XML 96 R76.htm IDEA: XBRL DOCUMENT
v3.24.0.1

Significant Accounting Policies - Revenue Recognition (Narrative) (Details) - USD ($) $ in Thousands | 12 Months Ended |
--- | --- | ---
Dec. 31, 2023 | Dec. 31, 2022
Deferred Revenue Arrangement By Type Table [Line Items] |  |
Days past due for income recognition on debt and preferred equity investments to be suspended | 90 days |
Deferred revenue | $ 134,053 | $ 272,248
Unused and Unexpired Tickets |  |
Deferred Revenue Arrangement By Type Table [Line Items] |  |
Deferred revenue | $ 2,600 | $ 2,000

X
- Definition Deferred Revenue Arrangement By Type Table [Line Items] + References No definition available. + Details
Name: | slg_DeferredRevenueArrangementByTypeTableLineItems
Namespace Prefix: | slg_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition The number of days by which payments become past due, at which income recognition on financing receivables is generally suspended. + References No definition available. + Details
Name: | slg_FinancingReceivableNumberOfDaysPastDueForSuspendingIncomeRecognition
Namespace Prefix: | slg_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

X
- Definition Amount of obligation to transfer good or service to customer for which consideration has been received or is receivable. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 606 -SubTopic 10 -Name Accounting Standards Codification -Section 45 -Paragraph 1 -Publisher FASB -URI https://asc.fasb.org//1943274/2147479837/606-10-45-1 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Topic 606 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 8 -Subparagraph (a) -Publisher FASB -URI https://asc.fasb.org//1943274/2147479806/606-10-50-8 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Topic 606 -SubTopic 10 -Name Accounting Standards Codification -Section 45 -Paragraph 2 -Publisher FASB -URI https://asc.fasb.org//1943274/2147479837/606-10-45-2 + Details
Name: | us-gaap_ContractWithCustomerLiability
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Details
Name: | slg_RevenueFromContractWithCustomerLiabilityTypeAxisAxis=slg_UnusedAndUnexpiredTicketsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |