SL Green Realty (SLG) 10-K25 Feb 142013 FY Annual reportFinancial data

Company Profile

Document_and_Entity_Informatio

Document and Entity Information (USD $)	12 Months Ended
In Billions, except Share data, unless otherwise specified	Dec. 31, 2013	Feb. 14, 2014	Jun. 30, 2013
Document Information [Line Items]	'	'	'
Entity Registrant Name	'SL GREEN REALTY CORP	'	'
Entity Central Index Key	'0001040971	'	'
Current Fiscal Year End Date	'--12-31	'	'
Entity Filer Category	'Large Accelerated Filer	'	'
Document Type	'10-K	'	'
Document Period End Date	31-Dec-13	'	'
Document Fiscal Year Focus	'2013	'	'
Document Fiscal Period Focus (Q1,Q2,Q3,FY)	'FY	'	'
Amendment Flag	'false	'	'
Entity Common Stock, Shares Outstanding (shares)	'	95,047,602	'
Entity Well-known Seasoned Issuer	'Yes	'	'
Entity Voluntary Filers	'No	'	'
Entity Current Reporting Status	'Yes	'	'
Entity Public Float	'	'	$7.60
SL Green Operating Partnership	'	'	'
Document Information [Line Items]	'	'	'
Entity Registrant Name	'SL GREEN OPERATING PARTNERSHIP, LP.	'	'
Entity Central Index Key	'0001492869	'	'
Current Fiscal Year End Date	'--12-31	'	'
Entity Filer Category	'Non-accelerated Filer	'	'
Document Type	'10-K	'	'
Document Period End Date	31-Dec-13	'	'
Document Fiscal Year Focus	'2013	'	'
Document Fiscal Period Focus (Q1,Q2,Q3,FY)	'FY	'	'
Amendment Flag	'false	'	'
Entity Common Stock, Shares Outstanding (shares)	'	876,199	'
Entity Well-known Seasoned Issuer	'No	'	'
Entity Voluntary Filers	'No	'	'
Entity Current Reporting Status	'Yes	'	'
Entity Public Float	'	'	$0

Consolidated_Balance_Sheets

Consolidated Balance Sheets (USD $)	Dec. 31, 2013	Dec. 31, 2012
In Thousands, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012
Commercial real estate properties, at cost:	'	'
Land and land interests	$3,032,526	$2,886,099
Building and improvements	7,884,663	7,389,766
Building leasehold and improvements	1,366,281	1,346,748
Properties under capital lease	50,310	40,340
Total commercial real estate properties, at cost	12,333,780	11,662,953
Less: accumulated depreciation	-1,646,240	-1,393,323
Total commercial real estate properties, net	10,687,540	10,269,630
Assets held for sale	0	4,901
Cash and cash equivalents	206,692	189,984
Restricted cash	142,051	136,071
Investment in marketable securities	32,049	21,429
Tenant and other receivables, net of allowance of $17,325 and $14,341 in 2013 and 2012, respectively	60,393	55,855
Related party receivables	8,530	7,531
Deferred rents receivable, net of allowance of $30,333 and $29,580 in 2013 and 2012, respectively	386,508	340,747
Debt and preferred equity investments, net of discounts and deferred origination fees of $18,593 and $22,341 in 2013 and 2012, and allowance of $1,000 and $7,000 in 2013 and 2012, respectively	1,304,839	1,348,434
Investments in unconsolidated joint ventures	1,113,218	1,032,243
Deferred costs, net	267,058	261,145
Other assets	750,123	718,326
Total assets	14,959,001	14,386,296
Liabilities	'	'
Mortgages and other loans payable	4,860,578	4,615,464
Revolving credit facility	220,000	70,000
Term loan and senior unsecured notes	1,739,330	1,734,956
Accrued interest payable and other liabilities	114,622	81,080
Accounts payable and accrued expenses	145,889	159,598
Deferred revenue	263,261	312,995
Capitalized lease obligations	47,671	37,518
Deferred land leases payable	22,185	20,897
Dividend and distributions payable	52,255	37,839
Security deposits	61,308	46,253
Liabilities related to assets held for sale	0	136
Junior subordinate deferrable interest debentures held by trusts that issued trust preferred securities	100,000	100,000
Total liabilities	7,627,099	7,216,736
Commitments and contingencies	0	0
Noncontrolling interests in Operating Partnership	265,476	212,907
Equity	'	'
Common stock, $0.01 par value, 160,000 shares authorized and 98,563 and 94,896 issued and outstanding at December 31, 2013 and 2012, respectively (including 3,570 and 3,646 shares held in Treasury at December 31, 2013 and 2012, respectively)	986	950
Additional paid-in-capital	5,015,904	4,667,900
Treasury stock at cost	-317,356	-322,858
Accumulated other comprehensive loss	-15,211	-29,587
Retained earnings	1,619,150	1,701,092
Total SL Green stockholders' equity	6,525,405	6,419,802
Noncontrolling interests in other partnerships	491,471	487,301
Total equity	7,016,876	6,907,103
Total liabilities and equity	14,959,001	14,386,296
Series G Preferred Units	'	'
Liabilities	'	'
Preferred Units	47,550	47,550
Series H Preferred Units	'	'
Liabilities	'	'
Preferred Units	2,000	2,000
Series C Preferred Stock	'	'
Equity	'	'
Preferred stock, issued	0	180,340
Series I Preferred Stock	'	'
Equity	'	'
Preferred stock, issued	221,932	221,965
SL Green Operating Partnership	'	'
Commercial real estate properties, at cost:	'	'
Land and land interests	3,032,526	2,886,099
Building and improvements	7,884,663	7,389,766
Building leasehold and improvements	1,366,281	1,346,748
Properties under capital lease	50,310	40,340
Total commercial real estate properties, at cost	12,333,780	11,662,953
Less: accumulated depreciation	-1,646,240	-1,393,323
Total commercial real estate properties, net	10,687,540	10,269,630
Assets held for sale	0	4,901
Cash and cash equivalents	206,692	189,984
Restricted cash	142,051	136,071
Investment in marketable securities	32,049	21,429
Tenant and other receivables, net of allowance of $17,325 and $14,341 in 2013 and 2012, respectively	60,393	55,855
Related party receivables	8,530	7,531
Deferred rents receivable, net of allowance of $30,333 and $29,580 in 2013 and 2012, respectively	386,508	340,747
Debt and preferred equity investments, net of discounts and deferred origination fees of $18,593 and $22,341 in 2013 and 2012, and allowance of $1,000 and $7,000 in 2013 and 2012, respectively	1,304,839	1,348,434
Investments in unconsolidated joint ventures	1,113,218	1,032,243
Deferred costs, net	267,058	261,145
Other assets	750,123	718,326
Total assets	14,959,001	14,386,296
Liabilities	'	'
Mortgages and other loans payable	4,860,578	4,615,464
Revolving credit facility	220,000	70,000
Term loan and senior unsecured notes	1,739,330	1,734,956
Accrued interest payable and other liabilities	114,622	81,080
Accounts payable and accrued expenses	145,889	159,598
Deferred revenue	263,261	312,995
Capitalized lease obligations	47,671	37,518
Deferred land leases payable	22,185	20,897
Dividend and distributions payable	52,255	37,839
Security deposits	61,308	46,253
Liabilities related to assets held for sale	0	136
Junior subordinate deferrable interest debentures held by trusts that issued trust preferred securities	100,000	100,000
Total liabilities	7,627,099	7,216,736
Commitments and contingencies	0	0
Equity	'	'
Accumulated other comprehensive loss	-15,662	-30,649
Total liabilities and equity	14,959,001	14,386,296
SL Green stockholders equity:	'	'
SL Green partners' capital (979 and 940 general partner common units and 94,014 and 90,310 limited partner common units outstanding at December 31, 2013 and 2012, respectively)	6,506,747	6,189,529
Limited partner interests in SLGOP (2,902 and 2,760 limited partner common units outstanding at December 31, 2013 and 2012, respectively	77,864	71,524
Total SLGOP partners' capital	6,790,881	6,632,709
Noncontrolling interests in other partnerships	491,471	487,301
Total capital	7,282,352	7,120,010
SL Green Operating Partnership \| Series G Preferred Units	'	'
SL Green stockholders equity:	'	'
Preferred units	47,550	47,550
SL Green Operating Partnership \| Series H Preferred Units	'	'
SL Green stockholders equity:	'	'
Preferred units	2,000	2,000
SL Green Operating Partnership \| Series C Preferred Stock	'	'
SL Green stockholders equity:	'	'
Preferred units	0	180,340
Total capital	0	180,340
SL Green Operating Partnership \| Series I Preferred Stock	'	'
SL Green stockholders equity:	'	'
Preferred units	221,932	221,965
Total capital	$221,932	$221,965

Consolidated_Balance_Sheets_Pa

Consolidated Balance Sheets (Parenthetical) (USD $)

Dec. 31, 2013

Dec. 31, 2012

Dec. 31, 2013

Dec. 31, 2012

Dec. 31, 2013

Dec. 31, 2012

Dec. 31, 2013

Dec. 31, 2012

Dec. 31, 2013

Dec. 31, 2012

Dec. 31, 2013

Dec. 31, 2012

Dec. 31, 2013

Dec. 31, 2012

Dec. 31, 2013

Dec. 31, 2012

In Thousands, except Share data, unless otherwise specified

Series H Preferred Units

Series G Preferred Units

Series C Preferred Stock

Series I Preferred Stock

SL Green Operating Partnership

Series H Preferred Units

Series G Preferred Units

Series C Preferred Stock

Series I Preferred Stock

Tenant and other receivables, allowance (in dollars)

$17,325

$14,341

$17,325

$14,341

Deferred rents receivable, allowance (in dollars)

30,333

29,580

30,333

29,580

Debt and preferred equity investments, discount (in dollars)

18,593

22,341

8,624

26,466

Debt and preferred equity investments, allowance (in dollars)

$1,000

$7,000

$1,000

$7,000

Preferred Units, shares issued (shares)

80,000

1,902,000

80,000

1,902,000

7,700,000

9,200,000

Preferred Units, shares outstanding (shares)

80,000

1,902,000

80,000

1,902,000

11,700,000

9,200,000

Preferred Units, liquidation preference (in dollars per share)

$25

Preferred stock, par value (in dollars per share)

$0.01

Preferred stock, liquidation preference (in dollars per share)

$25

Preferred stock, shares issued (shares)

7,700,000

9,200,000

Preferred stock, shares outstanding (shares)

7,700,000

9,200,000

Common stock, par value (in dollars per share)

$0.01

Common stock, shares authorized (shares)

160,000,000

Common stock, shares issued (shares)

98,563,000

94,896,000

Common stock, shares outstanding (shares)

98,563,000

94,896,000

Treasury stock, shares (shares)

3,570,000

3,646,000

SL Green partner's capital, general partner common units outstanding (shares)

940,000

885,000

SL Green partners' capital, limited partner common units outstanding (shares)

94,993,000

90,310,000

Limited partner interests in Operating Partnership, limited partner common units outstanding (shares)

2,902,000

2,760,000

Consolidated_Statements_of_Inc

Consolidated Statements of Income (USD $)	3 Months Ended				12 Months Ended
Share data in Thousands, except Per Share data, unless otherwise specified	Dec. 31, 2012	Sep. 30, 2012	Jun. 30, 2012	Mar. 31, 2012	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Revenues	'	'	'	'	'	'	'
Rental revenue, net	'	'	'	'	$1,080,684,000	$1,062,682,000	$947,479,000
Escalation and reimbursement	'	'	'	'	169,529,000	165,156,000	143,544,000
Investment income	'	'	'	'	193,843,000	119,155,000	120,418,000
Other income	'	'	'	'	25,021,000	35,736,000	35,418,000
Total revenues	346,599,000	357,011,000	344,535,000	334,585,000	1,469,077,000	1,382,729,000	1,246,859,000
Expenses	'	'	'	'	'	'	'
Operating expenses (including $18,728 (2013), $17,274 (2012) and $15,041 (2011) of related party expenses)	'	'	'	'	293,514,000	292,392,000	257,938,000
Real estate taxes	'	'	'	'	218,832,000	209,337,000	173,154,000
Ground rent	'	'	'	'	39,926,000	37,866,000	32,919,000
Interest expense, net of interest income	'	'	'	'	330,215,000	329,897,000	285,248,000
Amortization of deferred financing costs	'	'	'	'	16,695,000	19,450,000	14,108,000
Depreciation and amortization	'	'	'	'	337,692,000	325,737,000	271,306,000
Loan loss and other investment reserves, net of recoveries	'	'	'	'	0	564,000	6,722,000
Transaction related costs, net of recoveries	'	'	'	'	3,987,000	5,625,000	5,561,000
Marketing, general and administrative	'	'	'	'	86,192,000	82,840,000	80,103,000
Total expenses	'	'	'	'	1,327,053,000	1,303,708,000	1,127,059,000
Income from continuing operations before equity in net income from unconsolidated joint ventures, equity in net gain on sale of interest in unconsolidated joint venture/real estate, purchase price fair value adjustment, (loss) gain on sale of investment in marketable securities, depreciable real estate reserves and (loss) gain on early extinguishment of debt	'	'	'	'	142,024,000	79,021,000	119,800,000
Equity in net income from unconsolidated joint ventures	'	'	'	'	9,921,000	76,418,000	1,583,000
Equity in net gain on sale of interest in unconsolidated joint venture/ real estate	19,277,000	-4,807,000	15,323,000	7,260,000	3,601,000	37,053,000	2,918,000
Purchase price fair value adjustment	'	'	'	'	-2,305,000	0	498,195,000
(Loss) gain on sale of investment in marketable securities	'	'	'	'	-65,000	4,940,000	4,866,000
Depreciable real estate reserves	'	'	'	'	0	0	-5,789,000
(Loss) gain on early extinguishment of debt	-6,978,000	0	0	0	-18,518,000	-6,978,000	904,000
Income from continuing operations	'	'	'	'	134,658,000	190,454,000	622,477,000
Net income from discontinued operations	9,737,000	951,000	899,000	1,032,000	1,725,000	12,619,000	8,560,000
Gain on sale of discontinued operations	0	0	0	6,627,000	14,900,000	6,627,000	46,085,000
Net income	'	'	'	'	151,283,000	209,700,000	677,122,000
Net income attributable to noncontrolling interests:	'	'	'	'	'	'	'
Noncontrolling interests in the Operating Partnership	'	'	'	'	-3,023,000	-5,597,000	-14,629,000
Noncontrolling interests in other partnerships	'	'	'	'	-10,629,000	-5,591,000	-15,083,000
Preferred units distribution	'	'	'	'	-2,260,000	-2,107,000	0
Net income attributable to SL Green	27,363,000	25,657,000	110,584,000	32,801,000	135,371,000	196,405,000	647,410,000
Preferred stock redemption costs	0	-10,010,000	0	0	-12,160,000	-10,010,000	0
Perpetual preferred stock dividends	-7,407,000	-7,915,000	-7,544,000	-7,545,000	-21,881,000	-30,411,000	-30,178,000
Net income	19,956,000	7,732,000	103,040,000	25,256,000	101,330,000	155,984,000	617,232,000
Amounts attributable to SL Green common stockholders:	'	'	'	'	'	'	'
Income from continuing operations	'	'	'	'	83,927,000	101,638,000	74,341,000
Purchase price fair value adjustment	'	'	'	'	-2,239,000	0	486,660,000
Equity in net gain on sale of interest in unconsolidated joint venture/real estate	'	'	'	'	3,496,000	35,769,000	2,850,000
Net income from discontinued operations	'	'	'	'	1,675,000	12,180,000	8,363,000
Gain on sale of discontinued operations	'	'	'	'	14,471,000	6,397,000	45,018,000
Net income	19,956,000	7,732,000	103,040,000	25,256,000	101,330,000	155,984,000	617,232,000
Basic earnings per share:	'	'	'	'	'	'	'
Income from continuing operations before discontinued operations (usd per share)	'	'	'	'	$0.89	$1.14	$6.70
Equity in net gain on sale of interest in unconsolidated joint venture/real estate (usd per share)	'	'	'	'	$0.04	$0.40	$0.03
Net income from discontinued operations (usd per share)	'	'	'	'	$0.02	$0.14	$0.10
Gain on sale of discontinued operations (usd per share)	'	'	'	'	$0.15	$0.07	$0.54
Net income attributable to SL Green common stockholders (usd per share)	$0.22	$0.09	$1.15	$0.29	$1.10	$1.75	$7.37
Diluted earnings per share:	'	'	'	'	'	'	'
Income from continuing operations before discontinued operations (usd per share)	'	'	'	'	$0.88	$1.13	$6.67
Equity in net gain on sale of interest in unconsolidated joint venture/real estate (usd per share)	'	'	'	'	$0.04	$0.40	$0.03
Net income from discontinued operations (usd per share)	'	'	'	'	$0.02	$0.14	$0.10
Gain on sale of discontinued operations (usd per share)	'	'	'	'	$0.16	$0.07	$0.53
Net income attributable to SL Green common stockholders (usd per share)	$0.22	$0.09	$1.14	$0.29	$1.10	$1.74	$7.33
Basic weighted average common shares outstanding (in shares)	'	'	'	'	92,269	89,319	83,762
Diluted weighted average common shares and common share equivalents outstanding (usd per share)	'	'	'	'	95,266	92,873	86,244
Noncontrolling Interest [Abstract]	'	'	'	'	'	'	'
Purchase price fair value adjustment	'	'	'	'	-2,305,000	0	498,195,000
SL Green Operating Partnership	'	'	'	'	'	'	'
Revenues	'	'	'	'	'	'	'
Rental revenue, net	'	'	'	'	1,080,684,000	1,062,682,000	947,479,000
Escalation and reimbursement	'	'	'	'	169,529,000	165,156,000	143,544,000
Investment income	'	'	'	'	193,843,000	119,155,000	120,418,000
Other income	'	'	'	'	25,021,000	35,736,000	35,418,000
Total revenues	346,598,000	357,011,000	344,535,000	334,585,000	1,469,077,000	1,382,729,000	1,246,859,000
Expenses	'	'	'	'	'	'	'
Operating expenses (including $18,728 (2013), $17,274 (2012) and $15,041 (2011) of related party expenses)	'	'	'	'	293,514,000	292,392,000	257,938,000
Real estate taxes	'	'	'	'	218,832,000	209,337,000	173,154,000
Ground rent	'	'	'	'	39,926,000	37,866,000	32,919,000
Interest expense, net of interest income	'	'	'	'	330,215,000	329,897,000	285,248,000
Amortization of deferred financing costs	'	'	'	'	16,695,000	19,450,000	14,108,000
Depreciation and amortization	'	'	'	'	337,692,000	325,737,000	271,306,000
Loan loss and other investment reserves, net of recoveries	'	'	'	'	0	564,000	6,722,000
Transaction related costs, net of recoveries	'	'	'	'	3,987,000	5,625,000	5,561,000
Marketing, general and administrative	'	'	'	'	86,192,000	82,840,000	80,103,000
Total expenses	'	'	'	'	1,327,053,000	1,303,708,000	1,127,059,000
Income from continuing operations before equity in net income from unconsolidated joint ventures, equity in net gain on sale of interest in unconsolidated joint venture/real estate, purchase price fair value adjustment, (loss) gain on sale of investment in marketable securities, depreciable real estate reserves and (loss) gain on early extinguishment of debt	'	'	'	'	142,024,000	79,021,000	119,800,000
Equity in net income from unconsolidated joint ventures	'	'	'	'	9,921,000	76,418,000	1,583,000
Equity in net gain on sale of interest in unconsolidated joint venture/ real estate	19,277,000	-4,807,000	15,323,000	7,260,000	3,601,000	37,053,000	2,918,000
Purchase price fair value adjustment	'	'	'	'	-2,305,000	0	498,195,000
(Loss) gain on sale of investment in marketable securities	'	'	'	'	-65,000	4,940,000	4,866,000
Depreciable real estate reserves	'	'	'	'	0	0	-5,789,000
(Loss) gain on early extinguishment of debt	-6,978,000	0	0	0	-18,518,000	-6,978,000	904,000
Income from continuing operations	'	'	'	'	134,658,000	190,454,000	622,477,000
Net income from discontinued operations	9,737,000	951,000	899,000	1,032,000	1,725,000	12,619,000	8,560,000
Gain on sale of discontinued operations	0	0	0	6,627,000	14,900,000	6,627,000	46,085,000
Net income	'	'	'	'	151,283,000	209,700,000	677,122,000
Net income attributable to noncontrolling interests:	'	'	'	'	'	'	'
Noncontrolling interests in other partnerships	'	'	'	'	-10,629,000	-5,591,000	-15,083,000
Net income attributable to SL Green	'	'	'	'	138,394,000	202,002,000	662,039,000
Preferred stock redemption costs	0	-10,010,000	0	0	'	'	'
Perpetual preferred stock dividends	-7,407,000	-7,915,000	-7,544,000	-7,545,000	'	'	'
Net income	'	'	'	'	104,353,000	161,581,000	631,861,000
Amounts attributable to SL Green common stockholders:	'	'	'	'	'	'	'
Income from continuing operations	'	'	'	'	86,432,000	105,282,000	76,103,000
Equity in net gain on sale of interest in unconsolidated joint venture/real estate	'	'	'	'	3,601,000	37,053,000	2,918,000
Gain on sale of discontinued operations	'	'	'	'	14,900,000	6,627,000	46,085,000
Net income	'	'	'	'	104,353,000	161,581,000	631,861,000
Basic earnings per share:	'	'	'	'	'	'	'
Equity in net gain on sale of interest in unconsolidated joint venture/real estate (usd per share)	'	'	'	'	$0.04	$0.40	$0.03
Gain on sale of discontinued operations (usd per share)	'	'	'	'	$0.15	$0.07	$0.54
Net income attributable to SL Green common stockholders (usd per share)	$0.22	$0.09	$1.15	$0.29	'	'	'
Diluted earnings per share:	'	'	'	'	'	'	'
Equity in net gain on sale of interest in unconsolidated joint venture/real estate (usd per share)	'	'	'	'	$0.04	$0.40	$0.03
Gain on sale of discontinued operations (usd per share)	'	'	'	'	$0.16	$0.07	$0.53
Net income attributable to SL Green common stockholders (usd per share)	$0.22	$0.09	$1.14	$0.29	'	'	'
Noncontrolling Interest [Abstract]	'	'	'	'	'	'	'
Preferred unit distributions	'	'	'	'	-2,260,000	-2,107,000	0
Preferred unit redemption costs	'	'	'	'	-12,160,000	-10,010,000	0
Perpetual preferred unit distributions	'	'	'	'	-21,881,000	-30,411,000	-30,178,000
Net income attributable to SLGOP common unitholders	20,677,000	8,299,000	106,461,000	26,144,000	104,353,000	161,581,000	631,861,000
Purchase price fair value adjustment	'	'	'	'	-2,305,000	0	498,195,000
Net income from discontinued operations	'	'	'	'	$1,725,000	$12,619,000	$8,560,000
Net income from continuing operations before gains on sale and discontinued operations (in dollars per share)	'	'	'	'	$0.89	$1.14	$6.70
Net income from discontinued operations (in dollars per share)	'	'	'	'	$0.02	$0.14	$0.10
Net income attributable to SL Green common stockholders (in dollars per share)	'	'	'	'	$1.10	$1.75	$7.37
Net income from continuing operations before gains on sale and discontinued operations (in dollars per share)	'	'	'	'	$0.88	$1.13	$6.67
Net income from discontinued operations (in dollars per share)	'	'	'	'	$0.02	$0.14	$0.10
Net income attributable to SL Green common stockholders (in dollars per share)	'	'	'	'	$1.10	$1.74	$7.33
Basic weighted average common shares outstanding (in shares)	'	'	'	'	95,004	92,526	85,747
Diluted weighted average common shares and common share equivalents outstanding (in shares)	'	'	'	'	95,266	92,873	86,244

Consolidated_Statements_of_Inc1

Consolidated Statements of Income (Parenthetical) (USD $)	12 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Operating expenses, paid to related parties	$18,728	$17,274	$15,041
SL Green Operating Partnership	'	'	'
Operating expenses, paid to related parties	$18,728	$17,274	$16,266

Consolidated_Statements_of_Com

Consolidated Statements of Comprehensive Income (USD $)	3 Months Ended								12 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2013	Sep. 30, 2013	Jun. 30, 2013	Mar. 31, 2013	Dec. 31, 2012	Sep. 30, 2012	Jun. 30, 2012	Mar. 31, 2012	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Net income	'	'	'	'	'	'	'	'	$151,283	$209,700	$677,122
Other comprehensive income (loss):	'	'	'	'	'	'	'	'	'	'	'
Change in net unrealized gain (loss) on derivative instruments, including SL Green's share of joint venture net unrealized gain (loss) on derivative instruments	'	'	'	'	'	'	'	'	13,490	2,127	-3,346
Change in unrealized gain (loss) on marketable securities	'	'	'	'	'	'	'	'	1,497	-3,657	-2,731
Other comprehensive income (loss)	'	'	'	'	'	'	'	'	14,987	-1,530	-6,077
Comprehensive income	'	'	'	'	'	'	'	'	166,270	208,170	671,045
Net income attributable to noncontrolling interests	'	'	'	'	'	'	'	'	-15,912	-13,295	-29,712
Other comprehensive (income) loss attributable to noncontrolling interests	'	'	'	'	'	'	'	'	-611	388	291
Comprehensive income attributable to SL Green	'	'	'	'	'	'	'	'	149,747	195,263	641,624
SL Green Operating Partnership	'	'	'	'	'	'	'	'	'	'	'
Net income	'	'	'	'	'	'	'	'	151,283	209,700	677,122
Other comprehensive income (loss):	'	'	'	'	'	'	'	'	'	'	'
Change in net unrealized gain (loss) on derivative instruments, including SL Green's share of joint venture net unrealized gain (loss) on derivative instruments	'	'	'	'	'	'	'	'	13,490	2,127	-3,346
Change in unrealized gain (loss) on marketable securities	'	'	'	'	'	'	'	'	1,497	-3,657	-2,731
Other comprehensive income (loss)	'	'	'	'	'	'	'	'	14,987	-1,530	-6,077
Comprehensive income	'	'	'	'	'	'	'	'	166,270	208,170	671,045
Net income attributable to noncontrolling interests	41,971	41,873	27,679	26,871	28,084	26,224	114,005	33,689	-10,629	-5,591	-15,083
Comprehensive income attributable to SL Green	'	'	'	'	'	'	'	'	$155,641	$202,579	$655,962

Consolidated_Statements_of_Equ

Consolidated Statements of Equity (USD $)	Total	Common Stock	Additional Paid- In-Capital	Treasury Stock	Accumulated Other Comprehensive Income (Loss)	Retained Earnings	Noncontrolling Interests	Series C Preferred Stock	Series D Preferred Stock	Series I Preferred Stock
In Thousands, except Share data, unless otherwise specified	Total	Common Stock	Additional Paid- In-Capital	Treasury Stock	Accumulated Other Comprehensive Income (Loss)	Retained Earnings	Noncontrolling Interests	Preferred Stock	Preferred Stock	Preferred Stock
Balance at Dec. 31, 2010	$5,397,544	$817	$3,660,842	($303,222)	($22,659)	$1,172,963	$518,460	$274,022	$96,321	$0
Balance (in shares) at Dec. 31, 2010	'	78,307,000	'	'	'	'	'	'	'	'
Increase (Decrease) in Stockholders' Equity	'	'	'	'	'	'	'	'	'	'
Net income	662,493	'	'	'	'	647,410	15,083	'	'	'
Other comprehensive income:	-5,786	'	'	'	-5,786	'	'	'	'	'
Preferred dividends	-30,178	'	'	'	'	-30,178	'	'	'	'
Redemption of units and DRIP proceeds	898	'	898	'	'	'	'	'	'	'
Redemption of units and DRIP proceeds (in shares)	'	13,000	'	'	'	'	'	'	'	'
Reallocation of noncontrolling interest in the operating partnership	-39,040	'	'	'	'	-39,040	'	'	'	'
Deferred compensation plan and stock award, net	-4,787	3	696	-5,486	'	'	'	'	'	'
Deferred compensation plan and stock award, net (in shares)	'	262,000	'	'	'	'	'	'	'	'
Amortization of deferred compensation plan	33,252	'	33,252	'	'	'	'	'	'	'
Proceeds from issuance of common stock	531,306	70	531,236	'	'	'	'	'	'	'
Proceeds from issuance of common stock (in shares)	'	6,957,000	'	'	'	'	'	'	'	'
Proceeds from stock options exercised	10,037	2	10,035	'	'	'	'	'	'	'
Proceeds from stock options exercised (in shares)	'	244,000	'	'	'	'	'	'	'	'
Consolidation of joint venture interest	87,798	'	'	'	'	'	87,798	'	'	'
Cash distributions to noncontrolling interests	-143,579	'	'	'	'	'	-143,579	'	'	'
Cash distribution declared	-46,649	'	'	'	'	-46,649	'	'	'	'
Balance at Dec. 31, 2011	6,453,309	892	4,236,959	-308,708	-28,445	1,704,506	477,762	274,022	96,321	0
Balance (in shares) at Dec. 31, 2011	'	85,783,000	'	'	'	'	'	'	'	'
Increase (Decrease) in Stockholders' Equity	'	'	'	'	'	'	'	'	'	'
Net income	201,996	'	'	'	'	196,405	5,591	'	'	'
Other comprehensive income:	-1,142	'	'	'	-1,142	'	'	'	'	'
Preferred dividends	-30,411	'	'	'	'	-30,411	'	'	'	'
Redemption of units and DRIP proceeds	99,570	13	99,557	'	'	'	'	'	'	'
Redemption of units and DRIP proceeds (in shares)	'	1,305,000	'	'	'	'	'	'	'	'
Conversion of units of the Operating Partnership to common stock	87,513	11	87,502	'	'	'	'	'	'	'
Conversion of units of the Operating Partnership to common stock (in shares)	'	1,096,000	'	'	'	'	'	'	'	'
Redemption of preferred stock	-200,013	'	'	'	'	-10,010	'	-93,682	-96,321	'
Reallocation of noncontrolling interest in the operating partnership	-61,238	'	'	'	'	-61,238	'	'	'	'
Deferred compensation plan and stock award, net	-13,428	3	719	-14,150	'	'	'	'	'	'
Deferred compensation plan and stock award, net (in shares)	'	43,000	'	'	'	'	'	'	'	'
Amortization of deferred compensation plan	28,742	'	28,742	'	'	'	'	'	'	'
Issuance of common stock	221,965	'	'	'	'	'	'	'	'	221,965
Proceeds from issuance of common stock	201,279	27	201,252	'	'	'	'	'	'	'
Proceeds from issuance of common stock (in shares)	'	2,640,000	'	'	'	'	'	'	'	'
Proceeds from stock options exercised	13,173	4	13,169	'	'	'	'	'	'	'
Proceeds from stock options exercised (in shares)	'	383,000	'	'	'	'	'	'	'	'
Consolidation of joint venture interest	25,894	'	'	'	'	'	25,894	'	'	'
Cash distributions to noncontrolling interests	-21,946	'	'	'	'	'	-21,946	'	'	'
Cash distribution declared	-98,160	'	'	'	'	-98,160	'	'	'	'
Balance at Dec. 31, 2012	6,907,103	950	4,667,900	-322,858	-29,587	1,701,092	487,301	180,340	0	221,965
Balance (in shares) at Dec. 31, 2012	'	91,250,000	'	'	'	'	'	'	'	'
Increase (Decrease) in Stockholders' Equity	'	'	'	'	'	'	'	'	'	'
Net income	146,000	'	'	'	'	135,371	10,629	'	'	'
Other comprehensive income:	14,376	'	'	'	14,376	'	'	'	'	'
Preferred dividends	-21,881	'	'	'	'	-21,881	'	'	'	'
Redemption of units and DRIP proceeds	67	'	67	'	'	'	'	'	'	'
Conversion of units of the Operating Partnership to common stock	17,287	2	17,285	'	'	'	'	'	'	'
Conversion of units of the Operating Partnership to common stock (in shares)	'	239,000	'	'	'	'	'	'	'	'
Redemption of preferred stock	-192,500	'	'	'	'	-12,160	'	-180,340	'	'
Preferred stock issuance costs	-33	'	'	'	'	'	'	'	'	-33
Reallocation of noncontrolling interest in the operating partnership	-45,618	'	'	'	'	-45,618	'	'	'	'
Deferred compensation plan and stock award, net	166	2	752	-588	'	'	'	'	'	'
Deferred compensation plan and stock award, net (in shares)	'	135,000	'	'	'	'	'	'	'	'
Amortization of deferred compensation plan	26,329	'	26,329	'	'	'	'	'	'	'
Issuance of common stock	290,699	30	290,669	'	'	'	'	'	'	'
Issuance of common stock (shares)	'	3,062,000	'	'	'	'	'	'	'	'
Proceeds from issuance of common stock	12,904	2	12,902	'	'	'	'	'	'	'
Proceeds from issuance of common stock (in shares)	'	224,000	'	'	'	'	'	'	'	'
Sale of treasury stock	7,120	'	'	6,090	'	1,030	'	'	'	'
Sale of treasury stock (shares)	'	83,000	'	'	'	'	'	'	'	'
Contribution to consolidated joint venture interest	8,164	'	'	'	'	'	8,164	'	'	'
Cash contributions from noncontrolling interests	-14,623	'	'	'	'	'	-14,623	'	'	'
Cash distribution declared	-138,684	'	'	'	'	-138,684	'	'	'	'
Balance at Dec. 31, 2013	$7,016,876	$986	$5,015,904	($317,356)	($15,211)	$1,619,150	$491,471	$0	$0	$221,932

Consolidated_Statements_of_Equ1

Consolidated Statements of Equity (Parenthetical) (USD $)	12 Months Ended
Consolidated Statements of Equity (Parenthetical) (USD $)	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Statement of Stockholders' Equity [Abstract]	'	'	'
Cash distribution declared, per common share (usd per share)	$1.49	$1.08	$0.55

Consolidated_Statements_of_Cap

Consolidated Statements of Capital Statement (USD $)

12 Months Ended

In Thousands, unless otherwise specified

Dec. 31, 2013

Dec. 31, 2012

Dec. 31, 2011

Dec. 31, 2013

Dec. 31, 2012

Dec. 31, 2011

Dec. 31, 2013

Dec. 31, 2012

Dec. 31, 2011

Dec. 31, 2013

Dec. 31, 2012

Dec. 31, 2011

Dec. 31, 2013

Dec. 31, 2012

Dec. 31, 2011

Dec. 31, 2012

Dec. 31, 2011

Dec. 31, 2013

Dec. 31, 2012

Dec. 31, 2013

Dec. 31, 2012

Dec. 31, 2011

Dec. 31, 2013

Dec. 31, 2012

Dec. 31, 2011

Dec. 31, 2013

Dec. 31, 2012

Dec. 31, 2011

SL Green Operating Partnership

General Partner

Limited Partners

Series C Preferred Stock

Series D Preferred Stock

Series I Preferred Stock

Common Stock

Accumulated Other Comprehensive Income (Loss)

Noncontrolling Interests

Limited Partners

Increase (Decrease) in Stockholders' Equity

Beginning Balance

$7,120,010

$6,648,339

$5,481,882

$6,189,529

$5,714,856

$4,573,565

$180,340

$274,022

$96,321

$221,965

$71,524

$114,497

$42,556

($30,649)

($29,119)

($23,042)

$487,301

$477,762

$518,460

Balance (shares)

91,250

85,783

78,307

2,760

2,765

1,249

Net income

149,023

207,593

677,122

113,490

165,994

617,232

6,932

20,290

22,300

4,266

7,878

14,949

5,855

3,023

5,597

14,629

10,629

5,591

15,083

Other comprehensive income

14,987

-1,530

-6,077

14,987

-1,530

-6,077

14,987

-1,530

-6,077

Preferred distributions

-21,881

-30,411

-30,178

-6,932

-20,290

-22,300

-4,266

-7,878

-14,949

-5,855

Issuance of units in the Operating Partnership

24,750

42,239

62,443

24,750

42,239

60,443

24,750

42,239

60,443

Issuance of units (in units)

381

801

1,530

DRIP proceeds

99,570

898

99,570

898

-866

DRIP proceeds (in units)

-1,305

-13

-12

Conversion of units

17,287

87,513

17,287

87,513

-17,287

-87,513

Conversion of units (in units)

-239

-1,096

239

1,096

Redemption of preferred units

-192,500

-200,013

-192,500

-200,013

-12,160

-10,010

-180,340

-93,682

-96,321

Preferred units issuance costs

-33

Deferred compensation plan (shares)

-135

-43

-262

-290

-2

Deferred compensation plan

166

-13,428

-4,787

166

-13,428

-4,787

166

-13,428

-4,787

Amortization of deferred compensation plan

26,329

28,742

33,252

26,329

28,742

33,252

26,329

28,742

33,252

Contribution to consolidated joint venture interest

8,164

Contributions to consolidated joint venture

25,894

86,797

-1,001

25,894

87,798

Contributionsbnet proceeds from preferred stock offering

221,965

Contributionsbnet proceeds from common stock offering

290,699

201,279

531,306

290,699

201,279

531,306

Contributions - net proceeds from common stock offering (in units)

3,062

2,640

6,957

Contributions-treasury shares

-7,120

7,120

Contributions-treasury shares (shares)

Contributions - proceeds from stock options exercised

12,904

13,173

10,037

12,904

13,173

10,037

Contributions - proceeds from stock options exercised (in units)

224

383

244

Cash distributions to noncontrolling interests

-21,946

-143,579

-14,623

-21,946

-143,579

-14,623

-21,946

-143,579

Cash distribution declared ($0.99 per common unit, none of which represented a return of capital for federal income tax purposes)

-142,830

-101,456

-47,911

-138,684

-98,160

-46,647

-4,146

-3,296

-1,264

Ending Balance

$7,282,352

$7,120,010

$6,648,339

$6,506,747

$6,189,529

$5,714,856

$180,340

$274,022

$96,321

$221,932

$221,965

$77,864

$71,524

$114,497

($15,662)

($30,649)

($29,119)

$491,471

$487,301

$477,762

Balance (shares)

94,993

91,250

85,783

2,902

2,760

2,765

Consolidated_Statements_of_Cap1

Consolidated Statements of Capital (Parenthetical) (USD $)	12 Months Ended
Consolidated Statements of Capital (Parenthetical) (USD $)	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Cash distribution declared, per common share (usd per share)	$1.49	$1.08	$0.55
SL Green Operating Partnership	'	'	'
Cash distribution declared, per common share (usd per share)	$1.49	$1.08	$0.55

Consolidated_Statements_of_Cas

Consolidated Statements of Cash Flows (USD $)	12 Months Ended
Consolidated Statements of Cash Flows (USD $)	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Operating Activities	'	'	'
Net income	$151,283,000	$209,700,000	$677,122,000
Adjustments to reconcile net income to net cash provided by operating activities:	'	'	'
Depreciation and amortization	357,599,000	351,539,000	292,311,000
Equity in net income from unconsolidated joint ventures	-9,921,000	-76,418,000	-1,583,000
Distributions of cumulative earnings from unconsolidated joint ventures	34,997,000	91,145,000	11,185,000
Equity in net gain on sale of interest in unconsolidated joint venture interest/ real estate	-3,601,000	-37,053,000	-2,918,000
Purchase price fair value adjustment	2,305,000	0	-498,195,000
Depreciable real estate reserves	2,150,000	0	5,789,000
Gain on sale of discontinued operations	-14,900,000	-6,627,000	-46,085,000
Gain on sale of debt securities	0	0	-19,840,000
Loan loss and other investment reserves, net of recoveries	0	564,000	6,722,000
(Loss) gain on sale of investment in marketable securities	0	4,940,000	4,866,000
Loss (gain) on early extinguishment of debt	-10,963,000	-6,978,000	904,000
Deferred rents receivable	-56,739,000	-66,079,000	-87,230,000
Other non-cash adjustments	-37,843,000	-18,868,000	523,000
Changes in operating assets and liabilities:	'	'	'
Restricted cashboperations	2,037,000	-13,812,000	-681,000
Tenant and other receivables	-7,570,000	-10,998,000	-4,720,000
Related party receivables	-917,000	-3,529,000	2,461,000
Deferred lease costs	-52,228,000	-48,368,000	-38,412,000
Other assets	2,904,000	-35,932,000	4,029,000
Accounts payable, accrued expenses and other liabilities	-1,473,000	9,389,000	10,704,000
Deferred revenue and land leases payable	7,157,000	62,000	1,706,000
Net cash provided by operating activities	386,203,000	346,753,000	307,118,000
Investing Activities	'	'	'
Acquisitions of real estate property	-594,595,000	-544,568,000	-446,756,000
Additions to land, buildings and improvements	-196,571,000	-148,148,000	-159,100,000
Escrowed cashbcapital improvements/acquisition deposits	-7,672,000	-70,080,000	29,281,000
Investments in unconsolidated joint ventures	-150,274,000	-215,174,000	-109,920,000
Distributions in excess of cumulative earnings from unconsolidated joint ventures	42,720,000	127,876,000	112,359,000
Net proceeds from disposition of real estate/joint venture interest	227,615,000	178,485,000	160,548,000
Proceeds from sale of marketable securities	-2,370,000	-11,070,000	-40,248,000
Purchases of marketable securities	-11,493,000	-6,660,000	-28,570,000
Other investments	-43,163,000	-36,750,000	537,000
Debt and preferred equity and other investments, net of repayments/participations	102,628,000	-459,454,000	-332,482,000
Net cash used in investing activities	-628,435,000	-1,163,403,000	-733,855,000
Financing Activities	'	'	'
Proceeds from mortgages and other loans payable	1,257,172,000	1,230,167,000	826,000,000
Repayments of mortgages and other loans payable	-1,085,220,000	-688,065,000	-765,378,000
Proceeds from revolving credit facility and senior unsecured notes	1,164,000,000	1,751,480,000	1,901,068,000
Repayments of revolving credit facility and senior unsecured notes	-1,020,215,000	-1,581,554,000	-2,043,144,000
Proceeds from stock options exercised and DRIP issuance	12,971,000	112,743,000	10,211,000
Net proceeds from sale of common stock	290,699,000	201,279,000	516,168,000
Net proceeds from sale of preferred stock	0	221,965,000	0
Redemption of preferred stock	-192,533,000	-200,013,000	0
Sale or purchase of treasury stock	7,120,000	-14,150,000	-5,486,000
Distributions to noncontrolling interests in other partnerships	-14,623,000	-21,946,000	-143,578,000
Contributions from noncontrolling interests in other partnerships	8,164,000	25,894,000	0
Distributions to noncontrolling interests in the Operating Partnership	-4,146,000	-3,296,000	-727,000
Dividends paid on common and preferred stock	-148,407,000	-121,238,000	-63,866,000
Other obligations related to mortgage loan participations	0	5,000,000	35,850,000
Deferred loan costs and capitalized lease obligation	-16,042,000	-49,824,000	-35,019,000
Net cash provided by financing activities	258,940,000	868,442,000	232,099,000
Net increase (decrease) in cash and cash equivalents	16,708,000	51,792,000	-194,638,000
Cash and cash equivalents at beginning of year	189,984,000	138,192,000	332,830,000
Cash and cash equivalents at end of year	206,692,000	189,984,000	138,192,000
Supplemental cash flow disclosures:	'	'	'
Interest paid	325,903,000	322,469,000	277,109,000
Income taxes paid	2,666,000	17,000	138,000
Supplemental Disclosure of Non-Cash Investing and Financing Activities:	'	'	'
Issuance of common stock as deferred compensation	164,000	722,000	699,000
Redemption of units in the Operating Partnership	17,287,000	87,513,000	865,000
Derivative instruments at fair value	636,000	92,000	1,870,000
Assignment of debt investment to joint venture	0	25,362,000	286,571,000
Mortgage assigned to joint venture	0	0	30,000,000
Tenant improvements and capital expenditures payable	502,000	1,738,000	3,990,000
Fair value adjustment to noncontrolling interest in the Operating Partnership	45,618,000	61,238,000	39,040,000
Accrued acquisition liabilities	0	0	34,500,000
Assumption of mortgage loans	84,642,000	0	943,767,000
Consolidation of real estate investments and other adjustments	90,934,000	0	1,156,929,000
Consolidation of real estate investmentsbnoncontrolling interest in other partnerships	0	0	87,264,000
Repayment of mezzanine loans	0	13,750,000	0
Redemption of Series E units	0	31,698,000	0
Repayment of financing receivable	0	28,195,000	0
Investment in joint venture	0	5,135,000	0
Capital leased asset	9,992,000	28,132,000	0
Deconsolidation of a subsidiary	0	104,107,000	0
Transfer to net assets held for sale	0	4,901,000	0
Transfer to liabilities related to net assets held for sale	0	136,000	0
Issuance of preferred units	0	47,550,000	0
SL Green Operating Partnership	'	'	'
Operating Activities	'	'	'
Net income	151,283,000	209,700,000	677,122,000
Adjustments to reconcile net income to net cash provided by operating activities:	'	'	'
Depreciation and amortization	357,599,000	351,539,000	292,311,000
Equity in net income from unconsolidated joint ventures	-9,921,000	-76,418,000	-1,583,000
Distributions of cumulative earnings from unconsolidated joint ventures	34,997,000	91,145,000	11,185,000
Equity in net gain on sale of interest in unconsolidated joint venture interest/ real estate	-3,601,000	-37,053,000	-2,918,000
Purchase price fair value adjustment	2,305,000	0	-498,195,000
Depreciable real estate reserves	2,150,000	0	5,789,000
Gain on sale of discontinued operations	-14,900,000	-6,627,000	-46,085,000
Gain on sale of debt securities	0	0	-19,840,000
Loan loss and other investment reserves, net of recoveries	0	564,000	6,722,000
(Loss) gain on sale of investment in marketable securities	0	4,940,000	4,866,000
Loss (gain) on early extinguishment of debt	-10,963,000	-6,978,000	904,000
Deferred rents receivable	-56,739,000	-66,079,000	-87,230,000
Other non-cash adjustments	-37,843,000	-18,868,000	523,000
Changes in operating assets and liabilities:	'	'	'
Restricted cashboperations	2,037,000	-13,812,000	-681,000
Tenant and other receivables	-7,570,000	-10,998,000	-4,720,000
Related party receivables	-917,000	-3,529,000	2,461,000
Deferred lease costs	-52,228,000	-48,368,000	-38,412,000
Other assets	2,904,000	-35,932,000	4,029,000
Accounts payable, accrued expenses and other liabilities	-1,473,000	9,389,000	10,704,000
Deferred revenue and land leases payable	7,157,000	62,000	1,706,000
Net cash provided by operating activities	386,203,000	346,753,000	307,118,000
Investing Activities	'	'	'
Acquisitions of real estate property	-594,595,000	-544,568,000	-446,756,000
Additions to land, buildings and improvements	-196,571,000	-148,148,000	-159,100,000
Escrowed cashbcapital improvements/acquisition deposits	-7,672,000	-70,080,000	29,281,000
Investments in unconsolidated joint ventures	-150,274,000	-215,174,000	-109,920,000
Distributions in excess of cumulative earnings from unconsolidated joint ventures	42,720,000	127,876,000	112,359,000
Net proceeds from disposition of real estate/joint venture interest	227,615,000	178,485,000	160,548,000
Proceeds from sale of marketable securities	-2,370,000	-11,070,000	-40,248,000
Purchases of marketable securities	-11,493,000	-6,660,000	-28,570,000
Other investments	-43,163,000	-36,750,000	537,000
Debt and preferred equity and other investments, net of repayments/participations	102,628,000	-459,454,000	-332,482,000
Net cash used in investing activities	-628,435,000	-1,163,403,000	-733,855,000
Financing Activities	'	'	'
Proceeds from mortgages and other loans payable	1,257,172,000	1,230,167,000	826,000,000
Repayments of mortgages and other loans payable	-1,085,220,000	-688,065,000	-765,378,000
Proceeds from revolving credit facility and senior unsecured notes	1,164,000,000	1,751,480,000	1,901,068,000
Repayments of revolving credit facility and senior unsecured notes	-1,020,215,000	-1,581,554,000	-2,043,144,000
Proceeds from stock options exercised and DRIP issuance	12,971,000	112,743,000	10,211,000
Net proceeds from sale of common stock	290,699,000	201,279,000	516,168,000
Net proceeds from sale of preferred stock	0	221,965,000	0
Redemption of preferred stock	-192,533,000	-200,013,000	0
Sale or purchase of treasury stock	7,120,000	-14,150,000	-5,486,000
Distributions to noncontrolling interests in other partnerships	-14,623,000	-21,946,000	-143,578,000
Contributions from noncontrolling interests in other partnerships	8,164,000	25,894,000	0
Dividends paid on common and preferred stock	-152,553,000	-124,534,000	-64,593,000
Other obligations related to mortgage loan participations	0	5,000,000	35,850,000
Deferred loan costs and capitalized lease obligation	-16,042,000	-49,824,000	-35,019,000
Net cash provided by financing activities	258,940,000	868,442,000	232,099,000
Net increase (decrease) in cash and cash equivalents	16,708,000	51,792,000	-194,638,000
Cash and cash equivalents at beginning of year	189,984,000	138,192,000	332,830,000
Cash and cash equivalents at end of year	206,692,000	189,984,000	138,192,000
Supplemental cash flow disclosures:	'	'	'
Interest paid	325,903,000	322,469,000	277,109,000
Income taxes paid	2,666,000	17,000	138,000
Supplemental Disclosure of Non-Cash Investing and Financing Activities:	'	'	'
Issuance of common stock as deferred compensation	164,000	722,000	699,000
Issuance of units in the Operating Partnership	24,750,000	42,239,000	62,443,000
Redemption of units in the Operating Partnership	17,287,000	87,513,000	865,000
Derivative instruments at fair value	636,000	92,000	1,870,000
Assignment of debt investment to joint venture	0	25,362,000	286,571,000
Mortgage assigned to joint venture	0	0	30,000,000
Tenant improvements and capital expenditures payable	502,000	1,738,000	3,990,000
Accrued acquisition liabilities	0	0	34,500,000
Assumption of mortgage loans	84,642,000	0	943,767,000
Assumption of mortgage loans	90,934,000	0	1,156,929,000
Consolidation of real estate investments and other adjustments	0	0	87,264,000
Consolidation of real estate investmentsbnoncontrolling interest in other partnerships	0	13,750,000	0
Repayment of mezzanine loans	0	31,698,000	0
Redemption of Series E units	0	28,195,000	0
Investment in joint venture	0	5,135,000	0
Capital leased asset	9,992,000	28,132,000	0
Deconsolidation of a subsidiary	0	104,107,000	0
Transfer to net assets held for sale	0	4,901,000	0
Transfer to liabilities related to net assets held for sale	0	136,000	0
Issuance of preferred units	$0	$47,550,000	$0

Consolidated_Statements_of_Cas1

Consolidated Statements of Cash Flows (Parenthetical) (USD $)	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Quarterly distributions declared, per share (usd per share)	$0.50	$0.33	$0.25
SL Green Operating Partnership	'	'	'
Quarterly distributions declared, per share (usd per share)	$0.50	$0.33	$0.25

Organization_and_Basis_of_Pres

Organization and Basis of Presentation	12 Months Ended
	Dec. 31, 2013
Organization, Consolidation and Presentation of Financial Statements [Abstract]	'
Organization and Basis of Presentation	'
	Organization and Basis of Presentation
	SL Green Realty Corp., which is referred to as the Company or SL Green, a Maryland corporation, and SL Green Operating Partnership, L.P., which is referred to as SLGOP or the Operating Partnership, a Delaware limited partnership, were formed in June 1997 for the purpose of combining the commercial real estate business of S.L. Green Properties, Inc. and its affiliated partnerships and entities. The Operating Partnership received a contribution of interest in the real estate properties, as well as 95% of the economic interest in the management, leasing and construction companies which are referred to as the Service Corporation, a consolidated variable interest entity. All of the management, leasing and construction services with respect to the properties that are wholly-owned by us are conducted through SL Green Management LLC which is 100% owned by the Operating Partnership. The Company has qualified, and expects to qualify in the current fiscal year, as a real estate investment trust, or REIT, under the Internal Revenue Code of 1986, as amended, or the Code, and operates as a self-administered, self-managed REIT. A REIT is a legal entity that holds real estate interests and, through payments of dividends to stockholders, is permitted to minimize the payment of Federal income taxes at the corporate level. Unless the context requires otherwise, all references to "we," "our" and "us" means the Company and all entities owned or controlled by the Company, including the Operating Partnership.
	Substantially all of our assets are held by, and our operations are conducted through, the Operating Partnership. The Company is the sole managing general partner of the Operating Partnership. As of December 31, 2013, noncontrolling investors held, in the aggregate, a 2.96% limited partnership interest in the Operating Partnership. We refer to these interests as the noncontrolling interests in the Operating Partnership. See Note 11, "Noncontrolling Interests on the Company's Consolidated Financial Statements."
	Reckson Associates Realty Corp., or Reckson, and Reckson Operating Partnership, L.P., or ROP, are wholly-owned subsidiaries of the Operating Partnership.
	As of December 31, 2013, we owned the following interests in commercial office buildings in the New York Metropolitan area, primarily in midtown Manhattan, a borough of New York City. Our investments in the New York Metropolitan area also include investments in Brooklyn, Long Island, Westchester County, Connecticut and Northern New Jersey, which are collectively known as the Suburban properties:


	Location		Ownership	Number of	Square Feet (unaudited)	Weighted Average
				Buildings		Occupancy(1) (unaudited)
	Manhattan		Consolidated properties	23	17,306,045	94.5	%

			Unconsolidated properties	9	5,934,434	96.6	%


	Suburban		Consolidated properties	26	4,087,400	79.8	%

			Unconsolidated properties	4	1,222,100	87.2	%

				62	28,549,979	92.5	%

	______________________________________________________________________

	-1	The weighted average occupancy represents the total leased square feet divided by total available rentable square feet.
	As of December 31, 2013, we also owned investments in 16 retail properties encompassing approximately 875,800 square feet (unaudited), 20 development buildings encompassing approximately 3,230,800 square feet (unaudited), four residential buildings encompassing 801 units (approximately 719,900 square feet (unaudited)) and two land interests encompassing approximately 961,400 square feet (unaudited). The Company also has ownership interests in 28 west coast office properties encompassing 52 buildings totaling 3,654,300 square feet (unaudited). In addition, we manage two office buildings owned by third parties and affiliated companies encompassing approximately 626,400 square feet (unaudited). As of December 31, 2013, we also held debt and preferred equity investments with a book value of $1.3 billion.
	Partnership Agreement
	In accordance with the partnership agreement of the Operating Partnership, or the Operating Partnership Agreement, we allocate all distributions and profits and losses in proportion to the percentage of ownership interests of the respective partners. As the managing general partner of the Operating Partnership, we are required to take such reasonable efforts, as determined by us in our sole discretion, to cause the Operating Partnership to distribute sufficient amounts to enable the payment of sufficient dividends by us to minimize any Federal income or excise tax at the Company level. Under the Operating Partnership Agreement, each limited partner has the right to redeem units of limited partnership interests for cash, or if we so elect, shares of SL Green's common stock on a one-for-one basis.

Significant_Accounting_Policie

Significant Accounting Policies	12 Months Ended
	Dec. 31, 2013
Accounting Policies [Abstract]	'
Significant Accounting Policies	'
	Significant Accounting Policies
	Principles of Consolidation
	The consolidated financial statements include our accounts and those of our subsidiaries, which are wholly-owned or controlled by us. Entities which we do not control through our voting interest and entities which are variable interest entities, but where we are not the primary beneficiary, are accounted for under the equity method or as debt and preferred equity investments. See Note 5, "Debt and Preferred Equity Investments" and Note 6, "Investments in Unconsolidated Joint Ventures." All significant intercompany balances and transactions have been eliminated.
	We consolidate a variable interest entity, or VIE, in which we are considered a primary beneficiary. The primary beneficiary is the entity that has (i) the power to direct the activities that most significantly impact the entity's economic performance and (ii) the obligation to absorb losses of the VIE or the right to receive benefits from the VIE that could be significant to the VIE. Included in commercial real estate properties on our consolidated balance sheets for the years ended December 31, 2013 and 2012 are approximately $605.9 million and $607.4 million, respectively, related to our consolidated VIEs. Included in mortgages and other loans payable on our consolidated balance sheets for the years ended December 31, 2013 and 2012 are approximately $370.9 million and $379.6 million, respectively, related to our consolidated VIEs.
	A noncontrolling interest in a consolidated subsidiary is defined as the portion of the equity (net assets) in a subsidiary not attributable, directly or indirectly, to a parent. Noncontrolling interests are required to be presented as a separate component of equity in the consolidated balance sheet and the presentation of net income was modified to require earnings and other comprehensive income to be attributed to controlling and noncontrolling interests.
	We assess the accounting treatment for each joint venture and debt and preferred equity investment. This assessment includes a review of each joint venture or limited liability company agreement to determine which party has what rights and whether those rights are protective or participating. For all VIE's, we review such agreements in order to determine which party has the power to direct the activities that most significantly impact the entity's economic performance. In situations where we or our partner approves, among other things, the annual budget, receives a detailed monthly reporting package from us, meets on a quarterly basis to review the results of the joint venture, reviews and approves the joint venture's tax return before filing, and approves all leases that cover more than a nominal amount of space relative to the total rentable space at each property, we do not consolidate the joint venture as we consider these to be substantive participation rights that result in shared power of the activities that most significantly impact the performance of our joint venture. Our joint venture agreements typically contain certain protective rights such as the requirement of partner approval to sell, finance or refinance the property and the payment of capital expenditures and operating expenditures outside of the approved budget or operating plan.
	Investment in Commercial Real Estate Properties
	Real estate properties are presented at cost less accumulated depreciation and amortization. Costs directly related to the development or redevelopment of properties are capitalized. Ordinary repairs and maintenance are expensed as incurred; major replacements and betterments, which improve or extend the life of the asset, are capitalized and depreciated over their estimated useful lives.
	A property to be disposed of is reported at the lower of its carrying value or its estimated fair value, less its cost to sell. Once an asset is held for sale, depreciation expense is no longer recorded and the historic results are reclassified as discontinued operations. See Note 4, "Property Dispositions."
	Properties are depreciated using the straight-line method over the estimated useful lives of the assets. The estimated useful lives are as follows:


	Category		Term
	Building (fee ownership)		40 years
	Building improvements		shorter of remaining life of the building or useful life
	Building (leasehold interest)		lesser of 40 years or remaining term of the lease
	Property under capital lease		remaining lease term
	Furniture and fixtures		four to seven years
	Tenant improvements		shorter of remaining term of the lease or useful life
	Depreciation expense (including amortization of the capital lease asset) amounted to approximately $309.4 million, $301.0 million and $249.0 million for the years ended December 31, 2013, 2012 and 2011, respectively.
	On a periodic basis, we assess whether there are any indications that the value of our real estate properties may be impaired or that their carrying value may not be recoverable. A property's value is considered impaired if management's estimate of the aggregate future cash flows (undiscounted and without interest charges for consolidated properties) to be generated by the property is less than the carrying value of the property. To the extent impairment has occurred, the loss will be measured as the excess of the carrying amount of the property over the calculated fair value of the property. We do not believe that the values of any of our consolidated properties were impaired at December 31, 2013.
	We also evaluate our real estate properties for potential impairment when a real estate property has been classified as held for sale. Real estate assets held for sale are valued at the lower of their carrying value or fair value less costs to sell. In June 2013, we recorded a $2.2 million impairment charge in connection with the sale of 300 Main Street in Stamford, Connecticut.
	A variety of costs are incurred in the development and leasing of our properties. After determination is made to capitalize a cost, it is allocated to the specific component of a project that is benefited. Determination of when a development project is substantially complete and capitalization must cease involves a degree of judgment. The costs of land and building under development include specifically identifiable costs. The capitalized costs include, but are not limited to, pre-construction costs essential to the development of the property, development costs, construction costs, interest costs, real estate taxes, salaries and related costs and other costs incurred during the period of development. We consider a construction project as substantially completed and held available for occupancy upon the completion of tenant improvements, but no later than one year from cessation of major construction activity. We cease capitalization on the portions substantially completed and occupied or held available for occupancy, and capitalize only those costs associated with the portions under construction.
	Results of operations of properties acquired are included in the consolidated statements of income from the date of acquisition.
	We recognize the assets acquired, liabilities assumed (including contingencies) and any noncontrolling interests in an acquired entity at their fair values on the acquisition date. We expense acquisition-related transaction costs as incurred, which are included in transaction related costs on our consolidated statements of income.
	When we acquire our partner's equity interest in an existing unconsolidated joint venture and gain control over the investment, we record the consolidated investment at fair value. The difference between the book value of our equity investment on the purchase date and our share of the fair value of the investment's purchase price is recorded as a purchase price fair value adjustment in our consolidated statements of income. In April 2013, we recognized a purchase price fair value adjustment of $(2.3) million in connection with the consolidation of 16 Court Street, which was previously accounted for as an investment in unconsolidated joint venture.
	We allocate the purchase price of real estate to land and building (inclusive of tenant improvements) and, if determined to be material, intangibles, such as the value of above- and below-market leases and origination costs associated with the in-place leases. We depreciate the amount allocated to building (inclusive of tenant improvements) and other intangible assets over their estimated useful lives, which generally range from three to 40 years and from one to 14 years, respectively. The values of the above- and below-market leases are amortized and recorded as either an increase (in the case of below-market leases) or a decrease (in the case of above-market leases) to rental income over the remaining term of the associated lease, which generally range from one to 14 years. The value associated with in-place leases is amortized over the expected term of the associated lease, which generally ranges from one to 14 years. If a tenant vacates its space prior to the contractual termination of the lease and no rental payments are being made on the lease, any unamortized balance of the related intangible will be written off. The tenant improvements and origination costs are amortized as an expense over the remaining life of the lease (or charged against earnings if the lease is terminated prior to its contractual expiration date). We assess fair value of the leases based on estimated cash flow projections that utilize appropriate discount and capitalization rates and available market information. Estimates of future cash flows are based on a number of factors including the historical operating results, known trends, and market/economic conditions that may affect the property. To the extent acquired leases contain fixed rate renewal options that are below market and determined to be material, we amortize such below market lease value into rental income over the renewal period.
	We recognized an increase of approximately $13.5 million, $10.4 million and $19.6 million in rental revenue for the years ended December 31, 2013, 2012 and 2011, respectively, for the amortization of aggregate below-market leases in excess of above-market leases and a reduction in lease origination costs, resulting from the allocation of the purchase price of the applicable properties. The increase in rental revenue for the year ended December 31, 2013 is net of approximately $6.8 million resulting from the write-off of above-market and in-place balances associated with a former tenant. We recognized a reduction in interest expense for the amortization of the above-market rate mortgages assumed of approximately $5.3 million, $1.8 million and $5.9 million for the years ended December 31, 2013, 2012 and 2011, respectively.
	The following summarizes our identified intangible assets (acquired above-market leases and in-place leases) and intangible liabilities (acquired below-market leases) as of December 31, 2013 and 2012 (in thousands):


		December 31,
		2013				2012
	Identified intangible assets (included in other assets):
	Gross amount	$	746,704			$	725,861

	Accumulated amortization	(343,339		)		(263,107		)
	Net	$	403,365			$	462,754

	Identified intangible liabilities (included in deferred revenue):
	Gross amount	$	671,380			$	651,921

	Accumulated amortization	(429,138		)		(357,225		)
	Net	$	242,242			$	294,696

	The estimated annual amortization of acquired below-market leases, net of acquired above-market leases (a component of rental revenue), for each of the five succeeding years is as follows (in thousands):


	2014	$	(1,984	)
	2015	(2,464		)
	2016	(4,632		)
	2017	(3,758		)
	2018	(4,763		)
	The estimated annual amortization of all other identifiable assets (a component of depreciation and amortization expense) including tenant improvements for each of the five succeeding years is as follows (in thousands):


	2014	$	14,938

	2015	10,387

	2016	6,878

	2017	5,482

2018	3,978

Cash and Cash Equivalents
We consider all highly liquid investments with maturity of three months or less when purchased to be cash equivalents.
Fair Value Measurements
Refer to Note 17, "Fair Value Measurements," in the accompanying notes to consolidated financial statements.
Investment in Marketable Securities
We invest in marketable securities. At the time of purchase, we are required to designate a security as held-to-maturity, available-for-sale, or trading depending on ability and intent. We do not have any securities designated as held-to-maturity or trading at this time. Securities available-for-sale are reported at fair value pursuant to ASC 820-10, with the net unrealized gains or losses reported as a component of accumulated other comprehensive loss. Unrealized losses that are determined to be other-than-temporary are recognized in earnings up to their credit component.
The cost of bonds and marketable securities sold was determined using the specific identification method.
At December 31, 2013 and 2012, we held the following marketable securities (in thousands):


	December 31,
	2013				2012
Equity marketable securities	$	4,307			$	2,202

Commercial mortgage-backed securities	24,419				15,575

Rake bonds	3,323				3,652

Total marketable securities available-for-sale	$	32,049			$	21,429

Our equity marketable securities represent our investment in Gramercy Capital Corp., which was renamed Gramercy Property Trust Inc. (NYSE: GPT), or Gramercy, in April 2013. Marc Holliday, our chief executive officer, remains a board member of Gramercy. As we no longer have any significant influence over Gramercy, we account for our investment as available-for-sale securities.
The cost basis of the commercial mortgage-backed securities was $23.0 million and $13.7 million at December 31, 2013 and 2012, respectively.
The cost basis of the rake bonds was $3.6 million and $3.7 million at December 31, 2013 and 2012, respectively. These bonds mature at various times through 2030.
There were no sales of any of our marketable securities during the year ended December 31, 2013. During the years ended December 31, 2012 and 2011, we disposed of some of our shares in Gramercy for aggregate net proceeds of $6.8 million and $6.2 million and realized gains of $4.9 million and $4.5 million, respectively, which are included in gain on sale of investment in marketable securities on the consolidated statements of income. During the year ended December 31, 2011, we sold $22.5 million of rake bonds and realized a gain of $0.4 million, which are also included in gain on sale of investment in marketable securities on the consolidated statements of income.
Investments in Unconsolidated Joint Ventures
We account for our investments in unconsolidated joint ventures under the equity method of accounting in cases where we exercise significant influence over, but do not control, these entities and are not considered to be the primary beneficiary. We consolidate those joint ventures that we control or which are VIEs and where we are considered to be the primary beneficiary. In all these joint ventures, the rights of the joint venture partner are both protective as well as participating. Unless we are determined to be the primary beneficiary in a VIE, these participating rights preclude us from consolidating these non-VIE entities. These investments are recorded initially at cost, as investments in unconsolidated joint ventures, and subsequently adjusted for equity in net income (loss) and cash contributions and distributions. Equity income (loss) from unconsolidated joint ventures is allocated based on our ownership or economic interest in each joint venture. When a capital event (as defined in each joint venture agreement) such as a refinancing occurs, if return thresholds are met, future equity income will be allocated at our increased economic interest. We recognize incentive income from unconsolidated real estate joint ventures as income to the extent it is earned and not subject to a clawback feature. Distributions we receive from unconsolidated real estate joint ventures in excess of our basis in the investment are recorded as offsets to our investment balance if we remain liable for future obligations of the joint venture or may otherwise be committed to provide future additional financial support. None of the joint venture debt is recourse to us, except for $218.4 million which we guarantee at two joint ventures and performance guarantees under master leases at two other joint ventures. See Note 6, "Investments in Unconsolidated Joint Ventures."
We assess our investments in unconsolidated joint ventures for recoverability, and if it is determined that a loss in value of the investment is other than temporary, we write down the investment to its fair value. We evaluate our equity investments for impairment based on the joint venture's projected discounted cash flows. During the year ended December 31, 2011, we recorded a $5.8 million impairment charge on one of our equity investments, which we sold in July 2012. These charges are included in depreciable real estate reserves in the consolidated statements of income. See Note 6, "Investments in Unconsolidated Joint Ventures." We do not believe that the values of any of our equity investments were impaired at December 31, 2013.
Restricted Cash
Restricted cash primarily consists of security deposits held on behalf of our tenants, interest reserves, as well as capital improvement and real estate tax escrows required under certain loan agreements.
Deferred Lease Costs
Deferred lease costs consist of fees and direct costs incurred to initiate and renew operating leases and are amortized on a straight-line basis over the related lease term. Certain of our employees provide leasing services to the wholly-owned properties. Approximately $12.4 million, $11.0 million and $9.6 million of their compensation for the years ended December 31, 2013, 2012 and 2011, respectively, was capitalized and is amortized over an estimated average lease term of seven years.
Deferred Financing Costs
Deferred financing costs represent commitment fees, legal, title and other third party costs associated with obtaining commitments for financing which result in a closing of such financing. These costs are amortized over the terms of the respective agreements. Unamortized deferred financing costs are expensed when the associated debt is refinanced or repaid before maturity. Costs incurred in seeking financing transactions, which do not close, are expensed in the period in which it is determined that the financing will not close.
Revenue Recognition
Rental revenue is recognized on a straight-line basis over the term of the lease. Rental revenue recognition commences when the tenant takes possession or controls the physical use of the leased space. In order for the tenant to take possession, the leased space must be substantially ready for its intended use. To determine whether the leased space is substantially ready for its intended use, management evaluates whether we are or the tenant is the owner of tenant improvements for accounting purposes. When management concludes that we are the owner of tenant improvements, rental revenue recognition begins when the tenant takes possession of the finished space, which is when such tenant improvements are substantially complete. In certain instances, when management concludes that we are not the owner (the tenant is the owner) of tenant improvements, rental revenue recognition begins when the tenant takes possession of or controls the space. When management concludes that we are the owner of tenant improvements for accounting purposes, we record amounts funded to construct the tenant improvements as a capital asset. For these tenant improvements, we record amounts reimbursed by tenants as a reduction of the capital asset. When management concludes that the tenant is the owner of tenant improvements for accounting purposes, we record our contribution towards those improvements as a lease incentive, which is included in deferred leasing costs on our consolidated balance sheets and amortized as a reduction to rental revenue on a straight-line basis over the term of the lease. The excess of rents recognized over amounts contractually due pursuant to the underlying leases are included in deferred rents receivable on the consolidated balance sheets. We establish, on a current basis, an allowance for future potential tenant credit losses, which may occur against this account. The balance reflected on the consolidated balance sheet is net of such allowance.
In addition to base rent, our tenants also generally will pay their pro rata share of increases in real estate taxes and operating expenses for the building over a base year. In some leases, in lieu of paying additional rent based upon increases in building operating expenses, the tenant will pay additional rent based upon increases in the wage rate paid to porters over the porters' wage rate in effect during a base year or increases in the consumer price index over the index value in effect during a base year. In addition, many of our leases contain fixed percentage increases over the base rent to cover escalations. Electricity is most often supplied by the landlord either on a sub-metered basis, or rent inclusion basis (i.e., a fixed fee is included in the rent for electricity, which amount may increase based upon increases in electricity rates or increases in electrical usage by the tenant). Base building services other than electricity (such as heat, air conditioning and freight elevator service during business hours, and base building cleaning) are typically provided at no additional cost, with the tenant paying additional rent only for services which exceed base building services or for services which are provided outside normal business hours. These escalations are based on actual expenses incurred in the prior calendar year. If the expenses in the current year are different from those in the prior year, then during the current year, the escalations will be adjusted to reflect the actual expenses for the current year.
We record a gain on sale of real estate when title is conveyed to the buyer, subject to the buyer's financial commitment being sufficient to provide economic substance to the sale and we have no substantial economic involvement with the buyer.
Interest income on debt and preferred equity investments is recognized over the life of the investment using the effective interest method and recognized on the accrual basis. Fees received in connection with loan commitments are deferred until the loan is funded and are then recognized over the term of the loan as an adjustment to yield. Anticipated exit fees, whose collection is expected, are also recognized over the term of the loan as an adjustment to yield. Fees on commitments that expire unused are recognized at expiration.
Income recognition is generally suspended for debt and preferred equity investments at the earlier of the date at which payments become 90 days past due or when, in the opinion of management, a full recovery of interest income becomes doubtful. Interest income recognition is resumed when the loan becomes contractually current and performance is demonstrated to be resumed. Interest is recorded as income on impaired loans only to the extent cash is received. Several of the debt and preferred equity investments provide for accrual of interest at specified rates, which differ from current payment terms. Interest is recognized on such loans at the accrual rate subject to management's determination that accrued interest are ultimately collectible, based on the underlying collateral and operations of the borrower. If management cannot make this determination, interest income above the current pay rate is recognized only upon actual receipt.
If we purchase a debt or preferred equity investment at a discount, intend to hold it until maturity and expect to recover the full value of the investment, we accrete the discount into income as an adjustment to yield over the term of the investment. If we purchase a debt or preferred equity investment at a discount with the intention of foreclosing on the collateral, we do not accrete the discount.
Asset management fees are recognized on a straight-line basis over the term of the asset management agreement.
Allowance for Doubtful Accounts
We maintain an allowance for doubtful accounts for estimated losses resulting from the inability of our tenants to make required payments. If the financial condition of a specific tenant were to deteriorate, resulting in an impairment of its ability to make payments, additional allowances may be required.
Reserve for Possible Credit Losses
The expense for possible credit losses in connection with debt and preferred equity investments is the charge to earnings to increase the allowance for possible credit losses to the level that we estimate to be adequate, based on Level 3 data, considering delinquencies, loss experience and collateral quality. Other factors considered relate to geographic trends and product diversification, the size of the portfolio and current economic conditions. Based upon these factors, we establish the provision for possible credit loss on each individual investment. When it is probable that we will be unable to collect all amounts contractually due, the investment is considered impaired.
Where impairment is indicated on an investment that is held to maturity, a valuation allowance is measured based upon the excess of the recorded investment amount over the net fair value of the collateral. Any deficiency between the carrying amount of an asset and the calculated value of the collateral is charged to expense. The write off of the reserve balance is called a charge off. We continue to assess or adjust our estimates based on circumstances of a loan and the underlying collateral. If the additional information obtained reflects increased recovery of our investment, we will adjust our reserves accordingly. There were no additional loan reserves recorded during the year ended December 31, 2013. We recorded loan loss reserves of $3.0 million and $10.9 million on investments being held to maturity during the years ended December 31, 2012 and 2011, respectively. We also recorded recoveries of approximately $2.4 million and $4.4 million during the years ended December 31, 2012 and 2011, respectively, in connection with the sale of our investments. This is included in loan loss and other investment reserves, net of recoveries on the consolidated statements of income.
Debt and preferred equity investments held for sale are carried at the lower of cost or fair market value using available market information obtained through consultation with dealers or other originators of such investments as well as discounted cash flow models based on Level 3 data pursuant to ASC 820-10. As circumstances change, management may conclude not to sell an investment designated as held for sale. In such situations, the investment will be reclassified at its net carrying value to debt and preferred equity investments held to maturity. For these reclassified investments, the difference between the current carrying value and the expected cash to be collected at maturity will be accreted into income over the remaining term of the investment.
Rent Expense
Rent expense is recognized on a straight-line basis over the initial term of the lease. The excess of the rent expense recognized over the amounts contractually due pursuant to the underlying lease is included in the deferred land lease payable on the consolidated balance sheets.
Income Taxes
SL Green is taxed as a REIT under Section 856(c) of the Code. As a REIT, SL Green generally is not subject to Federal income tax. To maintain its qualification as a REIT, SL Green must distribute at least 90% of its REIT taxable income to its stockholders and meet certain other requirements. If SL Green fails to qualify as a REIT in any taxable year, we will be subject to Federal income tax on SL Green's taxable income at regular corporate rates. SL Green may also be subject to certain state, local and franchise taxes. Under certain circumstances, Federal income and excise taxes may be due on SL Green's undistributed taxable income.
The Operating Partnership is a partnership and, as a result, all income and losses of the partnership are allocated to the partners for inclusion in their respective income tax returns. The only provision for income taxes included in the consolidated statements of income relates to the Operating Partnership’s consolidated taxable REIT subsidiaries. We may also be subject to certain state, local and franchise taxes.
Pursuant to amendments to the Code that became effective January 1, 2001, we have elected, and may elect in the future, to treat certain of our existing or newly created corporate subsidiaries as taxable REIT subsidiaries, or a TRS. In general, a TRS may perform non-customary services for the tenants of the Company, hold assets that we cannot hold directly and generally may engage in any real estate or non-real estate related business. The TRS generates income, resulting in Federal and state income tax liability for these entities.
During the year ended December 31, 2013, we recorded Federal, state and local tax provision of $4.4 million. There were no Federal, state and local tax provisions for the years ended December 31, 2012 and 2011.
We follow a two-step approach for evaluating uncertain tax positions. Recognition (step one) occurs when an enterprise concludes that a tax position, based solely on its technical merits, is more-likely-than-not to be sustained upon examination. Measurement (step two) determines the amount of benefit that is more-likely-than-not to be realized upon settlement. Derecognition of a tax position that was previously recognized would occur when a company subsequently determines that a tax position no longer meets the more-likely-than-not threshold of being sustained. The use of a valuation allowance as a substitute for derecognition of tax positions is prohibited.
Underwriting Commissions and Costs
Underwriting commissions and costs incurred in connection with our stock offerings are reflected as a reduction of additional paid-in-capital.
Exchangeable Debt Instruments
The initial proceeds from exchangeable debt that may be settled in cash, including partial cash settlements, must be bifurcated between a liability component and an equity component associated with the embedded conversion option. The objective of the accounting guidance is to require the liability and equity components of exchangeable debt to be separately accounted for in a manner such that the interest expense on the exchangeable debt is not recorded at the stated rate of interest but rather at an effective rate that reflects the issuer's conventional debt borrowing rate at the date of issuance. We calculate the liability component of exchangeable debt based on the present value of the contractual cash flows discounted at our comparable market conventional debt borrowing rate at the date of issuance. The difference between the principal amount and the fair value of the liability component is reported as a discount on the exchangeable debt that is accreted as additional interest expense from the issuance date through the contractual maturity date using the effective interest method. A portion of this additional interest expense may be capitalized to the development and redevelopment balances qualifying for interest capitalization each period. The liability component of the exchangeable debt is reported net of discounts on our consolidated balance sheets. We calculate the equity component of exchangeable debt based on the difference between the initial proceeds received from the issuance of the exchangeable debt and the fair value of the liability component at the issuance date. The equity component is included in additional paid-in-capital, net of issuance costs, on our consolidated balance sheets. We allocate issuance costs for exchangeable debt between the liability and the equity components based on their relative values.
Stock-Based Employee Compensation Plans
We have a stock-based employee compensation plan, described more fully in Note 14, "Share-based Compensation."
Our stock options are recorded at fair value at the time of issuance. Fair value of the stock options is determined using the Black-Scholes option pricing model. The Black-Scholes model was developed for use in estimating the fair value of traded options, which have no vesting restrictions and are fully transferable. In addition, option valuation models require the input of highly subjective assumptions including the expected stock price volatility. Because our plan has characteristics significantly different from those of traded options and because changes in the subjective input assumptions can materially affect the fair value estimate, in our opinion, the existing models do not necessarily provide a reliable single measure of the fair value of our employee stock options.
Compensation cost for stock options, if any, is recognized ratably over the vesting period of the award. Our policy is to grant options with an exercise price equal to the quoted closing market price of our stock on the grant date. Awards of stock or restricted stock are expensed as compensation over the benefit period based on the fair value of the stock on the grant date.
For share-based awards with a performance or market measure, we recognize compensation cost over the requisite service period, using the accelerated attribution expense method. The requisite service period begins on the date the compensation committee of SL Green's board of directors authorizes the award, adopts any relevant performance measures and communicates the award to the employees. For programs with performance measures, the total estimated compensation cost is based on the fair value of the award at the applicable reporting date estimated using a binomial model. For share-based awards for which there is no pre-established performance measure, we recognize compensation cost over the service vesting period, which represents the requisite service period, on a straight-line basis. In accordance with the provisions of our share-based incentive compensation plans, we accept the return of shares of the Company's common stock, at the current quoted market price, from certain key employee to satisfy minimum statutory tax-withholding requirements related to shares that vested during the period.
Awards can also be made in the form of a separate series of units of limited partnership interest in the Operating Partnership called long-term incentive plan units, or LTIP units. LTIP units, which can be granted either as free-standing awards or in tandem with other awards under our stock incentive plan, are valued by reference to the value of the Company's common stock at the time of grant, and are subject to such conditions and restrictions as the compensation committee of the Company's board of directors may determine, including continued employment or service, computation of financial metrics and/or achievement of pre-established performance goals and objectives.
Derivative Instruments
In the normal course of business, we use a variety of commonly used derivative instruments, such as interest rate swaps, caps, collar and floors, to manage, or hedge, interest rate risk. We require that hedging derivative instruments are effective in reducing the interest rate risk exposure that they are designated to hedge. This effectiveness is essential for qualifying for hedge accounting. Some derivative instruments are associated with an anticipated transaction. In those cases, hedge effectiveness criteria also require that it be probable that the underlying transaction occurs. Instruments that meet these hedging criteria are formally designated as hedges at the inception of the derivative contract.
To determine the fair values of derivative instruments, we use a variety of methods and assumptions that are based on market conditions and risks existing at each balance sheet date. For the majority of financial instruments including most derivatives, long-term investments and long-term debt, standard market conventions and techniques such as discounted cash flow analysis, option pricing models, replacement cost, and termination cost are used to determine fair value. All methods of assessing fair value result in a general approximation of value, and such value may never actually be realized.
In the normal course of business, we are exposed to the effect of interest rate changes and limit these risks by following established risk management policies and procedures including the use of derivatives. To address exposure to interest rates, derivatives are used primarily to fix the rate on debt based on floating-rate indices and manage the cost of borrowing obligations.
We use a variety of commonly used derivative products that are considered plain vanilla derivatives. These derivatives typically include interest rate swaps, caps, collars and floors. We expressly prohibit the use of unconventional derivative instruments and using derivative instruments for trading or speculative purposes. Further, we have a policy of only entering into contracts with major financial institutions based upon their credit ratings and other factors.
We may employ swaps, forwards or purchased options to hedge qualifying forecasted transactions. Gains and losses related to these transactions are deferred and recognized in net income as interest expense in the same period or periods that the underlying transaction occurs, expires or is otherwise terminated.
Hedges that are reported at fair value and presented on the balance sheet could be characterized as cash flow hedges or fair value hedges. Interest rate caps and collars are examples of cash flow hedges. Cash flow hedges address the risk associated with future cash flows of interest payments. For all hedges held by us and which were deemed to be fully effective in meeting the hedging objectives established by our corporate policy governing interest rate risk management, no net gains or losses were reported in earnings. The changes in fair value of hedge instruments are reflected in accumulated other comprehensive income. For derivative instruments not designated as hedging instruments, the gain or loss, resulting from the change in the estimated fair value of the derivative instruments, is recognized in current earnings during the period of change.
Earnings per Share of the Company
We present both basic and diluted earnings per share, or EPS. Basic EPS excludes dilution and is computed by dividing net income attributable to common stockholders by the weighted average number of common shares outstanding during the period. Basic EPS includes participating securities, consisting of unvested restricted stock that receive nonforfeitable dividends similar to shares of common stock. Diluted EPS reflects the potential dilution that could occur if securities or other contracts to issue common stock were exercised or converted into common stock, where such exercise or conversion would result in a lower EPS amount. Diluted EPS also includes units of limited partnership interest. The dilutive effect of stock options is reflected in the weighted average diluted outstanding shares calculation by application of the treasury stock method. There is no dilutive effect for the exchangeable senior debentures as the conversion premium will be paid in cash.
Earnings per Unit of the Operating Partnership
The Operating Partnership presents both basic and diluted earnings per unit, or EPU. Basic EPU excludes dilution and is computed by dividing net income attributable to common unitholders by the weighted average number of common units outstanding during the period. Basic EPU includes participating securities, consisting of unvested restricted units that receive nonforfeitable dividends similar to shares of common units. Diluted EPU reflects the potential dilution that could occur if securities or other contracts to issue common units were exercised or converted into common units, where such exercise or conversion would result in a lower EPU amount. The dilutive effect of unit options is reflected in the weighted average diluted outstanding units calculation by application of the treasury stock method. There is no dilutive effect for the exchangeable senior notes as the conversion premium will be paid in cash.
Use of Estimates
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.
Concentrations of Credit Risk
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 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 7.5%, 6.6% and 6.1% of our share of annualized cash rent, respectively, no other tenant in our portfolio accounted for more than 2.2% of our annualized cash rent, including our share of joint venture annualized rent, at December 31, 2013. Approximately 10.6%, 7.8%, 7.7% and 6.4% of our annualized cash rent for consolidated properties was attributable to 1515 Broadway, 919 Third Avenue, 1185 Avenue of the Americas and One Madison Avenue, respectively, for the year ended December 31, 2013. Approximately 10.2%, 8.0%, 7.1% and 6.2% of our annualized cash rent for consolidated properties was attributable to 1515 Broadway, 919 Third Avenue, 1185 Avenue of the Americas and One Madison Avenue, respectively, for the year ended December 31, 2012. Approximately 10.3%, 8.3%, 7.2%, and 6.5% of our annualized rent for consolidated properties was attributable to 1515 Broadway, 919 Third Avenue, 1185 Avenue of the Americas and One Madison Avenue, respectively, for the year ended December 31, 2011. In addition, three debt and preferred equity investments accounted for more than 10.0% of the income earned on debt and preferred equity investments during 2013. As of December 31, 2013, approximately 73.9% of our workforce is covered by three collective bargaining agreements. Approximately 77.3% of our workforce which services substantially all of our properties is covered by a collective bargaining agreement which expires in 2015. See Note 20, "Benefits Plans."
Reclassification
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, to reclassify deferred origination fees from deferred income to debt and preferred equity investments and to reclassify contingent liabilities relating to operating escalation reimbursements from tenant and other receivables, net of allowance to accrued interest and other liabilities.
Accounting Standards Updates
In May 2011, the FASB issued updated guidance on fair value measurement which amends U.S. GAAP to conform to IFRS measurement and disclosure requirements. The amendments change the wording used to describe the requirements in U.S. GAAP for measuring fair value, changes certain fair value measurement principles and enhances disclosure requirements. This guidance was effective as of the first quarter of 2012, and its adoption did not have a material impact on our consolidated financial statements.
In December 2011, the FASB issued guidance that concluded when a parent ceases to have a controlling financial interest in a subsidiary that is in-substance real estate as a result of default on the subsidiary's nonrecourse debt, the reporting entity must apply the accounting guidance for sales of real estate to determine whether it should derecognize the in-substance real estate. The reporting entity is precluded from derecognizing the real estate until legal ownership has been transferred to the lender to satisfy the debt. The guidance was effective for calendar year-end public and nonpublic companies in 2013 and is to be applied on a prospective basis. Early adoption of the guidance is permitted. Adoption of this guidance did not have a material impact on our consolidated financial statements.
In February 2013, the FASB issued guidance on the presentation and disclosure of reclassification adjustments out of accumulated other comprehensive income, or AOCI. The standard requires an entity to present information about significant items reclassified out of AOCI by component either on the face of the statement where net income is presented or as a separate disclosure in the notes to financial statements. The guidance was effective for calendar year-end public companies beginning in the first quarter of 2013 and its adoption did not have a material impact on our consolidated financial statements.

Property_Acquisitions

Property Acquisitions	12 Months Ended
	Dec. 31, 2013
Business Combinations [Abstract]	'
Property Acquisitions	'
	Property Acquisitions
	2013 Acquisitions
	In November 2013, we acquired a 492,987 square foot (unaudited) mixed-use residential and commercial property, consisting of 333 apartment units and 270,132 square foot (unaudited) of commercial space, located at 315 West 33rd Street for $386.8 million.
	In November 2013, we acquired the aggregate 66,692 square foot (unaudited) assemblage of retail development properties located on Fifth Avenue for $146.0 million.
	In April 2013, we acquired interests from our joint venture partner, City Investment Fund, or CIF, in 16 Court Street in Brooklyn for $4.0 million. We have consolidated the ownership of the 318,000 square foot (unaudited) building. The transaction valued the consolidated interest at $96.2 million, inclusive of the $84.6 million mortgage encumbering the property. We recognized a purchase price fair value adjustment of $(2.3) million upon the closing of this transaction. This property, which we initially acquired in July 2007, was previously accounted for as an investment in unconsolidated joint ventures.
	In March 2013, we, along with Magnum Real Estate Group, acquired 84 residential apartment units, consisting of 72 apartment units and 12 townhouses, located at 248-252 Bedford Avenue, Williamsburg, Brooklyn for $54.9 million. Simultaneous with the closing, the joint venture closed on a five-year $22.0 million mortgage loan which carries a floating rate of interest of 225 basis points over LIBOR. The property is above a commercial property already owned by us. We hold a 90.0% controlling interest in this joint venture.
	The following summarizes our allocation of the purchase price of the assets acquired and liabilities assumed upon the closing of these 2013 acquisitions (in thousands):



		315 West 33 Street(1)		Assemblage of Retail Development Properties on Fifth Avenue(1)			16 Court			248-252
										Bedford
										Avenue
	Land	$	116,033	$	43,800		$	19,217		$	10,865

	Building and building leasehold	270,742		102,200			63,210			44,035

	Above market lease value	—		—			5,122			—

	Acquired in-place leases	—		—			9,422			—

	Other assets, net of other liabilities	—		—			3,380			—

	Assets acquired	386,775		146,000			100,351			54,900

	Mark-to-market assumed debt	—		—			294			—

	Below market lease value	—		—			3,885			—

	Liabilities assumed	—		—			4,179			—

	Purchase price allocation	$	386,775	$	146,000		$	96,172		$	54,900

	Net consideration funded by us at closing, excluding consideration financed by debt	$	386,775	$	146,000		$	4,000		$	21,782

	Equity and/or debt investment held	$	—	$	—		$	13,835		$	—

	Debt assumed	$	—	$	—		$	84,642		$	—

	______________________________________________________________________

	-1	We are currently in the process of analyzing the purchase price allocation and, as such, we have not allocated any value to intangible assets such as above- and below-market lease or in-place leases.
	2012 Acquisitions
	In December 2012, we acquired the aggregate 42,000 square foot (unaudited) vacant retail buildings located at 985-987 Third Avenue for $18.0 million.
	In December 2012, we acquired a 68,000 square foot (unaudited) mixed-use retail, office and residential building located at 131-137 Spring Street for $122.3 million.
	In October 2012, we, along with Stonehenge Partners, acquired a 99-year leasehold position covering an 82,250 square foot (unaudited), 96 unit residential building located at 1080 Amsterdam Avenue, which we are developing into a luxury residential building.
	In September 2012, we acquired the aggregate 267,000 square foot (unaudited) office buildings located at 635 and 641 Sixth Avenue for $173.0 million.
	In June 2012, we acquired a 215,000 square foot (unaudited) office building located at 304 Park Avenue South for $135.0 million. The property was acquired with approximately $102.0 million in cash and $33.0 million in units of limited partnership interest of the Operating Partnership.
	In October 2011, we formed a joint venture with Stonehenge Partners and, in January 2012, we acquired five retail and two multifamily properties in Manhattan for $193.1 million, inclusive of the issuance of $47.6 million aggregate liquidation preference of 4.5% Series G Preferred Units of limited partnership interest of the Operating Partnership. Simultaneous with the closing, we financed the multifamily component, which encompasses 385 units and 488,000 square feet (unaudited), with an aggregate 12 years $100.0 million fixed rate mortgage which bears interest at 4.1% and one of the retail properties financed with a 5-year $8.5 million fixed rate mortgage which bears interest at 3.8%. We hold an 80.0% interest in this joint venture which we consolidate as it is a VIE and we have been designated as the primary beneficiary. In February 2013, we sold one of the retail properties, which is further described in Note 4, "Property Dispositions."
	The following summarizes our allocation of the purchase price of the assets acquired and liabilities assumed upon the closing of these 2012 acquisitions (in thousands):


		985-987 Third Avenue			131-137 Spring Street				635-641				304 Park			Stonehenge
									Sixth				Avenue			Properties
									Avenue				South
	Land	$	5,400		$	27,021			$	69,848			$	54,189		$	65,533

	Building and building leasehold	12,600			105,342				104,474				75,619			128,457

	Above market lease value	—			179				—				2,824			594

	Acquired in-place leases	—			7,046				7,727				8,265			9,573

Other assets, net of other liabilities	—			—				—				—			2,190

Assets acquired	18,000			139,588				182,049				140,897			206,347

Fair value adjustment to mortgage note payable	—			—				—				—			—

Below market lease value	—			17,288				9,049				5,897			13,239

Liabilities assumed	—			17,288				9,049				5,897			13,239

Purchase price allocation	$	18,000		$	122,300			$	173,000			$	135,000		$	193,108

Net consideration funded by us at closing, excluding consideration financed by debt	$	18,000		$	122,300			$	173,000			$	135,000		$	78,121

Equity and/or debt investment held	$	—		$	—			$	—			$	—		$	—

Debt assumed	$	—		$	—			$	—			$	—		$	—

2011 Acquisitions
In November 2011, we acquired all of the interests in 51 East 42nd Street, a 142,000 square foot (unaudited) office building for approximately $80.0 million, inclusive of the issuance of $2.0 million, aggregate liquidation preference of 6.0% Series H Preferred Units of limited partnership interest of the Operating Partnership.
In November 2011 we, along with The Moinian Group, formed a joint venture to recapitalize 180 Maiden Lane, a fully-leased, 1.1 million square foot (unaudited) Class A office tower. The consideration for our 49.9% stake in the joint venture included $41.0 million in cash and common units of limited partnership interest of the Operating Partnership valued at $31.7 million. The transaction valued the property at $442.3 million. In connection with the issuance of these Operating Partnership units, we recorded an $8.3 million fair value adjustment due to changes in our stock price. Simultaneous with the closing of the recapitalization, the joint venture refinanced the existing $344.2 million indebtedness with a five-year $280.0 million mortgage. We consolidate this joint venture, which is a VIE in which we have been designated as the primary beneficiary, as a result of the control we exert over leasing activities at the property.
In May 2011, we acquired a substantial ownership interest in the 205,000 square foot (unaudited) office condominium at 110 East 42nd Street, along with control of the asset. We had previously provided a $16.0 million senior mezzanine loan as part of our sale of the condominium unit in 2007. The May 2011 transaction included a consensual modification of that loan. In conjunction with the transaction, we successfully restructured the in-place mortgage financing, which had previously been in default.
In April 2011, we purchased SITQ Immobilier, a subsidiary of Caisse de depot et placement du Quebec, or SITQ's, 31.5% economic interest in 1515 Broadway, thereby consolidating full ownership of the 1,750,000 square foot (unaudited) building. The transaction valued the consolidated interests at $1.2 billion. This valuation was based on a negotiated sales agreement and took into consideration such factors as whether this was a distressed sale and whether a minority discount was warranted. We acquired the interest subject to the $458.8 million mortgage encumbering the property. We recognized a purchase price fair value adjustment of $475.1 million upon the closing of this transaction. This property, which we initially acquired in May 2002, was previously accounted for as an investment in unconsolidated joint ventures.
In January 2011, we purchased CIF's 49.9% interest in 521 Fifth Avenue, thereby assuming full ownership of the 460,000 square-foot (unaudited) building. The transaction valued the consolidated interests at approximately $245.7 million, excluding $4.5 million of cash and other assets acquired. We acquired the interest subject to the $140.0 million mortgage encumbering the property. We recognized a purchase price fair value adjustment of $13.8 million upon the closing of this transaction. In April 2011, we refinanced the property with a new $150.0 million two-year mortgage which carries a floating rate of interest of 200 basis points over the 30-day LIBOR. In connection with that refinancing, we acquired the fee interest in the property for $15.0 million.
The following summarizes our allocation of the purchase price of the assets acquired and liabilities assumed upon the closing of these 2011 acquisitions (in thousands):


	51 East			180				110 East				1515			521
	42nd			Maiden				42nd				Broadway			Fifth
	Street			Lane				Street							Avenue
Land	$	44,095		$	191,523			$	34,000			$	462,700		$	110,100

Building and building leasehold	33,470			233,230				46,411				707,938			146,686

Above market lease value	5,616			7,944				823				18,298			3,318

Acquired in-place leases	4,333			29,948				5,396				98,661			23,016

Other assets, net of other liabilities	—			—				—				27,127			—

Assets acquired	87,514			462,645				86,630				1,314,724			283,120

Fair value adjustment to mortgage note payable	—			—				—				(3,693		)	—

Below market lease value	7,514			20,320				2,326				84,417			25,977

Liabilities assumed	7,514			20,320				2,326				80,724			25,977

Purchase price allocation	$	80,000		$	442,325			$	84,304			$	1,234,000		$	257,143

Net consideration funded by us at closing, excluding consideration financed by debt	$	81,632		$	81,835			$	2,744			$	259,228		$	70,000

Equity and/or debt investment held	$	—		$	—			$	16,000			$	40,942		$	41,432

Debt assumed	$	—		$	—			$	65,000			$	458,767		$	140,000

Property_Dispositions

Property Dispositions	12 Months Ended
	Dec. 31, 2013
Discontinued Operations and Disposal Groups [Abstract]	'
Property Dispositions	'
	Property Dispositions
	In September 2013, we sold the property located at 300 Main Street, Stamford, Connecticut for $13.5 million. We recorded a $2.2 million impairment charge in the second quarter of 2013.
	In August 2013, we sold the property located at 333 West 34th, New York, New York for $220.3 million. We recognized a gain of $13.8 million on the sale, which is net of a $3.0 million employee compensation award accrued in connection with the realization of this investment gain as a bonus to certain employees that were instrumental in realizing the gain on sale.
	In February 2013, we, along with our joint venture partner, sold the retail property located at 44 West 55th Street, New York, New York for $6.3 million. We recognized a gain of $1.1 million on the sale.
	In February 2012, we sold the leased fee interest at 292 Madison Avenue, New York, New York for $85.0 million. We recognized a gain of $6.6 million on the sale, which is net of a $1.5 million employee compensation award accrued in connection with the realization of this investment gain as a bonus to certain employees that were instrumental in realizing the gain on this sale.
	In May 2011, we sold a 359,000 square foot (unaudited) property located at 28 West 44th Street, New York, New York for $161 million. We recognized a gain of $46.1 million on the sale.
	Discontinued operations included the results of operations of real estate assets sold prior to December 31, 2013. This included 300 Main Street, which was sold in September 2013, 333 West 34th Street, which was sold in August 2013, 44 West 55th Street, which was sold in February 2013, 292 Madison Avenue, which was sold in February 2012, and 28 West 44th Street, which was sold in May 2011.

	The following table summarizes net income from discontinued operations for the years ended December 31, 2013, 2012 and 2011, respectively (in thousands).


		Year Ended December 31,
		2013		2012		2011
	Revenues
	Rental revenue	$	10,656	$	18,651	$	27,093

	Escalation and reimbursement revenues	1,292		2,263		2,924

	Other income	8		8,190		121

	Total revenues	11,956		29,104		30,138

	Operating expenses	3,643		6,646		7,424

	Real estate taxes	765		1,224		2,334

	Interest expense, net of interest income	461		2,082		4,922

	Depreciable real estate reserves	2,150		—		—

	Transaction related costs	—		160		1

	Depreciation and amortization	3,212		6,373		6,715

	Amortization of deferred financing costs	—		—		182

	Total expenses	10,231		16,485		21,578

	Net income from discontinued operations	$	1,725	$	12,619	$	8,560

Debt_and_Preferred_Equity_Inve

Debt and Preferred Equity Investments	12 Months Ended
Debt and Preferred Equity Investments	Dec. 31, 2013
Investments, Debt and Equity Securities [Abstract]	'
Debt and Preferred Equity Investments	'
	Debt and Preferred Equity Investments
	During the years ended December 31, 2013 and 2012, our debt and preferred equity investments (net of discounts and deferred origination fees) increased approximately $601.3 million and $672.9 million, respectively, due to originations, purchases, accretion of reserves, discounts and paid-in-kind interest. We recorded repayments, participations and sales of approximately $644.9 million and $298.7 million, respectively, and loan loss reserves of zero and $3.0 million during the years ended December 31, 2013 and 2012, respectively, which offset the increases in debt and preferred equity investments.
	Debt Investments
	As of December 31, 2013 and 2012, we held the following debt investments with an aggregate weighted average current yield of approximately 11.47% at December 31, 2013 (in thousands):


	Loan Type		December 31, 2013				December 31, 2013				December 31, 2012				Initial
			Senior				Carrying Value,				Carrying Value,				Maturity
			Financing				Net of Discounts and Deferred Origination Fees				Net of Discounts and Deferred Origination Fees				Date
	Junior Participation		$	398,500			$	11,856			$	—			Mar-15
	Junior Participation		$	398,500			$	11,856			$	—			Mar-15
	Mezzanine Loan		205,000				68,319				66,307				Feb-16
	Mezzanine Loan		205,000				68,319				66,307				Feb-16
	Mortgage/Mezzanine Loan		166,710				44,742				44,013				May-16
	Mortgage/Mezzanine Loan		166,710				44,742				44,013				May-16
	Mezzanine Loan		177,000				15,012				15,906				May-16
	Mezzanine Loan		177,000				15,012				15,906				May-16
	Junior Participation		133,000				49,000				49,000				Jun-16
	Junior Participation		133,000				49,000				49,000				Jun-16
	Mezzanine Loan		165,000				71,312				70,967				Nov-16
	Mezzanine Loan		165,000				71,312				70,967				Nov-16
	Mortgage/Mezzanine Loan(1)		1,109,000				80,983				115,804				Mar-17
	Mortgage/Mezzanine Loan(1)		1,109,000				80,983				115,804				Mar-17
	Mezzanine Loan(2)		521,750				20,954				—				Jun-17
	Mezzanine Loan(2)		521,750				20,954				—				Jun-17
	Other Loan		15,000				3,500				3,500				Sep-21
	Other Loan		15,000				3,500				3,500				Sep-21
	Mezzanine Loan(3)		90,000				19,926				—				Nov-23
	Mezzanine Loan(3)		90,000				19,926				—				Nov-23
	Mortgage Loan(4)		—				—				218,068				—
	Mortgage Loan(4)		—				—				218,068				—
	Total fixed rate		$	2,980,960			$	385,604			$	583,565
	Total fixed rate		$	2,980,960			$	385,604			$	583,565
	Junior Participation(5)		$	80,932			$	24,046			$	—			Feb-14
	Junior Participation(5)		$	80,932			$	24,046			$	—			Feb-14
	Junior Participation(6)		57,750				10,873				10,869				Jun-14
	Junior Participation(6)		57,750				10,873				10,869				Jun-14
	Mortgage/Mezzanine Loan		330,000				131,724				131,231				Jul-14
	Mortgage/Mezzanine Loan		330,000				131,724				131,231				Jul-14
	Mezzanine Loan		180,000				59,892				59,739				Aug-14
	Mezzanine Loan		180,000				59,892				59,739				Aug-14
	Mezzanine Loan(7)		89,956				38,549				34,444				Oct-14
	Mezzanine Loan(7)		89,956				38,549				34,444				Oct-14
	Mortgage Loan		—				30,000				—				Dec-14
	Mortgage Loan		—				30,000				—				Dec-14
	Mezzanine Loan		110,000				49,110				—				Sep-15
	Mezzanine Loan		110,000				49,110				—				Sep-15
	Mezzanine Loan(8)		92,711				27,662				55,336				Dec-15
	Mezzanine Loan(8)		92,711				27,662				55,336				Dec-15
	Mezzanine Loan		775,000				72,823				—				Mar-16
	Mezzanine Loan		775,000				72,823				—				Mar-16
	Mezzanine Loan(9)		160,000				22,526				7,624				Jun-16
	Mezzanine Loan(9)		160,000				22,526				7,624				Jun-16
	Mezzanine Loan		87,300				25,590				34,761				Jul-16
	Mezzanine Loan		87,300				25,590				34,761				Jul-16
	Mezzanine Loan(10)		163,500				25,725				—				Nov-16
	Mezzanine Loan(10)		163,500				25,725				—				Nov-16
	Mezzanine Loan(11)		33,289				11,798				—				Dec-16
	Mezzanine Loan(11)		33,289				11,798				—				Dec-16
	Mortgage/Mezzanine Loan		55,000				20,553				—				Jul-18
	Mortgage/Mezzanine Loan		55,000				20,553				—				Jul-18
	Mortgage Loan		—				—				14,745				—
	Mortgage Loan		—				—				14,745				—
Mezzanine Loan		—				—				37,288				—
Mezzanine Loan		—				—				37,288				—
Mortgage/Mezzanine Loan		—				—				47,253				—
Mortgage/Mezzanine Loan		—				—				47,253				—
Total floating rate		$	2,215,438			$	550,871			$	433,290
Total floating rate		$	2,215,438			$	550,871			$	433,290
Total		5,196,398				936,475				1,016,855
Total		5,196,398				936,475				1,016,855
Loan loss reserve(12)						(1,000		)		(7,000		)
Loan loss reserve(12)						(1,000		)		(7,000		)
						$	935,475			$	1,009,855
						$	935,475			$	1,009,855
______________________________________________________________________

-1	Interest is added to the principal balance for this accrual only loan. In January 2013, we sold 50% of the mezzanine loan for $57.8 million and recognized additional income of $12.9 million, which is included in investment income on the consolidated statements of income.

-2	In October 2013, we entered into a loan participation agreement in the amount of $41.3 million on a $82.5 million mortgage. As a result of the transfer not meeting the conditions for sale accounting, the portion that was participated out has been recorded in other assets and other liabilities in the accompanying consolidated balance sheet. In addition, as of December 31, 2013, we were committed to fund an additional $20.0 million in connection with this loan.

-3	In November 2013, we entered into a loan participation agreement in the amount of $5.0 million on a $25.0 million mortgage. As a result of the transfer not meeting the conditions for sale accounting, the portion that was participated out has been recorded in other assets and other liabilities in the consolidated balance sheets.

-4	In November 2012, we acquired this nonperforming loan with an original balance of $219.0 million subject to interest based on default rate. In connection with the repayment of the loan in May 2013, we recognized additional income of $6.4 million, which is included in investment income on our consolidated statements of income.

-5	As of December 31, 2013, we were committed to fund an additional $0.9 million in connection with this loan.

-6	In December 2013, the loan was extended to June 2014.

-7	As of December 31, 2013, we were committed to fund an additional $11.2 million in connection with this loan.

-8	We funded $56.3 million at origination. In June 2013, we sold 50% of our interest in the $85.0 million mezzanine loan. Additionally, in December 2013 we closed on an $8.5 million future funding upsize, bringing our total additional committed funding amount to $22.1 million at December 31, 2013.

-9	As part of the refinancing of the related senior mortgage in June 2013, we originated a $30.0 million mezzanine loan and our previous investment in the amount of $15.0 million, including the $7.4 million participated interest, was repaid in full. Following the refinancing, we entered into a loan participation agreement in the amount of $7.4 million on a $30.0 million mortgage. Due to our continued involvement with the loan, the portion that was participated out has been recorded in other assets and other liabilities in the consolidated balance sheets.

-10	As of December 31, 2013, we were committed to fund an additional $11.4 million in connection with this loan.

-11	As of December 31, 2013, we were committed to fund an additional $0.3 million in connection with this loan.

-12	Loan loss reserves are specifically allocated to investments. Our reserves reflect management's judgment of the probability and severity of losses based on Level 3 data. We cannot be certain that our judgment will prove to be correct or that reserves will be adequate over time to protect against potential future losses.
Preferred Equity Investments
As of December 31, 2013 and 2012, we held the following preferred equity investments with an aggregate weighted average current yield of approximately 10.91% at December 31, 2013 (in thousands):


Type		December 31, 2013				December 31, 2013				December 31, 2012				Initial
		Senior				Carrying Value,				Carrying Value,				Mandatory
		Financing				Net of Discounts and Deferred Origination Fees				Net of Discounts and Deferred Origination Fees				Redemption
Preferred equity(1)		$	525,000			$	115,198			$	99,768			Jul-15
Preferred equity(1)		$	525,000			$	115,198			$	99,768			Jul-15
Preferred equity(1)(2)		55,747				25,896				18,925				Apr-16
Preferred equity(1)(2)		55,747				25,896				18,925				Apr-16
Preferred equity(1)		926,260				218,330				209,959				Jul-16
Preferred equity(1)		926,260				218,330				209,959				Jul-16
Preferred equity		70,000				9,940				9,927				Nov-17
Preferred equity		70,000				9,940				9,927				Nov-17
		$	1,577,007			$	369,364			$	338,579
		$	1,577,007			$	369,364			$	338,579
______________________________________________________________________

-1	The difference between the pay and accrual rates is included as an addition to the principal balance outstanding.

-2	As of December 31, 2013, the loan is fully funded.
The following table is a rollforward of our total loan loss reserves at December 31, 2013, 2012 and 2011 (in thousands):


	December 31,
	2013				2012				2011
Balance at beginning of year	$	7,000			$	50,175			$	61,361
Balance at beginning of year	$	7,000			$	50,175			$	61,361
Expensed	—				3,000				10,875
Expensed	—				3,000				10,875
Recoveries	—				(2,436		)		(4,370		)
Recoveries	—				(2,436		)		(4,370		)
Charge-offs and reclassifications	(6,000		)		(43,739		)		(17,691		)
Balance at end of period	$	1,000			$	7,000			$	50,175
Balance at end of period	$	1,000			$	7,000			$	50,175
At December 31, 2013, 2012 and 2011, all debt and preferred equity investments were performing in accordance with the terms of the loan agreements.
We have determined that we have one portfolio segment of financing receivables at December 31, 2013 and 2012 comprising commercial real estate which is primarily recorded in debt and preferred equity investments. Included in other assets is an additional amount of financing receivables totaling approximately $172.8 million and $121.3 million at December 31, 2013 and 2012, respectively. No financing receivables were 90 days past due at December 31, 2013.
The following table presents impaired loans, which may include non-accrual loans, as of December 31, 2013 and 2012, respectively (in thousands):


	31-Dec-13												31-Dec-12
	Unpaid				Recorded				Allowance				Unpaid			Recorded		Allowance
	Principal				Investment				Allocated				Principal			Investment		Allocated
	Balance												Balance
With no related allowance recorded:
Commercial real estate	$	—			$	—			$	—			$	—		$	—	$	—
Commercial real estate	$	—			$	—			$	—			$	—		$	—	$	—
With an allowance recorded:
Commercial real estate	10,750				10,750				1,000				10,750			10,750		7,000
Commercial real estate	10,750				10,750				1,000				10,750			10,750		7,000
Total	$	10,750			$	10,750			$	1,000			$	10,750		$	10,750	$	7,000
Total	$	10,750			$	10,750			$	1,000			$	10,750		$	10,750	$	7,000
The following table presents the average recorded investment in impaired loans, which may include non-accrual loans and the related investment and preferred equity income recognized during the years ended December 31, 2013 and 2012, respectively (in thousands):


	Year Ended
	December 31,
	2013				2012
Average recorded investment in impaired loans	$	10,881			$	50,231
Average recorded investment in impaired loans	$	10,881			$	50,231
Investment income recognized	7,117				3,712
Investment income recognized	7,117				3,712
On an ongoing basis, we monitor the credit quality of our financing receivables based on payment activity. We assess credit quality indicators based on the underlying collateral.

Investment_in_Unconsolidated_J

Investment in Unconsolidated Joint Ventures	12 Months Ended
	Dec. 31, 2013
Equity Method Investments and Joint Ventures [Abstract]	'
Investment in Unconsolidated Joint Ventures	'
	Investments in Unconsolidated Joint Ventures
	We have investments in several real estate joint ventures with various partners, including SITQ, Canada Pension Plan Investment Board, or CPPIB, Prudential Real Estate Investors, or Prudential, Onyx Equities, or Onyx, The Witkoff Group, or Witkoff, Credit Suisse Securities (USA) LLC, or Credit Suisse, Jeff Sutton, or Sutton, Harel Insurance and Finance, or Harel, Louis Cappelli, or Cappelli, The Moinian Group, or Moinian, Vornado Realty Trust (NYSE: VNO), or Vornado, Blackstone Real Estate Partners VII, or Blackstone, Plaza Global Real Estate Partners LP, or Plaza, Angelo Gordon Real Estate Inc., or AG, as well as private investors. All the investments below are voting interest entities, except for 388 and 390 Greenwich Street, 650 Fifth Avenue, 33 Beekman, 3 Columbus Circle and 180/182 Broadway which are VIEs in which we are not the primary beneficiary. Our net equity investment in these five VIEs was $310.7 million and $117.7 million at December 31, 2013 and 2012, respectively. As we do not control the joint ventures listed below, we account for them under the equity method of accounting.
	The table below provides general information on each of our joint ventures as of December 31, 2013 (amounts in thousands):


	Property	Partner	Ownership		Economic		Square			Acquisition Date		Acquisition
			Interest		Interest		Feet					Price(1)
	100 Park Avenue	Prudential	49.90%		49.90%		834			Jan-00		$	95,800

	21 West 34th Street	Sutton	50.00%		50.00%		30			Jul-05		22,400

	1604-1610 Broadway(2)	Onyx	70.00%		70.00%		30			Nov-05		4,400

	717 Fifth Avenue(3)	Sutton/Private Investor	10.92%		10.92%		120			Sep-06		251,900

	800 Third Avenue	Private Investors	42.95%		42.95%		526			Dec-06		285,000

	1745 Broadway	Witkoff/SITQ/Lehman Bros.	32.26%		32.26%		674			Apr-07		520,000

	1 and 2 Jericho Plaza	Onyx/Credit Suisse	20.26%		20.26%		640			Apr-07		210,000

	The Meadows	Onyx	50.00%		50.00%		582			Sep-07		111,500

	388 and 390 Greenwich Street(4)	SITQ	50.60%		50.60%		2,600			Dec-07		1,575,000

	180/182 Broadway(5)	Harel/Sutton	25.50%		25.50%		71			Feb-08		43,600

	600 Lexington Avenue	CPPIB	55.00%		55.00%		304			May-10		193,000

	11 West 34th Street(6)	Private Investor/Sutton	30.00%		30.00%		17			Dec-10		10,800

	7 Renaissance	Cappelli	50.00%		50.00%		37			Dec-10		4,000

	3 Columbus Circle(7)	Moinian	48.90%		48.90%		769			Jan-11		500,000

	280 Park Avenue(8)	Vornado	50.00%		49.50%		1,237			Mar-11		400,000

	1552-1560 Broadway(9)	Sutton	50.00%		50.00%		49			Aug-11		136,550

	747 Madison Avenue(10)	Harel/Sutton	33.33%		33.33%		10			Sep-11		66,250

	724 Fifth Avenue	Sutton	50.00%		50.00%		65			Jan-12		223,000

	10 East 53rd Street	CPPIB	55.00%		55.00%		390			Feb-12		252,500

	33 Beekman(11)	Harel/Naftali	45.90%		45.90%		145			Aug-12		31,000

	West Coast office portfolio(12)	Blackstone	42.02%		43.74%		4,474			Sep-12		880,103

	521 Fifth Avenue(13)	Plaza	50.50%		50.50%		460			Nov-12		315,000

	21 East 66th Street(14)	Private Investors	32.28%		32.28%		17			Dec-12		75,000

	315 West 36th Street	Private Investors	35.50%		35.50%		148			Dec-12		45,000

	Herald Center(15)	AG	40.00%		40.00%		365			Jan-13		50,000

	650 Fifth Avenue(16)	Sutton	50.00%		50.00%		32			Nov-13		—

	______________________________________________________________________

	-1	Acquisition price represents the actual or implied gross purchase price for the joint venture.

-2	In March 2013, Sutton conveyed his interest in this property to us. In January 2014, our ground lease position was terminated.

-3	In June 2012, this retail condominium was recapitalized. The recapitalization triggered a promote to our partner, which resulted in a reduction of our economic interest. In addition, we sold 50% of our remaining interest at a property valuation of $617.6 million. We recognized $67.9 million of additional cash income, equivalent to profit, due to the distribution of refinancing proceeds and a gain on sale of $3.0 million, which is net of a $1.0 million employee compensation award, accrued in connection with the realization of this investment gain as a bonus to certain employees that were instrumental in realizing the gain on this sale.

-4	The property is subject to a triple-net lease arrangement with a single tenant, which expires in 2020. In December 2013, the joint venture signed an agreement extending the lease through December 31, 2035. The agreement includes an option for the tenant to acquire the property for a specified price during the period from December 1, 2017 through December 31, 2020.

-5	In June 2013, the joint venture completed its redevelopment project. In July 2013, the lease for Pace University, or Pace, its primary tenant, commenced.

-6	The property is subject to a long-term net lease arrangement.

-7	As a result of the sale of a condominium interest in September 2012, Young & Rubicam, Inc., or Y&R, owns a portion of the property, generally floors three through eight referred to as Y&R units. Because the joint venture has an option to repurchase the Y&R units, no gain was recognized on this sale.

-8	In March 2011, we contributed our debt investment with a carrying value of $286.6 million to a newly formed joint venture in which we hold a 50% interest. We realized $38.7 million of additional income upon the contribution. This income is included in investment income in the consolidated statements of income. The joint venture paid us approximately $111.3 million and also assumed $30.0 million of related floating rate financing which matures in June 2016. In May 2011, this joint venture took control of the underlying property as part of a recapitalization transaction which valued the investment at approximately $1.1 billion.

-9	In connection with this acquisition, the joint venture also acquired a long-term leasehold interest in the retail space and certain other spaces at 1560 Broadway, which is adjacent to 1552 Broadway. The purchase price relates only to the purchase of the 1552 Broadway interest which comprises 13,045 square feet. In 2012, we, along with Sutton, acquired the property at 155 West 46th Street, which is adjacent to 1552 and 1560 Broadway, and sold it to the fee owner of 1560 Broadway.

-10	The joint venture owns 100% interest as tenant-in-common in 30 East 65th Street Corporation and the related proprietary lease of three cooperative apartment units in the building. In October 2013, the joint ventured acquired two additional cooperative apartment units in the building for $7.5 million.

-11	The joint venture acquired the fee interest in the property and will develop an approximately 30 story building for student housing. Upon completion of the development, the joint venture will convey a long-term ground lease condominium interest in the building to Pace.

-12	In September 2012, the Company, together with an affiliate of Blackstone, Gramercy and Square Mile Capital Management LLC, or Square Mile, formed a joint venture to recapitalize a 31-property, 4.5-million-square-foot West Coast office portfolio. The joint venture extended the $678.8 million mortgage secured by the portfolio for a term of 2 years with a 1-year extension option. In addition, the joint venture entered into a new $68.0 million mezzanine loan for a term of 2 years. Prior to the recapitalization in September 2012, the Company held $26.7 million in mezzanine and preferred equity positions in the entity that owned the portfolio. Following the recapitalization, Blackstone became the majority owner of the joint venture, with Equity Office Properties, a Blackstone affiliate, being responsible for the portfolio’s management and leasing. In February 2013, we acquired Gramercy’s 10.73% interest in the joint venture and simultaneously sold 20.78% of the newly acquired interest to Square Mile Capital Management LLC or Square Mile. During the year ended December 31, 2013, we acquired Square Mile’s 6.00% interest in the joint venture and the joint venture sold three of the properties for an aggregate of $224.3 million, on which we recognized a gain of approximately $2.1 million. The proceeds from the sale of these properties were used primarily to repay $194.5 million of the mortgage and $20.5 million of the mezzanine loan.

-13	In November 2012, we sold our 49.5% partnership interest in 521 Fifth Avenue to Plaza Global Real Estate Partners for a gross valuation price of $315.0 million for this property. We recognized a gain of $19.4 million on the sale which is net of a $1.0 million employee compensation award, accrued in connection with the realization of this investment gain as a bonus to certain employees that were instrumental in realizing the gain on this sale. We also refinanced the existing $150.0 million loan with a $170.0 million 7-year mortgage loan which bears interest at 220 basis points over LIBOR. Following the sale, we deconsolidated the entity effective November 30, 2012 and have accounted our investment under the equity method because of lack of control. During the year ended December 31, 2013, we recognized additional post closing costs of $2.8 million as an adjustment to the gain.

-14	We hold a 32.28% interest in 3 retail and 2 residential units at the property and a 16.14% in 4 residential units at the property.

-15	The joint venture owned a preferred equity interest in an entity that holds the interest in a mixed commercial use property located in Manhattan. The preferred equity bore interest at a rate of 8.75% per annum through its redemption date in December 2013.

-16	The joint venture owns a long-term leasehold interest in the retail space at 650 Fifth Avenue. In connection with the ground lease obligation, SLG provided a performance guaranty and Sutton executed a contribution agreement to reflect its pro rata obligation. In an event the property is converted into a condominium unit and the landlord elects the purchase option, the joint venture shall be obligated to acquire the unit at the then fair value. In November 2013, the joint venture signed an agreement to buy out the lease of retailer Juicy Couture for $51.0 million as part of its plan to redevelop and reposition the property. Under this agreement, the tenant shall terminate the lease no later than April 2014.

In December 2013, we sold our 50.0% partnership interest in the joint venture which holds 27-29 West 34th Street to Sutton at an implied gross valuation of $70.1 million, inclusive of the $52.8 million mortgage encumbering the property. We recognized a gain of $7.6 million on the sale of our investment which is net of a $1.5 million employee compensation award, accrued in connection with the realization of this investment gain as a bonus to certain employees that were instrumental in realizing the gain on this sale. Simultaneously, we, along with Sutton, also formed a new joint venture and retained the air rights at this property.
In July 2012, we, along with our joint venture partner, sold One Court Square for $481.1 million, which included the assumption by the purchaser of $315.0 million of existing debt. We recognized a gain of $1.0 million on the sale of this property.
In April 2012, we, along with our joint venture partner, Jeff Sutton, sold the property located at 379 Broadway for $48.5 million, inclusive of the fee position which was acquired for $13.5 million. We recognized a gain of $6.5 million on the sale of this property.
In March 2012, we, along with our joint venture partner, Jeff Sutton, sold the property located at 141 Fifth Avenue for $46.0 million. We recognized a gain of $7.3 million on sale of this investment which is net of a $1.5 million employee compensation award, accrued in connection with the realization of this investment gain as a bonus to certain employees that were instrumental in realizing the gain on this sale.
In November 2011, we acquired the remaining 50% interest in the joint venture which held an investment in a debt position on the property located at 450 West 33rd Street. As we own 100% of this investment, we have reclassified it and recorded it as a debt investment. See Note 5, "Debt and Preferred Equity Investments."
In August 2011, we sold our 10% interest in the joint venture that held 1551-1555 Broadway for approximately $9.7 million. We recognized a gain of $4.0 million on the sale.
We generally finance our joint ventures with non-recourse debt. However, in certain cases we have provided guarantees or master leases for tenant space. These guarantees and master leases terminate upon the satisfaction of specified circumstances or repayment of the underlying loans. The first mortgage notes and other loans payable collateralized by the respective joint venture properties and assignment of leases at December 31, 2013 and 2012, respectively, are as follows (amounts in thousands):


Property		Maturity Date		Interest			31-Dec-13				31-Dec-12
				Rate(1)
100 Park Avenue		Sep-14		6.64	%		$	209,786			$	212,287

7 Renaissance		Dec-15		10	%		1,276				856

11 West 34th Street		Jan-16		4.82	%		17,205				17,491

280 Park Avenue		Jun-16		6.57	%		706,886				710,000

21 West 34th Street		Dec-16		5.76	%		100,000				100,000

1745 Broadway		Jan-17		5.68	%		340,000				340,000

1 and 2 Jericho Plaza		May-17		5.65	%		163,750				163,750

800 Third Avenue		Aug-17		6	%		20,910				20,910

388 and 390 Greenwich Street(2)		Dec-17		3.2	%		996,082				996,082

315 West 36th Street		Dec-17		3.16	%		25,000				25,000

717 Fifth Avenue(3)		Jul-22		4.45	%		300,000				300,000

21 East 66th Street(4)		Apr-23		4.1	%		12,000				12,000

717 Fifth Avenue(3)		Jul-24		9	%		304,000				294,509

1604-1610 Broadway(5)		—		5.66	%		27,000				27,000

Total fixed rate debt							$	3,223,895			$	3,219,885

West Coast office portfolio(6)		Sep-14		3.93	%		526,290				745,025

747 Madison Avenue		Oct-14		2.97	%		33,125				33,125

180/182 Broadway(7)		Dec-14		2.94	%		89,893				71,524

The Meadows(8)		Sep-15		7.75	%		67,350				57,000

3 Columbus Circle(9)		Apr-16		2.38	%		239,233				247,253

1552 Broadway(10)		Apr-16		3.48	%		158,690				113,869

Other loan payable		Jun-16		1.09	%		30,000				30,000

724 Fifth Avenue		Jan-17		2.54	%		120,000				120,000

10 East 53rd Street		Feb-17		2.69	%		125,000				125,000

33 Beekman(11)		Aug-17		2.94	%		18,362				18,362

600 Lexington Avenue		Oct-17		2.28	%		120,616				124,384

388 and 390 Greenwich Street(2)		Dec-17		1.34	%		142,297				142,297

521 Fifth Avenue		Nov-19		2.39	%		170,000				170,000

21 East 66th Street		Jun-33		2.88	%		1,959				2,033

27-29 West 34th Street(12)							—				53,375

16 Court Street(13)							—				84,916

Total floating rate debt							$	1,842,815			$	2,138,163

Total joint venture mortgages and other loans payable							$	5,066,710			$	5,358,048

_________________________________

-1	Effective weighted average interest rate for the year ended December 31, 2013, taking into account interest rate hedges in effect during the period.

-2	These loans are comprised of a $576.0 million mortgage and a $562.4 million mezzanine loan, both of which are fixed rate loans, except for $72.0 million of the mortgage and $70.3 million of the mezzanine loan which are floating. Up to $200.0 million of the mezzanine loan, secured indirectly by these properties, is recourse to us. We believe it is unlikely that we will be required to perform under this guarantee.

-3	In June 2012, the joint venture replaced the $245.0 million floating rate mortgage loan, which bore interest at 275 basis points over LIBOR and was due to mature in September 2012, with a $300.0 million fixed rate mortgage loan and $290.0 million mezzanine loan which is subject to accretion based on the difference between contractual interest rate and contractual pay rate.

-4	In April 2013, the loan was refinanced at par and its maturity was extended to April 2023.

-5	This loan went into default in November 2009 due to the non-payment of debt service.

-6	As a result of the sale of three of its properties, the joint venture paid down $194.5 million of its mortgage and $20.5 million of its mezzanine loan.

-7	This loan has a committed amount of $90.0 million. In November 2013, this loan was extended by one-year, subject to principal amortization through the maturity date.

-8	As a result of the refinancing and restructuring in August 2012, we replaced the previous mortgage with a $60.0 million, three-year mortgage, of which $3.0 million was unfunded as of December 31, 2012, and recognized additional income of $10.8 million due to the repayment of the previous mortgage at a discount. In December 2013, the joint venture upsized the original mortgage with a maximum amount of $60.0 million to $67.4 million. All other terms of the loan remained the same.

-9	This loan has a committed amount of $260.0 million. The joint venture has the ability to increase the mortgage by $40.0 million based on meeting certain performance hurdles. In connection with this obligation, we executed a master lease agreement and our joint venture partner executed a contribution agreement to reflect its pro rata obligation under the master lease. The lien on the mortgage and the master lease excludes the condominium interest owned by Y&R. See Note 7 of prior table.

-10	In April 2013, we refinanced the previous $119.6 million mortgage with a $200.0 million three-year loan construction financing facility comprised of a $170.0 million mortgage loan and a $30.0 million mezzanine loan. The facility has two one-year extension options. As of December 31, 2013, $37.6 million of the mortgage loan and $3.7 million of the mezzanine loan remained unfunded.

-11	This loan has a committed amount of $75.0 million, which is recourse to us. Our partner has indemnified us for its pro rata share of the recourse guarantee. A portion of the guarantee terminates upon the joint venture reaching certain milestones. We believe it is unlikely that we will be required to perform under this guarantee.

-12	In May 2013, this loan was refinanced and its maturity was extended to May 2018. In December 2013, we sold our interest in the joint venture, inclusive of our share in the joint venture debt.

-13	In April 2013, we acquired interests from our joint venture partner, CIF, and have consolidated the entity due to our controlling interest.
We act as the operating partner and day-to-day manager for all our joint ventures, except for 800 Third Avenue, 1 and 2 Jericho Plaza, 280 Park Avenue, 3 Columbus Circle, West Coast portfolio and The Meadows. We are entitled to receive fees for providing management, leasing, construction supervision and asset management services to our joint ventures. We earned approximately $4.7 million, $7.9 million and $8.6 million from these services for the years ended December 31, 2013, 2012 and 2011, respectively. In addition, we have the ability to earn incentive fees based on the ultimate financial performance of certain of the joint venture properties.
The combined balance sheets for the unconsolidated joint ventures, at December 31, 2013 and 2012, are as follows (in thousands):


	December 31,
	2013			2012
Assets
Commercial real estate property, net	$	6,846,021		$	6,910,991

Other assets	827,282			728,113

Total assets	$	7,673,303		$	7,639,104

Liabilities and members' equity
Mortgages and other loans payable	$	5,066,710		$	5,358,048

Other liabilities	596,960			406,929

Members' equity	2,009,633			1,874,127

Total liabilities and members' equity	$	7,673,303		$	7,639,104

Company's investments in unconsolidated joint ventures	$	1,113,218		$	1,032,243

The combined statements of income for the unconsolidated joint ventures, from acquisition date through the years ended December 31, 2013, 2012 and 2011 are as follows (in thousands):


	Years Ended December 31,
	2013			2012				2011
Total revenues	$	628,649		$	511,157			$	480,935

Operating expenses	114,633			80,722				71,830

Ground rent	2,863			2,975				3,683

Real estate taxes	71,755			53,613				51,511

Interest expense, net of interest income	225,765			221,476				210,489

Amortization of deferred financing costs	17,092			9,739				12,911

Transaction related costs	808			2,044				2,665

Depreciation and amortization	192,504			166,336				137,070

Total expenses	625,420			536,905				490,159

Gain on early extinguishment of debt	—			21,421				—

Net income (loss) before gain on sale	$	3,229		$	(4,327	)		$	(9,224	)

Company's equity in net income from unconsolidated joint ventures	$	9,921		$	76,418			$	1,583

Equity in net income from unconsolidated joint ventures for the year ended December 31, 2012 includes $67.9 million of additional income recognized in June 2012 as a result of the distribution of the recapitalization of 717 Fifth Avenue and $10.8 million of additional income recognized in August 2012 as a result of the repayment of the Meadows' previous mortgage at a discount, as further discussed in the prior tables.

Deferred_Costs

Deferred Costs	12 Months Ended
	Dec. 31, 2013
Deferred Costs [Abstract]	'
Deferred Costs	'
	Deferred Costs
	Deferred costs at December 31, 2013 and 2012 consisted of the following (in thousands):


		December 31,
		2013			2012
	Deferred leasing	$	326,379		$	285,931

	Deferred financing	157,088			152,596

		483,467			438,527

	Less accumulated amortization	(216,409		)	(177,382		)
	Deferred costs, net	$	267,058		$	261,145

Mortgages_and_Other_Loans_Paya

Mortgages and Other Loans Payable	12 Months Ended
	Dec. 31, 2013
Mortgages and Other Loans Payable	'
Mortgages and Other Loans Payable	'
	Mortgages and Other Loans Payable
	The first mortgages and other loans payable collateralized by the respective properties and assignment of leases at December 31, 2013 and 2012, respectively, were as follows (amounts in thousands):


	Property	Maturity	Interest			31-Dec-13			31-Dec-12
		Date	Rate(1)
	609 Partners, LLC(2)	Jul-14	5	%		$	23		$	23

	125 Park Avenue	Oct-14	5.75	%		146,250			146,250

	711 Third Avenue	Jun-15	4.99	%		120,000			120,000

	625 Madison Avenue	Nov-15	7.27	%		120,830			125,603

	500 West Putnam	Jan-16	5.52	%		23,529			24,060

	420 Lexington Avenue	Sep-16	7.15	%		182,641			184,992

	Landmark Square	Dec-16	4	%		82,909			84,486

	485 Lexington Avenue	Feb-17	5.61	%		450,000			450,000

	120 West 45th Street	Feb-17	6.12	%		170,000			170,000

	762 Madison Avenue	Feb-17	3.75	%		8,211			8,371

	2 Herald Square	Apr-17	5.36	%		191,250			191,250

	885 Third Avenue	Jul-17	6.26	%		267,650			267,650

	Other loan payable(3)	Sep-19	8	%		50,000			50,000

	One Madison Avenue	May-20	5.91	%		587,336			607,678

	100 Church	Jul-22	4.68	%		230,000			230,000

	919 Third Avenue(4)	Jun-23	5.12	%		500,000			500,000

	400 East 57th Street	Feb-24	4.13	%		70,000			70,000

	400 East 58th Street	Feb-24	4.13	%		30,000			30,000

	1515 Broadway(5)	Mar-25	3.93	%		900,000			—

	300 Main Street(6)	—	—			—			11,500

	220 East 42nd Street(7)	—	—			—			185,906

	Total fixed rate debt					$	4,130,629		$	3,457,769

	Master repurchase(8)	Dec-14	3.28	%		91,000			116,667

	16 Court Street(9)	Apr-16	3.22	%		79,243			—

	180 Maiden Lane(10)	Nov-16	2.39	%		262,706			271,215

	248-252 Bedford Avenue	Mar-18	2.44	%		22,000			—

	220 East 42nd Street(7)	Oct-20	4.05	%		275,000			—

	1515 Broadway(5)	—	—			—			769,813

	Total floating rate debt					$	729,949		$	1,157,695

Total mortgages and other loans payable					$	4,860,578		$	4,615,464

_________________________________

-1	Effective weighted average interest rate for the year ended December 31, 2013, taking into account interest rate hedges in effect during the period.

-2	As part of an acquisition, the Operating Partnership issued 63.9 million units of its 5.0% Series E preferred units, or the Series E units, with a liquidation preference of $1.00 per unit. As of December 31, 2013, 22,658 Series E units remaining outstanding.

-3	This loan is secured by a portion of a preferred equity investment.

-4	We own a 51.0% controlling interest in the joint venture that is the borrower on this loan. This loan is non-recourse to us.

-5	In April 2012, we refinanced the previous $447.2 million mortgage with a $775.0 million seven-year mortgage. In February 2013, we refinanced the previous $775.0 million mortgage with a new $900.0 million 12-year mortgage and realized a net loss on early extinguishment of debt of approximately $18.5 million, including a prepayment penalty of $7.6 million.

-6	The property was sold in September 2013.

-7	In October 2013, we closed on a $275.0 million seven-year mortgage. This new mortgage replaced the $185.9 million previous mortgage that was repaid in August 2013.

-8	In December 2013, we entered into a new Master Repurchase Agreement, or MRA, with a maximum facility capacity of $300.0 million, under which we agreed to sell certain debt investments in exchange for cash with a simultaneous agreement to repurchase the same debt investments at a certain date or on demand. This new MRA, which bears interest ranging from 250 and 325 basis points over one-month LIBOR depending on the pledged collateral, replaced the previous $175.0 million MRA facility, which bore interest based on one-month LIBOR plus 300 basis points basis points through September 2013 and 350 basis points through November 2013.

-9	In April 2013, we acquired interests from our joint venture partner, CIF, and have consolidated the entity due to our controlling interest. In December 2013, we repaid $5.0 million of the principal balance and modified and extended the terms of the existing mortgage. The modified mortgage bears interest based on one-month LIBOR plus 350 basis points with a floor of 50 basis points.

-10	In connection with this consolidated joint venture obligation, we executed a master lease agreement. Our partner has executed a contribution agreement to reflect its pro rata share of the obligation under the master lease.

At December 31, 2013 and 2012, the gross book value of the properties and debt and preferred equity investments collateralizing the mortgages and other loans payable was approximately $8.0 billion and $7.6 billion, respectively.

Corporate_Indebtedness

Corporate Indebtedness	12 Months Ended
	Dec. 31, 2013
Debt Disclosure [Abstract]	'
Corporate Indebtedness	'
	Corporate Indebtedness
	2012 Credit Facility
	In November 2012, we entered into a $1.6 billion credit facility, or the 2012 credit facility, which refinanced, extended and upsized the previous 2011 revolving credit facility. The 2012 credit facility consists of a $1.2 billion revolving credit facility, or the revolving credit facility, and a $400.0 million term loan, or the term loan facility. The revolving credit facility matures in March 2017 and includes two six-month extension options, subject to certain conditions and the payment of an extension fee of 10 basis points for each such extension. We also have an option, subject to customary conditions, without the consent of existing lenders, to increase the capacity under the revolving credit facility to $1.5 billion at any time prior to the maturity date for the revolving credit facility, by obtaining additional commitments from our existing lenders and other financial institutions. The term loan facility matures on March 30, 2018.
	The 2012 credit facility bears interest at a spread over LIBOR ranging from (i) 100 basis points to 175 basis points for loans under the revolving credit facility and (ii) 115 basis points to 200 basis points for loans under the term loan facility, in each case based on the credit rating assigned to the senior unsecured long term indebtedness of ROP. At December 31, 2013, the applicable spread was 145 basis points for revolving credit facility and 165 basis points for the term loan facility. At December 31, 2013, the effective interest rate was 1.62% for the revolving credit facility and 2.00% for the term loan facility. We are required to pay quarterly in arrears a 15 to 35 basis point facility fee on the total commitments under the revolving credit facility based on the credit rating assigned to the senior unsecured long term indebtedness of ROP. As of December 31, 2013, the facility fee was 30 basis points. At December 31, 2013, we had approximately $74.6 million of outstanding letters of credit, $220.0 million drawn under the revolving credit facility and $400.0 million outstanding under the term loan facility, with total undrawn capacity of approximately $0.9 billion under the 2012 credit facility.
	The Company, ROP and the Operating Partnership are all borrowers jointly and severally obligated under the 2012 credit facility. No other subsidiary of ours is an obligor under the 2012 credit facility.
	The 2012 credit facility includes certain restrictions and covenants (see Restrictive Covenants below).
	2011 Revolving Credit Facility
	The 2012 credit facility replaced our $1.5 billion revolving credit facility, or the 2011 revolving credit facility, which was terminated concurrently with the entering into the 2012 credit facility. The 2011 revolving credit facility bore interest at a spread over LIBOR ranging from 100 basis points to 185 basis points, based on the credit rating assigned to the senior unsecured long-term indebtedness of ROP, and required to pay quarterly in arrears a 17.5 to 45 basis point facility fee on the total commitments under the 2011 revolving credit facility. The 2011 revolving credit facility included certain restrictions and covenants and, as of the time of the termination of the 2011 revolving credit facility and as of November 2012, we were in compliance with all such restrictions and covenants.
	2007 Revolving Credit Facility
	The 2011 revolving credit facility replaced our $1.5 billion revolving credit facility, or the 2007 revolving credit facility, which was terminated concurrently with the entering into the 2011 revolving credit facility. The 2007 revolving credit facility bore interest at a spread over the 30-day LIBOR ranging from 70 basis points to 110 basis points, based on our leverage ratio, and required a 12.5 to 20 basis point fee, also based on our leverage ratio, on the unused balance payable annually in arrears. The 2007 revolving credit facility included certain restrictions and covenants and, as of the time of the termination of the 2007 revolving credit facility and as of October 31, 2011, we were in compliance with all such restrictions and covenants.
	Senior Unsecured Notes
	The following table sets forth our senior unsecured notes and other related disclosures as of December 31, 2013 and 2012, respectively by scheduled maturity date (amounts in thousands):


	Issuance		December 31,				December 31,				31-Dec-12				Coupon			Effective			Term		Maturity Date
			2013				2013				Accreted				Rate(1)			Rate			(in Years)
			Unpaid				Accreted				Balance
			Principal				Balance
			Balance
	August 13, 2004(2)(3)		$	75,898			$	75,898			$	75,898			5.88	%		5.88	%		10		August 15, 2014

	March 31, 2006(2)(3)		255,308				255,206				255,165				6	%		6	%		10		March 31, 2016

	October 12, 2010(4)		345,000				297,837				287,373				3	%		3	%		7		October 15, 2017

	August 5, 2011(5)		250,000				249,681				249,620				5	%		5	%		7		August 15, 2018

	March 16, 2010(5)		250,000				250,000				250,000				7.75	%		7.75	%		10		March 15, 2020

	November 15, 2012(5)		200,000				200,000				200,000				4.5	%		4.5	%		10		December 1, 2022

	June 27, 2005(2)(6)		7				7				7				4	%		4	%		20		June 15, 2025

	March 26, 2007(7)		10,701				10,701				16,893				3	%		3	%		20		March 30, 2027

			$	1,386,914			$	1,339,330			$	1,334,956

	_________________________________

	-1	Interest on the senior unsecured notes is payable semi-annually with principal and unpaid interest due on the scheduled maturity dates.

	-2	Issued by ROP.

	-3	On December 27, 2012, we repurchased $42.4 million of aggregate principal amount of these notes, consisting of $22.7 million of the 5.875% Notes and $19.7 million of the 6.0% Notes, for a total consideration of $46.4 million and realized a net loss on early extinguishment of debt of approximately $3.8 million.

	-4	In October 2010, the Operating Partnership issued $345.0 million of these exchangeable notes. Interest on these notes is payable semi-annually on April 15 and October 15. The notes had an initial exchange rate representing an exchange price that was set at a 30.0% premium to the last reported sale price of SL Green's common stock on October 6, 2010, or $85.81. The initial exchange rate is subject to adjustment under certain circumstances. The current exchange rate is 11.7153 shares of SL Green's common stock per $1,000 principal amount of these notes. The notes are senior unsecured obligations of the Operating Partnership and are exchangeable upon the occurrence of specified events and during the period beginning on the twenty-second scheduled trading day prior to the maturity date and ending on the second business day prior to the maturity date, into cash or a combination of cash and shares of SL Green's common stock, if any, at our option. The notes are guaranteed by ROP. On the issuance date, $78.3 million of the debt balance was recorded in equity. As of December 31, 2013, approximately $47.2 million remained to be amortized into the debt balance.

	-5	Issued by the Company, the Operating Partnership and ROP, as co-obligors.

	-6	Exchangeable senior debentures which are currently callable at par. In addition, the debentures can be put to ROP, at the option of the holder at par plus accrued and unpaid interest, on June 15, 2015 and 2020 and upon the occurrence of certain change of control transactions. As a result of the acquisition of all outstanding shares of common stock of Reckson, or the Reckson Merger, the adjusted exchange rate for the debentures is 7.7461 shares of SL Green's common stock per $1,000 of principal amount of debentures and the adjusted reference dividend for the debentures is $1.3491. During the year ended December 31, 2012, we repurchased $650,000 of these bonds at par.

	-7	In March 2007, the Operating Partnership issued $750.0 million of these exchangeable notes. Interest on these notes is payable semi-annually on March 30 and September 30. The notes have an initial exchange rate representing an exchange price that was set at a 25.0% premium to the last reported sale price of the Company's common stock on March 20, 2007, or $173.30. The initial exchange rate is subject to adjustment under certain circumstances. The notes are senior unsecured obligations of the Operating Partnership and are exchangeable upon the occurrence of specified events and during the period beginning on the twenty-second scheduled trading day prior to the maturity date and ending on the second business day prior to the maturity date, into cash or a combination of cash and shares of SL Green's common stock, if any, at our option. The notes are currently redeemable at the Operating Partnership’s option. The Operating Partnership may be required to repurchase the notes on March 30, 2017 and 2022, and upon the occurrence of certain designated events. On March 30, 2012, we repurchased $102.2 million of aggregate principal amount of the exchangeable notes pursuant to a mandatory offer to repurchase the notes. On the issuance date, $66.6 million was recorded in equity and was fully amortized into the debt balance as of March 31, 2012. During the year ended December 31, 2013, we repurchased $6.2 million of aggregate principal amount of exchangeable notes at approximately at par.

	Restrictive Covenants
	The terms of the 2012 credit facility and certain of our senior unsecured notes include certain restrictions and covenants which may limit, among other things, our ability to pay dividends, make certain types of investments, incur additional indebtedness, incur liens and enter into negative pledge agreements and dispose of assets, and which require compliance with financial ratios relating to the minimum amount of tangible net worth, a maximum ratio of total indebtedness to total asset value, a minimum ratio of EBITDA to fixed charges, a maximum ratio of secured indebtedness to total asset value and a maximum ratio of unsecured indebtedness to unencumbered asset value. The dividend restriction referred to above provides that, we will not during any time when a default is continuing, make distributions with respect to common stock or other equity interests, except to enable the Company to continue to qualify as a REIT for Federal income tax purposes. As of December 31, 2013 and 2012, we were in compliance with all such covenants.
	Junior Subordinate Deferrable Interest Debentures
	In June 2005, the Company and the Operating Partnership issued $100.0 million in unsecured trust preferred securities through a newly formed trust, SL Green Capital Trust I, or the Trust, which is a wholly-owned subsidiary of the Operating Partnership. The securities mature in 2035 and bear interest at a fixed rate of 5.61% for the first ten years ending July 2015. Thereafter, the interest rate will float at three-month LIBOR plus 1.25%. Interest payments may be deferred for a period of up to eight consecutive quarters if the Operating Partnership exercises its right to defer such payments. The Trust preferred securities are redeemable at the option of the Operating Partnership, in whole or in part, with no prepayment premium. We do not consolidate the Trust even though it is a variable interest entity as we are not the primary beneficiary. Because the Trust is not consolidated, we have recorded the debt on our consolidated balance sheets and the related payments are classified as interest expense.
	Principal Maturities
	Combined aggregate principal maturities of mortgages and other loans payable, 2012 revolving credit facility, trust preferred securities, senior unsecured notes and our share of joint venture debt as of December 31, 2013, including as-of-right extension options, were as follows (in thousands):


		Scheduled				Principal				Revolving				Trust				Tern Loan and Senior				Total				Joint
		Amortization				Repayments				Credit				Preferred				Unsecured								Venture
						Facility				Securities				Notes				Debt
2014		$	43,976				$	237,273			$	—			$	—			$	75,898			$	357,147			$	398,312

2015	47,312				229,537				—				—				7				276,856				45,332

2016	55,938				594,017				—				—				255,308				905,263				604,510

2017	61,213				1,086,579				220,000				—				355,701				1,723,493				930,338

2018	64,205				21,363				—				—				650,000				735,568				28

Thereafter	247,407				2,171,758				—				100,000				450,000				2,969,165				173,944

	$	520,051			$	4,340,527			$	220,000			$	100,000			$	1,786,914			$	6,967,492			$	2,152,464

Consolidated interest expense, excluding capitalized interest, was comprised of the following (in thousands):


	Years Ended December 31,
	2013				2012				2011
Interest expense	$	332,276			$	331,516			$	287,252

Interest income	(2,061		)		(1,619		)		(2,004		)
Interest expense, net	$	330,215			$	329,897			$	285,248

Interest capitalized	$	11,475			$	12,218			$	5,123

Related_Party_Transactions

Related Party Transactions	12 Months Ended
	Dec. 31, 2013
Related Party Transactions [Abstract]	'
Related Party Transactions	'
	Related Party Transactions
	Cleaning/ Security/ Messenger and Restoration Services
	Through Alliance Building Services, or Alliance, First Quality Maintenance, L.P., or First Quality, provides cleaning, extermination and related services, Classic Security LLC provides security services, Bright Star Couriers LLC provides messenger services, and Onyx Restoration Works provides restoration services with respect to certain properties owned by us. Alliance is partially owned by Gary Green, a son of Stephen L. Green, the chairman of SL Green's board of directors. In addition, First Quality has the non-exclusive opportunity to provide cleaning and related services to individual tenants at our properties on a basis separately negotiated with any tenant seeking such additional services. The Service Corporation has entered into an arrangement with Alliance whereby it will receive a profit participation above a certain threshold for services provided by Alliance to certain tenants at certain buildings above the base services specified in their lease agreements. Income earned from profit participation, which is included in other income on the consolidated statements of income, was approximately $3.5 million, $4.0 million and $2.7 million for the years ended December 31, 2013, 2012 and 2011, respectively. We also recorded expenses of approximately $19.5 million, $17.9 million and $16.1 million for the years ended December 31, 2013, 2012 and 2011 respectively, for these services (excluding services provided directly to tenants).
	Marketing Services
	A-List Marketing, LLC, or A-List, provides marketing services to us. Ms. Deena Wolff, a sister of Mr. Marc Holliday, our CEO, is the owner of A-List. We recorded approximately $293,636, $155,500 and $140,300 for the years ended December 31, 2013, 2012 and 2011 respectively, for these services.
	Leases
	Nancy Peck and Company leases 1,003 square feet (unaudited) of space at 420 Lexington Avenue under a lease that ends in August 2015. Nancy Peck and Company is owned by Nancy Peck, the wife of Stephen L. Green. The rent due pursuant to the lease was $35,516 per annum for year one increasing to $40,000 in year seven.
	Management Fees
	S.L. Green Management Corp., a consolidated entity, receives property management fees from an entity in which Stephen L. Green owns an interest. We received management fees from such entity of approximately $441,093, $384,900 and $420,300 for the years ended December 31, 2013, 2012 and 2011, respectively.
	Other
	Amounts due from/to related parties at December 31, 2013 and 2012 consisted of the following (in thousands):


		December 31,
		2013		2012
	Due from joint ventures	$	2,376	$	511

	Other	6,154		7,020

	Related party receivables	$	8,530	$	7,531


	Due to a joint venture (included in Accounts payable and accrued expenses)	$	—	$	(8,401	)

Noncontrolling_Interests_in_Op

Noncontrolling Interests in Operating Partnership	12 Months Ended
	Dec. 31, 2013
Noncontrolling Interest [Abstract]	'
Noncontrolling Interests on the Company's Consolidated Financial Statements	'
	Noncontrolling Interests on the Company's Consolidated Financial Statements
	Noncontrolling interests represent the common and preferred units of limited partnership interest in the Operating Partnership not held by the Company as well as third party equity interests in our other consolidated subsidiaries. Noncontrolling interests in the Operating Partnership are shown in the mezzanine equity while the noncontrolling interests in our other consolidated subsidiaries are shown in the equity section of the Company’s consolidated financial statements.
	Common Units of Limited Partnership Interest in the Operating Partnership
	As of December 31, 2013 and 2012, the noncontrolling interest unit holders owned 2.96% (2,902,317 units) and 2.94% (2,759,758 units) of the Operating Partnership, respectively. At December 31, 2013, 2,902,317 shares of SL Green's common stock were reserved for issuance upon redemption of units of limited partnership interest of the Operating Partnership.
	Noncontrolling interests in the Operating Partnership is recorded at the greater of its cost basis or fair market value based on the closing stock price of SL Green's common stock at the end of the reporting period.
	Below is the rollforward analysis of the activity relating to the noncontrolling interests in the Operating Partnership (in thousands) as of December 31, 2013, and 2012:


		2013			2012
	Balance at beginning of period	$	212,907		$	195,030

	Distributions	(4,146		)	(3,296		)
	Issuance of common units	24,750			42,239

	Redemption of common units	(17,287		)	(87,513		)
	Net income	3,023			5,597

	Accumulated other comprehensive income (loss) allocation	611			(388		)

	Fair value adjustment	45,618			61,238

	Balance at end of period	$	265,476		$	212,907

	Preferred Units of Limited Partnership Interest in the Operating Partnership
	The Operating Partnership has 1,902,000 4.5% Series G Preferred Units of limited partnership interest, or the Series G Preferred Units, with a liquidation preference of $25.00 per unit, which was issued in January 2012 as part of an acquisition. The Series G Preferred unitholders receive annual dividends of $1.125 per unit paid on a quarterly basis and dividends are cumulative, subject to certain provisions. The Series G Preferred Units are convertible into a number of common units of limited partnership interest in the Operating Partnership equal to (i) the liquidation preference plus accumulated and unpaid distributions on the conversion date divided by (ii) $88.50. The common units of limited partnership interest in the Operating Partnership may be redeemed in exchange for SL Green's common stock on a 1-to-1 basis. The Series G Preferred Units also provide the holder with the right to require the Operating Partnership to repurchase the Series G Preferred Units for cash before January 31, 2022.
	The Operating Partnership has 80,000 6.0% Series H Preferred Units of limited partnership interest, or the Series H Preferred Units, with a mandatory liquidation preference of $25.00 per unit, which was issued in November 2011 as part of an acquisition. The Series H Preferred unitholders receive annual dividends of $1.50 per unit paid on a quarterly basis and dividends are cumulative, subject to certain provisions. The Series H Preferred Units can be redeemed at any time at par for cash at the Operating Partnership’s option or the option of the unitholder.
	The Operating Partnership also has 22,658 units of its 5.00% Series E Preferred Units of limited partnership interest outstanding with a mandatory liquidation preference of $1.00 per unit which are included and further described in Note 8, “Mortgages and other loans payable.”
	The Operating Partnership also has 60 units of its Series F Preferred Units outstanding with a mandatory liquidation preference of $1,000.00 per unit.

Stockholders_Equity_of_the_Com

Stockholders' Equity of the Company	12 Months Ended
	Dec. 31, 2013
Stockholders' Equity Note [Abstract]	'
Stockholders' Equity of the Company	'
	Stockholders’ Equity of the Company
	Common Stock
	Our authorized capital stock consists of 260,000,000 shares, $0.01 par value per share, consisting of 160,000,000 shares of common stock, $0.01 par value per share, 75,000,000 shares of excess stock, at $0.01 par value per share, and 25,000,000 shares of preferred stock, par value $0.01 per share. As of December 31, 2013, 94,993,284 shares of common stock and no shares of excess stock were issued and outstanding.
	In November 2013, the Company completed an offering of 2,600,000 shares of its common stock, par value $0.01 per share, at a price of $95.94 per share. The Company received net proceeds of approximately $248.9 million, after deducting offering expenses. The net proceeds from these offerings were contributed to the Operating Partnership in exchange for 2,600,000 common units of limited partnership interest and were used to repay debt, fund new investments and for other corporate purposes.
	At-The-Market Equity Offering Program
	In July 2011, the Company, along with the Operating Partnership, entered into an "at-the-market" equity offering program, or ATM Program, to sell an aggregate of $250.0 million of SL Green's common stock. During the year ended December 31, 2013, the Company sold 462,276 shares of SL Green's common stock through the ATM Program for aggregate gross proceeds of approximately $42.5 million ($41.8 million of net proceeds after related expenses). The net proceeds from these offerings were contributed to the Operating Partnership in exchange for 462,276 common units of limited partnership interest and were used to repay debt, fund new investments and for other corporate purposes. As of December 31, 2013, $2.8 million remained available for issuance of common stock under the ATM Program.
	Perpetual Preferred Stock
	We have 9,200,000 shares of our 6.50% Series I Cumulative Redeemable Preferred Stock, or the Series I Preferred Stock, outstanding with a mandatory liquidation preference of $25.00 per share. The Series I Preferred stockholders receive annual dividends of $1.625 per share paid on a quarterly basis and dividends are cumulative, subject to certain provisions. We are entitled to redeem the Series I Preferred Stock at par for cash at our option on or after August 10, 2017. In August 2012, we received $221.9 million in net proceeds from the issuance of the Series I Preferred Stock, which were recorded net of underwriters' discount and issuance costs, and contributed the net proceeds to the Operating Partnership in exchange for 9,200,000 units of 6.50% Series I Cumulative Redeemable Preferred Units of limited partnership interest, or the Series I Preferred Units.
	In June 2013, we redeemed the remaining 7,700,000 outstanding shares of our 7.625% Series C Cumulative Redeemable Preferred stock, or the Series C Preferred Stock at a redemption price of $25.00 per share plus $0.3495 in accumulated and unpaid dividends on such Preferred Stock through June 21, 2013. We recognized $12.2 million of costs to redeem the remaining Series C Preferred Stock. In September 2012, we had redeemed 4,000,000 shares of our 11,700,000 shares of Series C Preferred Stock, at a redemption price of $25.00 per share plus $0.3707 in accumulated and unpaid dividends on such Preferred Stock through September 24, 2012. We recognized $6.3 million of costs to redeem partially the Series C Preferred Stock. Simultaneously with each redemption, an equal number of 7.625% Series C Cumulative Redeemable Preferred Units of limited partnership interest of the Operating Partnership, or the Series C Preferred Units, were redeemed at the redemption price paid by us to the Series C Preferred stockholders. The Series C Preferred stockholders received annual dividends of $1.90625 per share paid on a quarterly basis and dividends were cumulative, subject to certain provisions.
	In July 2012, we redeemed all 4,000,000 shares of our 7.875% Series D Cumulative Redeemable Preferred stock, or Series D Preferred Stock, at a redemption price of $25.00 per share plus $0.4922 in accumulated and unpaid dividends on such Preferred Stock through July 14, 2012 and recognized $3.7 million of costs to redeem the Series D Preferred Stock. Simultaneously with that redemption, an equal number of 7.875% Series D Cumulative Redeemable Preferred Units of limited partnership interest of the Operating Partnership, or the Series D Preferred Units, were redeemed at the redemption price paid by SL Green to the Series D Preferred stockholders. The Series D Preferred stockholders received annual dividends of $1.96875 per share paid on a quarterly basis and dividends were cumulative, subject to certain provisions.
	Dividend Reinvestment and Stock Purchase Plan
	In March 2012, we filed a registration statement with the SEC for our dividend reinvestment and stock purchase plan, or DRIP, which automatically became effective upon filing. We registered 3,500,000 shares of SL Green's common stock under the DRIP. The DRIP commenced on September 24, 2001.
	During the years ended December 31, 2013 and 2012, we issued approximately 761 and 1,300,000 shares of SL Green's common stock and received approximately $66,600 and $99.6 million of proceeds, respectively, from dividend reinvestments and/or stock purchases under the DRIP. DRIP shares may be issued at a discount to the market price.
	Earnings per Share
	Earnings per share for the years ended December 31, 2013, 2012 and 2011 is computed as follows (in thousands):


		December 31,
	Numerator	2013				2012				2011
	Basic Earnings:
	Income attributable to SL Green common stockholders	$	101,330			$	155,984			$	617,232

	Effect of Dilutive Securities:
	Redemption of units to common shares	3,023				5,597				14,629

	Stock options	—				—				—

	Diluted Earnings:
	Income attributable to SL Green common stockholders	$	104,353			$	161,581			$	631,861



		December 31,
	Denominator	2013			2012			2011
	Basic Shares:
	Weighted average common stock outstanding	92,269			89,319			83,762

	Effect of Dilutive Securities:
	Redemption of units to common shares	2,735			3,207			1,985

	3.0% exchangeable senior debentures due 2017	—			—			—

	3.0% exchangeable senior debentures due 2027	—			—			—

	4.0% exchangeable senior debentures due 2025	—			—			—

	Stock-based compensation plans	262			347			497

	Diluted weighted average common stock outstanding	95,266			92,873			86,244

	We have excluded approximately 964,789, 627,000 and 680,000 common stock equivalents from the diluted shares outstanding for the years ended December 31, 2013, 2012 and 2011, respectively, as they were anti-dilutive.
	Partners' Capital of the Operating Partnership
	The Company is the sole general partner of the Operating Partnership and at December 31, 2013 owned 94,993,284 general and limited partnership interests in the Operating Partnership and 9,200,000 Series I Preferred Units. Partnership interests in the Operating Partnership are denominated as “common units of limited partnership interest” (also referred to as “OP Units”) or “preferred units of limited partnership interest” (also referred to as “Preferred Units”). All references to OP Units and Preferred Units outstanding exclude such units held by the Company. A holder of an OP Unit may present such OP Unit to the Operating Partnership for redemption at any time (subject to restrictions agreed upon at the issuance of OP Units to particular holders that may restrict such right for a period of time, generally one year from issuance). Upon presentation of an OP Unit for redemption, the Operating Partnership must redeem such OP Unit in exchange for the cash equal to the then value of a share of common stock of the Company, except that the Company may, at its election, in lieu of cash redemption, acquire such OP Unit for one share of common stock. Because the number of shares of common stock outstanding at all times equals the number of OP Units that the Company owns, one share of common stock is generally the economic equivalent of one OP Unit, and the quarterly distribution that may be paid to the holder of an OP Unit equals the quarterly dividend that may be paid to the holder of a share of common stock. Each series of Preferred Units makes a distribution that is set in accordance with an amendment to the partnership agreement of the Operating Partnership. Preferred Units may also be convertible into OP Units at the election of the holder thereof or the Company, subject to the terms of such Preferred Units.
	Net income (loss) allocated to the preferred unitholders and common unitholders reflects their pro rata share of net income (loss) and distributions.
	Limited Partner Units
	As of December 31, 2013, limited partners other than SL Green owned approximately 2.96% (2,902,317 common units) of the Operating Partnership.
	Preferred Units
	Preferred units not owned by SL Green are further described in Note 11, “Noncontrolling Interests on the Company’s Consolidated Financial Statements - Preferred Units of Limited Partnership Interest in the Operating Partnership.”
	Earnings per Unit
	Earnings per unit for the years ended December 31, 2013, 2012 and 2011 is computed as follows (in thousands):


		December 31,
Numerator	2013				2012				2011
Basic Earnings:
Income attributable to SLGOP common unitholders	$	104,353			$	161,581			$	631,861

Effect of Dilutive Securities:
Stock options	—				—				—

Diluted Earnings:
Income attributable to SLGOP common unitholders	$	104,353			$	161,581			$	631,861



	December 31,
Denominator	2013			2012			2011
Basic units:
Weighted average common units outstanding	95,004			92,526			85,747

Effect of Dilutive Securities:
3.0% exchangeable senior debentures due 2017	—			—			—

3.0% exchangeable senior debentures due 2027	—			—			—

4.0% exchangeable senior debentures due 2025	—			—			—

Stock-based compensation plans	262			347			497

Diluted weighted average common units outstanding	95,266			92,873			86,244


We have excluded approximately 964,789 ,627,000 and 680,000 common unit equivalents from the diluted units outstanding for the years ended December 31, 2013, 2012 and 2011, respectively, as they were anti-dilutive.

Partners_Capital_of_the_Operat

Partners' Capital of the Operating Partnership	12 Months Ended
	Dec. 31, 2013
Equity [Abstract]	'
Partners' Capital of the Operating Partnership	'
	Stockholders’ Equity of the Company
	Common Stock
	Our authorized capital stock consists of 260,000,000 shares, $0.01 par value per share, consisting of 160,000,000 shares of common stock, $0.01 par value per share, 75,000,000 shares of excess stock, at $0.01 par value per share, and 25,000,000 shares of preferred stock, par value $0.01 per share. As of December 31, 2013, 94,993,284 shares of common stock and no shares of excess stock were issued and outstanding.
	In November 2013, the Company completed an offering of 2,600,000 shares of its common stock, par value $0.01 per share, at a price of $95.94 per share. The Company received net proceeds of approximately $248.9 million, after deducting offering expenses. The net proceeds from these offerings were contributed to the Operating Partnership in exchange for 2,600,000 common units of limited partnership interest and were used to repay debt, fund new investments and for other corporate purposes.
	At-The-Market Equity Offering Program
	In July 2011, the Company, along with the Operating Partnership, entered into an "at-the-market" equity offering program, or ATM Program, to sell an aggregate of $250.0 million of SL Green's common stock. During the year ended December 31, 2013, the Company sold 462,276 shares of SL Green's common stock through the ATM Program for aggregate gross proceeds of approximately $42.5 million ($41.8 million of net proceeds after related expenses). The net proceeds from these offerings were contributed to the Operating Partnership in exchange for 462,276 common units of limited partnership interest and were used to repay debt, fund new investments and for other corporate purposes. As of December 31, 2013, $2.8 million remained available for issuance of common stock under the ATM Program.
	Perpetual Preferred Stock
	We have 9,200,000 shares of our 6.50% Series I Cumulative Redeemable Preferred Stock, or the Series I Preferred Stock, outstanding with a mandatory liquidation preference of $25.00 per share. The Series I Preferred stockholders receive annual dividends of $1.625 per share paid on a quarterly basis and dividends are cumulative, subject to certain provisions. We are entitled to redeem the Series I Preferred Stock at par for cash at our option on or after August 10, 2017. In August 2012, we received $221.9 million in net proceeds from the issuance of the Series I Preferred Stock, which were recorded net of underwriters' discount and issuance costs, and contributed the net proceeds to the Operating Partnership in exchange for 9,200,000 units of 6.50% Series I Cumulative Redeemable Preferred Units of limited partnership interest, or the Series I Preferred Units.
	In June 2013, we redeemed the remaining 7,700,000 outstanding shares of our 7.625% Series C Cumulative Redeemable Preferred stock, or the Series C Preferred Stock at a redemption price of $25.00 per share plus $0.3495 in accumulated and unpaid dividends on such Preferred Stock through June 21, 2013. We recognized $12.2 million of costs to redeem the remaining Series C Preferred Stock. In September 2012, we had redeemed 4,000,000 shares of our 11,700,000 shares of Series C Preferred Stock, at a redemption price of $25.00 per share plus $0.3707 in accumulated and unpaid dividends on such Preferred Stock through September 24, 2012. We recognized $6.3 million of costs to redeem partially the Series C Preferred Stock. Simultaneously with each redemption, an equal number of 7.625% Series C Cumulative Redeemable Preferred Units of limited partnership interest of the Operating Partnership, or the Series C Preferred Units, were redeemed at the redemption price paid by us to the Series C Preferred stockholders. The Series C Preferred stockholders received annual dividends of $1.90625 per share paid on a quarterly basis and dividends were cumulative, subject to certain provisions.
	In July 2012, we redeemed all 4,000,000 shares of our 7.875% Series D Cumulative Redeemable Preferred stock, or Series D Preferred Stock, at a redemption price of $25.00 per share plus $0.4922 in accumulated and unpaid dividends on such Preferred Stock through July 14, 2012 and recognized $3.7 million of costs to redeem the Series D Preferred Stock. Simultaneously with that redemption, an equal number of 7.875% Series D Cumulative Redeemable Preferred Units of limited partnership interest of the Operating Partnership, or the Series D Preferred Units, were redeemed at the redemption price paid by SL Green to the Series D Preferred stockholders. The Series D Preferred stockholders received annual dividends of $1.96875 per share paid on a quarterly basis and dividends were cumulative, subject to certain provisions.
	Dividend Reinvestment and Stock Purchase Plan
	In March 2012, we filed a registration statement with the SEC for our dividend reinvestment and stock purchase plan, or DRIP, which automatically became effective upon filing. We registered 3,500,000 shares of SL Green's common stock under the DRIP. The DRIP commenced on September 24, 2001.
	During the years ended December 31, 2013 and 2012, we issued approximately 761 and 1,300,000 shares of SL Green's common stock and received approximately $66,600 and $99.6 million of proceeds, respectively, from dividend reinvestments and/or stock purchases under the DRIP. DRIP shares may be issued at a discount to the market price.
	Earnings per Share
	Earnings per share for the years ended December 31, 2013, 2012 and 2011 is computed as follows (in thousands):


		December 31,
	Numerator	2013				2012				2011
	Basic Earnings:
	Income attributable to SL Green common stockholders	$	101,330			$	155,984			$	617,232

	Effect of Dilutive Securities:
	Redemption of units to common shares	3,023				5,597				14,629

	Stock options	—				—				—

	Diluted Earnings:
	Income attributable to SL Green common stockholders	$	104,353			$	161,581			$	631,861



		December 31,
	Denominator	2013			2012			2011
	Basic Shares:
	Weighted average common stock outstanding	92,269			89,319			83,762

	Effect of Dilutive Securities:
	Redemption of units to common shares	2,735			3,207			1,985

	3.0% exchangeable senior debentures due 2017	—			—			—

	3.0% exchangeable senior debentures due 2027	—			—			—

	4.0% exchangeable senior debentures due 2025	—			—			—

	Stock-based compensation plans	262			347			497

	Diluted weighted average common stock outstanding	95,266			92,873			86,244

	We have excluded approximately 964,789, 627,000 and 680,000 common stock equivalents from the diluted shares outstanding for the years ended December 31, 2013, 2012 and 2011, respectively, as they were anti-dilutive.
	Partners' Capital of the Operating Partnership
	The Company is the sole general partner of the Operating Partnership and at December 31, 2013 owned 94,993,284 general and limited partnership interests in the Operating Partnership and 9,200,000 Series I Preferred Units. Partnership interests in the Operating Partnership are denominated as “common units of limited partnership interest” (also referred to as “OP Units”) or “preferred units of limited partnership interest” (also referred to as “Preferred Units”). All references to OP Units and Preferred Units outstanding exclude such units held by the Company. A holder of an OP Unit may present such OP Unit to the Operating Partnership for redemption at any time (subject to restrictions agreed upon at the issuance of OP Units to particular holders that may restrict such right for a period of time, generally one year from issuance). Upon presentation of an OP Unit for redemption, the Operating Partnership must redeem such OP Unit in exchange for the cash equal to the then value of a share of common stock of the Company, except that the Company may, at its election, in lieu of cash redemption, acquire such OP Unit for one share of common stock. Because the number of shares of common stock outstanding at all times equals the number of OP Units that the Company owns, one share of common stock is generally the economic equivalent of one OP Unit, and the quarterly distribution that may be paid to the holder of an OP Unit equals the quarterly dividend that may be paid to the holder of a share of common stock. Each series of Preferred Units makes a distribution that is set in accordance with an amendment to the partnership agreement of the Operating Partnership. Preferred Units may also be convertible into OP Units at the election of the holder thereof or the Company, subject to the terms of such Preferred Units.
	Net income (loss) allocated to the preferred unitholders and common unitholders reflects their pro rata share of net income (loss) and distributions.
	Limited Partner Units
	As of December 31, 2013, limited partners other than SL Green owned approximately 2.96% (2,902,317 common units) of the Operating Partnership.
	Preferred Units
	Preferred units not owned by SL Green are further described in Note 11, “Noncontrolling Interests on the Company’s Consolidated Financial Statements - Preferred Units of Limited Partnership Interest in the Operating Partnership.”
	Earnings per Unit
	Earnings per unit for the years ended December 31, 2013, 2012 and 2011 is computed as follows (in thousands):


		December 31,
Numerator	2013				2012				2011
Basic Earnings:
Income attributable to SLGOP common unitholders	$	104,353			$	161,581			$	631,861

Effect of Dilutive Securities:
Stock options	—				—				—

Diluted Earnings:
Income attributable to SLGOP common unitholders	$	104,353			$	161,581			$	631,861



	December 31,
Denominator	2013			2012			2011
Basic units:
Weighted average common units outstanding	95,004			92,526			85,747

Effect of Dilutive Securities:
3.0% exchangeable senior debentures due 2017	—			—			—

3.0% exchangeable senior debentures due 2027	—			—			—

4.0% exchangeable senior debentures due 2025	—			—			—

Stock-based compensation plans	262			347			497

Diluted weighted average common units outstanding	95,266			92,873			86,244


We have excluded approximately 964,789 ,627,000 and 680,000 common unit equivalents from the diluted units outstanding for the years ended December 31, 2013, 2012 and 2011, respectively, as they were anti-dilutive.

Sharebased_Compensation

Share-based Compensation	12 Months Ended
	Dec. 31, 2013
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]	'
Share-based Compensation	'
	Share-based Compensation
	We have a stock-based employee and director compensation plans. Our employees are compensated through the Operating Partnership. Under each plan, whenever the Company issues common or preferred stock, the Operating Partnership issues an equivalent number of units of limited partnership interest of a corresponding class to the Company.
	Third Amended and Restated 2005 Stock Option and Incentive Plan
	The Third Amended and Restated 2005 Stock Option and Incentive Plan, or the 2005 Plan, was approved by the Company's board of directors in April 2013 and its stockholders in June 2013 at the Company's annual meeting of stockholders. The 2005 Plan authorizes the issuance of stock options, stock appreciation rights, unrestricted and restricted stock, phantom shares, dividend equivalent rights and other equity-based awards. Subject to adjustments upon certain corporate transactions or events, awards with respect to up to a maximum of 17,130,000 fungible units may be granted under the 2005 Plan. Currently, different types of awards count against the limit on the number of fungible units differently, with (1) full-value awards (i.e., those that deliver the full value of the award upon vesting, such as restricted stock) counting as 2.76 fungible units per share subject to such award (2) stock options, stock appreciation rights and other awards that do not deliver full value and expire five years from the date of grant counting as 0.77 fungible units per share subject to such award and (3) all other awards (e.g., ten-year stock options) counting as 1.0 fungible units per share subject to such award. Awards granted under the 2005 Plan prior to the approval of the second amendment and restatement in June 2010 and third amendment and restatement in June 2013 continue to count against the fungible unit limit based on the ratios that were in effect at the time such awards were granted, which may be different than the current ratios. As a result, depending on the types of awards issued, the 2005 Plan may result in the issuance of more or less than 17,130,000 shares. If a stock option or other award granted under the 2005 Plan expires or terminates, the common stock subject to any portion of the award that expires or terminates without having been exercised or paid, as the case may be, will again become available for the issuance of additional awards. Shares of SL Green's common stock distributed under the 2005 Plan may be treasury shares or authorized but unissued shares. Currently, unless the 2005 Plan has been previously terminated by the board of directors, new awards may be granted under the 2005 Plan until June 13, 2023, which is the tenth anniversary of the date that the 2005 Plan was most recently approved by the Company's stockholders. As of December 31, 2013, 4.2 million fungible units were available for issuance under the 2005 Plan after reserving for shares underlying outstanding restricted stock units, phantom stock units granted pursuant to our Non-Employee Directors' Deferral Program and LTIP Units, including, among others, outstanding LTIP Units issued under our 2011 Long-Term Outperformance Plan, which remain subject to performance-based vesting.
	Options are granted under the plan at the fair market value on the date of grant and, subject to termination of employment, generally expire five or ten years from the date of grant, are not transferable other than on death, and generally vest in one to five years commencing one year from the date of grant.
	The fair value of each stock option granted is estimated on the date of grant using the Black-Scholes option pricing model based on historical information with the following weighted average assumptions for grants during the years ended December 31, 2013, 2012 and 2011, respectively.


		2013			2012			2011
	Dividend yield	1.92	%		2	%		2	%
	Expected life of option	4.1 years			3.7 years			4.2 years

	Risk-free interest rate	0.96	%		0.46	%		1	%
	Expected stock price volatility	36.12	%		37.4	%		47.98	%

	A summary of the status of our stock options as of December 31, 2013, 2012 and 2011 and changes during the years then ended are presented below:


		2013								2012					2011
		Options				Weighted				Options			Weighted		Options			Weighted
		Outstanding				Average				Outstanding			Average		Outstanding			Average
						Exercise							Exercise					Exercise
						Price							Price					Price
	Balance at beginning of year	1,201,000				$	75.05			1,277,200			$	63.37	1,353,002			$	58.85

	Granted	828,100				87.23				361,331			75.36		212,400			66.42

	Exercised	(223,531		)		53.93				(382,612		)	36.65		(243,901		)	40.48

	Lapsed or cancelled	(40,535		)		83.94				(54,919		)	72.99		(44,301		)	65.89

	Balance at end of year	1,765,034				$	83.24			1,201,000			$	75.05	1,277,200			$	63.37

	Options exercisable at end of year	461,458				$	89.38			479,913			$	86.85	644,429			$	72.31

	Weighted average fair value of options granted during the year	$	18,041,576							$	6,602,967				$	4,647,554


	All options were granted within a price range of $20.67 to $137.18. The remaining weighted average contractual life of the options outstanding was 4.60 years and the remaining average contractual life of the options exercisable was 3.83 years.
	During the years ended December 31, 2013, 2012, and 2011, we recognized approximately $6.5 million, $5.1 million and $4.7 million of compensation expense, respectively, for these options. As of December 31, 2013, there was approximately $20.3 million of total unrecognized compensation cost related to unvested stock options, which is expected to be recognized over a weighted average period of three years.
	Stock-based Compensation
	Effective January 1, 1999, we implemented a deferred compensation plan, or the Deferred Plan, covering certain of our employees, including our executives. The shares issued under the Deferred Plan were granted to certain employees, including our executives and vesting will occur annually upon the completion of a service period or our meeting established financial performance criteria. Annual vesting occurs at rates ranging from 15% to 35% once performance criteria are reached. A summary of our restricted stock as of December 31, 2013, 2012 and 2011 and charges during the years then ended are presented below:


		2013				2012				2011
	Balance at beginning of year	2,804,901				2,912,456				2,728,290

	Granted	192,563				92,729				185,333

	Cancelled	(3,267		)		(200,284		)		(1,167		)
	Balance at end of year	2,994,197				2,804,901				2,912,456

	Vested during the year	21,074				408,800				66,299

	Compensation expense recorded	$	6,713,155			$	6,930,381			$	17,365,401

	Weighted average fair value of restricted stock granted during the year	$	17,386,949			$	7,023,942			$	21,768,084


	The fair value of restricted stock that vested during the years ended December 31, 2013, 2012 and 2011 was $1.6 million, $22.4 million and $4.3 million, respectively. As of December 31, 2013, there was $17.8 million of total unrecognized compensation cost related to unvested restricted stock, which is expected to be recognized over a weighted average period of approximately 2.7 years.
	For the years ended December 31, 2013, 2012 and 2011, approximately $4.5 million, $4.1 million and $3.4 million, respectively, was capitalized to assets associated with compensation expense related to our long-term compensation plans, restricted stock and stock options.
	We granted LTIP units, which include bonus, time-based and performance based awards, with a fair value of $27.1 million, zero and $8.5 million as of 2013, 2012 and 2011, respectively. The grant date fair value of the LTIP unit awards was calculated in accordance with ASC 718. A third party consultant determined the fair value of the LTIP units to have a discount from SL Green's common stock price. The discount was calculated by considering the inherent uncertainty that the LTIP units will reach parity with other common partnership units and the illiquidity due to transfer restrictions. As of December 31, 2013, there was $5.0 million of total unrecognized compensation expense related to the time-based and performance based awards, which is expected to be recognized over a weighted average period of approximately 1.5 years. During the years ended December 31, 2013, 2012 and 2011, we recorded compensation expense related to bonus, time-based and performance based awards of approximately $27.3 million, $12.6 million and $8.5 million, respectively.
	2010 Notional Unit Long-Term Compensation Plan
In December 2009, the compensation committee of the Company's board of directors approved the general terms of the SL Green Realty Corp. 2010 Notional Unit Long-Term Compensation Program, or the 2010 Long-Term Compensation Plan. The 2010 Long-Term Compensation Plan is a long-term incentive compensation plan pursuant to which award recipients could earn, in the aggregate, from approximately $15.0 million up to approximately $75.0 million of LTIP Units in the Operating Partnership based on our stock price appreciation over three years beginning on December 1, 2009; provided that, if maximum performance had been achieved, approximately $25.0 million of awards could be earned at any time after the beginning of the second year and an additional approximately $25.0 million of awards could be earned at any time after the beginning of the third year. In order to achieve maximum performance under the 2010 Long-Term Compensation Plan, our aggregate stock price appreciation during the performance period had to equal or exceed 50%. The compensation committee determined that maximum performance had been achieved at or shortly after the beginning of each of the second and third years of the performance period and for the full performance period and, accordingly, 366,815 LTIP Units, 385,583 LTIP Units and 327,416 LTIP Units were earned under the 2010 Long-Term Compensation Plan in December 2010, 2011 and 2012, respectively. Substantially in accordance with the original terms of the program, 50% of these LTIP Units vested on December 17, 2012 (accelerated from the original January 1, 2013 vesting date), 25% of these LTIP Units vested on December 11, 2013 (accelerated from the original January 1, 2014 vesting date) and the remainder is scheduled to vest on January 1, 2015 based on continued employment. In accordance with the terms of the 2010 Long-Term Compensation Plan, distributions were not paid on any LTIP Units until they were earned, at which time we paid all distributions that would have been paid on the earned LTIP Units since the beginning of the performance period.
The cost of the 2010 Long-Term Compensation Plan (approximately $31.7 million, subject to forfeitures) will be amortized into earnings through the final vesting period. We recorded compensation expense of approximately $4.5 million, $10.7 million and $9.3 million during the years ended December 31, 2013, 2012 and 2011, respectively, related to the 2010 Long-Term Compensation Plan.
2011 Outperformance Plan
In August 2011, the compensation committee of the Company's board of directors approved the general terms of the SL Green Realty Corp. 2011 Outperformance Plan, or the 2011 Outperformance Plan. Participants in the 2011 Outperformance Plan may earn, in the aggregate, up to $85.0 million of LTIP Units in the Operating Partnership based on our total return to stockholders for the three-year period beginning September 1, 2011. Under the 2011 Outperformance Plan, participants will be entitled to share in a "performance pool" comprised of LTIP Units with a value equal to 10% of the amount, if any, by which our total return to stockholders during the three-year period exceeds a cumulative total return to stockholders of 25%, subject to the maximum of $85.0 million of LTIP Units; provided that if maximum performance has been achieved, approximately one-third of each award may be earned at any time after the beginning of the second year and an additional approximately one-third of each award may be earned at any time after the beginning of the third year. LTIP Units earned under the 2011 Outperformance Plan will be subject to continued vesting requirements, with 50% of any awards earned vesting on August 31, 2014 and the remaining 50% vesting on August 31, 2015, subject to continued employment with us through such dates. Participants will not be entitled to distributions with respect to LTIP Units granted under the 2011 Outperformance Plan unless and until they are earned. If LTIP Units are earned, each participant will also be entitled to the distributions that would have been paid had the number of earned LTIP Units been issued at the beginning of the performance period, with such distributions being paid in the form of additional LTIP Units. Thereafter, distributions will be paid currently with respect to all earned LTIP Units, whether vested or unvested.
The cost of the 2011 Outperformance Plan (approximately $26.3 million, subject to forfeitures) will be amortized into earnings through the final vesting period. We recorded compensation expense of approximately $8.0 million, $5.5 million and $0.1 million during the years ended December 31, 2013, 2012 and 2011, respectively, related to the 2011 Outperformance Plan.
Deferred Compensation Plan for Directors
Under our Non-Employee Director's Deferral Program, which commenced July 2004, the Company's non-employee directors may elect to defer up to 100% of their annual retainer fee, chairman fees, meeting fees and annual stock grant. Unless otherwise elected by a participant, fees deferred under the program shall be credited in the form of phantom stock units. The program provides that a director's phantom stock units generally will be settled in an equal number of shares of common stock upon the earlier of (i) the January 1 coincident with or next following such director's termination of service from the Board of Directors or (ii) a change in control by us, as defined by the program. Phantom stock units are credited to each non-employee director quarterly using the closing price of SL Green's common stock on the first business day of the respective quarter. Each participating non-employee director is also credited with dividend equivalents or phantom stock units based on the dividend rate for each quarter, which are either paid in cash currently or credited to the director’s account as additional phantom stock units.
During the year ended December 31, 2013, approximately 7,622 phantom stock units were earned. As of December 31, 2013, there were approximately 73,524 phantom stock units outstanding pursuant to our Non-Employee Director's Deferral Program.
Employee Stock Purchase Plan
On September 18, 2007, the Company's board of directors adopted the 2008 Employee Stock Purchase Plan, or ESPP, to encourage our employees to increase their efforts to make our business more successful by providing equity-based incentives to eligible employees. The ESPP is intended to qualify as an "employee stock purchase plan" under Section 423 of the Code, and has been adopted by the board to enable our eligible employees to purchase our shares of common stock through payroll deductions. The ESPP became effective on January 1, 2008 with a maximum of 500,000 shares of the common stock available for issuance, subject to adjustment upon a merger, reorganization, stock split or other similar corporate change. The Company filed a registration statement on Form S-8 with the SEC with respect to the ESPP. The common stock is offered for purchase through a series of successive offering periods. Each offering period will be three months in duration and will begin on the first day of each calendar quarter, with the first offering period having commenced on January 1, 2008. The ESPP provides for eligible employees to purchase the common stock at a purchase price equal to 85% of the lesser of (1) the market value of the common stock on the first day of the offering period or (2) the market value of the common stock on the last day of the offering period. The ESPP was approved by our stockholders at our 2008 annual meeting of stockholders. As of December 31, 2013, approximately 73,635 shares of SL Green's common stock had been issued under the ESPP.

Accumulated_Other_Comprehensiv

Accumulated Other Comprehensive Loss of the Company	12 Months Ended
	Dec. 31, 2013
Accumulated Other Comprehensive Income (Loss) [Line Items]	'
Accumulated Other Comprehensive Loss of the Company	'
	Stockholders’ Equity of the Company
	Common Stock
	Our authorized capital stock consists of 260,000,000 shares, $0.01 par value per share, consisting of 160,000,000 shares of common stock, $0.01 par value per share, 75,000,000 shares of excess stock, at $0.01 par value per share, and 25,000,000 shares of preferred stock, par value $0.01 per share. As of December 31, 2013, 94,993,284 shares of common stock and no shares of excess stock were issued and outstanding.
	In November 2013, the Company completed an offering of 2,600,000 shares of its common stock, par value $0.01 per share, at a price of $95.94 per share. The Company received net proceeds of approximately $248.9 million, after deducting offering expenses. The net proceeds from these offerings were contributed to the Operating Partnership in exchange for 2,600,000 common units of limited partnership interest and were used to repay debt, fund new investments and for other corporate purposes.
	At-The-Market Equity Offering Program
	In July 2011, the Company, along with the Operating Partnership, entered into an "at-the-market" equity offering program, or ATM Program, to sell an aggregate of $250.0 million of SL Green's common stock. During the year ended December 31, 2013, the Company sold 462,276 shares of SL Green's common stock through the ATM Program for aggregate gross proceeds of approximately $42.5 million ($41.8 million of net proceeds after related expenses). The net proceeds from these offerings were contributed to the Operating Partnership in exchange for 462,276 common units of limited partnership interest and were used to repay debt, fund new investments and for other corporate purposes. As of December 31, 2013, $2.8 million remained available for issuance of common stock under the ATM Program.
	Perpetual Preferred Stock
	We have 9,200,000 shares of our 6.50% Series I Cumulative Redeemable Preferred Stock, or the Series I Preferred Stock, outstanding with a mandatory liquidation preference of $25.00 per share. The Series I Preferred stockholders receive annual dividends of $1.625 per share paid on a quarterly basis and dividends are cumulative, subject to certain provisions. We are entitled to redeem the Series I Preferred Stock at par for cash at our option on or after August 10, 2017. In August 2012, we received $221.9 million in net proceeds from the issuance of the Series I Preferred Stock, which were recorded net of underwriters' discount and issuance costs, and contributed the net proceeds to the Operating Partnership in exchange for 9,200,000 units of 6.50% Series I Cumulative Redeemable Preferred Units of limited partnership interest, or the Series I Preferred Units.
	In June 2013, we redeemed the remaining 7,700,000 outstanding shares of our 7.625% Series C Cumulative Redeemable Preferred stock, or the Series C Preferred Stock at a redemption price of $25.00 per share plus $0.3495 in accumulated and unpaid dividends on such Preferred Stock through June 21, 2013. We recognized $12.2 million of costs to redeem the remaining Series C Preferred Stock. In September 2012, we had redeemed 4,000,000 shares of our 11,700,000 shares of Series C Preferred Stock, at a redemption price of $25.00 per share plus $0.3707 in accumulated and unpaid dividends on such Preferred Stock through September 24, 2012. We recognized $6.3 million of costs to redeem partially the Series C Preferred Stock. Simultaneously with each redemption, an equal number of 7.625% Series C Cumulative Redeemable Preferred Units of limited partnership interest of the Operating Partnership, or the Series C Preferred Units, were redeemed at the redemption price paid by us to the Series C Preferred stockholders. The Series C Preferred stockholders received annual dividends of $1.90625 per share paid on a quarterly basis and dividends were cumulative, subject to certain provisions.
	In July 2012, we redeemed all 4,000,000 shares of our 7.875% Series D Cumulative Redeemable Preferred stock, or Series D Preferred Stock, at a redemption price of $25.00 per share plus $0.4922 in accumulated and unpaid dividends on such Preferred Stock through July 14, 2012 and recognized $3.7 million of costs to redeem the Series D Preferred Stock. Simultaneously with that redemption, an equal number of 7.875% Series D Cumulative Redeemable Preferred Units of limited partnership interest of the Operating Partnership, or the Series D Preferred Units, were redeemed at the redemption price paid by SL Green to the Series D Preferred stockholders. The Series D Preferred stockholders received annual dividends of $1.96875 per share paid on a quarterly basis and dividends were cumulative, subject to certain provisions.
	Dividend Reinvestment and Stock Purchase Plan
	In March 2012, we filed a registration statement with the SEC for our dividend reinvestment and stock purchase plan, or DRIP, which automatically became effective upon filing. We registered 3,500,000 shares of SL Green's common stock under the DRIP. The DRIP commenced on September 24, 2001.
	During the years ended December 31, 2013 and 2012, we issued approximately 761 and 1,300,000 shares of SL Green's common stock and received approximately $66,600 and $99.6 million of proceeds, respectively, from dividend reinvestments and/or stock purchases under the DRIP. DRIP shares may be issued at a discount to the market price.
	Earnings per Share
	Earnings per share for the years ended December 31, 2013, 2012 and 2011 is computed as follows (in thousands):


		December 31,
	Numerator	2013				2012				2011
	Basic Earnings:
	Income attributable to SL Green common stockholders	$	101,330			$	155,984			$	617,232

	Effect of Dilutive Securities:
	Redemption of units to common shares	3,023				5,597				14,629

	Stock options	—				—				—

	Diluted Earnings:
	Income attributable to SL Green common stockholders	$	104,353			$	161,581			$	631,861



		December 31,
	Denominator	2013			2012			2011
	Basic Shares:
	Weighted average common stock outstanding	92,269			89,319			83,762

	Effect of Dilutive Securities:
	Redemption of units to common shares	2,735			3,207			1,985

	3.0% exchangeable senior debentures due 2017	—			—			—

	3.0% exchangeable senior debentures due 2027	—			—			—

	4.0% exchangeable senior debentures due 2025	—			—			—

	Stock-based compensation plans	262			347			497

	Diluted weighted average common stock outstanding	95,266			92,873			86,244

	We have excluded approximately 964,789, 627,000 and 680,000 common stock equivalents from the diluted shares outstanding for the years ended December 31, 2013, 2012 and 2011, respectively, as they were anti-dilutive.
	Partners' Capital of the Operating Partnership
	The Company is the sole general partner of the Operating Partnership and at December 31, 2013 owned 94,993,284 general and limited partnership interests in the Operating Partnership and 9,200,000 Series I Preferred Units. Partnership interests in the Operating Partnership are denominated as “common units of limited partnership interest” (also referred to as “OP Units”) or “preferred units of limited partnership interest” (also referred to as “Preferred Units”). All references to OP Units and Preferred Units outstanding exclude such units held by the Company. A holder of an OP Unit may present such OP Unit to the Operating Partnership for redemption at any time (subject to restrictions agreed upon at the issuance of OP Units to particular holders that may restrict such right for a period of time, generally one year from issuance). Upon presentation of an OP Unit for redemption, the Operating Partnership must redeem such OP Unit in exchange for the cash equal to the then value of a share of common stock of the Company, except that the Company may, at its election, in lieu of cash redemption, acquire such OP Unit for one share of common stock. Because the number of shares of common stock outstanding at all times equals the number of OP Units that the Company owns, one share of common stock is generally the economic equivalent of one OP Unit, and the quarterly distribution that may be paid to the holder of an OP Unit equals the quarterly dividend that may be paid to the holder of a share of common stock. Each series of Preferred Units makes a distribution that is set in accordance with an amendment to the partnership agreement of the Operating Partnership. Preferred Units may also be convertible into OP Units at the election of the holder thereof or the Company, subject to the terms of such Preferred Units.
	Net income (loss) allocated to the preferred unitholders and common unitholders reflects their pro rata share of net income (loss) and distributions.
	Limited Partner Units
	As of December 31, 2013, limited partners other than SL Green owned approximately 2.96% (2,902,317 common units) of the Operating Partnership.
	Preferred Units
	Preferred units not owned by SL Green are further described in Note 11, “Noncontrolling Interests on the Company’s Consolidated Financial Statements - Preferred Units of Limited Partnership Interest in the Operating Partnership.”
	Earnings per Unit
	Earnings per unit for the years ended December 31, 2013, 2012 and 2011 is computed as follows (in thousands):


		December 31,
Numerator	2013				2012				2011
Basic Earnings:
Income attributable to SLGOP common unitholders	$	104,353			$	161,581			$	631,861

Effect of Dilutive Securities:
Stock options	—				—				—

Diluted Earnings:
Income attributable to SLGOP common unitholders	$	104,353			$	161,581			$	631,861



	December 31,
Denominator	2013			2012			2011
Basic units:
Weighted average common units outstanding	95,004			92,526			85,747

Effect of Dilutive Securities:
3.0% exchangeable senior debentures due 2017	—			—			—

3.0% exchangeable senior debentures due 2027	—			—			—

4.0% exchangeable senior debentures due 2025	—			—			—

Stock-based compensation plans	262			347			497

Diluted weighted average common units outstanding	95,266			92,873			86,244


We have excluded approximately 964,789 ,627,000 and 680,000 common unit equivalents from the diluted units outstanding for the years ended December 31, 2013, 2012 and 2011, respectively, as they were anti-dilutive.
SL Green Realty Corp	'
Accumulated Other Comprehensive Income (Loss) [Line Items]	'
Accumulated Other Comprehensive Loss of the Company	'
	Accumulated Other Comprehensive Loss of the Company
	The following tables set forth the changes in accumulated other comprehensive income (loss) by component as of December 31, 2013, 2012 and 2011:


		Net unrealized loss on derivative instruments (1)				SL Green’s share of joint venture net unrealized loss on derivative instruments (2)				Unrealized gains and loss on marketable securities			Total
	Balance at December 31, 2010	$	(14,009	)		$	(18,303	)		$	9,653		$	(22,659	)

	Other comprehensive (loss) income before reclassifications	(5,019		)		(9,914		)		(4,682		)	(19,615		)
	Amounts reclassified from accumulated other comprehensive income (loss)	1,518				10,816				1,495			13,829

	Balance at December 31, 2011	(17,510		)		(17,401		)		6,466			(28,445		)

	Other comprehensive (loss) income before reclassifications	(1,124		)		(9,098		)		(4,879		)	(15,101		)
	Amounts reclassified from accumulated other comprehensive income (loss)	1,800				10,436				1,723			13,959

	Balance at December 31, 2012	(16,834		)		(16,063		)		3,310			(29,587		)

	Other comprehensive (loss) income before reclassifications	(168		)		6,267				1,474			7,573

	Amounts reclassified from accumulated other comprehensive income (loss)	1,877				4,926				—			6,803

	Balance at December 31, 2013	$	(15,125	)		$	(4,870	)		$	4,784		$	(15,211	)

	___________________________

	-1	Amount reclassified from accumulated other comprehensive income (loss) is included in interest expense in the respective consolidated statements of income. As of December 31, 2013, 2012 and 2011, the deferred net losses from these terminated hedges, which is included in accumulated other comprehensive loss relating to net unrealized loss on derivative instrument, was approximately $13.8 million , $15.0 million and $16.3 million, respectively.

	-2	Amount reclassified from accumulated other comprehensive income (loss) is included in equity in net income from unconsolidated joint ventures in the respective consolidated statements of income.

Accumulated_Other_Comprehensiv1

Accumulated Other Comprehensive Loss of the Operating Partnership	12 Months Ended
	Dec. 31, 2013
Accumulated Other Comprehensive Income (Loss) [Line Items]	'
Accumulated Other Comprehensive Loss of the Company	'
	Stockholders’ Equity of the Company
	Common Stock
	Our authorized capital stock consists of 260,000,000 shares, $0.01 par value per share, consisting of 160,000,000 shares of common stock, $0.01 par value per share, 75,000,000 shares of excess stock, at $0.01 par value per share, and 25,000,000 shares of preferred stock, par value $0.01 per share. As of December 31, 2013, 94,993,284 shares of common stock and no shares of excess stock were issued and outstanding.
	In November 2013, the Company completed an offering of 2,600,000 shares of its common stock, par value $0.01 per share, at a price of $95.94 per share. The Company received net proceeds of approximately $248.9 million, after deducting offering expenses. The net proceeds from these offerings were contributed to the Operating Partnership in exchange for 2,600,000 common units of limited partnership interest and were used to repay debt, fund new investments and for other corporate purposes.
	At-The-Market Equity Offering Program
	In July 2011, the Company, along with the Operating Partnership, entered into an "at-the-market" equity offering program, or ATM Program, to sell an aggregate of $250.0 million of SL Green's common stock. During the year ended December 31, 2013, the Company sold 462,276 shares of SL Green's common stock through the ATM Program for aggregate gross proceeds of approximately $42.5 million ($41.8 million of net proceeds after related expenses). The net proceeds from these offerings were contributed to the Operating Partnership in exchange for 462,276 common units of limited partnership interest and were used to repay debt, fund new investments and for other corporate purposes. As of December 31, 2013, $2.8 million remained available for issuance of common stock under the ATM Program.
	Perpetual Preferred Stock
	We have 9,200,000 shares of our 6.50% Series I Cumulative Redeemable Preferred Stock, or the Series I Preferred Stock, outstanding with a mandatory liquidation preference of $25.00 per share. The Series I Preferred stockholders receive annual dividends of $1.625 per share paid on a quarterly basis and dividends are cumulative, subject to certain provisions. We are entitled to redeem the Series I Preferred Stock at par for cash at our option on or after August 10, 2017. In August 2012, we received $221.9 million in net proceeds from the issuance of the Series I Preferred Stock, which were recorded net of underwriters' discount and issuance costs, and contributed the net proceeds to the Operating Partnership in exchange for 9,200,000 units of 6.50% Series I Cumulative Redeemable Preferred Units of limited partnership interest, or the Series I Preferred Units.
	In June 2013, we redeemed the remaining 7,700,000 outstanding shares of our 7.625% Series C Cumulative Redeemable Preferred stock, or the Series C Preferred Stock at a redemption price of $25.00 per share plus $0.3495 in accumulated and unpaid dividends on such Preferred Stock through June 21, 2013. We recognized $12.2 million of costs to redeem the remaining Series C Preferred Stock. In September 2012, we had redeemed 4,000,000 shares of our 11,700,000 shares of Series C Preferred Stock, at a redemption price of $25.00 per share plus $0.3707 in accumulated and unpaid dividends on such Preferred Stock through September 24, 2012. We recognized $6.3 million of costs to redeem partially the Series C Preferred Stock. Simultaneously with each redemption, an equal number of 7.625% Series C Cumulative Redeemable Preferred Units of limited partnership interest of the Operating Partnership, or the Series C Preferred Units, were redeemed at the redemption price paid by us to the Series C Preferred stockholders. The Series C Preferred stockholders received annual dividends of $1.90625 per share paid on a quarterly basis and dividends were cumulative, subject to certain provisions.
	In July 2012, we redeemed all 4,000,000 shares of our 7.875% Series D Cumulative Redeemable Preferred stock, or Series D Preferred Stock, at a redemption price of $25.00 per share plus $0.4922 in accumulated and unpaid dividends on such Preferred Stock through July 14, 2012 and recognized $3.7 million of costs to redeem the Series D Preferred Stock. Simultaneously with that redemption, an equal number of 7.875% Series D Cumulative Redeemable Preferred Units of limited partnership interest of the Operating Partnership, or the Series D Preferred Units, were redeemed at the redemption price paid by SL Green to the Series D Preferred stockholders. The Series D Preferred stockholders received annual dividends of $1.96875 per share paid on a quarterly basis and dividends were cumulative, subject to certain provisions.
	Dividend Reinvestment and Stock Purchase Plan
	In March 2012, we filed a registration statement with the SEC for our dividend reinvestment and stock purchase plan, or DRIP, which automatically became effective upon filing. We registered 3,500,000 shares of SL Green's common stock under the DRIP. The DRIP commenced on September 24, 2001.
	During the years ended December 31, 2013 and 2012, we issued approximately 761 and 1,300,000 shares of SL Green's common stock and received approximately $66,600 and $99.6 million of proceeds, respectively, from dividend reinvestments and/or stock purchases under the DRIP. DRIP shares may be issued at a discount to the market price.
	Earnings per Share
	Earnings per share for the years ended December 31, 2013, 2012 and 2011 is computed as follows (in thousands):


		December 31,
	Numerator	2013				2012				2011
	Basic Earnings:
	Income attributable to SL Green common stockholders	$	101,330			$	155,984			$	617,232

	Effect of Dilutive Securities:
	Redemption of units to common shares	3,023				5,597				14,629

	Stock options	—				—				—

	Diluted Earnings:
	Income attributable to SL Green common stockholders	$	104,353			$	161,581			$	631,861



		December 31,
	Denominator	2013			2012			2011
	Basic Shares:
	Weighted average common stock outstanding	92,269			89,319			83,762

	Effect of Dilutive Securities:
	Redemption of units to common shares	2,735			3,207			1,985

	3.0% exchangeable senior debentures due 2017	—			—			—

	3.0% exchangeable senior debentures due 2027	—			—			—

	4.0% exchangeable senior debentures due 2025	—			—			—

	Stock-based compensation plans	262			347			497

	Diluted weighted average common stock outstanding	95,266			92,873			86,244

	We have excluded approximately 964,789, 627,000 and 680,000 common stock equivalents from the diluted shares outstanding for the years ended December 31, 2013, 2012 and 2011, respectively, as they were anti-dilutive.
	Partners' Capital of the Operating Partnership
	The Company is the sole general partner of the Operating Partnership and at December 31, 2013 owned 94,993,284 general and limited partnership interests in the Operating Partnership and 9,200,000 Series I Preferred Units. Partnership interests in the Operating Partnership are denominated as “common units of limited partnership interest” (also referred to as “OP Units”) or “preferred units of limited partnership interest” (also referred to as “Preferred Units”). All references to OP Units and Preferred Units outstanding exclude such units held by the Company. A holder of an OP Unit may present such OP Unit to the Operating Partnership for redemption at any time (subject to restrictions agreed upon at the issuance of OP Units to particular holders that may restrict such right for a period of time, generally one year from issuance). Upon presentation of an OP Unit for redemption, the Operating Partnership must redeem such OP Unit in exchange for the cash equal to the then value of a share of common stock of the Company, except that the Company may, at its election, in lieu of cash redemption, acquire such OP Unit for one share of common stock. Because the number of shares of common stock outstanding at all times equals the number of OP Units that the Company owns, one share of common stock is generally the economic equivalent of one OP Unit, and the quarterly distribution that may be paid to the holder of an OP Unit equals the quarterly dividend that may be paid to the holder of a share of common stock. Each series of Preferred Units makes a distribution that is set in accordance with an amendment to the partnership agreement of the Operating Partnership. Preferred Units may also be convertible into OP Units at the election of the holder thereof or the Company, subject to the terms of such Preferred Units.
	Net income (loss) allocated to the preferred unitholders and common unitholders reflects their pro rata share of net income (loss) and distributions.
	Limited Partner Units
	As of December 31, 2013, limited partners other than SL Green owned approximately 2.96% (2,902,317 common units) of the Operating Partnership.
	Preferred Units
	Preferred units not owned by SL Green are further described in Note 11, “Noncontrolling Interests on the Company’s Consolidated Financial Statements - Preferred Units of Limited Partnership Interest in the Operating Partnership.”
	Earnings per Unit
	Earnings per unit for the years ended December 31, 2013, 2012 and 2011 is computed as follows (in thousands):


		December 31,
Numerator	2013				2012				2011
Basic Earnings:
Income attributable to SLGOP common unitholders	$	104,353			$	161,581			$	631,861

Effect of Dilutive Securities:
Stock options	—				—				—

Diluted Earnings:
Income attributable to SLGOP common unitholders	$	104,353			$	161,581			$	631,861



	December 31,
Denominator	2013			2012			2011
Basic units:
Weighted average common units outstanding	95,004			92,526			85,747

Effect of Dilutive Securities:
3.0% exchangeable senior debentures due 2017	—			—			—

3.0% exchangeable senior debentures due 2027	—			—			—

4.0% exchangeable senior debentures due 2025	—			—			—

Stock-based compensation plans	262			347			497

Diluted weighted average common units outstanding	95,266			92,873			86,244


We have excluded approximately 964,789 ,627,000 and 680,000 common unit equivalents from the diluted units outstanding for the years ended December 31, 2013, 2012 and 2011, respectively, as they were anti-dilutive.
SL Green Operating Partnership	'
Accumulated Other Comprehensive Income (Loss) [Line Items]	'
Accumulated Other Comprehensive Loss of the Company	'
	Accumulated Other Comprehensive Loss of the Operating Partnership
	The following tables set forth the changes in accumulated other comprehensive income (loss) by component as of December 31, 2013, 2012 and 2011:


		Net unrealized loss on derivative instruments (1)				SLGOP’s share of joint venture net unrealized loss on derivative instruments (2)				Unrealized gains and loss on marketable securities			Total
	Balance at December 31, 2010	$	(14,246	)		$	(18,613	)		$	9,817		$	(23,042	)

	Other comprehensive loss before reclassifications	(5,699		)		(10,273		)		(4,261		)	(20,233		)
	Amounts reclassified from accumulated other comprehensive income (loss)	1,554				11,072				1,530			$	14,156

	Balance at December 31, 2011	$	(18,391	)		$	(17,814	)		$	7,086		$	(29,119	)

	Other comprehensive loss before reclassifications	(912		)		(9,637		)		(5,442		)	(15,991		)
	Amounts reclassified from accumulated other comprehensive income (loss)	1,865				10,811				1,785			14,461

	Balance at December 31, 2012	$	(17,438	)		$	(16,640	)		$	3,429		$	(30,649	)

	Other comprehensive (loss) income before reclassifications	(68		)		6,553				1,497			7,982

	Amounts reclassified from accumulated other comprehensive income (loss)	1,933				5,072				—			7,005

	Balance at December 31, 2013	$	(15,573	)		$	(5,015	)		$	4,926		$	(15,662	)

	___________________________

	-1	Amount reclassified from accumulated other comprehensive income (loss) is included in interest expense in the respective consolidated statements of income. As of December 31, 2013, 2012 and 2011, the deferred net losses from these terminated hedges, which is included in accumulated other comprehensive loss relating to net unrealized loss on derivative instrument, was approximately $14.2 million, $15.5 million and $16.7 million, respectively.

	-2	Amount reclassified from accumulated other comprehensive income (loss) is included in equity in net income from unconsolidated joint ventures in the respective consolidated statements of income.

Fair_Value_Measurements

Fair Value Measurements	12 Months Ended
	Dec. 31, 2013
Fair Value Disclosures [Abstract]	'
Fair Value Measurements	'
	Fair Value Measurements
	We are required to disclose the fair value information about our financial instruments, whether or not recognized in the consolidated balance sheets, for which it is practicable to estimate fair value. FASB guidance defines fair value as the price that would be received to sell an asset or paid to transfer a liability in an orderly transaction between market participants on the measurement date. We measure and/or disclose the estimated fair value of financial assets and liabilities based on a hierarchy that distinguishes between market participant assumptions based on market data obtained from sources independent of the reporting entity and the reporting entity’s own assumptions about market participant assumptions. This hierarchy consist of three broad levels: Level 1 - quoted prices (unadjusted) in active markets for identical assets or liabilities that the reporting entity can access at the measurement date; Level 2 - inputs other than quoted prices included within Level 1, that are observable for the asset or liability, either directly or indirectly; and Level 3 - unobservable inputs for the asset or liability that are used when little or no market data is available. We follow this hierarchy for our assets and liabilities measured at fair value on a recurring and nonrecurring basis. In instances in which the determination of the fair value measurement is based on inputs from different levels of the fair value hierarchy, the level in the fair value hierarchy within which the entire fair value measurement falls is based on the lowest level of input that is significant to the fair value measurement in its entirety. The Company’s assessment of the significance of the particular input to the fair value measurement in its entirety requires judgment and considers factors specific to the asset or liability.
	The following tables set forth the assets and liabilities that we measure at fair value on a recurring and non-recurring basis by their levels in the fair value hierarchy at December 31, 2013 and 2012, respectively (in thousands):


		December 31, 2013
		Total		Level 1		Level 2		Level 3
	Assets:
	Marketable securities	$	32,049	$	4,307	$	24,419	$	3,323

	Liabilities:
	Interest rate swap agreements (included in accrued interest payable and other liabilities)	$	1,329	—		$	1,329	—




		December 31, 2012
		Total		Level 1		Level 2		Level 3
	Assets:
	Marketable securities	$	21,429	$	2,202	$	15,575	$	3,652

	Liabilities:
	Interest rate swap agreements (included in accrued interest payable and other liabilities)	$	1,959	—		$	1,959	—


	We determine impairment in real estate investments and debt and preferred equity investments, including intangibles utilizing cash flow projections that apply estimated revenue and expense growth rates, discount rates and capitalization rates, which are classified as Level 3 inputs.
	The fair value of derivative instruments is based on current market data received from financial sources that trade such instruments and are based on prevailing market data and derived from third party proprietary models based on well-recognized financial principles and reasonable estimates about relevant future market conditions, which are classified as Level 2 inputs.
	The financial assets and liabilities that are not measured at fair value on our consolidated balance sheets include cash and cash equivalents, restricted cash, accounts receivable, accounts payable and accrued expenses, debt and preferred equity investments, and mortgages and other loans payable and other secured and unsecured debt. The carrying amount of cash and cash equivalents, restricted cash, accounts receivable, and accounts payable and accrued expenses reported in our consolidated balance sheets approximates fair value due to the short term nature of these instruments. The fair value of debt and preferred equity investments, which is classified as Level 3, is estimated by discounting the future cash flows using current interest rates at which similar loans with the same maturities would be made to borrowers with similar credit ratings. The fair value of borrowings, which is classified as Level 3, is estimated by discounting the contractual cash flows of each debt to their present value using adjusted market interest rates, which is provided by a third-party specialist.
	The following table provides the carrying value and fair value of these financial instruments as of December 31, 2013 and 2012 (in thousands):


		December 31, 2013				December 31, 2012
		Carrying Value		Fair Value		Carrying Value		Fair Value

	Debt and preferred equity investments	$	1,304,839	-1		$	1,348,434	-1


	Fixed rate debt	$	5,599,960	5,886,980		$	4,922,725	$	5,334,244

	Variable rate debt	1,319,948		1,327,422		1,597,695		1,557,494

		$	6,919,908	$	7,214,402	$	6,520,420	$	6,891,738

	_____________________________________

	-1	Debt and preferred equity investments had an estimated fair value ranging between $1.3 billion and $1.4 billion at both December 31, 2013 and 2012.
	Disclosure about fair value of financial instruments was based on pertinent information available to us as of December 31, 2013 and 2012. Although we are not aware of any factors that would significantly affect the reasonable fair value amounts, such amounts have not been comprehensively revalued for purposes of these financial statements since that date and current estimates of fair value may differ significantly from the amounts presented herein.

Financial_Instruments_Derivati

Financial Instruments: Derivatives and Hedging	12 Months Ended
	Dec. 31, 2013
Derivative Instruments and Hedging Activities Disclosure [Abstract]	'
Financial Instruments: Derivatives and Hedging	'
	Financial Instruments: Derivatives and Hedging
	In the normal course of business, we use a variety of commonly used derivative instruments, such as interest rate swaps, caps, collar and floors, to manage, or hedge interest rate risk. We hedge our exposure to variability in future cash flows for forecasted transactions in addition to anticipated future interest payments on existing debt.
	The following table summarizes the notional and fair value of our consolidated derivative financial instruments at December 31, 2013 based on Level 2 information pursuant to ASC 810-10. The notional value is an indication of the extent of our involvement in these instruments at that time, but does not represent exposure to credit, interest rate or market risks (amounts in thousands).


		Notional				Strike			Effective	Expiration		Balance Sheet Location	Fair
		Value				Rate			Date	Date			Value
	Interest Rate Cap	$	263,426			6	%		Nov-13	Nov-15		Other Assets	$	9

	Interest Rate Cap	137,500				4	%		Oct-13	Sep-15		Other Assets	7

	Interest Rate Swap	30,000				2.295	%		Jul-10	Jun-16		Other Liabilities	(1,293		)

	Interest Rate Swap	8,500				0.74	%		Feb-12	Feb-15		Other Liabilities	(45		)

													$	(1,322	)
	Certain interest rate caps are not designated as a hedging instruments and changes in the value are marked to market through earnings. During the year ended December 31, 2013, 2012 and 2011, we recorded a loss on the changes in the fair value of $16,000, $770,000 and $66,000, respectively, which is included in interest expense on the consolidated statements of income. Included in 2012 was approximately $0.7 million of change in fair value of a terminated currency hedge which was marked to market.
	Gains and losses on terminated hedges are included in the accumulated other comprehensive loss, and are recognized into earnings over the term of the related mortgage obligation. Over time, the realized and unrealized gains and losses held in accumulated other comprehensive loss will be reclassified into earnings as an adjustment to interest expense in the same periods in which the hedged interest payments affect earnings. We estimate that approximately $2.7 million of the current balance held in accumulated other comprehensive loss will be reclassified into interest expense and $5.0 million of the portion related to our share of joint venture accumulated other comprehensive loss will be reclassified into equity in net income from unconsolidated joint ventures within the next 12 months.
	The following table presents the effect of our derivative financial instruments and our share of our joint ventures' derivative financial instruments that are designated and qualify as hedging instruments on the consolidated statements of income for the years ended December 31, 2013, 2012 and 2011, respectively (in thousands):


			Amount of Gain or (Loss)										Location of Gain or (Loss) Reclassified from Accumulated Other Comprehensive Loss into Income		Amount of Loss						Location of Gain (Loss) Recognized in Income on Derivative	Amount of Gain or (Loss) or
			Recognized in												Reclassified from							Recognized
			Other Comprehensive												Accumulated Other							into Income
			Loss												Comprehensive Loss into Income							(Ineffective Portion)
			(Effective Portion)												(Effective Portion)
			Years Ended												Years Ended							Years Ended
			December 31,												December 31,							December 31,
	Derivative		2013				2012			2011					2013		2012		2011			2013		2012		2011
	Interest Rate Swaps/Caps		$	(68	)		(912		)	$	(5,699	)	Interest expense		$	1,933	1,865		$	1,554	Interest expense	$	3	3		$	(16	)

	Share of unconsolidated joint ventures' derivative instruments		6,553				(9,637		)	(10,273		)	Equity in net income from unconsolidated joint ventures		5,072		10,811		11,072		Equity in net income from unconsolidated joint ventures	—		—		—

			$	6,485			$	(10,549	)	$	(15,972	)			$	7,005	$	12,676	$	12,626		$	3	$	3	$	(16	)

Rental_Income

Rental Income	12 Months Ended
	Dec. 31, 2013
Leases [Abstract]	'
Rental Income	'
	Rental Income
	The Operating Partnership is the lessor and the sublessor to tenants under operating leases with expiration dates ranging from January 1, 2014 to 2044. The minimum rental amounts due under the leases are generally either subject to scheduled fixed increases or adjustments. The leases generally also require that the tenants reimburse us for increases in certain operating costs and real estate taxes above their base year costs. Approximate future minimum rents to be received over the next five years and thereafter for non-cancelable operating leases in effect at December 31, 2013 for the consolidated properties, including consolidated joint venture properties, and our share of unconsolidated joint venture properties are as follows (in thousands):


		Consolidated		Unconsolidated
		Properties		Properties
	2014	$	992,002	$	245,879

	2015	939,016		195,447

	2016	870,664		214,616

	2017	792,471		201,671

	2018	733,754		202,309

	Thereafter	3,785,428		1,911,877

		$	8,113,335	$	2,971,799

Benefit_Plans

Benefit Plans	12 Months Ended
	Dec. 31, 2013
Compensation and Retirement Disclosure [Abstract]	'
Benefit Plans	'
	Benefit Plans
	The building employees are covered by multi-employer defined benefit pension plans and post-retirement health and welfare plans. We participate in the Building Service 32BJ, or Union, Pension Plan and Health Plan. The Pension Plan is a multi-employer, non-contributory defined benefit pension plan that was established under the terms of collective bargaining agreements between the Service Employees International Union, Local 32BJ, the Realty Advisory Board on Labor Relations, Inc. and certain other employees. This Pension Plan is administered by a joint board of trustees consisting of union trustees and employer trustees and operates under employer identification number 13-1879376. The Pension Plan year runs from July 1 to June 30. Employers contribute to the Pension Plan at a fixed rate on behalf of each covered employee. Separate actuarial information regarding such pension plans is not made available to the contributing employers by the union administrators or trustees, since the plans do not maintain separate records for each reporting unit. However, on September 28, 2011, September 28, 2012 and September 28, 2013, the actuary certified that for the plan years beginning July 1, 2011, July 1, 2012 and July 2013, respectively, the Pension Plan was in critical status under the Pension Protection Act of 2006. The Pension Plan trustees adopted a rehabilitation plan consistent with this requirement. No surcharges have been paid to the Pension Plan as of December 31, 2013. For the years ended December 31, 2013, 2012 and 2011, the Pension Plan received contributions from employers totaling $221.9 million, $212.7 million and $201.3 million, respectively.
	The Health Plan was established under the terms of collective bargaining agreements between the Union, the Realty Advisory Board on Labor Relations, Inc. and certain other employers. The Health Plan provides health and other benefits to eligible participants employed in the building service industry who are covered under collective bargaining agreements, or other written agreements, with the Union. The Health Plan is administered by a Board of Trustees with equal representation by the employers and the Union and operates under employer identification number 13-2928869. The Health Plan receives contributions in accordance with collective bargaining agreements or participation agreements. Generally, these agreements provide that the employers contribute to the Health Plan at a fixed rate on behalf of each covered employee. Pursuant to the contribution diversion provision in the collective bargaining agreements, the collective bargaining parties agreed, beginning January 1, 2009, to divert to the Pension Plan $1.95 million of employer contributions per quarter that would have been due to the Health Plan. Effective October 1, 2010, the diversion of contributions was discontinued. For the years ended December 31, 2013, 2012 and 2011, the Health Plan received contributions from employers totaling $923.5 million, $893.3 million and $843.2 million, respectively.
	Contributions we made to the multi-employer plans for the years ended December 31, 2013, 2012 and 2011 are included in the table below (in thousands):


	Benefit Plan	2013		2012		2011
	Pension Plan	$	2,765	$	2,506	$	2,264

	Health Plan	8,522		8,020		6,919

	Other plans	6,006		6,025		5,111

	Total plan contributions	$	17,293	$	16,551	$	14,294

	401(K) Plan
	In August 1997, we implemented a 401(K) Savings/Retirement Plan, or the 401(K) Plan, to cover eligible employees of ours, and any designated affiliate. The 401(K) Plan permits eligible employees to defer up to 15% of their annual compensation, subject to certain limitations imposed by the Code. The employees' elective deferrals are immediately vested and non-forfeitable upon contribution to the 401(K) Plan. During 2000, we amended our 401(K) Plan to include a matching contribution, subject to ERISA limitations, equal to 50% of the first 4% of annual compensation deferred by an employee. During 2003, we amended our 401(K) Plan to provide for discretionary matching contributions only. For 2013, 2012 and 2011, a matching contribution equal to 50% of the first 6% of annual compensation was made. For the years ended December 31, 2013, 2012 and 2011, we made matching contributions of approximately $550,000, $561,000 and $502,000, respectively.

Commitments_and_Contingencies

Commitments and Contingencies	12 Months Ended
	Dec. 31, 2013
Commitments and Contingencies Disclosure [Abstract]	'
Commitments and Contingencies	'
	Commitments and Contingencies
	Legal Proceedings
	We and the Operating Partnership are not presently involved in any material litigation nor, to our knowledge, is any material litigation threatened against us or our properties, other than routine litigation arising in the ordinary course of business. Management believes the costs, if any, incurred by us related to this litigation will not materially affect our financial position, operating results or liquidity.
	Environmental Matters
	Our management believes that the properties are in compliance in all material respects with applicable Federal, state and local ordinances and regulations regarding environmental issues. Management is not aware of any environmental liability that it believes would have a materially adverse impact on our financial position, results of operations or cash flows. Management is unaware of any instances in which it would incur significant environmental cost if any of our properties were sold.
	Employment Agreements
	We have entered into employment agreements with certain executives, which expire between January 2015 and January 2018. The minimum cash-based compensation, including base salary and guaranteed bonus payments, associated with these employment agreements total approximately $4.7 million for 2014. In addition these employment agreements provide for deferred compensation awards based on our stock price and which were valued at approximately $1.2 million on the grant date. The value of these awards may change based on fluctuations in our stock price.
	Insurance
	We maintain "all-risk" property and rental value coverage (including coverage regarding the perils of flood, earthquake and terrorism) within two property insurance portfolios and liability insurance. As of December 31, 2013, the first property portfolio maintains a blanket limit of $950.0 million per occurrence, including terrorism, for the majority of the New York City properties in our portfolio. The second portfolio maintains a limit of $700.0 million per occurrence, including terrorism, for some New York City properties and the majority of the Suburban properties. Both policies expire on December 31, 2014. Each policy includes $100.0 million of flood coverage, with a lower sublimit for locations in high hazard flood zones. We maintain liability policies which cover all our properties and provide limits of $201.0 million per occurrence and in the aggregate per location. The liability policies expire on October 31, 2014. Additional coverage may be purchased on a stand-alone basis for certain assets.
	In October 2006, we formed a wholly-owned taxable REIT subsidiary, Belmont Insurance Company, or Belmont, to act as a captive insurance company and be one of the elements of our overall insurance program. Belmont is a subsidiary of ours. Belmont was formed in an effort to, among other reasons, stabilize to some extent the fluctuations of insurance market conditions. Belmont is licensed in New York to write Terrorism, NBCR (nuclear, biological, chemical, and radiological), General Liability, Environmental Liability and D&O coverage. Belmont has purchased reinsurance to reinsure the retained insurance risks not covered by other insurance.
	Belmont is a form of self-insurance. We are responsible for the liquidity and capital resources of Belmont and its accounts are included in our consolidated financial statements. All losses required to be paid by Belmont are recorded as losses by us.
	Belmont had loss reserves of approximately $7.0 million and $6.2 million as of December 31, 2013 and 2012, respectively.
	Capital and Ground Leases Arrangements
	In November 2013, we renewed and extended the maturity date of the ground lease at 420 Lexington Avenue from December 31, 2029 through December 31, 2050, with two options for further extension through December 2085. Ground lease rent payments will be $10.9 million annually through December 2019, $11.2 million annually through December 2029 and then beginning in January 2030 through the remaining lease term, a minimum annual rent of $12.3 million, subject to a one-time adjustment based on 6% of the fair value of the land.
	In October 2012, we, together with Stonehenge Partners, acquired a leasehold position at 1080 Amsterdam Avenue. The joint venture prepaid $13.0 million of ground lease rent, which will be applied against rental payments over the term of the lease. The lease will expire on July 31, 2111 or earlier in accordance with the terms of the lease agreement. Land was estimated to be approximately 40% of the fair market value of the property. The portion of the lease attributed to land was classified as an operating lease and the remainder as a capital lease which had a cost basis of $27.4 million at December 31, 2013.
	The property located at 711 Third Avenue operates under an operating sub-lease, which expires in 2083. Under the sub-lease, we were responsible for ground rent payments of $1.55 million annually through July 2011 on the 50% portion of the fee we do not own. The ground rent was reset in July 2011. Following the reset, we are responsible for ground rent payments of $5.25 million annually through July 2016 and then $5.5 million annually thereafter on the 50% portion of the fee we do not own.
	The property located at 461 Fifth Avenue operates under a ground lease (approximately $2.1 million annually) with a term expiration date of 2027 and with two options to renew for an additional 21 years each, followed by a third option for 15 years. We also have an option to purchase the ground lease for a fixed price on a specific date.
	The property located at 625 Madison Avenue operates under a ground lease (approximately $4.6 million annually) with a term expiration date of 2022 and with two options to renew for an additional 23 years.
	The property located at 1185 Avenue of the Americas operates under a ground lease (approximately $6.9 million annually) with a term expiration of 2020 and with an option to renew for an additional 23 years.
	In April 1988, the SL Green predecessor entered into a lease agreement for the property at 673 First Avenue, which has been capitalized for financial statement purposes. Land was estimated to be approximately 70% of the fair market value of the property. The portion of the lease attributed to land was classified as an operating lease and the remainder as a capital lease. The initial lease term was 49 years with an option for an additional 25 years. In November 2012, we extended the lease to August 2087, an additional 50 years past its scheduled 2037 expiration date, with an effective date of September 2012. We continue to lease the property located at 673 First Avenue, which has been classified as a capital lease with a cost basis of $22.9 million and cumulative amortization of $6.5 million and $6.3 million at December 31, 2013 and 2012, respectively.
	The following is a schedule of future minimum lease payments under capital leases and noncancellable operating leases with initial terms in excess of one year as of December 31, 2013 (in thousands):


	December 31,	Capital lease			Non-cancellable
					operating leases
	2014	$	2,292		$	35,356

	2015	2,363			35,511

	2016	2,531			35,943

	2017	2,652			36,176

	2018	2,652			36,176

	Thereafter	353,826			1,409,808

	Total minimum lease payments	366,316			$	1,588,970

	Less amount representing interest	(318,645		)
	Present value of net minimum lease payments	$	47,671

Segment_Information

Segment Information	12 Months Ended
	Dec. 31, 2013
Segment Reporting [Abstract]	'
Segment Information	'
	Segment Information
	We are a REIT primarily engaged in owning, managing, leasing, acquiring and repositioning commercial properties in the New York Metropolitan area and have two reportable segments, real estate and debt and preferred equity. We evaluate real estate performance and allocate resources based on earnings contribution to income from continuing operations.
	Our real estate portfolio is primarily located in the geographical markets of the New York Metropolitan area. The primary sources of revenue are generated from tenant rents and escalations and reimbursement revenue. Real estate property operating expenses consist primarily of security, maintenance, utility costs, real estate taxes and ground rent expense (at certain applicable properties). See Note 5, "Debt and Preferred Equity Investments," for additional details on our debt and preferred equity investments.
	Selected results of operations for the years ended December 31, 2013, 2012 and 2011, and selected asset information as of December 31, 2013 and 2012, regarding our operating segments are as follows (in thousands):


		Real			Debt and Preferred		Total
		Estate			Equity		Company
		Segment			Segment
	Total revenues
	Years ended:
	31-Dec-13	$	1,275,234		$	193,843	$	1,469,077

	31-Dec-12	1,263,574			119,155		1,382,729

	31-Dec-11	1,126,441			120,418		1,246,859

	Income from continuing operations before equity in net gain on sale of interest in unconsolidated joint venture/real estate and purchase price fair value adjustment
	Years ended:
	31-Dec-13	$	(27,024	)	$	160,386	$	133,362

	31-Dec-12	60,455			92,946		153,401

	31-Dec-11	20,327			101,037		121,364

	Total assets
	As of:
	31-Dec-13	$	13,641,727		$	1,317,274	$	14,959,001

	31-Dec-12	13,028,406			1,357,890		14,386,296

	Income from continuing operations represents total revenues less total expenses for the real estate segment and total investment income less allocated interest expense for the debt and preferred equity segment. Interest costs for the debt and preferred equity segment are imputed assuming 100% leverage at our 2012 revolving credit facility borrowing cost. We also allocate loan loss reserves, net of recoveries, to the debt and preferred equity segment. We do not allocate marketing, general and administrative expenses and transaction related costs (totaling approximately $90.2 million, $88.5 million and $85.7 million for the years ended December 31, 2013, 2012 and 2011, respectively) to the debt and preferred equity segment since we base performance on the individual segments prior to allocating marketing, general and administrative expenses. All other expenses, except interest, relate entirely to the real estate assets.
	There were no transactions between the above two segments.
	The table below reconciles income from continuing operations to net income for the years ended December 31, 2013, 2012 and 2011 (in thousands):


		Years ended December 31,
		2013			2012		2011
	Income from continuing operations before equity in net gain on sale of interest in unconsolidated joint venture/real estate and purchase price fair value adjustment	$	133,362		$	153,401	$	121,364

	Equity in net gain on sale of interest in unconsolidated joint venture/real estate	3,601			37,053		2,918

	Purchase price fair value adjustment	(2,305		)	—		498,195

	Income from continuing operations	134,658			190,454		622,477

	Net income from discontinued operations	1,725			12,619		8,560

	Gain on sale of discontinued operations	14,900			6,627		46,085

	Net income	$	151,283		$	209,700	$	677,122

Quarterly_Financial_Data_unaud

Quarterly Financial Data (unaudited)	12 Months Ended
	Dec. 31, 2013
SL Green Realty Corp	'
Condensed Income Statements, Captions [Line Items]	'
Quarterly Financial Data (unaudited)	'
	Quarterly Financial Data of the Company (unaudited)
	Summarized quarterly financial data for the years ended December 31, 2013 and 2012, which is reflective of the reclassification of the properties sold or held during 2013 and 2012 as discontinued operations (see Note 4, "Property Dispositions"), was as follows (in thousands, except for per share amounts):


	2013 Quarter Ended	December 31			September 30			June 30			March 31
	Total revenues	$	374,699		$	363,765		$	365,145		$	365,468

	Income from continuing before equity in net gain (loss) on sale of interest in unconsolidated joint venture/real estate, purchase price fair value adjustment, gain (loss) on early extinguishment of debt, loss on sale of investment in marketable securities, net of noncontrolling interests	$	33,314		$	25,924		$	34,019		$	42,776

	Equity in net gain (loss) on sale of interest in unconsolidated joint venture/real estate	7,538			(354		)	(3,583		)	—

	Purchase price fair value adjustment	—			—			(2,305		)	—

	Gain (loss) on early extinguishment of debt	5			—			(10		)	(18,513		)

	Loss on sale of investment in marketable securities	—			—			(8		)	(57		)

	Net income (loss) from discontinued operations	—			1,406			(678		)	997

	Gain on sale of discontinued operations	—			13,787			—			1,113

	Net income attributable to SL Green	40,857			40,763			27,435			26,316

	Preferred stock redemption costs	—			—			(12,160		)	—

	Perpetual preferred stock dividends	(3,737		)	(3,738		)	(6,999		)	(7,407		)
	Net income attributable to SL Green common stockholders	$	37,120		$	37,025		$	8,276		$	18,909

	Net income attributable to common stockholders per common share—basic	$	0.39		$	0.4		$	0.09		$	0.21

	Net income attributable to common stockholders per common share—diluted	$	0.39		$	0.4		$	0.09		$	0.21



	2012 Quarter Ended	December 31			September 30			June 30			March 31
	Total revenues	$	346,599		$	357,011		$	344,535		$	334,585

	Income from continuing before equity in net gain (loss) on sale of interest in unconsolidated joint venture/real estate, loss on early extinguishment of debt, gain on sale of investment in marketable securities, net of noncontrolling interests	$	2,624		$	27,276		$	94,362		$	17,882

	Equity in net gain (loss) on sale of interest in unconsolidated joint venture/ real estate	19,277			(4,807		)	15,323			7,260

	Loss on early extinguishment of debt	(6,978		)	—			—			—

	Gain on sale of investment in marketable securities	2,703			2,237			—			—

	Net income from discontinued operations	9,737			951			899			1,032

	Gain on sale of discontinued operations	—			—			—			6,627

	Net income attributable to SL Green	27,363			25,657			110,584			32,801

	Preferred stock redemption costs	—			(10,010		)	—			—

	Perpetual preferred stock dividends	(7,407		)	(7,915		)	(7,544		)	(7,545		)
	Net income attributable to SL Green common stockholders	$	19,956		$	7,732		$	103,040		$	25,256

	Net income attributable to common stockholders per common share—basic	$	0.22		$	0.09		$	1.15		$	0.29

	Net income attributable to common stockholders per common share—diluted	$	0.22		$	0.09		$	1.14		$	0.29

SL Green Operating Partnership	'
Condensed Income Statements, Captions [Line Items]	'
Quarterly Financial Data (unaudited)	'
	Quarterly Financial Data of the Operating Partnership (unaudited)
	Summarized quarterly financial data for the years ended December 31, 2013 and 2012, which is reflective of the reclassification of the properties sold or held during 2013 and 2012 as discontinued operations (see Note 4, "Property Dispositions"), was as follows (in thousands, except for per share amounts):


	2013 Quarter Ended	December 31			September 30			June 30			March 31
	Total revenues	$	374,699		$	363,765		$	365,145		$	365,468

	Income from continuing before equity in net gain (loss) on sale of interest in unconsolidated joint venture/real estate, purchase price fair value adjustment, gain (loss) on early extinguishment of debt, loss on sale of investment in marketable securities, net of noncontrolling interests	$	34,428		$	27,034		$	34,263		$	43,331

	Equity in net (loss) gain on sale of interest in unconsolidated joint venture/ real estate	7,538			(354		)	(3,583		)	—

	Purchase price fair value adjustment	—			—			(2,305		)	—

	Gain (loss) on early extinguishment of debt	5			—			(10		)	(18,513		)

	Loss on sale of investment in marketable securities	—			—			(8		)	(57		)

	Net income (loss) from discontinued operations	—			1,406			(678		)	997

	Gain on sale of discontinued operations	—			13,787			—			1,113

	Net income attributable to SLGOP	41,971			41,873			27,679			26,871

	Preferred unit redemption costs	—			—			(12,160		)	—

	Perpetual preferred units distributions	(3,737		)	(3,738		)	(6,999		)	(7,407		)
	Net income attributable to SLGOP common unitholders	$	38,234		$	38,135		$	8,520		$	19,464

	Net income attributable to common unitholders per common unit—basic	$	0.39		$	0.4		$	0.09		$	0.21

	Net income attributable to common unitholders per common unit—diluted	$	0.39		$	0.4		$	0.09		$	0.21



	2012 Quarter Ended	December 31			September 30			June 30			March 31
	Total revenues	$	346,598		$	357,011		$	344,535		$	334,585

	Income from continuing before equity in net gain (loss) on sale of interest in unconsolidated joint venture/real estate, loss on early extinguishment of debt, gain on sale of investment in marketable securities, net of noncontrolling interests	$	3,345		$	27,843		$	97,783		$	18,770

	Equity in net gain (loss) on sale of interest in unconsolidated joint venture/ real estate	19,277			(4,807		)	15,323			7,260

	Loss on early extinguishment of debt	(6,978		)	—			—			—

	Gain on sale of investment in marketable securities	2,703			2,237			—			—

	Net income from discontinued operations	9,737			951			899			1,032

	Gain on sale of discontinued operations	—			—			—			6,627

	Net income attributable to SLGOP	28,084			26,224			114,005			33,689

	Preferred unit redemption costs	—			(10,010		)	—			—

	Perpetual preferred distributions	(7,407		)	(7,915		)	(7,544		)	(7,545		)
	Net income attributable to SLGOP common unitholders	$	20,677		$	8,299		$	106,461		$	26,144

	Net income attributable to common unitholders per common unit—basic	$	0.22		$	0.09		$	1.15		$	0.29

	Net income attributable to common unitholders per common unit—diluted	$	0.22		$	0.09		$	1.14		$	0.29

Subsequent_Events

Subsequent Events	12 Months Ended
Subsequent Events	Dec. 31, 2013
Subsequent Events [Abstract]	'
Subsequent Events	'
	Subsequent Events
	In January 2014, we sold our 50.0% interest in the joint venture which holds 21-25 West 34th Street at an implied gross valuation of $114.9 million, inclusive of the $100.0 million mortgage encumbering the property.

Schedule_IIValuation_and_Quali

Schedule II-Valuation and Qualifying Accounts	12 Months Ended
	Dec. 31, 2013
Valuation and Qualifying Accounts [Abstract]	'
Schedule II-Valuation and Qualifying Accounts	'
	Schedule II—Valuation and Qualifying Accounts
	December 31, 2013
	(in thousands)




	Column A	Column B		Column C	Column D		Column E
	Description	Balance at		Additions	Uncollectible		Balance at
		Beginning of		Charged Against	Accounts		End of Year
		Year		Operations	Written-off/Recovery
	Year Ended December 31, 2013
	Tenant and other receivables—allowance	$	14,341	3,052	(68	)	$	17,325

	Deferred rent receivable—allowance	$	29,580	3,133	(2,380	)	$	30,333

	Year Ended December 31, 2012
	Tenant and other receivables—allowance	$	11,326	10,147	(7,132	)	$	14,341

	Deferred rent receivable—allowance	$	29,156	3,193	(2,769	)	$	29,580

	Year Ended December 31, 2011
	Tenant receivables—allowance	$	10,198	4,537	(3,409	)	$	11,326

	Deferred rent receivable—allowance	$	30,834	6,638	(8,316	)	$	29,156

Schedule_IIIReal_Estate_And_Ac

Schedule III-Real Estate And Accumulated Depreciation	12 Months Ended
	Dec. 31, 2013
SEC Schedule III, Real Estate and Accumulated Depreciation Disclosure [Abstract]	'
Schedule III-Real Estate And Accumulated Depreciation	'
	SL Green Realty Corp. and SL Green Operating Partnership, L.P.
	Schedule III—Real Estate And Accumulated Depreciation
	December 31, 2013
	(Dollars in thousands)



	Column A		Column B				Column C							Column D Cost						Column E Gross Amount at Which									Column F			Column G		Column H		Column I
							Initial Cost							Capitalized						Carried at Close of Period
														Subsequent To
														Acquisition
	Description		Encumbrances				Land				Building &			Land			Building &			Land			Building &			Total			Accumulated Depreciation			Date of		Date		Life on
											Improvements						Improvements						Improvements									Construction		Acquired		Which
																																				Depreciation is
																																				Computed
	673 First Ave(1)		$	—			$	—			$	35,727		$	—		$	23,464		$	—		$	59,191		$	59,191		$	20,019		1928		Aug-97		Various

	420 Lexington Ave(1)		182,641				—				107,832			—			169,790			—			277,622			277,622			91,253			1927		Mar-98		Various

	711 Third Avenue(1)		120,000				19,844				42,499			—			35,029			19,844			77,528			97,372			29,359			1955		May-98		Various

	555 W. 57th Street(1)		—				18,846				78,704			—			43,084			18,846			121,788			140,634			44,318			1971		Jan-99		Various

	317 Madison Ave(1)		—				21,205				85,559			—			28,821			21,205			114,380			135,585			49,963			1920		Jun-01		Various

	220 East 42nd Street(1)		275,000				50,373				203,727			635			52,189			51,008			255,916			306,924			72,157			1929		Feb-03		Various

	461 Fifth Avenue(1)		—				—				62,695			—			8,003			—			70,698			70,698			19,807			1988		Oct-03		Various

	750 Third Avenue(1)		—				51,093				205,972			—			33,895			51,093			239,867			290,960			62,379			1958		Jul-04		Various

	625 Madison Ave(1)		120,830				—				246,673			—			33,212			—			279,885			279,885			69,230			1956		Oct-04		Various

	485 Lexington Avenue(1)		450,000				77,517				326,825			765			87,964			78,282			414,789			493,071			112,976			1956		Dec-04		Various

	609 Fifth Avenue(1)		—				36,677				145,954			—			7,230			36,677			153,184			189,861			28,481			1925		Jun-06		Various

	120 West 45th Street(1)		170,000				60,766				250,922			—			18,090			60,766			269,012			329,778			49,892			1998		Jan-07		Various

	810 Seventh Avenue(1)		—				114,077				476,386			—			44,614			114,077			521,000			635,077			98,988			1970		Jan-07		Various

	919 Third Avenue(1)(2)		500,000				223,529				1,033,198			35,410			16,799			258,939			1,049,997			1,308,936			188,175			1970		Jan-07		Various

	1185 Avenue of the Americas(1)		—				—				728,213			—			32,402			—			760,615			760,615			152,278			1969		Jan-07		Various

	1350 Avenue of the Americas(1)		—				91,038				380,744			—			26,376			91,038			407,120			498,158			78,379			1966		Jan-07		Various

	1100 King Street—		—				49,392				104,376			2,473			16,810			51,865			121,186			173,051			26,659			1983/1986		Jan-07		Various
	1-7 International Drive(3)
	520 White Plains Road(3)		—				6,324				26,096			—			4,352			6,324			30,448			36,772			6,573			1979		Jan-07		Various

	115-117 Stevens Avenue(3)		—				5,933				23,826			—			5,891			5,933			29,717			35,650			6,825			1984		Jan-07		Various

	100 Summit Lake Drive(3)		—				10,526				43,109			—			7,036			10,526			50,145			60,671			10,089			1988		Jan-07		Various

	200 Summit Lake Drive(3)		—				11,183				47,906			—			6,222			11,183			54,128			65,311			10,388			1990		Jan-07		Various

	500 Summit Lake Drive(3)		—				9,777				39,048			—			5,508			9,777			44,556			54,333			8,023			1986		Jan-07		Various

	140 Grand Street(3)		—				6,865				28,264			—			4,048			6,865			32,312			39,177			6,608			1991		Jan-07		Various

	360 Hamilton Avenue(3)		—				29,497				118,250			—			11,545			29,497			129,795			159,292			25,138			2000		Jan-07		Various

1-6 Landmark Square(4)		82,909				50,947				195,167			—			23,919			50,947			219,086			270,033			41,223			1973-1984		Jan-07		Various

7 Landmark Square(4)		—				2,088				7,748			(367		)	(134		)	1,721			7,614			9,335			403			2007		Jan-07		Various

680 Washington Boulevard(2)(4)		—				11,696				45,364			—			4,218			11,696			49,582			61,278			9,539			1989		Jan-07		Various

750 Washington Boulevard(2)(4)		—				16,916				68,849			—			4,854			16,916			73,703			90,619			14,140			1989		Jan-07		Various

1010 Washington Boulevard(4)		—				7,747				30,423			—			3,667			7,747			34,090			41,837			6,507			1988		Jan-07		Various

500 West Putnam Avenue(4)		23,529				11,210				44,782			—			4,594			11,210			49,376			60,586			8,837			1973		Jan-07		Various

150 Grand Street(3)		—				1,371				5,446			—			10,485			1,371			15,931			17,302			1,137			1962		Jan-07		Various

400 Summit Lake Drive(3)		—				38,889				—			285			1			39,174			1			39,175			1			---		Jan-07		Various

331 Madison Avenue(1)		—				14,763				65,241			—			902			14,763			66,143			80,906			12,419			1923		Apr-07		Various

1055 Washington Boulevard(4)		—				13,516				53,228			—			3,118			13,516			56,346			69,862			10,700			1987		Jun-07		Various

1 Madison Avenue(1)		587,336				172,641				654,394			905			14,384			173,546			668,778			842,324			107,764			1960		Aug-07		Various

125 Chubb Way(5)		—				5,884				25,958			—			23,478			5,884			49,436			55,320			3,372			2008		Jan-08		Various



100 Church Street(1)		230,000				32,494				79,996			2,500			81,109			34,994			161,105			196,099			21,198			1959		Jan-10		Various

125 Park Avenue(1)		146,250				120,900				189,714			—			29,893			120,900			219,607			340,507			26,598			1923		Oct-10		Various

2 Herald Square(1)		191,250				92,655				—			100,633			—			193,288			—			193,288			—			---		Dec-10		Various

885 Third Avenue(1)		267,650				131,766				—			110,771			—			242,537			—			242,537			—			---		Dec-10		Various

Williamsburg(6)		—				3,677				14,708			2,523			(4,550		)	6,200			10,158			16,358			821			2010		Dec-10		Various

1515 Broadway(1)		900,000				462,700				707,938			1,145			27,119			463,845			735,057			1,198,902			63,103			1972		Apr-11		Various

110 East 42nd Street(1)		—				34,000				46,411			2,354			13,490			36,354			59,901			96,255			6,371			1921		May-11		Various

180 Maiden Lane(1)(7)		262,706				191,523				233,230			—			4,871			191,523			238,101			429,624			18,599			1984		Nov-11		Various

51 East 42nd Street(1)		—				44,095				33,470			5			2,255			44,100			35,725			79,825			2,440			1913		Nov-11		Various

400 East 57th Street(1)(8)		70,000				39,780				69,895			—			6,027			39,780			75,922			115,702			3,571			1931		Jan-12		Various

400 East 58th Street(1)(8)		30,000				17,549				30,916			—			2,388			17,549			33,304			50,853			1,552			1929		Jan-12		Various

752 Madison Avenue(1)(8)		—				—				7,131			—			10			—			7,141			7,141			423			1996/2012		Jan-12		Various

762 Madison Avenue(1)(8)		8,211				6,153				10,461			—			89			6,153			10,550			16,703			524			1910		Jan-12		Various

19-21 East 65th Street(1)(8)		—				—				7,389			—			151			—			7,540			7,540			365			1928-1940		Jan-12		Various

304 Park Avenue(1)		—				54,189				75,619			300			4,198			54,489			79,817			134,306			4,726			1930		Jun-12		Various

635 Sixth Avenue(1)		—				24,180				37,158			163			18,071			24,343			55,229			79,572			—			1902		Sep-12		Various

641 Sixth Avenue(1)		—				45,668				67,316			308			768			45,976			68,084			114,060			2,922			1902		Sep-12		Various

1080 Amsterdam(1)(9)		—				—				27,445			—			8,450			—			35,895			35,895			—			1932		Oct-12		Various

131-137 Spring Street(1)		—				27,021				105,342			154			637			27,175			105,979			133,154			2,826			1891		Dec-12		Various

985-987 Third Avenue(1)		—				5,400				12,600			3,635			248			9,035			12,848			21,883			—			1900/1972		Dec-12		Various

248-252 Bedford Avenue(6)(10)		22,000				10,865				44,035			—			2,106			10,865			46,141			57,006			490			2012		Mar-13		Various

16 Court Street(6)		79,243				19,217				63,210			—			2,207			19,217			65,417			84,634			1,736			1927-1928		Apr-13		Various

315 West 33rd Street (1)		—				116,033				270,742			—			—			116,033			270,742			386,775			921			2000-2001		Nov-13		Various

Fifth Avenue Retail Assemblage(1)		—				43,800				102,200			—			—			43,800			102,200			146,000			284			1909/1920/1921		Nov-13		Various

Other(11)		—				1,130				—			1,004			9,826			2,134			9,826			11,960			2,771

Total		$	4,719,555			$	2,766,925			$	8,276,031		$	265,601		$	1,025,223		$	3,032,526		$	9,301,254		$	12,333,780		$	1,646,240

______________________________________________________________________

-1	Property located in New York, New York.

-2	We own a 51% interest in this property.

-3	Property located in Westchester County, New York.

-4	Property located in Connecticut.

-5	Property located in New Jersey.

-6	Property located in Brooklyn, New York.

-7	We own a 49.9% interest in this property.

-8	We own a 80.0% interest in this property.

-9	We own a 87.5% interest in this property.

-10	We own a 90.0% interest in this property.

-11	Other includes tenant improvements at eEmerge, capitalized interest and corporate improvements.
Schedule III—Real Estate And Accumulated Depreciation
December 31, 2013

The changes in real estate for the years ended December 31, 2013, 2012 and 2011 are as follows (in thousands):


	2013				2012				2011
Balance at beginning of year	$	11,662,953			$	11,147,151			$	8,890,064

Property acquisitions	702,717				649,445				2,276,308

Improvements	199,141				146,410				162,875

Retirements/disposals/deconsolidation	(231,031		)		(280,053		)		(182,096		)
Balance at end of year	$	12,333,780			$	11,662,953			$	11,147,151

The aggregate cost of land, buildings and improvements, before depreciation, for Federal income tax purposes at December 31, 2013 was approximately $8.6 billion.
The changes in accumulated depreciation, exclusive of amounts relating to equipment, autos, and furniture and fixtures, for the years ended December 31, 2013, 2012 and 2011 are as follows (in thousands):


	2013				2012				2011
Balance at beginning of year	$	1,393,323			$	1,136,603			$	916,293

Depreciation for year	286,776				288,560				245,421

Retirements/disposals/deconsolidation	(33,859		)		(31,840		)		(25,111		)
Balance at end of year	$	1,646,240			$	1,393,323			$	1,136,603

Significant_Accounting_Policie1

Significant Accounting Policies (Policies)	12 Months Ended
	Dec. 31, 2013
Accounting Policies [Abstract]	'
Principles of Consolidation	'
	Principles of Consolidation
	The consolidated financial statements include our accounts and those of our subsidiaries, which are wholly-owned or controlled by us. Entities which we do not control through our voting interest and entities which are variable interest entities, but where we are not the primary beneficiary, are accounted for under the equity method or as debt and preferred equity investments. See Note 5, "Debt and Preferred Equity Investments" and Note 6, "Investments in Unconsolidated Joint Ventures." All significant intercompany balances and transactions have been eliminated.
	We consolidate a variable interest entity, or VIE, in which we are considered a primary beneficiary. The primary beneficiary is the entity that has (i) the power to direct the activities that most significantly impact the entity's economic performance and (ii) the obligation to absorb losses of the VIE or the right to receive benefits from the VIE that could be significant to the VIE. Included in commercial real estate properties on our consolidated balance sheets for the years ended December 31, 2013 and 2012 are approximately $605.9 million and $607.4 million, respectively, related to our consolidated VIEs. Included in mortgages and other loans payable on our consolidated balance sheets for the years ended December 31, 2013 and 2012 are approximately $370.9 million and $379.6 million, respectively, related to our consolidated VIEs.
	A noncontrolling interest in a consolidated subsidiary is defined as the portion of the equity (net assets) in a subsidiary not attributable, directly or indirectly, to a parent. Noncontrolling interests are required to be presented as a separate component of equity in the consolidated balance sheet and the presentation of net income was modified to require earnings and other comprehensive income to be attributed to controlling and noncontrolling interests.
	We assess the accounting treatment for each joint venture and debt and preferred equity investment. This assessment includes a review of each joint venture or limited liability company agreement to determine which party has what rights and whether those rights are protective or participating. For all VIE's, we review such agreements in order to determine which party has the power to direct the activities that most significantly impact the entity's economic performance. In situations where we or our partner approves, among other things, the annual budget, receives a detailed monthly reporting package from us, meets on a quarterly basis to review the results of the joint venture, reviews and approves the joint venture's tax return before filing, and approves all leases that cover more than a nominal amount of space relative to the total rentable space at each property, we do not consolidate the joint venture as we consider these to be substantive participation rights that result in shared power of the activities that most significantly impact the performance of our joint venture. Our joint venture agreements typically contain certain protective rights such as the requirement of partner approval to sell, finance or refinance the property and the payment of capital expenditures and operating expenditures outside of the approved budget or operating plan.
Investment in Commercial Real Estate Properties	'
	Investment in Commercial Real Estate Properties
	Real estate properties are presented at cost less accumulated depreciation and amortization. Costs directly related to the development or redevelopment of properties are capitalized. Ordinary repairs and maintenance are expensed as incurred; major replacements and betterments, which improve or extend the life of the asset, are capitalized and depreciated over their estimated useful lives.
	A property to be disposed of is reported at the lower of its carrying value or its estimated fair value, less its cost to sell. Once an asset is held for sale, depreciation expense is no longer recorded and the historic results are reclassified as discontinued operations. See Note 4, "Property Dispositions."
	Properties are depreciated using the straight-line method over the estimated useful lives of the assets. The estimated useful lives are as follows:


	Category	Term
	Building (fee ownership)	40 years
	Building improvements	shorter of remaining life of the building or useful life
	Building (leasehold interest)	lesser of 40 years or remaining term of the lease
	Property under capital lease	remaining lease term
	Furniture and fixtures	four to seven years
	Tenant improvements	shorter of remaining term of the lease or useful life
	Depreciation expense (including amortization of the capital lease asset) amounted to approximately $309.4 million, $301.0 million and $249.0 million for the years ended December 31, 2013, 2012 and 2011, respectively.
	On a periodic basis, we assess whether there are any indications that the value of our real estate properties may be impaired or that their carrying value may not be recoverable. A property's value is considered impaired if management's estimate of the aggregate future cash flows (undiscounted and without interest charges for consolidated properties) to be generated by the property is less than the carrying value of the property. To the extent impairment has occurred, the loss will be measured as the excess of the carrying amount of the property over the calculated fair value of the property. We do not believe that the values of any of our consolidated properties were impaired at December 31, 2013.
	We also evaluate our real estate properties for potential impairment when a real estate property has been classified as held for sale. Real estate assets held for sale are valued at the lower of their carrying value or fair value less costs to sell. In June 2013, we recorded a $2.2 million impairment charge in connection with the sale of 300 Main Street in Stamford, Connecticut.
	A variety of costs are incurred in the development and leasing of our properties. After determination is made to capitalize a cost, it is allocated to the specific component of a project that is benefited. Determination of when a development project is substantially complete and capitalization must cease involves a degree of judgment. The costs of land and building under development include specifically identifiable costs. The capitalized costs include, but are not limited to, pre-construction costs essential to the development of the property, development costs, construction costs, interest costs, real estate taxes, salaries and related costs and other costs incurred during the period of development. We consider a construction project as substantially completed and held available for occupancy upon the completion of tenant improvements, but no later than one year from cessation of major construction activity. We cease capitalization on the portions substantially completed and occupied or held available for occupancy, and capitalize only those costs associated with the portions under construction.
	Results of operations of properties acquired are included in the consolidated statements of income from the date of acquisition.
	We recognize the assets acquired, liabilities assumed (including contingencies) and any noncontrolling interests in an acquired entity at their fair values on the acquisition date. We expense acquisition-related transaction costs as incurred, which are included in transaction related costs on our consolidated statements of income.
	When we acquire our partner's equity interest in an existing unconsolidated joint venture and gain control over the investment, we record the consolidated investment at fair value. The difference between the book value of our equity investment on the purchase date and our share of the fair value of the investment's purchase price is recorded as a purchase price fair value adjustment in our consolidated statements of income. In April 2013, we recognized a purchase price fair value adjustment of $(2.3) million in connection with the consolidation of 16 Court Street, which was previously accounted for as an investment in unconsolidated joint venture.
	We allocate the purchase price of real estate to land and building (inclusive of tenant improvements) and, if determined to be material, intangibles, such as the value of above- and below-market leases and origination costs associated with the in-place leases. We depreciate the amount allocated to building (inclusive of tenant improvements) and other intangible assets over their estimated useful lives, which generally range from three to 40 years and from one to 14 years, respectively. The values of the above- and below-market leases are amortized and recorded as either an increase (in the case of below-market leases) or a decrease (in the case of above-market leases) to rental income over the remaining term of the associated lease, which generally range from one to 14 years. The value associated with in-place leases is amortized over the expected term of the associated lease, which generally ranges from one to 14 years. If a tenant vacates its space prior to the contractual termination of the lease and no rental payments are being made on the lease, any unamortized balance of the related intangible will be written off. The tenant improvements and origination costs are amortized as an expense over the remaining life of the lease (or charged against earnings if the lease is terminated prior to its contractual expiration date). We assess fair value of the leases based on estimated cash flow projections that utilize appropriate discount and capitalization rates and available market information. Estimates of future cash flows are based on a number of factors including the historical operating results, known trends, and market/economic conditions that may affect the property. To the extent acquired leases contain fixed rate renewal options that are below market and determined to be material, we amortize such below market lease value into rental income over the renewal period.
Cash and Cash Equivalents	'
	Cash and Cash Equivalents
	We consider all highly liquid investments with maturity of three months or less when purchased to be cash equivalents.
Fair Value Measurements	'
	Fair Value Measurements
	Refer to Note 17, "Fair Value Measurements," in the accompanying notes to consolidated financial statements.
Investment in Marketable Securities	'
	Investment in Marketable Securities
	We invest in marketable securities. At the time of purchase, we are required to designate a security as held-to-maturity, available-for-sale, or trading depending on ability and intent. We do not have any securities designated as held-to-maturity or trading at this time. Securities available-for-sale are reported at fair value pursuant to ASC 820-10, with the net unrealized gains or losses reported as a component of accumulated other comprehensive loss. Unrealized losses that are determined to be other-than-temporary are recognized in earnings up to their credit component.
	The cost of bonds and marketable securities sold was determined using the specific identification method.
Investment in Unconsolidated Joint Ventures	'
	Investments in Unconsolidated Joint Ventures
	We account for our investments in unconsolidated joint ventures under the equity method of accounting in cases where we exercise significant influence over, but do not control, these entities and are not considered to be the primary beneficiary. We consolidate those joint ventures that we control or which are VIEs and where we are considered to be the primary beneficiary. In all these joint ventures, the rights of the joint venture partner are both protective as well as participating. Unless we are determined to be the primary beneficiary in a VIE, these participating rights preclude us from consolidating these non-VIE entities. These investments are recorded initially at cost, as investments in unconsolidated joint ventures, and subsequently adjusted for equity in net income (loss) and cash contributions and distributions. Equity income (loss) from unconsolidated joint ventures is allocated based on our ownership or economic interest in each joint venture. When a capital event (as defined in each joint venture agreement) such as a refinancing occurs, if return thresholds are met, future equity income will be allocated at our increased economic interest. We recognize incentive income from unconsolidated real estate joint ventures as income to the extent it is earned and not subject to a clawback feature. Distributions we receive from unconsolidated real estate joint ventures in excess of our basis in the investment are recorded as offsets to our investment balance if we remain liable for future obligations of the joint venture or may otherwise be committed to provide future additional financial support. None of the joint venture debt is recourse to us, except for $218.4 million which we guarantee at two joint ventures and performance guarantees under master leases at two other joint ventures. See Note 6, "Investments in Unconsolidated Joint Ventures."
	We assess our investments in unconsolidated joint ventures for recoverability, and if it is determined that a loss in value of the investment is other than temporary, we write down the investment to its fair value. We evaluate our equity investments for impairment based on the joint venture's projected discounted cash flows.
Restricted Cash	'
	Restricted Cash
	Restricted cash primarily consists of security deposits held on behalf of our tenants, interest reserves, as well as capital improvement and real estate tax escrows required under certain loan agreements.
Deferred Lease Costs	'
	Deferred Lease Costs
	Deferred lease costs consist of fees and direct costs incurred to initiate and renew operating leases and are amortized on a straight-line basis over the related lease term. Certain of our employees provide leasing services to the wholly-owned properties. Approximately $12.4 million, $11.0 million and $9.6 million of their compensation for the years ended December 31, 2013, 2012 and 2011, respectively, was capitalized and is amortized over an estimated average lease term of seven years.
Deferred Financing Costs	'
	Deferred Financing Costs
	Deferred financing costs represent commitment fees, legal, title and other third party costs associated with obtaining commitments for financing which result in a closing of such financing. These costs are amortized over the terms of the respective agreements. Unamortized deferred financing costs are expensed when the associated debt is refinanced or repaid before maturity. Costs incurred in seeking financing transactions, which do not close, are expensed in the period in which it is determined that the financing will not close.
Revenue Recognition	'
	Revenue Recognition
	Rental revenue is recognized on a straight-line basis over the term of the lease. Rental revenue recognition commences when the tenant takes possession or controls the physical use of the leased space. In order for the tenant to take possession, the leased space must be substantially ready for its intended use. To determine whether the leased space is substantially ready for its intended use, management evaluates whether we are or the tenant is the owner of tenant improvements for accounting purposes. When management concludes that we are the owner of tenant improvements, rental revenue recognition begins when the tenant takes possession of the finished space, which is when such tenant improvements are substantially complete. In certain instances, when management concludes that we are not the owner (the tenant is the owner) of tenant improvements, rental revenue recognition begins when the tenant takes possession of or controls the space. When management concludes that we are the owner of tenant improvements for accounting purposes, we record amounts funded to construct the tenant improvements as a capital asset. For these tenant improvements, we record amounts reimbursed by tenants as a reduction of the capital asset. When management concludes that the tenant is the owner of tenant improvements for accounting purposes, we record our contribution towards those improvements as a lease incentive, which is included in deferred leasing costs on our consolidated balance sheets and amortized as a reduction to rental revenue on a straight-line basis over the term of the lease. The excess of rents recognized over amounts contractually due pursuant to the underlying leases are included in deferred rents receivable on the consolidated balance sheets. We establish, on a current basis, an allowance for future potential tenant credit losses, which may occur against this account. The balance reflected on the consolidated balance sheet is net of such allowance.
	In addition to base rent, our tenants also generally will pay their pro rata share of increases in real estate taxes and operating expenses for the building over a base year. In some leases, in lieu of paying additional rent based upon increases in building operating expenses, the tenant will pay additional rent based upon increases in the wage rate paid to porters over the porters' wage rate in effect during a base year or increases in the consumer price index over the index value in effect during a base year. In addition, many of our leases contain fixed percentage increases over the base rent to cover escalations. Electricity is most often supplied by the landlord either on a sub-metered basis, or rent inclusion basis (i.e., a fixed fee is included in the rent for electricity, which amount may increase based upon increases in electricity rates or increases in electrical usage by the tenant). Base building services other than electricity (such as heat, air conditioning and freight elevator service during business hours, and base building cleaning) are typically provided at no additional cost, with the tenant paying additional rent only for services which exceed base building services or for services which are provided outside normal business hours. These escalations are based on actual expenses incurred in the prior calendar year. If the expenses in the current year are different from those in the prior year, then during the current year, the escalations will be adjusted to reflect the actual expenses for the current year.
	We record a gain on sale of real estate when title is conveyed to the buyer, subject to the buyer's financial commitment being sufficient to provide economic substance to the sale and we have no substantial economic involvement with the buyer.
	Interest income on debt and preferred equity investments is recognized over the life of the investment using the effective interest method and recognized on the accrual basis. Fees received in connection with loan commitments are deferred until the loan is funded and are then recognized over the term of the loan as an adjustment to yield. Anticipated exit fees, whose collection is expected, are also recognized over the term of the loan as an adjustment to yield. Fees on commitments that expire unused are recognized at expiration.
	Income recognition is generally suspended for debt and preferred equity investments at the earlier of the date at which payments become 90 days past due or when, in the opinion of management, a full recovery of interest income becomes doubtful. Interest income recognition is resumed when the loan becomes contractually current and performance is demonstrated to be resumed. Interest is recorded as income on impaired loans only to the extent cash is received. Several of the debt and preferred equity investments provide for accrual of interest at specified rates, which differ from current payment terms. Interest is recognized on such loans at the accrual rate subject to management's determination that accrued interest are ultimately collectible, based on the underlying collateral and operations of the borrower. If management cannot make this determination, interest income above the current pay rate is recognized only upon actual receipt.
	If we purchase a debt or preferred equity investment at a discount, intend to hold it until maturity and expect to recover the full value of the investment, we accrete the discount into income as an adjustment to yield over the term of the investment. If we purchase a debt or preferred equity investment at a discount with the intention of foreclosing on the collateral, we do not accrete the discount.
	Asset management fees are recognized on a straight-line basis over the term of the asset management agreement.
Allowance for Doubtful Accounts	'
	Allowance for Doubtful Accounts
	We maintain an allowance for doubtful accounts for estimated losses resulting from the inability of our tenants to make required payments. If the financial condition of a specific tenant were to deteriorate, resulting in an impairment of its ability to make payments, additional allowances may be required.
Reserve for Possible Credit Losses	'
	Reserve for Possible Credit Losses
	The expense for possible credit losses in connection with debt and preferred equity investments is the charge to earnings to increase the allowance for possible credit losses to the level that we estimate to be adequate, based on Level 3 data, considering delinquencies, loss experience and collateral quality. Other factors considered relate to geographic trends and product diversification, the size of the portfolio and current economic conditions. Based upon these factors, we establish the provision for possible credit loss on each individual investment. When it is probable that we will be unable to collect all amounts contractually due, the investment is considered impaired.
	Where impairment is indicated on an investment that is held to maturity, a valuation allowance is measured based upon the excess of the recorded investment amount over the net fair value of the collateral. Any deficiency between the carrying amount of an asset and the calculated value of the collateral is charged to expense. The write off of the reserve balance is called a charge off. We continue to assess or adjust our estimates based on circumstances of a loan and the underlying collateral. If the additional information obtained reflects increased recovery of our investment, we will adjust our reserves accordingly. There were no additional loan reserves recorded during the year ended December 31, 2013. We recorded loan loss reserves of $3.0 million and $10.9 million on investments being held to maturity during the years ended December 31, 2012 and 2011, respectively. We also recorded recoveries of approximately $2.4 million and $4.4 million during the years ended December 31, 2012 and 2011, respectively, in connection with the sale of our investments. This is included in loan loss and other investment reserves, net of recoveries on the consolidated statements of income.
	Debt and preferred equity investments held for sale are carried at the lower of cost or fair market value using available market information obtained through consultation with dealers or other originators of such investments as well as discounted cash flow models based on Level 3 data pursuant to ASC 820-10. As circumstances change, management may conclude not to sell an investment designated as held for sale. In such situations, the investment will be reclassified at its net carrying value to debt and preferred equity investments held to maturity. For these reclassified investments, the difference between the current carrying value and the expected cash to be collected at maturity will be accreted into income over the remaining term of the investment.
Rent Expense	'
	Rent Expense
	Rent expense is recognized on a straight-line basis over the initial term of the lease. The excess of the rent expense recognized over the amounts contractually due pursuant to the underlying lease is included in the deferred land lease payable on the consolidated balance sheets.
Income Taxes	'
	Income Taxes
	SL Green is taxed as a REIT under Section 856(c) of the Code. As a REIT, SL Green generally is not subject to Federal income tax. To maintain its qualification as a REIT, SL Green must distribute at least 90% of its REIT taxable income to its stockholders and meet certain other requirements. If SL Green fails to qualify as a REIT in any taxable year, we will be subject to Federal income tax on SL Green's taxable income at regular corporate rates. SL Green may also be subject to certain state, local and franchise taxes. Under certain circumstances, Federal income and excise taxes may be due on SL Green's undistributed taxable income.
	The Operating Partnership is a partnership and, as a result, all income and losses of the partnership are allocated to the partners for inclusion in their respective income tax returns. The only provision for income taxes included in the consolidated statements of income relates to the Operating Partnership’s consolidated taxable REIT subsidiaries. We may also be subject to certain state, local and franchise taxes.
	Pursuant to amendments to the Code that became effective January 1, 2001, we have elected, and may elect in the future, to treat certain of our existing or newly created corporate subsidiaries as taxable REIT subsidiaries, or a TRS. In general, a TRS may perform non-customary services for the tenants of the Company, hold assets that we cannot hold directly and generally may engage in any real estate or non-real estate related business. The TRS generates income, resulting in Federal and state income tax liability for these entities.
	During the year ended December 31, 2013, we recorded Federal, state and local tax provision of $4.4 million. There were no Federal, state and local tax provisions for the years ended December 31, 2012 and 2011.
	We follow a two-step approach for evaluating uncertain tax positions. Recognition (step one) occurs when an enterprise concludes that a tax position, based solely on its technical merits, is more-likely-than-not to be sustained upon examination. Measurement (step two) determines the amount of benefit that is more-likely-than-not to be realized upon settlement. Derecognition of a tax position that was previously recognized would occur when a company subsequently determines that a tax position no longer meets the more-likely-than-not threshold of being sustained. The use of a valuation allowance as a substitute for derecognition of tax positions is prohibited.
Underwriting Commissions and Costs	'
	Underwriting Commissions and Costs
	Underwriting commissions and costs incurred in connection with our stock offerings are reflected as a reduction of additional paid-in-capital.
Exchangeable Debt Instruments	'
	Exchangeable Debt Instruments
	The initial proceeds from exchangeable debt that may be settled in cash, including partial cash settlements, must be bifurcated between a liability component and an equity component associated with the embedded conversion option. The objective of the accounting guidance is to require the liability and equity components of exchangeable debt to be separately accounted for in a manner such that the interest expense on the exchangeable debt is not recorded at the stated rate of interest but rather at an effective rate that reflects the issuer's conventional debt borrowing rate at the date of issuance. We calculate the liability component of exchangeable debt based on the present value of the contractual cash flows discounted at our comparable market conventional debt borrowing rate at the date of issuance. The difference between the principal amount and the fair value of the liability component is reported as a discount on the exchangeable debt that is accreted as additional interest expense from the issuance date through the contractual maturity date using the effective interest method. A portion of this additional interest expense may be capitalized to the development and redevelopment balances qualifying for interest capitalization each period. The liability component of the exchangeable debt is reported net of discounts on our consolidated balance sheets. We calculate the equity component of exchangeable debt based on the difference between the initial proceeds received from the issuance of the exchangeable debt and the fair value of the liability component at the issuance date. The equity component is included in additional paid-in-capital, net of issuance costs, on our consolidated balance sheets. We allocate issuance costs for exchangeable debt between the liability and the equity components based on their relative values.
Stock-Based Employee Compensation Plans	'
	Stock-Based Employee Compensation Plans
	We have a stock-based employee compensation plan, described more fully in Note 14, "Share-based Compensation."
	Our stock options are recorded at fair value at the time of issuance. Fair value of the stock options is determined using the Black-Scholes option pricing model. The Black-Scholes model was developed for use in estimating the fair value of traded options, which have no vesting restrictions and are fully transferable. In addition, option valuation models require the input of highly subjective assumptions including the expected stock price volatility. Because our plan has characteristics significantly different from those of traded options and because changes in the subjective input assumptions can materially affect the fair value estimate, in our opinion, the existing models do not necessarily provide a reliable single measure of the fair value of our employee stock options.
	Compensation cost for stock options, if any, is recognized ratably over the vesting period of the award. Our policy is to grant options with an exercise price equal to the quoted closing market price of our stock on the grant date. Awards of stock or restricted stock are expensed as compensation over the benefit period based on the fair value of the stock on the grant date.
	For share-based awards with a performance or market measure, we recognize compensation cost over the requisite service period, using the accelerated attribution expense method. The requisite service period begins on the date the compensation committee of SL Green's board of directors authorizes the award, adopts any relevant performance measures and communicates the award to the employees. For programs with performance measures, the total estimated compensation cost is based on the fair value of the award at the applicable reporting date estimated using a binomial model. For share-based awards for which there is no pre-established performance measure, we recognize compensation cost over the service vesting period, which represents the requisite service period, on a straight-line basis. In accordance with the provisions of our share-based incentive compensation plans, we accept the return of shares of the Company's common stock, at the current quoted market price, from certain key employee to satisfy minimum statutory tax-withholding requirements related to shares that vested during the period.
	Awards can also be made in the form of a separate series of units of limited partnership interest in the Operating Partnership called long-term incentive plan units, or LTIP units. LTIP units, which can be granted either as free-standing awards or in tandem with other awards under our stock incentive plan, are valued by reference to the value of the Company's common stock at the time of grant, and are subject to such conditions and restrictions as the compensation committee of the Company's board of directors may determine, including continued employment or service, computation of financial metrics and/or achievement of pre-established performance goals and objectives.
Derivative Instruments	'
	Derivative Instruments
	In the normal course of business, we use a variety of commonly used derivative instruments, such as interest rate swaps, caps, collar and floors, to manage, or hedge, interest rate risk. We require that hedging derivative instruments are effective in reducing the interest rate risk exposure that they are designated to hedge. This effectiveness is essential for qualifying for hedge accounting. Some derivative instruments are associated with an anticipated transaction. In those cases, hedge effectiveness criteria also require that it be probable that the underlying transaction occurs. Instruments that meet these hedging criteria are formally designated as hedges at the inception of the derivative contract.
	To determine the fair values of derivative instruments, we use a variety of methods and assumptions that are based on market conditions and risks existing at each balance sheet date. For the majority of financial instruments including most derivatives, long-term investments and long-term debt, standard market conventions and techniques such as discounted cash flow analysis, option pricing models, replacement cost, and termination cost are used to determine fair value. All methods of assessing fair value result in a general approximation of value, and such value may never actually be realized.
	In the normal course of business, we are exposed to the effect of interest rate changes and limit these risks by following established risk management policies and procedures including the use of derivatives. To address exposure to interest rates, derivatives are used primarily to fix the rate on debt based on floating-rate indices and manage the cost of borrowing obligations.
	We use a variety of commonly used derivative products that are considered plain vanilla derivatives. These derivatives typically include interest rate swaps, caps, collars and floors. We expressly prohibit the use of unconventional derivative instruments and using derivative instruments for trading or speculative purposes. Further, we have a policy of only entering into contracts with major financial institutions based upon their credit ratings and other factors.
	We may employ swaps, forwards or purchased options to hedge qualifying forecasted transactions. Gains and losses related to these transactions are deferred and recognized in net income as interest expense in the same period or periods that the underlying transaction occurs, expires or is otherwise terminated.
	Hedges that are reported at fair value and presented on the balance sheet could be characterized as cash flow hedges or fair value hedges. Interest rate caps and collars are examples of cash flow hedges. Cash flow hedges address the risk associated with future cash flows of interest payments. For all hedges held by us and which were deemed to be fully effective in meeting the hedging objectives established by our corporate policy governing interest rate risk management, no net gains or losses were reported in earnings. The changes in fair value of hedge instruments are reflected in accumulated other comprehensive income. For derivative instruments not designated as hedging instruments, the gain or loss, resulting from the change in the estimated fair value of the derivative instruments, is recognized in current earnings during the period of change.
Earnings per Share of the Company	'
	Earnings per Share of the Company
	We present both basic and diluted earnings per share, or EPS. Basic EPS excludes dilution and is computed by dividing net income attributable to common stockholders by the weighted average number of common shares outstanding during the period. Basic EPS includes participating securities, consisting of unvested restricted stock that receive nonforfeitable dividends similar to shares of common stock. Diluted EPS reflects the potential dilution that could occur if securities or other contracts to issue common stock were exercised or converted into common stock, where such exercise or conversion would result in a lower EPS amount. Diluted EPS also includes units of limited partnership interest. The dilutive effect of stock options is reflected in the weighted average diluted outstanding shares calculation by application of the treasury stock method. There is no dilutive effect for the exchangeable senior debentures as the conversion premium will be paid in cash.
Earnings per Unit of the Operating Partnership	'
	Earnings per Unit of the Operating Partnership
	The Operating Partnership presents both basic and diluted earnings per unit, or EPU. Basic EPU excludes dilution and is computed by dividing net income attributable to common unitholders by the weighted average number of common units outstanding during the period. Basic EPU includes participating securities, consisting of unvested restricted units that receive nonforfeitable dividends similar to shares of common units. Diluted EPU reflects the potential dilution that could occur if securities or other contracts to issue common units were exercised or converted into common units, where such exercise or conversion would result in a lower EPU amount. The dilutive effect of unit options is reflected in the weighted average diluted outstanding units calculation by application of the treasury stock method. There is no dilutive effect for the exchangeable senior notes as the conversion premium will be paid in cash.
Use of Estimates	'
	Use of Estimates
	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.
Concentration of Credit Risk	'
	Concentrations of Credit Risk
	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 properties located in Brooklyn, Long Island. Westchester County, Connecticut, Northern New Jersey and the west coast.
Reclassification	'
	Reclassification
	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, to reclassify deferred origination fees from deferred income to debt and preferred equity investments and to reclassify contingent liabilities relating to operating escalation reimbursements from tenant and other receivables, net of allowance to accrued interest and other liabilities.
Accounting Standards Updates	'
	Accounting Standards Updates
	In May 2011, the FASB issued updated guidance on fair value measurement which amends U.S. GAAP to conform to IFRS measurement and disclosure requirements. The amendments change the wording used to describe the requirements in U.S. GAAP for measuring fair value, changes certain fair value measurement principles and enhances disclosure requirements. This guidance was effective as of the first quarter of 2012, and its adoption did not have a material impact on our consolidated financial statements.
	In December 2011, the FASB issued guidance that concluded when a parent ceases to have a controlling financial interest in a subsidiary that is in-substance real estate as a result of default on the subsidiary's nonrecourse debt, the reporting entity must apply the accounting guidance for sales of real estate to determine whether it should derecognize the in-substance real estate. The reporting entity is precluded from derecognizing the real estate until legal ownership has been transferred to the lender to satisfy the debt. The guidance was effective for calendar year-end public and nonpublic companies in 2013 and is to be applied on a prospective basis. Early adoption of the guidance is permitted. Adoption of this guidance did not have a material impact on our consolidated financial statements.
	In February 2013, the FASB issued guidance on the presentation and disclosure of reclassification adjustments out of accumulated other comprehensive income, or AOCI. The standard requires an entity to present information about significant items reclassified out of AOCI by component either on the face of the statement where net income is presented or as a separate disclosure in the notes to financial statements. The guidance was effective for calendar year-end public companies beginning in the first quarter of 2013 and its adoption did not have a material impact on our consolidated financial statements.

Organization_and_Basis_of_Pres1

Organization and Basis of Presentation (Tables)	12 Months Ended
	Dec. 31, 2013
Organization, Consolidation and Presentation of Financial Statements [Abstract]	'
Schedule of commercial office properties	'
	As of December 31, 2013, we owned the following interests in commercial office buildings in the New York Metropolitan area, primarily in midtown Manhattan, a borough of New York City. Our investments in the New York Metropolitan area also include investments in Brooklyn, Long Island, Westchester County, Connecticut and Northern New Jersey, which are collectively known as the Suburban properties:


	Location		Ownership	Number of	Square Feet (unaudited)	Weighted Average
				Buildings		Occupancy(1) (unaudited)
	Manhattan		Consolidated properties	23	17,306,045	94.5	%

			Unconsolidated properties	9	5,934,434	96.6	%


	Suburban		Consolidated properties	26	4,087,400	79.8	%

			Unconsolidated properties	4	1,222,100	87.2	%

				62	28,549,979	92.5	%

	______________________________________________________________________

	-1	The weighted average occupancy represents the total leased square feet divided by total available rentable square feet.

Significant_Accounting_Policie2

Significant Accounting Policies (Tables)	12 Months Ended
	Dec. 31, 2013
Accounting Policies [Abstract]	'
Schedule of estimated useful lives	'
	Properties are depreciated using the straight-line method over the estimated useful lives of the assets. The estimated useful lives are as follows:


	Category		Term
	Building (fee ownership)		40 years
	Building improvements		shorter of remaining life of the building or useful life
	Building (leasehold interest)		lesser of 40 years or remaining term of the lease
	Property under capital lease		remaining lease term
	Furniture and fixtures		four to seven years
	Tenant improvements		shorter of remaining term of the lease or useful life
Summary of identified intangible assets (acquired above-market leases and in-place leases) and intangible liabilities (acquired below-market leases)	'
	The following summarizes our identified intangible assets (acquired above-market leases and in-place leases) and intangible liabilities (acquired below-market leases) as of December 31, 2013 and 2012 (in thousands):


		December 31,
		2013			2012
	Identified intangible assets (included in other assets):
	Gross amount	$	746,704		$	725,861

	Accumulated amortization	(343,339		)	(263,107		)
	Net	$	403,365		$	462,754

	Identified intangible liabilities (included in deferred revenue):
	Gross amount	$	671,380		$	651,921

	Accumulated amortization	(429,138		)	(357,225		)
	Net	$	242,242		$	294,696

Schedule of estimated annual amortization of acquired below-market leases, net of acquired above-market leases	'
	The estimated annual amortization of acquired below-market leases, net of acquired above-market leases (a component of rental revenue), for each of the five succeeding years is as follows (in thousands):


	2014	$	(1,984	)
	2015	(2,464		)
	2016	(4,632		)
	2017	(3,758		)
	2018	(4,763		)
Schedule of estimated annual amortization of all other identifiable assets	'
	The estimated annual amortization of all other identifiable assets (a component of depreciation and amortization expense) including tenant improvements for each of the five succeeding years is as follows (in thousands):


	2014	$	14,938

	2015	10,387

	2016	6,878

	2017	5,482

	2018	3,978

Schedule of marketable securities	'
	At December 31, 2013 and 2012, we held the following marketable securities (in thousands):


		December 31,
		2013			2012
	Equity marketable securities	$	4,307		$	2,202

	Commercial mortgage-backed securities	24,419			15,575

	Rake bonds	3,323			3,652

	Total marketable securities available-for-sale	$	32,049		$	21,429

Property_Acquisitions_Tables

Property Acquisitions (Tables)	12 Months Ended
	Dec. 31, 2013
2013 Acquisitions	'
Property Acquisitions	'
Schedule of Recognized Identified Assets Acquired and Liabilities Assumed	'
	The following summarizes our allocation of the purchase price of the assets acquired and liabilities assumed upon the closing of these 2013 acquisitions (in thousands):



		315 West 33 Street(1)		Assemblage of Retail Development Properties on Fifth Avenue(1)			16 Court			248-252
										Bedford
										Avenue
	Land	$	116,033	$	43,800		$	19,217		$	10,865

	Building and building leasehold	270,742		102,200			63,210			44,035

	Above market lease value	—		—			5,122			—

	Acquired in-place leases	—		—			9,422			—

	Other assets, net of other liabilities	—		—			3,380			—

	Assets acquired	386,775		146,000			100,351			54,900

	Mark-to-market assumed debt	—		—			294			—

	Below market lease value	—		—			3,885			—

	Liabilities assumed	—		—			4,179			—

	Purchase price allocation	$	386,775	$	146,000		$	96,172		$	54,900

	Net consideration funded by us at closing, excluding consideration financed by debt	$	386,775	$	146,000		$	4,000		$	21,782

	Equity and/or debt investment held	$	—	$	—		$	13,835		$	—

	Debt assumed	$	—	$	—		$	84,642		$	—

	______________________________________________________________________

	-1	We are currently in the process of analyzing the purchase price allocation and, as such, we have not allocated any value to intangible assets such as above- and below-market lease or in-place leases.
2012 Acquisitions	'
Property Acquisitions	'
Schedule of Recognized Identified Assets Acquired and Liabilities Assumed	'
	The following summarizes our allocation of the purchase price of the assets acquired and liabilities assumed upon the closing of these 2012 acquisitions (in thousands):


		985-987 Third Avenue			131-137 Spring Street				635-641			304 Park			Stonehenge
									Sixth			Avenue			Properties
									Avenue			South
	Land	$	5,400		$	27,021			$	69,848		$	54,189		$	65,533

	Building and building leasehold	12,600			105,342				104,474			75,619			128,457

	Above market lease value	—			179				—			2,824			594

	Acquired in-place leases	—			7,046				7,727			8,265			9,573

	Other assets, net of other liabilities	—			—				—			—			2,190

	Assets acquired	18,000			139,588				182,049			140,897			206,347

	Fair value adjustment to mortgage note payable	—			—				—			—			—

	Below market lease value	—			17,288				9,049			5,897			13,239

	Liabilities assumed	—			17,288				9,049			5,897			13,239

	Purchase price allocation	$	18,000		$	122,300			$	173,000		$	135,000		$	193,108

	Net consideration funded by us at closing, excluding consideration financed by debt	$	18,000		$	122,300			$	173,000		$	135,000		$	78,121

	Equity and/or debt investment held	$	—		$	—			$	—		$	—		$	—

	Debt assumed	$	—		$	—			$	—		$	—		$	—

2011 Acquisitions	'
Property Acquisitions	'
Schedule of Recognized Identified Assets Acquired and Liabilities Assumed	'
	The following summarizes our allocation of the purchase price of the assets acquired and liabilities assumed upon the closing of these 2011 acquisitions (in thousands):


		51 East			180				110 East			1515			521
		42nd			Maiden				42nd			Broadway			Fifth
		Street			Lane				Street						Avenue
	Land	$	44,095		$	191,523			$	34,000		$	462,700		$	110,100

	Building and building leasehold	33,470			233,230				46,411			707,938			146,686

	Above market lease value	5,616			7,944				823			18,298			3,318

	Acquired in-place leases	4,333			29,948				5,396			98,661			23,016

	Other assets, net of other liabilities	—			—				—			27,127			—

	Assets acquired	87,514			462,645				86,630			1,314,724			283,120

	Fair value adjustment to mortgage note payable	—			—				—			(3,693		)	—

	Below market lease value	7,514			20,320				2,326			84,417			25,977

	Liabilities assumed	7,514			20,320				2,326			80,724			25,977

	Purchase price allocation	$	80,000		$	442,325			$	84,304		$	1,234,000		$	257,143

	Net consideration funded by us at closing, excluding consideration financed by debt	$	81,632		$	81,835			$	2,744		$	259,228		$	70,000

	Equity and/or debt investment held	$	—		$	—			$	16,000		$	40,942		$	41,432

	Debt assumed	$	—		$	—			$	65,000		$	458,767		$	140,000

Property_Dispositions_Tables

Property Dispositions (Tables)	12 Months Ended
	Dec. 31, 2013
Discontinued Operations and Disposal Groups [Abstract]	'
Summary of income from discontinued operations	'
	The following table summarizes net income from discontinued operations for the years ended December 31, 2013, 2012 and 2011, respectively (in thousands).


		Year Ended December 31,
		2013		2012		2011
	Revenues
	Rental revenue	$	10,656	$	18,651	$	27,093

	Escalation and reimbursement revenues	1,292		2,263		2,924

	Other income	8		8,190		121

	Total revenues	11,956		29,104		30,138

	Operating expenses	3,643		6,646		7,424

	Real estate taxes	765		1,224		2,334

	Interest expense, net of interest income	461		2,082		4,922

	Depreciable real estate reserves	2,150		—		—

	Transaction related costs	—		160		1

	Depreciation and amortization	3,212		6,373		6,715

	Amortization of deferred financing costs	—		—		182

	Total expenses	10,231		16,485		21,578

	Net income from discontinued operations	$	1,725	$	12,619	$	8,560

Debt_and_Preferred_Equity_Inve1

Debt and Preferred Equity Investments (Tables)	12 Months Ended
Debt and Preferred Equity Investments (Tables)	Dec. 31, 2013
Investments, Debt and Equity Securities [Abstract]	'
Summary of debt investments	'
	As of December 31, 2013 and 2012, we held the following debt investments with an aggregate weighted average current yield of approximately 11.47% at December 31, 2013 (in thousands):


	Loan Type		December 31, 2013			December 31, 2013			December 31, 2012			Initial
			Senior			Carrying Value,			Carrying Value,			Maturity
			Financing			Net of Discounts and Deferred Origination Fees			Net of Discounts and Deferred Origination Fees			Date
	Junior Participation		$	398,500		$	11,856		$	—		Mar-15
	Junior Participation		$	398,500		$	11,856		$	—		Mar-15
	Mezzanine Loan		205,000			68,319			66,307			Feb-16
	Mezzanine Loan		205,000			68,319			66,307			Feb-16
	Mortgage/Mezzanine Loan		166,710			44,742			44,013			May-16
	Mortgage/Mezzanine Loan		166,710			44,742			44,013			May-16
	Mezzanine Loan		177,000			15,012			15,906			May-16
	Mezzanine Loan		177,000			15,012			15,906			May-16
	Junior Participation		133,000			49,000			49,000			Jun-16
	Junior Participation		133,000			49,000			49,000			Jun-16
	Mezzanine Loan		165,000			71,312			70,967			Nov-16
	Mezzanine Loan		165,000			71,312			70,967			Nov-16
	Mortgage/Mezzanine Loan(1)		1,109,000			80,983			115,804			Mar-17
	Mortgage/Mezzanine Loan(1)		1,109,000			80,983			115,804			Mar-17
	Mezzanine Loan(2)		521,750			20,954			—			Jun-17
	Mezzanine Loan(2)		521,750			20,954			—			Jun-17
	Other Loan		15,000			3,500			3,500			Sep-21
	Other Loan		15,000			3,500			3,500			Sep-21
	Mezzanine Loan(3)		90,000			19,926			—			Nov-23
	Mezzanine Loan(3)		90,000			19,926			—			Nov-23
	Mortgage Loan(4)		—			—			218,068			—
	Mortgage Loan(4)		—			—			218,068			—
	Total fixed rate		$	2,980,960		$	385,604		$	583,565
	Total fixed rate		$	2,980,960		$	385,604		$	583,565
	Junior Participation(5)		$	80,932		$	24,046		$	—		Feb-14
	Junior Participation(5)		$	80,932		$	24,046		$	—		Feb-14
	Junior Participation(6)		57,750			10,873			10,869			Jun-14
	Junior Participation(6)		57,750			10,873			10,869			Jun-14
	Mortgage/Mezzanine Loan		330,000			131,724			131,231			Jul-14
	Mortgage/Mezzanine Loan		330,000			131,724			131,231			Jul-14
	Mezzanine Loan		180,000			59,892			59,739			Aug-14
	Mezzanine Loan		180,000			59,892			59,739			Aug-14
	Mezzanine Loan(7)		89,956			38,549			34,444			Oct-14
	Mezzanine Loan(7)		89,956			38,549			34,444			Oct-14
	Mortgage Loan		—			30,000			—			Dec-14
	Mortgage Loan		—			30,000			—			Dec-14
	Mezzanine Loan		110,000			49,110			—			Sep-15
	Mezzanine Loan		110,000			49,110			—			Sep-15
	Mezzanine Loan(8)		92,711			27,662			55,336			Dec-15
	Mezzanine Loan(8)		92,711			27,662			55,336			Dec-15
	Mezzanine Loan		775,000			72,823			—			Mar-16
	Mezzanine Loan		775,000			72,823			—			Mar-16
	Mezzanine Loan(9)		160,000			22,526			7,624			Jun-16
	Mezzanine Loan(9)		160,000			22,526			7,624			Jun-16
	Mezzanine Loan		87,300			25,590			34,761			Jul-16
	Mezzanine Loan		87,300			25,590			34,761			Jul-16
	Mezzanine Loan(10)		163,500			25,725			—			Nov-16
	Mezzanine Loan(10)		163,500			25,725			—			Nov-16
	Mezzanine Loan(11)		33,289			11,798			—			Dec-16
	Mezzanine Loan(11)		33,289			11,798			—			Dec-16
	Mortgage/Mezzanine Loan		55,000			20,553			—			Jul-18
	Mortgage/Mezzanine Loan		55,000			20,553			—			Jul-18
	Mortgage Loan		—			—			14,745			—
	Mortgage Loan		—			—			14,745			—
	Mezzanine Loan		—			—			37,288			—
	Mezzanine Loan		—			—			37,288			—
	Mortgage/Mezzanine Loan		—			—			47,253			—
	Mortgage/Mezzanine Loan		—			—			47,253			—
Total floating rate		$	2,215,438		$	550,871		$	433,290
Total floating rate		$	2,215,438		$	550,871		$	433,290
Total		5,196,398			936,475			1,016,855
Total		5,196,398			936,475			1,016,855
Loan loss reserve(12)					(1,000		)	(7,000		)
Loan loss reserve(12)					(1,000		)	(7,000		)
					$	935,475		$	1,009,855
					$	935,475		$	1,009,855
______________________________________________________________________

-1	Interest is added to the principal balance for this accrual only loan. In January 2013, we sold 50% of the mezzanine loan for $57.8 million and recognized additional income of $12.9 million, which is included in investment income on the consolidated statements of income.

-2	In October 2013, we entered into a loan participation agreement in the amount of $41.3 million on a $82.5 million mortgage. As a result of the transfer not meeting the conditions for sale accounting, the portion that was participated out has been recorded in other assets and other liabilities in the accompanying consolidated balance sheet. In addition, as of December 31, 2013, we were committed to fund an additional $20.0 million in connection with this loan.

-3	In November 2013, we entered into a loan participation agreement in the amount of $5.0 million on a $25.0 million mortgage. As a result of the transfer not meeting the conditions for sale accounting, the portion that was participated out has been recorded in other assets and other liabilities in the consolidated balance sheets.

-4	In November 2012, we acquired this nonperforming loan with an original balance of $219.0 million subject to interest based on default rate. In connection with the repayment of the loan in May 2013, we recognized additional income of $6.4 million, which is included in investment income on our consolidated statements of income.

-5	As of December 31, 2013, we were committed to fund an additional $0.9 million in connection with this loan.

-6	In December 2013, the loan was extended to June 2014.

-7	As of December 31, 2013, we were committed to fund an additional $11.2 million in connection with this loan.

-8	We funded $56.3 million at origination. In June 2013, we sold 50% of our interest in the $85.0 million mezzanine loan. Additionally, in December 2013 we closed on an $8.5 million future funding upsize, bringing our total additional committed funding amount to $22.1 million at December 31, 2013.

-9	As part of the refinancing of the related senior mortgage in June 2013, we originated a $30.0 million mezzanine loan and our previous investment in the amount of $15.0 million, including the $7.4 million participated interest, was repaid in full. Following the refinancing, we entered into a loan participation agreement in the amount of $7.4 million on a $30.0 million mortgage. Due to our continued involvement with the loan, the portion that was participated out has been recorded in other assets and other liabilities in the consolidated balance sheets.

-10	As of December 31, 2013, we were committed to fund an additional $11.4 million in connection with this loan.

-11	As of December 31, 2013, we were committed to fund an additional $0.3 million in connection with this loan.

-12	Loan loss reserves are specifically allocated to investments. Our reserves reflect management's judgment of the probability and severity of losses based on Level 3 data. We cannot be certain that our judgment will prove to be correct or that reserves will be adequate over time to protect against potential future losses.
Summary of preferred equity investments	'
	As of December 31, 2013 and 2012, we held the following preferred equity investments with an aggregate weighted average current yield of approximately 10.91% at December 31, 2013 (in thousands):


	Type		December 31, 2013			December 31, 2013			December 31, 2012			Initial
			Senior			Carrying Value,			Carrying Value,			Mandatory
			Financing			Net of Discounts and Deferred Origination Fees			Net of Discounts and Deferred Origination Fees			Redemption
	Preferred equity(1)		$	525,000		$	115,198		$	99,768		Jul-15
	Preferred equity(1)		$	525,000		$	115,198		$	99,768		Jul-15
	Preferred equity(1)(2)		55,747			25,896			18,925			Apr-16
	Preferred equity(1)(2)		55,747			25,896			18,925			Apr-16
	Preferred equity(1)		926,260			218,330			209,959			Jul-16
	Preferred equity(1)		926,260			218,330			209,959			Jul-16
	Preferred equity		70,000			9,940			9,927			Nov-17
	Preferred equity		70,000			9,940			9,927			Nov-17
			$	1,577,007		$	369,364		$	338,579
			$	1,577,007		$	369,364		$	338,579
	______________________________________________________________________

	-1	The difference between the pay and accrual rates is included as an addition to the principal balance outstanding.

	-2	As of December 31, 2013, the loan is fully funded.
Rollforward of total allowance for loan loss reserves	'
	The following table is a rollforward of our total loan loss reserves at December 31, 2013, 2012 and 2011 (in thousands):


		December 31,
		2013			2012			2011
	Balance at beginning of year	$	7,000		$	50,175		$	61,361
	Balance at beginning of year	$	7,000		$	50,175		$	61,361
	Expensed	—			3,000			10,875
	Expensed	—			3,000			10,875
	Recoveries	—			(2,436		)	(4,370		)
	Recoveries	—			(2,436		)	(4,370		)
	Charge-offs and reclassifications	(6,000		)	(43,739		)	(17,691		)
	Balance at end of period	$	1,000		$	7,000		$	50,175
	Balance at end of period	$	1,000		$	7,000		$	50,175
Summary of impaired loans, which may include non-accrual loans	'
	The following table presents impaired loans, which may include non-accrual loans, as of December 31, 2013 and 2012, respectively (in thousands):


		31-Dec-13									31-Dec-12
		Unpaid			Recorded			Allowance			Unpaid		Recorded		Allowance
		Principal			Investment			Allocated			Principal		Investment		Allocated
		Balance									Balance
	With no related allowance recorded:
	Commercial real estate	$	—		$	—		$	—		$	—	$	—	$	—
	Commercial real estate	$	—		$	—		$	—		$	—	$	—	$	—
	With an allowance recorded:
	Commercial real estate	10,750			10,750			1,000			10,750		10,750		7,000
	Commercial real estate	10,750			10,750			1,000			10,750		10,750		7,000
	Total	$	10,750		$	10,750		$	1,000		$	10,750	$	10,750	$	7,000
	Total	$	10,750		$	10,750		$	1,000		$	10,750	$	10,750	$	7,000
Summary of average recorded investment in impaired loans, including non-accrual loans and the related investment and preferred equity income recognized	'
	The following table presents the average recorded investment in impaired loans, which may include non-accrual loans and the related investment and preferred equity income recognized during the years ended December 31, 2013 and 2012, respectively (in thousands):


		Year Ended
		December 31,
		2013			2012
	Average recorded investment in impaired loans	$	10,881		$	50,231
	Average recorded investment in impaired loans	$	10,881		$	50,231
	Investment income recognized	7,117			3,712
	Investment income recognized	7,117			3,712

Investment_in_Unconsolidated_J1

Investment in Unconsolidated Joint Ventures (Tables)	12 Months Ended
	Dec. 31, 2013
Equity Method Investments and Joint Ventures [Abstract]	'
Schedule of general information on joint ventures	'
	The table below provides general information on each of our joint ventures as of December 31, 2013 (amounts in thousands):


	Property	Partner		Ownership	Economic		Square			Acquisition Date		Acquisition
				Interest	Interest		Feet					Price(1)
	100 Park Avenue	Prudential		49.90%	49.90%		834			Jan-00		$	95,800

	21 West 34th Street	Sutton		50.00%	50.00%		30			Jul-05		22,400

	1604-1610 Broadway(2)	Onyx		70.00%	70.00%		30			Nov-05		4,400

	717 Fifth Avenue(3)	Sutton/Private Investor		10.92%	10.92%		120			Sep-06		251,900

	800 Third Avenue	Private Investors		42.95%	42.95%		526			Dec-06		285,000

	1745 Broadway	Witkoff/SITQ/Lehman Bros.		32.26%	32.26%		674			Apr-07		520,000

	1 and 2 Jericho Plaza	Onyx/Credit Suisse		20.26%	20.26%		640			Apr-07		210,000

	The Meadows	Onyx		50.00%	50.00%		582			Sep-07		111,500

	388 and 390 Greenwich Street(4)	SITQ		50.60%	50.60%		2,600			Dec-07		1,575,000

	180/182 Broadway(5)	Harel/Sutton		25.50%	25.50%		71			Feb-08		43,600

	600 Lexington Avenue	CPPIB		55.00%	55.00%		304			May-10		193,000

	11 West 34th Street(6)	Private Investor/Sutton		30.00%	30.00%		17			Dec-10		10,800

	7 Renaissance	Cappelli		50.00%	50.00%		37			Dec-10		4,000

	3 Columbus Circle(7)	Moinian		48.90%	48.90%		769			Jan-11		500,000

	280 Park Avenue(8)	Vornado		50.00%	49.50%		1,237			Mar-11		400,000

	1552-1560 Broadway(9)	Sutton		50.00%	50.00%		49			Aug-11		136,550

	747 Madison Avenue(10)	Harel/Sutton		33.33%	33.33%		10			Sep-11		66,250

	724 Fifth Avenue	Sutton		50.00%	50.00%		65			Jan-12		223,000

	10 East 53rd Street	CPPIB		55.00%	55.00%		390			Feb-12		252,500

	33 Beekman(11)	Harel/Naftali		45.90%	45.90%		145			Aug-12		31,000

	West Coast office portfolio(12)	Blackstone		42.02%	43.74%		4,474			Sep-12		880,103

	521 Fifth Avenue(13)	Plaza		50.50%	50.50%		460			Nov-12		315,000

	21 East 66th Street(14)	Private Investors		32.28%	32.28%		17			Dec-12		75,000

	315 West 36th Street	Private Investors		35.50%	35.50%		148			Dec-12		45,000

	Herald Center(15)	AG		40.00%	40.00%		365			Jan-13		50,000

	650 Fifth Avenue(16)	Sutton		50.00%	50.00%		32			Nov-13		—

	______________________________________________________________________

	-1	Acquisition price represents the actual or implied gross purchase price for the joint venture.

	-2	In March 2013, Sutton conveyed his interest in this property to us. In January 2014, our ground lease position was terminated.

-3	In June 2012, this retail condominium was recapitalized. The recapitalization triggered a promote to our partner, which resulted in a reduction of our economic interest. In addition, we sold 50% of our remaining interest at a property valuation of $617.6 million. We recognized $67.9 million of additional cash income, equivalent to profit, due to the distribution of refinancing proceeds and a gain on sale of $3.0 million, which is net of a $1.0 million employee compensation award, accrued in connection with the realization of this investment gain as a bonus to certain employees that were instrumental in realizing the gain on this sale.

-4	The property is subject to a triple-net lease arrangement with a single tenant, which expires in 2020. In December 2013, the joint venture signed an agreement extending the lease through December 31, 2035. The agreement includes an option for the tenant to acquire the property for a specified price during the period from December 1, 2017 through December 31, 2020.

-5	In June 2013, the joint venture completed its redevelopment project. In July 2013, the lease for Pace University, or Pace, its primary tenant, commenced.

-6	The property is subject to a long-term net lease arrangement.

-7	As a result of the sale of a condominium interest in September 2012, Young & Rubicam, Inc., or Y&R, owns a portion of the property, generally floors three through eight referred to as Y&R units. Because the joint venture has an option to repurchase the Y&R units, no gain was recognized on this sale.

-8	In March 2011, we contributed our debt investment with a carrying value of $286.6 million to a newly formed joint venture in which we hold a 50% interest. We realized $38.7 million of additional income upon the contribution. This income is included in investment income in the consolidated statements of income. The joint venture paid us approximately $111.3 million and also assumed $30.0 million of related floating rate financing which matures in June 2016. In May 2011, this joint venture took control of the underlying property as part of a recapitalization transaction which valued the investment at approximately $1.1 billion.

-9	In connection with this acquisition, the joint venture also acquired a long-term leasehold interest in the retail space and certain other spaces at 1560 Broadway, which is adjacent to 1552 Broadway. The purchase price relates only to the purchase of the 1552 Broadway interest which comprises 13,045 square feet. In 2012, we, along with Sutton, acquired the property at 155 West 46th Street, which is adjacent to 1552 and 1560 Broadway, and sold it to the fee owner of 1560 Broadway.

-10	The joint venture owns 100% interest as tenant-in-common in 30 East 65th Street Corporation and the related proprietary lease of three cooperative apartment units in the building. In October 2013, the joint ventured acquired two additional cooperative apartment units in the building for $7.5 million.

-11	The joint venture acquired the fee interest in the property and will develop an approximately 30 story building for student housing. Upon completion of the development, the joint venture will convey a long-term ground lease condominium interest in the building to Pace.

-12	In September 2012, the Company, together with an affiliate of Blackstone, Gramercy and Square Mile Capital Management LLC, or Square Mile, formed a joint venture to recapitalize a 31-property, 4.5-million-square-foot West Coast office portfolio. The joint venture extended the $678.8 million mortgage secured by the portfolio for a term of 2 years with a 1-year extension option. In addition, the joint venture entered into a new $68.0 million mezzanine loan for a term of 2 years. Prior to the recapitalization in September 2012, the Company held $26.7 million in mezzanine and preferred equity positions in the entity that owned the portfolio. Following the recapitalization, Blackstone became the majority owner of the joint venture, with Equity Office Properties, a Blackstone affiliate, being responsible for the portfolio’s management and leasing. In February 2013, we acquired Gramercy’s 10.73% interest in the joint venture and simultaneously sold 20.78% of the newly acquired interest to Square Mile Capital Management LLC or Square Mile. During the year ended December 31, 2013, we acquired Square Mile’s 6.00% interest in the joint venture and the joint venture sold three of the properties for an aggregate of $224.3 million, on which we recognized a gain of approximately $2.1 million. The proceeds from the sale of these properties were used primarily to repay $194.5 million of the mortgage and $20.5 million of the mezzanine loan.

-13	In November 2012, we sold our 49.5% partnership interest in 521 Fifth Avenue to Plaza Global Real Estate Partners for a gross valuation price of $315.0 million for this property. We recognized a gain of $19.4 million on the sale which is net of a $1.0 million employee compensation award, accrued in connection with the realization of this investment gain as a bonus to certain employees that were instrumental in realizing the gain on this sale. We also refinanced the existing $150.0 million loan with a $170.0 million 7-year mortgage loan which bears interest at 220 basis points over LIBOR. Following the sale, we deconsolidated the entity effective November 30, 2012 and have accounted our investment under the equity method because of lack of control. During the year ended December 31, 2013, we recognized additional post closing costs of $2.8 million as an adjustment to the gain.

-14	We hold a 32.28% interest in 3 retail and 2 residential units at the property and a 16.14% in 4 residential units at the property.

-15	The joint venture owned a preferred equity interest in an entity that holds the interest in a mixed commercial use property located in Manhattan. The preferred equity bore interest at a rate of 8.75% per annum through its redemption date in December 2013.

-16	The joint venture owns a long-term leasehold interest in the retail space at 650 Fifth Avenue. In connection with the ground lease obligation, SLG provided a performance guaranty and Sutton executed a contribution agreement to reflect its pro rata obligation. In an event the property is converted into a condominium unit and the landlord elects the purchase option, the joint venture shall be obligated to acquire the unit at the then fair value. In November 2013, the joint venture signed an agreement to buy out the lease of retailer Juicy Couture for $51.0 million as part of its plan to redevelop and reposition the property. Under this agreement, the tenant shall terminate the lease no later than April 2014.
Schedule of first mortgage notes payable collateralized by the respective joint venture properties and assignment of leases	'
	The first mortgage notes and other loans payable collateralized by the respective joint venture properties and assignment of leases at December 31, 2013 and 2012, respectively, are as follows (amounts in thousands):


	Property		Maturity Date		Interest			31-Dec-13				31-Dec-12
					Rate(1)
	100 Park Avenue		Sep-14		6.64	%		$	209,786			$	212,287

	7 Renaissance		Dec-15		10	%		1,276				856

	11 West 34th Street		Jan-16		4.82	%		17,205				17,491

	280 Park Avenue		Jun-16		6.57	%		706,886				710,000

	21 West 34th Street		Dec-16		5.76	%		100,000				100,000

	1745 Broadway		Jan-17		5.68	%		340,000				340,000

	1 and 2 Jericho Plaza		May-17		5.65	%		163,750				163,750

	800 Third Avenue		Aug-17		6	%		20,910				20,910

	388 and 390 Greenwich Street(2)		Dec-17		3.2	%		996,082				996,082

	315 West 36th Street		Dec-17		3.16	%		25,000				25,000

	717 Fifth Avenue(3)		Jul-22		4.45	%		300,000				300,000

	21 East 66th Street(4)		Apr-23		4.1	%		12,000				12,000

	717 Fifth Avenue(3)		Jul-24		9	%		304,000				294,509

	1604-1610 Broadway(5)		—		5.66	%		27,000				27,000

	Total fixed rate debt							$	3,223,895			$	3,219,885

	West Coast office portfolio(6)		Sep-14		3.93	%		526,290				745,025

	747 Madison Avenue		Oct-14		2.97	%		33,125				33,125

	180/182 Broadway(7)		Dec-14		2.94	%		89,893				71,524

	The Meadows(8)		Sep-15		7.75	%		67,350				57,000

	3 Columbus Circle(9)		Apr-16		2.38	%		239,233				247,253

	1552 Broadway(10)		Apr-16		3.48	%		158,690				113,869

	Other loan payable		Jun-16		1.09	%		30,000				30,000

	724 Fifth Avenue		Jan-17		2.54	%		120,000				120,000

	10 East 53rd Street		Feb-17		2.69	%		125,000				125,000

	33 Beekman(11)		Aug-17		2.94	%		18,362				18,362

	600 Lexington Avenue		Oct-17		2.28	%		120,616				124,384

	388 and 390 Greenwich Street(2)		Dec-17		1.34	%		142,297				142,297

	521 Fifth Avenue		Nov-19		2.39	%		170,000				170,000

	21 East 66th Street		Jun-33		2.88	%		1,959				2,033

27-29 West 34th Street(12)							—				53,375

16 Court Street(13)							—				84,916

Total floating rate debt							$	1,842,815			$	2,138,163

Total joint venture mortgages and other loans payable							$	5,066,710			$	5,358,048

_________________________________

-1	Effective weighted average interest rate for the year ended December 31, 2013, taking into account interest rate hedges in effect during the period.

-2	These loans are comprised of a $576.0 million mortgage and a $562.4 million mezzanine loan, both of which are fixed rate loans, except for $72.0 million of the mortgage and $70.3 million of the mezzanine loan which are floating. Up to $200.0 million of the mezzanine loan, secured indirectly by these properties, is recourse to us. We believe it is unlikely that we will be required to perform under this guarantee.

-3	In June 2012, the joint venture replaced the $245.0 million floating rate mortgage loan, which bore interest at 275 basis points over LIBOR and was due to mature in September 2012, with a $300.0 million fixed rate mortgage loan and $290.0 million mezzanine loan which is subject to accretion based on the difference between contractual interest rate and contractual pay rate.

-4	In April 2013, the loan was refinanced at par and its maturity was extended to April 2023.

-5	This loan went into default in November 2009 due to the non-payment of debt service.

-6	As a result of the sale of three of its properties, the joint venture paid down $194.5 million of its mortgage and $20.5 million of its mezzanine loan.

-7	This loan has a committed amount of $90.0 million. In November 2013, this loan was extended by one-year, subject to principal amortization through the maturity date.

-8	As a result of the refinancing and restructuring in August 2012, we replaced the previous mortgage with a $60.0 million, three-year mortgage, of which $3.0 million was unfunded as of December 31, 2012, and recognized additional income of $10.8 million due to the repayment of the previous mortgage at a discount. In December 2013, the joint venture upsized the original mortgage with a maximum amount of $60.0 million to $67.4 million. All other terms of the loan remained the same.

-9	This loan has a committed amount of $260.0 million. The joint venture has the ability to increase the mortgage by $40.0 million based on meeting certain performance hurdles. In connection with this obligation, we executed a master lease agreement and our joint venture partner executed a contribution agreement to reflect its pro rata obligation under the master lease. The lien on the mortgage and the master lease excludes the condominium interest owned by Y&R. See Note 7 of prior table.

-10	In April 2013, we refinanced the previous $119.6 million mortgage with a $200.0 million three-year loan construction financing facility comprised of a $170.0 million mortgage loan and a $30.0 million mezzanine loan. The facility has two one-year extension options. As of December 31, 2013, $37.6 million of the mortgage loan and $3.7 million of the mezzanine loan remained unfunded.

-11	This loan has a committed amount of $75.0 million, which is recourse to us. Our partner has indemnified us for its pro rata share of the recourse guarantee. A portion of the guarantee terminates upon the joint venture reaching certain milestones. We believe it is unlikely that we will be required to perform under this guarantee.

-12	In May 2013, this loan was refinanced and its maturity was extended to May 2018. In December 2013, we sold our interest in the joint venture, inclusive of our share in the joint venture debt.

-13	In April 2013, we acquired interests from our joint venture partner, CIF, and have consolidated the entity due to our controlling interest.
Schedule of combined balance sheets for the unconsolidated joint ventures	'
	The combined balance sheets for the unconsolidated joint ventures, at December 31, 2013 and 2012, are as follows (in thousands):


		December 31,
		2013			2012
	Assets
	Commercial real estate property, net	$	6,846,021		$	6,910,991

	Other assets	827,282			728,113

	Total assets	$	7,673,303		$	7,639,104

	Liabilities and members' equity
	Mortgages and other loans payable	$	5,066,710		$	5,358,048

	Other liabilities	596,960			406,929

	Members' equity	2,009,633			1,874,127

	Total liabilities and members' equity	$	7,673,303		$	7,639,104

	Company's investments in unconsolidated joint ventures	$	1,113,218		$	1,032,243

Schedule of combined statements of income for the unconsolidated joint ventures	'
	The combined statements of income for the unconsolidated joint ventures, from acquisition date through the years ended December 31, 2013, 2012 and 2011 are as follows (in thousands):


		Years Ended December 31,
		2013			2012				2011
	Total revenues	$	628,649		$	511,157			$	480,935

	Operating expenses	114,633			80,722				71,830

	Ground rent	2,863			2,975				3,683

	Real estate taxes	71,755			53,613				51,511

	Interest expense, net of interest income	225,765			221,476				210,489

	Amortization of deferred financing costs	17,092			9,739				12,911

	Transaction related costs	808			2,044				2,665

	Depreciation and amortization	192,504			166,336				137,070

	Total expenses	625,420			536,905				490,159

	Gain on early extinguishment of debt	—			21,421				—

	Net income (loss) before gain on sale	$	3,229		$	(4,327	)		$	(9,224	)

	Company's equity in net income from unconsolidated joint ventures	$	9,921		$	76,418			$	1,583

Deferred_Costs_Tables

Deferred Costs (Tables)	12 Months Ended
	Dec. 31, 2013
Deferred Costs [Abstract]	'
Schedule of components of deferred costs	'
	Deferred costs at December 31, 2013 and 2012 consisted of the following (in thousands):


		December 31,
		2013			2012
	Deferred leasing	$	326,379		$	285,931

	Deferred financing	157,088			152,596

		483,467			438,527

	Less accumulated amortization	(216,409		)	(177,382		)
	Deferred costs, net	$	267,058		$	261,145

Mortgages_and_Other_Loans_Paya1

Mortgages and Other Loans Payable (Tables)	12 Months Ended
	Dec. 31, 2013
Mortgages and Other Loans Payable	'
Schedule of first mortgages and other loans payable collateralized by the respective properties and assignment of leases	'
	The first mortgages and other loans payable collateralized by the respective properties and assignment of leases at December 31, 2013 and 2012, respectively, were as follows (amounts in thousands):


	Property	Maturity	Interest			31-Dec-13			31-Dec-12
		Date	Rate(1)
	609 Partners, LLC(2)	Jul-14	5	%		$	23		$	23

	125 Park Avenue	Oct-14	5.75	%		146,250			146,250

	711 Third Avenue	Jun-15	4.99	%		120,000			120,000

	625 Madison Avenue	Nov-15	7.27	%		120,830			125,603

	500 West Putnam	Jan-16	5.52	%		23,529			24,060

	420 Lexington Avenue	Sep-16	7.15	%		182,641			184,992

	Landmark Square	Dec-16	4	%		82,909			84,486

	485 Lexington Avenue	Feb-17	5.61	%		450,000			450,000

	120 West 45th Street	Feb-17	6.12	%		170,000			170,000

	762 Madison Avenue	Feb-17	3.75	%		8,211			8,371

	2 Herald Square	Apr-17	5.36	%		191,250			191,250

	885 Third Avenue	Jul-17	6.26	%		267,650			267,650

	Other loan payable(3)	Sep-19	8	%		50,000			50,000

	One Madison Avenue	May-20	5.91	%		587,336			607,678

	100 Church	Jul-22	4.68	%		230,000			230,000

	919 Third Avenue(4)	Jun-23	5.12	%		500,000			500,000

	400 East 57th Street	Feb-24	4.13	%		70,000			70,000

	400 East 58th Street	Feb-24	4.13	%		30,000			30,000

	1515 Broadway(5)	Mar-25	3.93	%		900,000			—

	300 Main Street(6)	—	—			—			11,500

	220 East 42nd Street(7)	—	—			—			185,906

	Total fixed rate debt					$	4,130,629		$	3,457,769

	Master repurchase(8)	Dec-14	3.28	%		91,000			116,667

	16 Court Street(9)	Apr-16	3.22	%		79,243			—

	180 Maiden Lane(10)	Nov-16	2.39	%		262,706			271,215

	248-252 Bedford Avenue	Mar-18	2.44	%		22,000			—

	220 East 42nd Street(7)	Oct-20	4.05	%		275,000			—

	1515 Broadway(5)	—	—			—			769,813

	Total floating rate debt					$	729,949		$	1,157,695

Total mortgages and other loans payable					$	4,860,578		$	4,615,464

_________________________________

-1	Effective weighted average interest rate for the year ended December 31, 2013, taking into account interest rate hedges in effect during the period.

-2	As part of an acquisition, the Operating Partnership issued 63.9 million units of its 5.0% Series E preferred units, or the Series E units, with a liquidation preference of $1.00 per unit. As of December 31, 2013, 22,658 Series E units remaining outstanding.

-3	This loan is secured by a portion of a preferred equity investment.

-4	We own a 51.0% controlling interest in the joint venture that is the borrower on this loan. This loan is non-recourse to us.

-5	In April 2012, we refinanced the previous $447.2 million mortgage with a $775.0 million seven-year mortgage. In February 2013, we refinanced the previous $775.0 million mortgage with a new $900.0 million 12-year mortgage and realized a net loss on early extinguishment of debt of approximately $18.5 million, including a prepayment penalty of $7.6 million.

-6	The property was sold in September 2013.

-7	In October 2013, we closed on a $275.0 million seven-year mortgage. This new mortgage replaced the $185.9 million previous mortgage that was repaid in August 2013.

-8	In December 2013, we entered into a new Master Repurchase Agreement, or MRA, with a maximum facility capacity of $300.0 million, under which we agreed to sell certain debt investments in exchange for cash with a simultaneous agreement to repurchase the same debt investments at a certain date or on demand. This new MRA, which bears interest ranging from 250 and 325 basis points over one-month LIBOR depending on the pledged collateral, replaced the previous $175.0 million MRA facility, which bore interest based on one-month LIBOR plus 300 basis points basis points through September 2013 and 350 basis points through November 2013.

-9	In April 2013, we acquired interests from our joint venture partner, CIF, and have consolidated the entity due to our controlling interest. In December 2013, we repaid $5.0 million of the principal balance and modified and extended the terms of the existing mortgage. The modified mortgage bears interest based on one-month LIBOR plus 350 basis points with a floor of 50 basis points.

-10	In connection with this consolidated joint venture obligation, we executed a master lease agreement. Our partner has executed a contribution agreement to reflect its pro rata share of the obligation under the master lease.

Corporate_Indebtedness_Tables

Corporate Indebtedness (Tables)	12 Months Ended
	Dec. 31, 2013
Debt Disclosure [Abstract]	'
Schedule of senior unsecured notes and other related disclosures by scheduled maturity date	'
	The following table sets forth our senior unsecured notes and other related disclosures as of December 31, 2013 and 2012, respectively by scheduled maturity date (amounts in thousands):


	Issuance		December 31,			December 31,			31-Dec-12			Coupon		Effective		Term		Maturity Date
			2013			2013			Accreted			Rate(1)		Rate		(in Years)
			Unpaid			Accreted			Balance
			Principal			Balance
			Balance
	August 13, 2004(2)(3)		$	75,898		$	75,898		$	75,898		5.88	%	5.88	%	10		August 15, 2014

	March 31, 2006(2)(3)		255,308			255,206			255,165			6	%	6	%	10		March 31, 2016

	October 12, 2010(4)		345,000			297,837			287,373			3	%	3	%	7		October 15, 2017

	August 5, 2011(5)		250,000			249,681			249,620			5	%	5	%	7		August 15, 2018

	March 16, 2010(5)		250,000			250,000			250,000			7.75	%	7.75	%	10		March 15, 2020

	November 15, 2012(5)		200,000			200,000			200,000			4.5	%	4.5	%	10		December 1, 2022

	June 27, 2005(2)(6)		7			7			7			4	%	4	%	20		June 15, 2025

	March 26, 2007(7)		10,701			10,701			16,893			3	%	3	%	20		March 30, 2027

			$	1,386,914		$	1,339,330		$	1,334,956

	_________________________________

	-1	Interest on the senior unsecured notes is payable semi-annually with principal and unpaid interest due on the scheduled maturity dates.

	-2	Issued by ROP.

	-3	On December 27, 2012, we repurchased $42.4 million of aggregate principal amount of these notes, consisting of $22.7 million of the 5.875% Notes and $19.7 million of the 6.0% Notes, for a total consideration of $46.4 million and realized a net loss on early extinguishment of debt of approximately $3.8 million.

	-4	In October 2010, the Operating Partnership issued $345.0 million of these exchangeable notes. Interest on these notes is payable semi-annually on April 15 and October 15. The notes had an initial exchange rate representing an exchange price that was set at a 30.0% premium to the last reported sale price of SL Green's common stock on October 6, 2010, or $85.81. The initial exchange rate is subject to adjustment under certain circumstances. The current exchange rate is 11.7153 shares of SL Green's common stock per $1,000 principal amount of these notes. The notes are senior unsecured obligations of the Operating Partnership and are exchangeable upon the occurrence of specified events and during the period beginning on the twenty-second scheduled trading day prior to the maturity date and ending on the second business day prior to the maturity date, into cash or a combination of cash and shares of SL Green's common stock, if any, at our option. The notes are guaranteed by ROP. On the issuance date, $78.3 million of the debt balance was recorded in equity. As of December 31, 2013, approximately $47.2 million remained to be amortized into the debt balance.

	-5	Issued by the Company, the Operating Partnership and ROP, as co-obligors.

	-6	Exchangeable senior debentures which are currently callable at par. In addition, the debentures can be put to ROP, at the option of the holder at par plus accrued and unpaid interest, on June 15, 2015 and 2020 and upon the occurrence of certain change of control transactions. As a result of the acquisition of all outstanding shares of common stock of Reckson, or the Reckson Merger, the adjusted exchange rate for the debentures is 7.7461 shares of SL Green's common stock per $1,000 of principal amount of debentures and the adjusted reference dividend for the debentures is $1.3491. During the year ended December 31, 2012, we repurchased $650,000 of these bonds at par.

	-7	In March 2007, the Operating Partnership issued $750.0 million of these exchangeable notes. Interest on these notes is payable semi-annually on March 30 and September 30. The notes have an initial exchange rate representing an exchange price that was set at a 25.0% premium to the last reported sale price of the Company's common stock on March 20, 2007, or $173.30. The initial exchange rate is subject to adjustment under certain circumstances. The notes are senior unsecured obligations of the Operating Partnership and are exchangeable upon the occurrence of specified events and during the period beginning on the twenty-second scheduled trading day prior to the maturity date and ending on the second business day prior to the maturity date, into cash or a combination of cash and shares of SL Green's common stock, if any, at our option. The notes are currently redeemable at the Operating Partnership’s option. The Operating Partnership may be required to repurchase the notes on March 30, 2017 and 2022, and upon the occurrence of certain designated events. On March 30, 2012, we repurchased $102.2 million of aggregate principal amount of the exchangeable notes pursuant to a mandatory offer to repurchase the notes. On the issuance date, $66.6 million was recorded in equity and was fully amortized into the debt balance as of March 31, 2012. During the year ended December 31, 2013, we repurchased $6.2 million of aggregate principal amount of exchangeable notes at approximately at par.
Schedule of combined aggregate principal maturities	'
	Combined aggregate principal maturities of mortgages and other loans payable, 2012 revolving credit facility, trust preferred securities, senior unsecured notes and our share of joint venture debt as of December 31, 2013, including as-of-right extension options, were as follows (in thousands):


		Scheduled			Principal			Revolving			Trust			Tern Loan and Senior			Total		Joint
		Amortization			Repayments			Credit			Preferred			Unsecured					Venture
								Facility			Securities			Notes					Debt
	2014	$	43,976		$	237,273		$	—		$	—		$	75,898		$	357,147	$	398,312

	2015	47,312			229,537			—			—			7			276,856		45,332

	2016	55,938			594,017			—			—			255,308			905,263		604,510

	2017	61,213			1,086,579			220,000			—			355,701			1,723,493		930,338

	2018	64,205			21,363			—			—			650,000			735,568		28

	Thereafter	247,407			2,171,758			—			100,000			450,000			2,969,165		173,944

		$	520,051		$	4,340,527		$	220,000		$	100,000		$	1,786,914		$	6,967,492	$	2,152,464

Schedule of consolidated interest expense, excluding capitalized interest	'
	Consolidated interest expense, excluding capitalized interest, was comprised of the following (in thousands):


		Years Ended December 31,
		2013			2012			2011
	Interest expense	$	332,276		$	331,516		$	287,252

	Interest income	(2,061		)	(1,619		)	(2,004		)
	Interest expense, net	$	330,215		$	329,897		$	285,248

	Interest capitalized	$	11,475		$	12,218		$	5,123

Related_Party_Transactions_Tab

Related Party Transactions (Tables)	12 Months Ended
	Dec. 31, 2013
Related Party Transactions [Abstract]	'
Schedule of amounts due from/to related parties	'
	Amounts due from/to related parties at December 31, 2013 and 2012 consisted of the following (in thousands):


		December 31,
		2013		2012
	Due from joint ventures	$	2,376	$	511

	Other	6,154		7,020

	Related party receivables	$	8,530	$	7,531


	Due to a joint venture (included in Accounts payable and accrued expenses)	$	—	$	(8,401	)

Noncontrolling_Interests_on_th

Noncontrolling Interests on the Company's Consolidated Financial Statements (Tables)	12 Months Ended
	Dec. 31, 2013
Noncontrolling Interest [Abstract]	'
Schedule of Noncontrolling Interest	'
	Below is the rollforward analysis of the activity relating to the noncontrolling interests in the Operating Partnership (in thousands) as of December 31, 2013, and 2012:


		2013			2012
	Balance at beginning of period	$	212,907		$	195,030

	Distributions	(4,146		)	(3,296		)
	Issuance of common units	24,750			42,239

	Redemption of common units	(17,287		)	(87,513		)
	Net income	3,023			5,597

	Accumulated other comprehensive income (loss) allocation	611			(388		)

	Fair value adjustment	45,618			61,238

	Balance at end of period	$	265,476		$	212,907

Stockholders_Equity_of_the_Com1

Stockholders' Equity of the Company (Tables)	12 Months Ended
	Dec. 31, 2013
Stockholders' Equity Note [Abstract]	'
Schedule of Earnings Per Share	'
	Earnings per share for the years ended December 31, 2013, 2012 and 2011 is computed as follows (in thousands):


		December 31,
	Numerator	2013			2012			2011
	Basic Earnings:
	Income attributable to SL Green common stockholders	$	101,330		$	155,984		$	617,232

	Effect of Dilutive Securities:
	Redemption of units to common shares	3,023			5,597			14,629

	Stock options	—			—			—

	Diluted Earnings:
	Income attributable to SL Green common stockholders	$	104,353		$	161,581		$	631,861



		December 31,
	Denominator	2013		2012			2011
	Basic Shares:
	Weighted average common stock outstanding	92,269		89,319			83,762

	Effect of Dilutive Securities:
	Redemption of units to common shares	2,735		3,207			1,985

	3.0% exchangeable senior debentures due 2017	—		—			—

	3.0% exchangeable senior debentures due 2027	—		—			—

	4.0% exchangeable senior debentures due 2025	—		—			—

	Stock-based compensation plans	262		347			497

	Diluted weighted average common stock outstanding	95,266		92,873			86,244

Partners_Capital_of_the_Operat1

Partners' Capital of the Operating Partnership (Tables)	12 Months Ended
	Dec. 31, 2013
Equity [Abstract]	'
Schedule of calculation of numerator and denominator in earnings per unit	'
	Earnings per unit for the years ended December 31, 2013, 2012 and 2011 is computed as follows (in thousands):


		December 31,
	Numerator	2013			2012			2011
	Basic Earnings:
	Income attributable to SLGOP common unitholders	$	104,353		$	161,581		$	631,861

	Effect of Dilutive Securities:
	Stock options	—			—			—

	Diluted Earnings:
	Income attributable to SLGOP common unitholders	$	104,353		$	161,581		$	631,861



		December 31,
	Denominator	2013		2012			2011
	Basic units:
	Weighted average common units outstanding	95,004		92,526			85,747

	Effect of Dilutive Securities:
	3.0% exchangeable senior debentures due 2017	—		—			—

	3.0% exchangeable senior debentures due 2027	—		—			—

	4.0% exchangeable senior debentures due 2025	—		—			—

	Stock-based compensation plans	262		347			497

	Diluted weighted average common units outstanding	95,266		92,873			86,244

Sharebased_Compensation_Tables

Share-based Compensation (Tables)	12 Months Ended
	Dec. 31, 2013
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]	'
Schedule of weighted average assumptions used to estimate the grant date fair value of options granted	'
	The fair value of each stock option granted is estimated on the date of grant using the Black-Scholes option pricing model based on historical information with the following weighted average assumptions for grants during the years ended December 31, 2013, 2012 and 2011, respectively.


		2013			2012			2011
	Dividend yield	1.92	%		2	%		2	%
	Expected life of option	4.1 years			3.7 years			4.2 years

	Risk-free interest rate	0.96	%		0.46	%		1	%
	Expected stock price volatility	36.12	%		37.4	%		47.98	%
Summary of the status of stock options and changes during the period	'
	A summary of the status of our stock options as of December 31, 2013, 2012 and 2011 and changes during the years then ended are presented below:


		2013								2012					2011
		Options				Weighted				Options			Weighted		Options			Weighted
		Outstanding				Average				Outstanding			Average		Outstanding			Average
						Exercise							Exercise					Exercise
						Price							Price					Price
	Balance at beginning of year	1,201,000				$	75.05			1,277,200			$	63.37	1,353,002			$	58.85

	Granted	828,100				87.23				361,331			75.36		212,400			66.42

	Exercised	(223,531		)		53.93				(382,612		)	36.65		(243,901		)	40.48

	Lapsed or cancelled	(40,535		)		83.94				(54,919		)	72.99		(44,301		)	65.89

	Balance at end of year	1,765,034				$	83.24			1,201,000			$	75.05	1,277,200			$	63.37

	Options exercisable at end of year	461,458				$	89.38			479,913			$	86.85	644,429			$	72.31

	Weighted average fair value of options granted during the year	$	18,041,576							$	6,602,967				$	4,647,554

Summary of restricted stock and charges during the period	'
	A summary of our restricted stock as of December 31, 2013, 2012 and 2011 and charges during the years then ended are presented below:


		2013				2012				2011
	Balance at beginning of year	2,804,901				2,912,456				2,728,290

	Granted	192,563				92,729				185,333

	Cancelled	(3,267		)		(200,284		)		(1,167		)
	Balance at end of year	2,994,197				2,804,901				2,912,456

	Vested during the year	21,074				408,800				66,299

	Compensation expense recorded	$	6,713,155			$	6,930,381			$	17,365,401

	Weighted average fair value of restricted stock granted during the year	$	17,386,949			$	7,023,942			$	21,768,084

Accumulated_Other_Comprehensiv2

Accumulated Other Comprehensive Loss of the Company (Tables) (SL Green Realty Corp)	12 Months Ended
	Dec. 31, 2013
SL Green Realty Corp	'
Accumulated Other Comprehensive Income (Loss) [Line Items]	'
Schedule of Accumulated Other Comprehensive Income (Loss)	'
	The following tables set forth the changes in accumulated other comprehensive income (loss) by component as of December 31, 2013, 2012 and 2011:


		Net unrealized loss on derivative instruments (1)			SL Green’s share of joint venture net unrealized loss on derivative instruments (2)			Unrealized gains and loss on marketable securities			Total
	Balance at December 31, 2010	$	(14,009	)	$	(18,303	)	$	9,653		$	(22,659	)

	Other comprehensive (loss) income before reclassifications	(5,019		)	(9,914		)	(4,682		)	(19,615		)
	Amounts reclassified from accumulated other comprehensive income (loss)	1,518			10,816			1,495			13,829

	Balance at December 31, 2011	(17,510		)	(17,401		)	6,466			(28,445		)

	Other comprehensive (loss) income before reclassifications	(1,124		)	(9,098		)	(4,879		)	(15,101		)
	Amounts reclassified from accumulated other comprehensive income (loss)	1,800			10,436			1,723			13,959

	Balance at December 31, 2012	(16,834		)	(16,063		)	3,310			(29,587		)

	Other comprehensive (loss) income before reclassifications	(168		)	6,267			1,474			7,573

	Amounts reclassified from accumulated other comprehensive income (loss)	1,877			4,926			—			6,803

	Balance at December 31, 2013	$	(15,125	)	$	(4,870	)	$	4,784		$	(15,211	)

	___________________________

	-1	Amount reclassified from accumulated other comprehensive income (loss) is included in interest expense in the respective consolidated statements of income. As of December 31, 2013, 2012 and 2011, the deferred net losses from these terminated hedges, which is included in accumulated other comprehensive loss relating to net unrealized loss on derivative instrument, was approximately $13.8 million , $15.0 million and $16.3 million, respectively.

	-2	Amount reclassified from accumulated other comprehensive income (loss) is included in equity in net income from unconsolidated joint ventures in the respective consolidated statements of income.

Accumulated_Other_Comprehensiv3

Accumulated Other Comprehensive Loss of the Operating Partnership (Tables) (SL Green Operating Partnership)	12 Months Ended
	Dec. 31, 2013
SL Green Operating Partnership	'
Accumulated Other Comprehensive Income (Loss) [Line Items]	'
Schedule of Accumulated Other Comprehensive Income (Loss)	'
	The following tables set forth the changes in accumulated other comprehensive income (loss) by component as of December 31, 2013, 2012 and 2011:


		Net unrealized loss on derivative instruments (1)			SLGOP’s share of joint venture net unrealized loss on derivative instruments (2)			Unrealized gains and loss on marketable securities			Total
	Balance at December 31, 2010	$	(14,246	)	$	(18,613	)	$	9,817		$	(23,042	)

	Other comprehensive loss before reclassifications	(5,699		)	(10,273		)	(4,261		)	(20,233		)
	Amounts reclassified from accumulated other comprehensive income (loss)	1,554			11,072			1,530			$	14,156

	Balance at December 31, 2011	$	(18,391	)	$	(17,814	)	$	7,086		$	(29,119	)

	Other comprehensive loss before reclassifications	(912		)	(9,637		)	(5,442		)	(15,991		)
	Amounts reclassified from accumulated other comprehensive income (loss)	1,865			10,811			1,785			14,461

	Balance at December 31, 2012	$	(17,438	)	$	(16,640	)	$	3,429		$	(30,649	)

	Other comprehensive (loss) income before reclassifications	(68		)	6,553			1,497			7,982

	Amounts reclassified from accumulated other comprehensive income (loss)	1,933			5,072			—			7,005

	Balance at December 31, 2013	$	(15,573	)	$	(5,015	)	$	4,926		$	(15,662	)

	___________________________

	-1	Amount reclassified from accumulated other comprehensive income (loss) is included in interest expense in the respective consolidated statements of income. As of December 31, 2013, 2012 and 2011, the deferred net losses from these terminated hedges, which is included in accumulated other comprehensive loss relating to net unrealized loss on derivative instrument, was approximately $14.2 million, $15.5 million and $16.7 million, respectively.

	-2	Amount reclassified from accumulated other comprehensive income (loss) is included in equity in net income from unconsolidated joint ventures in the respective consolidated statements of income.

Fair_Value_Measurements_Tables

Fair Value Measurements (Tables)	12 Months Ended
	Dec. 31, 2013
Fair Value Disclosures [Abstract]	'
Fair Value Measurements, Recurring and Nonrecurring	'
	The following tables set forth the assets and liabilities that we measure at fair value on a recurring and non-recurring basis by their levels in the fair value hierarchy at December 31, 2013 and 2012, respectively (in thousands):


		December 31, 2013
		Total		Level 1		Level 2		Level 3
	Assets:
	Marketable securities	$	32,049	$	4,307	$	24,419	$	3,323

	Liabilities:
	Interest rate swap agreements (included in accrued interest payable and other liabilities)	$	1,329	—		$	1,329	—




		December 31, 2012
		Total		Level 1		Level 2		Level 3
	Assets:
	Marketable securities	$	21,429	$	2,202	$	15,575	$	3,652

	Liabilities:
	Interest rate swap agreements (included in accrued interest payable and other liabilities)	$	1,959	—		$	1,959	—

Fair Value, by Balance Sheet Grouping	'
	The following table provides the carrying value and fair value of these financial instruments as of December 31, 2013 and 2012 (in thousands):


		December 31, 2013				December 31, 2012
		Carrying Value		Fair Value		Carrying Value		Fair Value

	Debt and preferred equity investments	$	1,304,839	-1		$	1,348,434	-1


	Fixed rate debt	$	5,599,960	5,886,980		$	4,922,725	$	5,334,244

	Variable rate debt	1,319,948		1,327,422		1,597,695		1,557,494

		$	6,919,908	$	7,214,402	$	6,520,420	$	6,891,738

	_____________________________________

	-1	Debt and preferred equity investments had an estimated fair value ranging between $1.3 billion and $1.4 billion at both December 31, 2013 and 2012.

Financial_Instruments_Derivati1

Financial Instruments: Derivatives and Hedging (Tables)	12 Months Ended
	Dec. 31, 2013
Derivative Instruments and Hedging Activities Disclosure [Abstract]	'
Schedule of notional and fair value of derivative financial instruments and foreign currency hedges	'
	The following table summarizes the notional and fair value of our consolidated derivative financial instruments at December 31, 2013 based on Level 2 information pursuant to ASC 810-10. The notional value is an indication of the extent of our involvement in these instruments at that time, but does not represent exposure to credit, interest rate or market risks (amounts in thousands).


		Notional				Strike			Effective	Expiration		Balance Sheet Location	Fair
		Value				Rate			Date	Date			Value
	Interest Rate Cap	$	263,426			6	%		Nov-13	Nov-15		Other Assets	$	9

	Interest Rate Cap	137,500				4	%		Oct-13	Sep-15		Other Assets	7

	Interest Rate Swap	30,000				2.295	%		Jul-10	Jun-16		Other Liabilities	(1,293		)

	Interest Rate Swap	8,500				0.74	%		Feb-12	Feb-15		Other Liabilities	(45		)

													$	(1,322	)
Schedule of effect of derivative financial instruments on consolidated statements of income	'
	The following table presents the effect of our derivative financial instruments and our share of our joint ventures' derivative financial instruments that are designated and qualify as hedging instruments on the consolidated statements of income for the years ended December 31, 2013, 2012 and 2011, respectively (in thousands):


			Amount of Gain or (Loss)										Location of Gain or (Loss) Reclassified from Accumulated Other Comprehensive Loss into Income		Amount of Loss						Location of Gain (Loss) Recognized in Income on Derivative	Amount of Gain or (Loss) or
			Recognized in												Reclassified from							Recognized
			Other Comprehensive												Accumulated Other							into Income
			Loss												Comprehensive Loss into Income							(Ineffective Portion)
			(Effective Portion)												(Effective Portion)
			Years Ended												Years Ended							Years Ended
			December 31,												December 31,							December 31,
	Derivative		2013				2012			2011					2013		2012		2011			2013		2012		2011
	Interest Rate Swaps/Caps		$	(68	)		(912		)	$	(5,699	)	Interest expense		$	1,933	1,865		$	1,554	Interest expense	$	3	3		$	(16	)

	Share of unconsolidated joint ventures' derivative instruments		6,553				(9,637		)	(10,273		)	Equity in net income from unconsolidated joint ventures		5,072		10,811		11,072		Equity in net income from unconsolidated joint ventures	—		—		—

			$	6,485			$	(10,549	)	$	(15,972	)			$	7,005	$	12,676	$	12,626		$	3	$	3	$	(16	)

Rental_Income_Tables

Rental Income (Tables)	12 Months Ended
	Dec. 31, 2013
Leases [Abstract]	'
Schedule of approximate future minimum rents to be received over the next five years and thereafter	'
	Approximate future minimum rents to be received over the next five years and thereafter for non-cancelable operating leases in effect at December 31, 2013 for the consolidated properties, including consolidated joint venture properties, and our share of unconsolidated joint venture properties are as follows (in thousands):


		Consolidated		Unconsolidated
		Properties		Properties
	2014	$	992,002	$	245,879

	2015	939,016		195,447

	2016	870,664		214,616

	2017	792,471		201,671

	2018	733,754		202,309

	Thereafter	3,785,428		1,911,877

		$	8,113,335	$	2,971,799

Benefit_Plans_Tables

Benefit Plans (Tables)	12 Months Ended
	Dec. 31, 2013
Compensation and Retirement Disclosure [Abstract]	'
Schedule of contributions made to multi-employer plans	'
	Contributions we made to the multi-employer plans for the years ended December 31, 2013, 2012 and 2011 are included in the table below (in thousands):


	Benefit Plan	2013		2012		2011
	Pension Plan	$	2,765	$	2,506	$	2,264

	Health Plan	8,522		8,020		6,919

	Other plans	6,006		6,025		5,111

	Total plan contributions	$	17,293	$	16,551	$	14,294

Commitments_and_Contingencies_

Commitments and Contingencies (Tables)	12 Months Ended
	Dec. 31, 2013
Commitments and Contingencies Disclosure [Abstract]	'
Schedule of future minimum lease payments under capital leases and non cancellable operating leases	'
	The following is a schedule of future minimum lease payments under capital leases and noncancellable operating leases with initial terms in excess of one year as of December 31, 2013 (in thousands):


	December 31,	Capital lease			Non-cancellable
					operating leases
	2014	$	2,292		$	35,356

	2015	2,363			35,511

	2016	2,531			35,943

	2017	2,652			36,176

	2018	2,652			36,176

	Thereafter	353,826			1,409,808

	Total minimum lease payments	366,316			$	1,588,970

	Less amount representing interest	(318,645		)
	Present value of net minimum lease payments	$	47,671

Segment_Information_Tables

Segment Information (Tables)	12 Months Ended
	Dec. 31, 2013
Segment Reporting [Abstract]	'
Schedule of selected results of operations and selected asset information	'
	Selected results of operations for the years ended December 31, 2013, 2012 and 2011, and selected asset information as of December 31, 2013 and 2012, regarding our operating segments are as follows (in thousands):


		Real			Debt and Preferred		Total
		Estate			Equity		Company
		Segment			Segment
	Total revenues
	Years ended:
	31-Dec-13	$	1,275,234		$	193,843	$	1,469,077

	31-Dec-12	1,263,574			119,155		1,382,729

	31-Dec-11	1,126,441			120,418		1,246,859

	Income from continuing operations before equity in net gain on sale of interest in unconsolidated joint venture/real estate and purchase price fair value adjustment
	Years ended:
	31-Dec-13	$	(27,024	)	$	160,386	$	133,362

	31-Dec-12	60,455			92,946		153,401

	31-Dec-11	20,327			101,037		121,364

	Total assets
	As of:
	31-Dec-13	$	13,641,727		$	1,317,274	$	14,959,001

	31-Dec-12	13,028,406			1,357,890		14,386,296

Schedule of reconciliation of income from continuing operations to net income attributable to SL Green common stockholders	'
	The table below reconciles income from continuing operations to net income for the years ended December 31, 2013, 2012 and 2011 (in thousands):


		Years ended December 31,
		2013			2012		2011
	Income from continuing operations before equity in net gain on sale of interest in unconsolidated joint venture/real estate and purchase price fair value adjustment	$	133,362		$	153,401	$	121,364

	Equity in net gain on sale of interest in unconsolidated joint venture/real estate	3,601			37,053		2,918

	Purchase price fair value adjustment	(2,305		)	—		498,195

	Income from continuing operations	134,658			190,454		622,477

	Net income from discontinued operations	1,725			12,619		8,560

	Gain on sale of discontinued operations	14,900			6,627		46,085

	Net income	$	151,283		$	209,700	$	677,122

Quarterly_Financial_Data_unaud1

Quarterly Financial Data (unaudited) (Tables)	12 Months Ended
	Dec. 31, 2013
SL Green Realty Corp	'
Condensed Income Statements, Captions [Line Items]	'
Schedule of Quarterly Financial Information	'
	Summarized quarterly financial data for the years ended December 31, 2013 and 2012, which is reflective of the reclassification of the properties sold or held during 2013 and 2012 as discontinued operations (see Note 4, "Property Dispositions"), was as follows (in thousands, except for per share amounts):


	2013 Quarter Ended	December 31			September 30			June 30			March 31
	Total revenues	$	374,699		$	363,765		$	365,145		$	365,468

	Income from continuing before equity in net gain (loss) on sale of interest in unconsolidated joint venture/real estate, purchase price fair value adjustment, gain (loss) on early extinguishment of debt, loss on sale of investment in marketable securities, net of noncontrolling interests	$	33,314		$	25,924		$	34,019		$	42,776

	Equity in net gain (loss) on sale of interest in unconsolidated joint venture/real estate	7,538			(354		)	(3,583		)	—

	Purchase price fair value adjustment	—			—			(2,305		)	—

	Gain (loss) on early extinguishment of debt	5			—			(10		)	(18,513		)

	Loss on sale of investment in marketable securities	—			—			(8		)	(57		)

	Net income (loss) from discontinued operations	—			1,406			(678		)	997

	Gain on sale of discontinued operations	—			13,787			—			1,113

	Net income attributable to SL Green	40,857			40,763			27,435			26,316

	Preferred stock redemption costs	—			—			(12,160		)	—

	Perpetual preferred stock dividends	(3,737		)	(3,738		)	(6,999		)	(7,407		)
	Net income attributable to SL Green common stockholders	$	37,120		$	37,025		$	8,276		$	18,909

	Net income attributable to common stockholders per common share—basic	$	0.39		$	0.4		$	0.09		$	0.21

	Net income attributable to common stockholders per common share—diluted	$	0.39		$	0.4		$	0.09		$	0.21



	2012 Quarter Ended	December 31			September 30			June 30			March 31
	Total revenues	$	346,599		$	357,011		$	344,535		$	334,585

	Income from continuing before equity in net gain (loss) on sale of interest in unconsolidated joint venture/real estate, loss on early extinguishment of debt, gain on sale of investment in marketable securities, net of noncontrolling interests	$	2,624		$	27,276		$	94,362		$	17,882

	Equity in net gain (loss) on sale of interest in unconsolidated joint venture/ real estate	19,277			(4,807		)	15,323			7,260

	Loss on early extinguishment of debt	(6,978		)	—			—			—

	Gain on sale of investment in marketable securities	2,703			2,237			—			—

	Net income from discontinued operations	9,737			951			899			1,032

	Gain on sale of discontinued operations	—			—			—			6,627

	Net income attributable to SL Green	27,363			25,657			110,584			32,801

	Preferred stock redemption costs	—			(10,010		)	—			—

	Perpetual preferred stock dividends	(7,407		)	(7,915		)	(7,544		)	(7,545		)
	Net income attributable to SL Green common stockholders	$	19,956		$	7,732		$	103,040		$	25,256

	Net income attributable to common stockholders per common share—basic	$	0.22		$	0.09		$	1.15		$	0.29

	Net income attributable to common stockholders per common share—diluted	$	0.22		$	0.09		$	1.14		$	0.29

SL Green Operating Partnership	'
Condensed Income Statements, Captions [Line Items]	'
Schedule of Quarterly Financial Information	'
	Summarized quarterly financial data for the years ended December 31, 2013 and 2012, which is reflective of the reclassification of the properties sold or held during 2013 and 2012 as discontinued operations (see Note 4, "Property Dispositions"), was as follows (in thousands, except for per share amounts):


	2013 Quarter Ended	December 31			September 30			June 30			March 31
	Total revenues	$	374,699		$	363,765		$	365,145		$	365,468

	Income from continuing before equity in net gain (loss) on sale of interest in unconsolidated joint venture/real estate, purchase price fair value adjustment, gain (loss) on early extinguishment of debt, loss on sale of investment in marketable securities, net of noncontrolling interests	$	34,428		$	27,034		$	34,263		$	43,331

	Equity in net (loss) gain on sale of interest in unconsolidated joint venture/ real estate	7,538			(354		)	(3,583		)	—

	Purchase price fair value adjustment	—			—			(2,305		)	—

	Gain (loss) on early extinguishment of debt	5			—			(10		)	(18,513		)

	Loss on sale of investment in marketable securities	—			—			(8		)	(57		)

	Net income (loss) from discontinued operations	—			1,406			(678		)	997

	Gain on sale of discontinued operations	—			13,787			—			1,113

	Net income attributable to SLGOP	41,971			41,873			27,679			26,871

	Preferred unit redemption costs	—			—			(12,160		)	—

	Perpetual preferred units distributions	(3,737		)	(3,738		)	(6,999		)	(7,407		)
	Net income attributable to SLGOP common unitholders	$	38,234		$	38,135		$	8,520		$	19,464

	Net income attributable to common unitholders per common unit—basic	$	0.39		$	0.4		$	0.09		$	0.21

	Net income attributable to common unitholders per common unit—diluted	$	0.39		$	0.4		$	0.09		$	0.21



	2012 Quarter Ended	December 31			September 30			June 30			March 31
	Total revenues	$	346,598		$	357,011		$	344,535		$	334,585

	Income from continuing before equity in net gain (loss) on sale of interest in unconsolidated joint venture/real estate, loss on early extinguishment of debt, gain on sale of investment in marketable securities, net of noncontrolling interests	$	3,345		$	27,843		$	97,783		$	18,770

	Equity in net gain (loss) on sale of interest in unconsolidated joint venture/ real estate	19,277			(4,807		)	15,323			7,260

	Loss on early extinguishment of debt	(6,978		)	—			—			—

	Gain on sale of investment in marketable securities	2,703			2,237			—			—

	Net income from discontinued operations	9,737			951			899			1,032

	Gain on sale of discontinued operations	—			—			—			6,627

	Net income attributable to SLGOP	28,084			26,224			114,005			33,689

	Preferred unit redemption costs	—			(10,010		)	—			—

	Perpetual preferred distributions	(7,407		)	(7,915		)	(7,544		)	(7,545		)
	Net income attributable to SLGOP common unitholders	$	20,677		$	8,299		$	106,461		$	26,144

	Net income attributable to common unitholders per common unit—basic	$	0.22		$	0.09		$	1.15		$	0.29

	Net income attributable to common unitholders per common unit—diluted	$	0.22		$	0.09		$	1.14		$	0.29

Organization_and_Basis_of_Pres2

Organization and Basis of Presentation (Details) (SL Green Operating Partnership)	1 Months Ended
	Jun. 30, 1997	Dec. 31, 2013	Dec. 31, 2012
Organization	'	'	'
Percentage of ownership in SL Green Management LLC owned by operating partnership (percent)	100.00%	'	'
Noncontrolling interest in the operating partnership (as a percent)	'	2.96%	2.94%
Service Corporation	'	'	'
Organization	'	'	'
Economic interest in variable interest entity (as a percent)	95.00%	'	'

Organization_and_Basis_of_Pres3

Organization and Basis of Presentation (Details 2) (USD $)	12 Months Ended
In Thousands, except Share data, unless otherwise specified	Dec. 31, 2013		Dec. 31, 2012
	sqft
	building
Real estate properties	'		'
Number of buildings (buildings)	62		'
Square Feet (sqft)	28,549,979		'
Weighted Average Occupancy (as a percent)	92.50%	[1]	'
Debt and preferred equity investments	$1,304,839		$1,348,434
Number of shares to be received on redemption of one unit of limited partnership interests (shares)	1		'
Stand-alone retail properties	'		'
Real estate properties	'		'
Number of buildings (buildings)	16		'
Square Feet (sqft)	875,800		'
Development	'		'
Real estate properties	'		'
Number of buildings (buildings)	20		'
Square Feet (sqft)	3,230,800		'
Residential properties	'		'
Real estate properties	'		'
Number of buildings (buildings)	4		'
Square Feet (sqft)	719,900		'
Number of units (unit)	801		'
Land	'		'
Real estate properties	'		'
Square Feet (sqft)	961,400		'
Number of properties (properties)	2		'
Managed office properties	'		'
Real estate properties	'		'
Square Feet (sqft)	626,400		'
Number of office properties managed (property)	2		'
Manhattan \| Consolidated properties	'		'
Real estate properties	'		'
Number of buildings (buildings)	23		'
Square Feet (sqft)	17,306,045		'
Weighted Average Occupancy (as a percent)	94.50%	[1]	'
Manhattan \| Unconsolidated properties	'		'
Real estate properties	'		'
Number of buildings (buildings)	9		'
Square Feet (sqft)	5,934,434		'
Weighted Average Occupancy (as a percent)	96.60%	[1]	'
Suburban \| Consolidated properties	'		'
Real estate properties	'		'
Number of buildings (buildings)	26		'
Square Feet (sqft)	4,087,400		'
Weighted Average Occupancy (as a percent)	79.80%	[1]	'
Suburban \| Unconsolidated properties	'		'
Real estate properties	'		'
Number of buildings (buildings)	4		'
Square Feet (sqft)	1,222,100		'
Weighted Average Occupancy (as a percent)	87.20%	[1]	'
Southern California \| Office properties	'		'
Real estate properties	'		'
Number of buildings (buildings)	52		'
Square Feet (sqft)	3,654,300		'
Number of properties (properties)	28		'

[1]	The weighted average occupancy represents the total leased square feet divided by total available rentable square feet.

Significant_Accounting_Policie3

Significant Accounting Policies (Details) (USD $)	Dec. 31, 2013	Dec. 31, 2012
In Thousands, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012
Principles of Consolidation	'	'
Commercial real estate properties	$10,687,540	$10,269,630
Mortgages and other loans payable	4,860,578	4,615,464
Consolidated VIEs	'	'
Principles of Consolidation	'	'
Commercial real estate properties	605,900	607,400
Mortgages and other loans payable	$370,900	$379,600

Significant_Accounting_Policie4

Significant Accounting Policies (Details 2) (USD $)

12 Months Ended

1 Months Ended

12 Months Ended

Dec. 31, 2013

Dec. 31, 2012

Dec. 31, 2011

Dec. 31, 2013

Jun. 30, 2013

Apr. 30, 2013

Dec. 31, 2013

Other intangible assets

Above-market leases

In-place leases

Acquired below-market leases, net of acquired above-market leases

All other identifiable assets

300 Main Street

16 Court Street

Buildings (fee ownership)

Building (leasehold interest)

Furniture and fixtures

Building

Minimum

Maximum

Minimum

Maximum

Minimum

Maximum

Minimum

Maximum

Minimum

Maximum

Investment in Commercial Real Estate Properties

Estimated useful life

'40 years

'4 years

'7 years

'3 years

'40 years

Depreciation expense (including amortization of the capital lease asset)

$309,400,000

$301,000,000

$249,000,000

Impairment charges recorded

5,800,000

2,200,000

Period from cessation of major construction to consider construction project as complete and available for occupancy, maximum

'1 year

Purchase price fair value adjustment

-2,305,000

498,195,000

-2,300,000

Estimated useful life of other intangible assets

'1 year

'14 years

'1 year

'14 years

'1 year

'14 years

Increase in rental revenue from amortization of acquired leases

13,500,000

10,400,000

19,600,000

Write-off of above and in place market leases

6,800,000

Reduction in interest expense from amortization of above-market rate mortgages

-5,300,000

-1,800,000

-5,900,000

Identified intangible assets (included in other assets):

Gross amount

746,704,000

725,861,000

Accumulated amortization

-343,339,000

-263,107,000

Net

403,365,000

462,754,000

Identified intangible liabilities (included in deferred revenue):

Gross amount

671,380,000

651,921,000

Accumulated amortization

-429,138,000

-357,225,000

Net

242,242,000

294,696,000

Estimated annual amortization

2014

-1,984,000

14,938,000

2015

-2,464,000

10,387,000

2016

-4,632,000

6,878,000

2017

-3,758,000

5,482,000

2018

($4,763,000)

$3,978,000

Significant_Accounting_Policie5

Significant Accounting Policies (Details 3) (USD $)	3 Months Ended								12 Months Ended
Significant Accounting Policies (Details 3) (USD $)	Dec. 31, 2013	Sep. 30, 2013	Jun. 30, 2013	Mar. 31, 2013	Dec. 31, 2012	Sep. 30, 2012	Jun. 30, 2012	Mar. 31, 2012	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Investment in Marketable Securities	'	'	'	'	'	'	'	'	'	'	'
Marketable securities	$32,049,000	'	'	'	$21,429,000	'	'	'	$32,049,000	$21,429,000	'
Net proceeds on sale of marketable securities	'	'	'	'	'	'	'	'	0	6,800,000	6,200,000
Realized gain (loss) on investment in marketable securities	0	0	-8,000	-57,000	2,703,000	2,237,000	0	0	0	4,900,000	4,500,000
Proceeds from sale and maturity of marketable securities	'	'	'	'	'	'	'	'	2,370,000	11,070,000	40,248,000
Commercial mortgage-backed securities	'	'	'	'	'	'	'	'	'	'	'
Investment in Marketable Securities	'	'	'	'	'	'	'	'	'	'	'
Cost basis	23,000,000	'	'	'	13,700,000	'	'	'	23,000,000	13,700,000	'
Rake bonds	'	'	'	'	'	'	'	'	'	'	'
Investment in Marketable Securities	'	'	'	'	'	'	'	'	'	'	'
Cost basis	3,600,000	'	'	'	3,700,000	'	'	'	3,600,000	3,700,000	'
Realized gain (loss) on investment in marketable securities	'	'	'	'	'	'	'	'	'	'	400,000
Proceeds from sale and maturity of marketable securities	'	'	'	'	'	'	'	'	'	'	22,500,000
Level 1 \| Equity marketable securities	'	'	'	'	'	'	'	'	'	'	'
Investment in Marketable Securities	'	'	'	'	'	'	'	'	'	'	'
Marketable securities	4,307,000	'	'	'	2,202,000	'	'	'	4,307,000	2,202,000	'
Level 2 \| Commercial mortgage-backed securities	'	'	'	'	'	'	'	'	'	'	'
Investment in Marketable Securities	'	'	'	'	'	'	'	'	'	'	'
Marketable securities	24,419,000	'	'	'	15,575,000	'	'	'	24,419,000	15,575,000	'
Level 3 \| Rake bonds	'	'	'	'	'	'	'	'	'	'	'
Investment in Marketable Securities	'	'	'	'	'	'	'	'	'	'	'
Marketable securities	3,323,000	'	'	'	3,652,000	'	'	'	3,323,000	3,652,000	'
Fair Value	'	'	'	'	'	'	'	'	'	'	'
Investment in Marketable Securities	'	'	'	'	'	'	'	'	'	'	'
Marketable securities	$32,049,000	'	'	'	$21,429,000	'	'	'	$32,049,000	$21,429,000	'

Significant_Accounting_Policie6

Significant Accounting Policies (Details 4) (USD $)	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011	investment
Investment in Unconsolidated Joint Ventures	'	'	'	'
Impairment charges recorded	'	'	$5,800,000	'
Number of investments with other than temporary impairment (investment)	'	'	'	1
Deferred Lease Costs	'	'	'	'
Portion of compensation capitalized	12,400,000	11,000,000	9,600,000	'
Estimated average lease term	'7 years	'	'	'
Joint venture	'	'	'	'
Investment in Unconsolidated Joint Ventures	'	'	'	'
Recourse debt	$218,400,000	'	'	'
Number of joint ventures with debt recourse (joint ventures)	2	'	'	'

Significant_Accounting_Policie7

Significant Accounting Policies (Details 5) (USD $)	12 Months Ended
Significant Accounting Policies (Details 5) (USD $)	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Reserve for Possible Credit Losses	'	'	'
Days past due for income recognition on debt and preferred equity investments to be suspended	'90 days	'	'
Loan loss reserves and charge offs	$0	$564,000	$6,722,000
Recoveries recorded	0	2,436,000	4,370,000
Income taxes	'	'	'
Federal, state and local tax provision	4,400,000	0	0
Debt and Preferred Equity Investments Held to Maturity	'	'	'
Reserve for Possible Credit Losses	'	'	'
Loan loss reserves and charge offs	'	$3,000,000	$10,900,000

Significant_Accounting_Policie8

Significant Accounting Policies (Details 6)	12 Months Ended
Significant Accounting Policies (Details 6)	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Credit concentration	'	'	'
Concentration of Credit Risk	'	'	'
Number of investments (investment)	3	'	'
Workforce concentration	'	'	'
Concentration of Credit Risk	'	'	'
Number of collective bargaining agreements (agreement)	3	'	'
Annualized rent \| Customer concentration	'	'	'
Concentration of Credit Risk	'	'	'
Number of tenants (tenants)	3	'	'
Maximum percentage of annualized rent for any one tenant not individually disclosed (percent)	2.20%	'	'
Annualized rent \| 1515 Broadway \| Customer concentration	'	'	'
Concentration of Credit Risk	'	'	'
Percentage of concentration (percent)	10.60%	10.20%	10.30%
Annualized rent \| 919 Third Avenue \| Customer concentration	'	'	'
Concentration of Credit Risk	'	'	'
Percentage of concentration (percent)	7.80%	8.00%	8.30%
Annualized rent \| 1185 Avenue of the Americas \| Customer concentration	'	'	'
Concentration of Credit Risk	'	'	'
Percentage of concentration (percent)	7.70%	7.10%	7.20%
Annualized rent \| One Madison Avenue \| Customer concentration	'	'	'
Concentration of Credit Risk	'	'	'
Percentage of concentration (percent)	6.40%	6.20%	6.50%
Annualized rent \| Tenant 1 \| Customer concentration	'	'	'
Concentration of Credit Risk	'	'	'
Percentage of concentration (percent)	7.50%	'	'
Annualized rent \| Tenant 2 \| Customer concentration	'	'	'
Concentration of Credit Risk	'	'	'
Percentage of concentration (percent)	6.60%	'	'
Annualized rent \| Tenant 3 \| Customer concentration	'	'	'
Concentration of Credit Risk	'	'	'
Percentage of concentration (percent)	6.10%	'	'
Revenue earned on debt and preferred equity investments \| Credit concentration	'	'	'
Concentration of Credit Risk	'	'	'
Minimum revenue on debt and preferred equity investments (percent)	10.00%	'	'
Collective bargaining arrangements \| Workforce concentration	'	'	'
Concentration of Credit Risk	'	'	'
Percentage of concentration (percent)	73.90%	'	'
Collective bargaining arrangements which expires in 2015 \| Workforce concentration	'	'	'
Concentration of Credit Risk	'	'	'
Percentage of concentration (percent)	77.30%	'	'

Property_Acquisitions_Details

Property Acquisitions (Details) (USD $)

12 Months Ended

1 Months Ended

Dec. 31, 2013

Dec. 31, 2012

Dec. 31, 2011

Nov. 30, 2013

Apr. 30, 2013

Mar. 31, 2013

Dec. 31, 2012

Oct. 31, 2012

Sep. 30, 2012

Jun. 30, 2012

Sep. 30, 2013

Jun. 30, 2012

Oct. 31, 2012

Jan. 31, 2012

Nov. 30, 2011

31-May-11

Apr. 30, 2011

Jan. 31, 2011

Mar. 31, 2013

Nov. 30, 2013

Mar. 31, 2013

Nov. 30, 2013

Mar. 31, 2013

sqft

315 West 33rd Street

Retail Properties on Fifth Avenue

16 Court Street

248-252 Bedford Avenue

131-137 Spring Street

985-987 Third Avenue

1080 Amsterdam Avenue

635-641 Sixth Avenue

304 Park Avenue

Stonehenge Properties

Manhattan

Retail properties

Multifamily properties

51 East 42nd Street

180 Maiden Lane

110 East 42nd Street

1515 Broadway

521 Fifth Avenue

LIBOR

Mixed-Use Residential and Commercial Property

Apartments

Commercial

Townhouses

sqft

unit

sqft

Series G Preferred Units

property

sqft

Series H Preferred Units

sqft

248-252 Bedford Avenue

315 West 33rd Street

248-252 Bedford Avenue

315 West 33rd Street

248-252 Bedford Avenue

unit

sqft

unit

sqft

unit

sqft

Property Acquisitions

Area of property (sqft)

28,549,979

66,692

318,000

68,000

42,000

82,250

267,000

215,000

488,000

142,000

1,100,000

205,000

1,750,000

460,000

492,987

270,132

Business Combination, Consideration Transferred

$146,000,000

$4,000,000

$122,300,000

$18,000,000

$173,000,000

$135,000,000

$193,100,000

$80,000,000

Mortgage encumbering the property

84,600,000

47,600,000

Purchase price fair value adjustment

-2,305,000

498,195,000

-2,300,000

Number of units (unit)

385

333

Term

'5 years

'12 years

'5 years

'2 years

Face amount of loan

22,000,000

344,200,000

16,000,000

150,000,000

140,000,000

Interest rate added to base rate (as a percent)

2.00%

2.25%

Stated interest rate of preferred partnership units issued (as a percent)

90.00%

6.00%

Recognized Identifiable Assets Acquired and Liabilities Assumed

Land

116,033,000

[1]

43,800,000

[1]

19,217,000

10,865,000

27,021,000

5,400,000

69,848,000

54,189,000

65,533,000

44,095,000

191,523,000

34,000,000

462,700,000

110,100,000

Building and building leasehold

270,742,000

[1]

102,200,000

[1]

63,210,000

44,035,000

105,342,000

12,600,000

104,474,000

75,619,000

128,457,000

33,470,000

233,230,000

46,411,000

707,938,000

146,686,000

Above market lease value

[1]

5,122,000

179,000

2,824,000

594,000

5,616,000

7,944,000

823,000

18,298,000

3,318,000

Acquired in-place leases

[1]

9,422,000

7,046,000

7,727,000

8,265,000

9,573,000

4,333,000

29,948,000

5,396,000

98,661,000

23,016,000

Other assets, net of other liabilities

[1]

3,380,000

2,190,000

27,127,000

Assets acquired

386,775,000

[1]

146,000,000

[1]

100,351,000

54,900,000

139,588,000

18,000,000

182,049,000

140,897,000

206,347,000

87,514,000

462,645,000

86,630,000

1,314,724,000

283,120,000

Fair value adjustment to mortgage note payable

-3,693,000

Mark-to-market assumed debt

[1]

294,000

Below market lease value

[1]

3,885,000

17,288,000

9,049,000

5,897,000

13,239,000

7,514,000

20,320,000

2,326,000

84,417,000

25,977,000

Liabilities assumed

[1]

4,179,000

17,288,000

9,049,000

5,897,000

13,239,000

7,514,000

20,320,000

2,326,000

80,724,000

25,977,000

Purchase price allocation

386,775,000

[1]

146,000,000

[1]

96,172,000

54,900,000

122,300,000

18,000,000

173,000,000

135,000,000

193,108,000

80,000,000

442,325,000

84,304,000

1,234,000,000

257,143,000

386,800,000

Net consideration funded by us at closing, excluding consideration financed by debt

386,775,000

[1]

146,000,000

[1]

4,000,000

21,782,000

122,300,000

18,000,000

173,000,000

135,000,000

78,121,000

81,632,000

81,835,000

2,744,000

259,228,000

70,000,000

Equity and/or debt investment held

[1]

13,835,000

2,000,000

16,000,000

40,942,000

41,432,000

Debt assumed

[1]

84,642,000

65,000,000

458,767,000

140,000,000

Term of lease

'99 years

Number of properties (units)

Consideration in cash

102,000,000

41,000,000

Number of properties acquired (properties)

Interest rate (as a percent)

4.50%

Fixed rate debt

4,130,629,000

3,457,769,000

8,500,000

100,000,000

Interest rate, fixed rate debt (as a percent)

3.80%

4.10%

Ownership interest in consolidated joint venture (as a percent)

80.00%

Stake in the joint venture (as a percent)

49.90%

Value of preferred operating partnership units issued

33,000,000

31,700,000

Consolidated interests in acquiree

442,300,000

1,200,000,000

245,700,000

Debt assumed

458,800,000

Purchase price fair value adjustment recognized

8,300,000

475,100,000

13,800,000

Mortgage on properties assumed

280,000,000

Senior mezzanine loan

22,000,000

344,200,000

16,000,000

150,000,000

140,000,000

Economic Interest (as a percent)

31.50%

Remaining ownership interest acquired (as a percent)

49.90%

Cash and other assets

4,500,000

Fee interest in the property acquired

$15,000,000

[1]

We are currently in the process of analyzing the purchase price allocation and, as such, we have not allocated any value to intangible assets such as above- and below-market lease or in-place leases.

Property_Dispositions_Details

Property Dispositions (Details) (USD $)

3 Months Ended

12 Months Ended

1 Months Ended

Dec. 31, 2013

Sep. 30, 2013

Jun. 30, 2013

Mar. 31, 2013

Dec. 31, 2012

Sep. 30, 2012

Jun. 30, 2012

Mar. 31, 2012

Dec. 31, 2013

Dec. 31, 2012

Dec. 31, 2011

Sep. 30, 2013

Aug. 30, 2013

Feb. 28, 2013

Feb. 29, 2012

31-May-11

sqft

300 Main Street

333 West 34th Street

44th West 55th Street

292 Madison Avenue

Property at 28 West 44th Street

sqft

Property Dispositions and Assets Held for Sale

Consideration for sale of property

$13,500,000

$220,300,000

$6,300,000

$85,000,000

$161,000,000

Asset impairment charges

2,200,000

Gain on sale of property

13,787,000

1,113,000

6,627,000

14,900,000

6,627,000

46,085,000

13,800,000

1,100,000

6,600,000

46,100,000

Employee compensation award

3,000,000

1,500,000

Area of property (sqft)

28,549,979

359,000

Revenues

Rental revenue

10,656,000

18,651,000

27,093,000

Escalation and reimbursement revenues

1,292,000

2,263,000

2,924,000

Other income

8,000

8,190,000

121,000

Total revenues

11,956,000

29,104,000

30,138,000

Operating expenses

3,643,000

6,646,000

7,424,000

Real estate taxes

765,000

1,224,000

2,334,000

Interest expense, net of interest income

461,000

2,082,000

4,922,000

Depreciable real estate reserves

2,150,000

Transaction related costs

160,000

1,000

Depreciation and amortization

3,212,000

6,373,000

6,715,000

Amortization of deferred financing costs

182,000

Total expenses

10,231,000

16,485,000

21,578,000

Net income from discontinued operations

$1,406,000

($678,000)

$997,000

$9,737,000

$951,000

$899,000

$1,032,000

$1,725,000

$12,619,000

$8,560,000

Debt_and_Preferred_Equity_Inve2

Debt and Preferred Equity Investments (Details) (USD $)

12 Months Ended

1 Months Ended

0 Months Ended

1 Months Ended

12 Months Ended

1 Months Ended

Dec. 31, 2013

Dec. 31, 2012

Dec. 31, 2011

Dec. 31, 2010

Dec. 31, 2013

Dec. 31, 2012

Dec. 31, 2013

Dec. 31, 2012

Dec. 31, 2013

Dec. 31, 2012

Dec. 31, 2013

Dec. 31, 2012

Dec. 31, 2013

Dec. 31, 2012

Dec. 31, 2013

Dec. 31, 2012

Dec. 31, 2013

Dec. 31, 2012

Dec. 31, 2013

Dec. 31, 2012

Jan. 31, 2013

Dec. 31, 2013

Dec. 31, 2012

Dec. 31, 2013

Dec. 31, 2012

Dec. 31, 2013

Dec. 31, 2012

Dec. 31, 2013

Dec. 31, 2012

31-May-13

Nov. 30, 2012

Dec. 31, 2013

Dec. 31, 2012

Dec. 31, 2013

Dec. 31, 2012

Dec. 31, 2013

Dec. 31, 2012

Dec. 31, 2013

Dec. 31, 2012

Dec. 31, 2013

Dec. 31, 2012

Dec. 31, 2013

Dec. 31, 2012

Dec. 31, 2013

Dec. 31, 2012

Dec. 31, 2013

Dec. 31, 2012

Dec. 31, 2013

Dec. 31, 2012

Dec. 31, 2013

Dec. 31, 2012

Dec. 31, 2013

Dec. 31, 2012

Dec. 31, 2013

Jun. 30, 2013

Dec. 31, 2013

Dec. 31, 2012

Dec. 31, 2013

Dec. 31, 2012

Jun. 30, 2013

Dec. 31, 2013

Dec. 31, 2012

Dec. 31, 2013

Dec. 31, 2012

Dec. 31, 2013

Dec. 31, 2012

Dec. 31, 2013

Dec. 31, 2012

Dec. 31, 2013

Dec. 31, 2012

Dec. 31, 2013

Dec. 31, 2012

Dec. 31, 2013

Oct. 30, 2013

Nov. 30, 2013

Jun. 30, 2013

Oct. 31, 2013

Nov. 30, 2013

Jun. 30, 2013

Debt investment

Total fixed rate

Total floating rate

Loan participations and assignments

Mortgages

Junior Participation, March 2015

Mezzanine Loan, February 2016

Mortgage/Mezzanine Loan, May 2016

Mezzanine Loan, May 2016

Junior Participation, June 2016

Mezzanine Loan, November 2016

Mortgage/Mezzanine Loan, March 2017

Mezzanine Loan, June 2017

Other Loan, September 2021

Mezzanine Loan, November 2023

Mortgage Loan

Mezzanine Loan, November 2016

Mortgage Loan

Junior Participation, February 2014

Junior Participation, June, 2013

Mortgage/Mezzanine Loan, July 2014

Mezzanine Loan, August 2014

Mezzanine Loan, October 2014

Mortgage Loan, December 2014

Mezzanine Loan, September 2015

Mezzanine Loan, December 2015

Mezzanine Loan, March 2016

Mezzanine Loan, June 2016

Mezzanine Loan, July 2016

Mezzanine Loan, December 2016

Mortgage/Mezzanine Loan, July 2018

Mezzanine Loan

Mortgage/Mezzanine Loan

Mezzanine Loan, June 2017

Mezzanine Loan, November 2023

Mezzanine Loan, June 2016

Mezzanine Loan, June 2017

Mezzanine Loan, November 2023

Mezzanine Loan, June 2016

Debt investment

Increase in debt and preferred equity investments (net of discounts), including investments classified as held-for-sale

$601,300,000

$672,900,000

Decrease in debt and preferred equity investments (net of discounts), including investments classified as held-for-sale

644,900,000

298,700,000

Loan loss reserves recorded

3,000,000

Aggregate weighted average current yield (as a percent)

11.47%

Senior Financing

5,196,398,000

2,980,960,000

398,500,000

205,000,000

166,710,000

177,000,000

133,000,000

165,000,000

1,109,000,000

[1]

521,750,000

[2]

15,000,000

90,000,000

[3]

[4]

2,215,438,000

163,500,000

[5]

80,932,000

[6]

57,750,000

[7]

330,000,000

180,000,000

89,956,000

[8]

110,000,000

92,711,000

[9]

92,711,000

[9]

775,000,000

160,000,000

[10]

87,300,000

33,289,000

[11]

55,000,000

Carrying Value, Net of Discounts

385,604,000

583,565,000

11,856,000

68,319,000

66,307,000

44,742,000

44,013,000

15,012,000

15,906,000

49,000,000

71,312,000

70,967,000

80,983,000

[1]

115,804,000

[1]

20,954,000

[2]

3,500,000

19,926,000

[3]

[4]

218,068,000

[4]

Debt and preferred equity investments

1,304,839,000

1,348,434,000

550,871,000

433,290,000

25,725,000

[5]

14,745,000

24,046,000

[6]

10,873,000

[7]

10,869,000

[7]

131,724,000

131,231,000

59,892,000

59,739,000

38,549,000

[8]

34,444,000

[8]

30,000,000

49,110,000

27,662,000

[9]

27,662,000

[9]

55,336,000

[9]

72,823,000

22,526,000

[10]

7,624,000

[10]

25,590,000

34,761,000

11,798,000

[11]

20,553,000

37,288,000

47,253,000

Carrying value, net of discounts

936,475,000

1,016,855,000

Loan loss reserve

-1,000,000

-7,000,000

-50,175,000

-61,361,000

-1,000,000

[12]

-7,000,000

[12]

Total, net of reserve

935,475,000

1,009,855,000

Percentage of loan sold (percent)

50.00%

Amount recognized from sale of loan

57,800,000

6,400,000

Gain (Loss) on Sales of Loans, Net

12,900,000

Loans acquired

219,000,000

82,500,000

25,000,000

30,000,000

Additional funds committed

11,400,000

900,000

11,200,000

22,100,000

300,000

20,000,000

Payments for origination

56,300,000

Face amount of loan

85,000,000

30,000,000

Additional funding provided

8,500,000

Repayments of loan

15,000,000

Loan Participation Amount Included in Other asset and Other Liabilities

$7,400,000

$41,300,000

$5,000,000

$7,400,000

[1]

Interest is added to the principal balance for this accrual only loan. In January 2013, we sold 50% of the mezzanine loan for $57.8 million and recognized additional income of $12.9 million, which is included in investment income on the consolidated statements of income.

[2]

In October 2013, we entered into a loan participation agreement in the amount of $41.3 million on a $82.5 million mortgage. As a result of the transfer not meeting the conditions for sale accounting, the portion that was participated out has been recorded in other assets and other liabilities in the accompanying consolidated balance sheet. In addition, as of December 31, 2013, we were committed to fund an additional $20.0 million in connection with this loan.

[3]

In November 2013, we entered into a loan participation agreement in the amount of $5.0 million on a $25.0 million mortgage. As a result of the transfer not meeting the conditions for sale accounting, the portion that was participated out has been recorded in other assets and other liabilities in the consolidated balance sheets.

[4]

In November 2012, we acquired this nonperforming loan with an original balance of $219.0 million subject to interest based on default rate. In connection with the repayment of the loan in May 2013, we recognized additional income of $6.4 million, which is included in investment income on our consolidated statements of income.

[5]

As of DecemberB 31, 2013, we were committed to fund an additional $11.4 million in connection with this loan.

[6]

As of DecemberB 31, 2013, we were committed to fund an additional $0.9 million in connection with this loan.

[7]

In December 2013, the loan was extended to June 2014.

[8]

As of DecemberB 31, 2013, we were committed to fund an additional $11.2 million in connection with this loan.

[9]

We funded $56.3 million at origination. In June 2013, we sold 50% of our interest in the $85.0 million mezzanine loan. Additionally, in December 2013 we closed on an $8.5 million future funding upsize, bringing our total additional committed funding amount to $22.1 million at December 31, 2013.

[10]

As part of the refinancing of the related senior mortgage in June 2013, we originated a $30.0 million mezzanine loan and our previous investment in the amount of $15.0 million, including the $7.4 million participated interest, was repaid in full. Following the refinancing, we entered into a loan participation agreement in the amount of $7.4 million on a $30.0 million mortgage. Due to our continued involvement with the loan, the portion that was participated out has been recorded in other assets and other liabilities in the consolidated balance sheets.

[11]

As of December 31, 2013, we were committed to fund an additional $0.3 million in connection with this loan.

[12]

Loan loss reserves are specifically allocated to investments. Our reserves reflect management's judgment of the probability and severity of losses based on Level 3 data. We cannot be certain that our judgment will prove to be correct or that reserves will be adequate over time to protect against potential future losses.

Debt_and_Preferred_Equity_Inve3

Debt and Preferred Equity Investments (Details 2) (USD $)	12 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2013		Dec. 31, 2012
Preferred equity investment	'		'
Aggregate weighted average current yield (as a percent)	11.47%		'
Senior Financing	$5,196,398		'
Debt and preferred equity investments	1,304,839		1,348,434
Preferred equity investments	'		'
Preferred equity investment	'		'
Aggregate weighted average current yield (as a percent)	10.91%		'
Senior Financing	1,577,007		'
Debt and preferred equity investments	369,364		338,579
Preferred equity with initial mandatory redemption on July, 2015	'		'
Preferred equity investment	'		'
Senior Financing	525,000	[1]	'
Debt and preferred equity investments	115,198	[1]	99,768	[1]
Preferred equity with initial mandatory redemption on April, 2016	'		'
Preferred equity investment	'		'
Senior Financing	55,747	[1],[2]	'
Debt and preferred equity investments	25,896	[1],[2]	18,925	[1],[2]
Preferred equity with initial mandatory redemption on July, 2016	'		'
Preferred equity investment	'		'
Senior Financing	926,260	[1]	'
Debt and preferred equity investments	218,330	[1]	209,959	[1]
Preferred equity with initial mandatory redemption on November 2017	'		'
Preferred equity investment	'		'
Senior Financing	70,000		'
Debt and preferred equity investments	$9,940		$9,927

[1]	The difference between the pay and accrual rates is included as an addition to the principal balance outstanding.
[2]	As of December 31, 2013, the loan is fully funded.

Debt_and_Preferred_Equity_Inve4

Debt and Preferred Equity Investments (Details 3) (USD $)	12 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Loan loss reserve activity	'	'	'
Balance at beginning of year	$7,000	$50,175	$61,361
Expensed	0	3,000	10,875
Recoveries	0	-2,436	-4,370
Charge-offs and reclassifications	-6,000	-43,739	-17,691
Balance at end of period	$1,000	$7,000	$50,175

Debt_and_Preferred_Equity_Inve5

Debt and Preferred Equity Investments (Details 4) (USD $)	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012
	segment	segment
Investments, Debt and Equity Securities [Abstract]	'	'
Number of portfolio segments of financial receivables (segment)	1	1
Additional amount of financing receivables included in other assets	$172,800,000	$121,300,000
Unpaid Principal Balance	'	'
With no related allowance recorded	0	0
With an allowance recorded	10,750,000	10,750,000
Unpaid Principal Balance	10,750,000	10,750,000
Recorded Investment	'	'
With no related allowance recorded	0	0
With an allowance recorded	10,750,000	10,750,000
Recorded Investment	10,750,000	10,750,000
Allowance Allocated	1,000,000	7,000,000
Average recorded investment in impaired loans	10,881,000	50,231,000
Investment income recognized	$7,117,000	$3,712,000

Investment_in_Unconsolidated_J2

Investment in Unconsolidated Joint Ventures (Details) (USD $)

3 Months Ended

12 Months Ended

1 Months Ended

12 Months Ended

1 Months Ended

12 Months Ended

1 Months Ended

12 Months Ended

1 Months Ended

12 Months Ended

Dec. 31, 2013

Sep. 30, 2013

Jun. 30, 2013

Mar. 31, 2013

Dec. 31, 2012

Sep. 30, 2012

Jun. 30, 2012

Mar. 31, 2012

Dec. 31, 2013

Dec. 31, 2012

Dec. 31, 2011

Dec. 31, 2013

Jun. 30, 2012

Dec. 31, 2013

Sep. 30, 2012

Dec. 31, 2013

Mar. 31, 2011

Dec. 31, 2013

31-May-11

Dec. 31, 2013

Dec. 31, 2012

Oct. 31, 2013

Dec. 31, 2013

Sep. 30, 2013

Dec. 31, 2013

Feb. 28, 2013

Sep. 30, 2012

Dec. 31, 2013

Aug. 31, 2012

Nov. 30, 2012

Dec. 31, 2013

Nov. 30, 2013

Dec. 31, 2013

Nov. 30, 2012

Dec. 31, 2013

Nov. 30, 2012

Dec. 31, 2013

sqft

investment

100 Park Avenue

21 West 34th Street

1604-1610 Broadway

717 Fifth Avenue

800 Third Avenue

1745 Broadway

1 and 2 Jericho Plaza

The Meadows

388 and 390 Greenwich Street

180/182 Broadway

600 Lexington Avenue

11 West 34th Street

7 Renaissance

3 Columbus Circle

280 Park Avenue

1552-1560 Broadway

747 Madison Avenue

724 Fifth Avenue

10 East 53rd Street

33 Beekman

West Coast office portfolio

521 Fifth Avenue

21 East 66th Street

315 West 36th Street

Herald Center

650 Fifth Avenue

Joint venture

521 Fifth Avenue

Mezzanine loans

Mortgage Loan

sqft

unit

sqft

unit

sqft

property

sqft

Three retail units

2 residential units

Four residential units

sqft

747 Madison Avenue

Joint venture

floor

property

sqft

unit

West Coast office portfolio

General information on each joint venture

Number of VIEs in which the entity is not primary beneficiary

Net equity investment in VIEs in which the entity is not primary beneficiary

$310,700,000

$117,700,000

$310,700,000

$117,700,000

Ownership Interest (as a percent)

49.90%

50.00%

70.00%

[1]

10.92%

[2]

42.95%

32.26%

20.26%

50.00%

50.60%

[3]

25.50%

[4]

55.00%

30.00%

[5]

50.00%

48.90%

[6]

50.00%

[7]

50.00%

[8]

33.33%

[9]

50.00%

55.00%

45.90%

[10]

42.02%

[11]

50.50%

[12]

32.28%

[13]

32.28%

16.14%

35.50%

40.00%

[14]

50.00%

[15]

100.00%

Economic Interest (as a percent)

49.90%

50.00%

70.00%

[1]

10.92%

[2]

42.95%

32.26%

20.26%

50.00%

50.60%

[3]

25.50%

[4]

55.00%

30.00%

[5]

50.00%

48.90%

[6]

49.50%

[7]

50.00%

[8]

33.33%

[9]

50.00%

55.00%

45.90%

[10]

43.74%

[11]

50.50%

[12]

32.28%

[13]

35.50%

40.00%

[14]

50.00%

[15]

Area of property (sqft)

28,549,979

834,000

30,000

[1]

120,000

[2]

526,000

674,000

640,000

582,000

2,600,000

[3]

71,000

[4]

304,000

17,000

[5]

37,000

769,000

[6]

1,237,000

[7]

49,000

[8]

13,045

10,000

[9]

65,000

390,000

145,000

[10]

4,500,000

4,474,000

[11]

460,000

[12]

17,000

[13]

148,000

365,000

[14]

32,000

[15]

Acquisition Price

95,800,000

[16]

22,400,000

[16]

4,400,000

[1],[16]

251,900,000

[16],[2]

285,000,000

[16]

520,000,000

[16]

210,000,000

[16]

111,500,000

[16]

1,575,000,000

[16],[3]

43,600,000

[16],[4]

193,000,000

[16]

10,800,000

[16],[5]

4,000,000

[16]

500,000,000

[16],[6]

400,000,000

[16],[7]

136,550,000

[16],[8]

66,250,000

[16],[9]

223,000,000

[16]

252,500,000

[16]

31,000,000

[10],[16]

880,103,000

[11],[16]

315,000,000

[12],[16]

75,000,000

[13],[16]

45,000,000

[16]

50,000,000

[14],[16]

[15],[16]

Beneficial interest sold (as a percent)

50.00%

Sales price

617,600,000

315,000,000

Proceeds from sale of equity method investments

67,900,000

224,300,000

Recognized gain (loss) on sale of interest in property

7,538,000

-354,000

-3,583,000

19,277,000

-4,807,000

15,323,000

7,260,000

3,601,000

37,053,000

2,918,000

3,000,000

2,100,000

2,800,000

19,400,000

Employee compensation award

1,000,000

Valuation of investment under the recapitalization transaction

286,600,000

1,100,000,000

Effective ownership interest in underlying investment (as a percent)

50.00%

Additional income upon the contribution of debt investment to joint venture

193,843,000

119,155,000

120,418,000

38,700,000

Debt investments contributed to joint venture

25,362,000

286,571,000

111,300,000

Floating rate financing assumed by joint venture

30,000,000

Number of units in property (units)

Number of units in real estate property acquired (units)

Payments to acquire equity method investments

150,274,000

215,174,000

109,920,000

7,500,000

51,000,000

Number of floors of student housing (floors)

Number of properties (properties)

Prior to the recapitalization positions held in mezzanine and preferred equity

678,800,000

Period of extension option for mortgage secured by the portfolio

'1 year

Number of properties sold (properties)

Repayments of loan

194,500,000

20,500,000

194,500,000

Remaining percentage of interest acquired in joint venture (percent)

10.73%

Partnership interest sold to Harel by joint venture (as a percent)

20.78%

6.00%

49.50%

Term

'2 years

'7 years

Interest rate, description

'LIBOR

Interest rate added to base rate (as a percent)

2.75%

2.20%

Ownership interest sold (as a percent)

20.78%

6.00%

49.50%

Face amount of loan

68,000,000

26,700,000

150,000,000

20,500,000

Mortgage on properties assumed

$170,000,000

Interest rate (as a percent)

8.75%

[1]

In MarchB 2013, Sutton conveyed his interest in this property to us.

[2]

In June 2012, this retail condominium was recapitalized. The recapitalization triggered a promote to our partner, which resulted in a reduction of our economic interest. In addition, we sold 50% of our remaining interest at a property valuation of $617.6 million. We recognized $67.9 million of additional cash income, equivalent to profit, due to the distribution of refinancing proceeds and a gain on sale of $3.0 million, which is net of a $1.0 million employee compensation award, accrued in connection with the realization of this investment gain as a bonus to certain employees that were instrumental in realizing the gain on this sale.

[3]

The property is subject to a triple-net lease arrangement with a single tenant, which expires in 2020. In December 2013, the joint venture signed an agreement extending the lease through December 31, 2035. The agreement includes an option for the tenant to acquire the property for a specified price during the period from December 1, 2017 through December 31, 2020.

[4]

In June 2013, the joint venture completed its redevelopment project. In July 2013, the lease for Pace University, or Pace, its primary tenant, commenced.

[5]

The property is subject to a long-term net lease arrangement.

[6]

As a result of the sale of a condominium interest in SeptemberB 2012, YoungB & Rubicam,B Inc., or Y&R, owns a portion of the property, generally floors three through eight referred to as Y&R units. Because the joint venture has an option to repurchase the Y&R units, no gain was recognized on this sale.

[7]

In March 2011, we contributed our debt investment with a carrying value of $286.6 million to a newly formed joint venture in which we hold a 50% interest. We realized $38.7 million of additional income upon the contribution. This income is included in investment income in the consolidated statements of income. The joint venture paid us approximately $111.3 million and also assumed $30.0 million of related floating rate financing which matures in June 2016. In May 2011, this joint venture took control of the underlying property as part of a recapitalization transaction which valued the investment at approximately $1.1 billion.

[8]

In connection with this acquisition, the joint venture also acquired a long-term leasehold interest in the retail space and certain other spaces at 1560 Broadway, which is adjacent to 1552 Broadway. The purchase price relates only to the purchase of the 1552 Broadway interest which comprises 13,045 square feet. In 2012, we, along with Sutton, acquired the property at 155 West 46thB Street, which is adjacent to 1552 and 1560 Broadway, and sold it to the fee owner of 1560 Broadway.

[9]

The joint venture owns 100% interest as tenant-in-common in 30 East 65th Street Corporation and the related proprietary lease of three cooperative apartment units in the building. In October 2013, the joint ventured acquired two additional cooperative apartment units in the building for $7.5 million.

[10]

The joint venture acquired the fee interest in the property and will develop an approximately 30 story building for student housing. Upon completion of the development, the joint venture will convey a long-term ground lease condominium interest in the building to Pace.

[11]

In September 2012, the Company, together with an affiliate of Blackstone, Gramercy and Square Mile Capital Management LLC, or Square Mile, formed a joint venture to recapitalize a 31-property, 4.5-million-square-foot West Coast office portfolio. The joint venture extended the $678.8 million mortgage secured by the portfolio for a term of 2 years with a 1-year extension option. In addition, the joint venture entered into a new $68.0 million mezzanine loan for a term of 2 years. Prior to the recapitalization in September 2012, the Company held $26.7 million in mezzanine and preferred equity positions in the entity that owned the portfolio. Following the recapitalization, Blackstone became the majority owner of the joint venture, with Equity Office Properties, a Blackstone affiliate, being responsible for the portfoliobs management and leasing. In FebruaryB 2013, we acquired Gramercybs 10.73% interest in the joint venture and simultaneously sold 20.78% of the newly acquired interest to Square Mile Capital Management LLC or Square Mile. During the year ended December 31, 2013, we acquired Square Milebs 6.00% interest in the joint venture and the joint venture sold three of the properties for an aggregate of $224.3 million, on which we recognized a gain of approximately $2.1 million. The proceeds from the sale of these properties were used primarily to repay $194.5 million of the mortgage and $20.5 million of the mezzanine loan.

[12]

In November 2012, we sold our 49.5% partnership interest in 521 Fifth Avenue to Plaza Global Real Estate Partners for a gross valuation price of $315.0 million for this property. We recognized a gain of $19.4 million on the sale which is net of a $1.0 million employee compensation award, accrued in connection with the realization of this investment gain as a bonus to certain employees that were instrumental in realizing the gain on this sale. We also refinanced the existing $150.0 million loan with a $170.0 million 7-year mortgage loan which bears interest at 220 basis points over LIBOR. Following the sale, we deconsolidated the entity effective NovemberB 30, 2012 and have accounted our investment under the equity method because of lack of control. During the year ended December 31, 2013, we recognized additional post closing costs of $2.8 million as an adjustment to the gain.

[13]

We hold a 32.28% interest in 3 retail and 2 residential units at the property and a 16.14% in 4 residential units at the property.

[14]

The joint venture owned a preferred equity interest in an entity that holds the interest in a mixed commercial use property located in Manhattan. The preferred equity bore interest at a rate of 8.75% per annum through its redemption date in December 2013.

[15]

The joint venture owns a long-term leasehold interest in the retail space at 650 Fifth Avenue. In connection with the ground lease obligation, SLG provided a performance guaranty and Sutton executed a contribution agreement to reflect its pro rata obligation. In an event the property is converted into a condominium unit and the landlord elects the purchase option, the joint venture shall be obligated to acquire the unit at the then fair value. In November 2013, the joint venture signed an agreement to buy out the lease of retailer Juicy Couture for $51.0 million as part of its plan to redevelop and reposition the property. Under this agreement, the tenant shall terminate the lease no later than April 2014.

[16]

Acquisition price represents the actual or implied gross purchase price for the joint venture.

Investment_in_Unconsolidated_J3

Investment in Unconsolidated Joint Ventures (Details 2) (USD $)

Dec. 31, 2013

Dec. 31, 2012

Dec. 31, 2013

Dec. 31, 2012

Dec. 31, 2013

Dec. 31, 2012

Dec. 31, 2013

Dec. 31, 2012

Dec. 31, 2013

Dec. 31, 2012

Dec. 31, 2013

Dec. 31, 2012

Dec. 31, 2013

Dec. 31, 2012

Dec. 31, 2013

Dec. 31, 2012

Dec. 31, 2013

Dec. 31, 2012

Dec. 31, 2013

Dec. 31, 2012

Dec. 31, 2013

Dec. 31, 2012

Dec. 31, 2013

Dec. 31, 2012

Dec. 31, 2013

Dec. 31, 2012

Jun. 30, 2013

Sep. 30, 2012

Dec. 31, 2013

Dec. 31, 2012

Dec. 31, 2013

Dec. 31, 2012

Dec. 31, 2013

Dec. 31, 2012

Dec. 31, 2013

Dec. 31, 2012

Nov. 30, 2013

Dec. 31, 2013

Dec. 31, 2012

Aug. 31, 2012

Dec. 31, 2012

Dec. 31, 2013

Dec. 31, 2012

Apr. 30, 2013

Dec. 31, 2013

Dec. 31, 2012

Dec. 31, 2013

Apr. 30, 2013

Dec. 31, 2013

Apr. 30, 2013

Dec. 31, 2013

Dec. 31, 2012

Dec. 31, 2013

Dec. 31, 2012

Dec. 31, 2013

Dec. 31, 2012

Dec. 31, 2013

Dec. 31, 2012

Dec. 31, 2013

Dec. 31, 2012

Nov. 30, 2012

Dec. 31, 2013

Dec. 31, 2012

Dec. 31, 2013

Dec. 31, 2012

Dec. 31, 2013

Dec. 31, 2012

Dec. 31, 2013

Dec. 31, 2012

Dec. 31, 2013

Dec. 31, 2012

Sep. 30, 2012

Dec. 31, 2013

Aug. 31, 2012

Dec. 31, 2013

Sep. 30, 2012

Dec. 31, 2013

33 Beekman

16 Court Street

Joint venture

Initial Maturity July 2022

Initial Maturity July 2024

West Coast office portfolio

3 Columbus Circle

LIBOR

100 Park Avenue

7 Renaissance

11 West 34th Street

280 Park Avenue

21 West 34th Street

1745 Broadway

1 and 2 Jericho Plaza

800 Third Avenue

388 and 390 Greenwich Street

315 West 36th Street

717 Fifth Avenue

21 East 66th Street

1604-1610 Broadway

West Coast office portfolio

747 Madison Avenue

180/182 Broadway

The Meadows

3 Columbus Circle

1552 Broadway

Other loan payable

724 Fifth Avenue

10 East 53rd Street

33 Beekman

600 Lexington Avenue

521 Fifth Avenue

27-29 West 34th Street

16 Court Street

Joint venture

property

Joint venture

717 Fifth Avenue

16 Court Street

Mortgage loan

Mezzanine loans

Mortgage loan

Mezzanine loans

extenstion_option

Mortgage loan

Mezzanine loans

717 Fifth Avenue

Mezzanine loans

Mortgage Loan

Mortgage loan

First mortgage notes and other loan payable

Interest rate, fixed rate debt (as a percent)

6.64%

[1]

10.00%

[1]

4.82%

[1]

6.57%

[1]

5.76%

[1]

5.68%

[1]

5.65%

[1]

6.00%

[1]

3.20%

[1],[2]

3.16%

[1]

4.10%

[1],[3]

5.66%

[1],[4]

4.45%

[1],[5]

9.00%

[1],[5]

Interest rate, floating rate debt (as a percent)

3.22%

[1],[6]

1.34%

[1],[2]

2.88%

[1]

3.93%

[1],[7]

2.97%

[1]

2.94%

[1],[8]

7.75%

[1],[9]

2.38%

[1],[10]

3.48%

[1],[11]

1.09%

[1]

2.54%

[1]

2.69%

[1]

2.94%

[1],[12]

2.28%

[1]

2.39%

[1]

Total fixed rate debt

$4,130,629,000

$3,457,769,000

$3,223,895,000

$3,219,885,000

$209,786,000

$212,287,000

$1,276,000

$856,000

$17,205,000

$17,491,000

$706,886,000

$710,000,000

$100,000,000

$340,000,000

$163,750,000

$20,910,000

$996,082,000

[2]

$996,082,000

[2]

$25,000,000

$300,000,000

$290,000,000

$12,000,000

[3]

$12,000,000

[3]

$27,000,000

[4]

$27,000,000

[4]

$300,000,000

[5]

$300,000,000

[5]

$304,000,000

[5]

$294,509,000

[5]

Total floating rate debt

729,949,000

1,157,695,000

79,243,000

[6]

1,842,815,000

2,138,163,000

142,297,000

[2]

142,297,000

[2]

72,000,000

70,300,000

1,959,000

2,033,000

526,290,000

[7]

745,025,000

[7]

33,125,000

89,893,000

[8]

71,524,000

[8]

57,000,000

[9]

67,350,000

[9]

239,233,000

[10]

247,253,000

[10]

158,690,000

[11]

113,869,000

[11]

30,000,000

120,000,000

125,000,000

18,362,000

[12]

18,362,000

[12]

120,616,000

124,384,000

170,000,000

[13]

53,375,000

[13]

[14]

84,916,000

[14]

Total mortgages and other loans payable

4,860,578,000

4,615,464,000

5,066,710,000

5,358,048,000

576,000,000

562,400,000

Maximum amount of loan recourse to entity

75,000,000

218,400,000

200,000,000

Face amount of loan

245,000,000

68,000,000

26,700,000

20,500,000

Interest rate added to base rate (as a percent)

2.75%

3.50%

Number of properties sold (properties)

Repayments of loan

194,500,000

20,500,000

194,500,000

Committed amount

60,000,000

90,000,000

60,000,000

67,400,000

200,000,000

170,000,000

30,000,000

Period of extension option for mortgage secured by the portfolio

'1 year

Term of refinanced mortgage

'3 years

'7 years

'2 years

Proceeds from sale of equity method investments

10,800,000

224,300,000

Possible increase in mortgage based on meeting certain performance hurdles

40,000,000

Undrawn amount

3,000,000

Committed additional capital contribution funded

260,000,000

Amount outstanding

119,600,000

Number of extension options (extension options)

Unfunded amount

$37,600,000

$3,700,000

[1]

Effective weighted average interest rate for the year ended DecemberB 31, 2013, taking into account interest rate hedges in effect during the period.

[2]

These loans are comprised of a $576.0 million mortgage and a $562.4 million mezzanine loan, both of which are fixed rate loans, except for $72.0 million of the mortgage and $70.3 million of the mezzanine loan which are floating. Up to $200.0 million of the mezzanine loan, secured indirectly by these properties, is recourse to us. We believe it is unlikely that we will be required to perform under this guarantee.

[3]

In AprilB 2013, the loan was refinanced at par and its maturity was extended to AprilB 2023.

[4]

This loan went into default in NovemberB 2009 due to the non-payment of debt service.

[5]

In June 2012, the joint venture replaced the $245.0 million floating rate mortgage loan, which bore interest at 275 basis points over LIBOR and was due to mature in September 2012, with a $300.0 million fixed rate mortgage loan and $290.0 million mezzanine loan which is subject to accretion based on the difference between contractual interest rate and contractual pay rate.

[6]

In AprilB 2013, we acquired interests from our joint venture partner, CIF, and have consolidated the entity due to our controlling interest. In December 2013, we repaid $5.0 million of the principal balance and modified and extended the terms of the existing mortgage. The modified mortgage bears interest based on one-month LIBOR plus 350 basis points with a floor of 50 basis points.

[7]

As a result of the sale of three of its properties, the joint venture paid down $194.5 million of its mortgage and $20.5 million of its mezzanine loan.

[8]

This loan has a committed amount of $90.0 million. In November 2013, this loan was extended by one-year, subject to principal amortization through the maturity date

[9]

As a result of the refinancing and restructuring in August 2012, we replaced the previous mortgage with a $60.0 million, three-year mortgage, of which $3.0 million was unfunded as of DecemberB 31, 2012, and recognized additional income of $10.8 million due to the repayment of the previous mortgage at a discount. In December 2013, the joint venture upsized the original mortgage with a maximum amount of $60.0 million to $67.4 million. All other terms of the loan remained the same.

[10]

This loan has a committed amount of $260.0 million. The joint venture has the ability to increase the mortgage by $40.0 million based on meeting certain performance hurdles. In connection with this obligation, we executed a master lease agreement and our joint venture partner executed a contribution agreement to reflect its pro rata obligation under the master lease. The lien on the mortgage and the master lease excludes the condominium interest owned by Y&R. See Note 7 of prior table.

[11]

In AprilB 2013, we refinanced the previous $119.6 million mortgage with a $200.0 million three-year loan construction financing facility comprised of a $170.0 million mortgage loan and a $30.0 million mezzanine loan. The facility has two one-year extension options. As of DecemberB 31, 2013, $37.6 million of the mortgage loan and $3.7 million of the mezzanine loan remained unfunded.

[12]

This loan has a committed amount of $75.0 million, which is recourse to us. Our partner has indemnified us for its pro rata share of the recourse guarantee. A portion of the guarantee terminates upon the joint venture reaching certain milestones. We believe it is unlikely that we will be required to perform under this guarantee.

[13]

In MayB 2013, this loan was refinanced and its maturity was extended to MayB 2018. In December 2013, we sold our interest in the joint venture, inclusive of our share in the joint venture debt.

[14]

In AprilB 2013, we acquired interests from our joint venture partner, CIF, and have consolidated the entity due to our controlling interest.

Investment_in_Unconsolidated_J4

Investment in Unconsolidated Joint Ventures (Details 3) (USD $)	12 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Assets	'	'	'
Commercial real estate property, net	$10,687,540	$10,269,630	'
Other assets	750,123	718,326	'
Liabilities and members' equity	'	'	'
Mortgages and other loans payable	4,860,578	4,615,464	'
Company's investments in unconsolidated joint ventures	1,113,218	1,032,243	'
Combined statements of income for the unconsolidated joint ventures	'	'	'
Operating expenses	293,514	292,392	257,938
Ground rent	39,926	37,866	32,919
Real estate taxes	218,832	209,337	173,154
Interest expense, net of interest income	330,215	329,897	285,248
Amortization of deferred financing costs	16,695	19,450	14,108
Transaction related costs, net of recoveries	3,987	5,625	5,561
Depreciation and amortization	357,599	351,539	292,311
Total expenses	1,327,053	1,303,708	1,127,059
Company's equity in net income from unconsolidated joint ventures	9,921	76,418	1,583
Joint venture	'	'	'
Assets	'	'	'
Commercial real estate property, net	6,846,021	6,910,991	'
Other assets	827,282	728,113	'
Total assets	7,673,303	7,639,104	'
Liabilities and members' equity	'	'	'
Mortgages and other loans payable	5,066,710	5,358,048	'
Other liabilities	596,960	406,929	'
Members' equity	2,009,633	1,874,127	'
Total liabilities and members' equity	7,673,303	7,639,104	'
Company's investments in unconsolidated joint ventures	1,113,218	1,032,243	'
Combined statements of income for the unconsolidated joint ventures	'	'	'
Total revenues	628,649	511,157	480,935
Operating expenses	114,633	80,722	71,830
Ground rent	2,863	2,975	3,683
Real estate taxes	71,755	53,613	51,511
Interest expense, net of interest income	225,765	221,476	210,489
Amortization of deferred financing costs	17,092	9,739	12,911
Transaction related costs, net of recoveries	808	2,044	2,665
Depreciation and amortization	192,504	166,336	137,070
Total expenses	625,420	536,905	490,159
Gain on early extinguishment of debt	0	21,421	0
Net income (loss) before gain on sale	3,229	-4,327	-9,224
Company's equity in net income from unconsolidated joint ventures	$9,921	$76,418	$1,583

Investment_in_Unconsolidated_J5

Investment in Unconsolidated Joint Ventures Investment in Unconsolidated Joint Ventures-Additional Information (Details) (USD $)

3 Months Ended

12 Months Ended

0 Months Ended

1 Months Ended

12 Months Ended

1 Months Ended

Dec. 31, 2013

Sep. 30, 2013

Jun. 30, 2013

Mar. 31, 2013

Dec. 31, 2012

Sep. 30, 2012

Jun. 30, 2012

Mar. 31, 2012

Dec. 31, 2013

Dec. 31, 2012

Dec. 31, 2011

Dec. 31, 2013

Jul. 31, 2012

Apr. 30, 2012

Mar. 31, 2012

Nov. 30, 2011

Aug. 31, 2011

Jun. 30, 2012

Dec. 31, 2013

Dec. 31, 2012

Dec. 31, 2010

Aug. 31, 2012

27-29 West 34th Street

One Court Square

379 West Broadway

141 Fifth Avenue

33 West 450 Street

1551 to 1555 Broadway

717 Fifth Avenue

Joint venture

The Meadows

Joint venture

Investment in Unconsolidated Joint Ventures

Beneficial interest sold (as a percent)

50.00%

10.00%

50.00%

Consideration for sale of beneficial interest in real estate property

$70,100,000

$9,700,000

Mortgage loan related to property sales

52,800,000

Sales price

481,100,000

48,500,000

46,000,000

617,600,000

Mortgage assigned to joint venture

30,000,000

315,000,000

Equity in net gain on sale of interest in unconsolidated joint venture/ real estate

7,538,000

-354,000

-3,583,000

19,277,000

-4,807,000

15,323,000

7,260,000

3,601,000

37,053,000

2,918,000

7,600,000

1,000,000

6,500,000

7,300,000

4,000,000

3,000,000

Accrued employee compensation award

1,500,000

Fees position acquired

13,500,000

Employee compensation award

1,500,000

1,000,000

Remaining percentage of interest acquired in joint venture (percent)

50.00%

Ownership Interest (as a percent)

100.00%

10.92%

[1]

Management fees, base revenue

4,700,000

7,900,000

8,600,000

Cash income recognized on distribution

67,900,000

Gain on early extinguishment of debt

$10,800,000

[1]

Deferred_Costs_Details

Deferred Costs (Details) (USD $)	Dec. 31, 2013	Dec. 31, 2012
In Thousands, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012
Deferred Costs [Abstract]	'	'
Deferred leasing	$326,379	$285,931
Deferred financing	157,088	152,596
Deferred costs, gross	483,467	438,527
Less accumulated amortization	-216,409	-177,382
Deferred costs, net	$267,058	$261,145

Mortgages_and_Other_Loans_Paya2

Mortgages and Other Loans Payable (Details) (USD $)

3 Months Ended

12 Months Ended

1 Months Ended

12 Months Ended

0 Months Ended

2 Months Ended

9 Months Ended

1 Months Ended

Dec. 31, 2013

Sep. 30, 2013

Jun. 30, 2013

Mar. 31, 2013

Dec. 31, 2012

Sep. 30, 2012

Jun. 30, 2012

Mar. 31, 2012

Dec. 31, 2013

Dec. 31, 2012

Dec. 31, 2011

Nov. 30, 2012

Dec. 31, 2013

Dec. 31, 2012

Dec. 31, 2013

Dec. 31, 2012

Dec. 31, 2013

Dec. 31, 2012

Dec. 31, 2013

Dec. 31, 2012

Dec. 31, 2013

Dec. 31, 2012

Dec. 31, 2013

Dec. 31, 2012

Dec. 31, 2013

Dec. 31, 2012

Dec. 31, 2013

Dec. 31, 2012

Dec. 31, 2013

Dec. 31, 2012

Dec. 31, 2013

Dec. 31, 2012

Dec. 31, 2013

Dec. 31, 2012

Dec. 31, 2013

Dec. 31, 2012

Dec. 31, 2013

Dec. 31, 2012

Dec. 31, 2013

Dec. 31, 2012

Dec. 31, 2013

Dec. 31, 2012

Dec. 31, 2013

Dec. 31, 2012

Dec. 31, 2013

Dec. 31, 2012

Dec. 31, 2013

Dec. 31, 2012

Feb. 28, 2013

Apr. 30, 2012

Dec. 31, 2013

Dec. 31, 2012

Dec. 31, 2013

Dec. 31, 2012

Oct. 31, 2013

Aug. 30, 2013

Dec. 31, 2013

Dec. 31, 2012

Dec. 31, 2013

Dec. 31, 2012

Dec. 31, 2013

Dec. 31, 2012

Dec. 31, 2013

Dec. 31, 2012

Dec. 31, 2013

Dec. 31, 2012

Nov. 30, 2013

Sep. 30, 2013

Dec. 31, 2013

609 Partners, LLC

125 Park Avenue

711 Third Avenue

625 Madison Avenue

500 West Putnam

420 Lexington Avenue

Landmark Square

485 Lexington Avenue

120 West 45th Street

762 Madison Avenue

2 Herald Square

885 Third Avenue

Other loan payable

One Madison Avenue

100 Church

919 Third Avenue

400 East 57th Street

400 East 58th Street

1515 Broadway

300 Main Street

220 East 42nd Street

Master repurchase

16 Court Street

180 Maiden Lane

248-252 Bedford Avenue

LIBOR

Series E preferred units

Master repurchase

16 Court Street

Minimum

Maximum

Master repurchase

Mortgages and Other Loans Payable

Interest rate, fixed rate debt (as a percent)

5.00%

[1],[2]

5.75%

[1]

4.99%

[1]

7.27%

[1]

5.52%

[1]

7.15%

[1]

4.00%

[1]

5.61%

[1]

6.12%

[1]

3.75%

[1]

5.36%

[1]

6.26%

[1]

8.00%

[1],[3]

5.91%

[1]

4.68%

[1]

5.12%

[1],[4]

4.13%

[1]

4.13%

[1]

3.93%

[1],[5]

0.00%

[1],[6]

0.00%

[1],[7]

Interest rate, floating rate debt (as a percent)

0.00%

[1],[5]

4.05%

[1],[7]

3.28%

[1],[8]

3.22%

[1],[9]

2.39%

[1],[10]

2.44%

[1]

Total fixed rate debt

$4,130,629,000

$3,457,769,000

$4,130,629,000

$3,457,769,000

$23,000

[2]

$23,000

[2]

$146,250,000

$120,000,000

$120,830,000

$125,603,000

$23,529,000

$24,060,000

$182,641,000

$184,992,000

$82,909,000

$84,486,000

$450,000,000

$170,000,000

$8,211,000

$8,371,000

$191,250,000

$267,650,000

$50,000,000

[3]

$50,000,000

[3]

$587,336,000

$607,678,000

$230,000,000

$500,000,000

[4]

$500,000,000

[4]

$70,000,000

$30,000,000

$900,000,000

[5]

[6]

$11,500,000

[6]

[7]

$185,906,000

[7]

Total floating rate debt

729,949,000

1,157,695,000

729,949,000

1,157,695,000

[5]

769,813,000

[5]

275,000,000

[7]

91,000,000

[8]

116,667,000

[8]

79,243,000

[9]

262,706,000

[10]

271,215,000

[10]

22,000,000

Total mortgages and other loans payable

4,860,578,000

4,615,464,000

4,860,578,000

4,615,464,000

Preferred Units, shares issued (shares)

63,900,000

Preferred Units (as a percent)

5.00%

Preferred Units, liquidation preference (in dollars per share)

Preferred Units, shares outstanding (shares)

22,658

Interest in property (as a percent)

51.00%

Extinguishment of debt

775,000,000

447,200,000

185,900,000

175,000,000

Refinanced mortgage loan

900,000,000

775,000,000

275,000,000

Term

'12 years

'7 years

Loss (gain) on early extinguishment of debt

-5,000

10,000

18,513,000

6,978,000

18,518,000

6,978,000

-904,000

18,500,000

Prepayment penalty

7,600,000

Revolving credit facility, maximum borrowing capacity

300,000,000

1,600,000,000

Interest rate added to base rate (as a percent)

3.50%

3.00%

3.50%

2.50%

3.25%

Repaid loan

5,000,000

Gross book value of the properties and debt and preferred equity investments collateralizing the mortgages and other loans payable

$8,000,000,000

$7,600,000,000

$8,000,000,000

$7,600,000,000

Variable rate floor (percent)

0.50%

[1]

Effective weighted average interest rate for the year ended DecemberB 31, 2013, taking into account interest rate hedges in effect during the period.

[2]

As part of an acquisition, the Operating Partnership issued 63.9 million units of its 5.0% SeriesB E preferred units, or the SeriesB E units, with a liquidation preference of $1.00 per unit. As of DecemberB 31, 2013, 22,658 SeriesB E units remaining outstanding.

[3]

This loan is secured by a portion of a preferred equity investment.

[4]

We own a 51.0% controlling interest in the joint venture that is the borrower on this loan. This loan is non-recourse to us.

[5]

In April 2012, we refinanced the previous $447.2 million mortgage with a $775.0 million seven-year mortgage. In FebruaryB 2013, we refinanced the previous $775.0 million mortgage with a new $900.0 million 12-year mortgage and realized a net loss on early extinguishment of debt of approximately $18.5 million, including a prepayment penalty of $7.6 million.

[6]

The property was sold in September 2013.

[7]

In October 2013, we closed on a $275.0 million seven-year mortgage. This new mortgage replaced the $185.9 million previous mortgage that was repaid in August 2013.

[8]

In December 2013, we entered into a new Master Repurchase Agreement, or MRA, with a maximum facility capacity of $300.0 million, under which we agreed to sell certain debt investments in exchange for cash with a simultaneous agreement to repurchase the same debt investments at a certain date or on demand. This new MRA, which bears interest ranging from 250 and 325 basis points over one-month LIBOR depending on the pledged collateral, replaced the previous $175.0 million MRA facility, which bore interest based on one-month LIBOR plus 300 basis points basis points through September 2013 and 350 basis points through November 2013.

[9]

[10]

In connection with this consolidated joint venture obligation, we executed a master lease agreement. Our partner has executed a contribution agreement to reflect its pro rata share of the obligation under the master lease.

Corporate_Indebtedness_Details

Corporate Indebtedness (Details) (USD $)

3 Months Ended

12 Months Ended

1 Months Ended

12 Months Ended

0 Months Ended

1 Months Ended

12 Months Ended

1 Months Ended

12 Months Ended

1 Months Ended

12 Months Ended

Dec. 31, 2013

Sep. 30, 2013

Jun. 30, 2013

Mar. 31, 2013

Dec. 31, 2012

Sep. 30, 2012

Jun. 30, 2012

Mar. 31, 2012

Dec. 31, 2013

Dec. 31, 2012

Dec. 31, 2011

Nov. 30, 2012

Dec. 31, 2013

Nov. 30, 2012

Dec. 31, 2013

Nov. 30, 2012

Dec. 31, 2013

Nov. 30, 2012

Dec. 31, 2013

Dec. 27, 2012

Oct. 31, 2010

Dec. 31, 2013

Dec. 31, 2012

Dec. 31, 2013

Mar. 31, 2007

Dec. 31, 2013

Jun. 30, 2005

Dec. 31, 2013

Dec. 31, 2012

Dec. 31, 2013

Dec. 31, 2012

Dec. 31, 2013

Dec. 31, 2012

Dec. 31, 2013

Dec. 31, 2012

Dec. 31, 2013

Dec. 31, 2012

Dec. 31, 2013

Dec. 31, 2012

Dec. 31, 2013

Dec. 31, 2012

Dec. 31, 2013

Dec. 31, 2012

Dec. 31, 2013

Dec. 31, 2012

Joint venture

2012 Credit Facility

Revolving credit facility

Term loan

2011 Revolving Credit Facility

2007 Revolving Credit Facility

Senior Unsecured Notes

6.00% Senior unsecured notes maturing on March 31, 2016

5.875% Senior Unsecured Notes

6.00% Senior Unsecured Notes

3.00% Senior unsecured notes maturing on October 15, 2017

4.0% exchangeable senior debentures due 2025

3.0% exchangeable senior debentures due 2027

Term Loans and Trust Preferred Securities

Mortgages and other loans payable

LIBOR

Senior Unsecured Notes

extenstion_option

Maximum

Minimum

Maximum

Minimum

Maximum

Minimum

Revolving credit facility

Term loan

2011 Revolving Credit Facility

2007 Revolving Credit Facility

Term Loans and Trust Preferred Securities

5.88% Senior unsecured notes maturing on August 15, 2014

6.00% Senior unsecured notes maturing on March 31, 2016

3.00% Senior unsecured notes maturing on October 15, 2017

5.00% senior unsecured notes maturing on August 15, 2018

7.75% Senior unsecured notes maturing on March 15, 2020

4.50% senior unsecured notes maturing on December 1, 2022

4.0% exchangeable senior debentures due 2025

3.0% exchangeable senior debentures due 2027

Maximum

Minimum

Maximum

Minimum

Maximum

Minimum

Maximum

Minimum

Corporate Indebtedness

Line of Credit Facility, Extension Fee, Percentage

0.10%

Revolving credit facility, maximum borrowing capacity

$300,000,000

$1,600,000,000

$1,200,000,000

$400,000,000

$1,500,000,000

Number of extension options (extension options)

Extension option available

'6 months

Maximum borrowing capacity, optional expansion

1,500,000,000

Interest rate added to base rate (as a percent)

1.45%

1.75%

1.00%

1.65%

2.00%

1.15%

1.85%

1.00%

1.10%

0.70%

1.25%

Fee on the unused balance, payable quarterly in arrears (as a percent)

0.35%

0.15%

0.45%

0.18%

0.20%

0.13%

Facility fee on total commitments, payable quarterly in arrears (as a percent)

0.30%

Letters of credit

74,600,000

Outstanding under line of credit facility

220,000,000

70,000,000

220,000,000

70,000,000

220,000,000

400,000,000

Ability to borrow under line of credit facility

900,000,000

Debt disclosures by scheduled maturity date

Unpaid Principal Balance

1,386,914,000

75,898,000

[1],[2]

255,308,000

[1],[2]

345,000,000

[3]

250,000,000

[4]

250,000,000

[4]

200,000,000

[4]

7,000

[2],[5]

10,701,000

[6]

Accreted Balance

1,739,330,000

1,734,956,000

1,739,330,000

1,734,956,000

1,339,330,000

1,334,956,000

75,898,000

[1],[2]

75,898,000

[1],[2]

255,206,000

[1],[2]

255,165,000

[1],[2]

297,837,000

[3]

287,373,000

[3]

249,681,000

[4]

249,620,000

[4]

250,000,000

[4]

250,000,000

[4]

200,000,000

[4]

200,000,000

[4]

7,000

[2],[5]

7,000

[2],[5]

10,701,000

[6]

16,893,000

[6]

Coupon Rate (as a percent)

5.88%

6.00%

3.00%

4.00%

3.00%

5.61%

5.88%

[1],[2],[7]

6.00%

[1],[2],[7]

3.00%

[3],[7]

5.00%

[4],[7]

7.75%

[4],[7]

4.50%

[4],[7]

4.00%

[2],[5],[7]

3.00%

[6],[7]

Effective Rate (as a percent)

1.62%

2.00%

5.88%

[1],[2]

6.00%

[1],[2]

3.00%

[3]

5.00%

[4]

7.75%

[4]

4.50%

[4]

4.00%

[2],[5]

3.00%

[6]

Term

'10 years

[1],[2]

'10 years

[1],[2]

'7 years

[3]

'7 years

[4]

'10 years

[4]

'10 years

[4]

'20 years

[2],[5]

'20 years

[6]

Aggregate principal amount of notes repurchased

42,400,000

22,700,000

19,700,000

650,000

6,200,000

Repayment of debt

46,400,000

102,200,000

Loss (gain) on early extinguishment of debt

-5,000

10,000

18,513,000

6,978,000

18,518,000

6,978,000

-904,000

-3,800,000

Debt instrument issued, value

345,000,000

750,000,000

100,000,000

Premium on sale price to calculate exchange price of notes (as a percent)

30.00%

25.00%

Exchange price (in dollars per share)

$85.81

$1.35

$173.30

Adjusted exchange rate for the debentures (in shares)

11.7153

7.7461

Amount of convertible debt recorded in equity

78,300,000

66,600,000

Debt Instrument, Unamortized Discount

47,200,000

Number of years for which securities will bear fixed rate of interest

'10 years

Scheduled Amortization

2014

43,976,000

2015

47,312,000

2016

55,938,000

2017

61,213,000

2018

64,205,000

Thereafter

247,407,000

Total amortization of debt

520,051,000

Principal Repayments

2014

398,312,000

237,273,000

2015

45,332,000

229,537,000

2016

604,510,000

594,017,000

2017

930,338,000

1,086,579,000

2018

28,000

21,363,000

Thereafter

173,944,000

2,171,758,000

Total principal repayments

2,152,464,000

4,340,527,000

Scheduled Amortization and Principal Repayments

2014

357,147,000

75,898,000

2015

276,856,000

7,000

2016

905,263,000

255,308,000

2017

1,723,493,000

220,000,000

355,701,000

2018

735,568,000

650,000,000

Thereafter

2,969,165,000

450,000,000

100,000,000

Total amortization of debt and principal repayments

6,967,492,000

220,000,000

1,786,914,000

100,000,000

Interest expense

332,276,000

331,516,000

287,252,000

Interest income

-2,061,000

-1,619,000

-2,004,000

Interest expense, net

330,215,000

329,897,000

285,248,000

Interest capitalized

$11,475,000

$12,218,000

$5,123,000

[1]

On DecemberB 27, 2012, we repurchased $42.4 million of aggregate principal amount of these notes, consisting of $22.7 million of the 5.875% Notes and $19.7 million of the 6.0% Notes, for a total consideration of $46.4 million and realized a net loss on early extinguishment of debt of approximately $3.8 million.

[2]

Issued by ROP.

[3]

In OctoberB 2010, the Operating Partnership issued $345.0 million of these exchangeable notes. Interest on these notes is payable semi-annually on AprilB 15 and OctoberB 15. The notes had an initial exchange rate representing an exchange price that was set at a 30.0% premium to the last reported sale price of SL Green's common stock on OctoberB 6, 2010, or $85.81. The initial exchange rate is subject to adjustment under certain circumstances. The current exchange rate is 11.7153 shares of SL Green's common stock per $1,000 principal amount of these notes. The notes are senior unsecured obligations of the Operating Partnership and are exchangeable upon the occurrence of specified events and during the period beginning on the twenty-second scheduled trading day prior to the maturity date and ending on the second business day prior to the maturity date, into cash or a combination of cash and shares of SL Green's common stock, if any, at our option. The notes are guaranteed by ROP. On the issuance date, $78.3 million of the debt balance was recorded in equity. As of DecemberB 31, 2013, approximately $47.2 million remained to be amortized into the debt balance.

[4]

Issued by the Company, the Operating Partnership and ROP, as co-obligors.

[5]

Exchangeable senior debentures which are currently callable at par. In addition, the debentures can be put to ROP, at the option of the holder at par plus accrued and unpaid interest, on JuneB 15, 2015 and 2020 and upon the occurrence of certain change of control transactions. As a result of the acquisition of all outstanding shares of common stock of Reckson, or the Reckson Merger, the adjusted exchange rate for the debentures is 7.7461 shares of SL Green's common stock per $1,000 of principal amount of debentures and the adjusted reference dividend for the debentures is $1.3491. During the year ended DecemberB 31, 2012, we repurchased $650,000 of these bonds at par.

[6]

In MarchB 2007, the Operating Partnership issued $750.0 million of these exchangeable notes. Interest on these notes is payable semi-annually on MarchB 30 and SeptemberB 30. The notes have an initial exchange rate representing an exchange price that was set at a 25.0% premium to the last reported sale price of the Company's common stock on MarchB 20, 2007, or $173.30. The initial exchange rate is subject to adjustment under certain circumstances. The notes are senior unsecured obligations of the Operating Partnership and are exchangeable upon the occurrence of specified events and during the period beginning on the twenty-second scheduled trading day prior to the maturity date and ending on the second business day prior to the maturity date, into cash or a combination of cash and shares of SL Green's common stock, if any, at our option. The notes are currently redeemable at the Operating Partnershipbs option. The Operating Partnership may be required to repurchase the notes on MarchB 30, 2017 and 2022, and upon the occurrence of certain designated events. On MarchB 30, 2012, we repurchased $102.2 million of aggregate principal amount of the exchangeable notes pursuant to a mandatory offer to repurchase the notes. On the issuance date, $66.6 million was recorded in equity and was fully amortized into the debt balance as of MarchB 31, 2012. During the year ended December 31, 2013, we repurchased $6.2 million of aggregate principal amount of exchangeable notes at approximately at par.

[7]

Interest on the senior unsecured notes is payable semi-annually with principal and unpaid interest due on the scheduled maturity dates.

Related_Party_Transactions_Det

Related Party Transactions (Details) (USD $)	12 Months Ended
Related Party Transactions (Details) (USD $)	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Amounts due from/to related parties	'	'	'
Due from joint ventures	$2,376,000	$511,000	'
Other	6,154,000	7,020,000	'
Related party receivables	8,530,000	7,531,000	'
Due to a joint venture (included in Accounts payable and accrued expenses)	0	-8,401,000	'
Alliance Building Services	'	'	'
Related Party Transactions	'	'	'
Profit participation from related party	3,500,000	4,000,000	2,700,000
Payments made for services	19,500,000	17,900,000	16,100,000
A-List Marketing, LLC	'	'	'
Related Party Transactions	'	'	'
Payments made for services	293,636	155,500	140,300
Nancy Peck and Company	'	'	'
Related Party Transactions	'	'	'
Space at 420 Lexington Avenue leased (sqft)	1,003	'	'
Lease rent due per year	35,516	'	'
Increased lease rent due per year beginning in year seven	40,000	'	'
Entity with Stephen L Green ownership interest	'	'	'
Related Party Transactions	'	'	'
Property management fees from related party	$441,093	$384,900	$420,300

Noncontrolling_Interests_on_th1

Noncontrolling Interests on the Company's Consolidated Financial Statements (Details) (USD $)

12 Months Ended

1 Months Ended

In Thousands, except Share data, unless otherwise specified

Dec. 31, 2013

Dec. 31, 2012

Dec. 31, 2011

Dec. 31, 2013

Dec. 31, 2012

Dec. 31, 2013

Dec. 31, 2012

Dec. 31, 2013

Dec. 31, 2012

Jan. 31, 2012

Nov. 30, 2011

Series G Preferred Units

Series H Preferred Units

SL Green Operating Partnership

Series G Preferred Units

Series H Preferred Units

Series E preferred units

Series F Preferred Units

Organization

Noncontrolling interest in the operating partnership (as a percent)

2.96%

2.94%

Number of units of operating partnership owned by the noncontrolling interest unit holders (shares)

2,902,317

2,759,758

Shares of common stock reserved for issuance upon redemption of units of limited partnership interest in operating partnership (shares)

2,902,317

Number of preferred units issued (in shares)

1,902,000

80,000

1,902,000

80,000

22,658

Dividend rate preferred units (as a percent)

4.50%

6.00%

5.00%

Liquidation preference of preferred units (in dollars per share)

$25

Annual dividends on preferred units (in dollars per share)

$1.13

$1.50

$1,000

Operating partnership common stock value use for conversion of preferred units (in dollars per share)

$88.50

Number of company common stock issue on redemption of operation partnership common units

Rollforward analysis of the activity relating to the noncontrolling interests in the operating partnership

Balance at beginning of period

$212,907

$195,030

Distributions

-21,946

-143,579

-4,146

-3,296

Issuance of common units

24,750

42,239

Redemption of common units

-17,287

-87,513

Net income

3,023

5,597

14,629

3,023

5,597

Accumulated other comprehensive income (loss) allocation

611

-388

-291

611

-388

Fair value adjustment

45,618

61,238

Balance at end of period

$265,476

$212,907

$265,476

$212,907

Stockholders_Equity_of_the_Com2

Stockholders' Equity of the Company (Details) (USD $)	1 Months Ended	12 Months Ended
In Thousands, except Share data, unless otherwise specified	Nov. 30, 2013	Dec. 31, 2013	Dec. 31, 2012
Stockholders' Equity Note [Abstract]	'	'	'
Authorized capital stock (in shares)	'	260,000,000	'
Authorized shares, par value (in dollars per share)	'	$0.01	'
Common stock, shares authorized (shares)	'	160,000,000	160,000,000
Common stock, par value (in dollars per share)	$0.01	$0.01	$0.01
Share Price	$95.94	'	'
Excess stock, shares authorized (shares)	'	75,000,000	'
Excess stock, par value (in dollars per share)	'	$0.01	'
Preferred stock, shares authorized (shares)	'	25,000,000	'
Preferred stock, par value (in dollars per share)	'	$0.01	'
Shares issued (shares)	'	94,993,284	'
Shares outstanding (shares)	'	0	'
Issuance of common stock (shares)	2,600,000	'	'
Issuance of common stock	$248,900	$290,699	$221,965

Stockholders_Equity_of_the_Com3

Stockholders' Equity of the Company (Details 2) (USD $)

1 Months Ended

3 Months Ended

12 Months Ended

1 Months Ended

12 Months Ended

1 Months Ended

6 Months Ended

0 Months Ended

1 Months Ended

12 Months Ended

Nov. 30, 2013

Dec. 31, 2013

Sep. 30, 2013

Jun. 30, 2013

Mar. 31, 2013

Dec. 31, 2012

Sep. 30, 2012

Jun. 30, 2012

Mar. 31, 2012

Dec. 31, 2013

Dec. 31, 2012

Dec. 31, 2011

Dec. 31, 2013

Jul. 31, 2011

Aug. 31, 2012

Dec. 31, 2013

Dec. 31, 2012

Jun. 30, 2013

Sep. 30, 2012

Jun. 30, 2013

Dec. 31, 2012

Jul. 14, 2012

Jul. 31, 2012

Dec. 31, 2013

Dec. 31, 2012

Mar. 31, 2012

At-the-market equity offering programs

Series I Preferred Stock

Series C Preferred Stock

Series D Preferred Stock

Dividend Reinvestment and Stock Purchase Plan (DRIP)

Stockholders' Equity

Aggregate value of the shares of common stock to be sold

$250,000,000

Issuance of common stock (shares)

2,600,000

462,276

761

1,300,000

Aggregate gross proceeds from shares sold

42,500,000

Net proceeds from sale of common stock

290,699,000

201,279,000

516,168,000

41,800,000

66,600

99,600,000

Aggregate value of shares available for issuance

2,800,000

Preferred stock, shares outstanding (shares)

9,200,000

7,700,000

11,700,000

7,700,000

Perpetual Preferred Units (as a percent)

6.50%

7.63%

7.88%

Perpetual Preferred stock, liquidation preference (in dollars per share)

$25

Perpetual Preferred stock, annual dividends per share (in dollars per share)

$1.63

$0.35

$0.37

$1.91

$0.49

$1.97

Net proceeds from sale of preferred stock

221,965,000

221,900,000

Common stock, shares authorized (shares)

160,000,000

3,500,000

Preferred stock redeemed (in shares)

4,000,000

Preferred stock Redemption (in dollars per share)

$25

Preferred stock redemption costs

$12,160,000

$10,010,000

$12,160,000

$10,010,000

$12,200,000

$6,300,000

$3,700,000

Stockholders_Equity_of_the_Com4

Stockholders' Equity of the Company (Details 3) (USD $)	3 Months Ended								12 Months Ended
In Thousands, except Share data, unless otherwise specified	Dec. 31, 2013	Sep. 30, 2013	Jun. 30, 2013	Mar. 31, 2013	Dec. 31, 2012	Sep. 30, 2012	Jun. 30, 2012	Mar. 31, 2012	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Basic Earnings:	'	'	'	'	'	'	'	'	'	'	'
Net income attributable to SL Green common stockholders	$37,120	$37,025	$8,276	$18,909	$19,956	$7,732	$103,040	$25,256	$101,330	$155,984	$617,232
Effect of Dilutive Securities:	'	'	'	'	'	'	'	'	'	'	'
Redemption of units to common shares	'	'	'	'	'	'	'	'	0	0	0
Diluted Earnings:	'	'	'	'	'	'	'	'	'	'	'
Income attributable to SLGOP common unitholders	'	'	'	'	'	'	'	'	104,353	161,581	631,861
Basic Shares:	'	'	'	'	'	'	'	'	'	'	'
Basic weighted average common shares outstanding (in shares)	'	'	'	'	'	'	'	'	92,269,000	89,319,000	83,762,000
Effect of Dilutive Securities:	'	'	'	'	'	'	'	'	'	'	'
Redemption of units to common shares (shares)	'	'	'	'	'	'	'	'	2,735,000	3,207,000	1,985,000
Stock-based compensation plans (in shares)	'	'	'	'	'	'	'	'	262,000	347,000	497,000
Diluted weighted average common stock outstanding (shares)	'	'	'	'	'	'	'	'	95,266,000	92,873,000	86,244,000
Common stock shares excluded from the diluted shares outstanding	'	'	'	'	'	'	'	'	964,789	627,000	680,000
3.0% exchangeable senior debentures due 2017	'	'	'	'	'	'	'	'	'	'	'
Effect of Dilutive Securities:	'	'	'	'	'	'	'	'	'	'	'
Stock-based compensation plans (in shares)	'	'	'	'	'	'	'	'	0	0	0
Interest rate (as a percent)	3.00%	'	'	'	'	'	'	'	3.00%	'	'
3.0% exchangeable senior debentures due 2027	'	'	'	'	'	'	'	'	'	'	'
Effect of Dilutive Securities:	'	'	'	'	'	'	'	'	'	'	'
Stock-based compensation plans (in shares)	'	'	'	'	'	'	'	'	0	0	0
Interest rate (as a percent)	3.00%	'	'	'	'	'	'	'	3.00%	'	'
4.0% exchangeable senior debentures due 2025	'	'	'	'	'	'	'	'	'	'	'
Effect of Dilutive Securities:	'	'	'	'	'	'	'	'	'	'	'
Stock-based compensation plans (in shares)	'	'	'	'	'	'	'	'	0	0	0
Interest rate (as a percent)	4.00%	'	'	'	'	'	'	'	4.00%	'	'
Common Stock	'	'	'	'	'	'	'	'	'	'	'
Effect of Dilutive Securities:	'	'	'	'	'	'	'	'	'	'	'
Redemption of units to common shares	'	'	'	'	'	'	'	'	3,023	5,597	14,629
Stock options	'	'	'	'	'	'	'	'	'	'	'
Effect of Dilutive Securities:	'	'	'	'	'	'	'	'	'	'	'
Redemption of units to common shares	'	'	'	'	'	'	'	'	$0	$0	$0

Partners_Capital_of_the_Operat2

Partners' Capital of the Operating Partnership (Details)	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Common Stock	'	'	'	'
Stockholders' Equity	'	'	'	'
Shares outstanding (shares)	94,993,000	91,250,000	85,783,000	78,307,000
SL Green Operating Partnership	'	'	'	'
Stockholders' Equity	'	'	'	'
Noncontrolling interest in the operating partnership (as a percent)	2.96%	2.94%	'	'
Number of units of operating partnership owned by the noncontrolling interest unit holders (shares)	2,902,317	2,759,758	'	'
SL Green Operating Partnership \| Common Stock	'	'	'	'
Stockholders' Equity	'	'	'	'
Shares outstanding (shares)	94,993,284	'	'	'
SL Green Operating Partnership \| Series I Preferred Units	'	'	'	'
Stockholders' Equity	'	'	'	'
Shares outstanding (shares)	9,200,000	'	'	'

Partners_Capital_of_the_Operat3

Partners' Capital of the Operating Partnership-EPS (Details) (USD $)	3 Months Ended								12 Months Ended
In Thousands, except Share data, unless otherwise specified	Dec. 31, 2013	Sep. 30, 2013	Jun. 30, 2013	Mar. 31, 2013	Dec. 31, 2012	Sep. 30, 2012	Jun. 30, 2012	Mar. 31, 2012	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Stockholders' Equity	'	'	'	'	'	'	'	'	'	'	'
Net income attributable to SL Green common stockholders	$37,120	$37,025	$8,276	$18,909	$19,956	$7,732	$103,040	$25,256	$101,330	$155,984	$617,232
Redemption of units to common shares	'	'	'	'	'	'	'	'	0	0	0
Income attributable to SLGOP common unitholders	'	'	'	'	'	'	'	'	104,353	161,581	631,861
Basic weighted average common shares outstanding (in shares)	'	'	'	'	'	'	'	'	92,269,000	89,319,000	83,762,000
Stock-based compensation plans (in shares)	'	'	'	'	'	'	'	'	262,000	347,000	497,000
Common stock shares excluded from the diluted shares outstanding	'	'	'	'	'	'	'	'	964,789	627,000	680,000
SL Green Operating Partnership	'	'	'	'	'	'	'	'	'	'	'
Stockholders' Equity	'	'	'	'	'	'	'	'	'	'	'
Net income attributable to SL Green common stockholders	'	'	'	'	'	'	'	'	104,353	161,581	631,861
Income attributable to SLGOP common unitholders	'	'	'	'	'	'	'	'	$104,353	$161,581	$631,861
Basic weighted average common shares outstanding (in shares)	'	'	'	'	'	'	'	'	95,004,000	92,526,000	85,747,000
Stock-based compensation plans (shares)	'	'	'	'	'	'	'	'	262,000	347,000	497,000
Diluted weighted average common units outstanding (shares)	'	'	'	'	'	'	'	'	95,266,000	92,873,000	86,244,000
Common stock shares excluded from the diluted shares outstanding	'	'	'	'	'	'	'	'	964,789	627,000	680,000
3.0% exchangeable senior debentures due 2017 \| SL Green Operating Partnership	'	'	'	'	'	'	'	'	'	'	'
Stockholders' Equity	'	'	'	'	'	'	'	'	'	'	'
Interest rate (as a percent)	3.00%	'	'	'	'	'	'	'	3.00%	'	'
Stock-based compensation plans (in shares)	'	'	'	'	'	'	'	'	0	0	0
3.0% exchangeable senior debentures due 2027	'	'	'	'	'	'	'	'	'	'	'
Stockholders' Equity	'	'	'	'	'	'	'	'	'	'	'
Interest rate (as a percent)	3.00%	'	'	'	'	'	'	'	3.00%	'	'
Stock-based compensation plans (in shares)	'	'	'	'	'	'	'	'	0	0	0
3.0% exchangeable senior debentures due 2027 \| SL Green Operating Partnership	'	'	'	'	'	'	'	'	'	'	'
Stockholders' Equity	'	'	'	'	'	'	'	'	'	'	'
Interest rate (as a percent)	3.00%	'	'	'	'	'	'	'	3.00%	'	'
Stock-based compensation plans (in shares)	'	'	'	'	'	'	'	'	0	0	0
4.0% exchangeable senior debentures due 2025	'	'	'	'	'	'	'	'	'	'	'
Stockholders' Equity	'	'	'	'	'	'	'	'	'	'	'
Interest rate (as a percent)	4.00%	'	'	'	'	'	'	'	4.00%	'	'
Stock-based compensation plans (in shares)	'	'	'	'	'	'	'	'	0	0	0
4.0% exchangeable senior debentures due 2025 \| SL Green Operating Partnership	'	'	'	'	'	'	'	'	'	'	'
Stockholders' Equity	'	'	'	'	'	'	'	'	'	'	'
Interest rate (as a percent)	4.00%	'	'	'	'	'	'	'	4.00%	'	'
Stock-based compensation plans (in shares)	'	'	'	'	'	'	'	'	0	0	0

Sharebased_Compensation_Detail

Share-based Compensation (Details) (USD $)	12 Months Ended
Share-based Compensation (Details) (USD $)	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Restricted Stock Awards	'	'	'
Options Outstanding	'	'	'
Weighted average fair value of options granted during the year	$17,386,949	$7,023,942	$21,768,084
Summary of restricted stock	'	'	'
Balance at beginning of year (in shares)	2,804,901	2,912,456	2,728,290
Granted (in shares)	192,563	92,729	185,333
Cancelled (in shares)	-3,267	-200,284	-1,167
Balance at end of period (in shares)	2,994,197	2,804,901	2,912,456
Vested during the period (in shares)	21,074	408,800	66,299
Compensation expense recorded	6,713,155	6,930,381	17,365,401
Weighted average fair value of restricted stock granted during the year	17,386,949	7,023,942	21,768,084
Stock options	'	'	'
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions and Methodology [Abstract]	'	'	'
Dividend yield (as a percent)	1.92%	2.00%	2.00%
Expected life of option	'4 years 1 month 6 days	'3 years 8 months 12 days	'4 years 2 months 12 days
Risk-free interest rate (as a percent)	0.96%	0.46%	1.00%
Expected stock price volatility (as a percent)	36.12%	37.40%	47.98%
Options Outstanding	'	'	'
Balance at beginning of year (in shares)	1,201,000	1,277,200	1,353,002
Granted (in shares)	828,100	361,331	212,400
Exercised (in shares)	-223,531	-382,612	-243,901
Lapsed or cancelled (in shares)	-40,535	-54,919	-44,301
Balance at end of period (in shares)	1,765,034	1,201,000	1,277,200
Options exercisable at end of period (in shares)	461,458	479,913	644,429
Weighted average fair value of options granted during the year	18,041,576	6,602,967	4,647,554
Weighted Average Exercise Price	'	'	'
Balance at beginning of year (in dollars per share)	$75.05	$63.37	$58.85
Granted (in dollars per share)	$87.23	$75.36	$66.42
Exercised (in dollars per share)	$53.93	$36.65	$40.48
Lapsed or cancelled (in dollars per share)	$83.94	$72.99	$65.89
Balance at end of period (in dollars per share)	$83.24	$75.05	$63.37
Options exercisable at end of period (in dollars per share)	$89.38	$86.85	$72.31
Summary of restricted stock	'	'	'
Compensation expense recorded	6,500,000	5,100,000	4,700,000
Weighted average fair value of restricted stock granted during the year	$18,041,576	$6,602,967	$4,647,554

Sharebased_CompensationAdditio

Share-based Compensation-Additional Information (Details) (USD $)

12 Months Ended

3 Months Ended

Dec. 31, 2013

Dec. 31, 2012

Dec. 31, 2011

Dec. 31, 2013

Dec. 31, 2012

Dec. 31, 2011

Dec. 31, 2013

Dec. 31, 2012

Dec. 31, 2011

Dec. 31, 2010

Dec. 31, 2013

Dec. 31, 2012

Dec. 31, 2011

Dec. 31, 2013

Dec. 31, 2012

Dec. 31, 2011

Dec. 31, 2013

Dec. 31, 2012

Dec. 31, 2011

Dec. 11, 2013

Dec. 17, 2012

Dec. 31, 2010

Dec. 31, 2013

Dec. 31, 2012

Dec. 31, 2011

Aug. 31, 2011

Dec. 31, 2013

Mar. 31, 2013

Dec. 31, 2013

Jan. 31, 2008

Stock options

Restricted Stock Awards

LTIP units

Performance Shares

2010 Notional Unit Long-Term Compensation Plan

Third Amendment and Restated 2005 Stock Option and Incentive Plan

Stock options, stock appreciation rights and other awards

All other awards

2011 Outperformance Plan

Deferred Stock Compensation Plan for Directors

Employee Stock Purchase Plan

Minimum

Maximum

Minimum

Maximum

fungibleunits

Share-based Compensation Arrangement by Share-based Payment Award [Line Items]

Maximum fungible units that may be granted (in shares)

17,130,000

Fungible units per share (fungible units)

2.76

0.77

Award expiration period

'5 years

'10 years

'5 years

'10 years

Shares that may be issued if equal to fungible units (shares)

17,130,000

Share-based Compensation Arrangement By Share-based Payment Award, Number Of Fungible Units Available For Grant

4,200,000

Options vesting period

'1 year

'5 years

Period of commencement of option vesting, from date of grant

'1 year

Exercise price of options granted, low end of the range (in dollars per share)

$20.67

Exercise price of options granted, high end of the range (in dollars per share)

$137.18

Remaining weighted average contractual life of the options outstanding

'4 years 7 months 6 days

Remaining weighted average contractual life of the options exercisable

'3 years 9 months 28 days

Compensation expense

$6,500,000

$5,100,000

$4,700,000

$6,713,155

$6,930,381

$17,365,401

$4,500,000

$10,700,000

$9,300,000

$8,000,000

$5,500,000

$100,000

Total unrecognized compensation cost related to unvested stock awards

20,300,000

17,800,000

5,000,000

Weighted average period for recognition of compensation cost related to unvested stock awards

'3 years

'2 years 8 months

'1 year 6 months

Share-based Compensation

27,300,000

12,600,000

8,500,000

Annual award vesting rate, low end of range (as a percent)

15.00%

Annual award vesting rate, high end of range (as a percent)

35.00%

Fair value of restricted stock vested during the period

1,600,000

22,400,000

4,300,000

Cost of the plan, subject to adjustment for forfeitures

4,500,000

4,100,000

3,400,000

31,700,000

26,300,000

Weighted average fair value of options granted during the year

18,041,576

6,602,967

4,647,554

17,386,949

7,023,942

21,768,084

27,100,000

8,500,000

Approximate amount of LTIP units that may be earned by the recipients based on stock price appreciation

15,000,000

75,000,000

85,000,000

Approximate amount of awards that may be earned by recipients after beginning of the second year if maximum performance achieved

25,000,000

Approximate amount of awards that may be earned by recipients after beginning of the third year if maximum performance achieved

25,000,000

Minimum stock price appreciation to earn maximum amount of awards (as a percent)

50.00%

LTIP units earned (in shares)

327,416

385,583

366,815

Percentage of LTIP Units earned, vested on December 17, 2012 (percent)

25.00%

50.00%

Value of LTIP Units that could be earned expressed as percentage of outperformance amount in excess of the 30% benchmark (percent)

10.00%

Duration period return to stockholders exceeds 25%

'3 years

Cumulative return to stockholders (percent)

25.00%

Return to stockholders

$85,000,000

Portion of earned LTIP Units vested

'one-third

Percentage of LTIP Units earned, vesting on August 31, 2014 (percent)

50.00%

Percentage of LTIP Units earned, vesting on August 31, 2015 (percent)

50.00%

Maximum percentage of the annual retainer fee, chairman fees and meeting fees that may be deferred by non-employee directors (percent)

100.00%

Awards granted (in shares)

192,563

92,729

185,333

7,622

Phantom stock units outstanding (in shares)

2,994,197

2,804,901

2,912,456

2,728,290

73,524

Shares of common stock available for issuance (shares)

500,000

Duration of each offering period starting the first day of each calendar quarter

'3 months

Purchase price as a percentage of market value of the common stock (percent)

85.00%

Shares of common stock issued (shares)

73,635

Accumulated_Other_Comprehensiv4

Accumulated Other Comprehensive Loss of the Company (Details) (USD $)	12 Months Ended
	Dec. 31, 2013		Dec. 31, 2012		Dec. 31, 2011
Accumulated Other Comprehensive Income (Loss) of the Company [Roll Forward]	'		'		'
Ending Balance	($15,211,000)		($29,587,000)		'
Deferred net losses from terminated hedges	13,800,000		15,000,000		16,300,000
SL Green Realty Corp	'		'		'
Accumulated Other Comprehensive Income (Loss) of the Company [Roll Forward]	'		'		'
Beginning Balance	-29,587,000		-28,445,000		-22,659,000
Other comprehensive (loss) income before reclassifications	7,573,000		-15,101,000		-19,615,000
Amounts reclassified from accumulated other comprehensive income (loss)	6,803,000		13,959,000		13,829,000
Ending Balance	-15,211,000		-29,587,000		-28,445,000
SL Green Realty Corp \| Net unrealized loss on derivative instruments	'		'		'
Accumulated Other Comprehensive Income (Loss) of the Company [Roll Forward]	'		'		'
Beginning Balance	-16,834,000	[1]	-17,510,000	[1]	-14,009,000	[1]
Other comprehensive (loss) income before reclassifications	-168,000	[1]	-1,124,000	[1]	-5,019,000	[1]
Amounts reclassified from accumulated other comprehensive income (loss)	1,877,000	[1]	1,800,000	[1]	1,518,000	[1]
Ending Balance	-15,125,000	[1]	-16,834,000	[1]	-17,510,000	[1]
SL Green Realty Corp \| Unrealized gains and loss on marketable securities	'		'		'
Accumulated Other Comprehensive Income (Loss) of the Company [Roll Forward]	'		'		'
Beginning Balance	3,310,000		6,466,000		9,653,000
Other comprehensive (loss) income before reclassifications	1,474,000		-4,879,000		-4,682,000
Amounts reclassified from accumulated other comprehensive income (loss)	0		1,723,000		1,495,000
Ending Balance	4,784,000		3,310,000		6,466,000
SL Green Realty Corp \| Joint venture \| Net unrealized loss on derivative instruments	'		'		'
Accumulated Other Comprehensive Income (Loss) of the Company [Roll Forward]	'		'		'
Beginning Balance	-16,063,000	[2]	-17,401,000	[2]	-18,303,000	[2]
Other comprehensive (loss) income before reclassifications	6,267,000	[2]	-9,098,000	[2]	-9,914,000	[2]
Amounts reclassified from accumulated other comprehensive income (loss)	4,926,000	[2]	10,436,000	[2]	10,816,000	[2]
Ending Balance	($4,870,000)	[2]	($16,063,000)	[2]	($17,401,000)	[2]

[1]	Amount reclassified from accumulated other comprehensive income (loss) is included in interest expense in the respective consolidated statements of income. As of DecemberB 31, 2013, 2012 and 2011, the deferred net losses from these terminated hedges, which is included in accumulated other comprehensive loss relating to net unrealized loss on derivative instrument, was approximately $13.8 million , $15.0 million and $16.3 million, respectively.
[2]	Amount reclassified from accumulated other comprehensive income (loss) is included in equity in net income from unconsolidated joint ventures in the respective consolidated statements of income.

Accumulated_Other_Comprehensiv5

Accumulated Other Comprehensive Loss of the Operating Partnership (Details) (USD $)	12 Months Ended
	Dec. 31, 2013		Dec. 31, 2012		Dec. 31, 2011
Accumulated Other Comprehensive Income (Loss) of the Operating Partnership [Roll Forward]	'		'		'
Ending Balance	($15,211,000)		($29,587,000)		'
Deferred net losses from terminated hedges	13,800,000		15,000,000		16,300,000
SL Green Operating Partnership	'		'		'
Accumulated Other Comprehensive Income (Loss) of the Operating Partnership [Roll Forward]	'		'		'
Beginning Balance	-30,649,000		-29,119,000		-23,042,000
Other comprehensive (loss) income before reclassifications	7,982,000		-15,991,000		-20,233,000
Amounts reclassified from accumulated other comprehensive income (loss)	7,005,000		14,461,000		14,156,000
Ending Balance	-15,662,000		-30,649,000		-29,119,000
Deferred net losses from terminated hedges	14,200,000		15,500,000		16,700,000
Unrealized gains and loss on marketable securities \| SL Green Operating Partnership	'		'		'
Accumulated Other Comprehensive Income (Loss) of the Operating Partnership [Roll Forward]	'		'		'
Beginning Balance	-17,438,000	[1]	-18,391,000	[1]	-14,246,000	[1]
Other comprehensive (loss) income before reclassifications	-68,000	[1]	-912,000	[1]	-5,699,000	[1]
Amounts reclassified from accumulated other comprehensive income (loss)	1,933,000	[1]	1,865,000	[1]	1,554,000	[1]
Ending Balance	-15,573,000	[1]	-17,438,000	[1]	-18,391,000	[1]
Net unrealized loss on derivative instruments \| SL Green Operating Partnership	'		'		'
Accumulated Other Comprehensive Income (Loss) of the Operating Partnership [Roll Forward]	'		'		'
Beginning Balance	3,429,000		7,086,000		9,817,000
Other comprehensive (loss) income before reclassifications	1,497,000		-5,442,000		-4,261,000
Amounts reclassified from accumulated other comprehensive income (loss)	0		1,785,000		1,530,000
Ending Balance	4,926,000		3,429,000		7,086,000
Joint venture \| Unrealized gains and loss on marketable securities \| SL Green Operating Partnership	'		'		'
Accumulated Other Comprehensive Income (Loss) of the Operating Partnership [Roll Forward]	'		'		'
Beginning Balance	-16,640,000	[2]	-17,814,000	[2]	-18,613,000	[2]
Other comprehensive (loss) income before reclassifications	6,553,000	[2]	-9,637,000	[2]	-10,273,000	[2]
Amounts reclassified from accumulated other comprehensive income (loss)	5,072,000	[2]	10,811,000	[2]	11,072,000	[2]
Ending Balance	($5,015,000)	[2]	($16,640,000)	[2]	($17,814,000)	[2]

[1]	Amount reclassified from accumulated other comprehensive income (loss) is included in interest expense in the respective consolidated statements of income. As of DecemberB 31, 2013, 2012 and 2011, the deferred net losses from these terminated hedges, which is included in accumulated other comprehensive loss relating to net unrealized loss on derivative instrument, was approximately $14.2 million, $15.5 million and $16.7 million, respectively.
[2]	Amount reclassified from accumulated other comprehensive income (loss) is included in equity in net income from unconsolidated joint ventures in the respective consolidated statements of income.

Fair_Value_Measurements_Detail

Fair Value Measurements (Details) (USD $)	Dec. 31, 2013	Dec. 31, 2012
Fair Value of Financial Instruments	'	'
Marketable securities	$32,049,000	$21,429,000
Interest rate swap agreements (included in accrued interest payable and other liabilities)	1,329,000	1,959,000
Debt and preferred equity investments	1,304,839,000	1,348,434,000
Carrying Value	'	'
Fair Value of Financial Instruments	'	'
Fixed rate debt	5,599,960,000	4,922,725,000
Variable rate debt	1,319,948,000	1,597,695,000
Notional Value	6,919,908,000	6,520,420,000
Fair Value	'	'
Fair Value of Financial Instruments	'	'
Notional Value	7,214,402,000	6,891,738,000
Estimated fair value of debt and preferred equity investments, low end of range	1,300,000,000	'
Estimated fair value of debt and preferred equity investments, high end of range	1,400,000,000	'
Level 3 \| Carrying Value	'	'
Fair Value of Financial Instruments	'	'
Debt and preferred equity investments	1,304,839,000	1,348,434,000
Level 3 \| Fair Value	'	'
Fair Value of Financial Instruments	'	'
Fixed rate debt	5,886,980,000	5,334,244,000
Variable rate debt	1,327,422,000	1,557,494,000
Equity marketable securities \| Level 1	'	'
Fair Value of Financial Instruments	'	'
Marketable securities	4,307,000	2,202,000
Interest rate swap agreements (included in accrued interest payable and other liabilities)	0	0
Commercial mortgage-backed securities \| Level 2	'	'
Fair Value of Financial Instruments	'	'
Marketable securities	24,419,000	15,575,000
Interest rate swap agreements (included in accrued interest payable and other liabilities)	1,329,000	1,959,000
Rake bonds \| Level 3	'	'
Fair Value of Financial Instruments	'	'
Marketable securities	3,323,000	3,652,000
Interest rate swap agreements (included in accrued interest payable and other liabilities)	$0	$0

Financial_Instruments_Derivati2

Financial Instruments: Derivatives and Hedging (Details) (USD $)	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Financial Instruments: Derivatives and Hedging	'	'	'
Interest rate swap agreements (included in accrued interest payable and other liabilities	($1,329,000)	($1,959,000)	'
Loss from settlement of hedges included in accumulated other comprehensive loss	-16,000	-770,000	-66,000
Estimated current balance held in accumulated other comprehensive loss to be reclassified into earnings within the next 12 months	2,700,000	'	'
Share of joint venture of accumulated other comprehensive loss reclassified into equity in net income from unconsolidated joint ventures within the next 12 months	5,000,000	'	'
Amount of Gain or (Loss) Recognized in Other Comprehensive Loss (Effective Portion)	6,485,000	-10,549,000	-15,972,000
Amount of Loss Reclassified from Accumulated Other Comprehensive Loss into Income (Effective Portion)	7,005,000	12,676,000	12,626,000
Amount of Gain or (Loss) or Recognized into Income (Ineffective Portion)	3,000	3,000	-16,000
Derivative, Fair Value, Net	1,322,000	'	'
Interest Rate Swap	'	'	'
Financial Instruments: Derivatives and Hedging	'	'	'
Amount of Gain or (Loss) Recognized in Other Comprehensive Loss (Effective Portion)	-68,000	-912,000	-5,699,000
Amount of Loss Reclassified from Accumulated Other Comprehensive Loss into Income (Effective Portion)	1,933,000	1,865,000	1,554,000
Amount of Gain or (Loss) or Recognized into Income (Ineffective Portion)	3,000	3,000	-16,000
Interest Rate Cap expiring in November, 2015	'	'	'
Financial Instruments: Derivatives and Hedging	'	'	'
Notional Value	263,426,000	'	'
Strike Rate (as a percent)	6.00%	'	'
Derivative Asset, Fair Value, Gross Asset	9,000	'	'
Interest Rate Cap Expiring in September 2015	'	'	'
Financial Instruments: Derivatives and Hedging	'	'	'
Notional Value	137,500,000	'	'
Strike Rate (as a percent)	4.00%	'	'
Derivative Asset, Fair Value, Gross Asset	7,000	'	'
Interest Rate Cap expiring in June, 2016	'	'	'
Financial Instruments: Derivatives and Hedging	'	'	'
Notional Value	30,000,000	'	'
Strike Rate (as a percent)	2.30%	'	'
Interest rate swap agreements (included in accrued interest payable and other liabilities	-1,293,000	'	'
Interest Rate Swap expiring in February, 2015	'	'	'
Financial Instruments: Derivatives and Hedging	'	'	'
Notional Value	8,500,000	'	'
Strike Rate (as a percent)	0.74%	'	'
Interest rate swap agreements (included in accrued interest payable and other liabilities	-45,000	'	'
Level 2 \| Interest Rate Swap expiring in February, 2015	'	'	'
Financial Instruments: Derivatives and Hedging	'	'	'
Loss from settlement of hedges included in accumulated other comprehensive loss	'	-700,000	'
Joint venture	'	'	'
Financial Instruments: Derivatives and Hedging	'	'	'
Amount of Gain or (Loss) Recognized in Other Comprehensive Loss (Effective Portion)	6,553,000	-9,637,000	-10,273,000
Amount of Loss Reclassified from Accumulated Other Comprehensive Loss into Income (Effective Portion)	5,072,000	10,811,000	11,072,000
Amount of Gain or (Loss) or Recognized into Income (Ineffective Portion)	$0	$0	$0

Rental_Income_Details

Rental Income (Details) (USD $)	Dec. 31, 2013
In Thousands, unless otherwise specified	Dec. 31, 2013
Consolidated properties	'
Approximate future minimum rents to be received over the next five years and thereafter for non-cancelable operating leases	'
2014	$992,002
2015	939,016
2016	870,664
2017	792,471
2018	733,754
Thereafter	3,785,428
Total minimum lease payments	8,113,335
Unconsolidated properties	'
Approximate future minimum rents to be received over the next five years and thereafter for non-cancelable operating leases	'
2014	245,879
2015	195,447
2016	214,616
2017	201,671
2018	202,309
Thereafter	1,911,877
Total minimum lease payments	$2,971,799

Benefit_Plans_Details

Benefit Plans (Details) (USD $)	12 Months Ended				21 Months Ended
Benefit Plans (Details) (USD $)	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2000	Oct. 02, 2010
Multi-employer plans	'	'	'	'	'
Plan contributions	$17,293,000	$16,551,000	$14,294,000	'	'
Quarterly diversion of employer contributions from the Health Plan to the Pension Plan	'	'	'	'	1,950,000
401 (K) Plan	'	'	'	'	'
Employee contribution limit per calendar year (percent)	15.00%	'	'	'	'
Employer match of employee contributions of first specified percentage of annual compensation (percent)	50.00%	50.00%	50.00%	50.00%	'
Percentage of eligible compensation matched by employer (percent)	6.00%	6.00%	6.00%	4.00%	'
Matching contribution	550,000	561,000	502,000	'	'
Pension Plan	'	'	'	'	'
Multi-employer plans	'	'	'	'	'
Plan contributions	221,900,000	212,700,000	201,300,000	'	'
Health Plan	'	'	'	'	'
Multi-employer plans	'	'	'	'	'
Plan contributions	923,500,000	893,300,000	843,200,000	'	'
Pension Plan	'	'	'	'	'
Multi-employer plans	'	'	'	'	'
Plan contributions	2,765,000	2,506,000	2,264,000	'	'
Health Plan	'	'	'	'	'
Multi-employer plans	'	'	'	'	'
Plan contributions	8,522,000	8,020,000	6,919,000	'	'
Other plans	'	'	'	'	'
Multi-employer plans	'	'	'	'	'
Plan contributions	$6,006,000	$6,025,000	$5,111,000	'	'

Commitments_and_Contingencies_1

Commitments and Contingencies (Details) (USD $)	12 Months Ended			10 Months Ended	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2013	Dec. 31, 2012	Oct. 31, 2012	Dec. 31, 2013
	portfolio	Belmont	Belmont	Property and rental value coverage	Property and rental value coverage
Commitments and Contingencies.	'	'	'	'	'
Employment agreements with certain executives, minimum cash-based compensation for next fiscal year	$4,700,000	'	'	'	'
Employment agreements with certain executives, grant date value of deferred compensation awards	1,200,000	'	'	'	'
Number of property insurance portfolios for which all-risk property and rental value coverage is maintained (portfolio)	2	'	'	'	'
Blanket limit per occurrence maintained under first property portfolio (up to $950 million)	'	'	'	'	950,000,000
Limit per occurrence maintained under second property portfolio (up to $700 million)	'	'	'	'	700,000,000
Amount of flood coverage (up to $100 million)	'	'	'	'	100,000,000
Limit per occurrence and in aggregate per location under liability policies (up to $201 million)	'	'	'	201,000,000	'
Loss reserves	'	$7,000,000	$6,200,000	'	'

Commitments_and_Contingencies_2

Commitments and Contingencies (Details 2) (USD $)

Dec. 31, 2013

Dec. 31, 2012

Dec. 31, 2013

Oct. 31, 2012

Dec. 31, 2013

Jul. 31, 2011

Dec. 31, 2013

Nov. 30, 2012

Apr. 30, 1988

Dec. 31, 2013

Dec. 31, 2012

Dec. 31, 2013

420 Lexington Avenue

1080 Amsterdam Avenue

711 Third Avenue

461 Fifth Avenue

625 Madison Avenue

1185 Avenue of the Americas

673 First Avenue

Through July 2016

After July 2016

extenstion_option

711 Third Avenue

Commitments and Contingencies

Operating Leases, Term of Second Renewal Option

'21 years

'23 years

Number of renewal options available (extension option)

Annual ground lease payments through December 2019

$10,900,000

Annual ground lease payments through December 2029

11,200,000

Annual ground lease payments due thereafter

12,300,000

Value of land as a percentage of the fair market value of the property (percent)

6.00%

40.00%

Prepayment of ground lease rent

13,000,000

Cumulative amortization

27,400,000

6,500,000

6,300,000

Required annual ground lease payments, prior to reset

1,550,000

Percentage of fee not owned by the entity (percent)

50.00%

Required annual ground lease payments

2,100,000

4,600,000

6,900,000

5,250,000

5,500,000

Term of first renewal option

'21 years

'23 years

'25 years

Operating Leases, Term of Third Renewal Option

'15 years

Land as percentage of fair market value of the property (percent)

70.00%

Initial lease term

'49 years

Extension in lease term

'50 years

Capital lease, cost basis

$50,310,000

$40,340,000

$22,900,000

Commitments_and_Contingencies_3

Commitments and Contingencies (Details 3) (USD $)	12 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2013
Commitments and Contingencies Disclosure [Abstract]	'
Initial term of non cancellable operating leases, minimum	'1 year
Capital lease	'
2014	$2,292
2015	2,363
2016	2,531
2017	2,652
2018	2,652
Thereafter	353,826
Total minimum lease payments	366,316
Less amount representing interest	-318,645
Present value of net minimum lease payments	47,671
Non-cancellable operating leases	'
2014	35,356
2015	35,511
2016	35,943
2017	36,176
2018	36,176
Thereafter	1,409,808
Total minimum lease payments	$1,588,970

Segment_Information_Details

Segment Information (Details) (USD $)	3 Months Ended								12 Months Ended
	Dec. 31, 2013	Sep. 30, 2013	Jun. 30, 2013	Mar. 31, 2013	Dec. 31, 2012	Sep. 30, 2012	Jun. 30, 2012	Mar. 31, 2012	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
	Dec. 31, 2013	Sep. 30, 2013	Jun. 30, 2013	Mar. 31, 2013	Dec. 31, 2012	Sep. 30, 2012	Jun. 30, 2012	Mar. 31, 2012	segment	Dec. 31, 2012	Dec. 31, 2011
Segment information	'	'	'	'	'	'	'	'	'	'	'
Number of reportable segments (segment)	'	'	'	'	'	'	'	'	2	'	'
Total revenues	$374,699,000	$363,765,000	$365,145,000	$365,468,000	$346,599,000	$357,011,000	$344,535,000	$334,585,000	$1,469,077,000	$1,382,729,000	$1,246,859,000
Income from continuing operations before equity in net gain on sale of interest in unconsolidated joint venture/real estate and purchase price fair value adjustment	'	'	'	'	'	'	'	'	133,362,000	153,401,000	121,364,000
Total assets	14,959,001,000	'	'	'	14,386,296,000	'	'	'	14,959,001,000	14,386,296,000	'
Leverage rate assumption (as a percent)	'	'	'	'	'	'	'	'	100.00%	'	'
Marketing, general and administrative expenses and transaction related costs	'	'	'	'	'	'	'	'	90,200,000	88,500,000	85,700,000
Real Estate Segment	'	'	'	'	'	'	'	'	'	'	'
Segment information	'	'	'	'	'	'	'	'	'	'	'
Total revenues	'	'	'	'	'	'	'	'	1,275,234,000	1,263,574,000	1,126,441,000
Income from continuing operations before equity in net gain on sale of interest in unconsolidated joint venture/real estate and purchase price fair value adjustment	'	'	'	'	'	'	'	'	-27,024,000	60,455,000	20,327,000
Total assets	13,641,727,000	'	'	'	13,028,406,000	'	'	'	13,641,727,000	13,028,406,000	'
Debt and Preferred Equity Segment	'	'	'	'	'	'	'	'	'	'	'
Segment information	'	'	'	'	'	'	'	'	'	'	'
Total revenues	'	'	'	'	'	'	'	'	193,843,000	119,155,000	120,418,000
Income from continuing operations before equity in net gain on sale of interest in unconsolidated joint venture/real estate and purchase price fair value adjustment	'	'	'	'	'	'	'	'	160,386,000	92,946,000	101,037,000
Total assets	$1,317,274,000	'	'	'	$1,357,890,000	'	'	'	$1,317,274,000	$1,357,890,000	'

Segment_Information_Details_2

Segment Information (Details 2) (USD $)	3 Months Ended								12 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2013	Sep. 30, 2013	Jun. 30, 2013	Mar. 31, 2013	Dec. 31, 2012	Sep. 30, 2012	Jun. 30, 2012	Mar. 31, 2012	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Reconciliation of income from continuing operations to net income attributable to SL Green common stockholders	'	'	'	'	'	'	'	'	'	'	'
Income from continuing operations before equity in net gain on sale of interest in unconsolidated joint venture/real estate and purchase price fair value adjustment	'	'	'	'	'	'	'	'	$133,362	$153,401	$121,364
Equity in net gain on sale of interest in unconsolidated joint venture/ real estate	7,538	-354	-3,583	0	19,277	-4,807	15,323	7,260	3,601	37,053	2,918
Purchase price fair value adjustment	'	'	'	'	'	'	'	'	-2,305	0	498,195
Income from continuing operations	'	'	'	'	'	'	'	'	134,658	190,454	622,477
Net income from discontinued operations	0	1,406	-678	997	9,737	951	899	1,032	1,725	12,619	8,560
Gain on sale of discontinued operations	0	13,787	0	1,113	0	0	0	6,627	14,900	6,627	46,085
Net income	'	'	'	'	'	'	'	'	$151,283	$209,700	$677,122

Quarterly_Financial_Data_unaud2

Quarterly Financial Data (unaudited) (Details) (USD $)	3 Months Ended								12 Months Ended
Quarterly Financial Data (unaudited) (Details) (USD $)	Dec. 31, 2013	Sep. 30, 2013	Jun. 30, 2013	Mar. 31, 2013	Dec. 31, 2012	Sep. 30, 2012	Jun. 30, 2012	Mar. 31, 2012	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Condensed Financial Statements, Captions [Line Items]	'	'	'	'	'	'	'	'	'	'	'
Total revenues	$374,699,000	$363,765,000	$365,145,000	$365,468,000	$346,599,000	$357,011,000	$344,535,000	$334,585,000	$1,469,077,000	$1,382,729,000	$1,246,859,000
Income from continuing before equity in net gain (loss) on sale of interest in unconsolidated joint venture/real estate, purchase price fair value adjustment, gain (loss) on early extinguishment of debt, loss on sale of investment in marketable securities, net of noncontrolling interests	33,314,000	25,924,000	34,019,000	42,776,000	2,624,000	27,276,000	94,362,000	17,882,000	'	'	'
Equity in net gain (loss) on sale of interest in unconsolidated joint venture/real estate	7,538,000	-354,000	-3,583,000	0	19,277,000	-4,807,000	15,323,000	7,260,000	3,601,000	37,053,000	2,918,000
Purchase price fair value adjustment	0	0	-2,305,000	0	'	'	'	'	-2,239,000	0	486,660,000
Gain (loss) on early extinguishment of debt	5,000	0	-10,000	-18,513,000	-6,978,000	0	0	0	-18,518,000	-6,978,000	904,000
Gain (loss) on sale of investment in marketable securities	0	0	-8,000	-57,000	2,703,000	2,237,000	0	0	0	4,900,000	4,500,000
Net income (loss) from discontinued operations	0	1,406,000	-678,000	997,000	9,737,000	951,000	899,000	1,032,000	1,725,000	12,619,000	8,560,000
Gain on sale of discontinued operations	0	13,787,000	0	1,113,000	0	0	0	6,627,000	14,900,000	6,627,000	46,085,000
Net income attributable to SL Green	40,857,000	40,763,000	27,435,000	26,316,000	27,363,000	25,657,000	110,584,000	32,801,000	135,371,000	196,405,000	647,410,000
Preferred stock redemption costs	0	0	-12,160,000	0	0	-10,010,000	0	0	-12,160,000	-10,010,000	0
Perpetual preferred stock dividends	-3,737,000	-3,738,000	-6,999,000	-7,407,000	-7,407,000	-7,915,000	-7,544,000	-7,545,000	-21,881,000	-30,411,000	-30,178,000
Net income attributable to SL Green common stockholders	37,120,000	37,025,000	8,276,000	18,909,000	19,956,000	7,732,000	103,040,000	25,256,000	101,330,000	155,984,000	617,232,000
Net income per common share-Basic (usd per share)	$0.39	$0.40	$0.09	$0.21	$0.22	$0.09	$1.15	$0.29	$1.10	$1.75	$7.37
Net income per common share-Diluted (usd per share)	$0.39	$0.40	$0.09	$0.21	$0.22	$0.09	$1.14	$0.29	$1.10	$1.74	$7.33
SL Green Operating Partnership	'	'	'	'	'	'	'	'	'	'	'
Condensed Financial Statements, Captions [Line Items]	'	'	'	'	'	'	'	'	'	'	'
Total revenues	374,699,000	363,765,000	365,145,000	365,468,000	346,598,000	357,011,000	344,535,000	334,585,000	1,469,077,000	1,382,729,000	1,246,859,000
Income from continuing before equity in net gain (loss) on sale of interest in unconsolidated joint venture/real estate, purchase price fair value adjustment, gain (loss) on early extinguishment of debt, loss on sale of investment in marketable securities, net of noncontrolling interests	34,428,000	27,034,000	34,263,000	43,331,000	3,345,000	27,843,000	97,783,000	18,770,000	'	'	'
Equity in net gain (loss) on sale of interest in unconsolidated joint venture/real estate	7,538,000	-354,000	-3,583,000	0	19,277,000	-4,807,000	15,323,000	7,260,000	3,601,000	37,053,000	2,918,000
Purchase price fair value adjustment	0	0	-2,305,000	0	'	'	'	'	'	'	'
Gain (loss) on early extinguishment of debt	5,000	0	-10,000	-18,513,000	-6,978,000	0	0	0	-18,518,000	-6,978,000	904,000
Gain (loss) on sale of investment in marketable securities	0	0	-8,000	-57,000	2,703,000	2,237,000	0	0	'	'	'
Net income (loss) from discontinued operations	0	1,406,000	-678,000	997,000	9,737,000	951,000	899,000	1,032,000	1,725,000	12,619,000	8,560,000
Gain on sale of discontinued operations	0	13,787,000	0	1,113,000	0	0	0	6,627,000	14,900,000	6,627,000	46,085,000
Net income attributable to SL Green	'	'	'	'	'	'	'	'	138,394,000	202,002,000	662,039,000
Preferred stock redemption costs	0	0	-12,160,000	0	0	-10,010,000	0	0	'	'	'
Perpetual preferred stock dividends	-3,737,000	-3,738,000	-6,999,000	-7,407,000	-7,407,000	-7,915,000	-7,544,000	-7,545,000	'	'	'
Net income attributable to SL Green common stockholders	$38,234,000	$38,135,000	$8,520,000	$19,464,000	'	'	'	'	$104,353,000	$161,581,000	$631,861,000
Net income per common share-Basic (usd per share)	$0.39	$0.40	$0.09	$0.21	$0.22	$0.09	$1.15	$0.29	'	'	'
Net income per common share-Diluted (usd per share)	$0.39	$0.40	$0.09	$0.21	$0.22	$0.09	$1.14	$0.29	'	'	'

Subsequent_Events_Details

Subsequent Events (Details) (21-25 West 34th Street, Subsequent Event, USD $)	1 Months Ended
In Millions, unless otherwise specified	Jan. 31, 2014
21-25 West 34th Street \| Subsequent Event	'
Subsequent Event [Line Items]	'
Ownership interest sold (as a percent)	50.00%
Consideration for sale of beneficial interest in real estate property	$114.90
Mortgage loan related to property sales	$100

Schedule_IIValuation_and_Quali1

Schedule II-Valuation and Qualifying Accounts (Details) (USD $)	12 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Tenant and other receivablesballowance	'	'	'
Changes in valuation allowance	'	'	'
Balance at Beginning of Year	$14,341	$11,326	$10,198
Additions Charged Against Operations	3,052	10,147	4,537
Uncollectible Accounts Written-off/Recovery	-68	-7,132	-3,409
Balance at End of Year	17,325	14,341	11,326
Deferred rent receivableballowance	'	'	'
Changes in valuation allowance	'	'	'
Balance at Beginning of Year	29,580	29,156	30,834
Additions Charged Against Operations	3,133	3,193	6,638
Uncollectible Accounts Written-off/Recovery	-2,380	-2,769	-8,316
Balance at End of Year	$30,333	$29,580	$29,156

Schedule_IIIReal_Estate_And_Ac1

Schedule III-Real Estate And Accumulated Depreciation (Details) (USD $)	Dec. 31, 2013		Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
In Thousands, unless otherwise specified	Dec. 31, 2013		Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Real Estate And Accumulated Depreciation	'		'	'	'
Encumbrances	$4,719,555		'	'	'
Initial Cost	'		'	'	'
Land	2,766,925		'	'	'
Building & Improvements	8,276,031		'	'	'
Cost Capitalized Subsequent To Acquisition	'		'	'	'
Land	265,601		'	'	'
Building & Improvements	1,025,223		'	'	'
Gross Amount at Which Carried at Close of Period	'		'	'	'
Land	3,032,526		'	'	'
Building & Improvements	9,301,254		'	'	'
Total	12,333,780		11,662,953	11,147,151	8,890,064
Accumulated Depreciation	1,646,240		1,393,323	1,136,603	916,293
673 First Avenue	'		'	'	'
Initial Cost	'		'	'	'
Building & Improvements	35,727	[1]	'	'	'
Cost Capitalized Subsequent To Acquisition	'		'	'	'
Building & Improvements	23,464	[1]	'	'	'
Gross Amount at Which Carried at Close of Period	'		'	'	'
Building & Improvements	59,191	[1]	'	'	'
Total	59,191	[1]	'	'	'
Accumulated Depreciation	20,019	[1]	'	'	'
420 Lexington Avenue	'		'	'	'
Real Estate And Accumulated Depreciation	'		'	'	'
Encumbrances	182,641	[1]	'	'	'
Initial Cost	'		'	'	'
Building & Improvements	107,832	[1]	'	'	'
Cost Capitalized Subsequent To Acquisition	'		'	'	'
Building & Improvements	169,790	[1]	'	'	'
Gross Amount at Which Carried at Close of Period	'		'	'	'
Building & Improvements	277,622	[1]	'	'	'
Total	277,622	[1]	'	'	'
Accumulated Depreciation	91,253	[1]	'	'	'
711 Third Avenue	'		'	'	'
Real Estate And Accumulated Depreciation	'		'	'	'
Encumbrances	120,000	[1]	'	'	'
Initial Cost	'		'	'	'
Land	19,844	[1]	'	'	'
Building & Improvements	42,499	[1]	'	'	'
Cost Capitalized Subsequent To Acquisition	'		'	'	'
Building & Improvements	35,029	[1]	'	'	'
Gross Amount at Which Carried at Close of Period	'		'	'	'
Land	19,844	[1]	'	'	'
Building & Improvements	77,528	[1]	'	'	'
Total	97,372	[1]	'	'	'
Accumulated Depreciation	29,359	[1]	'	'	'
555 W. 57th Street	'		'	'	'
Initial Cost	'		'	'	'
Land	18,846	[1]	'	'	'
Building & Improvements	78,704	[1]	'	'	'
Cost Capitalized Subsequent To Acquisition	'		'	'	'
Building & Improvements	43,084	[1]	'	'	'
Gross Amount at Which Carried at Close of Period	'		'	'	'
Land	18,846	[1]	'	'	'
Building & Improvements	121,788	[1]	'	'	'
Total	140,634	[1]	'	'	'
Accumulated Depreciation	44,318	[1]	'	'	'
317 Madison Avenue	'		'	'	'
Initial Cost	'		'	'	'
Land	21,205	[1]	'	'	'
Building & Improvements	85,559	[1]	'	'	'
Cost Capitalized Subsequent To Acquisition	'		'	'	'
Building & Improvements	28,821	[1]	'	'	'
Gross Amount at Which Carried at Close of Period	'		'	'	'
Land	21,205	[1]	'	'	'
Building & Improvements	114,380	[1]	'	'	'
Total	135,585	[1]	'	'	'
Accumulated Depreciation	49,963	[1]	'	'	'
220 East 42nd Street	'		'	'	'
Real Estate And Accumulated Depreciation	'		'	'	'
Encumbrances	275,000	[1]	'	'	'
Initial Cost	'		'	'	'
Land	50,373	[1]	'	'	'
Building & Improvements	203,727	[1]	'	'	'
Cost Capitalized Subsequent To Acquisition	'		'	'	'
Land	635	[1]	'	'	'
Building & Improvements	52,189	[1]	'	'	'
Gross Amount at Which Carried at Close of Period	'		'	'	'
Land	51,008	[1]	'	'	'
Building & Improvements	255,916	[1]	'	'	'
Total	306,924	[1]	'	'	'
Accumulated Depreciation	72,157	[1]	'	'	'
461 Fifth Avenue	'		'	'	'
Initial Cost	'		'	'	'
Building & Improvements	62,695	[1]	'	'	'
Cost Capitalized Subsequent To Acquisition	'		'	'	'
Building & Improvements	8,003	[1]	'	'	'
Gross Amount at Which Carried at Close of Period	'		'	'	'
Building & Improvements	70,698	[1]	'	'	'
Total	70,698	[1]	'	'	'
Accumulated Depreciation	19,807	[1]	'	'	'
750 Third Avenue	'		'	'	'
Initial Cost	'		'	'	'
Land	51,093	[1]	'	'	'
Building & Improvements	205,972	[1]	'	'	'
Cost Capitalized Subsequent To Acquisition	'		'	'	'
Building & Improvements	33,895	[1]	'	'	'
Gross Amount at Which Carried at Close of Period	'		'	'	'
Land	51,093	[1]	'	'	'
Building & Improvements	239,867	[1]	'	'	'
Total	290,960	[1]	'	'	'
Accumulated Depreciation	62,379	[1]	'	'	'
625 Madison Avenue	'		'	'	'
Real Estate And Accumulated Depreciation	'		'	'	'
Encumbrances	120,830	[1]	'	'	'
Initial Cost	'		'	'	'
Building & Improvements	246,673	[1]	'	'	'
Cost Capitalized Subsequent To Acquisition	'		'	'	'
Building & Improvements	33,212	[1]	'	'	'
Gross Amount at Which Carried at Close of Period	'		'	'	'
Building & Improvements	279,885	[1]	'	'	'
Total	279,885	[1]	'	'	'
Accumulated Depreciation	69,230	[1]	'	'	'
485 Lexington Avenue	'		'	'	'
Real Estate And Accumulated Depreciation	'		'	'	'
Encumbrances	450,000	[1]	'	'	'
Initial Cost	'		'	'	'
Land	77,517	[1]	'	'	'
Building & Improvements	326,825	[1]	'	'	'
Cost Capitalized Subsequent To Acquisition	'		'	'	'
Land	765	[1]	'	'	'
Building & Improvements	87,964	[1]	'	'	'
Gross Amount at Which Carried at Close of Period	'		'	'	'
Land	78,282	[1]	'	'	'
Building & Improvements	414,789	[1]	'	'	'
Total	493,071	[1]	'	'	'
Accumulated Depreciation	112,976	[1]	'	'	'
609 Fifth Avenue	'		'	'	'
Initial Cost	'		'	'	'
Land	36,677	[1]	'	'	'
Building & Improvements	145,954	[1]	'	'	'
Cost Capitalized Subsequent To Acquisition	'		'	'	'
Building & Improvements	7,230	[1]	'	'	'
Gross Amount at Which Carried at Close of Period	'		'	'	'
Land	36,677	[1]	'	'	'
Building & Improvements	153,184	[1]	'	'	'
Total	189,861	[1]	'	'	'
Accumulated Depreciation	28,481	[1]	'	'	'
120 West 45th Street	'		'	'	'
Real Estate And Accumulated Depreciation	'		'	'	'
Encumbrances	170,000	[1]	'	'	'
Initial Cost	'		'	'	'
Land	60,766	[1]	'	'	'
Building & Improvements	250,922	[1]	'	'	'
Cost Capitalized Subsequent To Acquisition	'		'	'	'
Building & Improvements	18,090	[1]	'	'	'
Gross Amount at Which Carried at Close of Period	'		'	'	'
Land	60,766	[1]	'	'	'
Building & Improvements	269,012	[1]	'	'	'
Total	329,778	[1]	'	'	'
Accumulated Depreciation	49,892	[1]	'	'	'
810 Seventh Avenue	'		'	'	'
Initial Cost	'		'	'	'
Land	114,077	[1]	'	'	'
Building & Improvements	476,386	[1]	'	'	'
Cost Capitalized Subsequent To Acquisition	'		'	'	'
Building & Improvements	44,614	[1]	'	'	'
Gross Amount at Which Carried at Close of Period	'		'	'	'
Land	114,077	[1]	'	'	'
Building & Improvements	521,000	[1]	'	'	'
Total	635,077	[1]	'	'	'
Accumulated Depreciation	98,988	[1]	'	'	'
919 Third Avenue	'		'	'	'
Real Estate And Accumulated Depreciation	'		'	'	'
Encumbrances	500,000	[1],[2]	'	'	'
Initial Cost	'		'	'	'
Land	223,529	[1],[2]	'	'	'
Building & Improvements	1,033,198	[1],[2]	'	'	'
Cost Capitalized Subsequent To Acquisition	'		'	'	'
Land	35,410	[1],[2]	'	'	'
Building & Improvements	16,799	[1],[2]	'	'	'
Gross Amount at Which Carried at Close of Period	'		'	'	'
Land	258,939	[1],[2]	'	'	'
Building & Improvements	1,049,997	[1],[2]	'	'	'
Total	1,308,936	[1],[2]	'	'	'
Accumulated Depreciation	188,175	[1],[2]	'	'	'
1185 Avenue of the Americas	'		'	'	'
Initial Cost	'		'	'	'
Building & Improvements	728,213	[1]	'	'	'
Cost Capitalized Subsequent To Acquisition	'		'	'	'
Building & Improvements	32,402	[1]	'	'	'
Gross Amount at Which Carried at Close of Period	'		'	'	'
Building & Improvements	760,615	[1]	'	'	'
Total	760,615	[1]	'	'	'
Accumulated Depreciation	152,278	[1]	'	'	'
1350 Avenue of the Americas	'		'	'	'
Initial Cost	'		'	'	'
Land	91,038	[1]	'	'	'
Building & Improvements	380,744	[1]	'	'	'
Cost Capitalized Subsequent To Acquisition	'		'	'	'
Building & Improvements	26,376	[1]	'	'	'
Gross Amount at Which Carried at Close of Period	'		'	'	'
Land	91,038	[1]	'	'	'
Building & Improvements	407,120	[1]	'	'	'
Total	498,158	[1]	'	'	'
Accumulated Depreciation	78,379	[1]	'	'	'
1100 King Street - 1-7 International Drive	'		'	'	'
Initial Cost	'		'	'	'
Land	49,392	[3]	'	'	'
Building & Improvements	104,376	[3]	'	'	'
Cost Capitalized Subsequent To Acquisition	'		'	'	'
Land	2,473	[3]	'	'	'
Building & Improvements	16,810	[3]	'	'	'
Gross Amount at Which Carried at Close of Period	'		'	'	'
Land	51,865	[3]	'	'	'
Building & Improvements	121,186	[3]	'	'	'
Total	173,051	[3]	'	'	'
Accumulated Depreciation	26,659	[3]	'	'	'
520 White Plains Road	'		'	'	'
Initial Cost	'		'	'	'
Land	6,324	[3]	'	'	'
Building & Improvements	26,096	[3]	'	'	'
Cost Capitalized Subsequent To Acquisition	'		'	'	'
Building & Improvements	4,352	[3]	'	'	'
Gross Amount at Which Carried at Close of Period	'		'	'	'
Land	6,324	[3]	'	'	'
Building & Improvements	30,448	[3]	'	'	'
Total	36,772	[3]	'	'	'
Accumulated Depreciation	6,573	[3]	'	'	'
115-117 Stevens Avenue	'		'	'	'
Initial Cost	'		'	'	'
Land	5,933	[3]	'	'	'
Building & Improvements	23,826	[3]	'	'	'
Cost Capitalized Subsequent To Acquisition	'		'	'	'
Building & Improvements	5,891	[3]	'	'	'
Gross Amount at Which Carried at Close of Period	'		'	'	'
Land	5,933	[3]	'	'	'
Building & Improvements	29,717	[3]	'	'	'
Total	35,650	[3]	'	'	'
Accumulated Depreciation	6,825	[3]	'	'	'
100 Summit Lake Drive	'		'	'	'
Initial Cost	'		'	'	'
Land	10,526	[3]	'	'	'
Building & Improvements	43,109	[3]	'	'	'
Cost Capitalized Subsequent To Acquisition	'		'	'	'
Building & Improvements	7,036	[3]	'	'	'
Gross Amount at Which Carried at Close of Period	'		'	'	'
Land	10,526	[3]	'	'	'
Building & Improvements	50,145	[3]	'	'	'
Total	60,671	[3]	'	'	'
Accumulated Depreciation	10,089	[3]	'	'	'
200 Summit Lake Drive	'		'	'	'
Initial Cost	'		'	'	'
Land	11,183	[3]	'	'	'
Building & Improvements	47,906	[3]	'	'	'
Cost Capitalized Subsequent To Acquisition	'		'	'	'
Building & Improvements	6,222	[3]	'	'	'
Gross Amount at Which Carried at Close of Period	'		'	'	'
Land	11,183	[3]	'	'	'
Building & Improvements	54,128	[3]	'	'	'
Total	65,311	[3]	'	'	'
Accumulated Depreciation	10,388	[3]	'	'	'
500 Summit Lake Drive	'		'	'	'
Initial Cost	'		'	'	'
Land	9,777	[3]	'	'	'
Building & Improvements	39,048	[3]	'	'	'
Cost Capitalized Subsequent To Acquisition	'		'	'	'
Building & Improvements	5,508	[3]	'	'	'
Gross Amount at Which Carried at Close of Period	'		'	'	'
Land	9,777	[3]	'	'	'
Building & Improvements	44,556	[3]	'	'	'
Total	54,333	[3]	'	'	'
Accumulated Depreciation	8,023	[3]	'	'	'
140 Grand Street	'		'	'	'
Initial Cost	'		'	'	'
Land	6,865	[3]	'	'	'
Building & Improvements	28,264	[3]	'	'	'
Cost Capitalized Subsequent To Acquisition	'		'	'	'
Building & Improvements	4,048	[3]	'	'	'
Gross Amount at Which Carried at Close of Period	'		'	'	'
Land	6,865	[3]	'	'	'
Building & Improvements	32,312	[3]	'	'	'
Total	39,177	[3]	'	'	'
Accumulated Depreciation	6,608	[3]	'	'	'
360 Hamilton Avenue	'		'	'	'
Initial Cost	'		'	'	'
Land	29,497	[3]	'	'	'
Building & Improvements	118,250	[3]	'	'	'
Cost Capitalized Subsequent To Acquisition	'		'	'	'
Building & Improvements	11,545	[3]	'	'	'
Gross Amount at Which Carried at Close of Period	'		'	'	'
Land	29,497	[3]	'	'	'
Building & Improvements	129,795	[3]	'	'	'
Total	159,292	[3]	'	'	'
Accumulated Depreciation	25,138	[3]	'	'	'
1-6 Landmark Square	'		'	'	'
Real Estate And Accumulated Depreciation	'		'	'	'
Encumbrances	82,909	[4]	'	'	'
Initial Cost	'		'	'	'
Land	50,947	[4]	'	'	'
Building & Improvements	195,167	[4]	'	'	'
Cost Capitalized Subsequent To Acquisition	'		'	'	'
Building & Improvements	23,919	[4]	'	'	'
Gross Amount at Which Carried at Close of Period	'		'	'	'
Land	50,947	[4]	'	'	'
Building & Improvements	219,086	[4]	'	'	'
Total	270,033	[4]	'	'	'
Accumulated Depreciation	41,223	[4]	'	'	'
7 Landmark Square	'		'	'	'
Initial Cost	'		'	'	'
Land	2,088	[4]	'	'	'
Building & Improvements	7,748	[4]	'	'	'
Cost Capitalized Subsequent To Acquisition	'		'	'	'
Land	-367	[4]	'	'	'
Building & Improvements	-134	[4]	'	'	'
Gross Amount at Which Carried at Close of Period	'		'	'	'
Land	1,721	[4]	'	'	'
Building & Improvements	7,614	[4]	'	'	'
Total	9,335	[4]	'	'	'
Accumulated Depreciation	403	[4]	'	'	'
680 Washington Boulevard	'		'	'	'
Initial Cost	'		'	'	'
Land	11,696	[2],[4]	'	'	'
Building & Improvements	45,364	[2],[4]	'	'	'
Cost Capitalized Subsequent To Acquisition	'		'	'	'
Building & Improvements	4,218	[2],[4]	'	'	'
Gross Amount at Which Carried at Close of Period	'		'	'	'
Land	11,696	[2],[4]	'	'	'
Building & Improvements	49,582	[2],[4]	'	'	'
Total	61,278	[2],[4]	'	'	'
Accumulated Depreciation	9,539	[2],[4]	'	'	'
Interest in property (as a percent)	51.00%		'	'	'
750 Washington Boulevard	'		'	'	'
Initial Cost	'		'	'	'
Land	16,916	[2],[4]	'	'	'
Building & Improvements	68,849	[2],[4]	'	'	'
Cost Capitalized Subsequent To Acquisition	'		'	'	'
Building & Improvements	4,854	[2],[4]	'	'	'
Gross Amount at Which Carried at Close of Period	'		'	'	'
Land	16,916	[2],[4]	'	'	'
Building & Improvements	73,703	[2],[4]	'	'	'
Total	90,619	[2],[4]	'	'	'
Accumulated Depreciation	14,140	[2],[4]	'	'	'
1010 Washington Boulevard	'		'	'	'
Initial Cost	'		'	'	'
Land	7,747	[4]	'	'	'
Building & Improvements	30,423	[4]	'	'	'
Cost Capitalized Subsequent To Acquisition	'		'	'	'
Building & Improvements	3,667	[4]	'	'	'
Gross Amount at Which Carried at Close of Period	'		'	'	'
Land	7,747	[4]	'	'	'
Building & Improvements	34,090	[4]	'	'	'
Total	41,837	[4]	'	'	'
Accumulated Depreciation	6,507	[4]	'	'	'
500 West Putnam	'		'	'	'
Real Estate And Accumulated Depreciation	'		'	'	'
Encumbrances	23,529	[4]	'	'	'
Initial Cost	'		'	'	'
Land	11,210	[4]	'	'	'
Building & Improvements	44,782	[4]	'	'	'
Cost Capitalized Subsequent To Acquisition	'		'	'	'
Building & Improvements	4,594	[4]	'	'	'
Gross Amount at Which Carried at Close of Period	'		'	'	'
Land	11,210	[4]	'	'	'
Building & Improvements	49,376	[4]	'	'	'
Total	60,586	[4]	'	'	'
Accumulated Depreciation	8,837	[4]	'	'	'
150 Grand Street	'		'	'	'
Initial Cost	'		'	'	'
Land	1,371		'	'	'
Building & Improvements	5,446		'	'	'
Cost Capitalized Subsequent To Acquisition	'		'	'	'
Building & Improvements	10,485		'	'	'
Gross Amount at Which Carried at Close of Period	'		'	'	'
Land	1,371		'	'	'
Building & Improvements	15,931		'	'	'
Total	17,302		'	'	'
Accumulated Depreciation	1,137		'	'	'
400 Summit Lake Drive	'		'	'	'
Initial Cost	'		'	'	'
Land	38,889	[3]	'	'	'
Cost Capitalized Subsequent To Acquisition	'		'	'	'
Land	285	[3]	'	'	'
Building & Improvements	1	[3]	'	'	'
Gross Amount at Which Carried at Close of Period	'		'	'	'
Land	39,174	[3]	'	'	'
Building & Improvements	1	[3]	'	'	'
Total	39,175	[3]	'	'	'
Accumulated Depreciation	1	[3]	'	'	'
331 Madison Avenue	'		'	'	'
Initial Cost	'		'	'	'
Land	14,763	[1]	'	'	'
Building & Improvements	65,241	[1]	'	'	'
Cost Capitalized Subsequent To Acquisition	'		'	'	'
Land	0	[1]	'	'	'
Building & Improvements	902	[1]	'	'	'
Gross Amount at Which Carried at Close of Period	'		'	'	'
Land	14,763	[1]	'	'	'
Building & Improvements	66,143	[1]	'	'	'
Total	80,906	[1]	'	'	'
Accumulated Depreciation	12,419	[1]	'	'	'
1055 Washington Boulevard	'		'	'	'
Initial Cost	'		'	'	'
Land	13,516	[4]	'	'	'
Building & Improvements	53,228	[4]	'	'	'
Cost Capitalized Subsequent To Acquisition	'		'	'	'
Building & Improvements	3,118	[4]	'	'	'
Gross Amount at Which Carried at Close of Period	'		'	'	'
Land	13,516	[4]	'	'	'
Building & Improvements	56,346	[4]	'	'	'
Total	69,862	[4]	'	'	'
Accumulated Depreciation	10,700	[4]	'	'	'
One Madison Avenue	'		'	'	'
Real Estate And Accumulated Depreciation	'		'	'	'
Encumbrances	587,336	[1]	'	'	'
Initial Cost	'		'	'	'
Land	172,641	[1]	'	'	'
Building & Improvements	654,394	[1]	'	'	'
Cost Capitalized Subsequent To Acquisition	'		'	'	'
Land	905	[1]	'	'	'
Building & Improvements	14,384	[1]	'	'	'
Gross Amount at Which Carried at Close of Period	'		'	'	'
Land	173,546	[1]	'	'	'
Building & Improvements	668,778	[1]	'	'	'
Total	842,324	[1]	'	'	'
Accumulated Depreciation	107,764	[1]	'	'	'
125 Chubb Way	'		'	'	'
Initial Cost	'		'	'	'
Land	5,884	[5]	'	'	'
Building & Improvements	25,958	[5]	'	'	'
Cost Capitalized Subsequent To Acquisition	'		'	'	'
Building & Improvements	23,478	[5]	'	'	'
Gross Amount at Which Carried at Close of Period	'		'	'	'
Land	5,884	[5]	'	'	'
Building & Improvements	49,436	[5]	'	'	'
Total	55,320	[5]	'	'	'
Accumulated Depreciation	3,372	[5]	'	'	'
100 Church	'		'	'	'
Real Estate And Accumulated Depreciation	'		'	'	'
Encumbrances	230,000	[1]	'	'	'
Initial Cost	'		'	'	'
Land	32,494	[1]	'	'	'
Building & Improvements	79,996	[1]	'	'	'
Cost Capitalized Subsequent To Acquisition	'		'	'	'
Land	2,500	[1]	'	'	'
Building & Improvements	81,109	[1]	'	'	'
Gross Amount at Which Carried at Close of Period	'		'	'	'
Land	34,994	[1]	'	'	'
Building & Improvements	161,105	[1]	'	'	'
Total	196,099	[1]	'	'	'
Accumulated Depreciation	21,198	[1]	'	'	'
125 Park Avenue	'		'	'	'
Real Estate And Accumulated Depreciation	'		'	'	'
Encumbrances	146,250	[1]	'	'	'
Initial Cost	'		'	'	'
Land	120,900	[1]	'	'	'
Building & Improvements	189,714	[1]	'	'	'
Cost Capitalized Subsequent To Acquisition	'		'	'	'
Building & Improvements	29,893	[1]	'	'	'
Gross Amount at Which Carried at Close of Period	'		'	'	'
Land	120,900	[1]	'	'	'
Building & Improvements	219,607	[1]	'	'	'
Total	340,507	[1]	'	'	'
Accumulated Depreciation	26,598	[1]	'	'	'
2 Herald Square	'		'	'	'
Real Estate And Accumulated Depreciation	'		'	'	'
Encumbrances	191,250	[1]	'	'	'
Initial Cost	'		'	'	'
Land	92,655	[1]	'	'	'
Cost Capitalized Subsequent To Acquisition	'		'	'	'
Land	100,633	[1]	'	'	'
Gross Amount at Which Carried at Close of Period	'		'	'	'
Land	193,288	[1]	'	'	'
Total	193,288	[1]	'	'	'
885 Third Avenue	'		'	'	'
Real Estate And Accumulated Depreciation	'		'	'	'
Encumbrances	267,650	[1]	'	'	'
Initial Cost	'		'	'	'
Land	131,766	[1]	'	'	'
Cost Capitalized Subsequent To Acquisition	'		'	'	'
Land	110,771	[1]	'	'	'
Gross Amount at Which Carried at Close of Period	'		'	'	'
Land	242,537	[1]	'	'	'
Total	242,537	[1]	'	'	'
Williamsburg	'		'	'	'
Initial Cost	'		'	'	'
Land	3,677	[6]	'	'	'
Building & Improvements	14,708	[6]	'	'	'
Cost Capitalized Subsequent To Acquisition	'		'	'	'
Land	2,523	[6]	'	'	'
Building & Improvements	-4,550	[6]	'	'	'
Gross Amount at Which Carried at Close of Period	'		'	'	'
Land	6,200	[6]	'	'	'
Building & Improvements	10,158	[6]	'	'	'
Total	16,358	[6]	'	'	'
Accumulated Depreciation	821	[6]	'	'	'
1515 Broadway	'		'	'	'
Real Estate And Accumulated Depreciation	'		'	'	'
Encumbrances	900,000	[1]	'	'	'
Initial Cost	'		'	'	'
Land	462,700	[1]	'	'	'
Building & Improvements	707,938	[1]	'	'	'
Cost Capitalized Subsequent To Acquisition	'		'	'	'
Land	1,145	[1]	'	'	'
Building & Improvements	27,119	[1]	'	'	'
Gross Amount at Which Carried at Close of Period	'		'	'	'
Land	463,845	[1]	'	'	'
Building & Improvements	735,057	[1]	'	'	'
Total	1,198,902	[1]	'	'	'
Accumulated Depreciation	63,103	[1]	'	'	'
110 East 42nd Street	'		'	'	'
Initial Cost	'		'	'	'
Land	34,000	[1]	'	'	'
Building & Improvements	46,411	[1]	'	'	'
Cost Capitalized Subsequent To Acquisition	'		'	'	'
Land	2,354	[1]	'	'	'
Building & Improvements	13,490	[1]	'	'	'
Gross Amount at Which Carried at Close of Period	'		'	'	'
Land	36,354	[1]	'	'	'
Building & Improvements	59,901	[1]	'	'	'
Total	96,255	[1]	'	'	'
Accumulated Depreciation	6,371	[1]	'	'	'
180 Maiden Lane	'		'	'	'
Real Estate And Accumulated Depreciation	'		'	'	'
Encumbrances	262,706	[1],[7]	'	'	'
Initial Cost	'		'	'	'
Land	191,523	[1],[7]	'	'	'
Building & Improvements	233,230	[1],[7]	'	'	'
Cost Capitalized Subsequent To Acquisition	'		'	'	'
Building & Improvements	4,871	[1],[7]	'	'	'
Gross Amount at Which Carried at Close of Period	'		'	'	'
Land	191,523	[1],[7]	'	'	'
Building & Improvements	238,101	[1],[7]	'	'	'
Total	429,624	[1],[7]	'	'	'
Accumulated Depreciation	18,599	[1],[7]	'	'	'
Interest in property (as a percent)	49.90%		'	'	'
51 East 42nd Street	'		'	'	'
Initial Cost	'		'	'	'
Land	44,095	[1]	'	'	'
Building & Improvements	33,470	[1]	'	'	'
Cost Capitalized Subsequent To Acquisition	'		'	'	'
Land	5	[1]	'	'	'
Building & Improvements	2,255	[1]	'	'	'
Gross Amount at Which Carried at Close of Period	'		'	'	'
Land	44,100	[1]	'	'	'
Building & Improvements	35,725	[1]	'	'	'
Total	79,825	[1]	'	'	'
Accumulated Depreciation	2,440	[1]	'	'	'
400 East 57th Street	'		'	'	'
Real Estate And Accumulated Depreciation	'		'	'	'
Encumbrances	70,000	[1],[8]	'	'	'
Initial Cost	'		'	'	'
Land	39,780	[1],[8]	'	'	'
Building & Improvements	69,895	[1],[8]	'	'	'
Cost Capitalized Subsequent To Acquisition	'		'	'	'
Building & Improvements	6,027	[1],[8]	'	'	'
Gross Amount at Which Carried at Close of Period	'		'	'	'
Land	39,780	[1],[8]	'	'	'
Building & Improvements	75,922	[1],[8]	'	'	'
Total	115,702	[1],[8]	'	'	'
Accumulated Depreciation	3,571	[1],[8]	'	'	'
400 East 58th Street	'		'	'	'
Real Estate And Accumulated Depreciation	'		'	'	'
Encumbrances	30,000	[1],[8]	'	'	'
Initial Cost	'		'	'	'
Land	17,549	[1],[8]	'	'	'
Building & Improvements	30,916	[1],[8]	'	'	'
Cost Capitalized Subsequent To Acquisition	'		'	'	'
Building & Improvements	2,388	[1],[8]	'	'	'
Gross Amount at Which Carried at Close of Period	'		'	'	'
Land	17,549	[1],[8]	'	'	'
Building & Improvements	33,304	[1],[8]	'	'	'
Total	50,853	[1],[8]	'	'	'
Accumulated Depreciation	1,552	[1],[8]	'	'	'
Interest in property (as a percent)	80.00%		'	'	'
752 Madison Avenue	'		'	'	'
Initial Cost	'		'	'	'
Building & Improvements	7,131	[1],[8]	'	'	'
Cost Capitalized Subsequent To Acquisition	'		'	'	'
Building & Improvements	10	[1],[8]	'	'	'
Gross Amount at Which Carried at Close of Period	'		'	'	'
Building & Improvements	7,141	[1],[8]	'	'	'
Total	7,141	[1],[8]	'	'	'
Accumulated Depreciation	423	[1],[8]	'	'	'
762 Madison Avenue	'		'	'	'
Real Estate And Accumulated Depreciation	'		'	'	'
Encumbrances	8,211	[1],[8]	'	'	'
Initial Cost	'		'	'	'
Land	6,153	[1],[8]	'	'	'
Building & Improvements	10,461	[1],[8]	'	'	'
Cost Capitalized Subsequent To Acquisition	'		'	'	'
Building & Improvements	89	[1],[8]	'	'	'
Gross Amount at Which Carried at Close of Period	'		'	'	'
Land	6,153	[1],[8]	'	'	'
Building & Improvements	10,550	[1],[8]	'	'	'
Total	16,703	[1],[8]	'	'	'
Accumulated Depreciation	524	[1],[8]	'	'	'
19-21 East 65th Street	'		'	'	'
Initial Cost	'		'	'	'
Building & Improvements	7,389	[1],[8]	'	'	'
Cost Capitalized Subsequent To Acquisition	'		'	'	'
Building & Improvements	151	[1],[8]	'	'	'
Gross Amount at Which Carried at Close of Period	'		'	'	'
Building & Improvements	7,540	[1],[8]	'	'	'
Total	7,540	[1],[8]	'	'	'
Accumulated Depreciation	365	[1],[8]	'	'	'
304 Park Avenue	'		'	'	'
Initial Cost	'		'	'	'
Land	54,189	[1]	'	'	'
Building & Improvements	75,619	[1]	'	'	'
Cost Capitalized Subsequent To Acquisition	'		'	'	'
Land	300	[1]	'	'	'
Building & Improvements	4,198	[1]	'	'	'
Gross Amount at Which Carried at Close of Period	'		'	'	'
Land	54,489	[1]	'	'	'
Building & Improvements	79,817	[1]	'	'	'
Total	134,306	[1]	'	'	'
Accumulated Depreciation	4,726	[1]	'	'	'
635 Sixth Avenue	'		'	'	'
Initial Cost	'		'	'	'
Land	24,180	[1]	'	'	'
Building & Improvements	37,158	[1]	'	'	'
Cost Capitalized Subsequent To Acquisition	'		'	'	'
Land	163	[1]	'	'	'
Building & Improvements	18,071	[1]	'	'	'
Gross Amount at Which Carried at Close of Period	'		'	'	'
Land	24,343	[1]	'	'	'
Building & Improvements	55,229	[1]	'	'	'
Total	79,572	[1]	'	'	'
Accumulated Depreciation	0	[1]	'	'	'
641 Sixth Avenue	'		'	'	'
Initial Cost	'		'	'	'
Land	45,668	[1]	'	'	'
Building & Improvements	67,316	[1]	'	'	'
Cost Capitalized Subsequent To Acquisition	'		'	'	'
Land	308	[1]	'	'	'
Building & Improvements	768	[1]	'	'	'
Gross Amount at Which Carried at Close of Period	'		'	'	'
Land	45,976	[1]	'	'	'
Building & Improvements	68,084	[1]	'	'	'
Total	114,060	[1]	'	'	'
Accumulated Depreciation	2,922	[1]	'	'	'
1080 Amsterdam	'		'	'	'
Initial Cost	'		'	'	'
Building & Improvements	27,445	[1],[9]	'	'	'
Cost Capitalized Subsequent To Acquisition	'		'	'	'
Land	0	[1],[9]	'	'	'
Building & Improvements	8,450	[1],[9]	'	'	'
Gross Amount at Which Carried at Close of Period	'		'	'	'
Building & Improvements	35,895	[1],[9]	'	'	'
Total	35,895	[1],[9]	'	'	'
Interest in property (as a percent)	87.50%		'	'	'
131-137 Spring Street	'		'	'	'
Initial Cost	'		'	'	'
Land	27,021	[1]	'	'	'
Building & Improvements	105,342	[1]	'	'	'
Cost Capitalized Subsequent To Acquisition	'		'	'	'
Land	154	[1]	'	'	'
Building & Improvements	637	[1]	'	'	'
Gross Amount at Which Carried at Close of Period	'		'	'	'
Land	27,175	[1]	'	'	'
Building & Improvements	105,979	[1]	'	'	'
Total	133,154	[1]	'	'	'
Accumulated Depreciation	2,826	[1]	'	'	'
985-987 Third Avenue	'		'	'	'
Initial Cost	'		'	'	'
Land	5,400	[1]	'	'	'
Building & Improvements	12,600	[1]	'	'	'
Cost Capitalized Subsequent To Acquisition	'		'	'	'
Land	3,635	[1]	'	'	'
Building & Improvements	248	[1]	'	'	'
Gross Amount at Which Carried at Close of Period	'		'	'	'
Land	9,035	[1]	'	'	'
Building & Improvements	12,848	[1]	'	'	'
Total	21,883	[1]	'	'	'
248-252 Bedford Avenue	'		'	'	'
Real Estate And Accumulated Depreciation	'		'	'	'
Encumbrances	22,000	[10],[6]	'	'	'
Initial Cost	'		'	'	'
Land	10,865	[10],[6]	'	'	'
Building & Improvements	44,035	[10],[6]	'	'	'
Cost Capitalized Subsequent To Acquisition	'		'	'	'
Building & Improvements	2,106	[10],[6]	'	'	'
Gross Amount at Which Carried at Close of Period	'		'	'	'
Land	10,865	[10],[6]	'	'	'
Building & Improvements	46,141	[10],[6]	'	'	'
Total	57,006	[10],[6]	'	'	'
Accumulated Depreciation	490	[10],[6]	'	'	'
Interest in property (as a percent)	90.00%		'	'	'
16 Court Street	'		'	'	'
Real Estate And Accumulated Depreciation	'		'	'	'
Encumbrances	79,243	[6]	'	'	'
Initial Cost	'		'	'	'
Land	19,217	[6]	'	'	'
Building & Improvements	63,210	[6]	'	'	'
Cost Capitalized Subsequent To Acquisition	'		'	'	'
Land	0	[6]	'	'	'
Building & Improvements	2,207	[6]	'	'	'
Gross Amount at Which Carried at Close of Period	'		'	'	'
Land	19,217	[6]	'	'	'
Building & Improvements	65,417	[6]	'	'	'
Total	84,634	[6]	'	'	'
Accumulated Depreciation	1,736	[6]	'	'	'
315 West 33rd Street	'		'	'	'
Initial Cost	'		'	'	'
Land	116,033	[1]	'	'	'
Building & Improvements	270,742	[1]	'	'	'
Gross Amount at Which Carried at Close of Period	'		'	'	'
Land	116,033	[1]	'	'	'
Building & Improvements	270,742	[1]	'	'	'
Total	386,775	[1]	'	'	'
Accumulated Depreciation	921	[1]	'	'	'
Retail Properties on Fifth Avenue	'		'	'	'
Initial Cost	'		'	'	'
Land	43,800	[1]	'	'	'
Building & Improvements	102,200	[1]	'	'	'
Gross Amount at Which Carried at Close of Period	'		'	'	'
Land	43,800	[1]	'	'	'
Building & Improvements	102,200	[1]	'	'	'
Total	146,000	[1]	'	'	'
Accumulated Depreciation	284	[1]	'	'	'
Other	'		'	'	'
Initial Cost	'		'	'	'
Land	1,130	[11]	'	'	'
Cost Capitalized Subsequent To Acquisition	'		'	'	'
Land	1,004	[11]	'	'	'
Building & Improvements	9,826	[11]	'	'	'
Gross Amount at Which Carried at Close of Period	'		'	'	'
Land	2,134	[11]	'	'	'
Building & Improvements	9,826	[11]	'	'	'
Total	11,960	[11]	'	'	'
Accumulated Depreciation	$2,771	[11]	'	'	'

[1]	Property located in New York, New York.
[2]	We own a 51% interest in this property.
[3]	Property located in Westchester County, New York.
[4]	Property located in Connecticut.
[5]	Property located in New Jersey.
[6]	Property located in Brooklyn, New York.
[7]	We own a 49.9% interest in this property.
[8]	We own a 80.0% interest in this property.
[9]	We own a 87.5% interest in this property.
[10]	We own a 90.0% interest in this property.
[11]	Other includes tenant improvements at eEmerge, capitalized interest and corporate improvements.

Schedule_IIIReal_Estate_And_Ac2

Schedule III-Real Estate And Accumulated Depreciation (Details 2) (USD $)	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Changes in real estate	'	'	'
Balance at beginning of year	$11,662,953,000	$11,147,151,000	$8,890,064,000
Property acquisitions	702,717,000	649,445,000	2,276,308,000
Improvements	199,141,000	146,410,000	162,875,000
Retirements/disposals/deconsolidation	-231,031,000	-280,053,000	-182,096,000
Balance at end of year	12,333,780,000	11,662,953,000	11,147,151,000
Aggregate cost of land, buildings and improvements, before depreciation, for Federal income tax purposes	8,600,000,000	'	'
Changes in accumulated depreciation, exclusive of amounts relating to equipment, autos, and furniture and fixtures	'	'	'
Balance at beginning of year	1,393,323,000	1,136,603,000	916,293,000
Depreciation for year	286,776,000	288,560,000	245,421,000
Retirements/disposals/deconsolidation	-33,859,000	-31,840,000	-25,111,000
Balance at end of year	$1,646,240,000	$1,393,323,000	$1,136,603,000