$SLG
SL Green Realty Corp Stock $slg

$slg Overview Financials Valuation SEC Filings Company Website

2020 Q1 Form 10-Q Financial Statement

#000104097120000016 Filed on May 11, 2020

Income Statement

Concept	2020 Q1	2019 Q1
Revenue	$314.3M	$304.3M
YoY Change	3.3%	0.85%
Cost Of Revenue	$107.9M	$112.7M
YoY Change	-4.26%	-0.97%
Gross Profit	$206.4M	$191.6M
YoY Change	7.72%	1.97%
Gross Profit Margin	65.67%	62.97%
Selling, General & Admin	$19.60M	$26.00M
YoY Change	-24.62%	10.51%
% of Gross Profit	9.5%	13.57%
Research & Development
YoY Change
% of Gross Profit
Depreciation & Amortization	$70.78M	$71.09M
YoY Change	-0.43%	-2.52%
% of Gross Profit	34.29%	37.1%
Operating Expenses	$19.60M	$26.00M
YoY Change	-24.62%	10.51%
Operating Profit	$186.8M	$165.6M
YoY Change	12.8%	0.75%
Interest Expense	$56.81M	$60.81M
YoY Change	-6.57%	12.34%
% of Operating Profit	30.41%	36.72%
Other Income/Expense, Net
YoY Change
Pretax Income	$127.1M	$52.80M
YoY Change	140.72%	21.62%
Income Tax	$1.100M	$800.0K
% Of Pretax Income	0.87%	1.52%
Net Earnings	$118.5M	$47.53M
YoY Change	149.4%	-54.95%
Net Earnings / Revenue	37.71%	15.62%
Basic Earnings Per Share	$1.51	$0.52
Diluted Earnings Per Share	$1.51	$0.52
COMMON SHARES
Basic Shares Outstanding	75.66M shares	83.31M shares
Diluted Shares Outstanding	80.35M shares	87.81M shares

Balance Sheet

Concept	2020 Q1	2019 Q1
SHORT-TERM ASSETS
Cash & Short-Term Investments	$579.5M	$173.7M
YoY Change	233.59%	-45.21%
Cash & Equivalents	$554.2M	$144.3M
Short-Term Investments	$25.35M	$29.41M
Other Short-Term Assets
YoY Change
Inventory	$0.00
Prepaid Expenses
Receivables	$425.0M	$414.0M
Other Receivables	$0.00	$0.00
Total Short-Term Assets	$979.0M	$558.0M
YoY Change	75.45%	-26.39%
LONG-TERM ASSETS
Property, Plant & Equipment	$6.932B	$6.782B
YoY Change	2.21%	-0.69%
Goodwill
YoY Change
Intangibles
YoY Change
Long-Term Investments	$2.848B	$3.055B
YoY Change	-6.78%	0.68%
Other Assets	$299.0M	$363.0M
YoY Change	-17.63%	27.37%
Total Long-Term Assets	$12.24B	$12.83B
YoY Change	-4.57%	1.62%
TOTAL ASSETS
Total Short-Term Assets	$979.0M	$558.0M
Total Long-Term Assets	$12.24B	$12.83B
Total Assets	$13.22B	$13.39B
YoY Change	-1.23%	0.04%
SHORT-TERM LIABILITIES
YoY Change
Accounts Payable	$159.0M	$112.0M
YoY Change	41.96%	-15.15%
Accrued Expenses	$390.0M	$419.0M
YoY Change	-6.92%	1032.43%
Deferred Revenue
YoY Change
Short-Term Debt	$0.00	$0.00
YoY Change
Long-Term Debt Due
YoY Change
Total Short-Term Liabilities	$635.0M	$672.0M
YoY Change	-5.51%	110.66%
LONG-TERM LIABILITIES
Long-Term Debt	$6.286B	$5.934B
YoY Change	5.93%	8.58%
Other Long-Term Liabilities	$331.0M	$238.0M
YoY Change	39.08%	-15.6%
Total Long-Term Liabilities	$6.617B	$6.172B
YoY Change	7.21%	7.4%
TOTAL LIABILITIES
Total Short-Term Liabilities	$635.0M	$672.0M
Total Long-Term Liabilities	$6.617B	$6.172B
Total Liabilities	$7.252B	$6.844B
YoY Change	5.96%	12.83%
SHAREHOLDERS EQUITY
Retained Earnings	$1.099B	$1.210B
YoY Change	-9.18%	-23.57%
Common Stock	$776.0K	$843.0K
YoY Change	-7.95%	-6.54%
Preferred Stock
YoY Change
Treasury Stock (at cost)	$124.0M	$124.0M
YoY Change	0.0%	0.0%
Treasury Stock Shares	1.055M shares	1.055M shares
Shareholders Equity	$5.263B	$5.798B
YoY Change
Total Liabilities & Shareholders Equity	$13.22B	$13.39B
YoY Change	-1.23%	0.04%

Cashflow Statement

Concept	2020 Q1	2019 Q1
OPERATING ACTIVITIES
Net Income	$118.5M	$47.53M
YoY Change	149.4%	-54.95%
Depreciation, Depletion And Amortization	$70.78M	$71.09M
YoY Change	-0.43%	-2.52%
Cash From Operating Activities	$42.03M	$62.31M
YoY Change	-32.56%	-34.09%
INVESTING ACTIVITIES
Capital Expenditures	-$188.6M	-$39.50M
YoY Change	377.47%	-25.33%
Acquisitions
YoY Change
Other Investing Activities	$59.20M	-$252.3M
YoY Change	-123.46%	-149.58%
Cash From Investing Activities	-$129.4M	-$291.8M
YoY Change	-55.65%	-164.0%
FINANCING ACTIVITIES
Cash Dividend Paid	$79.66M	$77.40M
YoY Change	2.92%	-5.3%
Common Stock Issuance & Retirement, Net	$219.6M	$34.24M
YoY Change	541.23%	-91.05%
Debt Paid & Issued, Net
YoY Change
Cash From Financing Activities	$467.0M	$246.1M
YoY Change	89.73%	-158.28%
NET CHANGE
Cash From Operating Activities	$42.03M	$62.31M
Cash From Investing Activities	-$129.4M	-$291.8M
Cash From Financing Activities	$467.0M	$246.1M
Net Change In Cash	$379.6M	$16.60M
YoY Change	2186.97%	-87.06%
FREE CASH FLOW
Cash From Operating Activities	$42.03M	$62.31M
Capital Expenditures	-$188.6M	-$39.50M
Free Cash Flow	$230.6M	$101.8M
YoY Change	126.52%	-30.95%

Facts In Submission

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CY2020Q1	us-gaap	Noncontrolling Interest In Net Income Loss Other Noncontrolling Interests Redeemable NoncontrollingInterestInNetIncomeLossOtherNoncontrollingInterestsRedeemable	-293000	USD
CY2019Q1	us-gaap	Noncontrolling Interest In Net Income Loss Other Noncontrolling Interests Redeemable NoncontrollingInterestInNetIncomeLossOtherNoncontrollingInterestsRedeemable	237000	USD
CY2020Q1	us-gaap	Noncontrolling Interest In Net Income Loss Preferred Unit Holders Redeemable NoncontrollingInterestInNetIncomeLossPreferredUnitHoldersRedeemable	2666000	USD
CY2019Q1	us-gaap	Noncontrolling Interest In Net Income Loss Preferred Unit Holders Redeemable NoncontrollingInterestInNetIncomeLossPreferredUnitHoldersRedeemable	2724000	USD
CY2020Q1	us-gaap	Net Income Loss NetIncomeLoss	118539000	USD
CY2019Q1	us-gaap	Net Income Loss NetIncomeLoss	47530000	USD
CY2020Q1	us-gaap	Dividends Preferred Stock DividendsPreferredStock	3738000	USD
CY2019Q1	us-gaap	Dividends Preferred Stock DividendsPreferredStock	3738000	USD
CY2020Q1	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	114801000	USD
CY2019Q1	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	43792000	USD
CY2020Q1	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	1.47
CY2019Q1	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.52
CY2020Q1	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	1.47
CY2019Q1	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.52
CY2019Q1	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	83313000	shares
CY2020Q1	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	82567000	shares
CY2019Q1	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	87810000	shares
CY2020Q1	us-gaap	Profit Loss ProfitLoss	127114000	USD
CY2019Q1	us-gaap	Profit Loss ProfitLoss	52769000	USD
CY2020Q1	us-gaap	Other Comprehensive Income Loss Cash Flow Hedge Gain Loss After Reclassification And Tax OtherComprehensiveIncomeLossCashFlowHedgeGainLossAfterReclassificationAndTax	-50735000	USD
CY2019Q1	us-gaap	Other Comprehensive Income Loss Cash Flow Hedge Gain Loss After Reclassification And Tax OtherComprehensiveIncomeLossCashFlowHedgeGainLossAfterReclassificationAndTax	-20884000	USD
CY2020Q1	us-gaap	Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Net Of Tax OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodNetOfTax	-4534000	USD
CY2019Q1	us-gaap	Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Net Of Tax OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodNetOfTax	768000	USD
CY2020Q1	us-gaap	Other Comprehensive Income Loss Net Of Tax OtherComprehensiveIncomeLossNetOfTax	-55269000	USD
CY2019Q1	us-gaap	Other Comprehensive Income Loss Net Of Tax OtherComprehensiveIncomeLossNetOfTax	-20116000	USD
CY2020Q1	us-gaap	Comprehensive Income Net Of Tax Including Portion Attributable To Noncontrolling Interest ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest	71845000	USD
CY2019Q1	us-gaap	Comprehensive Income Net Of Tax Including Portion Attributable To Noncontrolling Interest ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest	32653000	USD
CY2020Q1	us-gaap	Net Income Loss Attributable To Noncontrolling Interest NetIncomeLossAttributableToNoncontrollingInterest	8575000	USD
CY2019Q1	us-gaap	Net Income Loss Attributable To Noncontrolling Interest NetIncomeLossAttributableToNoncontrollingInterest	5239000	USD
CY2020Q1	us-gaap	Other Comprehensive Income Loss Net Of Tax Portion Attributable To Noncontrolling Interest OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToNoncontrollingInterest	-2886000	USD
CY2019Q1	us-gaap	Other Comprehensive Income Loss Net Of Tax Portion Attributable To Noncontrolling Interest OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToNoncontrollingInterest	-1003000	USD
CY2020Q1	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	66156000	USD
CY2019Q1	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	28417000	USD
CY2019Q4	us-gaap	Stockholders Equity Including Portion Attributable To Noncontrolling Interest StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest	5517198000	USD
CY2020Q1	slg	Profit Loss Less Minority Interest In Net Income Loss Operating Partnerships ProfitLossLessMinorityInterestInNetIncomeLossOperatingPartnerships	118246000	USD
CY2020Q1	us-gaap	Minority Interest Decrease From Redemptions MinorityInterestDecreaseFromRedemptions	1536000	USD
CY2020Q1	us-gaap	Other Comprehensive Income Loss Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent	-52383000	USD
CY2020Q1	us-gaap	Dividends Preferred Stock DividendsPreferredStock	3738000	USD
CY2020Q1	us-gaap	Stock Issued During Period Value Dividend Reinvestment Plan StockIssuedDuringPeriodValueDividendReinvestmentPlan	166000	USD
CY2020Q1	us-gaap	Stock Issued During Period Value Conversion Of Units StockIssuedDuringPeriodValueConversionOfUnits	84000	USD
CY2020Q1	slg	Reallocationof Noncontrolling Interest In Operating Partnership Increase Decrease ReallocationofNoncontrollingInterestInOperatingPartnershipIncreaseDecrease	38529000	USD
CY2020Q1	slg	Deferred Compensation Plan And Stock Award Net DeferredCompensationPlanAndStockAwardNet	5502000	USD
CY2020Q1	us-gaap	Treasury Stock Value Acquired Cost Method TreasuryStockValueAcquiredCostMethod	219576000	USD
CY2020Q1	slg	Consolidation Of Joint Venture Interest ConsolidationOfJointVentureInterest	3814000	USD
CY2020Q1	us-gaap	Minority Interest Decrease From Distributions To Noncontrolling Interest Holders MinorityInterestDecreaseFromDistributionsToNoncontrollingInterestHolders	492000	USD
CY2020Q1	us-gaap	Dividends Common Stock DividendsCommonStock	22665000	USD
CY2020Q1	us-gaap	Depreciation Depletion And Amortization DepreciationDepletionAndAmortization	70779000	USD
CY2019Q1	us-gaap	Depreciation Depletion And Amortization DepreciationDepletionAndAmortization	71085000	USD
CY2020Q1	us-gaap	Stockholders Equity Including Portion Attributable To Noncontrolling Interest StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest	5343965000	USD
CY2018Q4	us-gaap	Stockholders Equity Including Portion Attributable To Noncontrolling Interest StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest	5947855000	USD
CY2019Q1	slg	Profit Loss Less Minority Interest In Net Income Loss Operating Partnerships ProfitLossLessMinorityInterestInNetIncomeLossOperatingPartnerships	47767000	USD
CY2019Q1	us-gaap	Other Comprehensive Income Loss Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent	-19113000	USD
CY2019Q1	us-gaap	Dividends Preferred Stock DividendsPreferredStock	3738000	USD
CY2019Q1	us-gaap	Stock Issued During Period Value Dividend Reinvestment Plan StockIssuedDuringPeriodValueDividendReinvestmentPlan	47000	USD
CY2019Q1	us-gaap	Stock Issued During Period Value Conversion Of Units StockIssuedDuringPeriodValueConversionOfUnits	446000	USD
CY2019Q1	slg	Reallocationof Noncontrolling Interest In Operating Partnership Increase Decrease ReallocationofNoncontrollingInterestInOperatingPartnershipIncreaseDecrease	-28932000	USD
CY2019Q1	slg	Deferred Compensation Plan And Stock Award Net DeferredCompensationPlanAndStockAwardNet	4835000	USD
CY2019Q1	us-gaap	Treasury Stock Value Acquired Cost Method TreasuryStockValueAcquiredCostMethod	34243000	USD
CY2019Q1	slg	Consolidation Of Joint Venture Interest ConsolidationOfJointVentureInterest	161000	USD
CY2019Q1	us-gaap	Minority Interest Decrease From Distributions To Noncontrolling Interest Holders MinorityInterestDecreaseFromDistributionsToNoncontrollingInterestHolders	208000	USD
CY2019Q1	us-gaap	Dividends Common Stock DividendsCommonStock	70554000	USD
CY2019Q1	us-gaap	Stockholders Equity Including Portion Attributable To Noncontrolling Interest StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest	5844323000	USD
CY2020Q1	us-gaap	Profit Loss ProfitLoss	127114000	USD
CY2019Q1	us-gaap	Profit Loss ProfitLoss	52769000	USD
CY2020Q1	us-gaap	Income Loss From Equity Method Investments IncomeLossFromEquityMethodInvestments	-12814000	USD
CY2019Q1	us-gaap	Income Loss From Equity Method Investments IncomeLossFromEquityMethodInvestments	-5234000	USD
CY2020Q1	us-gaap	Equity Method Investment Dividends Or Distributions EquityMethodInvestmentDividendsOrDistributions	108000	USD
CY2019Q1	us-gaap	Equity Method Investment Dividends Or Distributions EquityMethodInvestmentDividendsOrDistributions	425000	USD
CY2020Q1	us-gaap	Equity Method Investment Realized Gain Loss On Disposal EquityMethodInvestmentRealizedGainLossOnDisposal	0	USD
CY2019Q1	us-gaap	Equity Method Investment Realized Gain Loss On Disposal EquityMethodInvestmentRealizedGainLossOnDisposal	17166000	USD
CY2020Q1	slg	Purchase Price Fair Value Adjustment Gain Loss PurchasePriceFairValueAdjustmentGainLoss	0	USD
CY2019Q1	slg	Purchase Price Fair Value Adjustment Gain Loss PurchasePriceFairValueAdjustmentGainLoss	-2041000	USD
CY2020Q1	us-gaap	Gains Losses On Sales Of Investment Real Estate GainsLossesOnSalesOfInvestmentRealEstate	72636000	USD
CY2019Q1	us-gaap	Gains Losses On Sales Of Investment Real Estate GainsLossesOnSalesOfInvestmentRealEstate	-1049000	USD
CY2020Q1	us-gaap	Provision For Loan Lease And Other Losses ProvisionForLoanLeaseAndOtherLosses	11248000	USD
CY2019Q1	us-gaap	Provision For Loan Lease And Other Losses ProvisionForLoanLeaseAndOtherLosses	0	USD
CY2020Q1	us-gaap	Straight Line Rent StraightLineRent	-3717000	USD
CY2019Q1	us-gaap	Straight Line Rent StraightLineRent	1114000	USD
CY2020Q1	slg	Non Cash Lease Expense NonCashLeaseExpense	3390000	USD
CY2019Q1	slg	Non Cash Lease Expense NonCashLeaseExpense	3381000	USD
CY2020Q1	us-gaap	Other Noncash Income Expense OtherNoncashIncomeExpense	-1110000	USD
CY2019Q1	us-gaap	Other Noncash Income Expense OtherNoncashIncomeExpense	-9027000	USD
CY2020Q1	us-gaap	Increase Decrease In Accounts Receivable IncreaseDecreaseInAccountsReceivable	44960000	USD
CY2019Q1	us-gaap	Increase Decrease In Accounts Receivable IncreaseDecreaseInAccountsReceivable	4759000	USD
CY2020Q1	us-gaap	Increase Decrease In Due From Related Parties Current IncreaseDecreaseInDueFromRelatedPartiesCurrent	4711000	USD
CY2019Q1	us-gaap	Increase Decrease In Due From Related Parties Current IncreaseDecreaseInDueFromRelatedPartiesCurrent	1270000	USD
CY2020Q1	us-gaap	Increase Decrease In Deferred Leasing Fees IncreaseDecreaseInDeferredLeasingFees	8603000	USD
CY2019Q1	us-gaap	Increase Decrease In Deferred Leasing Fees IncreaseDecreaseInDeferredLeasingFees	13111000	USD
CY2020Q1	us-gaap	Increase Decrease In Other Operating Assets IncreaseDecreaseInOtherOperatingAssets	48130000	USD
CY2019Q1	us-gaap	Increase Decrease In Other Operating Assets IncreaseDecreaseInOtherOperatingAssets	40218000	USD
CY2020Q1	slg	Increase Decrease In Accrued Liabilities And Other IncreaseDecreaseInAccruedLiabilitiesAndOther	-13877000	USD
CY2019Q1	slg	Increase Decrease In Accrued Liabilities And Other IncreaseDecreaseInAccruedLiabilitiesAndOther	-12915000	USD
CY2020Q1	us-gaap	Increase Decrease In Deferred Liabilities IncreaseDecreaseInDeferredLiabilities	7622000	USD
CY2019Q1	us-gaap	Increase Decrease In Deferred Liabilities IncreaseDecreaseInDeferredLiabilities	10721000	USD
CY2020Q1	slg	Increase Decrease In Operating Lease Liability IncreaseDecreaseInOperatingLeaseLiability	-2959000	USD
CY2019Q1	slg	Increase Decrease In Operating Lease Liability IncreaseDecreaseInOperatingLeaseLiability	-2866000	USD
CY2020Q1	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	42026000	USD
CY2019Q1	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	62313000	USD
CY2020Q1	us-gaap	Payments To Acquire Commercial Real Estate PaymentsToAcquireCommercialRealEstate	86846000	USD
CY2019Q1	us-gaap	Payments To Acquire Commercial Real Estate PaymentsToAcquireCommercialRealEstate	0	USD
CY2020Q1	slg	Payments To Acquire Land Buildings And Improvements PaymentsToAcquireLandBuildingsAndImprovements	101726000	USD
CY2019Q1	slg	Payments To Acquire Land Buildings And Improvements PaymentsToAcquireLandBuildingsAndImprovements	39524000	USD
CY2020Q1	slg	Payments For Acquisition Deposits And Deferred Purchase Price PaymentsForAcquisitionDepositsAndDeferredPurchasePrice	0	USD
CY2019Q1	slg	Payments For Acquisition Deposits And Deferred Purchase Price PaymentsForAcquisitionDepositsAndDeferredPurchasePrice	4910000	USD
CY2020Q1	us-gaap	Payments To Acquire Equity Method Investments PaymentsToAcquireEquityMethodInvestments	8906000	USD
CY2019Q1	us-gaap	Payments To Acquire Equity Method Investments PaymentsToAcquireEquityMethodInvestments	73351000	USD
CY2020Q1	slg	Proceeds From Equity Method Investment Dividends Or Distributions ProceedsFromEquityMethodInvestmentDividendsOrDistributions	53516000	USD
CY2019Q1	slg	Proceeds From Equity Method Investment Dividends Or Distributions ProceedsFromEquityMethodInvestmentDividendsOrDistributions	23664000	USD
CY2020Q1	us-gaap	Proceeds From Real Estate And Real Estate Joint Ventures ProceedsFromRealEstateAndRealEstateJointVentures	91156000	USD
CY2019Q1	us-gaap	Proceeds From Real Estate And Real Estate Joint Ventures ProceedsFromRealEstateAndRealEstateJointVentures	14489000	USD
CY2020Q1	slg	Payments For Proceeds From Other Investments PaymentsForProceedsFromOtherInvestments	4786000	USD
CY2019Q1	slg	Payments For Proceeds From Other Investments PaymentsForProceedsFromOtherInvestments	1056000	USD
CY2020Q1	us-gaap	Payments To Acquire Investments PaymentsToAcquireInvestments	223374000	USD
CY2019Q1	us-gaap	Payments To Acquire Investments PaymentsToAcquireInvestments	430034000	USD
CY2020Q1	slg	Repayments Or Redemption Of Debt And Preferred Equity Investments RepaymentsOrRedemptionOfDebtAndPreferredEquityInvestments	151548000	USD
CY2019Q1	slg	Repayments Or Redemption Of Debt And Preferred Equity Investments RepaymentsOrRedemptionOfDebtAndPreferredEquityInvestments	218879000	USD
CY2020Q1	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	-129418000	USD
CY2019Q1	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	-291843000	USD
CY2020Q1	us-gaap	Proceeds From Issuance Of Secured Debt ProceedsFromIssuanceOfSecuredDebt	101103000	USD
CY2019Q1	us-gaap	Proceeds From Issuance Of Secured Debt ProceedsFromIssuanceOfSecuredDebt	109872000	USD
CY2020Q1	us-gaap	Repayments Of Secured Debt RepaymentsOfSecuredDebt	102777000	USD
CY2019Q1	us-gaap	Repayments Of Secured Debt RepaymentsOfSecuredDebt	1127000	USD
CY2020Q1	us-gaap	Proceeds From Other Debt ProceedsFromOtherDebt	1125000000	USD
CY2019Q1	us-gaap	Proceeds From Other Debt ProceedsFromOtherDebt	520000000	USD
CY2020Q1	us-gaap	Repayments Of Other Debt RepaymentsOfOtherDebt	315000000	USD
CY2019Q1	us-gaap	Repayments Of Other Debt RepaymentsOfOtherDebt	230000000	USD
CY2020Q1	us-gaap	Proceeds From Stock Options Exercised ProceedsFromStockOptionsExercised	166000	USD
CY2019Q1	us-gaap	Proceeds From Stock Options Exercised ProceedsFromStockOptionsExercised	47000	USD
CY2020Q1	us-gaap	Payments Related To Tax Withholding For Share Based Compensation PaymentsRelatedToTaxWithholdingForShareBasedCompensation	4752000	USD
CY2020Q1	us-gaap	Payments For Repurchase Of Common Stock PaymentsForRepurchaseOfCommonStock	219576000	USD
CY2019Q1	us-gaap	Payments For Repurchase Of Common Stock PaymentsForRepurchaseOfCommonStock	34243000	USD
CY2020Q1	us-gaap	Payments For Repurchase Of Redeemable Preferred Stock PaymentsForRepurchaseOfRedeemablePreferredStock	19392000	USD
CY2019Q1	us-gaap	Payments For Repurchase Of Redeemable Preferred Stock PaymentsForRepurchaseOfRedeemablePreferredStock	15142000	USD
CY2020Q1	slg	Payments For Repurchase Of Partnership Units PaymentsForRepurchaseOfPartnershipUnits	18066000	USD
CY2019Q1	slg	Payments For Repurchase Of Partnership Units PaymentsForRepurchaseOfPartnershipUnits	15697000	USD
CY2020Q1	slg	Distributions To Noncontrolling Interests Other Partnerships DistributionsToNoncontrollingInterestsOtherPartnerships	492000	USD
CY2019Q1	slg	Distributions To Noncontrolling Interests Other Partnerships DistributionsToNoncontrollingInterestsOtherPartnerships	208000	USD
CY2020Q1	slg	Proceeds From Noncontrolling Interests In Other Partnerships ProceedsFromNoncontrollingInterestsInOtherPartnerships	3814000	USD
CY2019Q1	slg	Proceeds From Noncontrolling Interests In Other Partnerships ProceedsFromNoncontrollingInterestsInOtherPartnerships	161000	USD
CY2020Q1	us-gaap	Proceeds From Payments To Minority Shareholders ProceedsFromPaymentsToMinorityShareholders	-1536000	USD
CY2019Q1	us-gaap	Proceeds From Payments To Minority Shareholders ProceedsFromPaymentsToMinorityShareholders	0	USD
CY2020Q1	slg	Distribution To Noncontrolling Interest Operating Partnership DistributionToNoncontrollingInterestOperatingPartnership	1284000	USD
CY2019Q1	slg	Distribution To Noncontrolling Interest Operating Partnership DistributionToNoncontrollingInterestOperatingPartnership	3643000	USD
CY2020Q1	us-gaap	Payments Of Dividends PaymentsOfDividends	79662000	USD
CY2019Q1	us-gaap	Payments Of Dividends PaymentsOfDividends	77399000	USD
CY2019Q1	us-gaap	Payments Related To Tax Withholding For Share Based Compensation PaymentsRelatedToTaxWithholdingForShareBasedCompensation	3126000	USD
CY2020Q1	slg	Deferred Loan Costs And Capitalized Lease Obligation DeferredLoanCostsAndCapitalizedLeaseObligation	562000	USD
CY2019Q1	slg	Deferred Loan Costs And Capitalized Lease Obligation DeferredLoanCostsAndCapitalizedLeaseObligation	3367000	USD
CY2020Q1	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	466984000	USD
CY2019Q1	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	246128000	USD
CY2020Q1	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Period Increase Decrease Including Exchange Rate Effect CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect	379592000	USD
CY2019Q1	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Period Increase Decrease Including Exchange Rate Effect CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect	16598000	USD
CY2019Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	241430000	USD
CY2018Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	279113000	USD
CY2020Q1	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	621022000	USD
CY2019Q1	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	295711000	USD
CY2020Q1	us-gaap	Partners Capital Account Redemptions PartnersCapitalAccountRedemptions	84000	USD
CY2019Q1	us-gaap	Partners Capital Account Redemptions PartnersCapitalAccountRedemptions	446000	USD
CY2020Q1	us-gaap	Capital Expenditures Incurred But Not Yet Paid CapitalExpendituresIncurredButNotYetPaid	602000	USD
CY2019Q1	us-gaap	Capital Expenditures Incurred But Not Yet Paid CapitalExpendituresIncurredButNotYetPaid	9350000	USD
CY2020Q1	slg	Reversal Of Assets Held For Sale ReversalOfAssetsHeldForSale	391664000	USD
CY2019Q1	slg	Reversal Of Assets Held For Sale ReversalOfAssetsHeldForSale	0	USD
CY2020Q1	slg	Seller Financed Purchases SellerFinancedPurchases	100000000	USD
CY2019Q1	slg	Seller Financed Purchases SellerFinancedPurchases	0	USD
CY2020Q1	slg	Debt And Preferred Equity Reserves DebtAndPreferredEquityReserves	4638000	USD
CY2019Q1	slg	Debt And Preferred Equity Reserves DebtAndPreferredEquityReserves	0	USD
CY2020Q1	slg	Removalof Fully Depreciated Real Estate Assets RemovalofFullyDepreciatedRealEstateAssets	512000	USD
CY2019Q1	slg	Removalof Fully Depreciated Real Estate Assets RemovalofFullyDepreciatedRealEstateAssets	4012000	USD
CY2019Q1	us-gaap	Restricted Cash And Cash Equivalents RestrictedCashAndCashEquivalents	151388000	USD
CY2020Q1	us-gaap	Right Of Use Asset Obtained In Exchange For Operating Lease Liability RightOfUseAssetObtainedInExchangeForOperatingLeaseLiability	102782000	USD
CY2019Q1	us-gaap	Right Of Use Asset Obtained In Exchange For Operating Lease Liability RightOfUseAssetObtainedInExchangeForOperatingLeaseLiability	389120000	USD
CY2020Q1	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	554195000	USD
CY2019Q1	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	144323000	USD
CY2020Q1	us-gaap	Restricted Cash And Cash Equivalents RestrictedCashAndCashEquivalents	66827000	USD
CY2020Q1	slg	Mortgage Loanson Real Estate Commercialand Consumer Net Including Debt Investments Other MortgageLoansonRealEstateCommercialandConsumerNetIncludingDebtInvestmentsOther	1900000000	USD
CY2020Q1	slg	Debt Investments Other DebtInvestmentsOther	100000000	USD
CY2020Q1	slg	Number Of Shares On Redemption Of One Unit Of Partnership Interest NumberOfSharesOnRedemptionOfOneUnitOfPartnershipInterest	1	shares
CY2020Q1	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	621022000	USD
CY2019Q1	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	295711000	USD
CY2020Q1	us-gaap	Commitments And Contingencies CommitmentsAndContingencies		USD
CY2019Q4	us-gaap	Commitments And Contingencies CommitmentsAndContingencies		USD
CY2020Q1	slg	Numberof Real Estate Buildings NumberofRealEstateBuildings	72	building
CY2020Q1	us-gaap	Area Of Real Estate Property AreaOfRealEstateProperty	29864846	sqft
CY2020Q1	slg	Real Estate Weighted Average Occupancy RealEstateWeightedAverageOccupancy	0.936
CY2020Q1	slg	Rental Revenue Increase Decrease Acquired Lease Amortization RentalRevenueIncreaseDecreaseAcquiredLeaseAmortization	1200000	USD
CY2019Q1	slg	Rental Revenue Increase Decrease Acquired Lease Amortization RentalRevenueIncreaseDecreaseAcquiredLeaseAmortization	1200000	USD
CY2020Q1	us-gaap	Finite Lived Intangible Assets Gross FiniteLivedIntangibleAssetsGross	225025000	USD
CY2019Q4	us-gaap	Finite Lived Intangible Assets Gross FiniteLivedIntangibleAssetsGross	255198000	USD
CY2020Q1	us-gaap	Finite Lived Intangible Assets Accumulated Amortization FiniteLivedIntangibleAssetsAccumulatedAmortization	202581000	USD
CY2019Q4	us-gaap	Finite Lived Intangible Assets Accumulated Amortization FiniteLivedIntangibleAssetsAccumulatedAmortization	228223000	USD
CY2020Q1	us-gaap	Finite Lived Intangible Assets Net FiniteLivedIntangibleAssetsNet	22444000	USD
CY2019Q4	us-gaap	Finite Lived Intangible Assets Net FiniteLivedIntangibleAssetsNet	26975000	USD
CY2020Q1	slg	Finite Lived Intangible Liabilities Gross FiniteLivedIntangibleLiabilitiesGross	274208000	USD
CY2019Q4	slg	Finite Lived Intangible Liabilities Gross FiniteLivedIntangibleLiabilitiesGross	282048000	USD
CY2020Q1	slg	Finite Lived Intangible Liabilities Accumulated Amortization FiniteLivedIntangibleLiabilitiesAccumulatedAmortization	246464000	USD
CY2019Q4	slg	Finite Lived Intangible Liabilities Accumulated Amortization FiniteLivedIntangibleLiabilitiesAccumulatedAmortization	249514000	USD
CY2020Q1	slg	Finite Lived Intangible Liabilities Net FiniteLivedIntangibleLiabilitiesNet	27744000	USD
CY2019Q4	slg	Finite Lived Intangible Liabilities Net FiniteLivedIntangibleLiabilitiesNet	32534000	USD
CY2020Q1	slg	Net Intangible Assets Transferredto Assets Heldfor Sale NetIntangibleAssetsTransferredtoAssetsHeldforSale	0	USD
CY2020Q1	slg	Net Intangible Liabilities Transferredto Liabilities Relatedto Assets Heldfor Sale NetIntangibleLiabilitiesTransferredtoLiabilitiesRelatedtoAssetsHeldforSale	0	USD
CY2020Q1	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	1100000	USD
CY2019Q1	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	800000	USD
CY2020Q1	us-gaap	Use Of Estimates UseOfEstimates	<div style="line-height:120%;padding-bottom:8px;text-align:justify;font-size:10pt;"><span style="font-family:inherit;font-size:10pt;font-weight:bold;">Use of Estimates</span></div><div style="line-height:120%;padding-bottom:8px;text-align:justify;text-indent:32px;font-size:10pt;"><span style="font-family:inherit;font-size:10pt;">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>
CY2020Q1	us-gaap	Concentration Risk Credit Risk ConcentrationRiskCreditRisk	<div style="line-height:120%;padding-bottom:8px;text-align:justify;font-size:10pt;"><span style="font-family:inherit;font-size:10pt;font-weight:bold;">Concentrations of Credit Risk</span></div><div style="line-height:120%;padding-bottom:8px;text-align:justify;text-indent:32px;font-size:10pt;"><span style="font-family:inherit;font-size:10pt;">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 source of funds to offset the economic costs associated with lost revenue and the costs associated with re-tenanting a space.
CY2020Q1	us-gaap	Prior Period Reclassification Adjustment Description PriorPeriodReclassificationAdjustmentDescription	<div style="line-height:120%;padding-bottom:8px;text-align:justify;font-size:10pt;"><span style="font-family:inherit;font-size:10pt;font-weight:bold;">Reclassification</span></div><div style="line-height:120%;padding-bottom:8px;text-align:justify;text-indent:32px;font-size:10pt;"><span style="font-family:inherit;font-size:10pt;">Certain prior year balances have been reclassified to conform to our current year presentation.</span></div>
CY2019Q4	us-gaap	Mortgage Loans On Real Estate MortgageLoansOnRealEstate	1580306000	USD
CY2018Q4	us-gaap	Mortgage Loans On Real Estate MortgageLoansOnRealEstate	2099393000	USD
CY2020Q1	us-gaap	Mortgage Loans On Real Estate Amortization Of Premium MortgageLoansOnRealEstateAmortizationOfPremium	161548000	USD
CY2019	us-gaap	Mortgage Loans On Real Estate Amortization Of Premium MortgageLoansOnRealEstateAmortizationOfPremium	1190689000	USD
CY2020Q1	slg	Sec Schedule1229 Real Estate Companies Investment In Mortgage Loans On Real Estate Loan Loss Reserve Period Increase Decrease SECSchedule1229RealEstateCompaniesInvestmentInMortgageLoansOnRealEstateLoanLossReservePeriodIncreaseDecrease	-36207000	USD
CY2019	slg	Sec Schedule1229 Real Estate Companies Investment In Mortgage Loans On Real Estate Loan Loss Reserve Period Increase Decrease SECSchedule1229RealEstateCompaniesInvestmentInMortgageLoansOnRealEstateLoanLossReservePeriodIncreaseDecrease	4000000	USD
CY2020Q1	us-gaap	Mortgage Loans On Real Estate MortgageLoansOnRealEstate	1783336000	USD
CY2019Q4	us-gaap	Mortgage Loans On Real Estate MortgageLoansOnRealEstate	1580306000	USD
CY2020Q1	us-gaap	Mortgage Loans On Real Estate Commercial And Consumer Net MortgageLoansOnRealEstateCommercialAndConsumerNet	1783336000	USD
CY2020Q1	slg	Mortgage Loanson Real Estate Senior Financing MortgageLoansonRealEstateSeniorFinancing	6129560000	USD
CY2019Q4	us-gaap	Allowance For Loan And Lease Losses Real Estate AllowanceForLoanAndLeaseLossesRealEstate	1750000	USD
CY2018Q4	us-gaap	Allowance For Loan And Lease Losses Real Estate AllowanceForLoanAndLeaseLossesRealEstate	5750000	USD
CY2020Q1	slg	Debt And Equity Securities Credit Loss Expense Reversal DebtAndEquitySecuritiesCreditLossExpenseReversal	8403000	USD
CY2019	slg	Debt And Equity Securities Credit Loss Expense Reversal DebtAndEquitySecuritiesCreditLossExpenseReversal	0	USD
CY2020Q1	slg	Financing Receivable Allowance For Credit Losses Write Offs And Reclassifications FinancingReceivableAllowanceForCreditLossesWriteOffsAndReclassifications	0	USD
CY2019	slg	Financing Receivable Allowance For Credit Losses Write Offs And Reclassifications FinancingReceivableAllowanceForCreditLossesWriteOffsAndReclassifications	4000000	USD
CY2020Q1	us-gaap	Allowance For Loan And Lease Losses Real Estate AllowanceForLoanAndLeaseLossesRealEstate	37957000	USD
CY2019Q4	us-gaap	Allowance For Loan And Lease Losses Real Estate AllowanceForLoanAndLeaseLossesRealEstate	1750000	USD
CY2020Q1	us-gaap	Financing Receivable Recorded Investment Nonaccrual Status FinancingReceivableRecordedInvestmentNonaccrualStatus	28500000	USD
CY2019Q4	slg	Debt And Equity Securities Weighted Average Risk Rating DebtAndEquitySecuritiesWeightedAverageRiskRating	1.4
CY2020Q1	slg	Financing Receivable Portfolio Segments Number FinancingReceivablePortfolioSegmentsNumber	1	segment
CY2020Q1	slg	Financing Receivable Recorded In Other Assets FinancingReceivableRecordedInOtherAssets	120700000	USD
CY2019Q4	slg	Financing Receivable Recorded In Other Assets FinancingReceivableRecordedInOtherAssets	131100000	USD
CY2020Q1	us-gaap	Provision For Loan Losses Expensed ProvisionForLoanLossesExpensed	2800000	USD
CY2020Q1	srt	Mortgage Loans On Real Estate Interest Rate MortgageLoansOnRealEstateInterestRate	0.0787
CY2020Q1	slg	Variable Interest Entity Not Primary Beneficiary Investment VariableInterestEntityNotPrimaryBeneficiaryInvestment	138100000	USD
CY2019Q4	slg	Variable Interest Entity Not Primary Beneficiary Investment VariableInterestEntityNotPrimaryBeneficiaryInvestment	145900000	USD
CY2020Q1	us-gaap	Equity Method Investment Difference Between Carrying Amount And Underlying Equity EquityMethodInvestmentDifferenceBetweenCarryingAmountAndUnderlyingEquity	122600000	USD
CY2020Q1	us-gaap	Deferred Costs Leasing Gross DeferredCostsLeasingGross	506314000	USD
CY2019Q4	us-gaap	Deferred Costs Leasing Gross DeferredCostsLeasingGross	466136000	USD
CY2020Q1	slg	Accumulated Amortization Of Deferred Costs AccumulatedAmortizationOfDeferredCosts	274040000	USD
CY2019Q4	slg	Accumulated Amortization Of Deferred Costs AccumulatedAmortizationOfDeferredCosts	260853000	USD
CY2020Q1	us-gaap	Deferred Costs Current And Noncurrent DeferredCostsCurrentAndNoncurrent	232274000	USD
CY2019Q4	us-gaap	Deferred Costs Current And Noncurrent DeferredCostsCurrentAndNoncurrent	205283000	USD
CY2020Q1	slg	Secured Debt Bearing Fixed Interest Amount SecuredDebtBearingFixedInterestAmount	1129910000	USD
CY2019Q4	slg	Secured Debt Bearing Fixed Interest Amount SecuredDebtBearingFixedInterestAmount	1383449000	USD
CY2020Q1	slg	Secured Debt Bearing Variable Interest Amount SecuredDebtBearingVariableInterestAmount	880306000	USD
CY2019Q4	slg	Secured Debt Bearing Variable Interest Amount SecuredDebtBearingVariableInterestAmount	828434000	USD
CY2020Q1	slg	Secured Debt Gross SecuredDebtGross	2010216000	USD
CY2019Q4	slg	Secured Debt Gross SecuredDebtGross	2211883000	USD
CY2020Q1	slg	Secured Debt Deferred Finance Costs Net SecuredDebtDeferredFinanceCostsNet	23143000	USD
CY2019Q4	slg	Secured Debt Deferred Finance Costs Net SecuredDebtDeferredFinanceCostsNet	28630000	USD
CY2020Q1	us-gaap	Secured Debt SecuredDebt	1987073000	USD
CY2019Q4	us-gaap	Secured Debt SecuredDebt	2183253000	USD
CY2020Q1	us-gaap	Collateral Already Posted Aggregate Fair Value CollateralAlreadyPostedAggregateFairValue	3000000000.0	USD
CY2019Q4	us-gaap	Collateral Already Posted Aggregate Fair Value CollateralAlreadyPostedAggregateFairValue	3300000000	USD
CY2020Q1	us-gaap	Long Term Debt Maturities Repayments Of Principal Remainder Of Fiscal Year LongTermDebtMaturitiesRepaymentsOfPrincipalRemainderOfFiscalYear	63374000	USD
CY2020Q1	us-gaap	Long Term Debt Maturities Repayments Of Principal In Year Two LongTermDebtMaturitiesRepaymentsOfPrincipalInYearTwo	593453000	USD
CY2020Q1	us-gaap	Long Term Debt Maturities Repayments Of Principal In Year Three LongTermDebtMaturitiesRepaymentsOfPrincipalInYearThree	1550682000	USD
CY2020Q1	us-gaap	Long Term Debt Maturities Repayments Of Principal In Year Four LongTermDebtMaturitiesRepaymentsOfPrincipalInYearFour	2657301000	USD
CY2020Q1	us-gaap	Long Term Debt Maturities Repayments Of Principal In Year Five LongTermDebtMaturitiesRepaymentsOfPrincipalInYearFive	478781000	USD
CY2020Q1	us-gaap	Long Term Debt Maturities Repayments Of Principal After Year Five LongTermDebtMaturitiesRepaymentsOfPrincipalAfterYearFive	816625000	USD
CY2020Q1	slg	Long Term Debt Maturities Repayments Of Principal LongTermDebtMaturitiesRepaymentsOfPrincipal	6160216000	USD
CY2020Q1	us-gaap	Interest Expense InterestExpense	56813000	USD
CY2019Q1	us-gaap	Interest Expense InterestExpense	60810000	USD
CY2020Q1	us-gaap	Finance Lease Interest Expense FinanceLeaseInterestExpense	1663000	USD
CY2019Q1	us-gaap	Finance Lease Interest Expense FinanceLeaseInterestExpense	804000	USD
CY2020Q1	us-gaap	Interest Costs Incurred Capitalized InterestCostsIncurredCapitalized	20483000	USD
CY2019Q1	us-gaap	Interest Costs Incurred Capitalized InterestCostsIncurredCapitalized	10509000	USD
CY2020Q1	us-gaap	Interest Income Operating InterestIncomeOperating	499000	USD
CY2019Q1	us-gaap	Interest Income Operating InterestIncomeOperating	580000	USD
CY2020Q1	us-gaap	Interest Income Expense Net InterestIncomeExpenseNet	-37494000	USD
CY2019Q1	us-gaap	Interest Income Expense Net InterestIncomeExpenseNet	-50525000	USD
CY2020Q1	us-gaap	Due From Joint Ventures DueFromJointVentures	18996000	USD
CY2019Q4	us-gaap	Due From Joint Ventures DueFromJointVentures	9352000	USD
CY2020Q1	us-gaap	Due From Other Related Parties DueFromOtherRelatedParties	7096000	USD
CY2019Q4	us-gaap	Due From Other Related Parties DueFromOtherRelatedParties	11769000	USD
CY2020Q1	us-gaap	Due From Related Parties DueFromRelatedParties	26092000	USD
CY2019Q4	us-gaap	Due From Related Parties DueFromRelatedParties	21121000	USD
CY2020Q1	slg	Total Shares Authorized TotalSharesAuthorized	260000000	shares
CY2020Q1	slg	Total Par Or Stated Value Per Share TotalParOrStatedValuePerShare	0.01
CY2020Q1	us-gaap	Common Stock Shares Authorized CommonStockSharesAuthorized	160000000	shares
CY2020Q1	us-gaap	Common Stock Par Or Stated Value Per Share CommonStockParOrStatedValuePerShare	0.01
CY2020Q1	us-gaap	Excess Stock Shares Authorized ExcessStockSharesAuthorized	75000000	shares
CY2020Q1	slg	Excess Stock Par Or Stated Value Per Share ExcessStockParOrStatedValuePerShare	0.01
CY2020Q1	us-gaap	Preferred Stock Shares Authorized PreferredStockSharesAuthorized	25000000	shares
CY2020Q1	us-gaap	Preferred Stock Par Or Stated Value Per Share PreferredStockParOrStatedValuePerShare	0.01
CY2020Q1	us-gaap	Excess Stock Shares Issued ExcessStockSharesIssued	0	shares
CY2017	us-gaap	Stock Repurchased During Period Shares StockRepurchasedDuringPeriodShares	8342411	shares
CY2017	us-gaap	Treasury Stock Acquired Average Cost Per Share TreasuryStockAcquiredAverageCostPerShare	101.64
CY2018	us-gaap	Stock Repurchased During Period Shares StockRepurchasedDuringPeriodShares	9744911	shares
CY2018	us-gaap	Treasury Stock Acquired Average Cost Per Share TreasuryStockAcquiredAverageCostPerShare	96.22
CY2019	us-gaap	Stock Repurchased During Period Shares StockRepurchasedDuringPeriodShares	4596171	shares
CY2019	us-gaap	Treasury Stock Acquired Average Cost Per Share TreasuryStockAcquiredAverageCostPerShare	83.62
CY2020Q1	us-gaap	Stock Repurchased During Period Shares StockRepurchasedDuringPeriodShares	2637099	shares
CY2020Q1	us-gaap	Treasury Stock Acquired Average Cost Per Share TreasuryStockAcquiredAverageCostPerShare	83.25
CY2020Q1	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	114801000	USD
CY2019Q1	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	43792000	USD
CY2020Q1	slg	Net Income Loss Available To Common Stockholders After Distributed And Undistributed Earnings Allocation Basic NetIncomeLossAvailableToCommonStockholdersAfterDistributedAndUndistributedEarningsAllocationBasic	114240000	USD
CY2019Q1	slg	Net Income Loss Available To Common Stockholders After Distributed And Undistributed Earnings Allocation Basic NetIncomeLossAvailableToCommonStockholdersAfterDistributedAndUndistributedEarningsAllocationBasic	43668000	USD
CY2020Q1	us-gaap	Undistributed Earnings Loss Allocated To Participating Securities Diluted UndistributedEarningsLossAllocatedToParticipatingSecuritiesDiluted	113000	USD
CY2019Q1	us-gaap	Undistributed Earnings Loss Allocated To Participating Securities Diluted UndistributedEarningsLossAllocatedToParticipatingSecuritiesDiluted	124000	USD
CY2020Q1	slg	Distributed Earnings Diluted DistributedEarningsDiluted	448000	USD
CY2019Q1	slg	Distributed Earnings Diluted DistributedEarningsDiluted	0	USD
CY2020Q1	us-gaap	Dilutive Securities Effect On Basic Earnings Per Share Other DilutiveSecuritiesEffectOnBasicEarningsPerShareOther	6202000	USD
CY2019Q1	us-gaap	Dilutive Securities Effect On Basic Earnings Per Share Other DilutiveSecuritiesEffectOnBasicEarningsPerShareOther	2278000	USD
CY2020Q1	us-gaap	Net Income Loss Available To Common Stockholders Diluted NetIncomeLossAvailableToCommonStockholdersDiluted	121003000	USD
CY2019Q1	us-gaap	Net Income Loss Available To Common Stockholders Diluted NetIncomeLossAvailableToCommonStockholdersDiluted	46070000	USD
CY2020Q1	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	77864000	shares
CY2019Q1	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	83313000	shares
CY2020Q1	slg	Incremental Common Shares Attributable To Redemption Of Units To Common Shares IncrementalCommonSharesAttributableToRedemptionOfUnitsToCommonShares	4220000	shares
CY2019Q1	slg	Incremental Common Shares Attributable To Redemption Of Units To Common Shares IncrementalCommonSharesAttributableToRedemptionOfUnitsToCommonShares	4333000	shares
CY2020Q1	us-gaap	Incremental Common Shares Attributable To Share Based Payment Arrangements IncrementalCommonSharesAttributableToShareBasedPaymentArrangements	483000	shares
CY2019Q1	us-gaap	Incremental Common Shares Attributable To Share Based Payment Arrangements IncrementalCommonSharesAttributableToShareBasedPaymentArrangements	164000	shares
CY2020Q1	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	82567000	shares
CY2019Q1	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	87810000	shares
CY2020Q1	us-gaap	Antidilutive Securities Excluded From Computation Of Earnings Per Share Amount AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount	1204736	shares
CY2019Q1	us-gaap	Antidilutive Securities Excluded From Computation Of Earnings Per Share Amount AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount	1211943	shares
CY2020Q1	us-gaap	Employee Service Share Based Compensation Allocation Of Recognized Period Costs Capitalized Amount EmployeeServiceShareBasedCompensationAllocationOfRecognizedPeriodCostsCapitalizedAmount	600000	USD
CY2019Q1	us-gaap	Employee Service Share Based Compensation Allocation Of Recognized Period Costs Capitalized Amount EmployeeServiceShareBasedCompensationAllocationOfRecognizedPeriodCostsCapitalizedAmount	500000	USD
CY2020Q1	us-gaap	Other Comprehensive Income Loss Before Reclassifications Net Of Tax OtherComprehensiveIncomeLossBeforeReclassificationsNetOfTax	-53743000	USD
CY2020Q1	us-gaap	Reclassification From Accumulated Other Comprehensive Income Current Period Net Of Tax ReclassificationFromAccumulatedOtherComprehensiveIncomeCurrentPeriodNetOfTax	-1360000	USD
CY2020Q1	slg	Other Comprehensive Income Loss Deferred Net Lossfrom Terminated Hedges OtherComprehensiveIncomeLossDeferredNetLossfromTerminatedHedges	-400000	USD
CY2019Q4	slg	Other Comprehensive Income Loss Deferred Net Lossfrom Terminated Hedges OtherComprehensiveIncomeLossDeferredNetLossfromTerminatedHedges	-700000	USD
CY2020Q1	us-gaap	Available For Sale Securities Debt Securities AvailableForSaleSecuritiesDebtSecurities	25353000	USD
CY2020Q1	us-gaap	Derivative Fair Value Of Derivative Asset DerivativeFairValueOfDerivativeAsset	2000	USD
CY2019Q4	us-gaap	Available For Sale Securities Debt Securities AvailableForSaleSecuritiesDebtSecurities	29887000	USD
CY2019Q4	us-gaap	Derivative Fair Value Of Derivative Asset DerivativeFairValueOfDerivativeAsset	4419000	USD
CY2020Q1	slg	Accumulated Other Comprehensive Income Loss Gain Lossfrom Changesin Fair Value AccumulatedOtherComprehensiveIncomeLossGainLossfromChangesinFairValue	0	USD
CY2020Q1	us-gaap	Derivative Net Liability Position Aggregate Fair Value DerivativeNetLiabilityPositionAggregateFairValue	69200000	USD
CY2020Q1	us-gaap	Assets Needed For Immediate Settlement Aggregate Fair Value AssetsNeededForImmediateSettlementAggregateFairValue	70600000	USD
CY2020Q1	us-gaap	Cash Flow Hedge Gain Loss To Be Reclassified Within Twelve Months CashFlowHedgeGainLossToBeReclassifiedWithinTwelveMonths	-16700000	USD
CY2020Q1	slg	Cash Flow Hedge Gain Loss To Be Reclassified Within Twelve Months Into Equity In Net Income CashFlowHedgeGainLossToBeReclassifiedWithinTwelveMonthsIntoEquityInNetIncome	-5800000	USD
CY2020Q1	us-gaap	Other Comprehensive Income Loss Cash Flow Hedge Gain Loss Before Reclassification And Tax OtherComprehensiveIncomeLossCashFlowHedgeGainLossBeforeReclassificationAndTax	-52171000	USD
CY2019Q1	us-gaap	Other Comprehensive Income Loss Cash Flow Hedge Gain Loss Before Reclassification And Tax OtherComprehensiveIncomeLossCashFlowHedgeGainLossBeforeReclassificationAndTax	-17332000	USD
CY2020Q1	us-gaap	Interest Rate Cash Flow Hedge Gain Loss Reclassified To Earnings Net InterestRateCashFlowHedgeGainLossReclassifiedToEarningsNet	1436000	USD
CY2019Q1	us-gaap	Interest Rate Cash Flow Hedge Gain Loss Reclassified To Earnings Net InterestRateCashFlowHedgeGainLossReclassifiedToEarningsNet	-903000	USD
CY2020Q1	us-gaap	Operating Lease Lease Income Lease Payments OperatingLeaseLeaseIncomeLeasePayments	194224000	USD
CY2019Q1	us-gaap	Operating Lease Lease Income Lease Payments OperatingLeaseLeaseIncomeLeasePayments	211430000	USD
CY2020Q1	us-gaap	Operating Lease Variable Lease Income OperatingLeaseVariableLeaseIncome	27168000	USD
CY2019Q1	us-gaap	Operating Lease Variable Lease Income OperatingLeaseVariableLeaseIncome	27479000	USD
CY2020Q1	slg	Operating Lease Lease Income Fixed And Variable Lease Payments OperatingLeaseLeaseIncomeFixedAndVariableLeasePayments	221392000	USD
CY2019Q1	slg	Operating Lease Lease Income Fixed And Variable Lease Payments OperatingLeaseLeaseIncomeFixedAndVariableLeasePayments	238909000	USD
CY2020Q1	us-gaap	Amortization Of Above And Below Market Leases AmortizationOfAboveAndBelowMarketLeases	1239000	USD
CY2019Q1	us-gaap	Amortization Of Above And Below Market Leases AmortizationOfAboveAndBelowMarketLeases	1209000	USD
CY2020Q1	us-gaap	Operating Lease Lease Income OperatingLeaseLeaseIncome	222631000	USD
CY2019Q1	us-gaap	Operating Lease Lease Income OperatingLeaseLeaseIncome	240118000	USD
CY2020Q1	slg	Operating Leases Minimum Lease Term OperatingLeasesMinimumLeaseTerm	P1Y
CY2020Q1	us-gaap	Finance Lease Liability Payments Remainder Of Fiscal Year FinanceLeaseLiabilityPaymentsRemainderOfFiscalYear	5812000	USD
CY2020Q1	us-gaap	Lessee Operating Lease Liability Payments Remainder Of Fiscal Year LesseeOperatingLeaseLiabilityPaymentsRemainderOfFiscalYear	22077000	USD
CY2020Q1	us-gaap	Finance Lease Liability Payments Due Year Two FinanceLeaseLiabilityPaymentsDueYearTwo	34885000	USD
CY2020Q1	us-gaap	Lessee Operating Lease Liability Payments Due Year Two LesseeOperatingLeaseLiabilityPaymentsDueYearTwo	29452000	USD
CY2020Q1	us-gaap	Finance Lease Liability Payments Due Year Three FinanceLeaseLiabilityPaymentsDueYearThree	5881000	USD
CY2020Q1	us-gaap	Lessee Operating Lease Liability Payments Due Year Three LesseeOperatingLeaseLiabilityPaymentsDueYearThree	27148000	USD
CY2020Q1	us-gaap	Finance Lease Liability Payments Due Year Four FinanceLeaseLiabilityPaymentsDueYearFour	5927000	USD
CY2020Q1	us-gaap	Lessee Operating Lease Liability Payments Due Year Four LesseeOperatingLeaseLiabilityPaymentsDueYearFour	24844000	USD
CY2020Q1	us-gaap	Finance Lease Liability Payments Due Year Five FinanceLeaseLiabilityPaymentsDueYearFive	5999000	USD
CY2020Q1	us-gaap	Lessee Operating Lease Liability Payments Due Year Five LesseeOperatingLeaseLiabilityPaymentsDueYearFive	24863000	USD
CY2020Q1	slg	Finance Lease Liability Payments Due Year Six FinanceLeaseLiabilityPaymentsDueYearSix	6266000	USD
CY2020Q1	slg	Lessee Operating Lease Liability Payments Due Year Six LesseeOperatingLeaseLiabilityPaymentsDueYearSix	24962000	USD
CY2020Q1	slg	Finance Lease Liability Payments Due After Year Six FinanceLeaseLiabilityPaymentsDueAfterYearSix	1018013000	USD
CY2020Q1	slg	Lessee Operating Lease Liability Payments Due After Year Six LesseeOperatingLeaseLiabilityPaymentsDueAfterYearSix	618326000	USD
CY2020Q1	us-gaap	Finance Lease Liability Payments Due FinanceLeaseLiabilityPaymentsDue	1082783000	USD
CY2020Q1	us-gaap	Lessee Operating Lease Liability Payments Due LesseeOperatingLeaseLiabilityPaymentsDue	771672000	USD
CY2020Q1	us-gaap	Finance Lease Liability Undiscounted Excess Amount FinanceLeaseLiabilityUndiscountedExcessAmount	920484000	USD
CY2020Q1	us-gaap	Lessee Operating Lease Liability Undiscounted Excess Amount LesseeOperatingLeaseLiabilityUndiscountedExcessAmount	407682000	USD
CY2020Q1	us-gaap	Finance Lease Liability FinanceLeaseLiability	162299000	USD
CY2020Q1	us-gaap	Operating Lease Liability OperatingLeaseLiability	363990000	USD
CY2020Q1	us-gaap	Lessor Operating Lease Payments To Be Received LessorOperatingLeasePaymentsToBeReceived	1600000000	USD
CY2020Q1	slg	Finance Lease Cost FinanceLeaseCost	2000000.0	USD
CY2020Q1	us-gaap	Finance Lease Interest Expense FinanceLeaseInterestExpense	1700000	USD
CY2020Q1	us-gaap	Finance Lease Right Of Use Asset Amortization FinanceLeaseRightOfUseAssetAmortization	300000	USD
CY2019Q1	slg	Finance Lease Cost FinanceLeaseCost	1100000	USD
CY2019Q1	us-gaap	Finance Lease Interest Expense FinanceLeaseInterestExpense	800000	USD
CY2019Q1	us-gaap	Finance Lease Right Of Use Asset Amortization FinanceLeaseRightOfUseAssetAmortization	300000	USD
CY2020Q1	us-gaap	Operating Lease Cost OperatingLeaseCost	7400000	USD
CY2019Q1	us-gaap	Operating Lease Cost OperatingLeaseCost	8300000	USD
CY2020Q1	us-gaap	Operating Lease Weighted Average Discount Rate Percent OperatingLeaseWeightedAverageDiscountRatePercent	0.0801
CY2020Q1	us-gaap	Operating Lease Weighted Average Remaining Lease Term1 OperatingLeaseWeightedAverageRemainingLeaseTerm1	P70Y
CY2020Q1	us-gaap	Number Of Reportable Segments NumberOfReportableSegments	2	segment
CY2020Q1	us-gaap	Revenues Revenues	314303000	USD
CY2019Q1	us-gaap	Revenues Revenues	304255000	USD
CY2020Q1	slg	Income Loss From Continuing Operations Before Realized Gain Loss On Disposal Of Equity Method Investment IncomeLossFromContinuingOperationsBeforeRealizedGainLossOnDisposalOfEquityMethodInvestment	127114000	USD
CY2019Q1	slg	Income Loss From Continuing Operations Before Realized Gain Loss On Disposal Of Equity Method Investment IncomeLossFromContinuingOperationsBeforeRealizedGainLossOnDisposalOfEquityMethodInvestment	52769000	USD
CY2020Q1	us-gaap	Assets Assets	13220607000	USD
CY2019Q4	us-gaap	Assets Assets	12766320000	USD
CY2020Q1	us-gaap	Selling General And Administrative Expense SellingGeneralAndAdministrativeExpense	19600000	USD
CY2019Q1	us-gaap	Selling General And Administrative Expense SellingGeneralAndAdministrativeExpense	26000000.0	USD

Files In Submission

Name	View Source	Status
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$SLG
SL Green Realty Corp Stock $slg

2020 Q1 Form 10-Q Financial Statement

#000104097120000016 Filed on May 11, 2020

Income Statement

Balance Sheet

Cashflow Statement

Facts In Submission

Files In Submission

$SLG SL Green Realty Corp Stock $slg

2020 Q1 Form 10-Q Financial Statement

#000104097120000016 Filed on May 11, 2020

Income Statement

Balance Sheet

Cashflow Statement

Facts In Submission

Files In Submission

$SLG
SL Green Realty Corp Stock $slg