$SLG
SL Green Realty Corp Stock $slg

$slg Overview Financials Valuation SEC Filings Company Website

2013 Q1 Form 10-Q Financial Statement

#000110465913040293 Filed on May 10, 2013

Income Statement

Concept	2013 Q1	2012 Q1
Revenue	$340.9M	$334.6M
YoY Change	1.9%	1.63%
Cost Of Revenue	$131.8M	$131.9M
YoY Change	-0.08%	21.9%
Gross Profit	$221.9M	$202.7M
YoY Change	9.47%	-8.28%
Gross Profit Margin	65.08%	60.58%
Selling, General & Admin	$21.07M	$20.20M
YoY Change	4.31%	-10.24%
% of Gross Profit	9.49%	9.96%
Research & Development
YoY Change
% of Gross Profit
Depreciation & Amortization	$85.15M	$80.66M
YoY Change	5.56%	18.62%
% of Gross Profit	38.37%	39.79%
Operating Expenses	$21.07M	$20.20M
YoY Change	4.31%	-77.51%
Operating Profit	$200.8M	$182.5M
YoY Change	10.04%	39.1%
Interest Expense	$81.22M	$80.55M
YoY Change	0.83%	-305.48%
% of Operating Profit	40.44%	44.13%
Other Income/Expense, Net		$0.00
YoY Change
Pretax Income	$37.30M	$22.99M
YoY Change	62.24%	-75.01%
Income Tax	$1.600M	$0.00
% Of Pretax Income	4.29%	0.0%
Net Earnings	$26.32M	$32.80M
YoY Change	-19.77%	-62.91%
Net Earnings / Revenue	7.72%	9.8%
Basic Earnings Per Share	$0.21	$0.29
Diluted Earnings Per Share	$0.21	$0.29
COMMON SHARES
Basic Shares Outstanding	91.40M shares	86.74M shares
Diluted Shares Outstanding	94.30M shares	90.17M shares

Balance Sheet

Concept	2013 Q1	2012 Q1
SHORT-TERM ASSETS
Cash & Short-Term Investments	$243.1M	$134.0M
YoY Change	81.42%	-42.74%
Cash & Equivalents	$220.1M	$133.7M
Short-Term Investments	$22.99M
Other Short-Term Assets
YoY Change
Inventory	$0.00
Prepaid Expenses
Receivables	$408.0M	$337.0M
Other Receivables	$0.00	$0.00
Total Short-Term Assets	$628.0M	$471.0M
YoY Change	33.33%	-3.48%
LONG-TERM ASSETS
Property, Plant & Equipment	$10.27B	$10.14B
YoY Change	1.32%	22.0%
Goodwill
YoY Change
Intangibles
YoY Change
Long-Term Investments	$1.073B	$2.048B
YoY Change	-47.6%	31.28%
Other Assets	$382.0M	$310.0M
YoY Change	23.23%	-21.12%
Total Long-Term Assets	$13.92B	$13.29B
YoY Change	4.7%	21.33%
TOTAL ASSETS
Total Short-Term Assets	$628.0M	$471.0M
Total Long-Term Assets	$13.92B	$13.29B
Total Assets	$14.54B	$13.76B
YoY Change	5.68%	20.28%
SHORT-TERM LIABILITIES
YoY Change
Accounts Payable	$144.0M	$138.0M
YoY Change	4.35%	11.29%
Accrued Expenses	$74.00M	$116.0M
YoY Change	-36.21%	-23.18%
Deferred Revenue
YoY Change
Short-Term Debt	$0.00	$0.00
YoY Change
Long-Term Debt Due
YoY Change
Total Short-Term Liabilities	$325.0M	$350.0M
YoY Change	-7.14%	-0.28%
LONG-TERM LIABILITIES
Long-Term Debt	$6.721B	$6.098B
YoY Change	10.22%	24.04%
Other Long-Term Liabilities	$322.0M	$374.0M
YoY Change	-13.9%	-10.1%
Total Long-Term Liabilities	$7.043B	$6.472B
YoY Change	8.82%	21.38%
TOTAL LIABILITIES
Total Short-Term Liabilities	$325.0M	$350.0M
Total Long-Term Liabilities	$7.043B	$6.472B
Total Liabilities	$7.369B	$7.550B
YoY Change	-2.4%	18.97%
SHAREHOLDERS EQUITY
Retained Earnings	$1.665B
YoY Change
Common Stock	$953.0K
YoY Change
Preferred Stock
YoY Change
Treasury Stock (at cost)	$322.9M
YoY Change
Treasury Stock Shares	3.646M shares
Shareholders Equity	$6.417B	$6.212B
YoY Change
Total Liabilities & Shareholders Equity	$14.54B	$13.76B
YoY Change	5.68%	20.28%

Cashflow Statement

Concept	2013 Q1	2012 Q1
OPERATING ACTIVITIES
Net Income	$26.32M	$32.80M
YoY Change	-19.77%	-62.91%
Depreciation, Depletion And Amortization	$85.15M	$80.66M
YoY Change	5.56%	18.62%
Cash From Operating Activities	$89.56M	$56.83M
YoY Change	57.58%	-25.9%
INVESTING ACTIVITIES
Capital Expenditures	-$60.10M	-$178.1M
YoY Change	-66.25%	467.2%
Acquisitions
YoY Change
Other Investing Activities	-$109.0M	-$116.1M
YoY Change	-6.12%	-277.25%
Cash From Investing Activities	-$169.1M	-$294.2M
YoY Change	-42.53%	-962.73%
FINANCING ACTIVITIES
Cash Dividend Paid	$38.59M	$28.45M
YoY Change	35.63%
Common Stock Issuance & Retirement, Net	-$24.00K	-$111.8M
YoY Change	-99.98%
Debt Paid & Issued, Net
YoY Change
Cash From Financing Activities	$109.6M	$232.8M
YoY Change	-52.91%	-211.08%
NET CHANGE
Cash From Operating Activities	$89.56M	$56.83M
Cash From Investing Activities	-$169.1M	-$294.2M
Cash From Financing Activities	$109.6M	$232.8M
Net Change In Cash	$30.12M	-$4.527M
YoY Change	-765.34%	-95.42%
FREE CASH FLOW
Cash From Operating Activities	$89.56M	$56.83M
Capital Expenditures	-$60.10M	-$178.1M
Free Cash Flow	$149.7M	$234.9M
YoY Change	-36.3%	117.33%

Facts In Submission

Frame	Concept Type	Concept / XBRL Key	Value	Unit
CY2013Q1	us-gaap	Number Of Real Estate Properties NumberOfRealEstateProperties	67	property
CY2013Q1	us-gaap	Area Of Real Estate Property AreaOfRealEstateProperty	29721879
CY2013Q1	slg	Real Estate Weighted Average Occupancy RealEstateWeightedAverageOccupancy	0.916	pure
CY2013Q1	us-gaap	Mortgage Loans On Real Estate Commercial And Consumer Net MortgageLoansOnRealEstateCommercialAndConsumerNet	1443834000	USD
CY2013Q1	slg	Number Of Shares On Redemption Of One Unit Of Partnership Interest NumberOfSharesOnRedemptionOfOneUnitOfPartnershipInterest	1	shares
CY2013Q1	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	1600000	USD
CY2012Q1	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	0	USD
CY2013Q1	slg	Minimum Percentage Of Taxable Income To Be Distributed As Dividend To Maintain Qualification As Reit MinimumPercentageOfTaxableIncomeToBeDistributedAsDividendToMaintainQualificationAsREIT	0.90	pure
CY2013Q1	slg	Financing Receivable Number Of Days Past Due For Suspending Income Recognition FinancingReceivableNumberOfDaysPastDueForSuspendingIncomeRecognition	P90D
CY2013Q1	us-gaap	Use Of Estimates UseOfEstimates	<div style="font-size:10.0pt;font-family:Times New Roman;"> <p style="MARGIN: 0in 0in 0pt;"><b><font style="FONT-WEIGHT: bold; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman;" size="2">Use of Estimates</font></b></p> <p style="MARGIN: 0in 0in 0pt;"> </p> <p style="MARGIN: 0in 0in 0pt;"><font style="FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman;" size="2">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.</font></p> </div>
CY2013Q1	us-gaap	Prior Period Reclassification Adjustment Description PriorPeriodReclassificationAdjustmentDescription	<div style="font-size:10.0pt;font-family:Times New Roman;"> <p style="MARGIN: 0in 0in 0pt;"><b><font style="FONT-WEIGHT: bold; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman;" size="2">Reclassification</font></b></p> <p style="MARGIN: 0in 0in 0pt;"> </p> <p style="MARGIN: 0in 0in 0pt;"><font style="FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman;" size="2">Certain prior year balances have been reclassified to conform to our current year presentation primarily in order to eliminate discontinued operations from income from continuing operations.</font></p> </div>
CY2013Q1	slg	Rental Revenue Increase Decrease Acquired Lease Amortization RentalRevenueIncreaseDecreaseAcquiredLeaseAmortization	3900000	USD
CY2012Q1	slg	Interest Expense Increase Decrease Assumed Above Market Rate Mortgage Amortization InterestExpenseIncreaseDecreaseAssumedAboveMarketRateMortgageAmortization	1000000	USD
CY2012Q4	us-gaap	Finite Lived Intangible Assets Net FiniteLivedIntangibleAssetsNet	462754000	USD
CY2013Q1	us-gaap	Concentration Risk Credit Risk ConcentrationRiskCreditRisk	<div style="font-size:10.0pt;font-family:Times New Roman;"> <p style="MARGIN: 0in 0in 0pt;"><b><font style="FONT-WEIGHT: bold; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman;" size="2">Concentrations of Credit Risk</font></b></p> <p style="MARGIN: 0in 0in 0pt;"> </p> <p style="MARGIN: 0in 0in 0pt;"><font style="FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman;" size="2">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 in excess of insured amounts with high quality financial institutions.  The collateral securing our debt and preferred equity investments is located in the New York Metropolitan area. See Note 5, “Debt and Preferred Equity Investments.” We perform ongoing credit evaluations 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 rent and the costs associated with re-tenanting the space.  Although the properties in our real estate portfolio are primarily located in Manhattan, we also have Suburban properties located in Brooklyn, Long Island, Westchester County, Connecticut, Northern New Jersey and the west coast.  The tenants located in our buildings operate in various industries.  Other than three tenants who account for approximately 6.0%, 6.5% and 7.0% of our share of annualized cash rent, no other tenant in our portfolio accounted for more than 1.9% of our annualized cash rent, including our share of joint venture annualized cash rent at March 31, 2013. Approximately 9%, 7%, 6% and 6% of our annualized cash rent for consolidated properties for the three months ended March 31, 2013 was attributable to 1515 Broadway, 1185 Avenue of the Americas, 420 Lexington Avenue and One Madison Avenue, respectively.  In addition, two debt and preferred equity investments accounted for more than 10% of the income earned on debt and preferred equity investments during the three months ended March 31, 2013.</font></p> </div>
CY2012Q1	slg	Rental Revenue Increase Decrease Acquired Lease Amortization RentalRevenueIncreaseDecreaseAcquiredLeaseAmortization	2100000	USD
CY2013Q1	slg	Interest Expense Increase Decrease Assumed Above Market Rate Mortgage Amortization InterestExpenseIncreaseDecreaseAssumedAboveMarketRateMortgageAmortization	1300000	USD
CY2013Q1	us-gaap	Finite Lived Intangible Assets Gross FiniteLivedIntangibleAssetsGross	725708000	USD
CY2012Q4	us-gaap	Finite Lived Intangible Assets Gross FiniteLivedIntangibleAssetsGross	725861000	USD
CY2013Q1	us-gaap	Finite Lived Intangible Assets Accumulated Amortization FiniteLivedIntangibleAssetsAccumulatedAmortization	279714000	USD
CY2012Q4	us-gaap	Finite Lived Intangible Assets Accumulated Amortization FiniteLivedIntangibleAssetsAccumulatedAmortization	263107000	USD
CY2013Q1	us-gaap	Finite Lived Intangible Assets Net FiniteLivedIntangibleAssetsNet	445994000	USD
CY2013Q1	slg	Finite Lived Intangible Liabilities Gross FiniteLivedIntangibleLiabilitiesGross	652117000	USD
CY2012Q4	slg	Finite Lived Intangible Liabilities Gross FiniteLivedIntangibleLiabilitiesGross	651921000	USD
CY2013Q1	slg	Finite Lived Intangible Liabilities Accumulated Amortization FiniteLivedIntangibleLiabilitiesAccumulatedAmortization	374239000	USD
CY2012Q4	slg	Finite Lived Intangible Liabilities Accumulated Amortization FiniteLivedIntangibleLiabilitiesAccumulatedAmortization	357225000	USD
CY2013Q1	slg	Finite Lived Intangible Liabilities Net FiniteLivedIntangibleLiabilitiesNet	277878000	USD
CY2012Q4	slg	Finite Lived Intangible Liabilities Net FiniteLivedIntangibleLiabilitiesNet	294696000	USD
CY2013Q1	us-gaap	Accumulated Other Comprehensive Income Loss Available For Sale Securities Adjustment Net Of Tax AccumulatedOtherComprehensiveIncomeLossAvailableForSaleSecuritiesAdjustmentNetOfTax	5000000	USD
CY2012Q1	us-gaap	Provision For Loan Lease And Other Losses ProvisionForLoanLeaseAndOtherLosses	3000000	USD
CY2013Q1	us-gaap	Income Taxes Paid IncomeTaxesPaid	100000	USD
CY2012Q1	us-gaap	Income Taxes Paid IncomeTaxesPaid	0	USD
CY2013Q1	slg	Disposal Group Including Discontinued Operation Lease Revenue DisposalGroupIncludingDiscontinuedOperationLeaseRevenue	-10000	USD
CY2012Q1	slg	Disposal Group Including Discontinued Operation Tenant Reimbursements DisposalGroupIncludingDiscontinuedOperationTenantReimbursements	7000	USD
CY2013Q1	dei	Document Period End Date DocumentPeriodEndDate	2013-03-31
CY2013Q1	dei	Amendment Flag AmendmentFlag	false
CY2013Q1	dei	Current Fiscal Year End Date CurrentFiscalYearEndDate	--12-31
CY2013Q1	dei	Entity Current Reporting Status EntityCurrentReportingStatus	Yes
CY2013Q1	dei	Entity Filer Category EntityFilerCategory	Large Accelerated Filer
CY2013Q2	dei	Entity Common Stock Shares Outstanding EntityCommonStockSharesOutstanding	91597800	shares
CY2013Q1	dei	Document Fiscal Year Focus DocumentFiscalYearFocus	2013
CY2013Q1	dei	Document Fiscal Period Focus DocumentFiscalPeriodFocus	Q1
CY2013Q1	us-gaap	Disposal Group Including Discontinued Operation Revenue DisposalGroupIncludingDiscontinuedOperationRevenue	-10000	USD
CY2013Q1	us-gaap	Disposal Group Including Discontinued Operation Operating Expense DisposalGroupIncludingDiscontinuedOperationOperatingExpense	5000	USD
CY2013Q1	slg	Disposal Group Including Discontinued Operation Real Estate Tax Expense DisposalGroupIncludingDiscontinuedOperationRealEstateTaxExpense	10000	USD
CY2013Q1	slg	Disposal Group Including Discontinued Operation Depreciation And Amortization DisposalGroupIncludingDiscontinuedOperationDepreciationAndAmortization	7000	USD
CY2013Q1	slg	Disposal Group Including Discontinued Operation Total Costs And Expenses DisposalGroupIncludingDiscontinuedOperationTotalCostsAndExpenses	22000	USD
CY2012Q1	slg	Disposal Group Including Discontinued Operation Lease Revenue DisposalGroupIncludingDiscontinuedOperationLeaseRevenue	568000	USD
CY2012Q1	us-gaap	Disposal Group Including Discontinued Operation Revenue DisposalGroupIncludingDiscontinuedOperationRevenue	575000	USD
CY2012Q1	us-gaap	Disposal Group Including Discontinued Operation Operating Expense DisposalGroupIncludingDiscontinuedOperationOperatingExpense	11000	USD
CY2012Q1	slg	Disposal Group Including Discontinued Operation Real Estate Tax Expense DisposalGroupIncludingDiscontinuedOperationRealEstateTaxExpense	18000	USD
CY2012Q1	slg	Disposal Group Including Discontinued Operation Interest Expense Net DisposalGroupIncludingDiscontinuedOperationInterestExpenseNet	598000	USD
CY2012Q1	slg	Disposal Group Including Discontinued Operation Transaction Related Costs DisposalGroupIncludingDiscontinuedOperationTransactionRelatedCosts	95000	USD
CY2012Q1	slg	Disposal Group Including Discontinued Operation Depreciation And Amortization DisposalGroupIncludingDiscontinuedOperationDepreciationAndAmortization	14000	USD
CY2012Q1	slg	Disposal Group Including Discontinued Operation Total Costs And Expenses DisposalGroupIncludingDiscontinuedOperationTotalCostsAndExpenses	736000	USD
CY2013Q1	dei	Entity Registrant Name EntityRegistrantName	SL GREEN REALTY CORP
CY2013Q1	dei	Entity Central Index Key EntityCentralIndexKey	0001040971
CY2013Q1	dei	Document Type DocumentType	10-Q
CY2012Q4	us-gaap	Mortgage Loans On Real Estate Commercial And Consumer Net MortgageLoansOnRealEstateCommercialAndConsumerNet	1357203000	USD
CY2013Q1	us-gaap	Equity Method Investments EquityMethodInvestments	1073130000	USD
CY2012Q4	us-gaap	Equity Method Investments EquityMethodInvestments	1032243000	USD
CY2013Q1	us-gaap	Deferred Costs Current And Noncurrent DeferredCostsCurrentAndNoncurrent	252018000	USD
CY2013Q1	us-gaap	Land Land	2886099000	USD
CY2012Q4	us-gaap	Land Land	2886099000	USD
CY2013Q1	us-gaap	Investment Building And Building Improvements InvestmentBuildingAndBuildingImprovements	7452347000	USD
CY2012Q4	us-gaap	Investment Building And Building Improvements InvestmentBuildingAndBuildingImprovements	7389766000	USD
CY2013Q1	slg	Building Leasehold Improvements Gross BuildingLeaseholdImprovementsGross	1346481000	USD
CY2012Q4	slg	Building Leasehold Improvements Gross BuildingLeaseholdImprovementsGross	1346748000	USD
CY2013Q1	us-gaap	Capital Leased Assets Gross CapitalLeasedAssetsGross	47179000	USD
CY2012Q4	us-gaap	Capital Leased Assets Gross CapitalLeasedAssetsGross	40340000	USD
CY2013Q1	us-gaap	Real Estate Investment Property At Cost RealEstateInvestmentPropertyAtCost	11732106000	USD
CY2012Q4	us-gaap	Real Estate Investment Property At Cost RealEstateInvestmentPropertyAtCost	11662953000	USD
CY2013Q1	us-gaap	Real Estate Investment Property Accumulated Depreciation RealEstateInvestmentPropertyAccumulatedDepreciation	1461775000	USD
CY2012Q4	us-gaap	Real Estate Investment Property Accumulated Depreciation RealEstateInvestmentPropertyAccumulatedDepreciation	1393323000	USD
CY2013Q1	us-gaap	Real Estate Investment Property Net RealEstateInvestmentPropertyNet	10270331000	USD
CY2012Q4	us-gaap	Real Estate Investment Property Net RealEstateInvestmentPropertyNet	10269630000	USD
CY2012Q4	us-gaap	Assets Held For Sale At Carrying Value AssetsHeldForSaleAtCarryingValue	4901000	USD
CY2013Q1	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	220104000	USD
CY2012Q4	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	189984000	USD
CY2013Q1	us-gaap	Restricted Cash And Cash Equivalents RestrictedCashAndCashEquivalents	130233000	USD
CY2012Q4	us-gaap	Restricted Cash And Cash Equivalents RestrictedCashAndCashEquivalents	136071000	USD
CY2013Q1	us-gaap	Marketable Securities MarketableSecurities	22994000	USD
CY2012Q4	us-gaap	Marketable Securities MarketableSecurities	21429000	USD
CY2013Q1	us-gaap	Accounts And Notes Receivable Net AccountsAndNotesReceivableNet	41950000	USD
CY2012Q4	us-gaap	Accounts And Notes Receivable Net AccountsAndNotesReceivableNet	48544000	USD
CY2013Q1	us-gaap	Due From Related Parties DueFromRelatedParties	11169000	USD
CY2012Q4	us-gaap	Due From Related Parties DueFromRelatedParties	7531000	USD
CY2013Q1	us-gaap	Deferred Rent Receivables Net DeferredRentReceivablesNet	355250000	USD
CY2012Q4	us-gaap	Deferred Rent Receivables Net DeferredRentReceivablesNet	340747000	USD
CY2012Q4	us-gaap	Deferred Costs Current And Noncurrent DeferredCostsCurrentAndNoncurrent	261145000	USD
CY2013Q1	us-gaap	Other Assets OtherAssets	722952000	USD
CY2012Q4	us-gaap	Other Assets OtherAssets	718326000	USD
CY2013Q1	us-gaap	Assets Assets	14543965000	USD
CY2012Q4	us-gaap	Assets Assets	14387754000	USD
CY2013Q1	us-gaap	Secured Debt SecuredDebt	4815485000	USD
CY2012Q4	us-gaap	Secured Debt SecuredDebt	4615464000	USD
CY2013Q1	us-gaap	Line Of Credit LineOfCredit	30000000	USD
CY2012Q4	us-gaap	Line Of Credit LineOfCredit	70000000	USD
CY2013Q1	us-gaap	Senior Notes SeniorNotes	1732588000	USD
CY2012Q4	us-gaap	Senior Notes SeniorNotes	1734956000	USD
CY2013Q1	slg	Accrued Interest Payable And Other AccruedInterestPayableAndOther	73666000	USD
CY2012Q4	slg	Accrued Interest Payable And Other AccruedInterestPayableAndOther	73769000	USD
CY2013Q1	us-gaap	Accounts Payable And Accrued Liabilities Current And Noncurrent AccountsPayableAndAccruedLiabilitiesCurrentAndNoncurrent	143812000	USD
CY2012Q4	us-gaap	Accounts Payable And Accrued Liabilities Current And Noncurrent AccountsPayableAndAccruedLiabilitiesCurrentAndNoncurrent	159598000	USD
CY2013Q1	us-gaap	Deferred Revenue DeferredRevenue	322317000	USD
CY2012Q4	us-gaap	Deferred Revenue DeferredRevenue	321764000	USD
CY2013Q1	us-gaap	Capital Lease Obligations CapitalLeaseObligations	43404000	USD
CY2012Q4	us-gaap	Capital Lease Obligations CapitalLeaseObligations	37518000	USD
CY2013Q1	us-gaap	Deferred Rent Credit DeferredRentCredit	19750000	USD
CY2012Q4	us-gaap	Deferred Rent Credit DeferredRentCredit	20897000	USD
CY2013Q1	us-gaap	Dividends Payable Current And Noncurrent DividendsPayableCurrentAndNoncurrent	37737000	USD
CY2012Q4	us-gaap	Dividends Payable Current And Noncurrent DividendsPayableCurrentAndNoncurrent	37839000	USD
CY2013Q1	us-gaap	Security Deposit Liability SecurityDepositLiability	49803000	USD
CY2012Q4	us-gaap	Security Deposit Liability SecurityDepositLiability	46253000	USD
CY2012Q4	us-gaap	Liabilities Of Assets Held For Sale LiabilitiesOfAssetsHeldForSale	136000	USD
CY2013Q1	us-gaap	Junior Subordinated Debenture Owed To Unconsolidated Subsidiary Trust JuniorSubordinatedDebentureOwedToUnconsolidatedSubsidiaryTrust	100000000	USD
CY2012Q4	us-gaap	Junior Subordinated Debenture Owed To Unconsolidated Subsidiary Trust JuniorSubordinatedDebentureOwedToUnconsolidatedSubsidiaryTrust	100000000	USD
CY2013Q1	us-gaap	Liabilities Liabilities	7368562000	USD
CY2012Q4	us-gaap	Liabilities Liabilities	7218194000	USD
CY2013Q1	us-gaap	Commitments And Contingencies CommitmentsAndContingencies		USD
CY2012Q4	us-gaap	Commitments And Contingencies CommitmentsAndContingencies		USD
CY2013Q1	us-gaap	Minority Interest In Operating Partnerships MinorityInterestInOperatingPartnerships	220174000	USD
CY2012Q4	us-gaap	Minority Interest In Operating Partnerships MinorityInterestInOperatingPartnerships	212907000	USD
CY2013Q1	us-gaap	Common Stock Value CommonStockValue	953000	USD
CY2012Q4	us-gaap	Common Stock Value CommonStockValue	950000	USD
CY2013Q1	us-gaap	Additional Paid In Capital AdditionalPaidInCapital	4697528000	USD
CY2012Q4	us-gaap	Additional Paid In Capital AdditionalPaidInCapital	4667900000	USD
CY2013Q1	us-gaap	Treasury Stock Value TreasuryStockValue	322858000	USD
CY2012Q4	us-gaap	Treasury Stock Value TreasuryStockValue	322858000	USD
CY2013Q1	us-gaap	Accumulated Other Comprehensive Income Loss Net Of Tax AccumulatedOtherComprehensiveIncomeLossNetOfTax	-26117000	USD
CY2012Q4	us-gaap	Accumulated Other Comprehensive Income Loss Net Of Tax AccumulatedOtherComprehensiveIncomeLossNetOfTax	-29587000	USD
CY2013Q1	us-gaap	Retained Earnings Accumulated Deficit RetainedEarningsAccumulatedDeficit	1665468000	USD
CY2012Q4	us-gaap	Retained Earnings Accumulated Deficit RetainedEarningsAccumulatedDeficit	1701092000	USD
CY2013Q1	us-gaap	Stockholders Equity StockholdersEquity	6417246000	USD
CY2012Q4	us-gaap	Stockholders Equity StockholdersEquity	6419802000	USD
CY2013Q1	us-gaap	Other Minority Interests OtherMinorityInterests	488433000	USD
CY2012Q4	us-gaap	Other Minority Interests OtherMinorityInterests	487301000	USD
CY2013Q1	us-gaap	Stockholders Equity Including Portion Attributable To Noncontrolling Interest StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest	6905679000	USD
CY2012Q4	us-gaap	Stockholders Equity Including Portion Attributable To Noncontrolling Interest StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest	6907103000	USD
CY2013Q1	us-gaap	Liabilities And Stockholders Equity LiabilitiesAndStockholdersEquity	14543965000	USD
CY2012Q4	us-gaap	Liabilities And Stockholders Equity LiabilitiesAndStockholdersEquity	14387754000	USD
CY2013Q1	us-gaap	Gains Losses On Extinguishment Of Debt GainsLossesOnExtinguishmentOfDebt	-18513000	USD
CY2013Q1	us-gaap	Allowance For Doubtful Accounts Premiums And Other Receivables AllowanceForDoubtfulAccountsPremiumsAndOtherReceivables	20947000	USD
CY2012Q4	us-gaap	Allowance For Doubtful Accounts Premiums And Other Receivables AllowanceForDoubtfulAccountsPremiumsAndOtherReceivables	21652000	USD
CY2013Q1	slg	Allowance For Deferred Rents Receivable AllowanceForDeferredRentsReceivable	28475000	USD
CY2012Q4	slg	Allowance For Deferred Rents Receivable AllowanceForDeferredRentsReceivable	29580000	USD
CY2013Q1	slg	Discount Of Structured Finance Investments DiscountOfStructuredFinanceInvestments	11251000	USD
CY2012Q4	slg	Discount Of Structured Finance Investments DiscountOfStructuredFinanceInvestments	13572000	USD
CY2013Q1	us-gaap	Allowance For Loan And Lease Losses Real Estate AllowanceForLoanAndLeaseLossesRealEstate	7000000	USD
CY2012Q4	us-gaap	Allowance For Loan And Lease Losses Real Estate AllowanceForLoanAndLeaseLossesRealEstate	7000000	USD
CY2013Q1	us-gaap	Common Stock Par Or Stated Value Per Share CommonStockParOrStatedValuePerShare	0.01
CY2012Q4	us-gaap	Common Stock Par Or Stated Value Per Share CommonStockParOrStatedValuePerShare	0.01
CY2013Q1	us-gaap	Common Stock Shares Authorized CommonStockSharesAuthorized	160000000	shares
CY2012Q4	us-gaap	Common Stock Shares Authorized CommonStockSharesAuthorized	160000000	shares
CY2013Q1	us-gaap	Common Stock Shares Issued CommonStockSharesIssued	95201000	shares
CY2013Q1	us-gaap	Common Stock Shares Outstanding CommonStockSharesOutstanding	95201000	shares
CY2012Q4	us-gaap	Common Stock Shares Issued CommonStockSharesIssued	94896000	shares
CY2012Q4	us-gaap	Common Stock Shares Outstanding CommonStockSharesOutstanding	94896000	shares
CY2013Q1	us-gaap	Treasury Stock Shares TreasuryStockShares	3646000	shares
CY2012Q4	us-gaap	Treasury Stock Shares TreasuryStockShares	3646000	shares
CY2013Q1	us-gaap	Operating Leases Income Statement Minimum Lease Revenue OperatingLeasesIncomeStatementMinimumLeaseRevenue	270489000	USD
CY2012Q1	us-gaap	Operating Leases Income Statement Minimum Lease Revenue OperatingLeasesIncomeStatementMinimumLeaseRevenue	260762000	USD
CY2013Q1	us-gaap	Tenant Reimbursements TenantReimbursements	41000000	USD
CY2012Q1	us-gaap	Tenant Reimbursements TenantReimbursements	41656000	USD
CY2013Q1	us-gaap	Investment Income Interest And Dividend InvestmentIncomeInterestAndDividend	52708000	USD
CY2012Q1	us-gaap	Investment Income Interest And Dividend InvestmentIncomeInterestAndDividend	26338000	USD
CY2013Q1	us-gaap	Other Income OtherIncome	5774000	USD
CY2012Q1	us-gaap	Other Income OtherIncome	10377000	USD
CY2013Q1	us-gaap	Revenues Revenues	369971000	USD
CY2012Q1	us-gaap	Revenues Revenues	339133000	USD
CY2013Q1	us-gaap	Costs And Expenses CostsAndExpenses	73633000	USD
CY2012Q1	us-gaap	Costs And Expenses CostsAndExpenses	73254000	USD
CY2013Q1	us-gaap	Real Estate Tax Expense RealEstateTaxExpense	53688000	USD
CY2012Q1	us-gaap	Real Estate Tax Expense RealEstateTaxExpense	51480000	USD
CY2013Q1	us-gaap	Direct Costs Of Leased And Rented Property Or Equipment DirectCostsOfLeasedAndRentedPropertyOrEquipment	10990000	USD
CY2012Q1	us-gaap	Direct Costs Of Leased And Rented Property Or Equipment DirectCostsOfLeasedAndRentedPropertyOrEquipment	8806000	USD
CY2013Q1	slg	Interest Expense Net InterestExpenseNet	81336000	USD
CY2012Q1	slg	Interest Expense Net InterestExpenseNet	80137000	USD
CY2013Q1	us-gaap	Amortization Of Financing Costs AmortizationOfFinancingCosts	4463000	USD
CY2012Q1	us-gaap	Amortization Of Financing Costs AmortizationOfFinancingCosts	3580000	USD
CY2013Q1	us-gaap	Depreciation And Amortization DepreciationAndAmortization	80683000	USD
CY2012Q1	us-gaap	Depreciation And Amortization DepreciationAndAmortization	77069000	USD
CY2012Q1	us-gaap	Provision For Loan And Lease Losses ProvisionForLoanAndLeaseLosses	564000	USD
CY2013Q1	slg	Transaction Related Costs TransactionRelatedCosts	1358000	USD
CY2012Q1	slg	Transaction Related Costs TransactionRelatedCosts	1056000	USD
CY2013Q1	us-gaap	Selling General And Administrative Expense SellingGeneralAndAdministrativeExpense	21067000	USD
CY2012Q1	us-gaap	Selling General And Administrative Expense SellingGeneralAndAdministrativeExpense	20196000	USD
CY2013Q1	slg	Total Costs And Expenses Including Nonoperating Income Expense TotalCostsAndExpensesIncludingNonoperatingIncomeExpense	327218000	USD
CY2012Q1	slg	Total Costs And Expenses Including Nonoperating Income Expense TotalCostsAndExpensesIncludingNonoperatingIncomeExpense	316142000	USD
CY2013Q1	us-gaap	Income Loss From Continuing Operations Before Income Taxes Minority Interest And Income Loss From Equity Method Investments IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments	42753000	USD
CY2012Q1	us-gaap	Income Loss From Continuing Operations Before Income Taxes Minority Interest And Income Loss From Equity Method Investments IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments	22991000	USD
CY2013Q1	us-gaap	Income Loss From Equity Method Investments IncomeLossFromEquityMethodInvestments	5073000	USD
CY2012Q1	us-gaap	Income Loss From Equity Method Investments IncomeLossFromEquityMethodInvestments	-1560000	USD
CY2012Q1	us-gaap	Equity Method Investment Realized Gain Loss On Disposal EquityMethodInvestmentRealizedGainLossOnDisposal	7260000	USD
CY2013Q1	us-gaap	Marketable Securities Gain Loss MarketableSecuritiesGainLoss	-57000	USD
CY2013Q1	slg	Other Comprehensive Income Of Joint Venture Unrealized Gain Loss On Derivatives Arising During Period Net Of Tax OtherComprehensiveIncomeOfJointVentureUnrealizedGainLossOnDerivativesArisingDuringPeriodNetOfTax	221000	USD
CY2012Q1	slg	Other Comprehensive Income Of Joint Venture Unrealized Gain Loss On Derivatives Arising During Period Net Of Tax OtherComprehensiveIncomeOfJointVentureUnrealizedGainLossOnDerivativesArisingDuringPeriodNetOfTax	58000	USD
CY2013Q1	us-gaap	Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Net Of Tax OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodNetOfTax	1641000	USD
CY2013Q1	us-gaap	Income Loss From Continuing Operations Including Portion Attributable To Noncontrolling Interest IncomeLossFromContinuingOperationsIncludingPortionAttributableToNoncontrollingInterest	29256000	USD
CY2012Q1	us-gaap	Income Loss From Continuing Operations Including Portion Attributable To Noncontrolling Interest IncomeLossFromContinuingOperationsIncludingPortionAttributableToNoncontrollingInterest	28691000	USD
CY2013Q1	us-gaap	Discontinued Operation Income Loss From Discontinued Operation During Phase Out Period Net Of Tax DiscontinuedOperationIncomeLossFromDiscontinuedOperationDuringPhaseOutPeriodNetOfTax	-32000	USD
CY2012Q1	us-gaap	Discontinued Operation Income Loss From Discontinued Operation During Phase Out Period Net Of Tax DiscontinuedOperationIncomeLossFromDiscontinuedOperationDuringPhaseOutPeriodNetOfTax	-161000	USD
CY2013Q1	us-gaap	Discontinued Operation Gain Loss On Disposal Of Discontinued Operation Net Of Tax DiscontinuedOperationGainLossOnDisposalOfDiscontinuedOperationNetOfTax	1113000	USD
CY2012Q1	us-gaap	Discontinued Operation Gain Loss On Disposal Of Discontinued Operation Net Of Tax DiscontinuedOperationGainLossOnDisposalOfDiscontinuedOperationNetOfTax	6627000	USD
CY2013Q1	us-gaap	Profit Loss ProfitLoss	30337000	USD
CY2012Q1	us-gaap	Profit Loss ProfitLoss	35157000	USD
CY2013Q1	us-gaap	Minority Interest In Net Income Loss Operating Partnerships MinorityInterestInNetIncomeLossOperatingPartnerships	555000	USD
CY2012Q1	us-gaap	Minority Interest In Net Income Loss Operating Partnerships MinorityInterestInNetIncomeLossOperatingPartnerships	888000	USD
CY2013Q1	us-gaap	Minority Interest In Net Income Loss Other Minority Interests MinorityInterestInNetIncomeLossOtherMinorityInterests	2901000	USD
CY2012Q1	us-gaap	Minority Interest In Net Income Loss Other Minority Interests MinorityInterestInNetIncomeLossOtherMinorityInterests	1071000	USD
CY2013Q1	slg	Preferred Units Distributions PreferredUnitsDistributions	565000	USD
CY2012Q1	slg	Preferred Units Distributions PreferredUnitsDistributions	397000	USD
CY2013Q1	us-gaap	Net Income Loss NetIncomeLoss	26316000	USD
CY2012Q1	us-gaap	Net Income Loss NetIncomeLoss	32801000	USD
CY2013Q1	us-gaap	Dividends Preferred Stock DividendsPreferredStock	7407000	USD
CY2012Q1	us-gaap	Dividends Preferred Stock DividendsPreferredStock	7545000	USD
CY2013Q1	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	18909000	USD
CY2012Q1	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	25256000	USD
CY2013Q1	us-gaap	Income Loss From Continuing Operations IncomeLossFromContinuingOperations	17859000	USD
CY2012Q1	us-gaap	Income Loss From Continuing Operations IncomeLossFromContinuingOperations	11997000	USD
CY2012Q1	slg	Gain Loss On Sale Of Unconsolidated Joint Ventures Or Real Estate GainLossOnSaleOfUnconsolidatedJointVenturesOrRealEstate	7014000	USD
CY2013Q1	slg	Discontinued Operation Income Loss From Discontinued Operation During Phase Out Period Net Of Tax Attributable To Parent DiscontinuedOperationIncomeLossFromDiscontinuedOperationDuringPhaseOutPeriodNetOfTaxAttributableToParent	-31000	USD
CY2012Q1	slg	Discontinued Operation Income Loss From Discontinued Operation During Phase Out Period Net Of Tax Attributable To Parent DiscontinuedOperationIncomeLossFromDiscontinuedOperationDuringPhaseOutPeriodNetOfTaxAttributableToParent	-157000	USD
CY2013Q1	slg	Gain Loss On Sale Of Discontinued Operations GainLossOnSaleOfDiscontinuedOperations	1081000	USD
CY2012Q1	slg	Gain Loss On Sale Of Discontinued Operations GainLossOnSaleOfDiscontinuedOperations	6402000	USD
CY2013Q1	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	91399000	shares
CY2012Q1	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	86744000	shares
CY2013Q1	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	94302000	shares
CY2012Q1	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	90173000	shares
CY2013Q1	us-gaap	Income Loss From Continuing Operations Per Basic Share IncomeLossFromContinuingOperationsPerBasicShare	0.20
CY2013Q1	slg	Gain Loss On Sale Of Discontinued Operations Net Of Noncontrolling Interest Per Basic Share GainLossOnSaleOfDiscontinuedOperationsNetOfNoncontrollingInterestPerBasicShare	0.01
CY2013Q1	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.21
CY2012Q1	us-gaap	Income Loss From Continuing Operations Per Basic Share IncomeLossFromContinuingOperationsPerBasicShare	0.14
CY2012Q1	slg	Gain Loss On Sale Of Unconsolidated Joint Ventures Or Real Estate Per Basic Share GainLossOnSaleOfUnconsolidatedJointVenturesOrRealEstatePerBasicShare	0.08
CY2012Q1	slg	Gain Loss On Sale Of Discontinued Operations Net Of Noncontrolling Interest Per Basic Share GainLossOnSaleOfDiscontinuedOperationsNetOfNoncontrollingInterestPerBasicShare	0.07
CY2012Q1	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.29
CY2013Q1	us-gaap	Income Loss From Continuing Operations Per Diluted Share IncomeLossFromContinuingOperationsPerDilutedShare	0.20
CY2012Q1	us-gaap	Income Loss From Continuing Operations Per Diluted Share IncomeLossFromContinuingOperationsPerDilutedShare	0.14
CY2012Q1	slg	Gain Loss On Sale Of Unconsolidated Joint Ventures Or Real Estate Per Diluted Share GainLossOnSaleOfUnconsolidatedJointVenturesOrRealEstatePerDilutedShare	0.08
CY2013Q1	slg	Gain Loss On Sale Of Discontinued Operations Per Diluted Share GainLossOnSaleOfDiscontinuedOperationsPerDilutedShare	0.01
CY2012Q1	slg	Gain Loss On Sale Of Discontinued Operations Per Diluted Share GainLossOnSaleOfDiscontinuedOperationsPerDilutedShare	0.07
CY2013Q1	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.21
CY2012Q1	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.29
CY2013Q1	us-gaap	Affiliate Costs AffiliateCosts	4150000	USD
CY2012Q1	us-gaap	Affiliate Costs AffiliateCosts	3471000	USD
CY2013Q1	us-gaap	Other Comprehensive Income Unrealized Gain Loss On Derivatives Arising During Period Net Of Tax OtherComprehensiveIncomeUnrealizedGainLossOnDerivativesArisingDuringPeriodNetOfTax	-41000	USD
CY2012Q1	us-gaap	Other Comprehensive Income Unrealized Gain Loss On Derivatives Arising During Period Net Of Tax OtherComprehensiveIncomeUnrealizedGainLossOnDerivativesArisingDuringPeriodNetOfTax	-146000	USD
CY2012Q1	us-gaap	Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Net Of Tax OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodNetOfTax	770000	USD
CY2013Q1	us-gaap	Other Comprehensive Income Loss Net Of Tax OtherComprehensiveIncomeLossNetOfTax	3529000	USD
CY2012Q1	us-gaap	Other Comprehensive Income Loss Net Of Tax OtherComprehensiveIncomeLossNetOfTax	3885000	USD
CY2013Q1	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	-174490000	USD
CY2013Q1	slg	Deferred Loan Costs And Capitalized Lease Obligation DeferredLoanCostsAndCapitalizedLeaseObligation	8677000	USD
CY2013Q1	us-gaap	Cash And Cash Equivalents Period Increase Decrease CashAndCashEquivalentsPeriodIncreaseDecrease	30120000	USD
CY2011Q4	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	138192000	USD
CY2013Q1	us-gaap	Comprehensive Income Net Of Tax Including Portion Attributable To Noncontrolling Interest ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest	33866000	USD
CY2012Q1	us-gaap	Comprehensive Income Net Of Tax Including Portion Attributable To Noncontrolling Interest ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest	39042000	USD
CY2013Q1	us-gaap	Net Income Loss Attributable To Noncontrolling Interest NetIncomeLossAttributableToNoncontrollingInterest	4021000	USD
CY2012Q1	us-gaap	Net Income Loss Attributable To Noncontrolling Interest NetIncomeLossAttributableToNoncontrollingInterest	2356000	USD
CY2013Q1	us-gaap	Other Comprehensive Income Loss Net Of Tax Portion Attributable To Noncontrolling Interest OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToNoncontrollingInterest	59000	USD
CY2012Q1	us-gaap	Other Comprehensive Income Loss Net Of Tax Portion Attributable To Noncontrolling Interest OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToNoncontrollingInterest	-184000	USD
CY2013Q1	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	29786000	USD
CY2012Q1	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	36870000	USD
CY2013Q1	us-gaap	Common Stock Dividends Per Share Declared CommonStockDividendsPerShareDeclared	0.33
CY2012Q1	us-gaap	Common Stock Dividends Per Share Declared CommonStockDividendsPerShareDeclared	0.25
CY2013Q1	us-gaap	Depreciation Depletion And Amortization DepreciationDepletionAndAmortization	85146000	USD
CY2012Q1	us-gaap	Depreciation Depletion And Amortization DepreciationDepletionAndAmortization	80663000	USD
CY2012Q1	us-gaap	Equity Method Investment Dividends Or Distributions EquityMethodInvestmentDividendsOrDistributions	4408000	USD
CY2012Q1	us-gaap	Straight Line Rent StraightLineRent	21123000	USD
CY2012Q1	us-gaap	Other Noncash Income Expense OtherNoncashIncomeExpense	-5554000	USD
CY2012Q1	us-gaap	Increase Decrease In Restricted Cash For Operating Activities IncreaseDecreaseInRestrictedCashForOperatingActivities	12771000	USD
CY2012Q1	us-gaap	Increase Decrease In Accounts Receivable IncreaseDecreaseInAccountsReceivable	-14000	USD
CY2012Q1	us-gaap	Increase Decrease In Due From Related Parties Current IncreaseDecreaseInDueFromRelatedPartiesCurrent	3664000	USD
CY2012Q1	us-gaap	Increase Decrease In Deferred Leasing Fees IncreaseDecreaseInDeferredLeasingFees	7152000	USD
CY2012Q1	us-gaap	Increase Decrease In Other Operating Assets IncreaseDecreaseInOtherOperatingAssets	24230000	USD
CY2012Q1	slg	Increase Decrease In Accrued Liabilities And Other IncreaseDecreaseInAccruedLiabilitiesAndOther	4118000	USD
CY2012Q1	us-gaap	Increase Decrease In Deferred Liabilities IncreaseDecreaseInDeferredLiabilities	7620000	USD
CY2012Q1	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	56831000	USD
CY2012Q1	us-gaap	Payments To Acquire Real Estate PaymentsToAcquireRealEstate	145558000	USD
CY2012Q1	us-gaap	Payments To Acquire Productive Assets PaymentsToAcquireProductiveAssets	32561000	USD
CY2012Q1	us-gaap	Increase Decrease In Restricted Cash IncreaseDecreaseInRestrictedCash	1533000	USD
CY2012Q1	us-gaap	Payments To Acquire Equity Method Investments PaymentsToAcquireEquityMethodInvestments	105633000	USD
CY2012Q1	us-gaap	Proceeds From Real Estate And Real Estate Joint Ventures ProceedsFromRealEstateAndRealEstateJointVentures	23088000	USD
CY2012Q1	us-gaap	Payments To Acquire Other Investments PaymentsToAcquireOtherInvestments	40016000	USD
CY2012Q1	us-gaap	Proceeds From Sale And Maturity Of Other Investments ProceedsFromSaleAndMaturityOfOtherInvestments	-8631000	USD
CY2012Q1	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	-294192000	USD
CY2012Q1	us-gaap	Proceeds From Issuance Of Secured Debt ProceedsFromIssuanceOfSecuredDebt	108500000	USD
CY2012Q1	us-gaap	Repayments Of Secured Debt RepaymentsOfSecuredDebt	13526000	USD
CY2012Q1	us-gaap	Proceeds From Other Debt ProceedsFromOtherDebt	300000000	USD
CY2012Q1	us-gaap	Repayments Of Other Debt RepaymentsOfOtherDebt	352454000	USD
CY2012Q1	us-gaap	Proceeds From Stock Options Exercised ProceedsFromStockOptionsExercised	102089000	USD
CY2012Q1	us-gaap	Proceeds From Issuance Of Common Stock ProceedsFromIssuanceOfCommonStock	122953000	USD
CY2012Q1	us-gaap	Payments For Repurchase Of Common Stock PaymentsForRepurchaseOfCommonStock	11158000	USD
CY2012Q1	slg	Distributions To Noncontrolling Interests Other Partnerships DistributionsToNoncontrollingInterestsOtherPartnerships	7117000	USD
CY2012Q1	slg	Proceeds From Noncontrolling Interests In Other Partnerships ProceedsFromNoncontrollingInterestsInOtherPartnerships	18331000	USD
CY2012Q1	slg	Distribution To Noncontrolling Interest Operating Partnership DistributionToNoncontrollingInterestOperatingPartnership	762000	USD
CY2012Q1	us-gaap	Payments Of Dividends PaymentsOfDividends	28453000	USD
CY2012Q1	slg	Deferred Loan Costs And Capitalized Lease Obligation DeferredLoanCostsAndCapitalizedLeaseObligation	5569000	USD
CY2012Q1	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	232834000	USD
CY2012Q1	us-gaap	Cash And Cash Equivalents Period Increase Decrease CashAndCashEquivalentsPeriodIncreaseDecrease	-4527000	USD
CY2012Q1	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	133665000	USD
CY2013Q1	slg	Profit Loss Less Minority Interest In Net Income Loss Operating Partnerships ProfitLossLessMinorityInterestInNetIncomeLossOperatingPartnerships	29217000	USD
CY2013Q1	us-gaap	Other Comprehensive Income Loss Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent	3470000	USD
CY2013Q1	us-gaap	Stock Issued During Period Value Dividend Reinvestment Plan StockIssuedDuringPeriodValueDividendReinvestmentPlan	13000	USD
CY2013Q1	us-gaap	Stock Issued During Period Value Conversion Of Units StockIssuedDuringPeriodValueConversionOfUnits	17287000	USD
CY2013Q1	slg	Reallocation Minority Interest In Operating Partnerships ReallocationMinorityInterestInOperatingPartnerships	24016000	USD
CY2013Q1	us-gaap	Adjustments To Additional Paid In Capital Sharebased Compensation Requisite Service Period Recognition Value AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue	7822000	USD
CY2013Q1	us-gaap	Stock Issued During Period Value Stock Options Exercised StockIssuedDuringPeriodValueStockOptionsExercised	4533000	USD
CY2013Q1	slg	Consolidation Of Joint Venture Interest ConsolidationOfJointVentureInterest	3110000	USD
CY2013Q1	us-gaap	Minority Interest Decrease From Distributions To Noncontrolling Interest Holders MinorityInterestDecreaseFromDistributionsToNoncontrollingInterestHolders	4879000	USD
CY2013Q1	us-gaap	Dividends Common Stock DividendsCommonStock	30517000	USD
CY2013Q1	slg	Mortgage Loans On Real Estate Period Increase MortgageLoansOnRealEstatePeriodIncrease	208600000	USD
CY2012Q1	slg	Mortgage Loans On Real Estate Period Increase MortgageLoansOnRealEstatePeriodIncrease	76300000	USD
CY2013Q1	slg	Mortgage Loans On Real Estate Period Decrease MortgageLoansOnRealEstatePeriodDecrease	121900000	USD
CY2012Q1	slg	Mortgage Loans On Real Estate Period Decrease MortgageLoansOnRealEstatePeriodDecrease	59700000	USD
CY2013Q1	us-gaap	Provision For Doubtful Accounts ProvisionForDoubtfulAccounts	0	USD
CY2012Q1	us-gaap	Provision For Doubtful Accounts ProvisionForDoubtfulAccounts	3000000	USD
CY2013Q1	us-gaap	Mortgage Loans On Real Estate Interest Rate MortgageLoansOnRealEstateInterestRate	0.111	pure
CY2013Q1	slg	Mortgage Loans On Real Estate Senior Debt On Investment MortgageLoansOnRealEstateSeniorDebtOnInvestment	4073528000	USD
CY2011Q4	us-gaap	Allowance For Loan And Lease Losses Real Estate AllowanceForLoanAndLeaseLossesRealEstate	50175000	USD
CY2012	us-gaap	Provision For Loan Lease And Other Losses ProvisionForLoanLeaseAndOtherLosses	3000000	USD
CY2012	us-gaap	Financing Receivable Allowance For Credit Losses Recovery FinancingReceivableAllowanceForCreditLossesRecovery	2436000	USD
CY2012	slg	Financing Receivable Allowance For Credit Losses Write Offs And Reclassifications FinancingReceivableAllowanceForCreditLossesWriteOffsAndReclassifications	43739000	USD
CY2012	slg	Financing Receivable Portfolio Segments Number FinancingReceivablePortfolioSegmentsNumber	1	segment
CY2013Q1	slg	Financing Receivable Portfolio Segments Number FinancingReceivablePortfolioSegmentsNumber	1	segment
CY2012Q4	slg	Financing Receivable Recorded In Other Assets FinancingReceivableRecordedInOtherAssets	121300000	USD
CY2013Q1	slg	Financing Receivable Recorded In Other Assets FinancingReceivableRecordedInOtherAssets	129000000	USD
CY2013Q1	us-gaap	Impaired Financing Receivable Average Recorded Investment ImpairedFinancingReceivableAverageRecordedInvestment	10864000	USD
CY2012Q1	us-gaap	Impaired Financing Receivable Average Recorded Investment ImpairedFinancingReceivableAverageRecordedInvestment	79937000	USD
CY2013Q1	slg	Impaired Financing Receivable Investment Income ImpairedFinancingReceivableInvestmentIncome	227000	USD
CY2012Q1	slg	Impaired Financing Receivable Investment Income ImpairedFinancingReceivableInvestmentIncome	1562000	USD
CY2013Q1	slg	Variable Interest Entity Not Primary Beneficiary Number VariableInterestEntityNotPrimaryBeneficiaryNumber	3	entity
CY2012Q4	slg	Variable Interest Entity Not Primary Beneficiary Investment VariableInterestEntityNotPrimaryBeneficiaryInvestment	117700000	USD
CY2013Q1	slg	Variable Interest Entity Not Primary Beneficiary Investment VariableInterestEntityNotPrimaryBeneficiaryInvestment	124500000	USD
CY2013Q1	us-gaap	Deferred Finance Costs Gross DeferredFinanceCostsGross	148662000	USD
CY2013Q1	us-gaap	Deferred Costs Leasing Gross DeferredCostsLeasingGross	289678000	USD
CY2013Q1	slg	Deferred Costs Gross DeferredCostsGross	438340000	USD
CY2013Q1	slg	Accumulated Amortization Of Deferred Costs AccumulatedAmortizationOfDeferredCosts	186322000	USD
CY2012Q4	slg	Accumulated Amortization Of Deferred Costs AccumulatedAmortizationOfDeferredCosts	177382000	USD
CY2012Q4	slg	Deferred Costs Gross DeferredCostsGross	438527000	USD
CY2012Q4	us-gaap	Deferred Costs Leasing Gross DeferredCostsLeasingGross	285931000	USD
CY2012Q4	us-gaap	Deferred Finance Costs Gross DeferredFinanceCostsGross	152596000	USD
CY2013Q1	slg	Secured Debt Bearing Fixed Interest Amount SecuredDebtBearingFixedInterestAmount	4349406000	USD
CY2012Q4	slg	Secured Debt Bearing Fixed Interest Amount SecuredDebtBearingFixedInterestAmount	3457769000	USD
CY2013Q1	slg	Secured Debt Bearing Variable Interest Amount SecuredDebtBearingVariableInterestAmount	466079000	USD
CY2012Q4	slg	Secured Debt Bearing Variable Interest Amount SecuredDebtBearingVariableInterestAmount	1157695000	USD
CY2013Q1	us-gaap	Pledged Assets Not Separately Reported Real Estate PledgedAssetsNotSeparatelyReportedRealEstate	7800000000	USD
CY2012Q4	us-gaap	Pledged Assets Not Separately Reported Real Estate PledgedAssetsNotSeparatelyReportedRealEstate	7600000000	USD
CY2013Q1	slg	Secured Debt And Other Loans Payable SecuredDebtAndOtherLoansPayable	4815485000	USD
CY2012Q4	slg	Secured Debt And Other Loans Payable SecuredDebtAndOtherLoansPayable	4615464000	USD
CY2013Q1	us-gaap	Longterm Debt Percentage Bearing Fixed Interest Amount LongtermDebtPercentageBearingFixedInterestAmount	5800000000	USD
CY2013Q1	us-gaap	Longterm Debt Percentage Bearing Variable Interest Amount LongtermDebtPercentageBearingVariableInterestAmount	900000000	USD
CY2012Q4	us-gaap	Due From Joint Ventures DueFromJointVentures	511000	USD
CY2012Q4	us-gaap	Due From Other Related Parties DueFromOtherRelatedParties	7020000	USD
CY2012Q4	slg	Due To Joint Ventures DueToJointVentures	8401000	USD
CY2013Q1	us-gaap	Due From Joint Ventures DueFromJointVentures	4032000	USD
CY2013Q1	us-gaap	Due From Other Related Parties DueFromOtherRelatedParties	7137000	USD
CY2013Q1	slg	Total Shares Authorized TotalSharesAuthorized	260000000	shares
CY2013Q1	slg	Total Par Or Stated Value Per Share TotalParOrStatedValuePerShare	0.01
CY2013Q1	us-gaap	Excess Stock Shares Authorized ExcessStockSharesAuthorized	75000000	shares
CY2013Q1	slg	Excess Stock Par Or Stated Value Per Share ExcessStockParOrStatedValuePerShare	0.01
CY2013Q1	us-gaap	Preferred Stock Shares Authorized PreferredStockSharesAuthorized	25000000	shares
CY2013Q1	us-gaap	Equity Method Investment Dividends Or Distributions EquityMethodInvestmentDividendsOrDistributions	6901000	USD
CY2013Q1	us-gaap	Shares Outstanding SharesOutstanding	91555082	shares
CY2013Q1	us-gaap	Employee Service Share Based Compensation Allocation Of Recognized Period Costs Capitalized Amount EmployeeServiceShareBasedCompensationAllocationOfRecognizedPeriodCostsCapitalizedAmount	1000000	USD
CY2012Q1	us-gaap	Employee Service Share Based Compensation Allocation Of Recognized Period Costs Capitalized Amount EmployeeServiceShareBasedCompensationAllocationOfRecognizedPeriodCostsCapitalizedAmount	1000000	USD
CY2013Q1	us-gaap	Straight Line Rent StraightLineRent	13923000	USD
CY2013Q1	us-gaap	Other Noncash Income Expense OtherNoncashIncomeExpense	22115000	USD
CY2013Q1	slg	Operating Leases Minimum Lease Term OperatingLeasesMinimumLeaseTerm	P1Y
CY2013Q1	us-gaap	Capital Leases Future Minimum Payments Due In Two Years CapitalLeasesFutureMinimumPaymentsDueInTwoYears	2268000	USD
CY2013Q1	us-gaap	Capital Leases Future Minimum Payments Due In Three Years CapitalLeasesFutureMinimumPaymentsDueInThreeYears	2339000	USD
CY2013Q1	us-gaap	Capital Leases Future Minimum Payments Due In Four Years CapitalLeasesFutureMinimumPaymentsDueInFourYears	2480000	USD
CY2013Q1	us-gaap	Capital Leases Future Minimum Payments Due In Five Years CapitalLeasesFutureMinimumPaymentsDueInFiveYears	2630000	USD
CY2013Q1	us-gaap	Capital Leases Future Minimum Payments Due Thereafter CapitalLeasesFutureMinimumPaymentsDueThereafter	353908000	USD
CY2013Q1	us-gaap	Capital Leases Future Minimum Payments Due CapitalLeasesFutureMinimumPaymentsDue	365214000	USD
CY2013Q1	us-gaap	Capital Leases Future Minimum Payments Interest Included In Payments CapitalLeasesFutureMinimumPaymentsInterestIncludedInPayments	321810000	USD
CY2013Q1	us-gaap	Capital Leases Future Minimum Payments Present Value Of Net Minimum Payments CapitalLeasesFutureMinimumPaymentsPresentValueOfNetMinimumPayments	43404000	USD
CY2013Q1	us-gaap	Operating Leases Future Minimum Payments Due In Two Years OperatingLeasesFutureMinimumPaymentsDueInTwoYears	35412000	USD
CY2013Q1	us-gaap	Operating Leases Future Minimum Payments Due In Three Years OperatingLeasesFutureMinimumPaymentsDueInThreeYears	35568000	USD
CY2013Q1	us-gaap	Operating Leases Future Minimum Payments Due In Four Years OperatingLeasesFutureMinimumPaymentsDueInFourYears	35985000	USD
CY2013Q1	us-gaap	Operating Leases Future Minimum Payments Due In Five Years OperatingLeasesFutureMinimumPaymentsDueInFiveYears	36231000	USD
CY2013Q1	us-gaap	Operating Leases Future Minimum Payments Due Thereafter OperatingLeasesFutureMinimumPaymentsDueThereafter	1188068000	USD
CY2013Q1	us-gaap	Operating Leases Future Minimum Payments Due OperatingLeasesFutureMinimumPaymentsDue	1357748000	USD
CY2012Q1	slg	Selling General And Administrative Expense And Transaction Related Costs SellingGeneralAndAdministrativeExpenseAndTransactionRelatedCosts	21300000	USD
CY2012Q1	us-gaap	Deferred Compensation Arrangement With Individual Fair Value Of Shares Issued DeferredCompensationArrangementWithIndividualFairValueOfSharesIssued	473000	USD
CY2013Q1	us-gaap	Incremental Common Shares Attributable To Share Based Payment Arrangements IncrementalCommonSharesAttributableToShareBasedPaymentArrangements	216000	shares
CY2012Q1	us-gaap	Incremental Common Shares Attributable To Share Based Payment Arrangements IncrementalCommonSharesAttributableToShareBasedPaymentArrangements	380000	shares
CY2013Q1	us-gaap	Derivative Fair Value Of Derivative Liability DerivativeFairValueOfDerivativeLiability	1800000	USD
CY2013Q1	slg	Accumulated Other Comprehensive Income Loss Gain Loss On Settlement Of Derivatives AccumulatedOtherComprehensiveIncomeLossGainLossOnSettlementOfDerivatives	-16400000	USD
CY2013Q1	slg	Accumulated Other Comprehensive Income Loss Derivative Contracts Held And Entitys Share Of Joint Venture Aoci AccumulatedOtherComprehensiveIncomeLossDerivativeContractsHeldAndEntitysShareOfJointVentureAOCI	-14700000	USD
CY2010Q1	slg	Gain Loss On Termination Of Derivative GainLossOnTerminationOfDerivative	-19500000	USD
CY2010Q1	slg	Amortization Period Of Deferred Gain Loss On Termination Of Interest Rate Hedge AmortizationPeriodOfDeferredGainLossOnTerminationOfInterestRateHedge	P10Y
CY2012Q4	us-gaap	Accumulated Other Comprehensive Income Loss Cumulative Changes In Net Gain Loss From Cash Flow Hedges Effect Net Of Tax AccumulatedOtherComprehensiveIncomeLossCumulativeChangesInNetGainLossFromCashFlowHedgesEffectNetOfTax	-32900000	USD
CY2013Q1	us-gaap	Accumulated Other Comprehensive Income Loss Cumulative Changes In Net Gain Loss From Cash Flow Hedges Effect Net Of Tax AccumulatedOtherComprehensiveIncomeLossCumulativeChangesInNetGainLossFromCashFlowHedgesEffectNetOfTax	-31100000	USD
CY2013Q1	us-gaap	Cash Flow Hedge Gain Loss To Be Reclassified Within Twelve Months CashFlowHedgeGainLossToBeReclassifiedWithinTwelveMonths	2100000	USD
CY2013Q1	us-gaap	Unrealized Gain Loss On Interest Rate Cash Flow Hedges Pretax Accumulated Other Comprehensive Income Loss UnrealizedGainLossOnInterestRateCashFlowHedgesPretaxAccumulatedOtherComprehensiveIncomeLoss	180000	USD
CY2012Q1	us-gaap	Unrealized Gain Loss On Interest Rate Cash Flow Hedges Pretax Accumulated Other Comprehensive Income Loss UnrealizedGainLossOnInterestRateCashFlowHedgesPretaxAccumulatedOtherComprehensiveIncomeLoss	-88000	USD
CY2013Q1	us-gaap	Interest Rate Cash Flow Hedge Gain Loss Reclassified To Earnings Net InterestRateCashFlowHedgeGainLossReclassifiedToEarningsNet	-1708000	USD
CY2012Q1	us-gaap	Interest Rate Cash Flow Hedge Gain Loss Reclassified To Earnings Net InterestRateCashFlowHedgeGainLossReclassifiedToEarningsNet	-3203000	USD
CY2013Q1	us-gaap	Derivative Instruments Not Designated As Hedging Instruments Gain Loss Net DerivativeInstrumentsNotDesignatedAsHedgingInstrumentsGainLossNet	-15000	USD
CY2012Q1	us-gaap	Derivative Instruments Not Designated As Hedging Instruments Gain Loss Net DerivativeInstrumentsNotDesignatedAsHedgingInstrumentsGainLossNet	-711000	USD
CY2013Q1	slg	Cash Flow Hedge Gain Loss To Be Reclassified Within Twelve Months Into Equity In Net Income CashFlowHedgeGainLossToBeReclassifiedWithinTwelveMonthsIntoEquityInNetIncome	4900000	USD
CY2013Q1	us-gaap	Number Of Reportable Segments NumberOfReportableSegments	2	segment
CY2013Q1	slg	Income Loss From Continuing Operations Before Realized Gain Loss On Disposal Of Equity Method Investment IncomeLossFromContinuingOperationsBeforeRealizedGainLossOnDisposalOfEquityMethodInvestment	29256000	USD
CY2013Q1	slg	Interest Cost Assumptions Leverage Rate InterestCostAssumptionsLeverageRate	1.00	pure
CY2013Q1	slg	Selling General And Administrative Expense And Transaction Related Costs SellingGeneralAndAdministrativeExpenseAndTransactionRelatedCosts	22400000	USD
CY2012Q1	slg	Income Loss From Continuing Operations Before Realized Gain Loss On Disposal Of Equity Method Investment IncomeLossFromContinuingOperationsBeforeRealizedGainLossOnDisposalOfEquityMethodInvestment	21431000	USD
CY2013Q1	us-gaap	Partners Capital Account Sale Of Units PartnersCapitalAccountSaleOfUnits	777000	USD
CY2013Q1	us-gaap	Partners Capital Account Redemptions PartnersCapitalAccountRedemptions	17287000	USD
CY2013Q1	slg	Derivative Instruments Fair Value Adjustment DerivativeInstrumentsFairValueAdjustment	128000	USD
CY2013Q1	us-gaap	Capital Expenditures Incurred But Not Yet Paid CapitalExpendituresIncurredButNotYetPaid	9136000	USD
CY2013Q1	slg	Operating Partnership Noncontrolling Interest Fair Value Adjustment OperatingPartnershipNoncontrollingInterestFairValueAdjustment	24016000	USD
CY2012Q1	us-gaap	Partners Capital Account Sale Of Units PartnersCapitalAccountSaleOfUnits	1131000	USD
CY2012Q1	us-gaap	Partners Capital Account Redemptions PartnersCapitalAccountRedemptions	275000	USD
CY2012Q1	slg	Derivative Instruments Fair Value Adjustment DerivativeInstrumentsFairValueAdjustment	288000	USD
CY2012Q1	us-gaap	Transfer Mortgage Payable TransferMortgagePayable	59099000	USD
CY2012Q1	us-gaap	Capital Expenditures Incurred But Not Yet Paid CapitalExpendituresIncurredButNotYetPaid	11941000	USD
CY2012Q1	slg	Operating Partnership Noncontrolling Interest Fair Value Adjustment OperatingPartnershipNoncontrollingInterestFairValueAdjustment	41935000	USD
CY2013Q1	us-gaap	Dilutive Securities Effect On Basic Earnings Per Share Other DilutiveSecuritiesEffectOnBasicEarningsPerShareOther	555000	USD
CY2012Q1	us-gaap	Dilutive Securities Effect On Basic Earnings Per Share Other DilutiveSecuritiesEffectOnBasicEarningsPerShareOther	888000	USD
CY2013Q1	us-gaap	Net Income Loss Available To Common Stockholders Diluted NetIncomeLossAvailableToCommonStockholdersDiluted	19464000	USD
CY2012Q1	us-gaap	Net Income Loss Available To Common Stockholders Diluted NetIncomeLossAvailableToCommonStockholdersDiluted	26144000	USD
CY2013Q1	slg	Incremental Common Shares Attributable To Redemption Of Units To Common Shares IncrementalCommonSharesAttributableToRedemptionOfUnitsToCommonShares	2687000	shares
CY2012Q1	slg	Incremental Common Shares Attributable To Redemption Of Units To Common Shares IncrementalCommonSharesAttributableToRedemptionOfUnitsToCommonShares	3049000	shares
CY2013Q1	us-gaap	Antidilutive Securities Excluded From Computation Of Earnings Per Share Amount AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount	988887	shares
CY2012Q1	us-gaap	Antidilutive Securities Excluded From Computation Of Earnings Per Share Amount AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount	785929	shares
CY2013Q1	us-gaap	Interest Expense InterestExpense	81789000	USD
CY2013Q1	us-gaap	Interest Income Operating InterestIncomeOperating	453000	USD
CY2013Q1	us-gaap	Interest Income Expense Net InterestIncomeExpenseNet	-81336000	USD
CY2013Q1	us-gaap	Interest Costs Incurred Capitalized InterestCostsIncurredCapitalized	3062000	USD
CY2012Q1	us-gaap	Interest Expense InterestExpense	80547000	USD
CY2012Q1	us-gaap	Interest Income Operating InterestIncomeOperating	410000	USD
CY2012Q1	us-gaap	Interest Income Expense Net InterestIncomeExpenseNet	-80137000	USD
CY2012Q1	us-gaap	Interest Costs Incurred Capitalized InterestCostsIncurredCapitalized	2536000	USD
CY2013Q1	slg	Future Amortization Of Debt And Long Term Debt Maturities Repayments Of Principal Second Full Fiscal Year FutureAmortizationOfDebtAndLongTermDebtMaturitiesRepaymentsOfPrincipalSecondFullFiscalYear	265839000	USD
CY2013Q1	slg	Future Amortization Of Debt And Long Term Debt Maturities Repayments Of Principal Third Full Fiscal Year FutureAmortizationOfDebtAndLongTermDebtMaturitiesRepaymentsOfPrincipalThirdFullFiscalYear	275869000	USD
CY2013Q1	slg	Future Amortization Of Debt And Long Term Debt Maturities Repayments Of Principal Fourth Full Fiscal Year FutureAmortizationOfDebtAndLongTermDebtMaturitiesRepaymentsOfPrincipalFourthFullFiscalYear	828681000	USD
CY2013Q1	slg	Future Amortization Of Debt And Long Term Debt Maturities Repayments Of Principal Fifth Full Fiscal Year FutureAmortizationOfDebtAndLongTermDebtMaturitiesRepaymentsOfPrincipalFifthFullFiscalYear	1460833000	USD
CY2013Q1	slg	Future Amortization Of Debt And Long Term Debt Maturities Repayments Of Principal After Fifth Full Fiscal Year FutureAmortizationOfDebtAndLongTermDebtMaturitiesRepaymentsOfPrincipalAfterFifthFullFiscalYear	3458665000	USD
CY2013Q1	us-gaap	Long Term Debt LongTermDebt	-6678073000	USD
CY2012Q1	us-gaap	Financing Receivable Allowance For Credit Losses Recovery FinancingReceivableAllowanceForCreditLossesRecovery	2400000	USD
CY2013Q1	us-gaap	Increase Decrease In Restricted Cash For Operating Activities IncreaseDecreaseInRestrictedCashForOperatingActivities	-5447000	USD
CY2013Q1	us-gaap	Increase Decrease In Accounts Receivable IncreaseDecreaseInAccountsReceivable	-7409000	USD
CY2013Q1	us-gaap	Increase Decrease In Due From Related Parties Current IncreaseDecreaseInDueFromRelatedPartiesCurrent	3638000	USD
CY2013Q1	us-gaap	Increase Decrease In Deferred Leasing Fees IncreaseDecreaseInDeferredLeasingFees	4646000	USD
CY2013Q1	us-gaap	Increase Decrease In Other Operating Assets IncreaseDecreaseInOtherOperatingAssets	21185000	USD
CY2013Q1	slg	Increase Decrease In Accrued Liabilities And Other IncreaseDecreaseInAccruedLiabilitiesAndOther	869000	USD
CY2013Q1	us-gaap	Increase Decrease In Deferred Liabilities IncreaseDecreaseInDeferredLiabilities	19596000	USD
CY2013Q1	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	102525000	USD
CY2013Q1	us-gaap	Payments To Acquire Real Estate PaymentsToAcquireRealEstate	48500000	USD
CY2013Q1	us-gaap	Payments To Acquire Productive Assets PaymentsToAcquireProductiveAssets	11617000	USD
CY2013Q1	us-gaap	Increase Decrease In Restricted Cash IncreaseDecreaseInRestrictedCash	-191000	USD
CY2013Q1	us-gaap	Payments To Acquire Equity Method Investments PaymentsToAcquireEquityMethodInvestments	49996000	USD
CY2013Q1	us-gaap	Proceeds From Real Estate And Real Estate Joint Ventures ProceedsFromRealEstateAndRealEstateJointVentures	5852000	USD
CY2013Q1	us-gaap	Payments To Acquire Other Investments PaymentsToAcquireOtherInvestments	10146000	USD
CY2013Q1	us-gaap	Proceeds From Sale And Maturity Of Other Investments ProceedsFromSaleAndMaturityOfOtherInvestments	-65607000	USD
CY2013Q1	us-gaap	Proceeds From Issuance Of Secured Debt ProceedsFromIssuanceOfSecuredDebt	980333000	USD
CY2013Q1	us-gaap	Repayments Of Secured Debt RepaymentsOfSecuredDebt	787887000	USD
CY2013Q1	us-gaap	Proceeds From Other Debt ProceedsFromOtherDebt	155000000	USD
CY2013Q1	us-gaap	Repayments Of Other Debt RepaymentsOfOtherDebt	199960000	USD
CY2013Q1	us-gaap	Proceeds From Stock Options Exercised ProceedsFromStockOptionsExercised	4546000	USD
CY2013Q1	us-gaap	Proceeds From Issuance Of Common Stock ProceedsFromIssuanceOfCommonStock	-57000	USD
CY2013Q1	slg	Distributions To Noncontrolling Interests Other Partnerships DistributionsToNoncontrollingInterestsOtherPartnerships	4879000	USD
CY2013Q1	slg	Proceeds From Noncontrolling Interests In Other Partnerships ProceedsFromNoncontrollingInterestsInOtherPartnerships	3110000	USD
CY2013Q1	slg	Distribution To Noncontrolling Interest Operating Partnership DistributionToNoncontrollingInterestOperatingPartnership	853000	USD
CY2013Q1	us-gaap	Payments Of Dividends PaymentsOfDividends	38591000	USD
CY2013Q1	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	102085000	USD

Files In Submission

Name	View Source	Status
0001104659-13-040293-index-headers.html	Edgar Link	pending
0001104659-13-040293-index.html	Edgar Link	pending
0001104659-13-040293.txt	Edgar Link	pending
0001104659-13-040293-xbrl.zip	Edgar Link	pending
a13-8396_110q.htm	Edgar Link	pending
a13-8396_1ex31d1.htm	Edgar Link	pending
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a13-8396_1ex32d1.htm	Edgar Link	pending
a13-8396_1ex32d2.htm	Edgar Link	pending
FilingSummary.xml	Edgar Link	unprocessable
Financial_Report.xls	Edgar Link	pending
R1.htm	Edgar Link	pending
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report.css	Edgar Link	pending
Show.js	Edgar Link	pending
slg-20130331.xml	Edgar Link	completed
slg-20130331.xsd	Edgar Link	pending
slg-20130331_cal.xml	Edgar Link	unprocessable
slg-20130331_def.xml	Edgar Link	unprocessable
slg-20130331_lab.xml	Edgar Link	unprocessable
slg-20130331_pre.xml	Edgar Link	unprocessable

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$SLG
SL Green Realty Corp Stock $slg

2013 Q1 Form 10-Q Financial Statement

#000110465913040293 Filed on May 10, 2013

Income Statement

Balance Sheet

Cashflow Statement

Facts In Submission

Files In Submission

$SLG SL Green Realty Corp Stock $slg

2013 Q1 Form 10-Q Financial Statement

#000110465913040293 Filed on May 10, 2013

Income Statement

Balance Sheet

Cashflow Statement

Facts In Submission

Files In Submission

$SLG
SL Green Realty Corp Stock $slg