$SLG
SL Green Realty Corp Stock $slg

$slg Overview Financials Valuation SEC Filings Company Website

2022 Q1 Form 10-Q Financial Statement

#000104097122000026 Filed on May 09, 2022

Income Statement

Concept	2022 Q1	2021 Q4	2021 Q1
Revenue	$188.0M	$194.6M	$226.1M
YoY Change	-16.87%	-17.16%	-28.06%
Cost Of Revenue	$79.89M	$78.37M	$94.40M
YoY Change	-15.37%	-16.54%	-12.51%
Gross Profit	$108.1M	$116.2M	$131.7M
YoY Change	-17.94%	-17.58%	-36.19%
Gross Profit Margin	57.5%	59.72%	58.25%
Selling, General & Admin	$24.80M	$30.04M	$22.90M
YoY Change	8.3%	19.22%	16.84%
% of Gross Profit	22.95%	25.85%	17.39%
Research & Development
YoY Change
% of Gross Profit
Depreciation & Amortization	$48.93M	$49.25M	$66.77M
YoY Change	-26.72%	-18.59%	-5.66%
% of Gross Profit	45.28%	42.38%	50.7%
Operating Expenses	$24.80M	$80.31M	$22.90M
YoY Change	8.3%	-11.16%	16.84%
Operating Profit	$83.27M	$35.90M	$108.8M
YoY Change	-23.47%	-29.05%	-41.76%
Interest Expense	$32.05M	-$66.51M	$39.87M
YoY Change	-19.6%	-143.84%	-29.83%
% of Operating Profit	38.49%	-185.27%	36.64%
Other Income/Expense, Net	$0.00	-$18.10M	-$8.200M
YoY Change	-100.0%	-66.36%
Pretax Income	$13.49M	-$48.18M	-$3.900M
YoY Change	-445.77%	-124.05%	-103.07%
Income Tax	$900.0K		$700.0K
% Of Pretax Income	6.67%
Net Earnings	$11.49M	-$45.72M	-$3.726M
YoY Change	-408.35%	-125.89%	-103.14%
Net Earnings / Revenue	6.11%	-23.5%	-1.65%
Basic Earnings Per Share	$0.12		-$0.12
Diluted Earnings Per Share	$0.11	-$810.5K	-$0.12
COMMON SHARES
Basic Shares Outstanding	64.35M shares	66.73M shares	66.96M shares
Diluted Shares Outstanding	70.23M shares		72.00M shares

Balance Sheet

Concept	2022 Q1	2021 Q4	2021 Q1
SHORT-TERM ASSETS
Cash & Short-Term Investments	$256.6M	$286.2M	$328.8M
YoY Change	-21.97%	-2.87%	-43.27%
Cash & Equivalents	$223.7M	$251.4M	$305.0M
Short-Term Investments	$32.89M	$34.75M	$23.78M
Other Short-Term Assets
YoY Change
Inventory	$49.76M	$140.9M
Prepaid Expenses
Receivables	$323.0M	$325.3M	$381.0M
Other Receivables	$0.00	$0.00	$0.00
Total Short-Term Assets	$596.4M	$717.6M	$686.0M
YoY Change	-13.06%	10.74%	-29.93%
LONG-TERM ASSETS
Property, Plant & Equipment	$5.762B	$5.755B	$5.826B
YoY Change	-1.1%	6.59%	-15.95%
Goodwill
YoY Change
Intangibles
YoY Change
Long-Term Investments	$3.001B	$2.998B	$3.699B
YoY Change	-18.86%	-21.59%	29.85%
Other Assets	$205.9M	$210.1M	$267.0M
YoY Change	-22.87%	-26.03%	-10.7%
Total Long-Term Assets	$10.42B	$10.35B	$11.36B
YoY Change	-8.27%	-6.42%	-7.22%
TOTAL ASSETS
Total Short-Term Assets	$596.4M	$717.6M	$686.0M
Total Long-Term Assets	$10.42B	$10.35B	$11.36B
Total Assets	$11.01B	$11.07B	$12.04B
YoY Change	-8.54%	-5.47%	-8.9%
SHORT-TERM LIABILITIES
YoY Change
Accounts Payable	$139.5M	$157.6M	$120.0M
YoY Change	16.22%	4.35%	-24.53%
Accrued Expenses	$873.7M	$864.1M	$478.0M
YoY Change	82.79%	144.09%	22.56%
Deferred Revenue
YoY Change
Short-Term Debt	$0.00	$0.00	$0.00
YoY Change
Long-Term Debt Due
YoY Change
Total Short-Term Liabilities	$1.091B	$1.261B	$677.0M
YoY Change	61.15%	78.15%	6.61%
LONG-TERM LIABILITIES
Long-Term Debt	$4.182B	$4.120B	$5.471B
YoY Change	-23.56%	-18.91%	-12.97%
Other Long-Term Liabilities	$450.9M	$366.8M	$387.0M
YoY Change	16.52%	-12.88%	16.92%
Total Long-Term Liabilities	$4.633B	$4.487B	$5.858B
YoY Change	-20.91%	-18.45%	-11.47%
TOTAL LIABILITIES
Total Short-Term Liabilities	$1.091B	$1.261B	$677.0M
Total Long-Term Liabilities	$4.633B	$4.487B	$5.858B
Total Liabilities	$5.724B	$5.748B	$6.536B
YoY Change	-12.42%	-7.46%	-9.87%
SHAREHOLDERS EQUITY
Retained Earnings	$846.6M	$975.8M	$918.1M
YoY Change	-7.78%	-3.91%	-16.49%
Common Stock	$653.0K	$672.0K	$705.0K
YoY Change	-7.38%	-6.15%	-9.15%
Preferred Stock
YoY Change
Treasury Stock (at cost)	$128.7M	$126.2M	$124.0M
YoY Change	3.71%	1.7%	0.0%
Treasury Stock Shares	1.060M shares	1.027M shares	1.026M shares
Shareholders Equity	$4.726B	$4.765B	$4.911B
YoY Change
Total Liabilities & Shareholders Equity	$11.01B	$11.07B	$12.04B
YoY Change	-8.54%	-5.47%	-8.9%

Cashflow Statement

Concept	2022 Q1	2021 Q4	2021 Q1
OPERATING ACTIVITIES
Net Income	$11.49M	-$45.72M	-$3.726M
YoY Change	-408.35%	-125.89%	-103.14%
Depreciation, Depletion And Amortization	$48.93M	$49.25M	$66.77M
YoY Change	-26.72%	-18.59%	-5.66%
Cash From Operating Activities	$81.40M	$64.97M	$18.60M
YoY Change	337.6%	-71.29%	-55.74%
INVESTING ACTIVITIES
Capital Expenditures	-$61.68M	-$94.11M	-$49.30M
YoY Change	25.11%	-46.68%	-73.86%
Acquisitions
YoY Change
Other Investing Activities	$75.18M	$200.8M	$69.50M
YoY Change	8.17%	-76.59%	17.4%
Cash From Investing Activities	$13.50M	$106.7M	$20.18M
YoY Change	-33.13%	-84.34%	-115.59%
FINANCING ACTIVITIES
Cash Dividend Paid	$66.34M		$69.77M
YoY Change	-4.92%		-12.41%
Common Stock Issuance & Retirement, Net	$151.2M		$84.09M
YoY Change	79.81%		-61.7%
Debt Paid & Issued, Net
YoY Change
Cash From Financing Activities	-$124.6M	-180.6M	-$9.971M
YoY Change	1149.26%	-78.48%	-102.14%
NET CHANGE
Cash From Operating Activities	$81.40M	64.97M	$18.60M
Cash From Investing Activities	$13.50M	106.7M	$20.18M
Cash From Financing Activities	-$124.6M	-180.6M	-$9.971M
Net Change In Cash	-$29.67M	-8.949M	$28.81M
YoY Change	-202.96%	-113.1%	-92.41%
FREE CASH FLOW
Cash From Operating Activities	$81.40M	$64.97M	$18.60M
Capital Expenditures	-$61.68M	-$94.11M	-$49.30M
Free Cash Flow	$143.1M	$159.1M	$67.90M
YoY Change	110.72%	-60.51%	-70.56%

Facts In Submission

Frame	Concept Type	Concept / XBRL Key	Value	Unit
CY2022Q1	dei	Entity Central Index Key EntityCentralIndexKey	0001040971
CY2022Q1	dei	Current Fiscal Year End Date CurrentFiscalYearEndDate	--12-31
CY2022Q1	dei	Document Fiscal Year Focus DocumentFiscalYearFocus	2022
CY2022Q1	dei	Document Fiscal Period Focus DocumentFiscalPeriodFocus	Q1
CY2022Q1	dei	Amendment Flag AmendmentFlag	false
CY2022Q1	dei	Entity Emerging Growth Company EntityEmergingGrowthCompany	false
CY2022Q1	dei	Entity Shell Company EntityShellCompany	false
CY2022Q2	dei	Entity Common Stock Shares Outstanding EntityCommonStockSharesOutstanding	64124349	shares
CY2022Q1	dei	Document Type DocumentType	10-Q
CY2022Q1	dei	Document Quarterly Report DocumentQuarterlyReport	true
CY2022Q1	dei	Document Period End Date DocumentPeriodEndDate	2022-03-31
CY2022Q1	dei	Document Transition Report DocumentTransitionReport	false
CY2022Q1	dei	Entity File Number EntityFileNumber	1-13199
CY2022Q1	dei	Entity Registrant Name EntityRegistrantName	SL GREEN REALTY CORP
CY2022Q1	dei	Entity Incorporation State Country Code EntityIncorporationStateCountryCode	MD
CY2022Q1	dei	Entity Tax Identification Number EntityTaxIdentificationNumber	13-3956775
CY2022Q1	dei	Entity Address Address Line1 EntityAddressAddressLine1	One Vanderbilt Avenue
CY2022Q1	dei	Entity Address City Or Town EntityAddressCityOrTown	New York
CY2022Q1	dei	Entity Address State Or Province EntityAddressStateOrProvince	NY
CY2022Q1	dei	Entity Address Postal Zip Code EntityAddressPostalZipCode	10017
CY2022Q1	dei	City Area Code CityAreaCode	212
CY2022Q1	dei	Local Phone Number LocalPhoneNumber	594-2700
CY2022Q1	dei	Entity Current Reporting Status EntityCurrentReportingStatus	Yes
CY2022Q1	dei	Entity Interactive Data Current EntityInteractiveDataCurrent	Yes
CY2022Q1	dei	Entity Filer Category EntityFilerCategory	Large Accelerated Filer
CY2022Q1	dei	Entity Small Business EntitySmallBusiness	false
CY2022Q1	us-gaap	Land Land	1352610000	USD
CY2021Q4	us-gaap	Land Land	1350701000	USD
CY2022Q1	us-gaap	Investment Building And Building Improvements InvestmentBuildingAndBuildingImprovements	3709795000	USD
CY2021Q4	us-gaap	Investment Building And Building Improvements InvestmentBuildingAndBuildingImprovements	3671402000	USD
CY2022Q1	slg	Building Leasehold Improvements Gross BuildingLeaseholdImprovementsGross	1654571000	USD
CY2021Q4	slg	Building Leasehold Improvements Gross BuildingLeaseholdImprovementsGross	1645081000	USD
CY2022Q1	us-gaap	Operating Lease Right Of Use Asset OperatingLeaseRightOfUseAsset	983723000	USD
CY2021Q4	us-gaap	Operating Lease Right Of Use Asset OperatingLeaseRightOfUseAsset	983723000	USD
CY2022Q1	us-gaap	Real Estate Investment Property At Cost RealEstateInvestmentPropertyAtCost	7700699000	USD
CY2021Q4	us-gaap	Real Estate Investment Property At Cost RealEstateInvestmentPropertyAtCost	7650907000	USD
CY2022Q1	us-gaap	Real Estate Investment Property Accumulated Depreciation RealEstateInvestmentPropertyAccumulatedDepreciation	1938804000	USD
CY2021Q4	us-gaap	Real Estate Investment Property Accumulated Depreciation RealEstateInvestmentPropertyAccumulatedDepreciation	1896199000	USD
CY2022Q1	us-gaap	Real Estate Investment Property Net RealEstateInvestmentPropertyNet	5761895000	USD
CY2021Q4	us-gaap	Real Estate Investment Property Net RealEstateInvestmentPropertyNet	5754708000	USD
CY2022Q1	us-gaap	Assets Of Disposal Group Including Discontinued Operation AssetsOfDisposalGroupIncludingDiscontinuedOperation	49757000	USD
CY2021Q4	us-gaap	Assets Of Disposal Group Including Discontinued Operation AssetsOfDisposalGroupIncludingDiscontinuedOperation	140855000	USD
CY2022Q1	us-gaap	Unsecured Debt UnsecuredDebt	899541000	USD
CY2022Q1	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	223674000	USD
CY2021Q4	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	251417000	USD
CY2022Q1	us-gaap	Restricted Cash And Cash Equivalents RestrictedCashAndCashEquivalents	83644000	USD
CY2021Q4	us-gaap	Restricted Cash And Cash Equivalents RestrictedCashAndCashEquivalents	85567000	USD
CY2022Q1	us-gaap	Marketable Securities MarketableSecurities	32889000	USD
CY2021Q4	us-gaap	Marketable Securities MarketableSecurities	34752000	USD
CY2022Q1	us-gaap	Accounts And Notes Receivable Net AccountsAndNotesReceivableNet	41257000	USD
CY2021Q4	us-gaap	Accounts And Notes Receivable Net AccountsAndNotesReceivableNet	47616000	USD
CY2022Q1	us-gaap	Due From Related Parties DueFromRelatedParties	31711000	USD
CY2021Q4	us-gaap	Due From Related Parties DueFromRelatedParties	29408000	USD
CY2022Q1	us-gaap	Deferred Rent Receivables Net DeferredRentReceivablesNet	250028000	USD
CY2021Q4	us-gaap	Deferred Rent Receivables Net DeferredRentReceivablesNet	248313000	USD
CY2022Q1	slg	Discount Of Structured Finance Investments DiscountOfStructuredFinanceInvestments	3670000	USD
CY2021Q4	slg	Discount Of Structured Finance Investments DiscountOfStructuredFinanceInvestments	5057000	USD
CY2022Q1	us-gaap	Allowance For Loan And Lease Losses Real Estate AllowanceForLoanAndLeaseLossesRealEstate	6630000	USD
CY2021Q4	us-gaap	Allowance For Loan And Lease Losses Real Estate AllowanceForLoanAndLeaseLossesRealEstate	6630000	USD
CY2021Q4	us-gaap	Deferred Costs Current And Noncurrent DeferredCostsCurrentAndNoncurrent	124495000	USD
CY2022Q1	us-gaap	Other Assets OtherAssets	308960000	USD
CY2022Q1	us-gaap	Mortgage Loans On Real Estate Commercial And Consumer Net MortgageLoansOnRealEstateCommercialAndConsumerNet	1107870000	USD
CY2021Q4	us-gaap	Mortgage Loans On Real Estate Commercial And Consumer Net MortgageLoansOnRealEstateCommercialAndConsumerNet	1088723000	USD
CY2022Q1	us-gaap	Equity Method Investments EquityMethodInvestments	3000986000	USD
CY2021Q4	us-gaap	Equity Method Investments EquityMethodInvestments	2997934000	USD
CY2022Q1	us-gaap	Deferred Costs Current And Noncurrent DeferredCostsCurrentAndNoncurrent	122294000	USD
CY2021Q4	us-gaap	Other Assets OtherAssets	262841000	USD
CY2022Q1	us-gaap	Assets Assets	11014965000	USD
CY2021Q4	us-gaap	Assets Assets	11066629000	USD
CY2022Q1	us-gaap	Secured Debt SecuredDebt	1344775000	USD
CY2021Q4	us-gaap	Secured Debt SecuredDebt	1394386000	USD
CY2022Q1	us-gaap	Line Of Credit LineOfCredit	491998000	USD
CY2021Q4	us-gaap	Line Of Credit LineOfCredit	381334000	USD
CY2022Q1	us-gaap	Senior Notes SeniorNotes	1242345000	USD
CY2021Q4	us-gaap	Senior Notes SeniorNotes	1242002000	USD
CY2021Q4	us-gaap	Unsecured Debt UnsecuredDebt	899308000	USD
CY2022Q1	us-gaap	Interest Payable Current And Noncurrent InterestPayableCurrentAndNoncurrent	21545000	USD
CY2021Q4	us-gaap	Interest Payable Current And Noncurrent InterestPayableCurrentAndNoncurrent	12698000	USD
CY2022Q1	us-gaap	Other Liabilities OtherLiabilities	276254000	USD
CY2021Q4	us-gaap	Other Liabilities OtherLiabilities	195390000	USD
CY2022Q1	us-gaap	Accounts Payable And Accrued Liabilities Current And Noncurrent AccountsPayableAndAccruedLiabilitiesCurrentAndNoncurrent	139460000	USD
CY2021Q4	us-gaap	Accounts Payable And Accrued Liabilities Current And Noncurrent AccountsPayableAndAccruedLiabilitiesCurrentAndNoncurrent	157571000	USD
CY2022Q1	us-gaap	Contract With Customer Liability ContractWithCustomerLiability	110631000	USD
CY2021Q4	us-gaap	Contract With Customer Liability ContractWithCustomerLiability	107275000	USD
CY2022Q1	us-gaap	Finance Lease Liability FinanceLeaseLiability	103238000	USD
CY2021Q4	us-gaap	Finance Lease Liability FinanceLeaseLiability	102914000	USD
CY2022Q1	us-gaap	Operating Lease Liability OperatingLeaseLiability	852194000	USD
CY2021Q4	us-gaap	Operating Lease Liability OperatingLeaseLiability	851370000	USD
CY2022Q1	us-gaap	Dividends Payable Current And Noncurrent DividendsPayableCurrentAndNoncurrent	23628000	USD
CY2021Q4	us-gaap	Dividends Payable Current And Noncurrent DividendsPayableCurrentAndNoncurrent	187372000	USD
CY2022Q1	us-gaap	Security Deposit Liability SecurityDepositLiability	54179000	USD
CY2021Q4	us-gaap	Security Deposit Liability SecurityDepositLiability	52309000	USD
CY2022Q1	us-gaap	Liabilities Of Disposal Group Including Discontinued Operation LiabilitiesOfDisposalGroupIncludingDiscontinuedOperation	64041000	USD
CY2021Q4	us-gaap	Liabilities Of Disposal Group Including Discontinued Operation LiabilitiesOfDisposalGroupIncludingDiscontinuedOperation	64120000	USD
CY2022Q1	us-gaap	Junior Subordinated Debenture Owed To Unconsolidated Subsidiary Trust JuniorSubordinatedDebentureOwedToUnconsolidatedSubsidiaryTrust	100000000	USD
CY2021Q4	us-gaap	Junior Subordinated Debenture Owed To Unconsolidated Subsidiary Trust JuniorSubordinatedDebentureOwedToUnconsolidatedSubsidiaryTrust	100000000	USD
CY2022Q1	us-gaap	Liabilities Liabilities	5723829000	USD
CY2021Q4	us-gaap	Liabilities Liabilities	5748049000	USD
CY2022Q1	us-gaap	Commitments And Contingencies CommitmentsAndContingencies		USD
CY2021Q4	us-gaap	Commitments And Contingencies CommitmentsAndContingencies		USD
CY2022Q1	us-gaap	Redeemable Noncontrolling Interest Equity Common Carrying Amount RedeemableNoncontrollingInterestEquityCommonCarryingAmount	374078000	USD
CY2021Q4	us-gaap	Redeemable Noncontrolling Interest Equity Common Carrying Amount RedeemableNoncontrollingInterestEquityCommonCarryingAmount	344252000	USD
CY2022Q1	us-gaap	Redeemable Noncontrolling Interest Equity Preferred Carrying Amount RedeemableNoncontrollingInterestEquityPreferredCarryingAmount	177943000	USD
CY2021Q4	us-gaap	Redeemable Noncontrolling Interest Equity Preferred Carrying Amount RedeemableNoncontrollingInterestEquityPreferredCarryingAmount	196075000	USD
CY2022Q1	us-gaap	Preferred Stock Value PreferredStockValue	221932000	USD
CY2021Q4	us-gaap	Preferred Stock Value PreferredStockValue	221932000	USD
CY2021Q4	us-gaap	Common Stock Par Or Stated Value Per Share CommonStockParOrStatedValuePerShare	0.01
CY2022Q1	us-gaap	Common Stock Par Or Stated Value Per Share CommonStockParOrStatedValuePerShare	0.01
CY2022Q1	us-gaap	Common Stock Shares Authorized CommonStockSharesAuthorized	160000000	shares
CY2021Q4	us-gaap	Common Stock Shares Authorized CommonStockSharesAuthorized	160000000	shares
CY2022Q1	us-gaap	Common Stock Shares Outstanding CommonStockSharesOutstanding	65184000	shares
CY2022Q1	us-gaap	Common Stock Shares Issued CommonStockSharesIssued	65184000	shares
CY2021Q4	us-gaap	Common Stock Shares Issued CommonStockSharesIssued	65132000	shares
CY2021Q4	us-gaap	Common Stock Shares Outstanding CommonStockSharesOutstanding	65132000	shares
CY2022Q1	us-gaap	Treasury Stock Shares TreasuryStockShares	1060000	shares
CY2021Q4	us-gaap	Treasury Stock Shares TreasuryStockShares	1027000	shares
CY2022Q1	us-gaap	Common Stock Value CommonStockValue	653000	USD
CY2021Q4	us-gaap	Common Stock Value CommonStockValue	672000	USD
CY2022Q1	us-gaap	Additional Paid In Capital AdditionalPaidInCapital	3792689000	USD
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CY2022Q1	us-gaap	Treasury Stock Value TreasuryStockValue	128655000	USD
CY2021Q4	us-gaap	Treasury Stock Value TreasuryStockValue	126160000	USD
CY2022Q1	us-gaap	Accumulated Other Comprehensive Income Loss Net Of Tax AccumulatedOtherComprehensiveIncomeLossNetOfTax	-7261000	USD
CY2021Q4	us-gaap	Accumulated Other Comprehensive Income Loss Net Of Tax AccumulatedOtherComprehensiveIncomeLossNetOfTax	-46758000	USD
CY2022Q1	us-gaap	Retained Earnings Accumulated Deficit RetainedEarningsAccumulatedDeficit	846646000	USD
CY2021Q4	us-gaap	Retained Earnings Accumulated Deficit RetainedEarningsAccumulatedDeficit	975781000	USD
CY2022Q1	us-gaap	Stockholders Equity StockholdersEquity	4726004000	USD
CY2021Q4	us-gaap	Stockholders Equity StockholdersEquity	4764876000	USD
CY2022Q1	us-gaap	Nonredeemable Noncontrolling Interest NonredeemableNoncontrollingInterest	13111000	USD
CY2021Q4	us-gaap	Nonredeemable Noncontrolling Interest NonredeemableNoncontrollingInterest	13377000	USD
CY2022Q1	us-gaap	Stockholders Equity Including Portion Attributable To Noncontrolling Interest StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest	4739115000	USD
CY2021Q4	us-gaap	Stockholders Equity Including Portion Attributable To Noncontrolling Interest StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest	4778253000	USD
CY2022Q1	us-gaap	Liabilities And Stockholders Equity LiabilitiesAndStockholdersEquity	11014965000	USD
CY2021Q4	us-gaap	Liabilities And Stockholders Equity LiabilitiesAndStockholdersEquity	11066629000	USD
CY2022Q1	us-gaap	Operating Lease Lease Income OperatingLeaseLeaseIncome	156031000	USD
CY2021Q1	us-gaap	Operating Lease Lease Income OperatingLeaseLeaseIncome	188089000	USD
CY2022Q1	us-gaap	Investment Income Interest And Dividend InvestmentIncomeInterestAndDividend	19888000	USD
CY2021Q1	us-gaap	Investment Income Interest And Dividend InvestmentIncomeInterestAndDividend	19273000	USD
CY2022Q1	us-gaap	Other Income OtherIncome	12045000	USD
CY2021Q1	us-gaap	Other Income OtherIncome	18740000	USD
CY2022Q1	us-gaap	Revenues Revenues	187964000	USD
CY2021Q1	us-gaap	Revenues Revenues	226102000	USD
CY2022Q1	us-gaap	Related Party Transaction Expenses From Transactions With Related Party RelatedPartyTransactionExpensesFromTransactionsWithRelatedParty	2523000	USD
CY2021Q1	us-gaap	Related Party Transaction Expenses From Transactions With Related Party RelatedPartyTransactionExpensesFromTransactionsWithRelatedParty	2225000	USD
CY2022Q1	us-gaap	Operating Costs And Expenses OperatingCostsAndExpenses	42583000	USD
CY2021Q1	us-gaap	Operating Costs And Expenses OperatingCostsAndExpenses	42284000	USD
CY2022Q1	us-gaap	Real Estate Tax Expense RealEstateTaxExpense	30747000	USD
CY2021Q1	us-gaap	Real Estate Tax Expense RealEstateTaxExpense	45411000	USD
CY2022Q1	us-gaap	Operating Lease Cost OperatingLeaseCost	6564000	USD
CY2021Q1	us-gaap	Operating Lease Cost OperatingLeaseCost	6739000	USD
CY2022Q1	us-gaap	Interest Expense Other InterestExpenseOther	15070000	USD
CY2021Q1	us-gaap	Interest Expense Other InterestExpenseOther	23388000	USD
CY2022Q1	us-gaap	Amortization Of Financing Costs AmortizationOfFinancingCosts	1948000	USD
CY2021Q1	us-gaap	Amortization Of Financing Costs AmortizationOfFinancingCosts	3774000	USD
CY2022Q1	us-gaap	Depreciation And Amortization DepreciationAndAmortization	46983000	USD
CY2021Q1	us-gaap	Depreciation And Amortization DepreciationAndAmortization	62996000	USD
CY2022Q1	us-gaap	Other Cost And Expense Operating OtherCostAndExpenseOperating	28000	USD
CY2021Q1	us-gaap	Other Cost And Expense Operating OtherCostAndExpenseOperating	22000	USD
CY2022Q1	us-gaap	Selling General And Administrative Expense SellingGeneralAndAdministrativeExpense	24776000	USD
CY2021Q1	us-gaap	Selling General And Administrative Expense SellingGeneralAndAdministrativeExpense	22885000	USD
CY2022Q1	slg	Total Costs And Expenses Including Nonoperating Income Expense TotalCostsAndExpensesIncludingNonoperatingIncomeExpense	168699000	USD
CY2021Q1	slg	Total Costs And Expenses Including Nonoperating Income Expense TotalCostsAndExpensesIncludingNonoperatingIncomeExpense	207499000	USD
CY2022Q1	us-gaap	Income Loss From Equity Method Investments IncomeLossFromEquityMethodInvestments	-4715000	USD
CY2021Q1	us-gaap	Income Loss From Equity Method Investments IncomeLossFromEquityMethodInvestments	-2864000	USD
CY2022Q1	us-gaap	Equity Method Investment Realized Gain Loss On Disposal EquityMethodInvestmentRealizedGainLossOnDisposal	0	USD
CY2021Q1	us-gaap	Equity Method Investment Realized Gain Loss On Disposal EquityMethodInvestmentRealizedGainLossOnDisposal	-12629000	USD
CY2022Q1	slg	Purchase Price Fair Value Adjustment Gross PurchasePriceFairValueAdjustmentGross	-63000	USD
CY2021Q1	slg	Purchase Price Fair Value Adjustment Gross PurchasePriceFairValueAdjustmentGross	2664000	USD
CY2022Q1	us-gaap	Gains Losses On Sales Of Investment Real Estate GainsLossesOnSalesOfInvestmentRealEstate	-1002000	USD
CY2021Q1	us-gaap	Gains Losses On Sales Of Investment Real Estate GainsLossesOnSalesOfInvestmentRealEstate	-1388000	USD
CY2022Q1	slg	Depreciable Real Estate Reserves Effecton Earnings DepreciableRealEstateReservesEffectonEarnings	0	USD
CY2021Q1	slg	Depreciable Real Estate Reserves Effecton Earnings DepreciableRealEstateReservesEffectonEarnings	-8241000	USD
CY2022Q1	us-gaap	Profit Loss ProfitLoss	13485000	USD
CY2021Q1	us-gaap	Profit Loss ProfitLoss	-3855000	USD
CY2022Q1	us-gaap	Noncontrolling Interest In Net Income Loss Operating Partnerships Redeemable NoncontrollingInterestInNetIncomeLossOperatingPartnershipsRedeemable	492000	USD
CY2021Q1	us-gaap	Noncontrolling Interest In Net Income Loss Operating Partnerships Redeemable NoncontrollingInterestInNetIncomeLossOperatingPartnershipsRedeemable	-476000	USD
CY2022Q1	us-gaap	Noncontrolling Interest In Net Income Loss Other Noncontrolling Interests Redeemable NoncontrollingInterestInNetIncomeLossOtherNoncontrollingInterestsRedeemable	-143000	USD
CY2021Q1	us-gaap	Noncontrolling Interest In Net Income Loss Other Noncontrolling Interests Redeemable NoncontrollingInterestInNetIncomeLossOtherNoncontrollingInterestsRedeemable	-1499000	USD
CY2022Q1	us-gaap	Noncontrolling Interest In Net Income Loss Preferred Unit Holders Redeemable NoncontrollingInterestInNetIncomeLossPreferredUnitHoldersRedeemable	1647000	USD
CY2021Q1	us-gaap	Noncontrolling Interest In Net Income Loss Preferred Unit Holders Redeemable NoncontrollingInterestInNetIncomeLossPreferredUnitHoldersRedeemable	1846000	USD
CY2022Q1	us-gaap	Net Income Loss NetIncomeLoss	11489000	USD
CY2021Q1	us-gaap	Net Income Loss NetIncomeLoss	-3726000	USD
CY2022Q1	us-gaap	Dividends Preferred Stock DividendsPreferredStock	3738000	USD
CY2021Q1	us-gaap	Dividends Preferred Stock DividendsPreferredStock	3738000	USD
CY2022Q1	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	7751000	USD
CY2021Q1	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	-7464000	USD
CY2022Q1	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.12
CY2021Q1	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	-0.12
CY2022Q1	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.11
CY2021Q1	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	-0.12
CY2022Q1	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	64349000	shares
CY2021Q1	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	66961000	shares
CY2022Q1	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	70228000	shares
CY2021Q1	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	72004000	shares
CY2022Q1	us-gaap	Profit Loss ProfitLoss	13485000	USD
CY2021Q1	us-gaap	Profit Loss ProfitLoss	-3855000	USD
CY2022Q1	us-gaap	Other Comprehensive Income Loss Cash Flow Hedge Gain Loss After Reclassification And Tax OtherComprehensiveIncomeLossCashFlowHedgeGainLossAfterReclassificationAndTax	43567000	USD
CY2021Q1	us-gaap	Other Comprehensive Income Loss Cash Flow Hedge Gain Loss After Reclassification And Tax OtherComprehensiveIncomeLossCashFlowHedgeGainLossAfterReclassificationAndTax	51263000	USD
CY2022Q1	us-gaap	Other Comprehensive Income Loss Available For Sale Securities Adjustment Net Of Tax OtherComprehensiveIncomeLossAvailableForSaleSecuritiesAdjustmentNetOfTax	-1793000	USD
CY2021Q1	us-gaap	Other Comprehensive Income Loss Available For Sale Securities Adjustment Net Of Tax OtherComprehensiveIncomeLossAvailableForSaleSecuritiesAdjustmentNetOfTax	-258000	USD
CY2022Q1	us-gaap	Other Comprehensive Income Loss Net Of Tax OtherComprehensiveIncomeLossNetOfTax	41774000	USD
CY2021Q1	us-gaap	Other Comprehensive Income Loss Net Of Tax OtherComprehensiveIncomeLossNetOfTax	51005000	USD
CY2021Q1	us-gaap	Net Income Loss Attributable To Noncontrolling Interest NetIncomeLossAttributableToNoncontrollingInterest	-129000	USD
CY2022Q1	us-gaap	Comprehensive Income Net Of Tax Including Portion Attributable To Noncontrolling Interest ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest	55259000	USD
CY2021Q1	us-gaap	Comprehensive Income Net Of Tax Including Portion Attributable To Noncontrolling Interest ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest	47150000	USD
CY2022Q1	us-gaap	Net Income Loss Attributable To Noncontrolling Interest NetIncomeLossAttributableToNoncontrollingInterest	1996000	USD
CY2022Q1	us-gaap	Other Comprehensive Income Loss Net Of Tax Portion Attributable To Noncontrolling Interest OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToNoncontrollingInterest	2277000	USD
CY2021Q1	us-gaap	Other Comprehensive Income Loss Net Of Tax Portion Attributable To Noncontrolling Interest OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToNoncontrollingInterest	2655000	USD
CY2022Q1	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	50986000	USD
CY2021Q1	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	44624000	USD
CY2021Q4	us-gaap	Stockholders Equity Including Portion Attributable To Noncontrolling Interest StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest	4778253000	USD
CY2022Q1	slg	Profit Loss Less Minority Interest In Net Income Loss Operating Partnerships ProfitLossLessMinorityInterestInNetIncomeLossOperatingPartnerships	11346000	USD
CY2022Q1	us-gaap	Other Comprehensive Income Loss Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent	39497000	USD
CY2022Q1	us-gaap	Dividends Preferred Stock DividendsPreferredStock	3738000	USD
CY2022Q1	us-gaap	Stock Issued During Period Value Dividend Reinvestment Plan StockIssuedDuringPeriodValueDividendReinvestmentPlan	89000	USD
CY2022Q1	slg	Reallocationof Noncontrolling Interest In Operating Partnership Increase Decrease ReallocationofNoncontrollingInterestInOperatingPartnershipIncreaseDecrease	-43023000	USD
CY2022Q1	slg	Deferred Compensation Plan And Stock Award Net DeferredCompensationPlanAndStockAwardNet	5056000	USD
CY2022Q1	us-gaap	Treasury Stock Value Acquired Cost Method TreasuryStockValueAcquiredCostMethod	151197000	USD
CY2022Q1	us-gaap	Minority Interest Decrease From Distributions To Noncontrolling Interest Holders MinorityInterestDecreaseFromDistributionsToNoncontrollingInterestHolders	123000	USD
CY2022Q1	us-gaap	Stock Issued During Period Value Stock Dividend StockIssuedDuringPeriodValueStockDividend	160620000	USD
CY2022Q1	us-gaap	Common Stock Dividends Per Share Declared CommonStockDividendsPerShareDeclared	0.932
CY2022Q1	us-gaap	Dividends Common Stock DividendsCommonStock	57665000	USD
CY2022Q1	us-gaap	Stockholders Equity Including Portion Attributable To Noncontrolling Interest StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest	4739115000	USD
CY2020Q4	us-gaap	Stockholders Equity Including Portion Attributable To Noncontrolling Interest StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest	4935795000	USD
CY2021Q1	slg	Profit Loss Less Minority Interest In Net Income Loss Operating Partnerships ProfitLossLessMinorityInterestInNetIncomeLossOperatingPartnerships	-5225000	USD
CY2021Q1	us-gaap	Other Comprehensive Income Loss Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent	48350000	USD
CY2021Q1	us-gaap	Dividends Preferred Stock DividendsPreferredStock	3738000	USD
CY2021Q1	us-gaap	Stock Issued During Period Value Dividend Reinvestment Plan StockIssuedDuringPeriodValueDividendReinvestmentPlan	351000	USD
CY2021Q1	slg	Reallocationof Noncontrolling Interest In Operating Partnership Increase Decrease ReallocationofNoncontrollingInterestInOperatingPartnershipIncreaseDecrease	-26609000	USD
CY2021Q1	slg	Deferred Compensation Plan And Stock Award Net DeferredCompensationPlanAndStockAwardNet	6728000	USD
CY2021Q1	us-gaap	Treasury Stock Value Acquired Cost Method TreasuryStockValueAcquiredCostMethod	80310000	USD
CY2021Q1	slg	Consolidation Of Joint Venture Interest ConsolidationOfJointVentureInterest	171000	USD
CY2021Q1	us-gaap	Minority Interest Decrease From Distributions To Noncontrolling Interest Holders MinorityInterestDecreaseFromDistributionsToNoncontrollingInterestHolders	110000	USD
CY2021Q1	us-gaap	Stock Issued During Period Value Stock Dividend StockIssuedDuringPeriodValueStockDividend	123529000	USD
CY2021Q1	us-gaap	Common Stock Dividends Per Share Declared CommonStockDividendsPerShareDeclared	0.938
CY2021Q1	us-gaap	Dividends Common Stock DividendsCommonStock	63312000	USD
CY2021Q1	us-gaap	Stockholders Equity Including Portion Attributable To Noncontrolling Interest StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest	4935620000	USD
CY2022Q1	us-gaap	Profit Loss ProfitLoss	13485000	USD
CY2021Q1	us-gaap	Profit Loss ProfitLoss	-3855000	USD
CY2022Q1	us-gaap	Depreciation Depletion And Amortization DepreciationDepletionAndAmortization	48931000	USD
CY2021Q1	us-gaap	Depreciation Depletion And Amortization DepreciationDepletionAndAmortization	66770000	USD
CY2022Q1	us-gaap	Income Loss From Equity Method Investments IncomeLossFromEquityMethodInvestments	-4715000	USD
CY2021Q1	us-gaap	Income Loss From Equity Method Investments IncomeLossFromEquityMethodInvestments	-2864000	USD
CY2022Q1	us-gaap	Equity Method Investment Dividends Or Distributions EquityMethodInvestmentDividendsOrDistributions	188000	USD
CY2021Q1	us-gaap	Equity Method Investment Dividends Or Distributions EquityMethodInvestmentDividendsOrDistributions	69000	USD
CY2022Q1	us-gaap	Equity Method Investment Realized Gain Loss On Disposal EquityMethodInvestmentRealizedGainLossOnDisposal	0	USD
CY2021Q1	us-gaap	Equity Method Investment Realized Gain Loss On Disposal EquityMethodInvestmentRealizedGainLossOnDisposal	-12629000	USD
CY2022Q1	slg	Purchase Price Fair Value Adjustment Gain Loss PurchasePriceFairValueAdjustmentGainLoss	-63000	USD
CY2021Q1	slg	Purchase Price Fair Value Adjustment Gain Loss PurchasePriceFairValueAdjustmentGainLoss	2664000	USD
CY2022Q1	slg	Depreciable Real Estate Reserves Cash Flow Effect DepreciableRealEstateReservesCashFlowEffect	0	USD
CY2021Q1	slg	Depreciable Real Estate Reserves Cash Flow Effect DepreciableRealEstateReservesCashFlowEffect	-8241000	USD
CY2022Q1	us-gaap	Gains Losses On Sales Of Investment Real Estate GainsLossesOnSalesOfInvestmentRealEstate	-1002000	USD
CY2021Q1	us-gaap	Gains Losses On Sales Of Investment Real Estate GainsLossesOnSalesOfInvestmentRealEstate	-1388000	USD
CY2022Q1	us-gaap	Straight Line Rent StraightLineRent	546000	USD
CY2021Q1	us-gaap	Straight Line Rent StraightLineRent	2685000	USD
CY2022Q1	slg	Non Cash Lease Expense NonCashLeaseExpense	6043000	USD
CY2021Q1	slg	Non Cash Lease Expense NonCashLeaseExpense	3375000	USD
CY2022Q1	us-gaap	Other Noncash Income Expense OtherNoncashIncomeExpense	6964000	USD
CY2021Q1	us-gaap	Other Noncash Income Expense OtherNoncashIncomeExpense	-15564000	USD
CY2022Q1	us-gaap	Increase Decrease In Accounts Receivable IncreaseDecreaseInAccountsReceivable	-13673000	USD
CY2021Q1	us-gaap	Increase Decrease In Accounts Receivable IncreaseDecreaseInAccountsReceivable	4138000	USD
CY2022Q1	us-gaap	Increase Decrease In Due From Related Parties Current IncreaseDecreaseInDueFromRelatedPartiesCurrent	2335000	USD
CY2021Q1	us-gaap	Increase Decrease In Due From Related Parties Current IncreaseDecreaseInDueFromRelatedPartiesCurrent	683000	USD
CY2022Q1	us-gaap	Increase Decrease In Deferred Leasing Fees IncreaseDecreaseInDeferredLeasingFees	4240000	USD
CY2021Q1	us-gaap	Increase Decrease In Deferred Leasing Fees IncreaseDecreaseInDeferredLeasingFees	240000	USD
CY2022Q1	us-gaap	Increase Decrease In Other Operating Assets IncreaseDecreaseInOtherOperatingAssets	25076000	USD
CY2021Q1	us-gaap	Increase Decrease In Other Operating Assets IncreaseDecreaseInOtherOperatingAssets	24354000	USD
CY2022Q1	slg	Increase Decrease In Accrued Liabilities And Other IncreaseDecreaseInAccruedLiabilitiesAndOther	28049000	USD
CY2021Q1	slg	Increase Decrease In Accrued Liabilities And Other IncreaseDecreaseInAccruedLiabilitiesAndOther	-38640000	USD
CY2022Q1	us-gaap	Increase Decrease In Deferred Liabilities IncreaseDecreaseInDeferredLiabilities	3550000	USD
CY2021Q1	us-gaap	Increase Decrease In Deferred Liabilities IncreaseDecreaseInDeferredLiabilities	4121000	USD
CY2022Q1	us-gaap	Increase Decrease In Operating Lease Liability IncreaseDecreaseInOperatingLeaseLiability	864000	USD
CY2021Q1	us-gaap	Increase Decrease In Operating Lease Liability IncreaseDecreaseInOperatingLeaseLiability	-19160000	USD
CY2022Q1	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	81402000	USD
CY2021Q1	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	18602000	USD
CY2022Q1	slg	Payments To Acquire Land Buildings And Improvements PaymentsToAcquireLandBuildingsAndImprovements	61680000	USD
CY2021Q1	slg	Payments To Acquire Land Buildings And Improvements PaymentsToAcquireLandBuildingsAndImprovements	49328000	USD
CY2022Q1	slg	Payments For Acquisition Deposits And Deferred Purchase Price PaymentsForAcquisitionDepositsAndDeferredPurchasePrice	15000000	USD
CY2021Q1	slg	Payments For Acquisition Deposits And Deferred Purchase Price PaymentsForAcquisitionDepositsAndDeferredPurchasePrice	0	USD
CY2022Q1	us-gaap	Payments To Acquire Equity Method Investments PaymentsToAcquireEquityMethodInvestments	11399000	USD
CY2021Q1	us-gaap	Payments To Acquire Equity Method Investments PaymentsToAcquireEquityMethodInvestments	21027000	USD
CY2022Q1	us-gaap	Proceeds From Equity Method Investment Dividends Or Distributions Return Of Capital ProceedsFromEquityMethodInvestmentDividendsOrDistributionsReturnOfCapital	16089000	USD
CY2021Q1	us-gaap	Proceeds From Equity Method Investment Dividends Or Distributions Return Of Capital ProceedsFromEquityMethodInvestmentDividendsOrDistributionsReturnOfCapital	19692000	USD
CY2022Q1	us-gaap	Proceeds From Real Estate And Real Estate Joint Ventures ProceedsFromRealEstateAndRealEstateJointVentures	91994000	USD
CY2021Q1	us-gaap	Proceeds From Real Estate And Real Estate Joint Ventures ProceedsFromRealEstateAndRealEstateJointVentures	62800000	USD
CY2022Q1	slg	Proceeds From Consolidation Of Real Estate Investment ProceedsFromConsolidationOfRealEstateInvestment	0	USD
CY2021Q1	slg	Payments For Proceeds From Other Investments PaymentsForProceedsFromOtherInvestments	54000	USD
CY2022Q1	slg	Origination Of Debt And Preferred Equity Investments OriginationOfDebtAndPreferredEquityInvestments	13122000	USD
CY2021Q1	slg	Origination Of Debt And Preferred Equity Investments OriginationOfDebtAndPreferredEquityInvestments	5905000	USD
CY2021Q1	slg	Proceeds From Consolidation Of Real Estate Investment ProceedsFromConsolidationOfRealEstateInvestment	9475000	USD
CY2022Q1	us-gaap	Proceeds From Sale And Maturity Of Marketable Securities ProceedsFromSaleAndMaturityOfMarketableSecurities	0	USD
CY2021Q1	us-gaap	Proceeds From Sale And Maturity Of Marketable Securities ProceedsFromSaleAndMaturityOfMarketableSecurities	4528000	USD
CY2022Q1	slg	Payments For Proceeds From Other Investments PaymentsForProceedsFromOtherInvestments	-209000	USD
CY2022Q1	slg	Repayments Or Redemption Of Debt And Preferred Equity Investments RepaymentsOrRedemptionOfDebtAndPreferredEquityInvestments	6405000	USD
CY2021Q1	slg	Repayments Or Redemption Of Debt And Preferred Equity Investments RepaymentsOrRedemptionOfDebtAndPreferredEquityInvestments	0	USD
CY2022Q1	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	13496000	USD
CY2021Q1	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	20181000	USD
CY2022Q1	us-gaap	Proceeds From Issuance Of Secured Debt ProceedsFromIssuanceOfSecuredDebt	5309000	USD
CY2021Q1	us-gaap	Proceeds From Issuance Of Secured Debt ProceedsFromIssuanceOfSecuredDebt	10391000	USD
CY2022Q1	us-gaap	Repayments Of Secured Debt RepaymentsOfSecuredDebt	55715000	USD
CY2021Q1	us-gaap	Repayments Of Secured Debt RepaymentsOfSecuredDebt	362542000	USD
CY2022Q1	us-gaap	Proceeds From Issuance Of Unsecured Debt ProceedsFromIssuanceOfUnsecuredDebt	320000000	USD
CY2021Q1	us-gaap	Proceeds From Issuance Of Unsecured Debt ProceedsFromIssuanceOfUnsecuredDebt	530000000	USD
CY2022Q1	us-gaap	Repayments Of Unsecured Debt RepaymentsOfUnsecuredDebt	210000000	USD
CY2021Q1	us-gaap	Repayments Of Unsecured Debt RepaymentsOfUnsecuredDebt	10000000	USD
CY2022Q1	us-gaap	Proceeds From Stock Options Exercised ProceedsFromStockOptionsExercised	89000	USD
CY2021Q1	us-gaap	Proceeds From Stock Options Exercised ProceedsFromStockOptionsExercised	351000	USD
CY2022Q1	us-gaap	Payments For Repurchase Of Common Stock PaymentsForRepurchaseOfCommonStock	151197000	USD
CY2021Q1	us-gaap	Payments For Repurchase Of Common Stock PaymentsForRepurchaseOfCommonStock	84089000	USD
CY2022Q1	us-gaap	Payments For Repurchase Of Redeemable Preferred Stock PaymentsForRepurchaseOfRedeemablePreferredStock	17967000	USD
CY2021Q1	us-gaap	Payments For Repurchase Of Redeemable Preferred Stock PaymentsForRepurchaseOfRedeemablePreferredStock	3631000	USD
CY2022Q1	us-gaap	Payments For Repurchase Of Other Equity PaymentsForRepurchaseOfOtherEquity	18272000	USD
CY2021Q1	us-gaap	Payments For Repurchase Of Other Equity PaymentsForRepurchaseOfOtherEquity	13261000	USD
CY2022Q1	slg	Distributions To Noncontrolling Interests Other Partnerships DistributionsToNoncontrollingInterestsOtherPartnerships	123000	USD
CY2021Q1	slg	Distributions To Noncontrolling Interests Other Partnerships DistributionsToNoncontrollingInterestsOtherPartnerships	110000	USD
CY2022Q1	slg	Proceeds From Noncontrolling Interests In Other Partnerships ProceedsFromNoncontrollingInterestsInOtherPartnerships	0	USD
CY2021Q1	slg	Proceeds From Noncontrolling Interests In Other Partnerships ProceedsFromNoncontrollingInterestsInOtherPartnerships	171000	USD
CY2022Q1	slg	Distribution To Noncontrolling Interest Operating Partnership DistributionToNoncontrollingInterestOperatingPartnership	4415000	USD
CY2021Q1	slg	Distribution To Noncontrolling Interest Operating Partnership DistributionToNoncontrollingInterestOperatingPartnership	4148000	USD
CY2022Q1	us-gaap	Payments Of Dividends PaymentsOfDividends	66339000	USD
CY2021Q1	us-gaap	Payments Of Dividends PaymentsOfDividends	69772000	USD
CY2022Q1	slg	Proceeds From Other Obligation Related To Secured Borrowing ProceedsFromOtherObligationRelatedToSecuredBorrowing	77874000	USD
CY2021Q1	slg	Proceeds From Other Obligation Related To Secured Borrowing ProceedsFromOtherObligationRelatedToSecuredBorrowing	0	USD
CY2022Q1	us-gaap	Payments Related To Tax Withholding For Share Based Compensation PaymentsRelatedToTaxWithholdingForShareBasedCompensation	3888000	USD
CY2021Q1	us-gaap	Payments Related To Tax Withholding For Share Based Compensation PaymentsRelatedToTaxWithholdingForShareBasedCompensation	2788000	USD
CY2022Q1	slg	Proceeds From Payments Of Financing Costs ProceedsFromPaymentsOfFinancingCosts	-80000	USD
CY2021Q1	slg	Proceeds From Payments Of Financing Costs ProceedsFromPaymentsOfFinancingCosts	288000	USD
CY2022Q1	us-gaap	Finance Lease Principal Payments FinanceLeasePrincipalPayments	0	USD
CY2021Q1	us-gaap	Finance Lease Principal Payments FinanceLeasePrincipalPayments	255000	USD
CY2022Q1	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	-124564000	USD
CY2021Q1	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	-9971000	USD
CY2022Q1	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Period Increase Decrease Including Exchange Rate Effect CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect	-29666000	USD
CY2021Q1	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Period Increase Decrease Including Exchange Rate Effect CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect	28812000	USD
CY2021Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	336984000	USD
CY2020Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	372795000	USD
CY2022Q1	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	307318000	USD
CY2021Q1	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	401607000	USD
CY2022Q1	slg	Issuance Of Special Dividend Stock Dividend IssuanceOfSpecialDividendStockDividend	160620000	USD
CY2021Q1	slg	Issuance Of Special Dividend Stock Dividend IssuanceOfSpecialDividendStockDividend	123529000	USD
CY2022Q1	us-gaap	Capital Expenditures Incurred But Not Yet Paid CapitalExpendituresIncurredButNotYetPaid	8700000	USD
CY2021Q1	us-gaap	Capital Expenditures Incurred But Not Yet Paid CapitalExpendituresIncurredButNotYetPaid	15214000	USD
CY2022Q1	slg	Operating Partnership Noncontrolling Interest Fair Value Adjustment OperatingPartnershipNoncontrollingInterestFairValueAdjustment	43023000	USD
CY2021Q1	slg	Operating Partnership Noncontrolling Interest Fair Value Adjustment OperatingPartnershipNoncontrollingInterestFairValueAdjustment	26609000	USD
CY2022Q1	slg	Consolidation Of Real Estate Investment ConsolidationOfRealEstateInvestment	0	USD
CY2021Q1	slg	Consolidation Of Real Estate Investment ConsolidationOfRealEstateInvestment	119444000	USD
CY2022Q1	slg	Extinguishment Of Debt In Connection With Property Dispositions ExtinguishmentOfDebtInConnectionWithPropertyDispositions	0	USD
CY2021Q1	slg	Extinguishment Of Debt In Connection With Property Dispositions ExtinguishmentOfDebtInConnectionWithPropertyDispositions	53548000	USD
CY2022Q1	slg	Debt And Preferred Equity Reserves DebtAndPreferredEquityReserves	0	USD
CY2021Q1	slg	Debt And Preferred Equity Reserves DebtAndPreferredEquityReserves	10000000	USD
CY2022Q1	slg	Removalof Fully Depreciated Real Estate Assets RemovalofFullyDepreciatedRealEstateAssets	651000	USD
CY2021Q1	slg	Removalof Fully Depreciated Real Estate Assets RemovalofFullyDepreciatedRealEstateAssets	1120000	USD
CY2022Q1	slg	Share Repurchases Payable ShareRepurchasesPayable	0	USD
CY2021Q1	slg	Share Repurchases Payable ShareRepurchasesPayable	3779000	USD
CY2022Q1	us-gaap	Right Of Use Asset Obtained In Exchange For Operating Lease Liability RightOfUseAssetObtainedInExchangeForOperatingLeaseLiability	0	USD
CY2021Q1	us-gaap	Right Of Use Asset Obtained In Exchange For Operating Lease Liability RightOfUseAssetObtainedInExchangeForOperatingLeaseLiability	119711000	USD
CY2022Q1	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	223674000	USD
CY2021Q1	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	304999000	USD
CY2022Q1	us-gaap	Restricted Cash And Cash Equivalents RestrictedCashAndCashEquivalents	83644000	USD
CY2021Q1	us-gaap	Restricted Cash And Cash Equivalents RestrictedCashAndCashEquivalents	96608000	USD
CY2022Q1	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	307318000	USD
CY2021Q1	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	401607000	USD
CY2022Q1	slg	Volume Weighted Average Share Price VolumeWeightedAverageSharePrice	79.71
CY2022Q1	slg	Numberof Real Estate Buildings NumberofRealEstateBuildings	58	building
CY2022Q1	us-gaap	Area Of Real Estate Property AreaOfRealEstateProperty	27549252	sqft
CY2022Q1	slg	Real Estate Weighted Average Occupancy RealEstateWeightedAverageOccupancy	0.910
CY2022Q1	slg	Mortgage Loanson Real Estate Commercialand Consumer Net Including Debt Investments Other MortgageLoansonRealEstateCommercialandConsumerNetIncludingDebtInvestmentsOther	1100000000	USD
CY2022Q1	slg	Debt Investments Other DebtInvestmentsOther	100000000	USD
CY2022Q1	slg	Number Of Shares On Redemption Of One Unit Of Partnership Interest NumberOfSharesOnRedemptionOfOneUnitOfPartnershipInterest	1	shares
CY2022Q1	slg	Rental Revenue Increase Decrease Acquired Lease Amortization RentalRevenueIncreaseDecreaseAcquiredLeaseAmortization	-100000	USD
CY2021Q1	slg	Rental Revenue Increase Decrease Acquired Lease Amortization RentalRevenueIncreaseDecreaseAcquiredLeaseAmortization	-1900000	USD
CY2022Q1	us-gaap	Finite Lived Intangible Assets Gross FiniteLivedIntangibleAssetsGross	199722000	USD
CY2021Q4	us-gaap	Finite Lived Intangible Assets Gross FiniteLivedIntangibleAssetsGross	199722000	USD
CY2022Q1	us-gaap	Finite Lived Intangible Assets Accumulated Amortization FiniteLivedIntangibleAssetsAccumulatedAmortization	184129000	USD
CY2021Q4	us-gaap	Finite Lived Intangible Assets Accumulated Amortization FiniteLivedIntangibleAssetsAccumulatedAmortization	182643000	USD
CY2022Q1	us-gaap	Finite Lived Intangible Assets Net FiniteLivedIntangibleAssetsNet	15593000	USD
CY2021Q4	us-gaap	Finite Lived Intangible Assets Net FiniteLivedIntangibleAssetsNet	17079000	USD
CY2022Q1	slg	Net Intangible Liabilities Transferredto Liabilities Relatedto Assets Heldfor Sale NetIntangibleLiabilitiesTransferredtoLiabilitiesRelatedtoAssetsHeldforSale	0	USD
CY2022Q1	slg	Finite Lived Intangible Liabilities Gross FiniteLivedIntangibleLiabilitiesGross	212767000	USD
CY2021Q4	slg	Finite Lived Intangible Liabilities Gross FiniteLivedIntangibleLiabilitiesGross	212767000	USD
CY2022Q1	slg	Finite Lived Intangible Liabilities Accumulated Amortization FiniteLivedIntangibleLiabilitiesAccumulatedAmortization	210454000	USD
CY2021Q4	slg	Finite Lived Intangible Liabilities Accumulated Amortization FiniteLivedIntangibleLiabilitiesAccumulatedAmortization	210262000	USD
CY2022Q1	slg	Finite Lived Intangible Liabilities Net FiniteLivedIntangibleLiabilitiesNet	2313000	USD
CY2021Q4	slg	Finite Lived Intangible Liabilities Net FiniteLivedIntangibleLiabilitiesNet	2505000	USD
CY2022Q1	slg	Net Intangible Assets Transferredto Assets Heldfor Sale NetIntangibleAssetsTransferredtoAssetsHeldforSale	0	USD
CY2021Q4	slg	Net Intangible Assets Transferredto Assets Heldfor Sale NetIntangibleAssetsTransferredtoAssetsHeldforSale	1800000	USD
CY2021Q4	slg	Net Intangible Liabilities Transferredto Liabilities Relatedto Assets Heldfor Sale NetIntangibleLiabilitiesTransferredtoLiabilitiesRelatedtoAssetsHeldforSale	0	USD
CY2022Q1	us-gaap	Marketable Securities Unrealized Gain Loss MarketableSecuritiesUnrealizedGainLoss	-100000	USD
CY2022Q1	us-gaap	Proceeds From Sale Of Available For Sale Securities Debt ProceedsFromSaleOfAvailableForSaleSecuritiesDebt	0	USD
CY2021Q1	us-gaap	Proceeds From Sale Of Available For Sale Securities Debt ProceedsFromSaleOfAvailableForSaleSecuritiesDebt	5000000	USD
CY2022Q1	slg	Debt Securities Available For Sale Number Of Securities Sold DebtSecuritiesAvailableForSaleNumberOfSecuritiesSold	1	security
CY2022Q1	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	900000	USD
CY2021Q1	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	700000	USD
CY2022Q1	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>
CY2022Q1	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.
CY2022Q1	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>
CY2021Q4	us-gaap	Mortgage Loans On Real Estate MortgageLoansOnRealEstate	1088723000	USD
CY2020Q4	us-gaap	Mortgage Loans On Real Estate MortgageLoansOnRealEstate	1076542000	USD
CY2022Q1	us-gaap	Mortgage Loans On Real Estate Amortization Of Premium MortgageLoansOnRealEstateAmortizationOfPremium	6405000	USD
CY2021	us-gaap	Mortgage Loans On Real Estate Amortization Of Premium MortgageLoansOnRealEstateAmortizationOfPremium	201446000	USD
CY2022Q1	slg	Sec Schedule1229 Real Estate Companies Investment In Mortgage Loans On Real Estate Loan Loss Reserve Period Increase Decrease SECSchedule1229RealEstateCompaniesInvestmentInMortgageLoansOnRealEstateLoanLossReservePeriodIncreaseDecrease	0	USD
CY2021	slg	Sec Schedule1229 Real Estate Companies Investment In Mortgage Loans On Real Estate Loan Loss Reserve Period Increase Decrease SECSchedule1229RealEstateCompaniesInvestmentInMortgageLoansOnRealEstateLoanLossReservePeriodIncreaseDecrease	6583000	USD
CY2022Q1	us-gaap	Mortgage Loans On Real Estate MortgageLoansOnRealEstate	1107870000	USD
CY2021Q4	us-gaap	Mortgage Loans On Real Estate MortgageLoansOnRealEstate	1088723000	USD
CY2022Q1	us-gaap	Mortgage Loans On Real Estate Commercial And Consumer Net MortgageLoansOnRealEstateCommercialAndConsumerNet	1107870000	USD
CY2022Q1	slg	Mortgage Loanson Real Estate Senior Financing MortgageLoansonRealEstateSeniorFinancing	6663176000	USD
CY2021Q4	us-gaap	Allowance For Loan And Lease Losses Real Estate AllowanceForLoanAndLeaseLossesRealEstate	6630000	USD
CY2020Q4	us-gaap	Allowance For Loan And Lease Losses Real Estate AllowanceForLoanAndLeaseLossesRealEstate	13213000	USD
CY2022Q1	us-gaap	Financing Receivable Allowance For Credit Losses Write Offs FinancingReceivableAllowanceForCreditLossesWriteOffs	0	USD
CY2021	us-gaap	Financing Receivable Allowance For Credit Losses Write Offs FinancingReceivableAllowanceForCreditLossesWriteOffs	6583000	USD
CY2022Q1	us-gaap	Allowance For Loan And Lease Losses Real Estate AllowanceForLoanAndLeaseLossesRealEstate	6630000	USD
CY2021Q4	us-gaap	Allowance For Loan And Lease Losses Real Estate AllowanceForLoanAndLeaseLossesRealEstate	6630000	USD
CY2022Q1	slg	Financing Receivable Nonaccrual No Allowance Number FinancingReceivableNonaccrualNoAllowanceNumber	1	loan
CY2022Q1	us-gaap	Financing Receivable Nonaccrual No Allowance FinancingReceivableNonaccrualNoAllowance	225400000	USD
CY2021Q4	slg	Number Of Investments Nonperforming NumberOfInvestmentsNonperforming	2	investment
CY2022Q1	slg	Number Of Investments Nonperforming NumberOfInvestmentsNonperforming	2	investment
CY2022Q1	us-gaap	Notes Receivable Gross NotesReceivableGross	1107870000	USD
CY2021Q4	us-gaap	Notes Receivable Gross NotesReceivableGross	1088723000	USD
CY2022Q1	us-gaap	Financing Receivable Originated In Current Fiscal Year FinancingReceivableOriginatedInCurrentFiscalYear	0	USD
CY2022Q1	us-gaap	Financing Receivable Originated In Fiscal Year Before Latest Fiscal Year FinancingReceivableOriginatedInFiscalYearBeforeLatestFiscalYear	142264000	USD
CY2022Q1	us-gaap	Financing Receivable Originated Two Years Before Latest Fiscal Year FinancingReceivableOriginatedTwoYearsBeforeLatestFiscalYear	288212000	USD
CY2022Q1	us-gaap	Financing Receivable Originated Three Years Before Latest Fiscal Year FinancingReceivableOriginatedThreeYearsBeforeLatestFiscalYear	677394000	USD
CY2022Q1	us-gaap	Notes Receivable Gross NotesReceivableGross	1107870000	USD
	slg	Financing Receivable Portfolio Segments Number FinancingReceivablePortfolioSegmentsNumber	1	segment
CY2022Q1	slg	Financing Receivable Portfolio Segments Number FinancingReceivablePortfolioSegmentsNumber	1	segment
CY2022Q1	slg	Financing Receivable Recorded In Other Assets FinancingReceivableRecordedInOtherAssets	10400000	USD
CY2021Q4	slg	Financing Receivable Recorded In Other Assets FinancingReceivableRecordedInOtherAssets	10500000	USD
CY2022Q1	us-gaap	Provision For Loan Losses Expensed ProvisionForLoanLossesExpensed	0	USD
CY2022Q1	us-gaap	Provision For Loan Losses Expensed ProvisionForLoanLossesExpensed	0	USD
CY2022Q1	srt	Mortgage Loans On Real Estate Interest Rate MortgageLoansOnRealEstateInterestRate	0.0665
CY2022Q1	slg	Variable Interest Entity Not Primary Beneficiary Investment VariableInterestEntityNotPrimaryBeneficiaryInvestment	86200000	USD
CY2021Q4	slg	Variable Interest Entity Not Primary Beneficiary Investment VariableInterestEntityNotPrimaryBeneficiaryInvestment	85600000	USD
CY2021Q4	us-gaap	Equity Method Investments EquityMethodInvestments	2997934000	USD
CY2022Q1	us-gaap	Equity Method Investment Difference Between Carrying Amount And Underlying Equity EquityMethodInvestmentDifferenceBetweenCarryingAmountAndUnderlyingEquity	550400000	USD
CY2022Q1	us-gaap	Deferred Costs Leasing Gross DeferredCostsLeasingGross	404778000	USD
CY2021Q4	us-gaap	Deferred Costs Leasing Gross DeferredCostsLeasingGross	400419000	USD
CY2022Q1	slg	Accumulated Amortization Of Deferred Costs AccumulatedAmortizationOfDeferredCosts	282484000	USD
CY2021Q4	slg	Accumulated Amortization Of Deferred Costs AccumulatedAmortizationOfDeferredCosts	275924000	USD
CY2022Q1	us-gaap	Deferred Costs Current And Noncurrent DeferredCostsCurrentAndNoncurrent	122294000	USD
CY2021Q4	us-gaap	Deferred Costs Current And Noncurrent DeferredCostsCurrentAndNoncurrent	124495000	USD
CY2022Q1	slg	Secured Debt Bearing Fixed Interest Amount SecuredDebtBearingFixedInterestAmount	1070571000	USD
CY2021Q4	slg	Secured Debt Bearing Fixed Interest Amount SecuredDebtBearingFixedInterestAmount	1073409000	USD
CY2022Q1	slg	Secured Debt Bearing Variable Interest Amount SecuredDebtBearingVariableInterestAmount	313478000	USD
CY2021Q4	slg	Secured Debt Bearing Variable Interest Amount SecuredDebtBearingVariableInterestAmount	361051000	USD
CY2022Q1	slg	Secured Debt And Other Loans Payable SecuredDebtAndOtherLoansPayable	1384049000	USD
CY2021Q4	slg	Secured Debt And Other Loans Payable SecuredDebtAndOtherLoansPayable	1434460000	USD
CY2022Q1	slg	Mortgages Reclassed To Liabilities Related To Assets Held For Sale MortgagesReclassedToLiabilitiesRelatedToAssetsHeldForSale	34348000	USD
CY2021Q4	slg	Mortgages Reclassed To Liabilities Related To Assets Held For Sale MortgagesReclassedToLiabilitiesRelatedToAssetsHeldForSale	34537000	USD
CY2022Q1	slg	Secured Debt Gross SecuredDebtGross	1349701000	USD
CY2021Q4	slg	Secured Debt Gross SecuredDebtGross	1399923000	USD
CY2022Q1	slg	Secured Debt Deferred Finance Costs Net SecuredDebtDeferredFinanceCostsNet	4926000	USD
CY2021Q4	slg	Secured Debt Deferred Finance Costs Net SecuredDebtDeferredFinanceCostsNet	5537000	USD
CY2022Q1	us-gaap	Secured Debt SecuredDebt	1344775000	USD
CY2021Q4	us-gaap	Secured Debt SecuredDebt	1394386000	USD
CY2022Q1	us-gaap	Collateral Already Posted Aggregate Fair Value CollateralAlreadyPostedAggregateFairValue	1900000000	USD
CY2021Q4	us-gaap	Collateral Already Posted Aggregate Fair Value CollateralAlreadyPostedAggregateFairValue	2100000000	USD
CY2022Q1	us-gaap	Long Term Debt Maturities Repayments Of Principal Remainder Of Fiscal Year LongTermDebtMaturitiesRepaymentsOfPrincipalRemainderOfFiscalYear	1207223000	USD
CY2022Q1	us-gaap	Long Term Debt Maturities Repayments Of Principal In Next Twelve Months LongTermDebtMaturitiesRepaymentsOfPrincipalInNextTwelveMonths	56640000	USD
CY2022Q1	us-gaap	Long Term Debt Maturities Repayments Of Principal In Year Two LongTermDebtMaturitiesRepaymentsOfPrincipalInYearTwo	538077000	USD
CY2022Q1	us-gaap	Long Term Debt Maturities Repayments Of Principal In Year Three LongTermDebtMaturitiesRepaymentsOfPrincipalInYearThree	100873000	USD
CY2022Q1	us-gaap	Long Term Debt Maturities Repayments Of Principal In Year Four LongTermDebtMaturitiesRepaymentsOfPrincipalInYearFour	500904000	USD
CY2022Q1	slg	Long Term Debt Maturity After Year Four LongTermDebtMaturityAfterYearFour	1730332000	USD
CY2022Q1	slg	Long Term Debt Maturities Repayments Of Principal LongTermDebtMaturitiesRepaymentsOfPrincipal	4134049000	USD
CY2022Q1	us-gaap	Interest Expense InterestExpense	32052000	USD
CY2021Q1	us-gaap	Interest Expense InterestExpense	39868000	USD
CY2022Q1	slg	Finance Lease Interest Expense Before Capitalized Interest FinanceLeaseInterestExpenseBeforeCapitalizedInterest	1237000	USD
CY2021Q1	slg	Finance Lease Interest Expense Before Capitalized Interest FinanceLeaseInterestExpenseBeforeCapitalizedInterest	1492000	USD
CY2022Q1	us-gaap	Interest Costs Incurred Capitalized InterestCostsIncurredCapitalized	17941000	USD
CY2021Q1	us-gaap	Interest Costs Incurred Capitalized InterestCostsIncurredCapitalized	17583000	USD
CY2022Q1	us-gaap	Interest Income Operating InterestIncomeOperating	278000	USD
CY2021Q1	us-gaap	Interest Income Operating InterestIncomeOperating	389000	USD
CY2022Q1	us-gaap	Interest Income Expense Net InterestIncomeExpenseNet	-15070000	USD
CY2021Q1	us-gaap	Interest Income Expense Net InterestIncomeExpenseNet	-23388000	USD
CY2022Q1	us-gaap	Due From Joint Ventures DueFromJointVentures	31001000	USD
CY2021Q4	us-gaap	Due From Joint Ventures DueFromJointVentures	28204000	USD
CY2022Q1	us-gaap	Due From Other Related Parties DueFromOtherRelatedParties	710000	USD
CY2021Q4	us-gaap	Due From Other Related Parties DueFromOtherRelatedParties	1204000	USD
CY2022Q1	us-gaap	Due From Related Parties DueFromRelatedParties	31711000	USD
CY2021Q4	us-gaap	Due From Related Parties DueFromRelatedParties	29408000	USD
CY2022Q1	slg	Total Shares Authorized TotalSharesAuthorized	260000000	shares
CY2022Q1	slg	Total Par Or Stated Value Per Share TotalParOrStatedValuePerShare	0.01
CY2022Q1	us-gaap	Common Stock Shares Authorized CommonStockSharesAuthorized	160000000	shares
CY2022Q1	us-gaap	Common Stock Par Or Stated Value Per Share CommonStockParOrStatedValuePerShare	0.01
CY2022Q1	us-gaap	Excess Stock Shares Authorized ExcessStockSharesAuthorized	75000000	shares
CY2022Q1	slg	Excess Stock Par Or Stated Value Per Share ExcessStockParOrStatedValuePerShare	0.01
CY2022Q1	us-gaap	Preferred Stock Shares Authorized PreferredStockSharesAuthorized	25000000	shares
CY2022Q1	us-gaap	Preferred Stock Par Or Stated Value Per Share PreferredStockParOrStatedValuePerShare	0.01
CY2022Q1	us-gaap	Excess Stock Shares Issued ExcessStockSharesIssued	0	shares
CY2022Q1	slg	Volume Weighted Average Share Price VolumeWeightedAverageSharePrice	79.71
CY2017	us-gaap	Stock Repurchased During Period Shares StockRepurchasedDuringPeriodShares	7865206	shares
CY2017	us-gaap	Treasury Stock Acquired Average Cost Per Share TreasuryStockAcquiredAverageCostPerShare	107.81
CY2018	us-gaap	Stock Repurchased During Period Shares StockRepurchasedDuringPeriodShares	9187480	shares
CY2018	us-gaap	Treasury Stock Acquired Average Cost Per Share TreasuryStockAcquiredAverageCostPerShare	102.06
CY2019	us-gaap	Stock Repurchased During Period Shares StockRepurchasedDuringPeriodShares	4333260	shares
CY2019	us-gaap	Treasury Stock Acquired Average Cost Per Share TreasuryStockAcquiredAverageCostPerShare	88.69
CY2020	us-gaap	Stock Repurchased During Period Shares StockRepurchasedDuringPeriodShares	8276032	shares
CY2020	us-gaap	Treasury Stock Acquired Average Cost Per Share TreasuryStockAcquiredAverageCostPerShare	64.30
CY2021	us-gaap	Stock Repurchased During Period Shares StockRepurchasedDuringPeriodShares	4474649	shares
CY2021	us-gaap	Treasury Stock Acquired Average Cost Per Share TreasuryStockAcquiredAverageCostPerShare	75.44
CY2022Q1	us-gaap	Stock Repurchased During Period Shares StockRepurchasedDuringPeriodShares	1971092	shares
CY2022Q1	us-gaap	Treasury Stock Acquired Average Cost Per Share TreasuryStockAcquiredAverageCostPerShare	76.69
CY2022Q1	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	7751000	USD
CY2021Q1	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	-7464000	USD
CY2022Q1	us-gaap	Distributed Earnings DistributedEarnings	335000	USD
CY2021Q1	us-gaap	Distributed Earnings DistributedEarnings	364000	USD
CY2022Q1	slg	Net Income Loss Available To Common Stockholders After Distributed And Undistributed Earnings Allocation Basic NetIncomeLossAvailableToCommonStockholdersAfterDistributedAndUndistributedEarningsAllocationBasic	7416000	USD
CY2021Q1	slg	Net Income Loss Available To Common Stockholders After Distributed And Undistributed Earnings Allocation Basic NetIncomeLossAvailableToCommonStockholdersAfterDistributedAndUndistributedEarningsAllocationBasic	-7828000	USD
CY2022Q1	us-gaap	Undistributed Earnings Loss Allocated To Participating Securities Diluted UndistributedEarningsLossAllocatedToParticipatingSecuritiesDiluted	96000	USD
CY2021Q1	us-gaap	Undistributed Earnings Loss Allocated To Participating Securities Diluted UndistributedEarningsLossAllocatedToParticipatingSecuritiesDiluted	-7000	USD
CY2022Q1	us-gaap	Dilutive Securities Effect On Basic Earnings Per Share Other DilutiveSecuritiesEffectOnBasicEarningsPerShareOther	492000	USD
CY2021Q1	us-gaap	Dilutive Securities Effect On Basic Earnings Per Share Other DilutiveSecuritiesEffectOnBasicEarningsPerShareOther	-476000	USD
CY2022Q1	us-gaap	Net Income Loss Available To Common Stockholders Diluted NetIncomeLossAvailableToCommonStockholdersDiluted	7812000	USD
CY2021Q1	us-gaap	Net Income Loss Available To Common Stockholders Diluted NetIncomeLossAvailableToCommonStockholdersDiluted	-8297000	USD
CY2022Q1	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	64349000	shares
CY2021Q1	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	66961000	shares
CY2022Q1	slg	Incremental Common Shares Attributable To Redemption Of Units To Common Shares IncrementalCommonSharesAttributableToRedemptionOfUnitsToCommonShares	4121000	shares
CY2021Q1	slg	Incremental Common Shares Attributable To Redemption Of Units To Common Shares IncrementalCommonSharesAttributableToRedemptionOfUnitsToCommonShares	4148000	shares
CY2022Q1	us-gaap	Incremental Common Shares Attributable To Share Based Payment Arrangements IncrementalCommonSharesAttributableToShareBasedPaymentArrangements	984000	shares
CY2021Q1	us-gaap	Incremental Common Shares Attributable To Share Based Payment Arrangements IncrementalCommonSharesAttributableToShareBasedPaymentArrangements	588000	shares
CY2022Q1	us-gaap	Incremental Common Shares Attributable To Nonvested Shares With Forfeitable Dividends IncrementalCommonSharesAttributableToNonvestedSharesWithForfeitableDividends	774000	shares
CY2021Q1	us-gaap	Incremental Common Shares Attributable To Nonvested Shares With Forfeitable Dividends IncrementalCommonSharesAttributableToNonvestedSharesWithForfeitableDividends	307000	shares
CY2022Q1	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	70228000	shares
CY2021Q1	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	72004000	shares
CY2022Q1	us-gaap	Antidilutive Securities Excluded From Computation Of Earnings Per Share Amount AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount	351927	shares
CY2021Q1	us-gaap	Antidilutive Securities Excluded From Computation Of Earnings Per Share Amount AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount	1124920	shares
CY2021Q1	us-gaap	Antidilutive Securities Excluded From Computation Of Earnings Per Share Amount AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount	1124920	shares
CY2022Q1	us-gaap	Employee Service Share Based Compensation Allocation Of Recognized Period Costs Capitalized Amount EmployeeServiceShareBasedCompensationAllocationOfRecognizedPeriodCostsCapitalizedAmount	300000	USD
CY2021Q1	us-gaap	Employee Service Share Based Compensation Allocation Of Recognized Period Costs Capitalized Amount EmployeeServiceShareBasedCompensationAllocationOfRecognizedPeriodCostsCapitalizedAmount	500000	USD
CY2022Q1	us-gaap	Other Comprehensive Income Loss Before Reclassifications Net Of Tax OtherComprehensiveIncomeLossBeforeReclassificationsNetOfTax	34884000	USD
CY2022Q1	us-gaap	Reclassification From Accumulated Other Comprehensive Income Current Period Net Of Tax ReclassificationFromAccumulatedOtherComprehensiveIncomeCurrentPeriodNetOfTax	-4613000	USD
CY2022Q1	slg	Other Comprehensive Income Loss Deferred Net Lossfrom Terminated Hedges OtherComprehensiveIncomeLossDeferredNetLossfromTerminatedHedges	-600000	USD
CY2021Q4	slg	Other Comprehensive Income Loss Deferred Net Lossfrom Terminated Hedges OtherComprehensiveIncomeLossDeferredNetLossfromTerminatedHedges	-600000	USD
CY2021Q4	us-gaap	Derivative Fair Value Of Derivative Asset DerivativeFairValueOfDerivativeAsset	1896000	USD
CY2022Q1	us-gaap	Available For Sale Securities Debt Securities AvailableForSaleSecuritiesDebtSecurities	22353000	USD
CY2022Q1	us-gaap	Derivative Fair Value Of Derivative Asset DerivativeFairValueOfDerivativeAsset	10052000	USD
CY2021Q4	us-gaap	Available For Sale Securities Debt Securities AvailableForSaleSecuritiesDebtSecurities	24146000	USD
CY2021Q1	slg	Accumulated Other Comprehensive Income Loss Gain Lossfrom Changesin Fair Value AccumulatedOtherComprehensiveIncomeLossGainLossfromChangesinFairValue	0	USD
CY2022Q1	slg	Accumulated Other Comprehensive Income Loss Gain Lossfrom Changesin Fair Value AccumulatedOtherComprehensiveIncomeLossGainLossfromChangesinFairValue	0	USD
CY2022Q1	us-gaap	Derivative Net Liability Position Aggregate Fair Value DerivativeNetLiabilityPositionAggregateFairValue	6800000	USD
CY2022Q1	us-gaap	Assets Needed For Immediate Settlement Aggregate Fair Value AssetsNeededForImmediateSettlementAggregateFairValue	7000000	USD
CY2022Q1	us-gaap	Cash Flow Hedge Gain Loss To Be Reclassified Within Twelve Months CashFlowHedgeGainLossToBeReclassifiedWithinTwelveMonths	-3700000	USD
CY2022Q1	slg	Cash Flow Hedge Gain Loss To Be Reclassified Within Twelve Months Into Equity In Net Income CashFlowHedgeGainLossToBeReclassifiedWithinTwelveMonthsIntoEquityInNetIncome	1300000	USD
CY2022Q1	us-gaap	Other Comprehensive Income Loss Cash Flow Hedge Gain Loss Before Reclassification And Tax OtherComprehensiveIncomeLossCashFlowHedgeGainLossBeforeReclassificationAndTax	38686000	USD
CY2021Q1	us-gaap	Other Comprehensive Income Loss Cash Flow Hedge Gain Loss Before Reclassification And Tax OtherComprehensiveIncomeLossCashFlowHedgeGainLossBeforeReclassificationAndTax	45175000	USD
CY2022Q1	us-gaap	Interest Rate Cash Flow Hedge Gain Loss Reclassified To Earnings Net InterestRateCashFlowHedgeGainLossReclassifiedToEarningsNet	4881000	USD
CY2021Q1	us-gaap	Interest Rate Cash Flow Hedge Gain Loss Reclassified To Earnings Net InterestRateCashFlowHedgeGainLossReclassifiedToEarningsNet	6088000	USD
CY2022Q1	us-gaap	Operating Lease Lease Income Lease Payments OperatingLeaseLeaseIncomeLeasePayments	136581000	USD
CY2021Q1	us-gaap	Operating Lease Lease Income Lease Payments OperatingLeaseLeaseIncomeLeasePayments	164679000	USD
CY2022Q1	us-gaap	Operating Lease Variable Lease Income OperatingLeaseVariableLeaseIncome	19555000	USD
CY2021Q1	us-gaap	Operating Lease Variable Lease Income OperatingLeaseVariableLeaseIncome	25279000	USD
CY2022Q1	slg	Operating Lease Lease Income Fixed And Variable Lease Payments OperatingLeaseLeaseIncomeFixedAndVariableLeasePayments	156136000	USD
CY2021Q1	slg	Operating Lease Lease Income Fixed And Variable Lease Payments OperatingLeaseLeaseIncomeFixedAndVariableLeasePayments	189958000	USD
CY2022Q1	us-gaap	Amortization Of Above And Below Market Leases AmortizationOfAboveAndBelowMarketLeases	-105000	USD
CY2021Q1	us-gaap	Amortization Of Above And Below Market Leases AmortizationOfAboveAndBelowMarketLeases	-1869000	USD
CY2022Q1	us-gaap	Operating Lease Lease Income OperatingLeaseLeaseIncome	156031000	USD
CY2021Q1	us-gaap	Operating Lease Lease Income OperatingLeaseLeaseIncome	188089000	USD
CY2022Q1	us-gaap	Sublease Income SubleaseIncome	56200000	USD
CY2021Q1	us-gaap	Sublease Income SubleaseIncome	65800000	USD
CY2022Q1	us-gaap	Sales Type Lease Interest Income SalesTypeLeaseInterestIncome	1092000	USD
CY2021Q1	us-gaap	Sales Type Lease Interest Income SalesTypeLeaseInterestIncome	1101000	USD
CY2022Q1	us-gaap	Number Of Reportable Segments NumberOfReportableSegments	2	segment
CY2022Q1	us-gaap	Revenues Revenues	187964000	USD
CY2021Q1	us-gaap	Revenues Revenues	226102000	USD
CY2022Q1	slg	Income Loss From Continuing Operations Before Realized Gain Loss On Disposal Of Equity Method Investment IncomeLossFromContinuingOperationsBeforeRealizedGainLossOnDisposalOfEquityMethodInvestment	13485000	USD
CY2021Q1	slg	Income Loss From Continuing Operations Before Realized Gain Loss On Disposal Of Equity Method Investment IncomeLossFromContinuingOperationsBeforeRealizedGainLossOnDisposalOfEquityMethodInvestment	-3855000	USD
CY2022Q1	us-gaap	Assets Assets	11014965000	USD
CY2021Q4	us-gaap	Assets Assets	11066629000	USD
CY2022Q1	us-gaap	Selling General And Administrative Expense SellingGeneralAndAdministrativeExpense	24800000	USD
CY2021Q1	us-gaap	Selling General And Administrative Expense SellingGeneralAndAdministrativeExpense	22900000	USD

Files In Submission

Name	View Source	Status
0001040971-22-000026-index-headers.html	Edgar Link	pending
0001040971-22-000026-index.html	Edgar Link	pending
0001040971-22-000026.txt	Edgar Link	pending
0001040971-22-000026-xbrl.zip	Edgar Link	pending
a22q110qex311.htm	Edgar Link	pending
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FilingSummary.xml	Edgar Link	unprocessable
Financial_Report.xlsx	Edgar Link	pending
MetaLinks.json	Edgar Link	pending
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report.css	Edgar Link	pending
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slg-20220331.htm	Edgar Link	pending
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slg-20220331_cal.xml	Edgar Link	unprocessable
slg-20220331_def.xml	Edgar Link	unprocessable
slg-20220331_htm.xml	Edgar Link	completed
slg-20220331_lab.xml	Edgar Link	unprocessable
slg-20220331_pre.xml	Edgar Link	unprocessable

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$SLG
SL Green Realty Corp Stock $slg

2022 Q1 Form 10-Q Financial Statement

#000104097122000026 Filed on May 09, 2022

Income Statement

Balance Sheet

Cashflow Statement

Facts In Submission

Files In Submission

$SLG SL Green Realty Corp Stock $slg

2022 Q1 Form 10-Q Financial Statement

#000104097122000026 Filed on May 09, 2022

Income Statement

Balance Sheet

Cashflow Statement

Facts In Submission

Files In Submission

$SLG
SL Green Realty Corp Stock $slg