XML 67 R56.htm IDEA: XBRL DOCUMENT
v3.22.4

Summary of Significant Accounting Policies (Net Lease Sale) (Details) ft² in Millions, $ in Millions | 1 Months Ended | 3 Months Ended
--- | --- | ---
Mar. 31, 2022 USD ($) ft² lease item property | Jun. 30, 2021 lease | Mar. 31, 2022 USD ($) ft² property
Discontinued operations |  |  |
Number of ground leases entered into | lease |  | 2 |
Third Party Buyer - Net Lease Properties |  |  |
Discontinued operations |  |  |
Number of properties sold | property | 3 |  |
Consideration for sale of properties | $ 122.0 |  |
Number of ground leases entered into | lease | 3 |  |
Net Lease Venture |  |  |
Discontinued operations |  |  |
Equity interest in joint ventures | 51.90% |  | 51.90%
Discontinued Operations, Disposed of by Sale |  |  |
Discontinued operations |  |  |
Discontinued Operation, Gain (Loss) on Disposal, Statement of Income | Net income from discontinued operations |  |
Discontinued Operations, Disposed of by Sale | Net Lease Sale |  |  |
Discontinued operations |  |  |
Aggregate sales price | $ 3,070.0 |  | $ 3,070.0
Recognized gain on disposal | $ 663.7 |  |
Aggregate square footage of net lease assets | ft² | 18.3 |  | 18.3
Number of joint ventures with properties included in Net Lease Sale | item | 2 |  |
Mortgage indebtedness on lease assets | $ 702.0 |  | $ 702.0
Amount of net cash consideration retained after settlement of obligations | 1,200.0 |  | 1,200.0
Discontinued Operations, Disposed of by Sale | Two Net Lease Properties |  |  |
Discontinued operations |  |  |
Aggregate sales price | $ 33.9 |  | 33.9
Recognized gain on disposal |  |  | $ 23.9
Number of properties sold | property |  |  | 2

X
- Definition Amount of mortgage indebtedness on lease properties attributable to disposal group held for sale or disposed of. + References No definition available. + Details
Name: | star_DisposalGroupIncludingDiscontinuedOperationMortgageObligations
Namespace Prefix: | star_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Amount of net cash consideration available after settlement of obligations attributable to sale of disposal group held for sale. + References No definition available. + Details
Name: | star_DisposalGroupIncludingDiscontinuedOperationNetCashConsiderationAvailableAfterSettlementOfObligations
Namespace Prefix: | star_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition The aggregate square footage of held for sale net lease assets included in Net Lease Sale. + References No definition available. + Details
Name: | star_NetLeaseSaleAggregateSquareFootage
Namespace Prefix: | star_
Data Type: | dtr-types:areaItemType
Balance Type: | na
Period Type: | instant

X
- Definition Number of ground leases entered into during the period. + References No definition available. + Details
Name: | star_NumberOfGroundLeasesEnteredInto
Namespace Prefix: | star_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | duration

X
- Definition Number of joint ventures with properties included in Net Lease Sale. + References No definition available. + Details
Name: | star_NumberOfJointVenturesWithPropertiesIncludedInNetLeaseSale
Namespace Prefix: | star_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | duration

X
- Definition Number Of Real Estate Properties Sold + References No definition available. + Details
Name: | star_NumberOfRealEstatePropertiesSold
Namespace Prefix: | star_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | duration

X
- Definition Amount after tax of gain (loss) not previously recognized resulting from the disposal of a discontinued operation. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 205 -SubTopic 20 -Section 45 -Paragraph 3 -URI https://asc.fasb.org/extlink&oid=109222160&loc=d3e957-107759 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 205 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (b) -URI https://asc.fasb.org/extlink&oid=109222650&loc=d3e1361-107760 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 205 -SubTopic 20 -Section 45 -Paragraph 3B -URI https://asc.fasb.org/extlink&oid=109222160&loc=SL51721525-107759 Reference 4: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 205 -SubTopic 20 -Section 50 -Paragraph 5C -Subparagraph (b)(2) -URI https://asc.fasb.org/extlink&oid=109222650&loc=SL51721675-107760 + Details
Name: | us-gaap_DiscontinuedOperationGainLossOnDisposalOfDiscontinuedOperationNetOfTax
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Indicates line item in statement of income or comprehensive income that includes gain (loss) from disposal of discontinued operation. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 205 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (b) -URI https://asc.fasb.org/extlink&oid=109222650&loc=d3e1361-107760 + Details
Name: | us-gaap_DiscontinuedOperationGainLossOnDisposalStatementOfIncomeOrComprehensiveIncomeExtensibleEnumeration
Namespace Prefix: | us-gaap_
Data Type: | enum2:enumerationSetItemType
Balance Type: | na
Period Type: | duration

X
- Definition Amount of consideration received or receivable for the disposal of assets and liabilities, including discontinued operation. + References No definition available. + Details
Name: | us-gaap_DisposalGroupIncludingDiscontinuedOperationConsideration
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition The percentage of ownership of common stock or equity participation in the investee accounted for under the equity method of accounting. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 323 -SubTopic 10 -Section 50 -Paragraph 3 -Subparagraph (a)(1) -URI https://asc.fasb.org/extlink&oid=114001798&loc=d3e33918-111571 + Details
Name: | us-gaap_EquityMethodInvestmentOwnershipPercentage
Namespace Prefix: | us-gaap_
Data Type: | dtr-types: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_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition The cash inflow from the sale of property, plant and equipment (capital expenditures), software, and other intangible assets. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 12 -Subparagraph (c) -URI https://asc.fasb.org/extlink&oid=126954810&loc=d3e3179-108585 + Details
Name: | us-gaap_ProceedsFromSaleOfProductiveAssets
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Details
Name: | dei_LegalEntityAxis=star_ThirdPartyBuyerNetLeasePropertiesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis=star_IStarNetLeaseILLCMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_DisposalGroupClassificationAxis=us-gaap_DiscontinuedOperationsDisposedOfBySaleMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsAxis=star_NetLeasePortfolioMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsAxis=star_TwoNetLeasePropertiesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |