XML 57 R48.htm IDEA: XBRL DOCUMENT v3.21.2

Real Estate (Net Lease Venture) (Details)	Jun. 30, 2021
Schedule of Equity Method Investments [Line Items]
Asset acquisition, partner ownership percentage	47.50%
iStar Net Lease I LLC | Net Lease
Schedule of Equity Method Investments [Line Items]
Asset acquisition, ownership percentage	51.90%
Asset acquisition, related party ownership percentage	0.60%
Asset acquisition, related party promote fee percentage	50.00%

X

- Definition

Asset Acquisition, Ownership Percentage

+ References

No definition available.

+ Details

Name:	star_AssetAcquisitionOwnershipPercentage
Namespace Prefix:	star_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant

X

- Definition

Asset Acquisition, Partner Ownership Percentage

+ References

No definition available.

+ Details

Name:	star_AssetAcquisitionPartnerOwnershipPercentage
Namespace Prefix:	star_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant

X

- Definition

Asset Acquisition, Related Party Ownership Percentage

+ References

No definition available.

+ Details

Name:	star_AssetAcquisitionRelatedPartyOwnershipPercentage
Namespace Prefix:	star_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant

X

- Definition

Asset Acquisition, Related Party Promote Fee Percentage

+ References

No definition available.

+ Details

Name:	star_AssetAcquisitionRelatedPartyPromoteFeePercentage
Namespace Prefix:	star_
Data Type:	num:percentItemType
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_ScheduleOfEquityMethodInvestmentsLineItems
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

X

- Details

Name:	us-gaap_EquityMethodInvestmentNonconsolidatedInvesteeAxis=star_IStarNetLeaseILLCMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_RealEstatePropertiesAxis=star_NetLeaseAssetMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: