$SLG
SL Green Realty Corp Stock $slg

$slg Overview Financials Valuation SEC Filings Company Website

2024 Q3 Form 10-Q Financial Statement

#000104097124000025 Filed on July 31, 2024

Income Statement

Concept	2024 Q3	2024 Q2
Revenue	$229.7M	$222.8M
YoY Change	32.6%	0.79%
Cost Of Revenue		$109.8M
YoY Change		17.44%
Gross Profit		$113.0M
YoY Change		-11.41%
Gross Profit Margin		50.72%
Selling, General & Admin	$21.00M	$20.00M
YoY Change	-8.3%	-13.07%
% of Gross Profit		17.7%
Research & Development
YoY Change
% of Gross Profit
Depreciation & Amortization		$53.92M
YoY Change		-24.3%
% of Gross Profit		47.71%
Operating Expenses	$21.00M	$20.00M
YoY Change	-8.3%	-78.28%
Operating Profit		$93.02M
YoY Change		162.16%
Interest Expense	$51.34M	$49.50M
YoY Change	-2.9%	-160.28%
% of Operating Profit		53.22%
Other Income/Expense, Net		-$13.72M
YoY Change		-95.51%
Pretax Income		$1.959M
YoY Change		-100.52%
Income Tax	$1.100M	$900.0K
% Of Pretax Income		45.94%
Net Earnings	-$9.541M	$1.577M
YoY Change	-52.84%	-100.44%
Net Earnings / Revenue	-4.15%	0.71%
Basic Earnings Per Share	-$0.21	-$0.04
Diluted Earnings Per Share	-$0.21	-$0.04
COMMON SHARES
Basic Shares Outstanding	64.81M shares	64.81M shares
Diluted Shares Outstanding	64.39M shares	68.74M shares

Balance Sheet

Concept	2024 Q3	2024 Q2
SHORT-TERM ASSETS
Cash & Short-Term Investments	$204.7M	$216.1M
YoY Change	2.69%	12.56%
Cash & Equivalents	$188.2M	$199.5M
Short-Term Investments	$16.52M	$16.59M
Other Short-Term Assets
YoY Change
Inventory		$21.62M
Prepaid Expenses
Receivables		$315.9M
Other Receivables		$0.00
Total Short-Term Assets		$537.0M
YoY Change		3.63%
LONG-TERM ASSETS
Property, Plant & Equipment		$5.078B
YoY Change		2.23%
Goodwill
YoY Change
Intangibles
YoY Change
Long-Term Investments	$2.872B	$2.895B
YoY Change	-8.92%	-25.28%
Other Assets		$223.5M
YoY Change		-3.44%
Total Long-Term Assets		$9.012B
YoY Change		-5.37%
TOTAL ASSETS
Total Short-Term Assets		$537.0M
Total Long-Term Assets		$9.012B
Total Assets	$10.22B	$9.549B
YoY Change	5.42%	-4.91%
SHORT-TERM LIABILITIES
YoY Change
Accounts Payable		$121.1M
YoY Change		3.73%
Accrued Expenses		$839.5M
YoY Change		-7.34%
Deferred Revenue
YoY Change
Short-Term Debt		$0.00
YoY Change
Long-Term Debt Due
YoY Change
Total Short-Term Liabilities		$1.039B
YoY Change		-5.09%
LONG-TERM LIABILITIES
Long-Term Debt		$3.732B
YoY Change		-4.55%
Other Long-Term Liabilities		$587.9M
YoY Change		28.82%
Total Long-Term Liabilities		$4.320B
YoY Change		-1.07%
TOTAL LIABILITIES
Total Short-Term Liabilities		$1.039B
Total Long-Term Liabilities		$4.320B
Total Liabilities	$6.136B	$5.358B
YoY Change	18.71%	-7.33%
SHAREHOLDERS EQUITY
Retained Earnings	-$376.4M	-$279.8M
YoY Change	-703.2%	-306.44%
Common Stock	$663.0K	$660.0K
YoY Change	1.07%	0.61%
Preferred Stock
YoY Change
Treasury Stock (at cost)
YoY Change
Treasury Stock Shares
Shareholders Equity	$3.556B	$3.691B
YoY Change
Total Liabilities & Shareholders Equity	$10.22B	$9.549B
YoY Change	5.42%	-4.91%

Cashflow Statement

Concept	2024 Q3	2024 Q2
OPERATING ACTIVITIES
Net Income	-$9.541M	$1.577M
YoY Change	-52.84%	-100.44%
Depreciation, Depletion And Amortization		$53.92M
YoY Change		-24.3%
Cash From Operating Activities		$79.37M
YoY Change		28.76%
INVESTING ACTIVITIES
Capital Expenditures		$52.75M
YoY Change		-27.02%
Acquisitions
YoY Change
Other Investing Activities		$178.3M
YoY Change		78.67%
Cash From Investing Activities		$125.5M
YoY Change		356.4%
FINANCING ACTIVITIES
Cash Dividend Paid
YoY Change
Common Stock Issuance & Retirement, Net
YoY Change
Debt Paid & Issued, Net
YoY Change
Cash From Financing Activities		-207.6M
YoY Change		53.36%
NET CHANGE
Cash From Operating Activities		79.37M
Cash From Investing Activities		125.5M
Cash From Financing Activities		-207.6M
Net Change In Cash		-2.685M
YoY Change		-94.19%
FREE CASH FLOW
Cash From Operating Activities		$79.37M
Capital Expenditures		$52.75M
Free Cash Flow		$26.63M
YoY Change		-350.51%

Facts In Submission

Frame	Concept Type	Concept / XBRL Key	Value	Unit
CY2022Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	384054000	usd
CY2024Q2	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	315811000	usd
CY2024Q2	us-gaap	Assets Of Disposal Group Including Discontinued Operation AssetsOfDisposalGroupIncludingDiscontinuedOperation	21615000	usd
CY2023Q4	us-gaap	Restricted Cash And Cash Equivalents RestrictedCashAndCashEquivalents	113696000	usd
CY2024Q2	us-gaap	Marketable Securities MarketableSecurities	16593000	usd
CY2023Q4	us-gaap	Marketable Securities MarketableSecurities	9591000	usd
CY2024Q2	us-gaap	Accounts And Notes Receivable Net AccountsAndNotesReceivableNet	41202000	usd
CY2023Q4	us-gaap	Accounts And Notes Receivable Net AccountsAndNotesReceivableNet	33270000	usd
CY2024Q2	us-gaap	Other Receivables OtherReceivables	8127000	usd
CY2023Q4	us-gaap	Other Receivables OtherReceivables	12168000	usd
CY2024Q2	us-gaap	Deferred Rent Receivables Net DeferredRentReceivablesNet	266596000	usd
CY2023Q4	us-gaap	Deferred Rent Receivables Net DeferredRentReceivablesNet	264653000	usd
CY2024Q2	slg	Discount Of Structured Finance Investments DiscountOfStructuredFinanceInvestments	1618000	usd
CY2023Q4	slg	Discount Of Structured Finance Investments DiscountOfStructuredFinanceInvestments	1630000	usd
CY2024Q2	us-gaap	Financing Receivable Allowance For Credit Loss Excluding Accrued Interest FinancingReceivableAllowanceForCreditLossExcludingAccruedInterest	13520000	usd
CY2023Q4	us-gaap	Financing Receivable Allowance For Credit Loss Excluding Accrued Interest FinancingReceivableAllowanceForCreditLossExcludingAccruedInterest	13520000	usd
CY2024Q2	us-gaap	Mortgage Loans On Real Estate Commercial And Consumer Net MortgageLoansOnRealEstateCommercialAndConsumerNet	290487000	usd
CY2023Q4	us-gaap	Mortgage Loans On Real Estate Commercial And Consumer Net MortgageLoansOnRealEstateCommercialAndConsumerNet	346745000	usd
CY2024Q2	us-gaap	Equity Method Investments EquityMethodInvestments	2895399000	usd
CY2023Q4	us-gaap	Equity Method Investments EquityMethodInvestments	2983313000	usd
CY2024Q2	us-gaap	Deferred Costs Current And Noncurrent DeferredCostsCurrentAndNoncurrent	107163000	usd
CY2023Q4	us-gaap	Deferred Costs Current And Noncurrent DeferredCostsCurrentAndNoncurrent	111463000	usd
CY2024Q2	us-gaap	Operating Lease Right Of Use Asset OperatingLeaseRightOfUseAsset	875878000	usd
CY2023Q4	us-gaap	Operating Lease Right Of Use Asset OperatingLeaseRightOfUseAsset	885929000	usd
CY2023Q4	us-gaap	Other Assets OtherAssets	413670000	usd
CY2024Q2	us-gaap	Assets Assets	9548652000	usd
CY2023Q4	us-gaap	Assets Assets	9531181000	usd
CY2024Q2	us-gaap	Secured Debt SecuredDebt	1644494000	usd
CY2024Q2	us-gaap	Line Of Credit LineOfCredit	535462000	usd
CY2023Q4	us-gaap	Unsecured Debt UnsecuredDebt	99795000	usd
CY2024Q2	us-gaap	Interest Payable Current And Noncurrent InterestPayableCurrentAndNoncurrent	20083000	usd
CY2023Q4	us-gaap	Interest Payable Current And Noncurrent InterestPayableCurrentAndNoncurrent	17930000	usd
CY2024Q2	us-gaap	Other Liabilities OtherLiabilities	423816000	usd
CY2023Q4	us-gaap	Other Liabilities OtherLiabilities	471401000	usd
CY2024Q2	us-gaap	Accounts Payable And Accrued Liabilities Current And Noncurrent AccountsPayableAndAccruedLiabilitiesCurrentAndNoncurrent	121050000	usd
CY2024Q2	us-gaap	Contract With Customer Liability ContractWithCustomerLiability	153660000	usd
CY2023Q4	us-gaap	Contract With Customer Liability ContractWithCustomerLiability	134053000	usd
CY2024Q2	us-gaap	Finance Lease Liability FinanceLeaseLiability	106187000	usd
CY2024Q2	us-gaap	Operating Lease Liability OperatingLeaseLiability	819439000	usd
CY2024Q2	us-gaap	Dividends Payable Current And Noncurrent DividendsPayableCurrentAndNoncurrent	20088000	usd
CY2024Q2	us-gaap	Security Deposit Liability SecurityDepositLiability	58002000	usd
CY2023Q4	us-gaap	Security Deposit Liability SecurityDepositLiability	49906000	usd
CY2024Q2	us-gaap	Liabilities Of Disposal Group Including Discontinued Operation LiabilitiesOfDisposalGroupIncludingDiscontinuedOperation	10424000	usd
CY2023Q4	us-gaap	Liabilities Of Disposal Group Including Discontinued Operation LiabilitiesOfDisposalGroupIncludingDiscontinuedOperation	0	usd
CY2023Q4	us-gaap	Junior Subordinated Debenture Owed To Unconsolidated Subsidiary Trust JuniorSubordinatedDebentureOwedToUnconsolidatedSubsidiaryTrust	100000000	usd
CY2024Q2	us-gaap	Liabilities Liabilities	5358337000	usd
CY2023Q4	us-gaap	Liabilities Liabilities	5270704000	usd
CY2024Q2	us-gaap	Commitments And Contingencies CommitmentsAndContingencies		usd
CY2023Q4	us-gaap	Commitments And Contingencies CommitmentsAndContingencies		usd
CY2023Q4	us-gaap	Redeemable Noncontrolling Interest Equity Common Carrying Amount RedeemableNoncontrollingInterestEquityCommonCarryingAmount	238051000	usd
CY2023Q4	us-gaap	Redeemable Noncontrolling Interest Equity Preferred Carrying Amount RedeemableNoncontrollingInterestEquityPreferredCarryingAmount	166501000	usd
CY2024Q2	us-gaap	Preferred Stock Value PreferredStockValue	221932000	usd
CY2023Q4	us-gaap	Preferred Stock Value PreferredStockValue	221932000	usd
CY2024Q2	us-gaap	Common Stock Par Or Stated Value Per Share CommonStockParOrStatedValuePerShare	0.01
CY2023Q4	us-gaap	Common Stock Par Or Stated Value Per Share CommonStockParOrStatedValuePerShare	0.01
CY2023Q4	us-gaap	Common Stock Shares Authorized CommonStockSharesAuthorized	160000000	shares
CY2024Q2	us-gaap	Common Stock Shares Authorized CommonStockSharesAuthorized	160000000	shares
CY2024Q2	us-gaap	Common Stock Shares Outstanding CommonStockSharesOutstanding	65874000	shares
CY2024Q2	us-gaap	Common Stock Shares Issued CommonStockSharesIssued	65874000	shares
CY2023Q4	us-gaap	Common Stock Shares Issued CommonStockSharesIssued	65786000	shares
CY2023Q4	us-gaap	Common Stock Shares Outstanding CommonStockSharesOutstanding	65786000	shares
CY2024Q2	us-gaap	Treasury Stock Common Shares TreasuryStockCommonShares	1060000	shares
CY2023Q4	us-gaap	Treasury Stock Common Shares TreasuryStockCommonShares	1060000	shares
CY2024Q2	us-gaap	Common Stock Value CommonStockValue	660000	usd
CY2023Q4	us-gaap	Common Stock Value CommonStockValue	660000	usd
CY2024Q2	us-gaap	Additional Paid In Capital AdditionalPaidInCapital	3836751000	usd
CY2023Q4	us-gaap	Additional Paid In Capital AdditionalPaidInCapital	3826452000	usd
CY2024Q2	us-gaap	Treasury Stock Common Value TreasuryStockCommonValue	128655000	usd
CY2023Q4	us-gaap	Treasury Stock Common Value TreasuryStockCommonValue	128655000	usd
CY2024Q2	us-gaap	Accumulated Other Comprehensive Income Loss Net Of Tax AccumulatedOtherComprehensiveIncomeLossNetOfTax	40371000	usd
CY2023Q4	us-gaap	Accumulated Other Comprehensive Income Loss Net Of Tax AccumulatedOtherComprehensiveIncomeLossNetOfTax	17477000	usd
CY2024Q2	us-gaap	Retained Earnings Accumulated Deficit RetainedEarningsAccumulatedDeficit	-279763000	usd
CY2023Q4	us-gaap	Retained Earnings Accumulated Deficit RetainedEarningsAccumulatedDeficit	-151551000	usd
CY2024Q2	us-gaap	Stockholders Equity StockholdersEquity	3691296000	usd
CY2023Q4	us-gaap	Stockholders Equity StockholdersEquity	3786315000	usd
CY2024Q2	us-gaap	Nonredeemable Noncontrolling Interest NonredeemableNoncontrollingInterest	66465000	usd
CY2023Q4	us-gaap	Nonredeemable Noncontrolling Interest NonredeemableNoncontrollingInterest	69610000	usd
CY2024Q2	us-gaap	Stockholders Equity Including Portion Attributable To Noncontrolling Interest StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest	3757761000	usd
CY2023Q4	us-gaap	Stockholders Equity Including Portion Attributable To Noncontrolling Interest StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest	3855925000	usd
CY2024Q2	us-gaap	Liabilities And Stockholders Equity LiabilitiesAndStockholdersEquity	9548652000	usd
CY2023Q4	us-gaap	Liabilities And Stockholders Equity LiabilitiesAndStockholdersEquity	9531181000	usd
CY2024Q2	us-gaap	Operating Lease Lease Income OperatingLeaseLeaseIncome	150632000	usd
CY2023Q2	us-gaap	Operating Lease Lease Income OperatingLeaseLeaseIncome	185945000	usd
CY2024Q2	slg	Segment Operator Revenue SegmentOperatorRevenue	32602000	usd
CY2023Q2	slg	Segment Operator Revenue SegmentOperatorRevenue	28180000	usd
CY2024Q2	us-gaap	Investment Income Interest And Dividend InvestmentIncomeInterestAndDividend	6191000	usd
CY2023Q2	us-gaap	Investment Income Interest And Dividend InvestmentIncomeInterestAndDividend	9103000	usd
CY2024Q2	us-gaap	Other Income OtherIncome	33395000	usd
CY2023Q2	us-gaap	Other Income OtherIncome	22808000	usd
	us-gaap	Other Income OtherIncome	46766000	usd
	us-gaap	Other Income OtherIncome	44702000	usd
CY2024Q2	us-gaap	Revenues Revenues	222820000	usd
CY2023Q2	us-gaap	Revenues Revenues	246036000	usd
	us-gaap	Revenues Revenues	410702000	usd
	us-gaap	Revenues Revenues	491800000	usd
CY2024Q2	us-gaap	Operating Costs And Expenses OperatingCostsAndExpenses	46333000	usd
CY2023Q2	us-gaap	Operating Costs And Expenses OperatingCostsAndExpenses	46957000	usd
	us-gaap	Operating Costs And Expenses OperatingCostsAndExpenses	89941000	usd
	us-gaap	Operating Costs And Expenses OperatingCostsAndExpenses	99021000	usd
CY2024Q2	us-gaap	Real Estate Tax Expense RealEstateTaxExpense	32058000	usd
CY2023Q2	us-gaap	Real Estate Tax Expense RealEstateTaxExpense	39885000	usd
	us-gaap	Real Estate Tax Expense RealEstateTaxExpense	63664000	usd
	us-gaap	Real Estate Tax Expense RealEstateTaxExpense	81268000	usd
CY2024Q2	us-gaap	Operating Lease Cost OperatingLeaseCost	6368000	usd
CY2023Q2	us-gaap	Operating Lease Cost OperatingLeaseCost	6655000	usd
	us-gaap	Operating Lease Cost OperatingLeaseCost	12773000	usd
	us-gaap	Operating Lease Cost OperatingLeaseCost	12956000	usd
CY2024Q2	slg	Segment Operator Expense SegmentOperatorExpense	23188000	usd
CY2023Q2	slg	Segment Operator Expense SegmentOperatorExpense	22836000	usd
	slg	Segment Operator Expense SegmentOperatorExpense	45046000	usd
	slg	Segment Operator Expense SegmentOperatorExpense	43524000	usd
CY2024Q2	us-gaap	Interest Expense Other InterestExpenseOther	35803000	usd
CY2023Q2	us-gaap	Interest Expense Other InterestExpenseOther	40621000	usd
	us-gaap	Interest Expense Other InterestExpenseOther	66976000	usd
	us-gaap	Interest Expense Other InterestExpenseOther	82274000	usd
CY2024Q2	us-gaap	Amortization Of Financing Costs AmortizationOfFinancingCosts	1677000	usd
CY2023Q2	us-gaap	Amortization Of Financing Costs AmortizationOfFinancingCosts	2154000	usd
	us-gaap	Amortization Of Financing Costs AmortizationOfFinancingCosts	3216000	usd
	us-gaap	Amortization Of Financing Costs AmortizationOfFinancingCosts	4175000	usd
CY2024Q2	slg	Segment Operator Tax Expense Benefit SegmentOperatorTaxExpenseBenefit	1855000	usd
CY2023Q2	slg	Segment Operator Tax Expense Benefit SegmentOperatorTaxExpenseBenefit	1879000	usd
	slg	Segment Operator Tax Expense Benefit SegmentOperatorTaxExpenseBenefit	560000	usd
	slg	Segment Operator Tax Expense Benefit SegmentOperatorTaxExpenseBenefit	3146000	usd
CY2024Q2	us-gaap	Depreciation And Amortization DepreciationAndAmortization	52247000	usd
CY2023Q2	us-gaap	Depreciation And Amortization DepreciationAndAmortization	69335000	usd
	us-gaap	Depreciation And Amortization DepreciationAndAmortization	100831000	usd
	us-gaap	Depreciation And Amortization DepreciationAndAmortization	148117000	usd
CY2024Q2	us-gaap	Financing Receivable Excluding Accrued Interest Credit Loss Expense Reversal FinancingReceivableExcludingAccruedInterestCreditLossExpenseReversal	0	usd
CY2023Q2	us-gaap	Financing Receivable Excluding Accrued Interest Credit Loss Expense Reversal FinancingReceivableExcludingAccruedInterestCreditLossExpenseReversal	0	usd
	us-gaap	Financing Receivable Excluding Accrued Interest Credit Loss Expense Reversal FinancingReceivableExcludingAccruedInterestCreditLossExpenseReversal	0	usd
	us-gaap	Financing Receivable Excluding Accrued Interest Credit Loss Expense Reversal FinancingReceivableExcludingAccruedInterestCreditLossExpenseReversal	6890000	usd
CY2024Q2	us-gaap	Other Cost And Expense Operating OtherCostAndExpenseOperating	76000	usd
CY2023Q2	us-gaap	Other Cost And Expense Operating OtherCostAndExpenseOperating	33000	usd
	us-gaap	Other Cost And Expense Operating OtherCostAndExpenseOperating	92000	usd
	us-gaap	Other Cost And Expense Operating OtherCostAndExpenseOperating	917000	usd
CY2024Q2	us-gaap	Selling General And Administrative Expense SellingGeneralAndAdministrativeExpense	20032000	usd
CY2023Q2	us-gaap	Selling General And Administrative Expense SellingGeneralAndAdministrativeExpense	22974000	usd
	us-gaap	Selling General And Administrative Expense SellingGeneralAndAdministrativeExpense	41345000	usd
	us-gaap	Selling General And Administrative Expense SellingGeneralAndAdministrativeExpense	46259000	usd
CY2024Q2	slg	Total Costs And Expenses Including Nonoperating Income Expense TotalCostsAndExpensesIncludingNonoperatingIncomeExpense	219637000	usd
CY2023Q2	slg	Total Costs And Expenses Including Nonoperating Income Expense TotalCostsAndExpensesIncludingNonoperatingIncomeExpense	253329000	usd
	slg	Total Costs And Expenses Including Nonoperating Income Expense TotalCostsAndExpensesIncludingNonoperatingIncomeExpense	424444000	usd
	slg	Total Costs And Expenses Including Nonoperating Income Expense TotalCostsAndExpensesIncludingNonoperatingIncomeExpense	528547000	usd
CY2024Q2	us-gaap	Income Loss From Equity Method Investments IncomeLossFromEquityMethodInvestments	4325000	usd
CY2023Q2	us-gaap	Income Loss From Equity Method Investments IncomeLossFromEquityMethodInvestments	-21932000	usd
	us-gaap	Income Loss From Equity Method Investments IncomeLossFromEquityMethodInvestments	115485000	usd
	us-gaap	Income Loss From Equity Method Investments IncomeLossFromEquityMethodInvestments	-29344000	usd
CY2024Q2	us-gaap	Equity Method Investment Realized Gain Loss On Disposal EquityMethodInvestmentRealizedGainLossOnDisposal	-8129000	usd
CY2023Q2	us-gaap	Equity Method Investment Realized Gain Loss On Disposal EquityMethodInvestmentRealizedGainLossOnDisposal	0	usd
	us-gaap	Equity Method Investment Realized Gain Loss On Disposal EquityMethodInvestmentRealizedGainLossOnDisposal	18635000	usd
	us-gaap	Equity Method Investment Realized Gain Loss On Disposal EquityMethodInvestmentRealizedGainLossOnDisposal	-79000	usd
CY2024Q2	slg	Gain Loss On Purchase Price Fair Value Adjustment Gross GainLossOnPurchasePriceFairValueAdjustmentGross	1265000	usd
CY2023Q2	slg	Gain Loss On Purchase Price Fair Value Adjustment Gross GainLossOnPurchasePriceFairValueAdjustmentGross	-17409000	usd
	slg	Gain Loss On Purchase Price Fair Value Adjustment Gross GainLossOnPurchasePriceFairValueAdjustmentGross	-49227000	usd
	slg	Gain Loss On Purchase Price Fair Value Adjustment Gross GainLossOnPurchasePriceFairValueAdjustmentGross	-17170000	usd
CY2024Q2	us-gaap	Gains Losses On Sales Of Investment Real Estate GainsLossesOnSalesOfInvestmentRealEstate	-2741000	usd
CY2023Q2	us-gaap	Gains Losses On Sales Of Investment Real Estate GainsLossesOnSalesOfInvestmentRealEstate	-26678000	usd
	us-gaap	Gains Losses On Sales Of Investment Real Estate GainsLossesOnSalesOfInvestmentRealEstate	-2741000	usd
	us-gaap	Gains Losses On Sales Of Investment Real Estate GainsLossesOnSalesOfInvestmentRealEstate	-28329000	usd
CY2024Q2	slg	Depreciable Real Estate Reserves Effecton Earnings DepreciableRealEstateReservesEffectonEarnings	-13721000	usd
CY2023Q2	slg	Depreciable Real Estate Reserves Effecton Earnings DepreciableRealEstateReservesEffectonEarnings	-305916000	usd
	slg	Depreciable Real Estate Reserves Effecton Earnings DepreciableRealEstateReservesEffectonEarnings	-65839000	usd
	slg	Depreciable Real Estate Reserves Effecton Earnings DepreciableRealEstateReservesEffectonEarnings	-305916000	usd
CY2024Q2	us-gaap	Gains Losses On Extinguishment Of Debt GainsLossesOnExtinguishmentOfDebt	17777000	usd
CY2023Q2	us-gaap	Gains Losses On Extinguishment Of Debt GainsLossesOnExtinguishmentOfDebt	0	usd
	us-gaap	Gains Losses On Extinguishment Of Debt GainsLossesOnExtinguishmentOfDebt	17777000	usd
	us-gaap	Gains Losses On Extinguishment Of Debt GainsLossesOnExtinguishmentOfDebt	0	usd
CY2024Q2	us-gaap	Profit Loss ProfitLoss	1959000	usd
CY2023Q2	us-gaap	Profit Loss ProfitLoss	-379228000	usd
	us-gaap	Profit Loss ProfitLoss	20348000	usd
	us-gaap	Profit Loss ProfitLoss	-417585000	usd
CY2023Q2	us-gaap	Noncontrolling Interest In Net Income Loss Operating Partnerships Redeemable NoncontrollingInterestInNetIncomeLossOperatingPartnershipsRedeemable	-23582000	usd
	us-gaap	Noncontrolling Interest In Net Income Loss Operating Partnerships Redeemable NoncontrollingInterestInNetIncomeLossOperatingPartnershipsRedeemable	748000	usd
	us-gaap	Noncontrolling Interest In Net Income Loss Operating Partnerships Redeemable NoncontrollingInterestInNetIncomeLossOperatingPartnershipsRedeemable	-25919000	usd
CY2024Q2	slg	Net Income Loss Attributable To Other Partnerships NetIncomeLossAttributableToOtherPartnerships	-1871000	usd
CY2023Q2	slg	Net Income Loss Attributable To Other Partnerships NetIncomeLossAttributableToOtherPartnerships	-1040000	usd
	slg	Net Income Loss Attributable To Other Partnerships NetIncomeLossAttributableToOtherPartnerships	-3165000	usd
	slg	Net Income Loss Attributable To Other Partnerships NetIncomeLossAttributableToOtherPartnerships	-2665000	usd
CY2024Q2	us-gaap	Noncontrolling Interest In Net Income Loss Preferred Unit Holders Redeemable NoncontrollingInterestInNetIncomeLossPreferredUnitHoldersRedeemable	2406000	usd
CY2023Q2	us-gaap	Noncontrolling Interest In Net Income Loss Preferred Unit Holders Redeemable NoncontrollingInterestInNetIncomeLossPreferredUnitHoldersRedeemable	1851000	usd
	us-gaap	Noncontrolling Interest In Net Income Loss Preferred Unit Holders Redeemable NoncontrollingInterestInNetIncomeLossPreferredUnitHoldersRedeemable	4309000	usd
	us-gaap	Noncontrolling Interest In Net Income Loss Preferred Unit Holders Redeemable NoncontrollingInterestInNetIncomeLossPreferredUnitHoldersRedeemable	3449000	usd
CY2024Q2	us-gaap	Net Income Loss NetIncomeLoss	1577000	usd
CY2023Q2	us-gaap	Net Income Loss NetIncomeLoss	-356457000	usd
	us-gaap	Net Income Loss NetIncomeLoss	18456000	usd
	us-gaap	Net Income Loss NetIncomeLoss	-392450000	usd
CY2024Q2	us-gaap	Dividends Preferred Stock DividendsPreferredStock	3737000	usd
CY2023Q2	us-gaap	Dividends Preferred Stock DividendsPreferredStock	3737000	usd
	us-gaap	Dividends Preferred Stock DividendsPreferredStock	7475000	usd
	us-gaap	Dividends Preferred Stock DividendsPreferredStock	7475000	usd
CY2024Q2	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	-2160000	usd
CY2023Q2	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	-360194000	usd
	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	10981000	usd
	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	-399925000	usd
CY2024Q2	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	-0.04
CY2023Q2	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	-5.63
	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.16
	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	-6.25
CY2024Q2	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	-0.04
CY2023Q2	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	-5.63
	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.16
	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	-6.25
CY2024Q2	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	64353000	shares
CY2023Q2	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	64102000	shares
	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	64340000	shares
	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	64091000	shares
CY2024Q2	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	68740000	shares
CY2023Q2	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	68341000	shares
	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	70137000	shares
	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	68263000	shares
CY2024Q2	us-gaap	Profit Loss ProfitLoss	1959000	usd
CY2023Q2	us-gaap	Profit Loss ProfitLoss	-379228000	usd
	us-gaap	Profit Loss ProfitLoss	20348000	usd
	us-gaap	Profit Loss ProfitLoss	-417585000	usd
CY2024Q2	us-gaap	Other Comprehensive Income Loss Cash Flow Hedge Gain Loss After Reclassification And Tax OtherComprehensiveIncomeLossCashFlowHedgeGainLossAfterReclassificationAndTax	-98000	usd
CY2023Q2	us-gaap	Other Comprehensive Income Loss Cash Flow Hedge Gain Loss After Reclassification And Tax OtherComprehensiveIncomeLossCashFlowHedgeGainLossAfterReclassificationAndTax	41322000	usd
	us-gaap	Other Comprehensive Income Loss Cash Flow Hedge Gain Loss After Reclassification And Tax OtherComprehensiveIncomeLossCashFlowHedgeGainLossAfterReclassificationAndTax	23116000	usd
	us-gaap	Other Comprehensive Income Loss Cash Flow Hedge Gain Loss After Reclassification And Tax OtherComprehensiveIncomeLossCashFlowHedgeGainLossAfterReclassificationAndTax	10263000	usd
CY2024Q2	us-gaap	Other Comprehensive Income Loss Available For Sale Securities Adjustment Net Of Tax OtherComprehensiveIncomeLossAvailableForSaleSecuritiesAdjustmentNetOfTax	316000	usd
CY2023Q2	us-gaap	Other Comprehensive Income Loss Available For Sale Securities Adjustment Net Of Tax OtherComprehensiveIncomeLossAvailableForSaleSecuritiesAdjustmentNetOfTax	-476000	usd
	us-gaap	Other Comprehensive Income Loss Available For Sale Securities Adjustment Net Of Tax OtherComprehensiveIncomeLossAvailableForSaleSecuritiesAdjustmentNetOfTax	1398000	usd
	us-gaap	Other Comprehensive Income Loss Available For Sale Securities Adjustment Net Of Tax OtherComprehensiveIncomeLossAvailableForSaleSecuritiesAdjustmentNetOfTax	-1444000	usd
CY2024Q2	us-gaap	Other Comprehensive Income Loss Net Of Tax OtherComprehensiveIncomeLossNetOfTax	218000	usd
CY2023Q2	us-gaap	Other Comprehensive Income Loss Net Of Tax OtherComprehensiveIncomeLossNetOfTax	40846000	usd
	us-gaap	Other Comprehensive Income Loss Net Of Tax OtherComprehensiveIncomeLossNetOfTax	24514000	usd
	us-gaap	Other Comprehensive Income Loss Net Of Tax OtherComprehensiveIncomeLossNetOfTax	8819000	usd
CY2024Q2	us-gaap	Comprehensive Income Net Of Tax Including Portion Attributable To Noncontrolling Interest ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest	2177000	usd
CY2023Q2	us-gaap	Comprehensive Income Net Of Tax Including Portion Attributable To Noncontrolling Interest ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest	-338382000	usd
	us-gaap	Comprehensive Income Net Of Tax Including Portion Attributable To Noncontrolling Interest ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest	44862000	usd
	us-gaap	Comprehensive Income Net Of Tax Including Portion Attributable To Noncontrolling Interest ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest	-408766000	usd
CY2024Q2	us-gaap	Net Income Loss Attributable To Noncontrolling Interest NetIncomeLossAttributableToNoncontrollingInterest	382000	usd
CY2023Q2	us-gaap	Net Income Loss Attributable To Noncontrolling Interest NetIncomeLossAttributableToNoncontrollingInterest	-22771000	usd
	us-gaap	Net Income Loss Attributable To Noncontrolling Interest NetIncomeLossAttributableToNoncontrollingInterest	1892000	usd
	us-gaap	Net Income Loss Attributable To Noncontrolling Interest NetIncomeLossAttributableToNoncontrollingInterest	-25135000	usd
CY2024Q2	us-gaap	Other Comprehensive Income Loss Net Of Tax Portion Attributable To Noncontrolling Interest OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToNoncontrollingInterest	-2000	usd
CY2023Q2	us-gaap	Other Comprehensive Income Loss Net Of Tax Portion Attributable To Noncontrolling Interest OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToNoncontrollingInterest	2505000	usd
	us-gaap	Other Comprehensive Income Loss Net Of Tax Portion Attributable To Noncontrolling Interest OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToNoncontrollingInterest	1620000	usd
	us-gaap	Other Comprehensive Income Loss Net Of Tax Portion Attributable To Noncontrolling Interest OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToNoncontrollingInterest	654000	usd
CY2024Q2	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	1797000	usd
CY2023Q2	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	-318116000	usd
	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	41350000	usd
	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	-384285000	usd
CY2024Q1	us-gaap	Stockholders Equity Including Portion Attributable To Noncontrolling Interest StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest	3803648000	usd
CY2024Q2	slg	Profit Loss Less Minority Interest In Net Income Loss Operating Partnerships ProfitLossLessMinorityInterestInNetIncomeLossOperatingPartnerships	-294000	usd
CY2024Q2	us-gaap	Other Comprehensive Income Loss Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent	220000	usd
CY2024Q2	us-gaap	Dividends Preferred Stock DividendsPreferredStock	3737000	usd
CY2024Q2	us-gaap	Stock Issued During Period Value Dividend Reinvestment Plan StockIssuedDuringPeriodValueDividendReinvestmentPlan	43000	usd
CY2024Q2	slg	Reallocationof Noncontrolling Interest In Operating Partnership Increase Decrease ReallocationofNoncontrollingInterestInOperatingPartnershipIncreaseDecrease	364000	usd
CY2024Q2	slg	Deferred Compensation Plan And Stock Award Net DeferredCompensationPlanAndStockAwardNet	5578000	usd
CY2024Q2	slg	Consolidation Of Joint Venture Interest ConsolidationOfJointVentureInterest	1823000	usd
CY2024Q2	us-gaap	Minority Interest Decrease From Distributions To Noncontrolling Interest Holders MinorityInterestDecreaseFromDistributionsToNoncontrollingInterestHolders	1524000	usd
CY2024Q2	us-gaap	Common Stock Dividends Per Share Declared CommonStockDividendsPerShareDeclared	0.750
CY2024Q2	us-gaap	Dividends Common Stock DividendsCommonStock	48360000	usd
CY2024Q2	us-gaap	Stockholders Equity Including Portion Attributable To Noncontrolling Interest StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest	3757761000	usd
CY2023Q1	us-gaap	Stockholders Equity Including Portion Attributable To Noncontrolling Interest StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest	4529174000	usd
CY2023Q2	slg	Profit Loss Less Minority Interest In Net Income Loss Operating Partnerships ProfitLossLessMinorityInterestInNetIncomeLossOperatingPartnerships	-357497000	usd
CY2023Q2	us-gaap	Other Comprehensive Income Loss Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent	38341000	usd
CY2023Q2	us-gaap	Dividends Preferred Stock DividendsPreferredStock	3737000	usd
CY2023Q2	us-gaap	Stock Issued During Period Value Dividend Reinvestment Plan StockIssuedDuringPeriodValueDividendReinvestmentPlan	158000	usd
CY2023Q2	slg	Reallocationof Noncontrolling Interest In Operating Partnership Increase Decrease ReallocationofNoncontrollingInterestInOperatingPartnershipIncreaseDecrease	-1051000	usd
CY2023Q2	slg	Deferred Compensation Plan And Stock Award Net DeferredCompensationPlanAndStockAwardNet	7445000	usd
CY2023Q2	slg	Consolidation Of Joint Venture Interest ConsolidationOfJointVentureInterest	-112000	usd
CY2023Q2	us-gaap	Minority Interest Decrease From Distributions To Noncontrolling Interest Holders MinorityInterestDecreaseFromDistributionsToNoncontrollingInterestHolders	627000	usd
CY2023Q2	us-gaap	Common Stock Dividends Per Share Declared CommonStockDividendsPerShareDeclared	0.812
CY2023Q2	us-gaap	Dividends Common Stock DividendsCommonStock	52261000	usd
CY2023Q2	us-gaap	Stockholders Equity Including Portion Attributable To Noncontrolling Interest StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest	4159833000	usd
CY2023Q4	us-gaap	Stockholders Equity Including Portion Attributable To Noncontrolling Interest StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest	3855925000	usd
	slg	Profit Loss Less Minority Interest In Net Income Loss Operating Partnerships ProfitLossLessMinorityInterestInNetIncomeLossOperatingPartnerships	15291000	usd
	us-gaap	Minority Interest Decrease From Redemptions MinorityInterestDecreaseFromRedemptions	5674000	usd
	us-gaap	Other Comprehensive Income Loss Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent	22894000	usd
	us-gaap	Dividends Preferred Stock DividendsPreferredStock	7475000	usd
	us-gaap	Stock Issued During Period Value Dividend Reinvestment Plan StockIssuedDuringPeriodValueDividendReinvestmentPlan	120000	usd
	slg	Reallocationof Noncontrolling Interest In Operating Partnership Increase Decrease ReallocationofNoncontrollingInterestInOperatingPartnershipIncreaseDecrease	-42477000	usd
	slg	Deferred Compensation Plan And Stock Award Net DeferredCompensationPlanAndStockAwardNet	10179000	usd
	us-gaap	Noncontrolling Interest Increase From Subsidiary Equity Issuance NoncontrollingInterestIncreaseFromSubsidiaryEquityIssuance	1823000	usd
	slg	Consolidation Of Joint Venture Interest ConsolidationOfJointVentureInterest	6678000	usd
	us-gaap	Minority Interest Decrease From Distributions To Noncontrolling Interest Holders MinorityInterestDecreaseFromDistributionsToNoncontrollingInterestHolders	2807000	usd
	us-gaap	Common Stock Dividends Per Share Declared CommonStockDividendsPerShareDeclared	1.500
	us-gaap	Dividends Common Stock DividendsCommonStock	96716000	usd
CY2024Q2	us-gaap	Stockholders Equity Including Portion Attributable To Noncontrolling Interest StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest	3757761000	usd
CY2022Q4	us-gaap	Stockholders Equity Including Portion Attributable To Noncontrolling Interest StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest	4646922000	usd
	slg	Profit Loss Less Minority Interest In Net Income Loss Operating Partnerships ProfitLossLessMinorityInterestInNetIncomeLossOperatingPartnerships	-395115000	usd
	us-gaap	Other Comprehensive Income Loss Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent	8165000	usd
	us-gaap	Dividends Preferred Stock DividendsPreferredStock	7475000	usd
	us-gaap	Stock Issued During Period Value Dividend Reinvestment Plan StockIssuedDuringPeriodValueDividendReinvestmentPlan	342000	usd
	slg	Reallocationof Noncontrolling Interest In Operating Partnership Increase Decrease ReallocationofNoncontrollingInterestInOperatingPartnershipIncreaseDecrease	-11198000	usd
	slg	Deferred Compensation Plan And Stock Award Net DeferredCompensationPlanAndStockAwardNet	15004000	usd
	slg	Consolidation Of Joint Venture Interest ConsolidationOfJointVentureInterest	8448000	usd
	us-gaap	Minority Interest Decrease From Distributions To Noncontrolling Interest Holders MinorityInterestDecreaseFromDistributionsToNoncontrollingInterestHolders	763000	usd
	us-gaap	Common Stock Dividends Per Share Declared CommonStockDividendsPerShareDeclared	1.625
	us-gaap	Dividends Common Stock DividendsCommonStock	104497000	usd
CY2023Q2	us-gaap	Stockholders Equity Including Portion Attributable To Noncontrolling Interest StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest	4159833000	usd
	us-gaap	Profit Loss ProfitLoss	20348000	usd
	us-gaap	Profit Loss ProfitLoss	-417585000	usd
	us-gaap	Depreciation Depletion And Amortization DepreciationDepletionAndAmortization	104047000	usd
	us-gaap	Depreciation Depletion And Amortization DepreciationDepletionAndAmortization	152292000	usd
	us-gaap	Income Loss From Equity Method Investments IncomeLossFromEquityMethodInvestments	115485000	usd
	us-gaap	Income Loss From Equity Method Investments IncomeLossFromEquityMethodInvestments	-29344000	usd
	us-gaap	Equity Method Investment Dividends Or Distributions EquityMethodInvestmentDividendsOrDistributions	237000	usd
	us-gaap	Equity Method Investment Dividends Or Distributions EquityMethodInvestmentDividendsOrDistributions	409000	usd
	us-gaap	Equity Method Investment Realized Gain Loss On Disposal EquityMethodInvestmentRealizedGainLossOnDisposal	18635000	usd
	us-gaap	Equity Method Investment Realized Gain Loss On Disposal EquityMethodInvestmentRealizedGainLossOnDisposal	-79000	usd
	slg	Purchase Price Fair Value Adjustment Gain Loss PurchasePriceFairValueAdjustmentGainLoss	-49227000	usd
	slg	Purchase Price Fair Value Adjustment Gain Loss PurchasePriceFairValueAdjustmentGainLoss	-17170000	usd
	slg	Depreciable Real Estate Reserves Cash Flow Effect DepreciableRealEstateReservesCashFlowEffect	-65839000	usd
	slg	Depreciable Real Estate Reserves Cash Flow Effect DepreciableRealEstateReservesCashFlowEffect	-305916000	usd
	us-gaap	Gains Losses On Sales Of Investment Real Estate GainsLossesOnSalesOfInvestmentRealEstate	-2741000	usd
	us-gaap	Gains Losses On Sales Of Investment Real Estate GainsLossesOnSalesOfInvestmentRealEstate	-28329000	usd
	us-gaap	Financing Receivable Excluding Accrued Interest Credit Loss Expense Reversal FinancingReceivableExcludingAccruedInterestCreditLossExpenseReversal	0	usd
	us-gaap	Financing Receivable Excluding Accrued Interest Credit Loss Expense Reversal FinancingReceivableExcludingAccruedInterestCreditLossExpenseReversal	6890000	usd
	us-gaap	Gains Losses On Extinguishment Of Debt GainsLossesOnExtinguishmentOfDebt	17777000	usd
	us-gaap	Gains Losses On Extinguishment Of Debt GainsLossesOnExtinguishmentOfDebt	0	usd
	us-gaap	Straight Line Rent StraightLineRent	2009000	usd
	us-gaap	Straight Line Rent StraightLineRent	14357000	usd
	slg	Non Cash Lease Expense NonCashLeaseExpense	10052000	usd
	slg	Non Cash Lease Expense NonCashLeaseExpense	10550000	usd
	us-gaap	Other Noncash Income Expense OtherNoncashIncomeExpense	-24194000	usd
	us-gaap	Other Noncash Income Expense OtherNoncashIncomeExpense	2523000	usd
	us-gaap	Increase Decrease In Accounts Receivable IncreaseDecreaseInAccountsReceivable	8312000	usd
	us-gaap	Increase Decrease In Accounts Receivable IncreaseDecreaseInAccountsReceivable	3805000	usd
	us-gaap	Increase Decrease In Due From Related Parties Current IncreaseDecreaseInDueFromRelatedPartiesCurrent	-4959000	usd
	us-gaap	Increase Decrease In Due From Related Parties Current IncreaseDecreaseInDueFromRelatedPartiesCurrent	893000	usd
	us-gaap	Increase Decrease In Deferred Leasing Fees IncreaseDecreaseInDeferredLeasingFees	7669000	usd
	us-gaap	Increase Decrease In Deferred Leasing Fees IncreaseDecreaseInDeferredLeasingFees	5891000	usd
	us-gaap	Increase Decrease In Other Operating Assets IncreaseDecreaseInOtherOperatingAssets	-11631000	usd
	us-gaap	Increase Decrease In Other Operating Assets IncreaseDecreaseInOtherOperatingAssets	-750000	usd
	slg	Increase Decrease In Accrued Liabilities And Other IncreaseDecreaseInAccruedLiabilitiesAndOther	-60375000	usd
	slg	Increase Decrease In Accrued Liabilities And Other IncreaseDecreaseInAccruedLiabilitiesAndOther	2697000	usd
	us-gaap	Increase Decrease In Deferred Liabilities IncreaseDecreaseInDeferredLiabilities	-64000	usd
	us-gaap	Increase Decrease In Deferred Liabilities IncreaseDecreaseInDeferredLiabilities	-585000	usd
	us-gaap	Increase Decrease In Operating Lease Liability IncreaseDecreaseInOperatingLeaseLiability	-8252000	usd
	us-gaap	Increase Decrease In Operating Lease Liability IncreaseDecreaseInOperatingLeaseLiability	-4795000	usd
	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	54697000	usd
	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	103992000	usd
	slg	Payments To Acquire Land Buildings And Improvements PaymentsToAcquireLandBuildingsAndImprovements	108063000	usd
	slg	Payments To Acquire Land Buildings And Improvements PaymentsToAcquireLandBuildingsAndImprovements	134190000	usd
	slg	Payments For Proceeds From Acquisition Deposits And Deferred Purchase Price PaymentsForProceedsFromAcquisitionDepositsAndDeferredPurchasePrice	12817000	usd
	slg	Payments For Proceeds From Acquisition Deposits And Deferred Purchase Price PaymentsForProceedsFromAcquisitionDepositsAndDeferredPurchasePrice	0	usd
	us-gaap	Payments To Acquire Equity Method Investments PaymentsToAcquireEquityMethodInvestments	325282000	usd
	us-gaap	Payments To Acquire Equity Method Investments PaymentsToAcquireEquityMethodInvestments	46977000	usd
	us-gaap	Proceeds From Equity Method Investment Dividends Or Distributions Return Of Capital ProceedsFromEquityMethodInvestmentDividendsOrDistributionsReturnOfCapital	66735000	usd
	us-gaap	Proceeds From Equity Method Investment Dividends Or Distributions Return Of Capital ProceedsFromEquityMethodInvestmentDividendsOrDistributionsReturnOfCapital	72823000	usd
	us-gaap	Proceeds From Real Estate And Real Estate Joint Ventures ProceedsFromRealEstateAndRealEstateJointVentures	457142000	usd
	us-gaap	Proceeds From Real Estate And Real Estate Joint Ventures ProceedsFromRealEstateAndRealEstateJointVentures	97563000	usd
	us-gaap	Payments To Acquire Marketable Securities PaymentsToAcquireMarketableSecurities	5604000	usd
	us-gaap	Payments To Acquire Marketable Securities PaymentsToAcquireMarketableSecurities	0	usd
	slg	Payments For Proceeds From Other Investments PaymentsForProceedsFromOtherInvestments	5530000	usd
	slg	Payments For Proceeds From Other Investments PaymentsForProceedsFromOtherInvestments	17779000	usd
	slg	Origination Of Debt And Preferred Equity Investments OriginationOfDebtAndPreferredEquityInvestments	8275000	usd
	slg	Origination Of Debt And Preferred Equity Investments OriginationOfDebtAndPreferredEquityInvestments	10308000	usd
	slg	Repayments Or Redemption Of Debt And Preferred Equity Investments RepaymentsOrRedemptionOfDebtAndPreferredEquityInvestments	63496000	usd
	slg	Repayments Or Redemption Of Debt And Preferred Equity Investments RepaymentsOrRedemptionOfDebtAndPreferredEquityInvestments	0	usd
	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	121802000	usd
	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	-38868000	usd
	us-gaap	Proceeds From Issuance Of Secured Debt ProceedsFromIssuanceOfSecuredDebt	493000	usd
	us-gaap	Proceeds From Issuance Of Secured Debt ProceedsFromIssuanceOfSecuredDebt	0	usd
	us-gaap	Repayments Of Secured Debt RepaymentsOfSecuredDebt	34987000	usd
	us-gaap	Repayments Of Secured Debt RepaymentsOfSecuredDebt	2899000	usd
	us-gaap	Proceeds From Issuance Of Unsecured Debt ProceedsFromIssuanceOfUnsecuredDebt	700000000	usd
	us-gaap	Proceeds From Issuance Of Unsecured Debt ProceedsFromIssuanceOfUnsecuredDebt	223000000	usd
	us-gaap	Repayments Of Unsecured Debt RepaymentsOfUnsecuredDebt	720000000	usd
	us-gaap	Repayments Of Unsecured Debt RepaymentsOfUnsecuredDebt	218000000	usd
	us-gaap	Proceeds From Stock Options Exercised ProceedsFromStockOptionsExercised	120000	usd
	us-gaap	Proceeds From Stock Options Exercised ProceedsFromStockOptionsExercised	342000	usd
	us-gaap	Payments For Repurchase Of Redeemable Preferred Stock PaymentsForRepurchaseOfRedeemablePreferredStock	0	usd
	us-gaap	Payments For Repurchase Of Redeemable Preferred Stock PaymentsForRepurchaseOfRedeemablePreferredStock	11700000	usd
	us-gaap	Payments For Repurchase Of Other Equity PaymentsForRepurchaseOfOtherEquity	24915000	usd
	us-gaap	Payments For Repurchase Of Other Equity PaymentsForRepurchaseOfOtherEquity	5250000	usd
	slg	Distributions To Noncontrolling Interests Other Partnerships DistributionsToNoncontrollingInterestsOtherPartnerships	2807000	usd
	slg	Distributions To Noncontrolling Interests Other Partnerships DistributionsToNoncontrollingInterestsOtherPartnerships	763000	usd
	slg	Proceeds From Noncontrolling Interests In Other Partnerships ProceedsFromNoncontrollingInterestsInOtherPartnerships	1823000	usd
	slg	Proceeds From Noncontrolling Interests In Other Partnerships ProceedsFromNoncontrollingInterestsInOtherPartnerships	314000	usd
	slg	Distribution To Noncontrolling Interest Operating Partnership DistributionToNoncontrollingInterestOperatingPartnership	7126000	usd
	slg	Distribution To Noncontrolling Interest Operating Partnership DistributionToNoncontrollingInterestOperatingPartnership	7550000	usd
	us-gaap	Payments Of Dividends PaymentsOfDividends	108462000	usd
	us-gaap	Payments Of Dividends PaymentsOfDividends	114983000	usd
	slg	Proceeds From Payments Of Financing Costs ProceedsFromPaymentsOfFinancingCosts	346000	usd
	slg	Proceeds From Payments Of Financing Costs ProceedsFromPaymentsOfFinancingCosts	630000	usd
	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	-196207000	usd
	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	-138119000	usd
	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Period Increase Decrease Including Exchange Rate Effect CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect	-19708000	usd
	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Period Increase Decrease Including Exchange Rate Effect CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect	-72995000	usd
CY2023Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	335519000	usd
CY2023Q2	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	311059000	usd
	slg	Consolidation Of Real Estate Investment ConsolidationOfRealEstateInvestment	10639000	usd
	slg	Consolidation Of Real Estate Investment ConsolidationOfRealEstateInvestment	0	usd
	slg	Deconsolidation Real Estate Investments DeconsolidationRealEstateInvestments	0	usd
	slg	Deconsolidation Real Estate Investments DeconsolidationRealEstateInvestments	101351000	usd
	slg	Consolidation Of A Subsidiary ConsolidationOfASubsidiary	6678000	usd
	slg	Consolidation Of A Subsidiary ConsolidationOfASubsidiary	0	usd
	slg	Consolidation Of Mortgage Loan Payable ConsolidationOfMortgageLoanPayable	205000000	usd
	slg	Consolidation Of Mortgage Loan Payable ConsolidationOfMortgageLoanPayable	0	usd
	slg	Acquisition Of Subsidiary Interest From Noncontrolling Interest AcquisitionOfSubsidiaryInterestFromNoncontrollingInterest	5674000	usd
	slg	Acquisition Of Subsidiary Interest From Noncontrolling Interest AcquisitionOfSubsidiaryInterestFromNoncontrollingInterest	0	usd
	slg	Contribution To Consolidated Joint Venture Interest ContributionToConsolidatedJointVentureInterest	0	usd
	slg	Contribution To Consolidated Joint Venture Interest ContributionToConsolidatedJointVentureInterest	8134000	usd
	slg	Extinguishment Of Debt In Connection With Property Dispositions ExtinguishmentOfDebtInConnectionWithPropertyDispositions	18000000	usd
	slg	Extinguishment Of Debt In Connection With Property Dispositions ExtinguishmentOfDebtInConnectionWithPropertyDispositions	0	usd
	slg	Debt And Preferred Equity Reserves DebtAndPreferredEquityReserves	1133000	usd
	slg	Debt And Preferred Equity Reserves DebtAndPreferredEquityReserves	0	usd
	slg	Removalof Fully Depreciated Real Estate Assets RemovalofFullyDepreciatedRealEstateAssets	4585000	usd
	slg	Removalof Fully Depreciated Real Estate Assets RemovalofFullyDepreciatedRealEstateAssets	7747000	usd
	slg	Share Repurchases Payable ShareRepurchasesPayable	4932000	usd
	slg	Share Repurchases Payable ShareRepurchasesPayable	0	usd
CY2024Q2	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	199501000	usd
CY2023Q2	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	191979000	usd
CY2024Q2	us-gaap	Restricted Cash And Cash Equivalents RestrictedCashAndCashEquivalents	116310000	usd
CY2023Q2	us-gaap	Restricted Cash And Cash Equivalents RestrictedCashAndCashEquivalents	119080000	usd
CY2024Q2	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	315811000	usd
CY2023Q2	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	311059000	usd
CY2023Q4	us-gaap	Land Land	1092671000	usd
CY2023Q4	us-gaap	Investment Building And Building Improvements InvestmentBuildingAndBuildingImprovements	3655624000	usd
CY2023Q4	slg	Building Leasehold Improvements Gross BuildingLeaseholdImprovementsGross	1354569000	usd
CY2023Q4	us-gaap	Real Estate Investment Property Accumulated Depreciation RealEstateInvestmentPropertyAccumulatedDepreciation	1968004000	usd
CY2023Q4	us-gaap	Assets Of Disposal Group Including Discontinued Operation AssetsOfDisposalGroupIncludingDiscontinuedOperation	0	usd
CY2023Q4	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	221823000	usd
CY2023Q4	us-gaap	Restricted Cash And Cash Equivalents RestrictedCashAndCashEquivalents	113696000	usd
CY2023Q4	us-gaap	Marketable Securities MarketableSecurities	9591000	usd
CY2023Q4	us-gaap	Accounts And Notes Receivable Net AccountsAndNotesReceivableNet	33270000	usd
CY2023Q4	us-gaap	Other Receivables OtherReceivables	12168000	usd
CY2023Q4	us-gaap	Deferred Rent Receivables Net DeferredRentReceivablesNet	264653000	usd
CY2023Q4	us-gaap	Mortgage Loans On Real Estate Commercial And Consumer Net MortgageLoansOnRealEstateCommercialAndConsumerNet	346745000	usd
CY2023Q4	us-gaap	Equity Method Investments EquityMethodInvestments	2983313000	usd
CY2023Q4	us-gaap	Deferred Costs Current And Noncurrent DeferredCostsCurrentAndNoncurrent	111463000	usd
CY2023Q4	us-gaap	Operating Lease Right Of Use Asset OperatingLeaseRightOfUseAsset	885929000	usd
CY2023Q4	us-gaap	Other Assets OtherAssets	413670000	usd
CY2023Q4	us-gaap	Secured Debt SecuredDebt	1491319000	usd
CY2023Q4	us-gaap	Line Of Credit LineOfCredit	554752000	usd
CY2023Q4	us-gaap	Senior Notes SeniorNotes	1244881000	usd
CY2023Q4	us-gaap	Unsecured Debt UnsecuredDebt	99795000	usd
CY2023Q4	us-gaap	Interest Payable Current And Noncurrent InterestPayableCurrentAndNoncurrent	17930000	usd
CY2023Q4	us-gaap	Other Liabilities OtherLiabilities	471401000	usd
CY2023Q4	us-gaap	Accounts Payable And Accrued Liabilities Current And Noncurrent AccountsPayableAndAccruedLiabilitiesCurrentAndNoncurrent	153164000	usd
CY2023Q4	us-gaap	Contract With Customer Liability ContractWithCustomerLiability	134053000	usd
CY2023Q4	us-gaap	Finance Lease Liability FinanceLeaseLiability	105531000	usd
CY2023Q4	us-gaap	Operating Lease Liability OperatingLeaseLiability	827692000	usd
CY2023Q4	us-gaap	Dividends Payable Current And Noncurrent DividendsPayableCurrentAndNoncurrent	20280000	usd
CY2023Q4	us-gaap	Security Deposit Liability SecurityDepositLiability	49906000	usd
CY2023Q4	us-gaap	Liabilities Of Disposal Group Including Discontinued Operation LiabilitiesOfDisposalGroupIncludingDiscontinuedOperation	0	usd
CY2023Q4	us-gaap	Junior Subordinated Debenture Owed To Unconsolidated Subsidiary Trust JuniorSubordinatedDebentureOwedToUnconsolidatedSubsidiaryTrust	100000000	usd
CY2023Q4	us-gaap	Redeemable Noncontrolling Interest Equity Common Carrying Amount RedeemableNoncontrollingInterestEquityCommonCarryingAmount	238051000	usd
CY2023Q4	us-gaap	Redeemable Noncontrolling Interest Equity Preferred Carrying Amount RedeemableNoncontrollingInterestEquityPreferredCarryingAmount	166501000	usd
CY2023Q4	us-gaap	Preferred Stock Value PreferredStockValue	221932000	usd
CY2023Q4	us-gaap	Accumulated Other Comprehensive Income Loss Net Of Tax AccumulatedOtherComprehensiveIncomeLossNetOfTax	17477000	usd
CY2024Q2	slg	Mortgage Loanson Real Estate Commercialand Consumer Net Including Debt Investments Other MortgageLoansonRealEstateCommercialandConsumerNetIncludingDebtInvestmentsOther	290500000	usd
CY2024Q2	slg	Debt Investments Other DebtInvestmentsOther	7500000	usd
	slg	Number Of Shares On Redemption Of One Unit Of Partnership Interest NumberOfSharesOnRedemptionOfOneUnitOfPartnershipInterest	1	shares
CY2024Q2	slg	Rental Revenue Increase Decrease Acquired Lease Amortization RentalRevenueIncreaseDecreaseAcquiredLeaseAmortization	900000	usd
	slg	Rental Revenue Increase Decrease Acquired Lease Amortization RentalRevenueIncreaseDecreaseAcquiredLeaseAmortization	900000	usd
CY2023Q2	slg	Rental Revenue Increase Decrease Acquired Lease Amortization RentalRevenueIncreaseDecreaseAcquiredLeaseAmortization	6200000	usd
	slg	Rental Revenue Increase Decrease Acquired Lease Amortization RentalRevenueIncreaseDecreaseAcquiredLeaseAmortization	14500000	usd
CY2024Q2	us-gaap	Finite Lived Intangible Assets Gross FiniteLivedIntangibleAssetsGross	273010000	usd
CY2023Q4	us-gaap	Finite Lived Intangible Assets Gross FiniteLivedIntangibleAssetsGross	189680000	usd
CY2024Q2	us-gaap	Finite Lived Intangible Assets Accumulated Amortization FiniteLivedIntangibleAssetsAccumulatedAmortization	189425000	usd
CY2023Q4	us-gaap	Finite Lived Intangible Assets Accumulated Amortization FiniteLivedIntangibleAssetsAccumulatedAmortization	184902000	usd
CY2024Q2	us-gaap	Finite Lived Intangible Assets Net FiniteLivedIntangibleAssetsNet	83585000	usd
CY2023Q4	us-gaap	Finite Lived Intangible Assets Net FiniteLivedIntangibleAssetsNet	4778000	usd
CY2024Q2	slg	Finite Lived Intangible Liabilities Gross FiniteLivedIntangibleLiabilitiesGross	226034000	usd
CY2023Q4	slg	Finite Lived Intangible Liabilities Gross FiniteLivedIntangibleLiabilitiesGross	205394000	usd
CY2024Q2	slg	Finite Lived Intangible Liabilities Accumulated Amortization FiniteLivedIntangibleLiabilitiesAccumulatedAmortization	202819000	usd
CY2023Q4	slg	Finite Lived Intangible Liabilities Accumulated Amortization FiniteLivedIntangibleLiabilitiesAccumulatedAmortization	202089000	usd
CY2024Q2	slg	Finite Lived Intangible Liabilities Net FiniteLivedIntangibleLiabilitiesNet	23215000	usd
CY2023Q4	slg	Finite Lived Intangible Liabilities Net FiniteLivedIntangibleLiabilitiesNet	3305000	usd
CY2024Q2	us-gaap	Marketable Securities MarketableSecurities	16593000	usd
CY2023Q4	us-gaap	Marketable Securities MarketableSecurities	9591000	usd
	us-gaap	Proceeds From Sale Of Available For Sale Securities Debt ProceedsFromSaleOfAvailableForSaleSecuritiesDebt	0	usd
CY2023Q2	us-gaap	Proceeds From Sale Of Available For Sale Securities Debt ProceedsFromSaleOfAvailableForSaleSecuritiesDebt	0	usd
	us-gaap	Proceeds From Sale Of Available For Sale Securities Debt ProceedsFromSaleOfAvailableForSaleSecuritiesDebt	0	usd
CY2024Q2	us-gaap	Proceeds From Sale Of Available For Sale Securities Debt ProceedsFromSaleOfAvailableForSaleSecuritiesDebt	0	usd
CY2024Q2	us-gaap	Equity Securities Fv Ni Current And Noncurrent EquitySecuritiesFvNiCurrentAndNoncurrent	0	usd
CY2023Q4	us-gaap	Equity Securities Fv Ni Current And Noncurrent EquitySecuritiesFvNiCurrentAndNoncurrent	0	usd
	slg	Financing Receivable Number Of Days Past Due For Suspending Income Recognition FinancingReceivableNumberOfDaysPastDueForSuspendingIncomeRecognition	P90D
CY2024Q2	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	900000	usd
	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	1600000	usd
CY2023Q2	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	2000000	usd
	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	2700000	usd
CY2024Q2	slg	Segment Operator Tax Expense Benefit SegmentOperatorTaxExpenseBenefit	1900000	usd
	slg	Segment Operator Tax Expense Benefit SegmentOperatorTaxExpenseBenefit	600000	usd
CY2023Q2	slg	Segment Operator Tax Expense Benefit SegmentOperatorTaxExpenseBenefit	1900000	usd
	slg	Segment Operator Tax Expense Benefit SegmentOperatorTaxExpenseBenefit	3100000	usd
	us-gaap	Use Of Estimates UseOfEstimates	<div style="margin-bottom:6pt;text-align:justify"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:700;line-height:120%">Use of Estimates</span></div><div style="margin-bottom:6pt;text-align:justify;text-indent:24.75pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">The preparation of financial statements in conformity with accounting principles generally accepted in the United States requires management to make estimates and assumptions that affect the amounts reported in the financial statements and accompanying notes. Actual results could differ from those estimates.</span></div>
	us-gaap	Concentration Risk Credit Risk ConcentrationRiskCreditRisk	<div style="margin-bottom:6pt;text-align:justify"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:700;line-height:120%">Concentrations of Credit Risk</span></div><div style="margin-bottom:6pt;text-align:justify;text-indent:24.75pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">Financial instruments that potentially subject us to concentrations of credit risk consist primarily of cash investments, debt and preferred equity investments and accounts receivable. We place our cash investments with high quality financial institutions. The collateral securing our debt and preferred equity investments is located in New York City. See Note 5, "Debt and Preferred Equity Investments." </span></div>We perform initial and ongoing evaluations of the credit quality of our tenants and require most tenants to provide security deposits or letters of credit. Though these security deposits and letters of credit are insufficient to meet the total value of a tenant's lease obligation, they are a measure of good faith and a potential source of funds to offset the economic costs associated with lost revenue from that tenant and the costs associated with re-tenanting a space.
	us-gaap	Prior Period Reclassification Adjustment Description PriorPeriodReclassificationAdjustmentDescription	<div style="margin-bottom:6pt;text-align:justify"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:700;line-height:120%">Reclassification</span></div><div style="margin-bottom:6pt;text-align:justify;text-indent:24.75pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">Certain prior year balances have been reclassified to conform to our current year presentation.</span></div><div style="margin-bottom:6pt;text-align:justify;text-indent:24.75pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">Beginning in the second quarter of 2024, we reclassified amounts recorded for certain right-of-use assets classified as operating leases from a gross presentation above accumulated depreciation to a net presentation below accumulated depreciation in our consolidated balance sheets. This includes reclassifying the related amortization that was previously included in the accumulated depreciation. We believe this presentation enhances the Company's financial statements. </span></div>As of December 31, 2023, SUMMIT met the criteria of a reportable operating segment pursuant to the guidance in ASC 280. Accordingly, we reclassified SUMMIT Operator revenue, SUMMIT Operator expenses, and SUMMIT Operator tax expense to separate financial statement line items in our consolidated statements of operations. These items were previously presented on a net basis in Other income. Additionally, the depreciation and amortization of SUMMIT assets are included in Depreciation and amortization in our consolidated statements of operations. Prior period balances have been reclassified to conform to the current period presentation.
	slg	Number Of Real Estate Properties Acquired From Third Party NumberOfRealEstatePropertiesAcquiredFromThirdParty	0	property
CY2023Q4	us-gaap	Mortgage Loans On Real Estate MortgageLoansOnRealEstate	346745000	usd
CY2022Q4	us-gaap	Mortgage Loans On Real Estate MortgageLoansOnRealEstate	623280000	usd
	us-gaap	Mortgage Loans On Real Estate Amortization Of Premium MortgageLoansOnRealEstateAmortizationOfPremium	64629000	usd
CY2023	us-gaap	Mortgage Loans On Real Estate Amortization Of Premium MortgageLoansOnRealEstateAmortizationOfPremium	349947000	usd
	slg	Sec Schedule1229 Real Estate Companies Investment In Mortgage Loans On Real Estate Loan Loss Reserve Period Increase Decrease SECSchedule1229RealEstateCompaniesInvestmentInMortgageLoansOnRealEstateLoanLossReservePeriodIncreaseDecrease	0	usd
CY2023	slg	Sec Schedule1229 Real Estate Companies Investment In Mortgage Loans On Real Estate Loan Loss Reserve Period Increase Decrease SECSchedule1229RealEstateCompaniesInvestmentInMortgageLoansOnRealEstateLoanLossReservePeriodIncreaseDecrease	-6890000	usd
CY2024Q2	us-gaap	Mortgage Loans On Real Estate MortgageLoansOnRealEstate	290487000	usd
CY2023Q4	us-gaap	Mortgage Loans On Real Estate MortgageLoansOnRealEstate	346745000	usd
CY2024Q2	slg	Number Of Investments Nonperforming NumberOfInvestmentsNonperforming	2	investment
CY2024Q2	us-gaap	Mortgage Loans On Real Estate Commercial And Consumer Net MortgageLoansOnRealEstateCommercialAndConsumerNet	290487000	usd
CY2024Q2	slg	Mortgage Loanson Real Estate Senior Financing MortgageLoansonRealEstateSeniorFinancing	1053690000	usd
CY2024Q2	slg	Number Of Investments Nonperforming NumberOfInvestmentsNonperforming	2	investment
CY2023Q4	us-gaap	Financing Receivable Allowance For Credit Loss Excluding Accrued Interest FinancingReceivableAllowanceForCreditLossExcludingAccruedInterest	13520000	usd
CY2022Q4	us-gaap	Financing Receivable Allowance For Credit Loss Excluding Accrued Interest FinancingReceivableAllowanceForCreditLossExcludingAccruedInterest	6630000	usd
	us-gaap	Financing Receivable Excluding Accrued Interest Credit Loss Expense Reversal FinancingReceivableExcludingAccruedInterestCreditLossExpenseReversal	0	usd
CY2023	us-gaap	Financing Receivable Excluding Accrued Interest Credit Loss Expense Reversal FinancingReceivableExcludingAccruedInterestCreditLossExpenseReversal	6890000	usd
CY2024Q2	us-gaap	Financing Receivable Allowance For Credit Loss Excluding Accrued Interest FinancingReceivableAllowanceForCreditLossExcludingAccruedInterest	13520000	usd
CY2023Q4	us-gaap	Financing Receivable Allowance For Credit Loss Excluding Accrued Interest FinancingReceivableAllowanceForCreditLossExcludingAccruedInterest	13520000	usd
CY2024Q2	slg	Financing Receivable Nonaccrual No Allowance Number FinancingReceivableNonaccrualNoAllowanceNumber	1	loan
CY2024Q2	slg	Number Of Investments Nonperforming NumberOfInvestmentsNonperforming	2	investment
CY2023Q4	slg	Number Of Investments Nonperforming NumberOfInvestmentsNonperforming	2	investment
CY2024Q2	us-gaap	Financing Receivable Excluding Accrued Interest Before Allowance For Credit Loss FinancingReceivableExcludingAccruedInterestBeforeAllowanceForCreditLoss	290487000	usd
CY2023Q4	us-gaap	Financing Receivable Excluding Accrued Interest Before Allowance For Credit Loss FinancingReceivableExcludingAccruedInterestBeforeAllowanceForCreditLoss	346745000	usd
CY2024Q2	slg	Number Of Investments Nonperforming NumberOfInvestmentsNonperforming	2	investment
CY2024Q2	us-gaap	Financing Receivable Excluding Accrued Interest Year One Originated Current Fiscal Year FinancingReceivableExcludingAccruedInterestYearOneOriginatedCurrentFiscalYear	0	usd
CY2024Q2	us-gaap	Financing Receivable Excluding Accrued Interest Year Two Originated Fiscal Year Before Current Fiscal Year FinancingReceivableExcludingAccruedInterestYearTwoOriginatedFiscalYearBeforeCurrentFiscalYear	0	usd
CY2024Q2	us-gaap	Financing Receivable Excluding Accrued Interest Year Three Originated Two Years Before Current Fiscal Year FinancingReceivableExcludingAccruedInterestYearThreeOriginatedTwoYearsBeforeCurrentFiscalYear	0	usd
CY2024Q2	us-gaap	Financing Receivable Excluding Accrued Interest Year Four Originated Three Years Before Current Fiscal Year FinancingReceivableExcludingAccruedInterestYearFourOriginatedThreeYearsBeforeCurrentFiscalYear	290487000	usd
CY2024Q2	us-gaap	Financing Receivable Excluding Accrued Interest Before Allowance For Credit Loss FinancingReceivableExcludingAccruedInterestBeforeAllowanceForCreditLoss	290487000	usd
CY2024Q2	slg	Number Of Investments Nonperforming NumberOfInvestmentsNonperforming	2	investment
	slg	Financing Receivable Portfolio Segments Number FinancingReceivablePortfolioSegmentsNumber	1	segment
CY2023	slg	Financing Receivable Portfolio Segments Number FinancingReceivablePortfolioSegmentsNumber	1	segment
	srt	Mortgage Loans On Real Estate Interest Rate MortgageLoansOnRealEstateInterestRate	0.0638
CY2024Q2	slg	Variable Interest Entity Not Primary Beneficiary Investment VariableInterestEntityNotPrimaryBeneficiaryInvestment	257500000	usd
CY2023Q4	slg	Variable Interest Entity Not Primary Beneficiary Investment VariableInterestEntityNotPrimaryBeneficiaryInvestment	437900000	usd
CY2024Q2	us-gaap	Employee Related Liabilities Current And Noncurrent EmployeeRelatedLiabilitiesCurrentAndNoncurrent	7800000	usd
CY2023Q4	us-gaap	Equity Method Investments EquityMethodInvestments	2983313000	usd
CY2024Q2	us-gaap	Equity Method Investment Difference Between Carrying Amount And Underlying Equity EquityMethodInvestmentDifferenceBetweenCarryingAmountAndUnderlyingEquity	539500000	usd
CY2024Q2	us-gaap	Deferred Costs Leasing Gross DeferredCostsLeasingGross	404949000	usd
CY2023Q4	us-gaap	Deferred Costs Leasing Gross DeferredCostsLeasingGross	399224000	usd
CY2024Q2	slg	Accumulated Amortization Of Deferred Costs AccumulatedAmortizationOfDeferredCosts	297786000	usd
CY2023Q4	slg	Accumulated Amortization Of Deferred Costs AccumulatedAmortizationOfDeferredCosts	287761000	usd
CY2024Q2	us-gaap	Deferred Costs Current And Noncurrent DeferredCostsCurrentAndNoncurrent	107163000	usd
CY2023Q4	us-gaap	Deferred Costs Current And Noncurrent DeferredCostsCurrentAndNoncurrent	111463000	usd
CY2024Q2	slg	Secured Debt Bearing Fixed Interest Amount SecuredDebtBearingFixedInterestAmount	1589399000	usd
CY2023Q4	slg	Secured Debt Bearing Fixed Interest Amount SecuredDebtBearingFixedInterestAmount	1387386000	usd
CY2024Q2	slg	Secured Debt Bearing Variable Interest Amount SecuredDebtBearingVariableInterestAmount	60493000	usd
CY2023Q4	slg	Secured Debt Bearing Variable Interest Amount SecuredDebtBearingVariableInterestAmount	110000000	usd
CY2024Q2	slg	Secured Debt Gross SecuredDebtGross	1649892000	usd
CY2023Q4	slg	Secured Debt Gross SecuredDebtGross	1497386000	usd
CY2024Q2	slg	Secured Debt Deferred Finance Costs Net SecuredDebtDeferredFinanceCostsNet	5398000	usd
CY2023Q4	slg	Secured Debt Deferred Finance Costs Net SecuredDebtDeferredFinanceCostsNet	6067000	usd
CY2024Q2	us-gaap	Secured Debt SecuredDebt	1644494000	usd
CY2023Q4	us-gaap	Secured Debt SecuredDebt	1491319000	usd
CY2024Q2	us-gaap	Collateral Already Posted Aggregate Fair Value CollateralAlreadyPostedAggregateFairValue	1800000000	usd
CY2023Q4	us-gaap	Collateral Already Posted Aggregate Fair Value CollateralAlreadyPostedAggregateFairValue	1900000000	usd
CY2024Q2	us-gaap	Long Term Debt Maturities Repayments Of Principal Remainder Of Fiscal Year LongTermDebtMaturitiesRepaymentsOfPrincipalRemainderOfFiscalYear	474251000	usd
CY2024Q2	us-gaap	Long Term Debt Maturities Repayments Of Principal In Next Twelve Months LongTermDebtMaturitiesRepaymentsOfPrincipalInNextTwelveMonths	530493000	usd
CY2024Q2	us-gaap	Long Term Debt Maturities Repayments Of Principal In Year Two LongTermDebtMaturitiesRepaymentsOfPrincipalInYearTwo	190148000	usd
CY2024Q2	us-gaap	Long Term Debt Maturities Repayments Of Principal In Year Three LongTermDebtMaturitiesRepaymentsOfPrincipalInYearThree	2140000000	usd
CY2024Q2	us-gaap	Long Term Debt Maturities Repayments Of Principal In Year Four LongTermDebtMaturitiesRepaymentsOfPrincipalInYearFour	205000000	usd
CY2024Q2	slg	Long Term Debt Maturity After Year Four LongTermDebtMaturityAfterYearFour	100000000	usd
CY2024Q2	slg	Long Term Debt Maturities Repayments Of Principal LongTermDebtMaturitiesRepaymentsOfPrincipal	3639892000	usd
CY2024Q2	us-gaap	Interest Expense InterestExpense	49503000	usd
CY2023Q2	us-gaap	Interest Expense InterestExpense	65932000	usd
	us-gaap	Interest Expense InterestExpense	98371000	usd
	us-gaap	Interest Expense InterestExpense	130774000	usd
CY2024Q2	slg	Finance Lease Interest Expense Before Capitalized Interest FinanceLeaseInterestExpenseBeforeCapitalizedInterest	1124000	usd
CY2023Q2	slg	Finance Lease Interest Expense Before Capitalized Interest FinanceLeaseInterestExpenseBeforeCapitalizedInterest	1110000	usd
	slg	Finance Lease Interest Expense Before Capitalized Interest FinanceLeaseInterestExpenseBeforeCapitalizedInterest	2244000	usd
	slg	Finance Lease Interest Expense Before Capitalized Interest FinanceLeaseInterestExpenseBeforeCapitalizedInterest	2216000	usd
CY2024Q2	us-gaap	Interest Costs Incurred Capitalized InterestCostsIncurredCapitalized	13786000	usd
CY2023Q2	us-gaap	Interest Costs Incurred Capitalized InterestCostsIncurredCapitalized	26969000	usd
	us-gaap	Interest Costs Incurred Capitalized InterestCostsIncurredCapitalized	31733000	usd
	us-gaap	Interest Costs Incurred Capitalized InterestCostsIncurredCapitalized	52433000	usd
CY2024Q2	us-gaap	Amortization Of Debt Discount Premium AmortizationOfDebtDiscountPremium	164000	usd
CY2023Q2	us-gaap	Amortization Of Debt Discount Premium AmortizationOfDebtDiscountPremium	1355000	usd
	us-gaap	Amortization Of Debt Discount Premium AmortizationOfDebtDiscountPremium	164000	usd
	us-gaap	Amortization Of Debt Discount Premium AmortizationOfDebtDiscountPremium	2842000	usd
CY2024Q2	us-gaap	Interest Income Operating InterestIncomeOperating	1202000	usd
CY2023Q2	us-gaap	Interest Income Operating InterestIncomeOperating	807000	usd
	us-gaap	Interest Income Operating InterestIncomeOperating	2070000	usd
	us-gaap	Interest Income Operating InterestIncomeOperating	1125000	usd
CY2024Q2	us-gaap	Interest Income Expense Net InterestIncomeExpenseNet	-35803000	usd
CY2023Q2	us-gaap	Interest Income Expense Net InterestIncomeExpenseNet	-40621000	usd
	us-gaap	Interest Income Expense Net InterestIncomeExpenseNet	-66976000	usd
	us-gaap	Interest Income Expense Net InterestIncomeExpenseNet	-82274000	usd
CY2024Q2	slg	Total Shares Authorized TotalSharesAuthorized	260000000	shares
CY2024Q2	slg	Total Par Or Stated Value Per Share TotalParOrStatedValuePerShare	0.01
CY2024Q2	us-gaap	Common Stock Shares Authorized CommonStockSharesAuthorized	160000000	shares
CY2024Q2	us-gaap	Common Stock Par Or Stated Value Per Share CommonStockParOrStatedValuePerShare	0.01
CY2024Q2	us-gaap	Excess Stock Shares Authorized ExcessStockSharesAuthorized	75000000	shares
CY2024Q2	slg	Excess Stock Par Or Stated Value Per Share ExcessStockParOrStatedValuePerShare	0.01
CY2024Q2	us-gaap	Preferred Stock Shares Authorized PreferredStockSharesAuthorized	25000000	shares
CY2024Q2	us-gaap	Preferred Stock Par Or Stated Value Per Share PreferredStockParOrStatedValuePerShare	0.01
CY2024Q2	us-gaap	Excess Stock Shares Issued ExcessStockSharesIssued	0	shares
CY2024Q2	us-gaap	Excess Stock Shares Outstanding ExcessStockSharesOutstanding	0	shares
CY2024Q2	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	-2160000	usd
CY2023Q2	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	-360194000	usd
	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	10981000	usd
	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	-399925000	usd
CY2024Q2	us-gaap	Distributed Earnings DistributedEarnings	436000	usd
CY2023Q2	us-gaap	Distributed Earnings DistributedEarnings	407000	usd
	us-gaap	Distributed Earnings DistributedEarnings	872000	usd
	us-gaap	Distributed Earnings DistributedEarnings	813000	usd
CY2024Q2	slg	Net Income Loss Available To Common Stockholders After Distributed And Undistributed Earnings Allocation Basic NetIncomeLossAvailableToCommonStockholdersAfterDistributedAndUndistributedEarningsAllocationBasic	-2596000	usd
CY2023Q2	slg	Net Income Loss Available To Common Stockholders After Distributed And Undistributed Earnings Allocation Basic NetIncomeLossAvailableToCommonStockholdersAfterDistributedAndUndistributedEarningsAllocationBasic	-360601000	usd
	slg	Net Income Loss Available To Common Stockholders After Distributed And Undistributed Earnings Allocation Basic NetIncomeLossAvailableToCommonStockholdersAfterDistributedAndUndistributedEarningsAllocationBasic	10109000	usd
	slg	Net Income Loss Available To Common Stockholders After Distributed And Undistributed Earnings Allocation Basic NetIncomeLossAvailableToCommonStockholdersAfterDistributedAndUndistributedEarningsAllocationBasic	-400738000	usd
CY2024Q2	us-gaap	Undistributed Earnings Loss Allocated To Participating Securities Diluted UndistributedEarningsLossAllocatedToParticipatingSecuritiesDiluted	0	usd
CY2023Q2	us-gaap	Undistributed Earnings Loss Allocated To Participating Securities Diluted UndistributedEarningsLossAllocatedToParticipatingSecuritiesDiluted	0	usd
	us-gaap	Undistributed Earnings Loss Allocated To Participating Securities Diluted UndistributedEarningsLossAllocatedToParticipatingSecuritiesDiluted	-436000	usd
	us-gaap	Undistributed Earnings Loss Allocated To Participating Securities Diluted UndistributedEarningsLossAllocatedToParticipatingSecuritiesDiluted	0	usd
CY2024Q2	us-gaap	Dilutive Securities Effect On Basic Earnings Per Share Other DilutiveSecuritiesEffectOnBasicEarningsPerShareOther	-99000	usd
CY2023Q2	us-gaap	Dilutive Securities Effect On Basic Earnings Per Share Other DilutiveSecuritiesEffectOnBasicEarningsPerShareOther	-24081000	usd
	us-gaap	Dilutive Securities Effect On Basic Earnings Per Share Other DilutiveSecuritiesEffectOnBasicEarningsPerShareOther	748000	usd
	us-gaap	Dilutive Securities Effect On Basic Earnings Per Share Other DilutiveSecuritiesEffectOnBasicEarningsPerShareOther	-25919000	usd
CY2024Q2	us-gaap	Net Income Loss Available To Common Stockholders Diluted NetIncomeLossAvailableToCommonStockholdersDiluted	-2695000	usd
CY2023Q2	us-gaap	Net Income Loss Available To Common Stockholders Diluted NetIncomeLossAvailableToCommonStockholdersDiluted	-384682000	usd
	us-gaap	Net Income Loss Available To Common Stockholders Diluted NetIncomeLossAvailableToCommonStockholdersDiluted	11293000	usd
	us-gaap	Net Income Loss Available To Common Stockholders Diluted NetIncomeLossAvailableToCommonStockholdersDiluted	-426657000	usd
CY2024Q2	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	64353000	shares
CY2023Q2	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	64102000	shares
	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	64340000	shares
	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	64091000	shares
CY2024Q2	slg	Incremental Common Shares Attributable To Redemption Of Units To Common Shares IncrementalCommonSharesAttributableToRedemptionOfUnitsToCommonShares	4387000	shares
CY2023Q2	slg	Incremental Common Shares Attributable To Redemption Of Units To Common Shares IncrementalCommonSharesAttributableToRedemptionOfUnitsToCommonShares	4239000	shares
	slg	Incremental Common Shares Attributable To Redemption Of Units To Common Shares IncrementalCommonSharesAttributableToRedemptionOfUnitsToCommonShares	4413000	shares
	slg	Incremental Common Shares Attributable To Redemption Of Units To Common Shares IncrementalCommonSharesAttributableToRedemptionOfUnitsToCommonShares	4172000	shares
CY2024Q2	us-gaap	Incremental Common Shares Attributable To Share Based Payment Arrangements IncrementalCommonSharesAttributableToShareBasedPaymentArrangements	0	shares
CY2023Q2	us-gaap	Incremental Common Shares Attributable To Share Based Payment Arrangements IncrementalCommonSharesAttributableToShareBasedPaymentArrangements	0	shares
	us-gaap	Incremental Common Shares Attributable To Share Based Payment Arrangements IncrementalCommonSharesAttributableToShareBasedPaymentArrangements	1384000	shares
	us-gaap	Incremental Common Shares Attributable To Share Based Payment Arrangements IncrementalCommonSharesAttributableToShareBasedPaymentArrangements	0	shares
CY2024Q2	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	68740000	shares
CY2023Q2	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	68341000	shares
	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	70137000	shares
	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	68263000	shares
CY2024Q2	us-gaap	Antidilutive Securities Excluded From Computation Of Earnings Per Share Amount AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount	1574571	shares
	us-gaap	Antidilutive Securities Excluded From Computation Of Earnings Per Share Amount AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount	135000	shares
CY2023Q2	us-gaap	Antidilutive Securities Excluded From Computation Of Earnings Per Share Amount AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount	1529312	shares
	us-gaap	Antidilutive Securities Excluded From Computation Of Earnings Per Share Amount AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount	1381565	shares
CY2024Q2	us-gaap	Employee Service Share Based Compensation Allocation Of Recognized Period Costs Capitalized Amount EmployeeServiceShareBasedCompensationAllocationOfRecognizedPeriodCostsCapitalizedAmount	400000	usd
	us-gaap	Employee Service Share Based Compensation Allocation Of Recognized Period Costs Capitalized Amount EmployeeServiceShareBasedCompensationAllocationOfRecognizedPeriodCostsCapitalizedAmount	800000	usd
CY2023Q2	us-gaap	Employee Service Share Based Compensation Allocation Of Recognized Period Costs Capitalized Amount EmployeeServiceShareBasedCompensationAllocationOfRecognizedPeriodCostsCapitalizedAmount	300000	usd
	us-gaap	Employee Service Share Based Compensation Allocation Of Recognized Period Costs Capitalized Amount EmployeeServiceShareBasedCompensationAllocationOfRecognizedPeriodCostsCapitalizedAmount	700000	usd
CY2024Q2	slg	Other Comprehensive Income Loss Deferred Net Lossfrom Terminated Hedges OtherComprehensiveIncomeLossDeferredNetLossfromTerminatedHedges	-300000	usd
CY2023Q4	slg	Other Comprehensive Income Loss Deferred Net Lossfrom Terminated Hedges OtherComprehensiveIncomeLossDeferredNetLossfromTerminatedHedges	-400000	usd
CY2024Q2	us-gaap	Debt Securities Available For Sale Excluding Accrued Interest DebtSecuritiesAvailableForSaleExcludingAccruedInterest	16593000	usd
CY2024Q2	us-gaap	Derivative Fair Value Of Derivative Asset DerivativeFairValueOfDerivativeAsset	55531000	usd
CY2024Q2	us-gaap	Derivative Fair Value Of Derivative Liability DerivativeFairValueOfDerivativeLiability	11224000	usd
CY2023Q4	us-gaap	Debt Securities Available For Sale Excluding Accrued Interest DebtSecuritiesAvailableForSaleExcludingAccruedInterest	9591000	usd
CY2023Q4	us-gaap	Derivative Fair Value Of Derivative Asset DerivativeFairValueOfDerivativeAsset	33456000	usd
CY2023Q4	us-gaap	Derivative Fair Value Of Derivative Liability DerivativeFairValueOfDerivativeLiability	17108000	usd
CY2024Q2	us-gaap	Derivative Net Liability Position Aggregate Fair Value DerivativeNetLiabilityPositionAggregateFairValue	-11600000	usd
CY2024Q2	us-gaap	Assets Needed For Immediate Settlement Aggregate Fair Value AssetsNeededForImmediateSettlementAggregateFairValue	12200000	usd
	us-gaap	Cash Flow Hedge Gain Loss To Be Reclassified Within Twelve Months CashFlowHedgeGainLossToBeReclassifiedWithinTwelveMonths	-31600000	usd
CY2024Q2	us-gaap	Other Comprehensive Income Loss Cash Flow Hedge Gain Loss Before Reclassification And Tax OtherComprehensiveIncomeLossCashFlowHedgeGainLossBeforeReclassificationAndTax	13028000	usd
CY2023Q2	us-gaap	Other Comprehensive Income Loss Cash Flow Hedge Gain Loss Before Reclassification And Tax OtherComprehensiveIncomeLossCashFlowHedgeGainLossBeforeReclassificationAndTax	56662000	usd
CY2024Q2	us-gaap	Interest Rate Cash Flow Hedge Gain Loss Reclassified To Earnings Net InterestRateCashFlowHedgeGainLossReclassifiedToEarningsNet	-13126000	usd
CY2023Q2	us-gaap	Interest Rate Cash Flow Hedge Gain Loss Reclassified To Earnings Net InterestRateCashFlowHedgeGainLossReclassifiedToEarningsNet	-15340000	usd
	us-gaap	Other Comprehensive Income Loss Cash Flow Hedge Gain Loss Before Reclassification And Tax OtherComprehensiveIncomeLossCashFlowHedgeGainLossBeforeReclassificationAndTax	49889000	usd
	us-gaap	Other Comprehensive Income Loss Cash Flow Hedge Gain Loss Before Reclassification And Tax OtherComprehensiveIncomeLossCashFlowHedgeGainLossBeforeReclassificationAndTax	37254000	usd
	us-gaap	Interest Rate Cash Flow Hedge Gain Loss Reclassified To Earnings Net InterestRateCashFlowHedgeGainLossReclassifiedToEarningsNet	-26773000	usd
	us-gaap	Interest Rate Cash Flow Hedge Gain Loss Reclassified To Earnings Net InterestRateCashFlowHedgeGainLossReclassifiedToEarningsNet	-26991000	usd
CY2024Q2	us-gaap	Operating Lease Lease Income Lease Payments OperatingLeaseLeaseIncomeLeasePayments	136427000	usd
CY2023Q2	us-gaap	Operating Lease Lease Income Lease Payments OperatingLeaseLeaseIncomeLeasePayments	159437000	usd
	us-gaap	Operating Lease Lease Income Lease Payments OperatingLeaseLeaseIncomeLeasePayments	264680000	usd
	us-gaap	Operating Lease Lease Income Lease Payments OperatingLeaseLeaseIncomeLeasePayments	325790000	usd
CY2024Q2	us-gaap	Operating Lease Variable Lease Income OperatingLeaseVariableLeaseIncome	15069000	usd
CY2023Q2	us-gaap	Operating Lease Variable Lease Income OperatingLeaseVariableLeaseIncome	20294000	usd
	us-gaap	Operating Lease Variable Lease Income OperatingLeaseVariableLeaseIncome	28370000	usd
	us-gaap	Operating Lease Variable Lease Income OperatingLeaseVariableLeaseIncome	40744000	usd
CY2024Q2	slg	Operating Lease Lease Income Fixed And Variable Lease Payments OperatingLeaseLeaseIncomeFixedAndVariableLeasePayments	151496000	usd
CY2023Q2	slg	Operating Lease Lease Income Fixed And Variable Lease Payments OperatingLeaseLeaseIncomeFixedAndVariableLeasePayments	179731000	usd
	slg	Operating Lease Lease Income Fixed And Variable Lease Payments OperatingLeaseLeaseIncomeFixedAndVariableLeasePayments	293050000	usd
	slg	Operating Lease Lease Income Fixed And Variable Lease Payments OperatingLeaseLeaseIncomeFixedAndVariableLeasePayments	366534000	usd
CY2024Q2	us-gaap	Amortization Of Above And Below Market Leases AmortizationOfAboveAndBelowMarketLeases	-864000	usd
CY2023Q2	us-gaap	Amortization Of Above And Below Market Leases AmortizationOfAboveAndBelowMarketLeases	6214000	usd
	us-gaap	Amortization Of Above And Below Market Leases AmortizationOfAboveAndBelowMarketLeases	-914000	usd
	us-gaap	Amortization Of Above And Below Market Leases AmortizationOfAboveAndBelowMarketLeases	14453000	usd
CY2024Q2	us-gaap	Operating Lease Lease Income OperatingLeaseLeaseIncome	150632000	usd
CY2023Q2	us-gaap	Operating Lease Lease Income OperatingLeaseLeaseIncome	185945000	usd
	us-gaap	Operating Lease Lease Income OperatingLeaseLeaseIncome	292136000	usd
	us-gaap	Operating Lease Lease Income OperatingLeaseLeaseIncome	380987000	usd
CY2024Q2	us-gaap	Sublease Income SubleaseIncome	45900000	usd
	us-gaap	Sublease Income SubleaseIncome	94300000	usd
CY2023Q2	us-gaap	Sublease Income SubleaseIncome	48900000	usd
	us-gaap	Sublease Income SubleaseIncome	97800000	usd
CY2024Q2	us-gaap	Sales Type Lease Interest Income SalesTypeLeaseInterestIncome	1123000	usd
CY2023Q2	us-gaap	Sales Type Lease Interest Income SalesTypeLeaseInterestIncome	1109000	usd
	us-gaap	Sales Type Lease Interest Income SalesTypeLeaseInterestIncome	2243000	usd
	us-gaap	Sales Type Lease Interest Income SalesTypeLeaseInterestIncome	2215000	usd
	us-gaap	Number Of Reportable Segments NumberOfReportableSegments	3	segment
CY2024Q2	us-gaap	Revenues Revenues	222820000	usd
CY2023Q2	us-gaap	Revenues Revenues	246036000	usd
	us-gaap	Revenues Revenues	410702000	usd
	us-gaap	Revenues Revenues	491800000	usd
CY2024Q2	slg	Income Loss From Continuing Operations Before Realized Gain Loss On Disposal Of Equity Method Investment IncomeLossFromContinuingOperationsBeforeRealizedGainLossOnDisposalOfEquityMethodInvestment	1959000	usd
CY2023Q2	slg	Income Loss From Continuing Operations Before Realized Gain Loss On Disposal Of Equity Method Investment IncomeLossFromContinuingOperationsBeforeRealizedGainLossOnDisposalOfEquityMethodInvestment	-379228000	usd
	slg	Income Loss From Continuing Operations Before Realized Gain Loss On Disposal Of Equity Method Investment IncomeLossFromContinuingOperationsBeforeRealizedGainLossOnDisposalOfEquityMethodInvestment	20348000	usd
	slg	Income Loss From Continuing Operations Before Realized Gain Loss On Disposal Of Equity Method Investment IncomeLossFromContinuingOperationsBeforeRealizedGainLossOnDisposalOfEquityMethodInvestment	-417585000	usd
CY2024Q2	us-gaap	Assets Assets	9548652000	usd
CY2023Q4	us-gaap	Assets Assets	9531181000	usd
	us-gaap	Number Of Reportable Segments NumberOfReportableSegments	3	segment
CY2024Q2	us-gaap	Selling General And Administrative Expense SellingGeneralAndAdministrativeExpense	20000000.0	usd
	us-gaap	Selling General And Administrative Expense SellingGeneralAndAdministrativeExpense	41300000	usd
CY2023Q2	us-gaap	Selling General And Administrative Expense SellingGeneralAndAdministrativeExpense	23000000.0	usd
	us-gaap	Selling General And Administrative Expense SellingGeneralAndAdministrativeExpense	46300000	usd
	us-gaap	Number Of Reportable Segments NumberOfReportableSegments	3	segment

Files In Submission

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$SLG
SL Green Realty Corp Stock $slg

2024 Q3 Form 10-Q Financial Statement

#000104097124000025 Filed on July 31, 2024

Income Statement

Balance Sheet

Cashflow Statement

Facts In Submission

Files In Submission

$SLG SL Green Realty Corp Stock $slg

2024 Q3 Form 10-Q Financial Statement

#000104097124000025 Filed on July 31, 2024

Income Statement

Balance Sheet

Cashflow Statement

Facts In Submission

Files In Submission

$SLG
SL Green Realty Corp Stock $slg