCovenantMultipleofMinimumCollateralCoverageonOutstandingBorrowings
Namespace Prefix:	star_
Data Type:	xbrli:pureItemType
Balance Type:	na
Period Type:	instant

X

- Definition

Debt Instrument, Covenant, Multiple of Minimum Fixed Charges on Outstanding Borrowings

+ References

No definition available.

+ Details

Name:	star_DebtInstrumentCovenantMultipleofMinimumFixedChargesonOutstandingBorrowings
Namespace Prefix:	star_
Data Type:	xbrli:pureItemType
Balance Type:	na
Period Type:	instant

X

- 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

X

- 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

X

- Details

Name:	us-gaap_LongtermDebtTypeAxis=star_UnsecuredCreditFacilitiesMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_LongtermDebtTypeAxis=star_A2016SeniorSecuredCreditFacilityMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_LongtermDebtTypeAxis=star_SecuredCreditFacilityRevolverDueMarch2018Member
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: