Consolidated Balance Sheets - USD ($) $ in Thousands	Dec. 31, 2015	Dec. 31, 2014
Commercial real estate properties, at cost:
Land and land interests	$ 4,779,159	$ 3,844,518
Building and improvements	10,423,739	8,778,593
Building leasehold and improvements	1,431,259	1,418,585
Properties under capital lease	47,445	27,445
Total commercial real estate properties, at cost	16,681,602	14,069,141
Less: accumulated depreciation	(2,060,706)	(1,905,165)
Total commercial real estate properties, net	14,620,896	12,163,976
Assets held for sale	34,981	462,430
Cash and cash equivalents	255,399	281,409
Restricted cash	233,578	149,176
Investments in marketable securities	45,138	39,429
Tenant and other receivables, net of allowance of $17,618 and $18,068 in 2015 and 2014, respectively	63,491	57,369
Related party receivables	10,650	11,735
Deferred rents receivable, net of allowance of $21,730 and $27,411 in 2015 and 2014, respectively	498,776	374,944
Debt and preferred equity investments, net of discounts and deferred origination fees of $18,759 and $19,172 in 2015 and 2014, respectively	1,670,020	1,408,804
Investments in unconsolidated joint ventures	1,203,858	1,172,020
Deferred costs, net	370,435	327,962
Other assets	850,719	647,333
Total assets	19,857,941	17,096,587
Liabilities
Mortgages and other loans payable	6,992,504	5,586,709
Revolving credit facility	994,000	385,000
Term loan and senior unsecured notes	2,319,244	2,107,078
Accrued interest payable and other liabilities	210,883	137,634
Accounts payable and accrued expenses	196,213	173,246
Deferred revenue	399,102	187,148
Capital lease obligations	41,360	20,822
Deferred land leases payable	1,783	1,215
Dividend and distributions payable	79,790	64,393
Security deposits	68,023	66,614
Liabilities related to assets held for sale	29,000	266,873
Junior subordinated deferrable interest debentures held by trusts that issued trust preferred securities	100,000	100,000
Total liabilities	$ 11,431,902	$ 9,096,732
Commitments and contingencies
Noncontrolling interests in Operating Partnership	$ 424,206	$ 469,524
Preferred units	282,516	71,115
Equity
Common stock, $0.01 par value, 160,000 shares authorized and 100,063 and 97,325 issued and outstanding at December 31, 2015 and 2014, respectively (including 87 shares held in treasury at December 31, 2015)	1,001	974
Additional paid-in-capital	5,439,735	5,113,759
Treasury stock at cost	(10,000)	0
Accumulated other comprehensive loss	(8,749)	(6,980)
Retained earnings	1,643,546	1,607,689
Total SL Green stockholders' equity	7,287,465	6,937,374
Noncontrolling interests in other partnerships	431,852	521,842
Total equity	7,719,317	7,459,216
SL Green stockholders equity:
Total liabilities and equity/capital	19,857,941	17,096,587
Series I Preferred Stock
Equity
Series I Preferred Stock, $0.01 par value, $25.00 liquidation preference, 9,200 issued and outstanding at both December 31, 2015 and 2014	221,932	221,932
SL Green Operating Partnership
Commercial real estate properties, at cost:
Land and land interests	4,779,159	3,844,518
Building and improvements	10,423,739	8,778,593
Building leasehold and improvements	1,431,259	1,418,585
Properties under capital lease	47,445	27,445
Total commercial real estate properties, at cost	16,681,602	14,069,141
Less: accumulated depreciation	(2,060,706)	(1,905,165)
Total commercial real estate properties, net	14,620,896	12,163,976
Assets held for sale	34,981	462,430
Cash and cash equivalents	255,399	281,409
Restricted cash	233,578	149,176
Investments in marketable securities	45,138	39,429
Tenant and other receivables, net of allowance of $17,618 and $18,068 in 2015 and 2014, respectively	63,491	57,369
Related party receivables	10,650	11,735
Deferred rents receivable, net of allowance of $21,730 and $27,411 in 2015 and 2014, respectively	498,776	374,944
Debt and preferred equity investments, net of discounts and deferred origination fees of $18,759 and $19,172 in 2015 and 2014, respectively	1,670,020	1,408,804
Investments in unconsolidated joint ventures	1,203,858	1,172,020
Deferred costs, net	370,435	327,962
Other assets	850,719	647,333
Total assets	19,857,941	17,096,587
Liabilities
Mortgages and other loans payable	6,992,504	5,586,709
Revolving credit facility	994,000	385,000
Term loan and senior unsecured notes	2,319,244	2,107,078
Accrued interest payable and other liabilities	210,883	137,634
Accounts payable and accrued expenses	196,213	173,246
Deferred revenue	399,102	187,148
Capital lease obligations	41,360	20,822
Deferred land leases payable	1,783	1,215
Dividend and distributions payable	79,790	64,393
Security deposits	68,023	66,614
Liabilities related to assets held for sale	29,000	266,873
Junior subordinated deferrable interest debentures held by trusts that issued trust preferred securities	100,000	100,000
Total liabilities	$ 11,431,902	$ 9,096,732
Commitments and contingencies
Preferred units	$ 282,516	$ 71,115
Equity
Accumulated other comprehensive loss	(8,749)	(6,980)
Noncontrolling interests in other partnerships		469,524
SL Green stockholders equity:
Limited partner interests in SLGOP (3,746 and 3,973 limited partner common units outstanding at December 31, 2015 and 2014, respectively)	424,206	469,524
SL Green partners' capital (1,035 and 1,013 general partner common units and 98,941 and 96,312 limited partner common units outstanding at December 31, 2015 2014, respectively)	7,074,282	6,722,422
Total SLGOP partners' capital	7,287,465	6,937,374
Noncontrolling interests in other partnerships	431,852	521,842
Total capital	7,719,317	7,459,216
Total liabilities and equity/capital	19,857,941	17,096,587
SL Green Operating Partnership | Series I Preferred Stock
SL Green stockholders equity:
Series I Preferred Units, $25.00 liquidation preference, 9,200 issued and outstanding at both December 31, 2015 and 2014	$ 221,932	$ 221,932