Consolidated Balance Sheets - USD ($) $ in Thousands		Jun. 30, 2021	Dec. 31, 2020
Commercial real estate properties, at cost:
Land and land interests		$ 1,403,399	$ 1,315,832
Building and improvements		4,088,659	4,168,193
Building leasehold and improvements		1,642,595	1,448,134
Right of use asset - financing leases		27,445	55,711
Right of use asset - operating leases		502,316	367,209
Total commercial real estate properties, at cost		7,664,414	7,355,079
Less: accumulated depreciation		(2,008,438)	(1,956,077)
Total commercial real estate properties, net		5,655,976	5,399,002
Cash and cash equivalents		218,337	266,059
Restricted cash		98,164	106,736
Investments in marketable securities		32,339	28,570
Tenant and other receivables		40,147	44,507
Related party receivables		36,430	34,657
Deferred rents receivable		304,140	302,791
Debt and preferred equity investments, net of discounts and deferred origination fees of $7,922 and $11,232 and allowances of $13,213 and $13,213 in 2021 and 2020, respectively		1,072,711	1,076,542
Investments in unconsolidated joint ventures		3,209,151	3,823,322
Deferred costs, net		161,962	177,168
Other assets		336,807	448,213
Total assets	[1]	11,166,164	11,707,567
Liabilities
Mortgages and other loans payable, net		1,857,829	1,979,972
Revolving credit facility, net		0	105,262
Unsecured term loans, net		1,496,062	1,495,275
Unsecured notes, net		1,248,930	1,248,219
Accrued interest payable		13,771	14,825
Other liabilities		193,321	302,798
Accounts payable and accrued expenses		126,929	151,309
Deferred revenue		114,536	118,572
Lease liability - financing leases		124,808	152,521
Lease liability - operating leases		443,313	339,458
Dividend and distributions payable		24,407	149,294
Security deposits		54,797	53,836
Junior subordinated deferrable interest debentures held by trusts that issued trust preferred securities		100,000	100,000
Total liabilities	[1]	5,798,703	6,211,341
Commitments and contingencies
Noncontrolling interests in Operating Partnership		355,201	358,262
Preferred units		198,503	202,169
Equity
Series I Preferred Stock, $0.01 par value, $25.00 liquidation preference, 9,200 issued and outstanding at both June 30, 2021 and December 31, 2020		221,932	221,932
Common stock, $0.01 par value, 160,000 shares authorized and 68,906 and 69,534 issued and outstanding at June 30, 2021 and December 31, 2020, respectively (including 1,026 and 1,026 shares held in treasury at June 30, 2021 and December 31, 2020, respectively)		690	716
Additional paid-in-capital		3,823,290	3,862,949
Treasury stock at cost		(124,049)	(124,049)
Accumulated other comprehensive loss		(66,863)	(67,247)
Retained earnings		934,132	1,015,462
Total SL Green stockholders' equity		4,789,132	4,909,763
Noncontrolling interests in other partnerships		24,625	26,032
Total equity		4,813,757	4,935,795
SL Green stockholders equity:
Total liabilities and equity/capital		11,166,164	11,707,567
SL Green Operating Partnership
Commercial real estate properties, at cost:
Land and land interests		1,403,399	1,315,832
Building and improvements		4,088,659	4,168,193
Building leasehold and improvements		1,642,595	1,448,134
Right of use asset - financing leases		27,445	55,711
Right of use asset - operating leases		502,316	367,209
Total commercial real estate properties, at cost		7,664,414	7,355,079
Less: accumulated depreciation		(2,008,438)	(1,956,077)
Total commercial real estate properties, net		5,655,976	5,399,002
Cash and cash equivalents		218,337	266,059
Restricted cash		98,164	106,736
Investments in marketable securities		32,339	28,570
Tenant and other receivables		40,147	44,507
Related party receivables		36,430	34,657
Deferred rents receivable		304,140	302,791
Debt and preferred equity investments, net of discounts and deferred origination fees of $7,922 and $11,232 and allowances of $13,213 and $13,213 in 2021 and 2020, respectively		1,072,711	1,076,542
Investments in unconsolidated joint ventures		3,209,151	3,823,322
Deferred costs, net		161,962	177,168
Other assets		336,807	448,213
Total assets	[2]	11,166,164	11,707,567
Liabilities
Mortgages and other loans payable, net		1,857,829	1,979,972
Revolving credit facility, net		0	105,262
Unsecured term loans, net		1,496,062	1,495,275
Unsecured notes, net		1,248,930	1,248,219
Accrued interest payable		13,771	14,825
Other liabilities		193,321	302,798
Accounts payable and accrued expenses		126,929	151,309
Deferred revenue		114,536	118,572
Lease liability - financing leases		124,808	152,521
Lease liability - operating leases		443,313	339,458
Dividend and distributions payable		24,407	149,294
Security deposits		54,797	53,836
Junior subordinated deferrable interest debentures held by trusts that issued trust preferred securities		100,000	100,000
Total liabilities	[2]	5,798,703	6,211,341
Commitments and contingencies
Limited partner interests in SLGOP (3,808 and 3,939 limited partner common units outstanding at June 30, 2021 and December 31, 2020, respectively)		355,201	358,262
Preferred units		198,503	202,169
Equity
Accumulated other comprehensive loss		(66,863)	(67,247)
SL Green stockholders equity:
Series I Preferred Units, $25.00 liquidation preference, 9,200 issued and outstanding at both June 30, 2021 and December 31, 2020		221,932	221,932
SL Green partners' capital (717 and 724 general partner common units and 67,163 and 67,784 limited partner common units outstanding at June 30, 2021 and December 31, 2020, respectively)		4,634,063	4,755,078
Total SLGOP partners' capital		4,789,132	4,909,763
Noncontrolling interests in other partnerships		24,625	26,032
Total capital		4,813,757	4,935,795
Total liabilities and equity/capital		11,166,164	11,707,567
Variable Interest Entity, Primary Beneficiary
Commercial real estate properties, at cost:
Land and land interests		179,600	41,200
Building and improvements		281,000	57,900
Building leasehold and improvements		2,000	2,000
Right of use asset - financing leases		53,200	37,800
Less: accumulated depreciation		(17,300)	(10,300)
Other assets		291,400	289,500
Liabilities
Mortgages and other loans payable, net		377,100	94,000
Accrued interest payable		1,100	700
Other liabilities		23,600	56,600
Lease liability - financing leases		$ 45,400	$ 29,900

[1] The Company's consolidated balance sheets include assets and liabilities of consolidated variable interest entities ("VIEs"). See Note 2. The consolidated balance sheets include the following amounts related to our consolidated VIEs, excluding the Operating Partnership: $179.6 million and $41.2 million of land, $281.0 million and $57.9 million of building and improvements, $2.0 million and $2.0 million of building and leasehold improvements, $53.2 million and $37.8 million of right of use assets, $17.3 million and $10.3 million of accumulated depreciation, $291.4 million and $289.5 million of other assets included in other line items, $377.1 million and $94.0 million of real estate debt, net, $1.1 million and $0.7 million of accrued interest payable, $45.4 million and $29.9 million of lease liabilities, and $23.6 million and $56.6 million of other liabilities included in other line items as of June 30, 2021 and December 31, 2020, respectively.

[2] The Operating Partnership's consolidated balance sheets include assets and liabilities of consolidated variable interest entities ("VIEs"). See Note 2. The consolidated balance sheets include the following amounts related to our consolidated VIEs, excluding the Operating Partnership: $179.6 million and $41.2 million of land, $281.0 million and $57.9 million of building and improvements, $2.0 million and $2.0 million of building and leasehold improvements, $53.2 million and $37.8 million of right of use assets, $17.3 million and $10.3 million of accumulated depreciation, $291.4 million and $289.5 million of other assets included in other line items, $377.1 million and $94.0 million of real estate debt, net, $1.1 million and $0.7 million of accrued interest payable, $45.4 million and $29.9 million of lease liabilities, and $23.6 million and $56.6 million of other liabilities included in other line items as of June 30, 2021 and December 31, 2020, respectively.