SL Green Operating Partnership 10-Q 9 May 22 2022 Q1 Quarterly report Financial data

Cover Page

Cover Page - shares	3 Months Ended
	Mar. 31, 2022	May 06, 2022
Document Information [Line Items]
Document Type	10-Q
Document Quarterly Report	true
Document Period End Date	Mar. 31, 2022
Document Transition Report	false
Entity File Number	1-13199
Entity Registrant Name	SL GREEN REALTY CORP
Entity Incorporation, State or Country Code	MD
Entity Tax Identification Number	13-3956775
Entity Address, Address Line One	One Vanderbilt Avenue
Entity Address, City or Town	New York
Entity Address, State or Province	NY
Entity Address, Postal Zip Code	10017
City Area Code	212
Local Phone Number	594-2700
Entity Current Reporting Status	Yes
Entity Interactive Data Current	Yes
Entity Filer Category	Large Accelerated Filer
Entity Small Business	false
Entity Emerging Growth Company	false
Entity Shell Company	false
Entity Common Stock, Shares Outstanding		64,124,349
Entity Central Index Key	0001040971
Current Fiscal Year End Date	--12-31
Document Fiscal Year Focus	2022
Document Fiscal Period Focus	Q1
Amendment Flag	false
Common Stock
Document Information [Line Items]
Trading Symbol	SLG
Title of 12(b) Security	Common Stock, $0.01 par value
Security Exchange Name	NYSE
Preferred Stock
Document Information [Line Items]
Trading Symbol	SLG.PRI
Title of 12(b) Security	6.500% Series I Cumulative Redeemable Preferred Stock, $0.01 par value
Security Exchange Name	NYSE
SL Green Operating Partnership
Document Information [Line Items]
Entity File Number	33-167793-02
Entity Registrant Name	SL GREEN OPERATING PARTNERSHIP, L.P.
Entity Incorporation, State or Country Code	DE
Entity Tax Identification Number	13-3960938
Entity Current Reporting Status	Yes
Entity Interactive Data Current	Yes
Entity Filer Category	Non-accelerated Filer
Entity Small Business	false
Entity Emerging Growth Company	false
Entity Shell Company	false
Entity Common Stock, Shares Outstanding		689,437
Entity Central Index Key	0001492869
Current Fiscal Year End Date	--12-31
Document Fiscal Year Focus	2022
Document Fiscal Period Focus	Q1
Amendment Flag	false

Consolidated Balance Sheets

Consolidated Balance Sheets - USD ($) $ in Thousands		Mar. 31, 2022	Dec. 31, 2021
Commercial real estate properties, at cost:
Land and land interests		$ 1,352,610	$ 1,350,701
Building and improvements		3,709,795	3,671,402
Building leasehold and improvements		1,654,571	1,645,081
Right of use asset - operating leases		983,723	983,723
Total commercial real estate properties, at cost		7,700,699	7,650,907
Less: accumulated depreciation		(1,938,804)	(1,896,199)
Total commercial real estate properties, net		5,761,895	5,754,708
Assets held for sale		49,757	140,855
Cash and cash equivalents		223,674	251,417
Restricted cash		83,644	85,567
Investments in marketable securities		32,889	34,752
Tenant and other receivables		41,257	47,616
Related party receivables		31,711	29,408
Deferred rents receivable		250,028	248,313
Debt and preferred equity investments, net of discounts and deferred origination fees of $3,670 and $5,057 and allowances of $6,630 and $6,630 in 2022 and 2021, respectively		1,107,870	1,088,723
Investments in unconsolidated joint ventures		3,000,986	2,997,934
Deferred costs, net		122,294	124,495
Other assets		308,960	262,841
Total assets	[1]	11,014,965	11,066,629
Liabilities
Mortgages and other loans payable, net		1,344,775	1,394,386
Revolving credit facility, net		491,998	381,334
Unsecured term loans, net		1,242,345	1,242,002
Unsecured notes, net		899,541	899,308
Accrued interest payable		21,545	12,698
Other liabilities		276,254	195,390
Accounts payable and accrued expenses		139,460	157,571
Deferred revenue		110,631	107,275
Lease liability - financing leases		103,238	102,914
Lease liability - operating leases		852,194	851,370
Dividend and distributions payable		23,628	187,372
Security deposits		54,179	52,309
Liabilities related to assets held for sale		64,041	64,120
Junior subordinated deferrable interest debentures held by trusts that issued trust preferred securities		100,000	100,000
Total liabilities	[1]	5,723,829	5,748,049
Commitments and contingencies
Noncontrolling interests in Operating Partnership		374,078	344,252
Preferred units		177,943	196,075
Equity
Series I Preferred Stock, $0.01 par value, $25.00 liquidation preference, 9,200 issued and outstanding at both March 31, 2022 and December 31, 2021		221,932	221,932
Common stock, $0.01 par value, 160,000 shares authorized and 65,184 and 65,132 issued and outstanding at March 31, 2022 and December 31, 2021, respectively (including 1,060 and 1,027 shares held in treasury at March 31, 2022 and December 31, 2021, respectively)		653	672
Additional paid-in-capital		3,792,689	3,739,409
Treasury stock at cost		(128,655)	(126,160)
Accumulated other comprehensive loss		(7,261)	(46,758)
Retained earnings		846,646	975,781
Total SL Green stockholders' equity		4,726,004	4,764,876
Noncontrolling interests in other partnerships		13,111	13,377
Total equity		4,739,115	4,778,253
Total liabilities and equity/capital		11,014,965	11,066,629
Service Corporation
Commercial real estate properties, at cost:
Land and land interests		179,600	193,400
Building and improvements		291,200	336,900
Building leasehold and improvements		0	0
Less: accumulated depreciation		(11,500)	(11,700)
Other assets		569,700	574,400
Liabilities
Mortgages and other loans payable, net		372,500	418,900
Other liabilities		226,400	145,200
Lease liability - financing leases		$ 15,300	$ 15,300
[1]	(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 $193.4 million of land, $291.2 million and $336.9 million of building and improvements, $— million and $— million of building and leasehold improvements, $15.4 million and $15.4 million of right of use assets, $11.5 million and $11.7 million of accumulated depreciation, $569.7 million and $574.4 million of other assets included in other line items, $372.5 million and $418.9 million of real estate debt, net, $0.8 million and $0.8 million of accrued interest payable, $15.3 million and $15.3 million of lease liabilities, and $226.4 million and $145.2 million of other liabilities included in other line items as of March 31, 2022 and December 31, 2021, respectively.

Consolidated Balance Sheets (Pa

Consolidated Balance Sheets (Parenthetical) - USD ($) $ in Thousands	Mar. 31, 2022	Dec. 31, 2021
Debt and preferred equity investments, discount and deferred origination fees	$ 3,670	$ 5,057
Allowance for loan and lease losses, real estate	$ 6,630	$ 6,630
Preferred stock, par value (in dollars per share)	$ 0.01
Common stock, par value (in dollars per share)	$ 0.01	$ 0.01
Common stock, shares authorized (in shares)	160,000,000	160,000,000
Common stock, shares outstanding (in shares)	65,184,000	65,132,000
Common stock, shares issued (in shares)	65,184,000	65,132,000
Treasury stock, shares (in shares)	1,060,000	1,027,000
Land and land interests	$ 1,352,610	$ 1,350,701
Building and improvements	3,709,795	3,671,402
Building leasehold and improvements	1,654,571	1,645,081
Accumulated depreciation	1,938,804	1,896,199
Other assets	308,960	262,841
Mortgages and other loans payable, net	1,344,775	1,394,386
Lease liability - financing leases	103,238	102,914
Other liabilities	276,254	195,390
Service Corporation
Land and land interests	179,600	193,400
Building and improvements	291,200	336,900
Building leasehold and improvements	0	0
Right of use asset - financing leases	15,400	15,400
Accumulated depreciation	11,500	11,700
Other assets	569,700	574,400
Mortgages and other loans payable, net	372,500	418,900
Accrued interest payable	800	800
Lease liability - financing leases	15,300	15,300
Other liabilities	$ 226,400	$ 145,200
Series I Preferred Stock
Preferred stock, par value (in dollars per share)	$ 0.01	$ 0.01
Preferred stock, liquidation preference (in dollars per share)	$ 25	$ 25
Preferred stock, shares outstanding (in shares)	9,200,000	9,200,000
Preferred stock, shares issued (in shares)	9,200,000	9,200,000

Consolidated Balance Sheets (_2

Consolidated Balance Sheets (Partnership) - USD ($) $ in Thousands		Mar. 31, 2022	Dec. 31, 2021
Commercial real estate properties, at cost:
Land and land interests		$ 1,352,610	$ 1,350,701
Building and improvements		3,709,795	3,671,402
Building leasehold and improvements		1,654,571	1,645,081
Right of use asset - operating leases		983,723	983,723
Total commercial real estate properties, at cost		7,700,699	7,650,907
Less: accumulated depreciation		(1,938,804)	(1,896,199)
Total commercial real estate properties, net		5,761,895	5,754,708
Assets held for sale		49,757	140,855
Cash and cash equivalents		223,674	251,417
Restricted cash		83,644	85,567
Investments in marketable securities		32,889	34,752
Tenant and other receivables		41,257	47,616
Related party receivables		31,711	29,408
Deferred rents receivable		250,028	248,313
Debt and preferred equity investments, net of discounts and deferred origination fees of $3,670 and $5,057 and allowances of $6,630 and $6,630 in 2022 and 2021, respectively		1,107,870	1,088,723
Investments in unconsolidated joint ventures		3,000,986	2,997,934
Deferred costs, net		122,294	124,495
Other assets		308,960	262,841
Total assets	[1]	11,014,965	11,066,629
Liabilities
Mortgages and other loans payable, net		1,344,775	1,394,386
Revolving credit facility, net		491,998	381,334
Unsecured term loans, net		1,242,345	1,242,002
Unsecured notes, net		899,541	899,308
Accrued interest payable		21,545	12,698
Other liabilities		276,254	195,390
Accounts payable and accrued expenses		139,460	157,571
Deferred revenue		110,631	107,275
Lease liability - financing leases		103,238	102,914
Lease liability - operating leases		852,194	851,370
Dividend and distributions payable		23,628	187,372
Security deposits		54,179	52,309
Liabilities related to assets held for sale		64,041	64,120
Junior subordinated deferrable interest debentures held by trusts that issued trust preferred securities		100,000	100,000
Total liabilities	[1]	5,723,829	5,748,049
Commitments and contingencies
Preferred units		177,943	196,075
SL Green stockholders equity:
Accumulated other comprehensive loss		(7,261)	(46,758)
Total liabilities and equity/capital		11,014,965	11,066,629
SL Green Operating Partnership
Commercial real estate properties, at cost:
Land and land interests		1,352,610	1,350,701
Building and improvements		3,709,795	3,671,402
Building leasehold and improvements		1,654,571	1,645,081
Right of use asset - operating leases		983,723	983,723
Total commercial real estate properties, at cost		7,700,699	7,650,907
Less: accumulated depreciation		(1,938,804)	(1,896,199)
Total commercial real estate properties, net		5,761,895	5,754,708
Assets held for sale		49,757	140,855
Cash and cash equivalents		223,674	251,417
Restricted cash		83,644	85,567
Investments in marketable securities		32,889	34,752
Tenant and other receivables		41,257	47,616
Related party receivables		31,711	29,408
Deferred rents receivable		250,028	248,313
Debt and preferred equity investments, net of discounts and deferred origination fees of $3,670 and $5,057 and allowances of $6,630 and $6,630 in 2022 and 2021, respectively		1,107,870	1,088,723
Investments in unconsolidated joint ventures		3,000,986	2,997,934
Deferred costs, net		122,294	124,495
Other assets		308,960	262,841
Total assets	[2]	11,014,965	11,066,629
Liabilities
Mortgages and other loans payable, net		1,344,775	1,394,386
Revolving credit facility, net		491,998	381,334
Unsecured term loans, net		1,242,345	1,242,002
Unsecured notes, net		899,541	899,308
Accrued interest payable		21,545	12,698
Other liabilities		276,254	195,390
Accounts payable and accrued expenses		139,460	157,571
Deferred revenue		110,631	107,275
Lease liability - financing leases		103,238	102,914
Lease liability - operating leases		852,194	851,370
Dividend and distributions payable		23,628	187,372
Security deposits		54,179	52,309
Liabilities related to assets held for sale		64,041	64,120
Junior subordinated deferrable interest debentures held by trusts that issued trust preferred securities		100,000	100,000
Total liabilities	[2]	5,723,829	5,748,049
Commitments and contingencies
Limited partner interests in SLGOP (3,782 and 3,939 limited partner common units outstanding at December 31, 2021 and 2020, respectively)		374,078	344,252
Preferred units		177,943	196,075
SL Green stockholders equity:
Series I Preferred Units, $25.00 liquidation preference, 9,200 issued and outstanding at both December 31, 2021 and 2020		221,932	221,932
SL Green partners' capital (677 and 703 general partner common units, and 63,428 and 65,771 limited partner common units outstanding at December 31, 2021 and 2020, respectively)		4,511,333	4,589,702
Accumulated other comprehensive loss		(7,261)	(46,758)
Total SLGOP partners' capital		4,726,004	4,764,876
Noncontrolling interests in other partnerships		13,111	13,377
Total capital		4,739,115	4,778,253
Total liabilities and equity/capital		$ 11,014,965	$ 11,066,629
[1]	(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 $193.4 million of land, $291.2 million and $336.9 million of building and improvements, $— million and $— million of building and leasehold improvements, $15.4 million and $15.4 million of right of use assets, $11.5 million and $11.7 million of accumulated depreciation, $569.7 million and $574.4 million of other assets included in other line items, $372.5 million and $418.9 million of real estate debt, net, $0.8 million and $0.8 million of accrued interest payable, $15.3 million and $15.3 million of lease liabilities, and $226.4 million and $145.2 million of other liabilities included in other line items as of March 31, 2022 and December 31, 2021, respectively.
[2]	(1) 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 $193.4 million of land, $291.2 million and $336.9 million of building and improvements, $— million and $— million of building and leasehold improvements, $15.4 million and $15.4 million of right of use assets, $11.5 million and $11.7 million of accumulated depreciation, $569.7 million and $574.4 million of other assets included in other line items, $372.5 million and $418.9 million of real estate debt, net, $0.8 million and $0.8 million of accrued interest payable, $15.3 million and $15.3 million of lease liabilities, and $226.4 million and $145.2 million of other liabilities included in other line items as of March 31, 2022 and December 31, 2021, respectively.

Consolidated Balance Sheets (_3

Consolidated Balance Sheets (Partnership) (Parenthetical) - USD ($) shares in Thousands, $ in Thousands	Mar. 31, 2022	Dec. 31, 2021
Debt and preferred equity investments, discount and deferred origination fees	$ 3,670	$ 5,057
Allowance for loan and lease losses, real estate	6,630	6,630
Building and improvements	3,709,795	3,671,402
Building leasehold and improvements	1,654,571	1,645,081
Accumulated depreciation	1,938,804	1,896,199
Other assets	308,960	262,841
Mortgages and other loans payable, net	1,344,775	1,394,386
Lease liability - financing leases	103,238	102,914
Other liabilities	276,254	195,390
Land and land interests	1,352,610	1,350,701
SL Green Operating Partnership
Debt and preferred equity investments, discount and deferred origination fees	3,670	5,057
Allowance for loan and lease losses, real estate	$ 6,630	$ 6,630
Limited partner interests in Operating Partnership, limited partner common units outstanding (shares)	4,095	3,782
SL Green partner's capital, general partner common units outstanding (shares)	682	677
SL Green partners' capital, limited partner common units outstanding (shares)	63,442	63,428
Building and improvements	$ 3,709,795	$ 3,671,402
Building leasehold and improvements	1,654,571	1,645,081
Accumulated depreciation	1,938,804	1,896,199
Other assets	308,960	262,841
Mortgages and other loans payable, net	1,344,775	1,394,386
Lease liability - financing leases	103,238	102,914
Other liabilities	276,254	195,390
Land and land interests	1,352,610	1,350,701
Service Corporation
Building and improvements	291,200	336,900
Building leasehold and improvements	0	0
Right of use asset - financing leases	15,400	15,400
Accumulated depreciation	11,500	11,700
Other assets	569,700	574,400
Mortgages and other loans payable, net	372,500	418,900
Accrued interest payable	800	800
Lease liability - financing leases	15,300	15,300
Other liabilities	226,400	145,200
Land and land interests	$ 179,600	$ 193,400
Series I Preferred Stock | SL Green Operating Partnership
Preferred units, liquidation preference (in dollars per share)	$ 25	$ 25
Preferred units, shares issued (in shares)	9,200	9,200
Preferred units, shares outstanding (in shares)	9,200	9,200

Consolidated Statements of Oper

Consolidated Statements of Operations - USD ($) shares in Thousands, $ in Thousands	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021
Revenues
Rental revenue, net	$ 156,031	$ 188,089
Investment income	19,888	19,273
Other income	12,045	18,740
Total revenues	187,964	226,102
Expenses
Operating expenses, including related party expenses of $2,523 in 2022 and $2,225 in 2021	42,583	42,284
Real estate taxes	30,747	45,411
Operating lease rent	6,564	6,739
Interest expense, net of interest income	15,070	23,388
Amortization of deferred financing costs	1,948	3,774
Depreciation and amortization	46,983	62,996
Transaction related costs	28	22
Marketing, general and administrative	24,776	22,885
Total expenses	168,699	207,499
Equity in net loss from unconsolidated joint ventures	(4,715)	(2,864)
Equity in net gain (loss) on sale of interest in unconsolidated joint venture/real estate	0	(12,629)
Purchase price and other fair value adjustment	(63)	2,664
Loss on sale of real estate, net	(1,002)	(1,388)
Depreciable real estate reserves and impairment	0	(8,241)
Net income (loss)	13,485	(3,855)
Net income attributable to noncontrolling interests:
Noncontrolling interests in the Operating Partnership	(492)	476
Noncontrolling interests in other partnerships	143	1,499
Preferred unit distributions	(1,647)	(1,846)
Net income (loss) attributable to SL Green/SLGOP	11,489	(3,726)
Perpetual preferred stock dividends	(3,738)	(3,738)
Net income (loss) attributable to SL Green common stockholders	$ 7,751	$ (7,464)
Basic earnings (loss) per share (in dollars per share)	$ 0.12	$ (0.12)
Diluted earnings (loss) per share (in dollars per share)	$ 0.11	$ (0.12)
Basic weighted average common shares outstanding (in shares)	64,349	66,961
Diluted weighted average common shares and common share equivalents outstanding (in shares)	70,228	72,004

Consolidated Statements of Op_2

Consolidated Statements of Operations (Parenthetical) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021
Income Statement [Abstract]
Related party expenses	$ 2,523	$ 2,225

Consolidated Statements of Op_3

Consolidated Statements of Operations (Partnership) - USD ($) shares in Thousands, $ in Thousands	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021
Revenues
Rental revenue, net	$ 156,031	$ 188,089
Investment income	19,888	19,273
Other income	12,045	18,740
Total revenues	187,964	226,102
Expenses
Operating expenses, including related party expenses of $2,523 in 2022 and $2,225 in 2021	42,583	42,284
Real estate taxes	30,747	45,411
Operating lease rent	6,564	6,739
Interest expense, net of interest income	15,070	23,388
Amortization of deferred financing costs	1,948	3,774
Depreciation and amortization	46,983	62,996
Transaction related costs	28	22
Marketing, general and administrative	24,776	22,885
Total expenses	168,699	207,499
Equity in net loss from unconsolidated joint ventures	(4,715)	(2,864)
Equity in net gain (loss) on sale of interest in unconsolidated joint venture/real estate	0	(12,629)
Purchase price and other fair value adjustment	(63)	2,664
Loss on sale of real estate, net	(1,002)	(1,388)
Depreciable real estate reserves and impairment	0	(8,241)
Net income (loss)	13,485	(3,855)
Net income attributable to noncontrolling interests:
Net loss attributable to noncontrolling interests and preferred units distributions	(1,996)	129
Preferred unit distributions	(1,647)	(1,846)
Net income (loss) attributable to SL Green/SLGOP	11,489	(3,726)
Perpetual preferred stock dividends	(3,738)	(3,738)
SL Green Operating Partnership
Revenues
Rental revenue, net	156,031	188,089
Investment income	19,888	19,273
Other income	12,045	18,740
Total revenues	187,964	226,102
Expenses
Operating expenses, including related party expenses of $2,523 in 2022 and $2,225 in 2021	42,583	42,284
Real estate taxes	30,747	45,411
Operating lease rent	6,564	6,739
Interest expense, net of interest income	15,070	23,388
Amortization of deferred financing costs	1,948	3,774
Depreciation and amortization	46,983	62,996
Transaction related costs	28	22
Marketing, general and administrative	24,776	22,885
Total expenses	168,699	207,499
Equity in net loss from unconsolidated joint ventures	(4,715)	(2,864)
Equity in net gain (loss) on sale of interest in unconsolidated joint venture/real estate	0	(12,629)
Purchase price and other fair value adjustment	(63)	2,664
Loss on sale of real estate, net	(1,002)	(1,388)
Depreciable real estate reserves and impairment	0	(8,241)
Net income (loss)	13,485	(3,855)
Net income attributable to noncontrolling interests:
Net loss attributable to noncontrolling interests and preferred units distributions	143	1,499
Preferred unit distributions	(1,647)	(1,846)
Net income (loss) attributable to SL Green/SLGOP	11,981	(4,202)
Perpetual preferred stock dividends	(3,738)	(3,738)
Net income (loss) attributable to SLGOP common unitholders	$ 8,243	$ (7,940)
Basic earnings (loss) per unit (in dollars per share)	$ 0.12	$ (0.12)
Diluted earnings (loss) per unit (in dollars per share)	$ 0.11	$ (0.12)
Basic weighted average common units outstanding (in shares)	68,470	71,109
Diluted weighted average common units and common unit equivalents outstanding (in shares)	70,228	72,004

Consolidated Statements of Op_4

Consolidated Statements of Operations (Partnership) (Parenthetical) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021
Related party expenses	$ 2,523	$ 2,225
SL Green Operating Partnership
Related party expenses	$ 2,523	$ 2,225

Consolidated Statements of Comp

Consolidated Statements of Comprehensive Income - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021
Statement of Comprehensive Income [Abstract]
Net income	$ 13,485	$ (3,855)
Other comprehensive loss:
Increase in unrealized value of derivative instruments, including SL Green's share of joint venture derivative instruments	43,567	51,263
Decrease in unrealized value of marketable securities	(1,793)	(258)
Other comprehensive income	41,774	51,005
Comprehensive income	55,259	47,150
Net (income) loss attributable to noncontrolling interests and preferred units distributions	(1,996)	129
Other comprehensive income attributable to noncontrolling interests	(2,277)	(2,655)
Comprehensive income attributable to SL Green/SLGOP	$ 50,986	$ 44,624

Consolidated Statements of Co_2

Consolidated Statements of Comprehensive Income (Partnership) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021
Net income (loss)	$ 13,485	$ (3,855)
Other comprehensive loss:
Increase in unrealized value of derivative instruments, including SLGOP's share of joint venture derivative instruments	43,567	51,263
Decrease in unrealized value of marketable securities	(1,793)	(258)
Other comprehensive income	41,774	51,005
Comprehensive income	55,259	47,150
Net loss attributable to noncontrolling interests and preferred units distributions	(1,996)	129
Other comprehensive income attributable to noncontrolling interests	(2,277)	(2,655)
Comprehensive income attributable to SL Green/SLGOP	50,986	44,624
SL Green Operating Partnership
Net income (loss)	13,485	(3,855)
Other comprehensive loss:
Increase in unrealized value of derivative instruments, including SLGOP's share of joint venture derivative instruments	43,567	51,263
Decrease in unrealized value of marketable securities	(1,793)	(258)
Other comprehensive income	41,774	51,005
Comprehensive income	55,259	47,150
Net loss attributable to noncontrolling interests and preferred units distributions	143	1,499
Other comprehensive income attributable to noncontrolling interests	(2,277)	(2,655)
Comprehensive income attributable to SL Green/SLGOP	$ 53,125	$ 45,994

Consolidated Statement of Equit

Consolidated Statement of Equity - USD ($) shares in Thousands, $ in Thousands	Total	Common Stock	Additional Paid- In-Capital	Treasury Stock	Accumulated Other Comprehensive Income (Loss)	Retained Earnings	Noncontrolling Interests	Series I Preferred StockPreferred Stock
Beginning Balance at Dec. 31, 2020	$ 4,935,795	$ 716	$ 3,862,949	$ (124,049)	$ (67,247)	$ 1,015,462	$ 26,032	$ 221,932
Beginning Balance (in shares) at Dec. 31, 2020		66,474
Increase (Decrease) in Stockholders' Equity
Net income	(5,225)					(3,726)	(1,499)
Other comprehensive income (loss)	48,350				48,350
Preferred dividends	(3,738)					(3,738)
DRSPP proceeds (in shares)		5
DRSPP proceeds	351		351
Reallocation of noncontrolling interest in the Operating Partnership	(26,609)					(26,609)
Deferred compensation plan and stock awards, net of forfeitures and tax withholdings (in shares)		110
Deferred compensation plan and stock awards, net of forfeitures and tax withholdings	6,728	$ 2	6,726
Repurchases of common stock (in shares)		(1,267)
Repurchases of common stock	(80,310)	$ (13)	(80,297)
Contribution to consolidated joint venture interests	171						171
Cash distributions to noncontrolling interests	(110)						(110)
Issuance of special dividend paid primarily in stock (in shares)		1,974
Issuance of special dividend paid primarily in stock	123,529		123,529
Cash distributions declared	(63,312)					(63,312)
Ending Balance at Mar. 31, 2021	4,935,620	$ 705	3,913,258	(124,049)	(18,897)	918,077	24,594	221,932
Ending Balance (in shares) at Mar. 31, 2021		67,296
Beginning Balance at Dec. 31, 2021	4,778,253	$ 672	3,739,409	(126,160)	(46,758)	975,781	13,377	221,932
Beginning Balance (in shares) at Dec. 31, 2021		64,105
Increase (Decrease) in Stockholders' Equity
Net income	11,346					11,489	(143)
Other comprehensive income (loss)	39,497				39,497
Preferred dividends	(3,738)					(3,738)
DRSPP proceeds (in shares)		1
DRSPP proceeds	89		89
Reallocation of noncontrolling interest in the Operating Partnership	(43,023)					(43,023)
Deferred compensation plan and stock awards, net of forfeitures and tax withholdings (in shares)		28
Deferred compensation plan and stock awards, net of forfeitures and tax withholdings	5,056	$ 1	5,055
Repurchases of common stock (in shares)		(1,971)
Repurchases of common stock	(151,197)	$ (20)	(114,979)			(36,198)
Cash distributions to noncontrolling interests	(123)						(123)
Issuance of special dividend paid primarily in stock (in shares)		1,961
Issuance of special dividend paid primarily in stock	160,620		163,115	(2,495)
Cash distributions declared	(57,665)					(57,665)
Ending Balance at Mar. 31, 2022	$ 4,739,115	$ 653	$ 3,792,689	$ (128,655)	$ (7,261)	$ 846,646	$ 13,111	$ 221,932
Ending Balance (in shares) at Mar. 31, 2022		64,124

Consolidated Statement of Equ_2

Consolidated Statement of Equity (Parenthetical) - $ / shares	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021
Statement of Stockholders' Equity [Abstract]
Cash distribution declared, per common share (in dollars per share)	$ 0.932	$ 0.938

Consolidated Statement of Capit

Consolidated Statement of Capital - USD ($) shares in Thousands, $ in Thousands	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021
Increase (Decrease) in Partner's Capital
DRSPP proceeds	$ 89	$ 351
Reallocation of noncontrolling interest in the Operating Partnership	(43,023)	(26,609)
Deferred compensation plan and stock awards, net of forfeitures and tax withholdings	5,056	6,728
Repurchases of common units	(151,197)	(80,310)
Contribution to consolidated joint venture interests		171
Cash distributions to noncontrolling interests	$ (123)	$ (110)
Common Stock
Increase (Decrease) in Partner's Capital
DRSPP proceeds (in shares)	1	5
Deferred compensation plan and stock awards, net of forfeitures and tax withholdings (in shares)	28	110
Deferred compensation plan and stock awards, net of forfeitures and tax withholdings	$ 1	$ 2
Repurchases of common units (in units)	(1,971)	(1,267)
Repurchases of common units	$ (20)	$ (13)
Noncontrolling Interests
Increase (Decrease) in Partner's Capital
Contribution to consolidated joint venture interests		171
Cash distributions to noncontrolling interests	(123)	(110)
Additional Paid- In-Capital
Increase (Decrease) in Partner's Capital
DRSPP proceeds	89	351
Deferred compensation plan and stock awards, net of forfeitures and tax withholdings	5,055	6,726
Repurchases of common units	(114,979)	(80,297)
SL Green Operating Partnership
Increase (Decrease) in Partner's Capital
Beginning Balance	4,778,253	4,935,795
Net income	11,346	(5,225)
Other comprehensive income	39,497	48,350
Preferred distributions	(3,738)	(3,738)
DRSPP proceeds	89	351
Reallocation of noncontrolling interest in the Operating Partnership	(43,023)	(26,609)
Deferred compensation plan and stock awards, net of forfeitures and tax withholdings	5,056	6,728
Repurchases of common units	(151,197)	(80,310)
Contribution to consolidated joint venture interests		171
Cash distributions to noncontrolling interests	(123)	(110)
Issuance of special distribution paid primarily in units	160,620	123,529
Cash distributions declared ($0.932 per common unit, none of which represented a return of capital for federal income tax purposes)	(57,665)	(63,312)
Ending Balance	4,739,115	4,935,620
SL Green Operating Partnership | Preferred Units | Series I Preferred Stock
Increase (Decrease) in Partner's Capital
Beginning Balance	221,932	221,932
Ending Balance	221,932	221,932
SL Green Operating Partnership | Common Stock | Partners' Interest
Increase (Decrease) in Partner's Capital
Beginning Balance	$ 4,589,702	$ 4,755,078
Beginning Balance (units)	64,105	66,474
Net income	$ 11,489	$ (3,726)
Preferred distributions	$ (3,738)	$ (3,738)
DRSPP proceeds (in shares)	1	5
DRSPP proceeds	$ 89	$ 351
Reallocation of noncontrolling interest in the Operating Partnership	$ (43,023)	$ (26,609)
Deferred compensation plan and stock awards, net of forfeitures and tax withholdings (in shares)	28	110
Deferred compensation plan and stock awards, net of forfeitures and tax withholdings	$ 5,056	$ 6,728
Repurchases of common units (in units)	(1,971)	(1,267)
Repurchases of common units	$ (151,197)	$ (80,310)
Issuance of special distribution paid primarily in units (in shares)	1,961	1,974
Issuance of special distribution paid primarily in units	$ 160,620	$ 123,529
Cash distributions declared ($0.932 per common unit, none of which represented a return of capital for federal income tax purposes)	(57,665)	(63,312)
Ending Balance	$ 4,511,333	$ 4,707,991
Ending Balance (units)	64,124	67,296
SL Green Operating Partnership | Accumulated Other Comprehensive Loss
Increase (Decrease) in Partner's Capital
Beginning Balance	$ (46,758)	$ (67,247)
Other comprehensive income	39,497	48,350
Ending Balance	(7,261)	(18,897)
SL Green Operating Partnership | Noncontrolling Interests
Increase (Decrease) in Partner's Capital
Beginning Balance	13,377	26,032
Net income	(143)	(1,499)
Contribution to consolidated joint venture interests		171
Cash distributions to noncontrolling interests	(123)	(110)
Ending Balance	$ 13,111	$ 24,594

Consolidated Statement of Cap_2

Consolidated Statement of Capital (Parenthetical) - $ / shares	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021
Cash distribution declared, per common share (in dollars per share)	$ 0.932	$ 0.938
SL Green Operating Partnership
Cash distribution declared, per common share (in dollars per share)	$ 0.932	$ 0.938

Consolidated Statements of Cash

Consolidated Statements of Cash Flows - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021
Operating Activities
Net income (loss)	$ 13,485	$ (3,855)
Adjustments to reconcile net income (loss) to net cash provided by operating activities:
Depreciation and amortization	48,931	66,770
Equity in net loss from unconsolidated joint ventures	4,715	2,864
Distributions of cumulative earnings from unconsolidated joint ventures	188	69
Equity in net loss on sale of interest in unconsolidated joint venture interest/real estate	0	12,629
Purchase price and other fair value adjustments	63	(2,664)
Depreciable real estate reserves and impairment	0	8,241
Loss on sale of real estate, net	1,002	1,388
Deferred rents receivable	(546)	(2,685)
Non-cash lease expense	6,043	3,375
Other non-cash adjustments	(6,964)	15,564
Changes in operating assets and liabilities:
Tenant and other receivables	13,673	(4,138)
Related party receivables	(2,335)	(683)
Deferred lease costs	(4,240)	(240)
Other assets	(25,076)	(24,354)
Accounts payable, accrued expenses, other liabilities and security deposits	28,049	(38,640)
Deferred revenue	3,550	4,121
Lease liability - operating leases	864	(19,160)
Net cash provided by operating activities	81,402	18,602
Investing Activities
Additions to land, buildings and improvements	(61,680)	(49,328)
Acquisition deposits and deferred purchase price	(15,000)	0
Investments in unconsolidated joint ventures	(11,399)	(21,027)
Distributions in excess of cumulative earnings from unconsolidated joint ventures	16,089	19,692
Net proceeds from disposition of real estate/joint venture interest	91,994	62,800
Cash assumed from consolidation of real estate investment	0	9,475
Proceeds from sale or redemption of marketable securities	0	4,528
Other investments	209	(54)
Origination of debt and preferred equity investments	(13,122)	(5,905)
Repayments or redemption of debt and preferred equity investments	6,405	0
Net cash provided by investing activities	13,496	20,181
Financing Activities
Proceeds from mortgages and other loans payable	5,309	10,391
Repayments of mortgages and other loans payable	(55,715)	(362,542)
Proceeds from revolving credit facility and unsecured notes	320,000	530,000
Repayments of revolving credit facility and unsecured notes	(210,000)	(10,000)
Proceeds from stock options exercised and DRSPP issuance	89	351
Repurchase of common stock	(151,197)	(84,089)
Redemption of preferred stock	(17,967)	(3,631)
Redemption of OP units	(18,272)	(13,261)
Distributions to noncontrolling interests in other partnerships	(123)	(110)
Contributions from noncontrolling interests in other partnerships	0	171
Distributions to noncontrolling interests in the Operating Partnership	(4,415)	(4,148)
Dividends paid on common and preferred stock	(66,339)	(69,772)
Other obligations related to secured borrowing	77,874	0
Tax withholdings related to restricted share awards	(3,888)	(2,788)
Deferred loan costs	80	(288)
Principal payments of on financing lease liabilities	0	(255)
Net cash used in financing activities	(124,564)	(9,971)
Net (decrease) increase in cash, cash equivalents, and restricted cash	(29,666)	28,812
Cash, cash equivalents, and restricted cash at beginning of year	336,984	372,795
Cash, cash equivalents, and restricted cash at end of period	307,318	401,607
Supplemental Disclosure of Non-Cash Investing and Financing Activities:
Issuance of special dividend paid primarily in stock	160,620	123,529
Tenant improvements and capital expenditures payable	8,700	15,214
Fair value adjustment to noncontrolling interest in the Operating Partnership	43,023	26,609
Consolidation of real estate investment	0	119,444
Extinguishment of debt in connection with property dispositions	0	53,548
Debt and preferred equity investments	0	10,000
Removal of fully depreciated commercial real estate properties	651	1,120
Share repurchase payable	0	3,779
Recognition of right of use assets and related lease liabilities	0	119,711
Cash and cash equivalents	223,674	304,999
Restricted cash	83,644	96,608
Total cash, cash equivalents, and restricted cash	$ 307,318	$ 401,607

Consolidated Statements of Ca_2

Consolidated Statements of Cash Flows (Partnership) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021
Operating Activities
Net income (loss)	$ 13,485	$ (3,855)
Adjustments to reconcile net income (loss) to net cash provided by operating activities:
Depreciation and amortization	48,931	66,770
Equity in net loss from unconsolidated joint ventures	4,715	2,864
Distributions of cumulative earnings from unconsolidated joint ventures	188	69
Equity in net loss on sale of interest in unconsolidated joint venture interest/real estate	0	12,629
Purchase price and other fair value adjustments	63	(2,664)
Depreciable real estate reserves and impairment	0	8,241
Loss on sale of real estate, net	1,002	1,388
Deferred rents receivable	(546)	(2,685)
Non-cash lease expense	6,043	3,375
Other non-cash adjustments	(6,964)	15,564
Changes in operating assets and liabilities:
Tenant and other receivables	13,673	(4,138)
Related party receivables	(2,335)	(683)
Deferred lease costs	(4,240)	(240)
Other assets	(25,076)	(24,354)
Accounts payable, accrued expenses, other liabilities and security deposits	28,049	(38,640)
Deferred revenue	3,550	4,121
Lease liability - operating leases	864	(19,160)
Net cash provided by operating activities	81,402	18,602
Investing Activities
Additions to land, buildings and improvements	(61,680)	(49,328)
Acquisition deposits and deferred purchase price	(15,000)	0
Investments in unconsolidated joint ventures	(11,399)	(21,027)
Distributions in excess of cumulative earnings from unconsolidated joint ventures	16,089	19,692
Net proceeds from disposition of real estate/joint venture interest	91,994	62,800
Cash assumed from consolidation of real estate investment	0	9,475
Proceeds from sale or redemption of marketable securities	0	4,528
Other investments	209	(54)
Origination of debt and preferred equity investments	(13,122)	(5,905)
Repayments or redemption of debt and preferred equity investments	6,405	0
Net cash provided by investing activities	13,496	20,181
Financing Activities
Proceeds from mortgages and other loans payable	5,309	10,391
Repayments of mortgages and other loans payable	(55,715)	(362,542)
Proceeds from revolving credit facility and unsecured notes	320,000	530,000
Repayments of revolving credit facility and unsecured notes	(210,000)	(10,000)
Proceeds from stock options exercised and DRSPP issuance	89	351
Repurchase of common units	(151,197)	(84,089)
Redemption of preferred units	(17,967)	(3,631)
Redemption of OP units	(18,272)	(13,261)
Distributions to noncontrolling interests in other partnerships	(123)	(110)
Contributions from noncontrolling interests in other partnerships	0	171
Distributions paid on common and preferred units	(66,339)	(69,772)
Other obligations related to secured borrowing	77,874	0
Tax withholdings related to restricted share awards	(3,888)	(2,788)
Deferred loan costs	80	(288)
Principal payments of on financing lease liabilities	0	(255)
Net cash used in financing activities	(124,564)	(9,971)
Net (decrease) increase in cash, cash equivalents, and restricted cash	(29,666)	28,812
Cash, cash equivalents, and restricted cash at beginning of year	336,984	372,795
Cash, cash equivalents, and restricted cash at end of period	307,318	401,607
Supplemental Disclosure of Non-Cash Investing and Financing Activities:
Issuance of special distribution paid primarily in units	160,620	123,529
Tenant improvements and capital expenditures payable	8,700	15,214
Fair value adjustment to noncontrolling interest in the Operating Partnership	43,023	26,609
Consolidation of real estate investment	0	119,444
Extinguishment of debt in connection with property dispositions	0	53,548
Debt and preferred equity investments	0	10,000
Removal of fully depreciated commercial real estate properties	651	1,120
Share repurchase payable	0	3,779
Recognition of right of use assets and related lease liabilities	0	119,711
Cash and cash equivalents	223,674	304,999
Restricted cash	83,644	96,608
Total cash, cash equivalents, and restricted cash	307,318	401,607
SL Green Operating Partnership
Operating Activities
Net income (loss)	13,485	(3,855)
Adjustments to reconcile net income (loss) to net cash provided by operating activities:
Depreciation and amortization	48,931	66,770
Equity in net loss from unconsolidated joint ventures	4,715	2,864
Distributions of cumulative earnings from unconsolidated joint ventures	188	69
Equity in net loss on sale of interest in unconsolidated joint venture interest/real estate	0	12,629
Purchase price and other fair value adjustments	63	(2,664)
Depreciable real estate reserves and impairment	0	8,241
Loss on sale of real estate, net	1,002	1,388
Deferred rents receivable	(546)	(2,685)
Non-cash lease expense	6,043	3,375
Other non-cash adjustments	(6,964)	15,564
Changes in operating assets and liabilities:
Tenant and other receivables	13,673	(4,138)
Related party receivables	(2,335)	(683)
Deferred lease costs	(4,240)	(240)
Other assets	(25,076)	(24,354)
Accounts payable, accrued expenses, other liabilities and security deposits	28,049	(38,640)
Deferred revenue	3,550	4,121
Lease liability - operating leases	864	(19,160)
Net cash provided by operating activities	81,402	18,602
Investing Activities
Additions to land, buildings and improvements	(61,680)	(49,328)
Acquisition deposits and deferred purchase price	(15,000)	0
Investments in unconsolidated joint ventures	(11,399)	(21,027)
Distributions in excess of cumulative earnings from unconsolidated joint ventures	16,089	19,692
Net proceeds from disposition of real estate/joint venture interest	91,994	62,800
Cash assumed from consolidation of real estate investment	0	9,475
Proceeds from sale or redemption of marketable securities	0	4,528
Other investments	209	(54)
Origination of debt and preferred equity investments	(13,122)	(5,905)
Repayments or redemption of debt and preferred equity investments	6,405	0
Net cash provided by investing activities	13,496	20,181
Financing Activities
Proceeds from mortgages and other loans payable	5,309	10,391
Repayments of mortgages and other loans payable	(55,715)	(362,542)
Proceeds from revolving credit facility and unsecured notes	320,000	530,000
Repayments of revolving credit facility and unsecured notes	(210,000)	(10,000)
Proceeds from stock options exercised and DRSPP issuance	89	351
Repurchase of common units	(151,197)	(84,089)
Redemption of preferred units	(17,967)	(3,631)
Redemption of OP units	(18,272)	(13,261)
Distributions to noncontrolling interests in other partnerships	(123)	(110)
Contributions from noncontrolling interests in other partnerships	0	171
Distributions paid on common and preferred units	(70,754)	(73,920)
Other obligations related to secured borrowing	77,874	0
Tax withholdings related to restricted share awards	(3,888)	(2,788)
Deferred loan costs	80	(288)
Principal payments of on financing lease liabilities	0	(255)
Net cash used in financing activities	(124,564)	(9,971)
Net (decrease) increase in cash, cash equivalents, and restricted cash	(29,666)	28,812
Cash, cash equivalents, and restricted cash at beginning of year	336,984	372,795
Cash, cash equivalents, and restricted cash at end of period	307,318	401,607
Supplemental Disclosure of Non-Cash Investing and Financing Activities:
Issuance of special distribution paid primarily in units	160,620	123,529
Tenant improvements and capital expenditures payable	8,700	15,214
Fair value adjustment to noncontrolling interest in the Operating Partnership	43,023	26,609
Consolidation of real estate investment	0	119,444
Extinguishment of debt in connection with property dispositions	0	53,548
Debt and preferred equity investments	0	10,000
Removal of fully depreciated commercial real estate properties	651	1,120
Share repurchase payable	0	3,779
Recognition of right of use assets and related lease liabilities	0	119,711
Cash and cash equivalents	223,674	304,999
Restricted cash	83,644	96,608
Total cash, cash equivalents, and restricted cash	$ 307,318	$ 401,607

Organization and Basis of Prese

Organization and Basis of Presentation	3 Months Ended
	Mar. 31, 2022
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 S.L. Green Management Corp, or the Service Corporation. All of the management, leasing and construction services that are provided to the properties that are wholly-owned by us and that are provided to certain joint ventures are conducted through SL Green Management LLC and S.L. Green Management Corp., respectively, which are 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 all of our operations are conducted through, the Operating Partnership. The Company is the sole managing general partner of the Operating Partnership. As of March 31, 2022, noncontrolling investors held, in the aggregate, a 6.00% limited partnership interest in the Operating Partnership. We refer to these interests as the noncontrolling interests in the Operating Partnership. The Operating Partnership is considered a variable interest entity, or VIE, in which we are the primary beneficiary. See Note 11, "Noncontrolling Interests on the Company's Consolidated Financial Statements." On December 2, 2021, our Board of Directors declared an ordinary dividend of $0.3108 per share and a special dividend of $2.4392 per share (together, "the Total Dividend"). The Total Dividend was paid on January 18, 2022 to shareholders of record at the close of business on December 15, 2021 ("the Record Date"). Shareholders had the opportunity to elect to receive the Total Dividend in the form of all cash or all stock, subject to proration if either option was oversubscribed. As a result of the elections made, the cash option was oversubscribed and was prorated. Shareholders who elected to receive cash received, for each share of common stock they owned as of the Record Date, approximately $0.3976 in cash and 0.0295 shares of common stock. Shareholders who elected to receive shares received, for each share of common stock they owned as of the Record Date, approximately 0.0345 shares of common stock. The number of shares issued was calculated based on the volume weighted average trading price of SLG's common stock between January 5-7, 2022 of $79.71 per share. To mitigate the dilutive impact of the common stock issued in the special dividend, the Board of Directors also authorized a reverse stock split, which was effective after markets closed on January 21, 2022. On January 10, 2022, a committee of the Board of Directors calculated the ratio for the reverse stock split of our issued and outstanding shares of common stock as 1.03060-for-1. After the issuance of the dividend and the completion of the reverse stock split, the number of shares of our common stock outstanding was equivalent to the number of total shares outstanding on the Record Date (not including any issuances or repurchases that occurred following the Record Date, as well as any fractional shares that would have been issued but for which cash-in-lieu was paid). However, on a relative basis, some individual shareholders may have more shares of SLG’s common stock, and some individual shareholders may have fewer shares of our common stock, depending on their individual elections to receive cash or stock and as a result of the cash option being oversubscribed. All share-related references and measurements including the number of shares outstanding, share prices, number of shares repurchased, earnings per share, dividends per share, and share-based compensation awards, have been retroactively adjusted to reflect the reverse stock split for all periods presented in this Quarterly Report on Form 10-Q. As of March 31, 2022, we owned the following interests in properties in the New York metropolitan area, primarily in midtown Manhattan. Our investments located outside of Manhattan are referred to as the Suburban properties: Consolidated Unconsolidated Total Location Property Number of Buildings Approximate Square Feet (unaudited) Number of Buildings Approximate Square Feet (unaudited) Number of Buildings Approximate Square Feet (unaudited) Weighted Average Occupancy (1) (unaudited) Commercial: Manhattan Office 12 8,180,345 11 13,661,381 23 21,841,726 91.5 % Retail 2 (2) 17,888 9 301,996 11 319,884 91.2 % Development/Redevelopment (1) 6 2,230,282 2 1,618,310 8 3,848,592 N/A Fee Interest 1 7,684 — — 1 7,684 N/A 21 10,436,199 22 15,581,687 43 26,017,886 91.5 % Suburban Office 7 862,800 — — 7 862,800 78.6 % Total commercial properties 28 11,298,999 22 15,581,687 50 26,880,686 91.0 % Residential: Manhattan Residential 2 (2) 222,632 6 445,934 8 668,566 87.9 % Total portfolio 30 11,521,631 28 16,027,621 58 27,549,252 91.0 % (1) The weighted average occupancy for commercial properties represents the total occupied square footage divided by the total square footage at acquisition. The weighted average occupancy for residential properties represents the total occupied units divided by the total available units. Properties under construction are not included in the calculation of weighted average occupancy. (2) As of March 31, 2022, we owned a building at 7 Dey / 185 Broadway that was comprised of approximately 50,206 square feet (unaudited) of retail space and approximately 140,382 square feet (unaudited) of residential space. For the purpose of this report, we have included this building in the number of retail properties we own. However, we have included only the retail square footage in the retail approximate square footage, and have listed the balance of the square footage as residential square footage. As of March 31, 2022, we also manage one office building owned by a third party encompassing approximately 0.3 million square feet (unaudited), and held debt and preferred equity investments with a book value of $1.1 billion, excluding debt and preferred equity investments and other financing receivables totaling less than $0.1 billion that are included in balance sheet line items other than the Debt and preferred equity investments line item. 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, subject to the priority distributions with respect to preferred units and special provisions that apply to Long Term Incentive Plan ("LTIP") Units. 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. Basis of Quarterly Presentation The accompanying unaudited consolidated financial statements have been prepared in accordance with accounting principles generally accepted in the United States for interim financial information and with the instructions to Form 10-Q and Article 10 of Regulation S-X. Accordingly, they do not include all of the information and notes required by accounting principles generally accepted in the United States for complete financial statements. In the opinion of management, all adjustments (consisting of normal recurring accruals) considered necessary for the fair presentation of the financial position of the Company and the Operating Partnership at March 31, 2022 and the results of operations for the periods presented have been included. The operating results for the period presented are not necessarily indicative of the results that may be expected for the year ending December 31, 2022. These financial statements should be read in conjunction with the financial statements and accompanying notes included in the Annual Report on Form 10-K for the year ended December 31, 2021 of the Company and the Operating Partnership. The consolidated balance sheet at December 31, 2021 has been derived from the audited financial statements as of that date but does not include all the information and footnotes required by accounting principles generally accepted in the United States for complete financial statements. Subsequent Events

Significant Accounting Policies

Significant Accounting Policies	3 Months Ended
	Mar. 31, 2022
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. 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 VIE in which we are considered the 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. Investment in Commercial Real Estate Properties 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) over their estimated useful lives, which generally range from 3 years to 40 years. We amortize the amount allocated to the above- and below-market leases over the remaining term of the associated lease, which generally range from 1 year to 15 years, and record it as either an increase (in the case of below-market leases) or a decrease (in the case of above-market leases) to rental income. We amortize the amount allocated to the values associated with in-place leases over the expected term of the associated lease, which generally ranges from 1 year to 15 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 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. The Company classifies those leases under which the Company is the lessee at lease commencement as finance or operating leases. Leases qualify as finance leases if the lease transfers ownership of the asset at the end of the lease term, the lease grants an option to purchase the asset that we are reasonably certain to exercise, the lease term is for a major part of the remaining economic life of the asset, or the present value of the lease payments exceeds substantially all of the fair value of the asset. Leases that do not qualify as finance leases are deemed to be operating leases. At lease commencement the Company records a lease liability which is measured as the present value of the lease payments and a right of use asset which is measured as the amount of the lease liability and any initial direct costs incurred. The Company applies a discount rate to determine the present value of the lease payments. If the rate implicit in the lease is known, the Company uses that rate. If the rate implicit in the lease is not known, the Company uses a discount rate reflective of the Company’s collateralized borrowing rate given the term of the lease. To determine the discount rate, the Company employs a third party specialist to develop an analysis based primarily on the observable borrowing rates of the Company, other REITs, and other corporate borrowers with long-term borrowings. On the consolidated statements of operations, operating leases are expensed through operating lease rent while financing leases are expensed through amortization and interest expense. When applicable, the Company combines the consideration for lease and non-lease components in the calculation of the value of the lease obligation and right-of-use asset. 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) 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 fair value of the property as calculated in accordance with Accounting Standards Codification, or ASC 820. We also evaluate our real estate properties for impairment when a 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 and depreciation expense is no longer recorded. For the three months ended March 31, 2022 and 2021, we recognized a reduction of rental revenue of ($0.1 million) and ($1.9 million), respectively, for the amortization of aggregate above-market leases in excess of below-market leases resulting from the allocation of the purchase price of the applicable properties. The following summarizes our identified intangible assets (acquired above-market leases and in-place leases) and intangible liabilities (acquired below-market leases) as of March 31, 2022 and December 31, 2021 (in thousands): March 31, 2022 December 31, 2021 Identified intangible assets (included in other assets): Gross amount $ 199,722 $ 199,722 Accumulated amortization (184,129) (182,643) Net (1) $ 15,593 $ 17,079 Identified intangible liabilities (included in deferred revenue): Gross amount $ 212,767 $ 212,767 Accumulated amortization (210,454) (210,262) Net (1) $ 2,313 $ 2,505 (1) As of March 31, 2022, no net intangible assets and no net intangible liabilities were reclassified to assets held for sale or liabilities related to assets held for sale. As of December 31, 2021, $1.8 million of net intangible assets and no net intangible liabilities were reclassified to assets held for sale and liabilities related to assets held for sale. Cash and Cash Equivalents We consider all highly liquid investments with maturity of three months or less when purchased to be cash equivalents. 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. Fair Value Measurements See Note 16, "Fair Value Measurements." Investment in Marketable Securities At acquisition, we designate a debt security as held-to-maturity, available-for-sale, or trading. As of March 31, 2022, we did not have any debt securities designated as held-to-maturity or trading. We account for our available-for-sale securities at fair value pursuant to ASC 820-10, with the net unrealized gains or losses reported as a component of accumulated other comprehensive income or loss. The cost of marketable securities sold and the amount reclassified out of accumulated other comprehensive income into earnings is determined using the specific identification method. Credit losses are recognized in accordance with ASC 326. We account for our equity marketable securities at fair value pursuant to ASC 820-10, with the net unrealized gains or losses reported in net income. As of March 31, 2022 and December 31, 2021, we held the following marketable securities (in thousands): March 31, 2022 December 31, 2021 Commercial mortgage-backed securities $ 22,353 $ 24,146 Total marketable securities available-for-sale $ 22,353 $ 24,146 Equity marketable securities $ 10,536 $ 10,606 Total investment in marketable securities $ 32,889 $ 34,752 The cost basis of the commercial mortgage-backed securities was $23.0 million as of March 31, 2022 and as of December 31, 2021. These securities mature at various times through 2035. All securities were in an unrealized gain position as of March 31, 2022 and December 31, 2021 except for one security, which had an unrealized loss of $2.1 million and a fair market value of $5.7 million as of March 31, 2022, and an unrealized loss of $0.6 million and a fair value of $7.2 million as of December 31, 2021. This marketable security was in a continuous unrealized loss position for more than 12 months as of March 31, 2022 and December 31, 2021. We do not intend to sell these securities, and it is more likely than not that we will not be required to sell the investments before recovery of their amortized cost bases. We held equity marketable securities as of March 31, 2022 and December 31, 2021. We recognized $0.1 million of unrealized loss for the three months ended March 31, 2022. We did not hold any equity marketable securities during the three months ended March 31, 2021. We did not dispose of any debt or equity marketable securities during the three months ended March 31, 2022. During the three months ended March 31, 2021, we received aggregate net proceeds of $5.0 million from the repayment of one debt marketable security. 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 each joint ventures' actual and projected cash flows. We do not believe that the values of any of our equity investments were impaired at March 31, 2022. Deferred Lease Costs Deferred lease costs consist of incremental fees and direct costs that would not have been incurred if the lease had not been obtained and are amortized on a straight-line basis over the related lease term. Lease Classification Lease classification for leases under which the Company is the lessor is evaluated at lease commencement and leases not classified as sales-type leases or direct financing leases are classified as operating leases. Leases qualify as sales-type leases if the contract includes either transfer of ownership clauses, certain purchase options, a lease term representing a major part of the economic life of the asset, or the present value of the lease payments and residual guarantees provided by the lessee exceeds substantially all of the fair value of the asset. Additionally, leasing an asset so specialized that it is not deemed to have any value to the Company at the end of the lease term may also result in classification as a sales-type lease. Leases qualify as direct financing leases when the present value of the lease payments and residual value guarantees provided by the lessee and unrelated third parties exceeds substantially all of the fair value of the asset and collection of the payments is probable. Revenue Recognition Rental revenue for operating leases is recognized on a straight-line basis over the term of the lease. Rental revenue recognition commences when the leased space is available for its intended use by the lessee. To determine whether the leased space is available for its intended use by the lessee, management evaluates whether we or the tenant are 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 of tenant improvements, rental revenue recognition begins when the tenant takes possession of or controls the space. 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. In addition to base rent, our tenants also generally will pay variable rent, which represents their pro rata share of increases in real estate taxes and certain operating expenses for the building over a base year. In some leases, in lieu of paying additional rent based upon increases in certain 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. Rental revenue is recognized if collectability is probable. If collectability of substantially all of the lease payments is assessed as not probable, any difference between the rental revenue recognized to date and the lease payments that have been collected is recognized as a current-period adjustment to rental revenue. A subsequent change in the assessment of collectability to probable may result in a current-period adjustment to rental revenue for any difference between the rental revenue that would have been recognized if collectability had always been assessed as probable and the rental revenue recognized to date. The Company provides its tenants with certain customary services for lease contracts such as common area maintenance and general security. We have elected to combine the non-lease components with the lease components of our operating lease agreements and account for them as a single lease component in accordance with ASC 842. We record a gain or loss on sale of real estate assets when we no longer have a controlling financial interest in the entity owning the real estate, a contract exists with a third party and that third party has control of the assets acquired. Investment income on debt and preferred equity investments is accrued based on the contractual terms of the instruments and when it is deemed collectible. Some 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 is collectible. If management cannot make this determination, interest income above the current pay rate is recognized only upon actual receipt. Deferred origination fees, original issue discounts and loan origination costs, if any, are recognized as an adjustment to interest income over the terms of the related investments using the effective interest method. Fees received in connection with loan commitments are also deferred until the loan is funded and are then recognized over the term of the loan as an adjustment to yield. Discounts or premiums associated with the purchase of loans are amortized or accreted into interest income as a yield adjustment on the effective interest method based on expected cash flows through the expected maturity date of the related investment. 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. For debt investments acquired at a discount for credit quality, the difference between contractual cash flows and expected cash flows at acquisition is not accreted. Anticipated exit fees, the collection of which is expected, are also recognized over the term of the loan as an adjustment to yield. We consider a debt and preferred equity investment to be past due when amounts contractually due have not been paid. Debt and preferred equity investments are placed on a non-accrual status 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 on any debt or preferred equity investment that is on non-accrual status when such debt or preferred equity investment becomes contractually current and performance is demonstrated to be resumed. We may syndicate a portion of the loans that we originate or sell the loans individually. When a transaction meets the criteria for sale accounting, we recognize gain or loss based on the difference between the sales price and the carrying value of the loan sold. Any related unamortized deferred origination fees, original issue discounts, loan origination costs, discounts or premiums at the time of sale are recognized as an adjustment to the gain or loss on sale, which is included in investment income on the consolidated statement of operations. Any fees received at the time of sale or syndication are recognized as part of investment income. Asset management fees are recognized on a straight-line basis over the term of the asset management agreement. Debt and Preferred Equity Investments Debt and preferred equity investments are presented at the net amount expected to be collected in accordance with ASC 326. An allowance for loan losses is deducted from the amortized cost basis of the financial assets to present the net carrying value at the amount expected to be collected through the expected maturity date of such investments. The expense for loan loss and other investment reserves is the charge to earnings to adjust the allowance for loan losses to the appropriate level. Amounts are written off from the allowance when we de-recognize the related investment either as a result of a sale of the investment or acquisition of equity interests in the collateral. The Company evaluates the amount expected to be collected based on current market and economic conditions, historical loss information, and reasonable and supportable forecasts. The Company's assumptions are derived from both internal data and external data which may include, among others, governmental economic projections for the New York City Metropolitan area, public data on recent transactions and filings for securitized debt instruments. This information is aggregated by asset class and adjusted for duration. Based on these inputs, loans are evaluated at the individual asset level. In certain instances, we may also use a probability-weighted model that considers the likelihood of multiple outcomes and the amount expected to be collected for each outcome. The evaluation of the possible credit deterioration associated with the performance and/or value of the underlying collateral property as well as the financial and operating capability of the borrower/sponsor requires significant judgment, which include both asset level and market assumptions over the relevant time period. In addition, quarterly, the Company assigns each loan a risk rating. Based on a 3-point scale, loans are rated “1” through “3,” from lower risk to higher risk, which ratings are defined as follows: 1 - Low Risk Assets - Low probability of loss, 2 - Watch List Assets - Higher potential for loss, 3 - High Risk Assets - Loss more likely than not. Loans with risk ratings of 2 or above are evaluated to determine whether the expected risk of loss is appropriately captured through the combination of our expectations of current conditions, historical loss information and supportable forecasts described above or whether risk characteristics specific to the loan warrant the use of a probability-weighted model. Financing investments that are classified as held for sale are carried at the expected amount to be collected 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 expected amount to be collected. Other financing receivables that are included in balance sheet line items other than the Debt and preferred equity investments line are also measured at the net amount expected to be collected. Accrued interest receivable amounts related to these debt and preferred equity investment and other financing receivables are recorded at the net amount expected to be collected within Other assets in the consolidated balance sheets. Accrued interest receivables that are written off are recognized as an expense in loan loss and other investment reserves. 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, SL Green will be subject to Federal income tax on its 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 its 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 operations relates to the Operating Partnership’s consolidated taxable REIT subsidiaries. The Operating Partnership may also be subject to certain state, local and franchise taxes. We have elected, and may elect in the future, to treat certain of our corporate subsidiaries as taxable REIT subsidiaries, or TRSs. In general, TRSs 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 TRSs generate income, resulting in Federal and state income tax liability for these entities. We recorded Federal, state and local tax provisions totaling $0.9 million and $0.7 million during the three months ended March 31, 2022 and 2021, respectively. 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. 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 with high quality financial institutions. The collateral securing our debt and preferred equity investments is located in New York City. See Note 5, "Debt and Preferred Equity Investments." We perform initial and ongoing evaluations of the credit quality of our tenants and require most tenants to provide security deposits or letters of credit. Though these security deposits and letters of credit are insufficient to meet the total value of a tenant's lease obligation, they are a measure of good faith and a potential source of funds to offset the economic costs associated with lost revenue from that tenant and the costs associated with re-tenanting a space. The properties in our real estate portfolio are located in the New York metropolitan area, principally in Manhattan. Our tenants operate in various industries. Other than one tenant, Viacom CBS Inc., which accounted for 6.3% of our share of annualized cash rent as of March 31, 2022, no other tenant in our portfolio accounted for more than 5.0% of our share of annualized cash rent, including our share of joint venture annualized cash rent, as of March 31, 2022. For the three months ended March 31, 2022, the following properties contributed more than 5.0% of our annualized cash rent from office properties, including our share of annualized cash rent from joint venture office properties: Property Three months ended March 31, 2022 One Vanderbilt Avenue 14.3% 11 Madison Avenue 9.3% 420 Lexington Ave 7.0% 1185 Avenue of the Americas 7.0% 1515 Broadway 6.9% 280 Park Avenue 5.8% Reclassification Certain prior year balances have been reclassified to conform to our current year presentation. Accounting Standards Updates In March 2022, the FASB issued ASU No. 2022-02 Financial Instruments - Credit Losses (Topic 326) Troubled Debt Restructurings and Vintage Disclosures. ASU 2022-02 eliminates the troubled debt restructuring recognition and measurement guidance and, instead, requires that an entity evaluate whether the modification represents a new loan or a continuation of an existing loan. The amendments enhance existing disclosure requirements and introduce new requirements related to certain modifications of receivables made to borrowers experiencing financial difficulties. Additionally, ASU 2022-02 requires an entity to disclose current-period gross write-offs by year of origination for financing receivables and net investment in leases within the scope of Subtopic 326-20. Gross write-off information must be included in the vintage disclosures required for entities in accordance with Subtopic 326-20, which requires that an entity disclose the amortized cost basis of financing receivables by credit-quality indicator and class of financing receivable by year of origination. ASU 2022-02 is effective for reporting periods beginning after December 15, 2022, including interim periods within those fiscal years, with early adoption permitted. We are currently evaluating the impact of the adoption of ASU 2022-02 on our consolidated financial statements, but do not believe the adoption of this standard will have a material impact on our consolidated financial statements. In July 2021, the FASB issued ASU No. 2021-05 Leases (Topic 842) Lessors - Certain Leases with Variable Lease Payments. ASU 2021-05 amends the lease classification requirements for lessors when classifying and accounting for a lease with variable lease payments that do not depend on a reference rate index or a rate. The update provides criteria, that if met, the lease would be classified and accounted for as an operating lease. ASU 2021-05 is effective for reporting periods beginning after December 15, 2021. The Company adopted this guidance on January 1, 2022 and it did not have a material impact on the Company's consolidated financial statements. In August 2020, the FASB issued Accounting Standard Update, or "ASU," No. 2020-06 Debt - Debt with Conversion and Other Options (Subtopic 470-20) and Derivatives and Hedging - Contracts in Entity's Own Equity (Subtopic 815-40). ASU 2020-06 simplifies the accounting for convertible instruments by reducing the number of accounting models for convertible debt instruments and convertible preferred stock, removes certain settlement conditions that are required for equity contracts to qualify for the derivative scope exception and also simplifies the diluted earnings per share calculation in certain areas. ASU 2020-06 is effective for reporting periods beginning after December 15, 2021. The Company adopted this guidance on January 1, 2022 and it did not have a material impact on the Company's consolidated financial statements.

Property Acquisitions

Property Acquisitions	3 Months Ended
	Mar. 31, 2022
Business Combinations [Abstract]
Property Acquisitions	Property Acquisitions During the three months ended March 31, 2022, we did not acquire any properties from a third party.

Properties Held for Sale and Pr

Properties Held for Sale and Property Dispositions	3 Months Ended
	Mar. 31, 2022
Discontinued Operations and Disposal Groups [Abstract]
Properties Held for Sale and Property Dispositions	Properties Held for Sale and Property Dispositions Properties Held for Sale As of March 31, 2022, 1080 Amsterdam Avenue was classified as held for sale as we entered into an agreement to sell the property for total consideration of $42.7 million. The sale closed in the second quarter of 2022. Property Dispositions The following table summarizes the properties disposed of during the three months ended March 31, 2022: Property Disposition Date Property Type Approximate Square Feet Sales Price (in millions) Gain (Loss) (in millions) 707 Eleventh Avenue February 2022 Fee Interest 159,720 $ 95.0 $ (0.8)

Debt and Preferred Equity Inves

Debt and Preferred Equity Investments	3 Months Ended
	Mar. 31, 2022
Investments, Debt and Equity Securities [Abstract]
Debt and Preferred Equity Investments	Debt and Preferred Equity Investments Below is a summary of the activity in our debt and preferred equity investments for the three months ended March 31, 2022 and the twelve months ended December 31, 2021 (in thousands): March 31, 2022 December 31, 2021 Balance at beginning of year (1) $ 1,088,723 $ 1,076,542 Debt investment originations/fundings/accretion (2) 16,615 193,824 Preferred equity investment originations/accretion (2) 8,937 13,220 Redemptions/sales/syndications/equity ownership/amortization (3) (6,405) (201,446) Net change in loan loss reserves — 6,583 Balance at end of period (1) $ 1,107,870 $ 1,088,723 (1) Net of unamortized fees, discounts, and premiums. (2) Accretion includes amortization of fees and discounts and paid-in-kind investment income. (3) Certain participations in debt investments that were sold or syndicated, but did not meet the conditions for sale accounting, are included in Other assets and Other liabilities on the consolidated balance sheets. Below is a summary of our debt and preferred equity investments as of March 31, 2022 (dollars in thousands): Floating Rate Fixed Rate Total Carrying Value Senior Financing Weighted Average Yield at End of Period Maturity (1) Type Carrying Value Face Value Interest Rate Carrying Value Face Value Interest Rate Senior Mortgage Debt $ 26,088 $ 26,233 L + 3.50% $ 73,000 $ 73,000 3.00% $ 99,088 $ — 4.25% 2022 - 2023 Mezzanine Debt 276,040 276,670 L + 4.95% - 12.57% 450,799 459,865 2.90% - 14.30% 726,839 4,700,426 6.98% 2022 - 2029 Preferred Equity — — — 281,943 282,403 6.50% - 11.00% 281,943 1,962,750 9.64% 2022 - 2027 Balance at end of period $ 302,128 $ 302,903 $ 805,742 $ 815,268 $ 1,107,870 $ 6,663,176 (1) Excludes available extension options to the extent they have not been exercised as of the date of this filing. The following table is a roll forward of our total allowance for loan losses for the three months ended March 31, 2022 and the twelve months ended December 31, 2021 (in thousands): March 31, 2022 December 31, 2021 Balance at beginning of year $ 6,630 $ 13,213 Write-offs charged against the allowance — (6,583) Balance at end of period (1) $ 6,630 $ 6,630 (1) As of March 31, 2022, all financing receivables on non-accrual had an allowance for loan loss except for one debt investment with a carrying value of $225.4 million. As of March 31, 2022 and December 31, 2021, all debt and preferred equity investments were performing in accordance with their respective terms, with the exception of two investments with a carrying value, net of reserves, of $223.1 million and $6.8 million, as discussed in the Debt Investments and Preferred Equity Investments tables further below. No other financing receivables were 90 days past due as of March 31, 2022 and December 31, 2021. The following table sets forth the carrying value of our debt and preferred equity investment portfolio by risk rating as of March 31, 2022 and December 31, 2021 (dollars in thousands): Risk Rating March 31, 2022 December 31, 2021 1 - Low Risk Assets - Low probability of loss $ 517,330 $ 644,489 2 - Watch List Assets - Higher potential for loss 583,650 437,344 3 - High Risk Assets - Loss more likely than not 6,890 6,890 $ 1,107,870 $ 1,088,723 The following table sets forth the carrying value of our debt and preferred equity investment portfolio by year of origination and risk rating as of March 31, 2022 (dollars in thousands): As of March 31, 2022 Risk Rating 2022 (1) 2021 (1) 2020 (1) Prior (1) Total 1 - Low Risk Assets - Low probability of loss $ — $ 142,264 $ 153,055 $ 222,011 $ 517,330 2 - Watch List Assets - Higher potential for loss — — 135,157 448,493 583,650 3 - High Risk Assets - Loss more likely than not — — — 6,890 6,890 $ — $ 142,264 $ 288,212 $ 677,394 $ 1,107,870 (1) Year in which the investment was originated or acquired by us or in which a material modification occurred. We have determined that we have one portfolio segment of financing receivables as of March 31, 2022 and December 31, 2021 comprised of commercial real estate which is primarily recorded in debt and preferred equity investments. Included in Other assets is an additional amount of financing receivables representing loans to joint venture partners totaling $10.4 million and $10.5 million as of March 31, 2022 and December 31, 2021, respectively. The Company recorded no provisions for loan losses related to these financing receivables for the three months ended March 31, 2022 and 2021. All of these loans have a risk rating of 2 and were performing in accordance with their respective terms. Debt Investments As of March 31, 2022 and December 31, 2021, we held the following debt investments with an aggregate weighted average current yield of 6.65% as of March 31, 2022 (dollars in thousands): Loan Type March 31, 2022 March 31, 2022 Senior March 31, 2022 Carrying Value (1) December 31, 2021 (1) Maturity (2) Fixed Rate Investments: Mezzanine Loan $ — $ 280,000 $ 44,182 $ 43,521 August 2022 Mortgage Loan — — 73,000 73,000 April 2023 Mezzanine Loan (3) — 382,473 225,367 225,367 June 2023 Mezzanine Loan — 276,885 69,264 66,873 June 2023 Mezzanine Loan (4a)(5) — 105,000 13,366 13,366 June 2024 Mezzanine Loan — 95,000 30,000 30,000 January 2025 Mezzanine Loan (6) — 1,712,750 55,250 55,250 June 2027 Mezzanine Loan — 85,000 20,000 20,000 December 2029 Total fixed rate $ — $ 2,937,108 $ 530,429 $ 527,377 Floating Rate Investments: Mezzanine Loan $ — $ 275,000 $ 49,999 $ 49,998 April 2023 Mezzanine Loan 4,624 181,536 37,824 37,511 July 2022 Mezzanine Loan (4b)(7) — 1,115,000 135,157 133,735 April 2022 Mezzanine Loan 3,761 54,000 8,238 8,050 May 2022 Mortgage and Mezzanine Loan 18,142 — 40,161 34,874 December 2022 Mezzanine Loan 33,685 137,783 30,749 30,802 May 2023 Total floating rate $ 60,212 $ 1,763,319 $ 302,128 $ 294,970 Allowance for loan loss — — (6,630) (6,630) Total $ 60,212 $ 4,700,427 $ 825,927 $ 815,717 (1) Carrying value is net of discounts, premiums, original issue discounts and deferred origination fees. (2) Represents contractual maturity, excluding any extension options to the extent they have not been exercised as of the date of this filing. (3) This loan was put on non-accrual in July 2020 and remains on non-accrual as of March 31, 2022. No investment income has been recognized subsequent to it being put on non-accrual. The Company is in discussions with the borrower. (4) Carrying value is net of the following amounts that were sold or syndicated, which are included in Other assets and Other liabilities on the consolidated balance sheets as a result of the transfers not meeting the conditions for sale accounting: (a) $12.0 million, and (b) $0.4 million. (5) This loan went into default and was put on non-accrual in June 2020 and remains on non-accrual as of March 31, 2022. No investment income has been recognized subsequent to it being put on non-accrual. The Company is in discussions with the borrower. Additionally, we determined the borrower entity to be a VIE, in which we are not the primary beneficiary. (6) The borrower under this mezzanine loan is an entity affiliated with HNA, which owns an equity interest in 245 Park Avenue. The borrower filed for bankruptcy protection on October 31, 2021, which the Company contested. (7) In the second quarter of 2022, this loan was extended for two months to May 2022. Preferred Equity Investments As of March 31, 2022 and December 31, 2021, we held the following preferred equity investments with an aggregate weighted average current yield of 9.64% as of March 31, 2022 (dollars in thousands): Type March 31, 2022 March 31, 2022 Senior March 31, 2022 Carrying Value (1) December 31, 2021 (1) Mandatory Redemption (2) Preferred Equity (3) $ — $ 1,712,750 $ 167,875 $ 160,772 June 2022 Preferred Equity — 250,000 114,068 112,234 February 2027 Total Preferred Equity $ — $ 1,962,750 $ 281,943 $ 273,006 Allowance for loan loss — — — — Total $ — $ 1,962,750 $ 281,943 $ 273,006 (1) Carrying value is net of deferred origination fees. (2) Represents contractual redemption, excluding any unexercised extension options. (3) On October 31, 2021, HNA, through an affiliated entity, filed for Chapter 11 bankruptcy protection on account of its investment in 245 Park Avenue, together with another asset in Chicago. The Company contested the filing, on the basis that the filing was done in bad faith and in violation of HNA's agreements with the Company, and is currently appealing the Bankruptcy court's ruling upholding the filing by HNA.

Investments in Unconsolidated J

Investments in Unconsolidated Joint Ventures	3 Months Ended
	Mar. 31, 2022
Equity Method Investments and Joint Ventures [Abstract]
Investments in Unconsolidated Joint Ventures	Investments in Unconsolidated Joint Ventures We have investments in several real estate joint ventures with various partners. As of March 31, 2022, the book value of these investments was $3.0 billion, net of investments with negative book values totaling $105.6 million for which we have an implicit commitment to fund future capital needs. As of March 31, 2022 and December 31, 2021, 800 Third Avenue, 21 East 66th Street, and certain properties within the Stonehenge Portfolio are VIEs in which we are not the primary beneficiary. Our net equity investment in these VIEs was $86.2 million and $85.6 million as of March 31, 2022 and December 31, 2021, respectively. Our maximum loss is limited to the amount of our equity investment in these VIEs. See the "Principles of Consolidation" section of Note 2, "Significant Accounting Policies." All other investments below are voting interest entities. 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 March 31, 2022: Property Partner Ownership (1) Economic (1) Unaudited Approximate Square Feet 100 Park Avenue Prudential Real Estate Investors 49.90% 49.90% 834,000 717 Fifth Avenue Wharton Properties/Private Investor 10.92% 10.92% 119,500 800 Third Avenue Private Investors 60.52% 60.52% 526,000 919 Third Avenue New York State Teacher's Retirement System 51.00% 51.00% 1,454,000 11 West 34th Street Private Investor/Wharton Properties 30.00% 30.00% 17,150 280 Park Avenue Vornado Realty Trust 50.00% 50.00% 1,219,158 1552-1560 Broadway (2) Wharton Properties 50.00% 50.00% 57,718 10 East 53rd Street Canadian Pension Plan Investment Board 55.00% 55.00% 354,300 21 East 66th Street (3) Private Investors 32.28% 32.28% 13,069 650 Fifth Avenue (4) Wharton Properties 50.00% 50.00% 69,214 121 Greene Street Wharton Properties 50.00% 50.00% 7,131 Stonehenge Portfolio (5) Various Various Various 1,439,016 11 Madison Avenue PGIM Real Estate 60.00% 60.00% 2,314,000 One Vanderbilt Avenue National Pension Service of Korea/Hines Interest LP 71.01% 71.01% 1,657,198 Worldwide Plaza RXR Realty / New York REIT 24.95% 24.95% 2,048,725 1515 Broadway Allianz Real Estate of America 56.87% 56.87% 1,750,000 2 Herald Square Israeli Institutional Investor 51.00% 51.00% 369,000 115 Spring Street Private Investor 51.00% 51.00% 5,218 15 Beekman (6) A fund managed by Meritz Alternative Investment Management 20.00% 20.00% 221,884 85 Fifth Avenue Wells Fargo 36.27% 36.27% 12,946 One Madison Avenue (7) National Pension Service of Korea/Hines Interest LP/International Investor 25.50% 25.50% 1,048,700 220 East 42nd Street A fund managed by Meritz Alternative Investment Management 51.00% 51.00% 1,135,000 (1) Ownership interest and economic interest represent the Company's interests in the joint venture as of March 31, 2022. Changes in ownership or economic interests within the current year are disclosed in the notes below. (2) The joint venture also owns a long-term leasehold interest in the retail space and certain other spaces at 1560 Broadway, which is adjacent to 1552 Broadway. (3) We hold a 32.28% interest in three retail units and one residential unit at the property and a 16.14% interest in two residential units at the property. (4) The joint venture owns a long-term leasehold interest in the retail space at 650 Fifth Avenue. (5) The sale of this investment closed in April 2022 for a gross consideration of $1.0 million. (6) In 2020, the Company formed a joint venture, which then entered into a long-term sublease with the Company. (7) In 2020, the Company admitted partners to the One Madison Avenue development project, which resulted in the Company no longer retaining a controlling interest in the entity, as defined in ASC 810, and the deconsolidation of our remaining 50.5% interest. We recorded our investment at fair value, which resulted in the recognition of a fair value adjustment of $187.5 million in 2020. The fair value of our investment was determined by the terms of the joint venture agreement governing the capitalization of the project. The partners have committed aggregate equity to the project totaling no less than $492.2 million and their ownership interest in the joint venture is based on their capital contributions, up to an aggregate maximum of 49.5%. As of March 31, 2022, the total of the two partners' ownership interests based on equity contributed was 39.2%. In 2021, the Company admitted an additional partner to the development project for a committed aggregate equity investment totaling no less than $259.3 million. The partner's indirect ownership interest in the joint venture is based on it's capital contributions, up to an aggregate maximum of 25.0%. The transaction did not meet sale accounting under ASC 860 and, as a result, was treated as a secured borrowing for accounting purposes and is included in Other liabilities in our consolidated balance sheets at March 31, 2022 and December 31, 2021. Disposition of Joint Venture Interests or Properties We did not dispose of any investments in unconsolidated joint ventures during the three months ended March 31, 2022. Joint Venture Mortgages and Other Loans Payable We generally finance our joint ventures with non-recourse debt. In certain cases we may provide guarantees or master leases, which terminate upon the satisfaction of specified circumstances or repayment of the underlying loans. The mortgage notes and other loans payable collateralized by the respective joint venture properties and assignment of leases as of March 31, 2022 and December 31, 2021, respectively, are as follows (dollars in thousands): Property Economic (1) Current Maturity Final Maturity Date (2) Interest Rate (3) March 31, 2022 December 31, 2021 Fixed Rate Debt: 717 Fifth Avenue (mortgage) 10.92 % July 2022 July 2022 4.45 % $ 300,000 $ 300,000 717 Fifth Avenue (mezzanine) 10.92 % July 2022 July 2022 5.50 % 355,328 355,328 650 Fifth Avenue (mortgage) 50.00 % October 2022 October 2022 4.46 % 210,000 210,000 650 Fifth Avenue (mezzanine) 50.00 % October 2022 October 2022 5.45 % 65,000 65,000 21 East 66th Street 32.28 % April 2023 April 2028 3.60 % 12,000 12,000 919 Third Avenue 51.00 % June 2023 June 2023 5.12 % 500,000 500,000 1515 Broadway 56.87 % March 2025 March 2025 3.93 % 796,929 801,845 11 Madison Avenue 60.00 % September 2025 September 2025 3.84 % 1,400,000 1,400,000 800 Third Avenue 60.52 % February 2026 February 2026 3.37 % 177,000 177,000 Worldwide Plaza 24.95 % November 2027 November 2027 3.98 % 1,200,000 1,200,000 One Vanderbilt Avenue 71.01 % July 2031 July 2031 2.95 % 3,000,000 3,000,000 Stonehenge Portfolio (4) Various Various Various 3.50 % 194,558 195,493 Total fixed rate debt $ 8,210,815 $ 8,216,666 Floating Rate Debt: 1552 Broadway 50.00 % October 2022 October 2022 L+ 2.65 % $ 193,132 $ 193,132 280 Park Avenue 50.00 % September 2022 September 2024 L+ 1.73 % 1,200,000 1,200,000 121 Greene Street 50.00 % November 2022 November 2022 L+ 2.00 % 13,056 13,228 2 Herald Square 51.00 % November 2022 November 2023 L+ 1.95 % 199,664 200,989 11 West 34th Street 30.00 % January 2023 January 2023 L+ 1.45 % 23,000 23,000 220 East 42nd Street 51.00 % June 2023 June 2025 L+ 2.75 % 510,000 510,000 115 Spring Street 51.00 % September 2023 September 2023 L+ 3.40 % 65,550 65,550 100 Park Avenue 49.90 % December 2023 December 2025 L+ 2.25 % 360,000 360,000 15 Beekman (5) 20.00 % January 2024 July 2025 L+ 1.50 % 50,805 43,566 10 East 53rd Street 55.00 % February 2025 February 2025 L+ 1.35 % 220,000 220,000 One Madison Avenue (6) 25.50 % November 2025 November 2026 L+ 3.35 % 193,184 169,629 21 East 66th Street 32.28 % June 2033 June 2033 T+ 2.75 % 620 632 Total floating rate debt $ 3,029,011 $ 2,999,726 Total joint venture mortgages and other loans payable $ 11,239,826 $ 11,216,392 Deferred financing costs, net (121,491) (130,516) Total joint venture mortgages and other loans payable, net $ 11,118,335 $ 11,085,876 (1) Economic interest represents the Company's interests in the joint venture as of March 31, 2022. Changes in ownership or economic interests, if any, within the current year are disclosed in the notes to the investment in unconsolidated joint ventures table above. (2) Reflects exercise of all available options. The ability to exercise extension options may be subject to certain conditions, including meeting tests based on the operating performance of the property. (3) Interest rates as of March 31, 2022, taking into account interest rate hedges in effect during the period. Floating rate debt is presented with the stated spread over the 30-day LIBOR ("L") or 1-year Treasury ("T"). (4) Comprised of three mortgages totaling $131.6 million that mature in April 2028 and two mortgages totaling $63.0 million that mature in July 2029. The sale of this investment closed in April 2022. (5) This loan is a $125.0 million construction facility. Advances under the loan are subject to costs incurred. (6) The loan is a $1.25 billion construction facility with an initial term of five years with one, one year extension option. Advances under the loan are subject to costs incurred. In conjunction with the loan, we provided partial guarantees for interest and principal payments, the amounts of which are based on certain construction milestones and operating metrics. We are entitled to receive fees for providing management, leasing, construction supervision and asset management services to certain of our joint ventures. We earned $6.2 million and $2.4 million from these services, net of our ownership share of the joint ventures, for the three months ended March 31, 2022 and 2021, 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 March 31, 2022 and December 31, 2021 are as follows (in thousands): March 31, 2022 December 31, 2021 Assets (1) Commercial real estate property, net $ 14,785,274 $ 14,763,874 Cash and restricted cash 751,944 768,510 Tenant and other receivables, related party receivables, and deferred rents receivable 562,483 533,455 Other assets 1,796,952 1,776,030 Total assets $ 17,896,653 $ 17,841,869 Liabilities and equity (1) Mortgages and other loans payable, net $ 11,118,335 $ 11,085,876 Deferred revenue 1,141,181 1,158,242 Lease liabilities 999,553 980,595 Other liabilities 368,957 352,499 Equity 4,268,627 4,264,657 Total liabilities and equity $ 17,896,653 $ 17,841,869 Company's investments in unconsolidated joint ventures $ 3,000,986 $ 2,997,934 (1) At March 31, 2022, $550.4 million of net unamortized basis differences between the amount at which our investments are carried and our share of equity in net assets of the underlying property will be amortized through equity in net income (loss) from unconsolidated joint ventures over the remaining life of the underlying items having given rise to the differences. The combined statements of operations for the unconsolidated joint ventures, from acquisition date through the three months ended March 31, 2022 and 2021, are as follows (in thousands): Three Months Ended March 31, 2022 2021 Total revenues $ 335,266 $ 301,541 Operating expenses 59,914 46,233 Real estate taxes 60,722 54,592 Operating lease rent 6,268 5,644 Interest expense, net of interest income 94,913 78,749 Amortization of deferred financing costs 6,757 6,384 Depreciation and amortization 112,713 114,879 Total expenses 341,287 306,481 Net loss before gain on sale $ (6,021) $ (4,940) Company's equity in net loss from unconsolidated joint ventures $ (4,715) $ (2,864)

Deferred Costs

Deferred Costs	3 Months Ended
	Mar. 31, 2022
Deferred Costs, Capitalized, Prepaid, and Other Assets Disclosure [Abstract]
Deferred Costs	Deferred Costs Deferred costs as of March 31, 2022 and December 31, 2021 consisted of the following (in thousands): March 31, 2022 December 31, 2021 Deferred leasing costs $ 404,778 $ 400,419 Less: accumulated amortization (282,484) (275,924) Deferred costs, net $ 122,294 $ 124,495

Mortgages and Other Loans Payab

Mortgages and Other Loans Payable	3 Months Ended
	Mar. 31, 2022
Mortgages and Other Loans Payable
Mortgages and Other Loans Payable	Mortgages and Other Loans Payable The mortgages and other loans payable collateralized by the respective properties and assignment of leases or debt investments as of March 31, 2022 and December 31, 2021, respectively, were as follows (dollars in thousands): Property Current Maturity Final Maturity Date (1) Interest Rate (2) March 31, 2022 December 31, 2021 Fixed Rate Debt: 100 Church Street July 2022 July 2022 4.68% $ 198,980 $ 200,212 420 Lexington Avenue October 2024 October 2040 3.99% 287,243 288,660 Landmark Square January 2027 January 2027 4.90% 100,000 100,000 485 Lexington Avenue February 2027 February 2027 4.25% 450,000 450,000 1080 Amsterdam (3) February 2027 February 2027 3.59% 34,348 34,537 Total fixed rate debt $ 1,070,571 $ 1,073,409 Floating Rate Debt: 7 Dey / 185 Broadway (4) November 2022 November 2023 L+ 2.85% $ 203,478 $ 198,169 719 Seventh Avenue September 2023 September 2023 L+ 1.20% 50,000 50,000 690 Madison Avenue July 2024 July 2025 L+ 1.50% 60,000 60,000 609 Fifth Avenue March 2022 March 2025 L+ —% — 52,882 2017 Master Repurchase Agreement (5) — — Total floating rate debt $ 313,478 $ 361,051 Total fixed rate and floating rate debt $ 1,384,049 $ 1,434,460 Mortgages reclassed to liabilities related to assets held for sale (34,348) (34,537) Total mortgages and other loans payable $ 1,349,701 $ 1,399,923 Deferred financing costs, net of amortization (4,926) (5,537) Total mortgages and other loans payable, net $ 1,344,775 $ 1,394,386 (1) Reflects exercise of all available options. The ability to exercise extension options may be subject to certain tests based on the operating performance of the property. (2) Interest rate as of March 31, 2022, taking into account interest rate hedges in effect during the period. Floating rate debt is presented with the stated spread over the 30-day LIBOR, unless otherwise specified. (3) The loan is comprised of a $33.4 million mortgage loan and $0.9 million mezzanine loan with a fixed interest rate of 350 basis points and 700 basis points, respectively, for the first five years and is prepayable without penalty at the end of the fifth year. The Company closed on the sale of this investment in April 2022. (4) This loan is a $225.0 million construction facility, with reductions in interest cost based on meeting certain conditions, and has an initial three year term with two one year extension options. In October 2021, an extension option was exercised, and the maturity date of this loan was extended by one year. Advances under the loan are subject to incurred costs and funded equity requirements. (5) In June 2021, we exercised a one year extension option which extended the maturity date to June 2022. As of March 31, 2022, there was no outstanding balance on the $400 million facility. As of March 31, 2022 and December 31, 2021, the gross book value of the properties collateralizing the mortgages and other loans payable was approximately $1.9 billion and $2.1 billion, respectively. Master Repurchase Agreement The Company entered into a Master Repurchase Agreement, or MRA, known as the 2017 MRA, which provides us with the ability to sell certain mortgage investments with a simultaneous agreement to repurchase the same at a certain date or on demand. We seek to mitigate risks associated with our repurchase agreement by managing the credit quality of our assets, early repayments, interest rate volatility, liquidity, and market value. The margin call provisions under our repurchase facility permit valuation adjustments based on capital markets activity, and are not limited to collateral-specific credit marks. To monitor credit risk associated with our debt investments, our asset management team regularly reviews our investment portfolio and is in contact with our borrowers in order to monitor the collateral and enforce our rights as necessary. The risk associated with potential margin calls is further mitigated by our ability to collateralize the facility with additional assets from our portfolio of debt investments, our ability to satisfy margin calls with cash or cash equivalents and our access to additional liquidity. As of March 31, 2022, there have been no margin calls on the 2017 MRA. In April 2018, we increased the maximum facility capacity from $300.0 million to $400.0 million. The facility bears interest on a floating rate basis at a spread to 30-day LIBOR based on the pledged collateral and advance rate and is scheduled to mature in June 2022. As of March 31, 2022, the facility had no outstanding balance. 2021 Credit Facility In December 2021, we entered into an amended and restated credit facility, referred to as the 2021 credit facility, that was previously amended by the Company in November 2017, or the 2017 credit facility, and was originally entered into by the Company in November 2012, or the 2012 credit facility. As of March 31, 2022, the 2021 credit facility consisted of a $1.25 billion revolving credit facility, a $1.05 billion term loan (or "Term Loan A"), and a $200.0 million term loan (or "Term Loan B") with maturity dates of May 15, 2026, May 15, 2027, and November 21, 2024, respectively. The revolving credit facility has two six-month, as-of-right extension options to May 15, 2027. We also have an option, subject to customary conditions, to increase the capacity of the credit facility to $4.5 billion at any time prior to the maturity dates for the revolving credit facility and term loans without the consent of existing lenders, by obtaining additional commitments from our existing lenders and other financial institutions. As of March 31, 2022, the 2021 credit facility bore interest at a spread over adjusted Term SOFR plus 10 basis points with an interest period of one or three months, as we may elect, ranging from (i) 72.5 basis points to 140 basis points for loans under the revolving credit facility, (ii) 80 basis points to 160 basis points for loans under Term Loan A, and (iii) 85 basis points to 165 basis points for loans under Term Loan B, in each case based on the credit rating assigned to the senior unsecured long term indebtedness of the Company. In instances where there are either only two ratings available or where there are more than two and the difference between them is one rating category, the applicable rating shall be the highest rating. In instances where there are more than two ratings and the difference between the highest and the lowest is two or more rating categories, then the applicable rating used is the average of the highest two, rounded down if the average is not a recognized category. As of March 31, 2022, the applicable spread over adjusted Term SOFR plus 10 basis points was 105 basis points for the revolving credit facility, 120 basis points for Term Loan A, and 125 basis points for Term Loan B. We are required to pay quarterly in arrears a 12.5 to 30 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 the Company. As of March 31, 2022, the facility fee was 20 basis points. As of March 31, 2022, we had $2.0 million of outstanding letters of credit, $500.0 million drawn under the revolving credit facility and $1.25 billion outstanding under the term loan facilities, with total undrawn capacity of $0.75 billion under the 2021 credit facility. As of March 31, 2022 and December 31, 2021, the revolving credit facility had a carrying value of $492.0 million and $381.3 million, respectively, net of deferred financing costs. As of March 31, 2022 and December 31, 2021, the term loan facilities had a carrying value of $1.2 billion and $1.2 billion, respectively, net of deferred financing costs. The Company and the Operating Partnership are borrowers jointly and severally obligated under the 2021 credit facility. The 2021 credit facility includes certain restrictions and covenants (see Restrictive Covenants below). Senior Unsecured Notes The following table sets forth our senior unsecured notes and other related disclosures as of March 31, 2022 and December 31, 2021, respectively, by scheduled maturity date (dollars in thousands): Issuance March 31, 2022 March 31, 2022 December 31, Interest Rate (1) Initial Term Maturity Date October 5, 2017 (2) $ 500,000 $ 499,940 $ 499,913 3.25 % 5 October 2022 November 15, 2012 (3) 300,000 300,728 301,002 4.50 % 10 December 2022 December 17, 2015 (4) 100,000 100,000 100,000 4.27 % 10 December 2025 $ 900,000 $ 900,668 $ 900,915 Deferred financing costs, net — (1,127) (1,607) $ 900,000 $ 899,541 $ 899,308 (1) Interest rate as of March 31, 2022, taking into account interest rate hedges in effect during the period. (2) Issued by the Operating Partnership with the Company as the guarantor. (3) In October 2017, the Company and the Operating Partnership as co-obligors issued an additional $100.0 million of 4.50% senior unsecured notes due December 2022. The notes were priced at 105.334% of par. (4) Issued by the Company and the Operating Partnership as co-obligors. Restrictive Covenants The terms of the 2021 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 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 March 31, 2022 and December 31, 2021, we were in compliance with all such covenants. Junior Subordinated 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 floating rate of 125 basis points over the three-month LIBOR. 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, the 2021 credit facility, trust preferred securities, senior unsecured notes and our share of joint venture debt as of March 31, 2022, including as-of-right extension options, were as follows (in thousands): Scheduled Principal Revolving Unsecured Term Loans Trust Senior Total Joint Remaining 2022 $ 5,962 $ 401,261 $ — $ — $ — $ 800,000 $ 1,207,223 $ 422,442 2023 6,640 50,000 — — — — 56,640 750,696 2024 5,328 332,749 — 200,000 — — 538,077 626,671 2025 873 — — — — 100,000 100,873 1,431,734 2026 904 — 500,000 — — — 500,904 107,230 Thereafter 75 580,257 — 1,050,000 100,000 — 1,730,332 2,435,913 $ 19,782 $ 1,364,267 $ 500,000 $ 1,250,000 $ 100,000 $ 900,000 $ 4,134,049 $ 5,774,686 Consolidated interest expense, excluding capitalized interest, was comprised of the following (in thousands): Three Months Ended March 31, 2022 2021 Interest expense before capitalized interest $ 32,052 $ 39,868 Interest on financing leases 1,237 1,492 Interest capitalized (17,941) (17,583) Interest income (278) (389) Interest expense, net $ 15,070 $ 23,388

Corporate Indebtedness

Corporate Indebtedness	3 Months Ended
	Mar. 31, 2022
Debt Disclosure [Abstract]
Corporate Indebtedness	Mortgages and Other Loans Payable The mortgages and other loans payable collateralized by the respective properties and assignment of leases or debt investments as of March 31, 2022 and December 31, 2021, respectively, were as follows (dollars in thousands): Property Current Maturity Final Maturity Date (1) Interest Rate (2) March 31, 2022 December 31, 2021 Fixed Rate Debt: 100 Church Street July 2022 July 2022 4.68% $ 198,980 $ 200,212 420 Lexington Avenue October 2024 October 2040 3.99% 287,243 288,660 Landmark Square January 2027 January 2027 4.90% 100,000 100,000 485 Lexington Avenue February 2027 February 2027 4.25% 450,000 450,000 1080 Amsterdam (3) February 2027 February 2027 3.59% 34,348 34,537 Total fixed rate debt $ 1,070,571 $ 1,073,409 Floating Rate Debt: 7 Dey / 185 Broadway (4) November 2022 November 2023 L+ 2.85% $ 203,478 $ 198,169 719 Seventh Avenue September 2023 September 2023 L+ 1.20% 50,000 50,000 690 Madison Avenue July 2024 July 2025 L+ 1.50% 60,000 60,000 609 Fifth Avenue March 2022 March 2025 L+ —% — 52,882 2017 Master Repurchase Agreement (5) — — Total floating rate debt $ 313,478 $ 361,051 Total fixed rate and floating rate debt $ 1,384,049 $ 1,434,460 Mortgages reclassed to liabilities related to assets held for sale (34,348) (34,537) Total mortgages and other loans payable $ 1,349,701 $ 1,399,923 Deferred financing costs, net of amortization (4,926) (5,537) Total mortgages and other loans payable, net $ 1,344,775 $ 1,394,386 (1) Reflects exercise of all available options. The ability to exercise extension options may be subject to certain tests based on the operating performance of the property. (2) Interest rate as of March 31, 2022, taking into account interest rate hedges in effect during the period. Floating rate debt is presented with the stated spread over the 30-day LIBOR, unless otherwise specified. (3) The loan is comprised of a $33.4 million mortgage loan and $0.9 million mezzanine loan with a fixed interest rate of 350 basis points and 700 basis points, respectively, for the first five years and is prepayable without penalty at the end of the fifth year. The Company closed on the sale of this investment in April 2022. (4) This loan is a $225.0 million construction facility, with reductions in interest cost based on meeting certain conditions, and has an initial three year term with two one year extension options. In October 2021, an extension option was exercised, and the maturity date of this loan was extended by one year. Advances under the loan are subject to incurred costs and funded equity requirements. (5) In June 2021, we exercised a one year extension option which extended the maturity date to June 2022. As of March 31, 2022, there was no outstanding balance on the $400 million facility. As of March 31, 2022 and December 31, 2021, the gross book value of the properties collateralizing the mortgages and other loans payable was approximately $1.9 billion and $2.1 billion, respectively. Master Repurchase Agreement The Company entered into a Master Repurchase Agreement, or MRA, known as the 2017 MRA, which provides us with the ability to sell certain mortgage investments with a simultaneous agreement to repurchase the same at a certain date or on demand. We seek to mitigate risks associated with our repurchase agreement by managing the credit quality of our assets, early repayments, interest rate volatility, liquidity, and market value. The margin call provisions under our repurchase facility permit valuation adjustments based on capital markets activity, and are not limited to collateral-specific credit marks. To monitor credit risk associated with our debt investments, our asset management team regularly reviews our investment portfolio and is in contact with our borrowers in order to monitor the collateral and enforce our rights as necessary. The risk associated with potential margin calls is further mitigated by our ability to collateralize the facility with additional assets from our portfolio of debt investments, our ability to satisfy margin calls with cash or cash equivalents and our access to additional liquidity. As of March 31, 2022, there have been no margin calls on the 2017 MRA. In April 2018, we increased the maximum facility capacity from $300.0 million to $400.0 million. The facility bears interest on a floating rate basis at a spread to 30-day LIBOR based on the pledged collateral and advance rate and is scheduled to mature in June 2022. As of March 31, 2022, the facility had no outstanding balance. 2021 Credit Facility In December 2021, we entered into an amended and restated credit facility, referred to as the 2021 credit facility, that was previously amended by the Company in November 2017, or the 2017 credit facility, and was originally entered into by the Company in November 2012, or the 2012 credit facility. As of March 31, 2022, the 2021 credit facility consisted of a $1.25 billion revolving credit facility, a $1.05 billion term loan (or "Term Loan A"), and a $200.0 million term loan (or "Term Loan B") with maturity dates of May 15, 2026, May 15, 2027, and November 21, 2024, respectively. The revolving credit facility has two six-month, as-of-right extension options to May 15, 2027. We also have an option, subject to customary conditions, to increase the capacity of the credit facility to $4.5 billion at any time prior to the maturity dates for the revolving credit facility and term loans without the consent of existing lenders, by obtaining additional commitments from our existing lenders and other financial institutions. As of March 31, 2022, the 2021 credit facility bore interest at a spread over adjusted Term SOFR plus 10 basis points with an interest period of one or three months, as we may elect, ranging from (i) 72.5 basis points to 140 basis points for loans under the revolving credit facility, (ii) 80 basis points to 160 basis points for loans under Term Loan A, and (iii) 85 basis points to 165 basis points for loans under Term Loan B, in each case based on the credit rating assigned to the senior unsecured long term indebtedness of the Company. In instances where there are either only two ratings available or where there are more than two and the difference between them is one rating category, the applicable rating shall be the highest rating. In instances where there are more than two ratings and the difference between the highest and the lowest is two or more rating categories, then the applicable rating used is the average of the highest two, rounded down if the average is not a recognized category. As of March 31, 2022, the applicable spread over adjusted Term SOFR plus 10 basis points was 105 basis points for the revolving credit facility, 120 basis points for Term Loan A, and 125 basis points for Term Loan B. We are required to pay quarterly in arrears a 12.5 to 30 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 the Company. As of March 31, 2022, the facility fee was 20 basis points. As of March 31, 2022, we had $2.0 million of outstanding letters of credit, $500.0 million drawn under the revolving credit facility and $1.25 billion outstanding under the term loan facilities, with total undrawn capacity of $0.75 billion under the 2021 credit facility. As of March 31, 2022 and December 31, 2021, the revolving credit facility had a carrying value of $492.0 million and $381.3 million, respectively, net of deferred financing costs. As of March 31, 2022 and December 31, 2021, the term loan facilities had a carrying value of $1.2 billion and $1.2 billion, respectively, net of deferred financing costs. The Company and the Operating Partnership are borrowers jointly and severally obligated under the 2021 credit facility. The 2021 credit facility includes certain restrictions and covenants (see Restrictive Covenants below). Senior Unsecured Notes The following table sets forth our senior unsecured notes and other related disclosures as of March 31, 2022 and December 31, 2021, respectively, by scheduled maturity date (dollars in thousands): Issuance March 31, 2022 March 31, 2022 December 31, Interest Rate (1) Initial Term Maturity Date October 5, 2017 (2) $ 500,000 $ 499,940 $ 499,913 3.25 % 5 October 2022 November 15, 2012 (3) 300,000 300,728 301,002 4.50 % 10 December 2022 December 17, 2015 (4) 100,000 100,000 100,000 4.27 % 10 December 2025 $ 900,000 $ 900,668 $ 900,915 Deferred financing costs, net — (1,127) (1,607) $ 900,000 $ 899,541 $ 899,308 (1) Interest rate as of March 31, 2022, taking into account interest rate hedges in effect during the period. (2) Issued by the Operating Partnership with the Company as the guarantor. (3) In October 2017, the Company and the Operating Partnership as co-obligors issued an additional $100.0 million of 4.50% senior unsecured notes due December 2022. The notes were priced at 105.334% of par. (4) Issued by the Company and the Operating Partnership as co-obligors. Restrictive Covenants The terms of the 2021 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 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 March 31, 2022 and December 31, 2021, we were in compliance with all such covenants. Junior Subordinated 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 floating rate of 125 basis points over the three-month LIBOR. 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, the 2021 credit facility, trust preferred securities, senior unsecured notes and our share of joint venture debt as of March 31, 2022, including as-of-right extension options, were as follows (in thousands): Scheduled Principal Revolving Unsecured Term Loans Trust Senior Total Joint Remaining 2022 $ 5,962 $ 401,261 $ — $ — $ — $ 800,000 $ 1,207,223 $ 422,442 2023 6,640 50,000 — — — — 56,640 750,696 2024 5,328 332,749 — 200,000 — — 538,077 626,671 2025 873 — — — — 100,000 100,873 1,431,734 2026 904 — 500,000 — — — 500,904 107,230 Thereafter 75 580,257 — 1,050,000 100,000 — 1,730,332 2,435,913 $ 19,782 $ 1,364,267 $ 500,000 $ 1,250,000 $ 100,000 $ 900,000 $ 4,134,049 $ 5,774,686 Consolidated interest expense, excluding capitalized interest, was comprised of the following (in thousands): Three Months Ended March 31, 2022 2021 Interest expense before capitalized interest $ 32,052 $ 39,868 Interest on financing leases 1,237 1,492 Interest capitalized (17,941) (17,583) Interest income (278) (389) Interest expense, net $ 15,070 $ 23,388

Related Party Transactions

Related Party Transactions	3 Months Ended
	Mar. 31, 2022
Related Party Transactions [Abstract]
Related Party Transactions	Related Party Transactions Cleaning/ Security/ Messenger and Restoration Services Alliance Building Services, or Alliance, and its affiliates, which provide services to certain properties owned by us, are partially owned by Gary Green, a son of Stephen L. Green, who serves as a member and as the chairman emeritus of our Board of Directors. Alliance’s affiliates include First Quality Maintenance, L.P., or First Quality, Classic Security LLC, Bright Star Couriers LLC and Onyx Restoration Works, and provide cleaning, extermination, security, messenger, and restoration services, respectively. 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 the profit participation, which is included in Other income on the consolidated statements of operations, was $0.7 million and $0.3 million for the three months ended March 31, 2022 and 2021, respectively. We also recorded expenses, inclusive of capitalized expenses, of $4.3 million and $2.3 million for the three months ended March 31, 2022 and 2021, respectively, for these services (excluding services provided directly to tenants). 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 this entity of $0.2 million and $0.1 million for the three months ended March 31, 2022 and 2021, respectively. One Vanderbilt Avenue Investment In December 2016, we entered into agreements with entities owned and controlled by our Chairman and CEO, Marc Holliday, and our President, Andrew Mathias, pursuant to which they agreed to make an investment in our One Vanderbilt project at the appraised fair market value for the interests acquired. This investment entitles these entities to receive approximately 1.50% - 1.80% and 1.00% - 1.20%, respectively, of any profits realized by the Company from its One Vanderbilt project in excess of the Company’s capital contributions. The entities have no right to any return of capital. Accordingly, subject to previously disclosed repurchase rights, these interests will have no value and will not entitle these entities to any amounts (other than limited distributions to cover tax liabilities incurred) unless and until the Company has received distributions from the One Vanderbilt project in excess of the Company’s aggregate investment in the project. In the event that the Company does not realize a profit on its investment in the project (or would not realize a profit based on the value at the time the interests are repurchased), the entities owned and controlled by Messrs. Holliday and Mathias will lose the entire amount of their investment. The entities owned and controlled by Messrs. Holliday and Mathias paid $1.4 million and $1.0 million, respectively, which equaled the fair market value of the interests acquired as of the date the investment agreements were entered into as determined by an independent third party appraisal that we obtained. Messrs. Holliday and Mathias cannot monetize their interests until after stabilization of the property (50% within three years after stabilization and 100% three years or more after stabilization). In addition, the agreement calls for us to repurchase these interests in the event of a sale of One Vanderbilt or a transactional change of control of the Company. We also have the right to repurchase these interests on the 7-year anniversary of the stabilization of the project or upon the occurrence of certain separation events prior to the stabilization of the project relating to each of Messrs. Holliday’s and Mathias’s continued service with us. The price paid upon monetization of the interests will equal the liquidation value of the interests at the time, with the value of One Vanderbilt being based on its sale price, if applicable, or fair market value as determined by an independent third party appraiser. As of March 31, 2022, stabilization of the property was achieved. One Vanderbilt Avenue Leases In November 2018, we entered into a lease agreement with the One Vanderbilt Avenue joint venture covering certain floors at the property. In March 2021, the lease commenced and we relocated our corporate headquarters to the leased space. For the three months ended March 31, 2022 and 2021, we recorded $0.7 million and $0.1 million, respectively, of rent expense under the lease. Additionally, in June 2021, we, through a wholly-owned subsidiary, entered into a lease agreement with the One Vanderbilt Avenue joint venture for SUMMIT One Vanderbilt, which commenced in October 2021. For the three months ended March 31, 2022, we recorded $9.8 million of rent expense under the lease, including percentage rent, of which $6.6 million was recognized as income as a component of Equity in net loss from unconsolidated joint ventures in our consolidated statements of operations. Other We are entitled to receive fees for providing management, leasing, construction supervision and asset management services to certain of our joint ventures as further described in Note 6, "Investments in Unconsolidated Joint Ventures." Amounts due from joint ventures and related parties as of March 31, 2022 and December 31, 2021 consisted of the following (in thousands): March 31, 2022 December 31, 2021 Due from joint ventures $ 31,001 $ 28,204 Other 710 1,204 Related party receivables $ 31,711 $ 29,408

Noncontrolling Interests on the

Noncontrolling Interests on the Company's Consolidated Financial Statements	3 Months Ended
	Mar. 31, 2022
Noncontrolling Interest [Abstract]
Noncontrolling Interests on the Company's Consolidated Financial Statements	Noncontrolling Interests on the Company's Consolidated Financial StatementsNoncontrolling 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 March 31, 2022 and December 31, 2021, the noncontrolling interest unit holders owned 6.00%, or 4,095,291 units, and 5.57%, or 3,781,565 units, of the Operating Partnership, respectively, inclusive of retroactive adjustments to reflect the reverse stock split effectuated by SL Green in January 2022. As of March 31, 2022, 4,095,291 shares of our common stock were reserved for issuance upon the 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 our common stock at the end of the reporting period. Below is a summary of the activity relating to the noncontrolling interests in the Operating Partnership for the three months ended March 31, 2022 and the twelve months ended December 31, 2021 (in thousands): March 31, 2022 December 31, 2021 Balance at beginning of period $ 344,252 $ 358,262 Distributions (4,415) (15,749) Issuance of common units 6,721 18,678 Redemption and conversion of common units (18,272) (53,289) Net income 492 25,457 Accumulated other comprehensive loss allocation 2,277 1,042 Fair value adjustment 43,023 9,851 Balance at end of period $ 374,078 $ 344,252 Preferred Units of Limited Partnership Interest in the Operating Partnership Below is a summary of the preferred units of limited partnership interest in the Operating Partnership as of March 31, 2022: Issuance Stated Distribution Rate Number of Units Authorized Number of Units Issued Number of Units Outstanding Annual Dividend Per Unit (1) Liquidation Preference Per Unit (2) Conversion Price Per Unit (3) Date of Issuance Series A (4) 3.50 % 109,161 109,161 109,161 $ 35.0000 $ 1,000.00 $ — August 2015 Series F 7.00% 60 60 60 70.0000 1,000.00 29.12 January 2007 Series K 3.50% 700,000 563,954 341,677 0.8750 25.00 134.67 August 2014 Series L 4.00% 500,000 378,634 372,634 1.0000 25.00 — August 2014 Series P 4.00% 200,000 200,000 200,000 1.0000 25.00 — July 2015 Series Q 3.50% 268,000 268,000 268,000 0.8750 25.00 148.95 July 2015 Series R 3.50% 400,000 400,000 400,000 0.8750 25.00 154.89 August 2015 Series S 4.00% 1,077,280 1,077,280 1,077,280 1.0000 25.00 — August 2015 Series V 3.50% 40,000 40,000 40,000 0.8750 25.00 — May 2019 Series W (5) (6) 1 1 1 (6) (6) (6) January 2020 (1) Dividends are cumulative, subject to certain provisions. (2) Units are redeemable at any time at par for cash at the option of the unitholder unless otherwise specified. (3) If applicable, 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) the amount shown in the table. (4) Issued through a consolidated subsidiary. The units are convertible on a one-for-one basis, into the Series B Preferred Units of limited partnership interest, or the Subsidiary Series B Preferred Units. The Subsidiary Series B Preferred Units can be converted at any time, at the option of the unitholder, into a number of common stock equal to 6.71348 shares of common stock for each Subsidiary Series B Preferred Unit. As of March 31, 2022, no Subsidiary Series B Preferred Units have been issued. (5) The Series W preferred unit was issued in January 2020 in exchange for the then-outstanding Series O preferred unit. The holder of the Series W preferred unit is entitled to quarterly dividends in an amount calculated as (i) 1,350 multiplied by (ii) the current distribution per common unit of limited partnership in SL Green Operating Partnership. The holder has the right to require the Operating Partnership to repurchase the Series W unit for cash, or convert the Series W unit for Class B units, in each case at a price that is determined based on the closing price of the Company's common stock at the time such right is exercised. The unit's liquidation preference is the fair market value of the unit plus accrued distributions at the time of a liquidation event. Below is a summary of the activity relating to the preferred units in the Operating Partnership for the three months ended March 31, 2022 and the twelve months ended December 31, 2021 (in thousands): March 31, 2022 December 31, 2021 Balance at beginning of period $ 196,075 $ 202,169 Issuance of preferred units — — Redemption of preferred units (17,967) (6,040) Dividends paid on preferred units (1,662) (6,760) Accrued dividends on preferred units 1,497 6,706 Balance at end of period $ 177,943 $ 196,075

Stockholders' Equity of the Com

Stockholders' Equity of the Company	3 Months Ended
	Mar. 31, 2022
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 March 31, 2022, 64,124,447 shares of common stock and no shares of excess stock were issued and outstanding. On December 2, 2021, our Board of Directors declared an ordinary dividend of $0.3108 per share and a special dividend of $2.4392 per share (together, "the Total Dividend"). The Total Dividend was paid on January 18, 2022 to shareholders of record at the close of business on December 15, 2021 ("the Record Date"). Shareholders had the opportunity to elect to receive the Total Dividend in the form of all cash or all stock, subject to proration if either option was oversubscribed. As a result of the elections made, the cash option was oversubscribed and was prorated. Shareholders who elected to receive cash received, for each share of common stock they owned as of the Record Date, approximately $0.3976 in cash and 0.0295 shares of common stock. Shareholders who elected to receive shares received, for each share of common stock they owned as of the Record Date, approximately 0.0345 shares of common stock. The number of shares issued was calculated based on the volume weighted average trading price of SLG's common stock between January 5-7, 2022 of $79.71 per share. To mitigate the dilutive impact of the common stock issued in the special dividend, the Board of Directors also authorized a reverse stock split, which was effective after markets closed on January 21, 2022. On January 10, 2022, a committee of the Board of Directors calculated the ratio for the reverse stock split of our issued and outstanding shares of common stock as 1.03060-for-1. After the issuance of the dividend and the completion of the reverse stock split, the number of shares of our common stock outstanding was equivalent to the number of total shares outstanding on the Record Date (not including any issuances or repurchases that occurred following the Record Date, as well as any fractional shares that would have been issued but for which cash-in-lieu was paid). However, on a relative basis, some individual shareholders may have more shares of SLG’s common stock, and some individual shareholders may have fewer shares of our common stock, depending on their individual elections to receive cash or stock and as a result of the cash option being oversubscribed. All share-related references and measurements including the number of shares outstanding, share prices, number of shares repurchased, earnings per share, dividends per share, and share-based compensation awards, have been retroactively adjusted to reflect the reverse stock split for all periods presented in this Quarterly Report on Form 10-Q. Share Repurchase Program In August 2016, our Board of Directors approved a $1.0 billion share repurchase program under which we can buy shares of our common stock. The Board of Directors has since authorized five separate $500.0 million increases to the size of the share repurchase program in the fourth quarter of 2017, second quarter of 2018, fourth quarter of 2018, fourth quarter of 2019, and fourth quarter of 2020 bringing the total program size to $3.5 billion. As of March 31, 2022, share repurchases executed under the program, excluding the redemption of OP units, were as follows: Period Shares repurchased Average price paid per share Cumulative number of shares repurchased as part of the repurchase plan or programs Year ended 2017 7,865,206 $107.81 7,865,206 Year ended 2018 9,187,480 $102.06 17,052,686 Year ended 2019 4,333,260 $88.69 21,385,946 Year ended 2020 8,276,032 $64.30 29,661,978 Year ended 2021 4,474,649 $75.44 34,136,627 Three months ended March 31, 2022 1,971,092 $76.69 36,107,719 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 any time, in whole or from time to time in part, at par for cash. 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. Dividend Reinvestment and Stock Purchase Plan ("DRSPP") In February 2021, the Company filed a registration statement with the SEC for our dividend reinvestment and stock purchase plan, or DRSPP, which automatically became effective upon filing. The Company registered 3,500,000 shares of our common stock under the DRSPP. The DRSPP commenced on September 24, 2001. The following table summarizes SL Green common stock issued, and proceeds received from dividend reinvestments and/or stock purchases under the DRSPP for the three months ended March 31, 2022 and 2021, respectively (dollars in thousands): Three Months Ended March 31, 2022 2021 Shares of common stock issued 1,132 5,320 Dividend reinvestments/stock purchases under the DRSPP $ 89 $ 351 Earnings per Share We use the two-class method of computing earnings per share (“EPS”), which is an earnings allocation formula that determines EPS for common stock and any participating securities according to dividends declared (whether paid or unpaid). Under the two-class method, basic EPS is computed by dividing the income available to common stockholders by the weighted-average number of common stock shares outstanding for the period. Diluted EPS reflects the potential dilution that could occur from share equivalent activity. SL Green's earnings per share for the three months ended March 31, 2022 and 2021 are computed as follows (in thousands): Three Months Ended March 31, Numerator 2022 2021 Basic Earnings: Income (loss) attributable to SL Green common stockholders $ 7,751 $ (7,464) Less: distributed earnings allocated to participating securities (335) (364) Net income (loss) attributable to SL Green common stockholders (numerator for basic earnings per share) $ 7,416 $ (7,828) Add back: dilutive effect of earnings allocated to participating securities and contingently issuable shares (96) 7 Add back: effect of dilutive securities (redemption of units to common shares) 492 (476) Net income (loss) attributable to SL Green common stockholders (numerator for diluted earnings per share) $ 7,812 $ (8,297) Three Months Ended March 31, Denominator 2022 2021 Basic Shares: Weighted average common stock outstanding 64,349 66,961 Effect of Dilutive Securities: Operating Partnership units redeemable for common shares 4,121 4,148 Stock-based compensation plans 984 588 Contingently issuable shares 774 307 Diluted weighted average common stock outstanding 70,228 72,004 The Company has excluded 351,927 and 1,124,920 common stock equivalents from the calculation of diluted shares outstanding for the three months ended March 31, 2022 and 2021, respectively, as they were anti-dilutive. The Company is the sole managing general partner of the Operating Partnership and at March 31, 2022 owned 64,124,447 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. All unit-related references and measurements including the number of units outstanding and earnings per unit have been retroactively adjusted to reflect the reverse stock split effectuated by SL Green’s Board of Directors in January 2021 for all periods presented in this Quarterly Report on Form 10-Q. Limited Partner Units As of March 31, 2022, limited partners other than SL Green owned 6.00%, or 4,095,291 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 The Operating Partnership's earnings per unit for the three months ended March 31, 2022 and 2021, respectively, are computed as follows (in thousands): Three Months Ended March 31, Numerator 2022 2021 Basic Earnings: Net income attributable to SLGOP common unitholders (numerator for diluted earnings per unit) $ 8,243 $ (7,940) Less: distributed earnings allocated to participating securities (335) (364) Net Income attributable to SLGOP common unitholders (numerator for basic earnings per unit) $ 7,908 $ (8,304) Add back: dilutive effect of earnings allocated to participating securities and contingently issuable shares (96) 7 Net Income attributable to SLGOP common unitholders (numerator for diluted earnings per unit) $ 7,812 $ (8,297) Three Months Ended March 31, Denominator 2022 2021 Basic units: Weighted average common units outstanding 68,470 71,109 Effect of Dilutive Securities: Stock-based compensation plans 984 588 Contingently issuable units 774 307 Diluted weighted average common units outstanding 70,228 72,004 The Operating Partnership has excluded 351,927 and 1,124,920 common unit equivalents from the diluted units outstanding for the three months ended March 31, 2022 and 2021, respectively, as they were anti-dilutive. The following tables set forth the changes in accumulated other comprehensive loss by component as of March 31, 2022 (in thousands): Net unrealized gain (loss) on derivative instruments ( 1 ) SL Green’s share of joint venture net unrealized loss on derivative instruments ( 2 ) Net unrealized (loss) gain on marketable securities Total Balance at December 31, 2021 $ (25,881) $ (21,994) $ 1,117 $ (46,758) Other comprehensive gain before reclassifications 26,790 9,785 (1,691) 34,884 Amounts reclassified from accumulated other comprehensive loss 3,649 964 — 4,613 Balance at March 31, 2022 $ 4,558 $ (11,245) $ (574) $ (7,261) (1) Amount reclassified from accumulated other comprehensive loss is included in interest expense in the respective consolidated statements of operations. As of March 31, 2022 and December 31, 2021, the deferred net gains from these terminated hedges, which is included in accumulated other comprehensive loss relating to net unrealized loss on derivative instruments, was $(0.6) million and $(0.6) million, respectively. (2) Amount reclassified from accumulated other comprehensive loss is included in equity in net loss from unconsolidated joint ventures in the respective consolidated statements of operations.

Partners' Capital of the Operat

Partners' Capital of the Operating Partnership	3 Months Ended
	Mar. 31, 2022
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 March 31, 2022, 64,124,447 shares of common stock and no shares of excess stock were issued and outstanding. On December 2, 2021, our Board of Directors declared an ordinary dividend of $0.3108 per share and a special dividend of $2.4392 per share (together, "the Total Dividend"). The Total Dividend was paid on January 18, 2022 to shareholders of record at the close of business on December 15, 2021 ("the Record Date"). Shareholders had the opportunity to elect to receive the Total Dividend in the form of all cash or all stock, subject to proration if either option was oversubscribed. As a result of the elections made, the cash option was oversubscribed and was prorated. Shareholders who elected to receive cash received, for each share of common stock they owned as of the Record Date, approximately $0.3976 in cash and 0.0295 shares of common stock. Shareholders who elected to receive shares received, for each share of common stock they owned as of the Record Date, approximately 0.0345 shares of common stock. The number of shares issued was calculated based on the volume weighted average trading price of SLG's common stock between January 5-7, 2022 of $79.71 per share. To mitigate the dilutive impact of the common stock issued in the special dividend, the Board of Directors also authorized a reverse stock split, which was effective after markets closed on January 21, 2022. On January 10, 2022, a committee of the Board of Directors calculated the ratio for the reverse stock split of our issued and outstanding shares of common stock as 1.03060-for-1. After the issuance of the dividend and the completion of the reverse stock split, the number of shares of our common stock outstanding was equivalent to the number of total shares outstanding on the Record Date (not including any issuances or repurchases that occurred following the Record Date, as well as any fractional shares that would have been issued but for which cash-in-lieu was paid). However, on a relative basis, some individual shareholders may have more shares of SLG’s common stock, and some individual shareholders may have fewer shares of our common stock, depending on their individual elections to receive cash or stock and as a result of the cash option being oversubscribed. All share-related references and measurements including the number of shares outstanding, share prices, number of shares repurchased, earnings per share, dividends per share, and share-based compensation awards, have been retroactively adjusted to reflect the reverse stock split for all periods presented in this Quarterly Report on Form 10-Q. Share Repurchase Program In August 2016, our Board of Directors approved a $1.0 billion share repurchase program under which we can buy shares of our common stock. The Board of Directors has since authorized five separate $500.0 million increases to the size of the share repurchase program in the fourth quarter of 2017, second quarter of 2018, fourth quarter of 2018, fourth quarter of 2019, and fourth quarter of 2020 bringing the total program size to $3.5 billion. As of March 31, 2022, share repurchases executed under the program, excluding the redemption of OP units, were as follows: Period Shares repurchased Average price paid per share Cumulative number of shares repurchased as part of the repurchase plan or programs Year ended 2017 7,865,206 $107.81 7,865,206 Year ended 2018 9,187,480 $102.06 17,052,686 Year ended 2019 4,333,260 $88.69 21,385,946 Year ended 2020 8,276,032 $64.30 29,661,978 Year ended 2021 4,474,649 $75.44 34,136,627 Three months ended March 31, 2022 1,971,092 $76.69 36,107,719 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 any time, in whole or from time to time in part, at par for cash. 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. Dividend Reinvestment and Stock Purchase Plan ("DRSPP") In February 2021, the Company filed a registration statement with the SEC for our dividend reinvestment and stock purchase plan, or DRSPP, which automatically became effective upon filing. The Company registered 3,500,000 shares of our common stock under the DRSPP. The DRSPP commenced on September 24, 2001. The following table summarizes SL Green common stock issued, and proceeds received from dividend reinvestments and/or stock purchases under the DRSPP for the three months ended March 31, 2022 and 2021, respectively (dollars in thousands): Three Months Ended March 31, 2022 2021 Shares of common stock issued 1,132 5,320 Dividend reinvestments/stock purchases under the DRSPP $ 89 $ 351 Earnings per Share We use the two-class method of computing earnings per share (“EPS”), which is an earnings allocation formula that determines EPS for common stock and any participating securities according to dividends declared (whether paid or unpaid). Under the two-class method, basic EPS is computed by dividing the income available to common stockholders by the weighted-average number of common stock shares outstanding for the period. Diluted EPS reflects the potential dilution that could occur from share equivalent activity. SL Green's earnings per share for the three months ended March 31, 2022 and 2021 are computed as follows (in thousands): Three Months Ended March 31, Numerator 2022 2021 Basic Earnings: Income (loss) attributable to SL Green common stockholders $ 7,751 $ (7,464) Less: distributed earnings allocated to participating securities (335) (364) Net income (loss) attributable to SL Green common stockholders (numerator for basic earnings per share) $ 7,416 $ (7,828) Add back: dilutive effect of earnings allocated to participating securities and contingently issuable shares (96) 7 Add back: effect of dilutive securities (redemption of units to common shares) 492 (476) Net income (loss) attributable to SL Green common stockholders (numerator for diluted earnings per share) $ 7,812 $ (8,297) Three Months Ended March 31, Denominator 2022 2021 Basic Shares: Weighted average common stock outstanding 64,349 66,961 Effect of Dilutive Securities: Operating Partnership units redeemable for common shares 4,121 4,148 Stock-based compensation plans 984 588 Contingently issuable shares 774 307 Diluted weighted average common stock outstanding 70,228 72,004 The Company has excluded 351,927 and 1,124,920 common stock equivalents from the calculation of diluted shares outstanding for the three months ended March 31, 2022 and 2021, respectively, as they were anti-dilutive. The Company is the sole managing general partner of the Operating Partnership and at March 31, 2022 owned 64,124,447 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. All unit-related references and measurements including the number of units outstanding and earnings per unit have been retroactively adjusted to reflect the reverse stock split effectuated by SL Green’s Board of Directors in January 2021 for all periods presented in this Quarterly Report on Form 10-Q. Limited Partner Units As of March 31, 2022, limited partners other than SL Green owned 6.00%, or 4,095,291 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 The Operating Partnership's earnings per unit for the three months ended March 31, 2022 and 2021, respectively, are computed as follows (in thousands): Three Months Ended March 31, Numerator 2022 2021 Basic Earnings: Net income attributable to SLGOP common unitholders (numerator for diluted earnings per unit) $ 8,243 $ (7,940) Less: distributed earnings allocated to participating securities (335) (364) Net Income attributable to SLGOP common unitholders (numerator for basic earnings per unit) $ 7,908 $ (8,304) Add back: dilutive effect of earnings allocated to participating securities and contingently issuable shares (96) 7 Net Income attributable to SLGOP common unitholders (numerator for diluted earnings per unit) $ 7,812 $ (8,297) Three Months Ended March 31, Denominator 2022 2021 Basic units: Weighted average common units outstanding 68,470 71,109 Effect of Dilutive Securities: Stock-based compensation plans 984 588 Contingently issuable units 774 307 Diluted weighted average common units outstanding 70,228 72,004 The Operating Partnership has excluded 351,927 and 1,124,920 common unit equivalents from the diluted units outstanding for the three months ended March 31, 2022 and 2021, respectively, as they were anti-dilutive. The following tables set forth the changes in accumulated other comprehensive loss by component as of March 31, 2022 (in thousands): Net unrealized gain (loss) on derivative instruments ( 1 ) SL Green’s share of joint venture net unrealized loss on derivative instruments ( 2 ) Net unrealized (loss) gain on marketable securities Total Balance at December 31, 2021 $ (25,881) $ (21,994) $ 1,117 $ (46,758) Other comprehensive gain before reclassifications 26,790 9,785 (1,691) 34,884 Amounts reclassified from accumulated other comprehensive loss 3,649 964 — 4,613 Balance at March 31, 2022 $ 4,558 $ (11,245) $ (574) $ (7,261) (1) Amount reclassified from accumulated other comprehensive loss is included in interest expense in the respective consolidated statements of operations. As of March 31, 2022 and December 31, 2021, the deferred net gains from these terminated hedges, which is included in accumulated other comprehensive loss relating to net unrealized loss on derivative instruments, was $(0.6) million and $(0.6) million, respectively. (2) Amount reclassified from accumulated other comprehensive loss is included in equity in net loss from unconsolidated joint ventures in the respective consolidated statements of operations.

Share-based Compensation

Share-based Compensation	3 Months Ended
	Mar. 31, 2022
Share-based Payment Arrangement [Abstract]
Share-based Compensation	Share-based Compensation We have share-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. The Fourth Amended and Restated 2005 Stock Option and Incentive Plan, or the 2005 Plan, was approved by the Company's Board of Directors in April 2016 and its stockholders in June 2016 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, cash-based awards and other equity-based awards. Subject to adjustments upon certain corporate transactions or events, awards with respect to up to a maximum of 27,030,000 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 3.74 Fungible Units per share subject to such awards, (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 0.73 fungible units per share subject to such awards, and (3) all other awards (e.g., 10-year stock options) counting as 1.0 fungible units per share subject to such awards. Awards granted under the 2005 Plan prior to the approval of the fourth amendment and restatement in June 2016 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 27,030,000 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 our 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 Company's Board of Directors, new awards may be granted under the 2005 Plan until June 2, 2026, which is the tenth anniversary of the date that the 2005 Plan was most recently approved by the Company's stockholders. As of March 31, 2022, 0.2 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. A proposal to increase the 2005 Plan by 5,180,000 fungible units was approved by the Board of Directors in April 2022 and will be voted upon at the Company's annual meeting of stockholders on June 1, 2022. Stock Options and Class O LTIP Units Options are granted with an exercise price at the fair market value of the Company's common stock on the date of grant and, subject to employment, generally expire five years or ten years from the date of grant, are not transferable other than on death, and generally vest in one year to five years commencing one year from the date of grant. We have also granted Class O LTIP Units, which are a class of LTIP Units in the Operating Partnership structured to provide economics similar to those of stock options. Class O LTIP Units, once vested, may be converted, at the election of the holder, into a number of common units of the Operating Partnership per Class O LTIP Unit determined by the increase in value of a share of the Company’s common stock at the time of conversion over a participation threshold, which equals the fair market value of a share of the Company’s common stock at the time of grant. Class O LTIP Units are entitled to distributions, subject to vesting, equal per unit to 10% of the per unit distributions paid with respect to the common units of the Operating Partnership. The fair value of each stock option or LTIP Unit granted is estimated on the date of grant using the Black-Scholes option pricing model based on historical information. There were no options granted during the three months ended March 31, 2022 or the year ended December 31, 2021. A summary of the status of the Company's stock options as of March 31, 2022 and December 31, 2021, and changes during the three months ended March 31, 2022 and year ended December 31, 2021 are as follows: March 31, 2022 December 31, 2021 Options Outstanding Weighted Average Options Outstanding Weighted Average Balance at beginning of period 394,089 $ 100.56 761,686 $ 105.76 Exercised — — (11,314) 72.30 Lapsed or canceled (28,283) 112.48 (356,283) 112.56 Balance at end of period 365,806 $ 99.64 394,089 $ 100.56 Options exercisable at end of period 365,806 $ 99.64 394,089 $ 100.56 The remaining weighted average contractual life of the options outstanding was 2.3 years and the remaining average contractual life of the options exercisable was 2.3 years. During the three months ended March 31, 2022, we recognized no compensation expense related to options. During the three months ended March 31, 2021, we recognized no compensation expense related to options. As of March 31, 2022, there was no unrecognized compensation cost related to unvested stock options. Restricted Shares Shares are granted to certain employees, including our executives, and vesting occurs upon the completion of a service period or our meeting established financial performance criteria. Vesting occurs at rates ranging from 15% to 35% once performance criteria are reached. A summary of the Company's restricted stock as of March 31, 2022 and December 31, 2021 and changes during the three months ended March 31, 2022 and the year ended December 31, 2021, are as follows: March 31, 2022 December 31, 2021 Balance at beginning of period 3,459,363 3,337,545 Granted 77,148 141,515 Canceled (9,075) (19,697) Balance at end of period 3,527,436 3,459,363 Vested during the period 116,862 122,759 Compensation expense recorded $ 1,920,738 $ 8,497,054 Total fair value of restricted stock granted during the period $ 5,931,470 $ 9,214,531 The fair value of restricted stock that vested during the three months ended March 31, 2022 and the year ended December 31, 2021 was $9.6 million and $11.3 million, respectively. As of March 31, 2022, there was $10.3 million of total unrecognized compensation cost related to restricted stock, which is expected to be recognized over a weighted average period of 1.5 years. We granted LTIP Units, which include bonus, time-based and performance-based awards, with a fair value of $38.6 million and $55.0 million as of March 31, 2022 and December 31, 2021, respectively. The grant date fair value of the LTIP Unit awards was calculated in accordance with ASC 718. A third party consultant determined that the fair value of the LTIP Units has a discount to our 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 March 31, 2022, there was $72.8 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 1.9 years. During the three months ended March 31, 2022, we recorded compensation expense related to bonus, time-based and performance based awards of $10.2 million. During the three months ended March 31, 2021, we recorded compensation expense related to bonus, time-based and performance based awards of $9.1 million. For the three months ended March 31, 2022, $0.3 million was capitalized to assets associated with compensation expense related to our long-term compensation plans, restricted stock and stock options. For the three months ended March 31, 2021, $0.5 million was capitalized to assets associated with compensation expense related to our long-term compensation plans, restricted stock and stock options. 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 the 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 our 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 three months ended March 31, 2022, 14,261 phantom stock units and 9,207 shares of common stock were issued to our Board of Directors. We recorded compensation expense of $1.8 million and $1.8 million during the three months ended March 31, 2022 and 2021, respectively, related to the Deferred Compensation Plan. As of March 31, 2022, there were 179,462 phantom stock units outstanding pursuant to our Non-Employee Director's Deferral Program. Employee Stock Purchase Plan

Accumulated Other Comprehensive

Accumulated Other Comprehensive Loss	3 Months Ended
	Mar. 31, 2022
Equity [Abstract]
Accumulated Other Comprehensive Loss	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 March 31, 2022, 64,124,447 shares of common stock and no shares of excess stock were issued and outstanding. On December 2, 2021, our Board of Directors declared an ordinary dividend of $0.3108 per share and a special dividend of $2.4392 per share (together, "the Total Dividend"). The Total Dividend was paid on January 18, 2022 to shareholders of record at the close of business on December 15, 2021 ("the Record Date"). Shareholders had the opportunity to elect to receive the Total Dividend in the form of all cash or all stock, subject to proration if either option was oversubscribed. As a result of the elections made, the cash option was oversubscribed and was prorated. Shareholders who elected to receive cash received, for each share of common stock they owned as of the Record Date, approximately $0.3976 in cash and 0.0295 shares of common stock. Shareholders who elected to receive shares received, for each share of common stock they owned as of the Record Date, approximately 0.0345 shares of common stock. The number of shares issued was calculated based on the volume weighted average trading price of SLG's common stock between January 5-7, 2022 of $79.71 per share. To mitigate the dilutive impact of the common stock issued in the special dividend, the Board of Directors also authorized a reverse stock split, which was effective after markets closed on January 21, 2022. On January 10, 2022, a committee of the Board of Directors calculated the ratio for the reverse stock split of our issued and outstanding shares of common stock as 1.03060-for-1. After the issuance of the dividend and the completion of the reverse stock split, the number of shares of our common stock outstanding was equivalent to the number of total shares outstanding on the Record Date (not including any issuances or repurchases that occurred following the Record Date, as well as any fractional shares that would have been issued but for which cash-in-lieu was paid). However, on a relative basis, some individual shareholders may have more shares of SLG’s common stock, and some individual shareholders may have fewer shares of our common stock, depending on their individual elections to receive cash or stock and as a result of the cash option being oversubscribed. All share-related references and measurements including the number of shares outstanding, share prices, number of shares repurchased, earnings per share, dividends per share, and share-based compensation awards, have been retroactively adjusted to reflect the reverse stock split for all periods presented in this Quarterly Report on Form 10-Q. Share Repurchase Program In August 2016, our Board of Directors approved a $1.0 billion share repurchase program under which we can buy shares of our common stock. The Board of Directors has since authorized five separate $500.0 million increases to the size of the share repurchase program in the fourth quarter of 2017, second quarter of 2018, fourth quarter of 2018, fourth quarter of 2019, and fourth quarter of 2020 bringing the total program size to $3.5 billion. As of March 31, 2022, share repurchases executed under the program, excluding the redemption of OP units, were as follows: Period Shares repurchased Average price paid per share Cumulative number of shares repurchased as part of the repurchase plan or programs Year ended 2017 7,865,206 $107.81 7,865,206 Year ended 2018 9,187,480 $102.06 17,052,686 Year ended 2019 4,333,260 $88.69 21,385,946 Year ended 2020 8,276,032 $64.30 29,661,978 Year ended 2021 4,474,649 $75.44 34,136,627 Three months ended March 31, 2022 1,971,092 $76.69 36,107,719 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 any time, in whole or from time to time in part, at par for cash. 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. Dividend Reinvestment and Stock Purchase Plan ("DRSPP") In February 2021, the Company filed a registration statement with the SEC for our dividend reinvestment and stock purchase plan, or DRSPP, which automatically became effective upon filing. The Company registered 3,500,000 shares of our common stock under the DRSPP. The DRSPP commenced on September 24, 2001. The following table summarizes SL Green common stock issued, and proceeds received from dividend reinvestments and/or stock purchases under the DRSPP for the three months ended March 31, 2022 and 2021, respectively (dollars in thousands): Three Months Ended March 31, 2022 2021 Shares of common stock issued 1,132 5,320 Dividend reinvestments/stock purchases under the DRSPP $ 89 $ 351 Earnings per Share We use the two-class method of computing earnings per share (“EPS”), which is an earnings allocation formula that determines EPS for common stock and any participating securities according to dividends declared (whether paid or unpaid). Under the two-class method, basic EPS is computed by dividing the income available to common stockholders by the weighted-average number of common stock shares outstanding for the period. Diluted EPS reflects the potential dilution that could occur from share equivalent activity. SL Green's earnings per share for the three months ended March 31, 2022 and 2021 are computed as follows (in thousands): Three Months Ended March 31, Numerator 2022 2021 Basic Earnings: Income (loss) attributable to SL Green common stockholders $ 7,751 $ (7,464) Less: distributed earnings allocated to participating securities (335) (364) Net income (loss) attributable to SL Green common stockholders (numerator for basic earnings per share) $ 7,416 $ (7,828) Add back: dilutive effect of earnings allocated to participating securities and contingently issuable shares (96) 7 Add back: effect of dilutive securities (redemption of units to common shares) 492 (476) Net income (loss) attributable to SL Green common stockholders (numerator for diluted earnings per share) $ 7,812 $ (8,297) Three Months Ended March 31, Denominator 2022 2021 Basic Shares: Weighted average common stock outstanding 64,349 66,961 Effect of Dilutive Securities: Operating Partnership units redeemable for common shares 4,121 4,148 Stock-based compensation plans 984 588 Contingently issuable shares 774 307 Diluted weighted average common stock outstanding 70,228 72,004 The Company has excluded 351,927 and 1,124,920 common stock equivalents from the calculation of diluted shares outstanding for the three months ended March 31, 2022 and 2021, respectively, as they were anti-dilutive. The Company is the sole managing general partner of the Operating Partnership and at March 31, 2022 owned 64,124,447 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. All unit-related references and measurements including the number of units outstanding and earnings per unit have been retroactively adjusted to reflect the reverse stock split effectuated by SL Green’s Board of Directors in January 2021 for all periods presented in this Quarterly Report on Form 10-Q. Limited Partner Units As of March 31, 2022, limited partners other than SL Green owned 6.00%, or 4,095,291 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 The Operating Partnership's earnings per unit for the three months ended March 31, 2022 and 2021, respectively, are computed as follows (in thousands): Three Months Ended March 31, Numerator 2022 2021 Basic Earnings: Net income attributable to SLGOP common unitholders (numerator for diluted earnings per unit) $ 8,243 $ (7,940) Less: distributed earnings allocated to participating securities (335) (364) Net Income attributable to SLGOP common unitholders (numerator for basic earnings per unit) $ 7,908 $ (8,304) Add back: dilutive effect of earnings allocated to participating securities and contingently issuable shares (96) 7 Net Income attributable to SLGOP common unitholders (numerator for diluted earnings per unit) $ 7,812 $ (8,297) Three Months Ended March 31, Denominator 2022 2021 Basic units: Weighted average common units outstanding 68,470 71,109 Effect of Dilutive Securities: Stock-based compensation plans 984 588 Contingently issuable units 774 307 Diluted weighted average common units outstanding 70,228 72,004 The Operating Partnership has excluded 351,927 and 1,124,920 common unit equivalents from the diluted units outstanding for the three months ended March 31, 2022 and 2021, respectively, as they were anti-dilutive. The following tables set forth the changes in accumulated other comprehensive loss by component as of March 31, 2022 (in thousands): Net unrealized gain (loss) on derivative instruments ( 1 ) SL Green’s share of joint venture net unrealized loss on derivative instruments ( 2 ) Net unrealized (loss) gain on marketable securities Total Balance at December 31, 2021 $ (25,881) $ (21,994) $ 1,117 $ (46,758) Other comprehensive gain before reclassifications 26,790 9,785 (1,691) 34,884 Amounts reclassified from accumulated other comprehensive loss 3,649 964 — 4,613 Balance at March 31, 2022 $ 4,558 $ (11,245) $ (574) $ (7,261) (1) Amount reclassified from accumulated other comprehensive loss is included in interest expense in the respective consolidated statements of operations. As of March 31, 2022 and December 31, 2021, the deferred net gains from these terminated hedges, which is included in accumulated other comprehensive loss relating to net unrealized loss on derivative instruments, was $(0.6) million and $(0.6) million, respectively. (2) Amount reclassified from accumulated other comprehensive loss is included in equity in net loss from unconsolidated joint ventures in the respective consolidated statements of operations.

Fair Value Measurements

Fair Value Measurements	3 Months Ended
	Mar. 31, 2022
Fair Value Disclosures [Abstract]
Fair Value Measurements	Fair Value Measurements We are required to disclose fair value information with regard to certain of our financial instruments, whether or not recognized in the consolidated balance sheets, for which it is practical to estimate fair value. The 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 certain 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 consists 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. Our 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 as of March 31, 2022 and December 31, 2021 (in thousands): March 31, 2022 Total Level 1 Level 2 Level 3 Assets: Marketable securities available-for-sale $ 22,353 $ — $ 22,353 $ — Interest rate cap and swap agreements (included in Other assets) 10,052 — 10,052 — Liabilities: Interest rate cap and swap agreements (included in Other liabilities) $ 5,795 $ — $ 5,795 $ — December 31, 2021 Total Level 1 Level 2 Level 3 Assets: Marketable securities available-for-sale $ 24,146 $ — $ 24,146 $ — Interest rate cap and swap agreements (included in Other assets) 1,896 — 1,896 — Liabilities: Interest rate cap and swap agreements (included in Other liabilities) $ 29,912 $ — $ 29,912 $ — We evaluate real estate investments and debt and preferred equity investments, including intangibles, for potential impairment primarily utilizing cash flow projections that apply, among other things, estimated revenue and expense growth rates, discount rates and capitalization rates, as well as sales comparison approach, which utilizes comparable sales, listings and sales contracts, all of which are classified as Level 3 inputs. Marketable securities classified as Level 1 are derived from quoted prices in active markets. The valuation technique used to measure the fair value of marketable securities classified as Level 2 were valued based on quoted market prices or model driven valuations using the significant inputs derived from or corroborated by observable market data. We do not intend to sell these securities and it is not more likely than not that we will be required to sell the investments before recovery of their amortized cost bases. 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, 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 instrument 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 March 31, 2022 and December 31, 2021 (in thousands): March 31, 2022 December 31, 2021 Carrying Value (1) Fair Value Carrying Value (1) Fair Value Debt and preferred equity investments $ 1,107,870 (2) $ 1,088,723 (2) Fixed rate debt $ 3,321,239 $ 3,322,000 $ 3,274,324 $ 3,336,463 Variable rate debt 813,478 813,040 801,051 800,672 $ 4,134,717 $ 4,135,040 $ 4,075,375 $ 4,137,135 (1) Amounts exclude net deferred financing costs. (2) As of March 31, 2022, debt and preferred equity investments had an estimated fair value ranging between $1.0 billion and $1.1 billion. As of December 31, 2021, debt and preferred equity investments had an estimated fair value ranging between $1.0 billion and $1.1 billion. Disclosures regarding fair value of financial instruments was based on pertinent information available to us as of March 31, 2022 and December 31, 2021. 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	3 Months Ended
	Mar. 31, 2022
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, collars 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. We recognize all derivatives on the balance sheet at fair value. Derivatives that are not hedges are adjusted to fair value through earnings. If a derivative is a hedge, depending on the nature of the hedge, changes in the fair value of the derivative will either be offset against the change in fair value of the hedge asset, liability, or firm commitment through earnings, or recognized in other comprehensive income (loss) until the hedged item is recognized in earnings. Reported net income and equity may increase or decrease prospectively, depending on future levels of interest rates and other variables affecting the fair values of derivative instruments and hedged items, but will have no effect on cash flows. Currently, all of our designated derivative instruments are effective hedging instruments. The following table summarizes the notional value at inception and fair value of our consolidated derivative financial instruments as of March 31, 2022 based on Level 2 information. 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 (dollars in thousands). Notional Strike Effective Expiration Balance Sheet Location Fair Interest Rate Cap $ 111,869 3.500 % November 2021 November 2022 Other Assets $ 9 Interest Rate Swap 100,000 0.212 % January 2021 January 2023 Other Assets 1,223 Interest Rate Swap 400,000 0.184 % January 2022 February 2023 Other Assets 4,838 Interest Rate Swap 50,000 0.633 % February 2022 February 2023 Other Assets 373 Interest Rate Swap 100,000 1.163 % November 2021 July 2023 Other Assets 1,177 Interest Rate Swap 200,000 1.133 % November 2021 July 2023 Other Assets 2,432 Interest Rate Swap 150,000 2.700 % December 2021 January 2024 Other Liabilities (1,153) Interest Rate Swap 150,000 2.721 % December 2021 January 2026 Other Liabilities (1,865) Interest Rate Swap 200,000 2.762 % December 2021 January 2026 Other Liabilities (2,777) $ 4,257 No gains or losses on the changes in the fair values were included in interest expense in the consolidated statements of operations during the three months ended March 31, 2022 or 2021. The Company has agreements with each of its derivative counterparties that contain a provision where if the Company defaults on any of its indebtedness, then the Company could also be declared in default on its derivative obligations. As of March 31, 2022, the fair value of derivatives in a net liability position, including accrued interest but excluding any adjustment for nonperformance risk related to these agreements was $6.8 million. As of March 31, 2022, the Company was not required to post any collateral related to these agreements and was not in breach of any agreement provisions. If the Company had breached any of these provisions, it could have been required to settle its obligations under the agreements at their aggregate termination value of $7.0 million as of March 31, 2022. Gains and losses on terminated hedges are included in accumulated other comprehensive income (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 $(3.7) million of the current balance held in accumulated other comprehensive loss will be reclassified into interest expense and $1.3 million of the portion related to our share of joint venture accumulated other comprehensive loss will be reclassified into equity in net loss 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 operations for the three months ended March 31, 2022 and 2021, respectively (in thousands): Amount of Gain Location of Loss Reclassified from Accumulated Other Comprehensive Loss into Income Amount of Loss Reclassified from Three Months Ended March 31, Three Months Ended March 31, Derivative 2022 2021 2022 2021 Interest Rate Swaps/Caps $ 28,378 $ 10,220 Interest expense $ (3,866) $ (4,388) Share of unconsolidated joint ventures' derivative instruments 10,308 34,955 Equity in net loss from unconsolidated joint ventures (1,015) (1,700) $ 38,686 $ 45,175 $ (4,881) $ (6,088) The following table summarizes the notional value at inception and fair value of our joint ventures' derivative financial instruments as of March 31, 2022 based on Level 2 information. 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 (dollars in thousands). Notional Strike Effective Expiration Classification Fair Interest Rate Cap $ 1,075,000 2.850 % September 2021 September 2022 Asset $ 21 Interest Rate Cap 125,000 2.850 % September 2021 September 2022 Asset 2 Interest Rate Cap 23,000 4.750 % January 2021 January 2023 Asset 2 Interest Rate Cap 220,000 4.000 % February 2022 February 2023 Asset 68 Interest Rate Cap 510,000 3.000 % December 2021 June 2023 Asset 1,297 Interest Rate Cap 237,340 0.550 % February 2022 May 2024 Asset 14,994 Interest Rate Cap 118,670 0.550 % February 2022 May 2024 Asset 14,977 Interest Rate Swap 177,000 1.669 % March 2016 February 2026 Asset 5,014 $ 36,375

Lease Income

Lease Income	3 Months Ended
	Mar. 31, 2022
Leases [Abstract]
Lease Income	Lease Income The Operating Partnership is the lessor and the sublessor to tenants under operating and sales-type leases. The minimum rental amounts due under the leases are generally 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. The components of lease income from operating leases during the three months ended March 31, 2022 and 2021 were as follows (in thousands): Three Months Ended March 31, 2022 2021 Fixed lease payments $ 136,581 $ 164,679 Variable lease payments 19,555 25,279 Total lease payments (1) $ 156,136 $ 189,958 Amortization of acquired above and below-market leases (105) (1,869) Total rental revenue $ 156,031 $ 188,089 (1) Amounts include $56.2 million and $65.8 million of sublease income during the three months ended March 31, 2022 and 2021, respectively. The components of lease income from sales-type leases during the three months ended March 31, 2022 and 2021 were as follows (in thousands): Three Months Ended March 31, 2022 2021 Interest income (1) $ 1,092 $ 1,101 (1) These amounts are included in Other income in our consolidated statements of operations.

Commitments and Contingencies

Commitments and Contingencies	3 Months Ended
	Mar. 31, 2022
Commitments and Contingencies Disclosure [Abstract]
Commitments and Contingencies	Commitments and Contingencies Legal Proceedings As of March 31, 2022, the Company and the Operating Partnership were not involved in any material litigation nor, to management's knowledge, was any material litigation threatened against us or our portfolio which if adversely determined could have a material adverse impact on us. In September 2021, the Company acquired the fee position in 1591-1597 Broadway. The property was conveyed by the Company to a third party in May 2022, in connection with a settlement. On October 31, 2021, HNA, through an affiliated entity, filed for Chapter 11 bankruptcy protection on account of its investment in 245 Park Avenue, together with another asset in Chicago. The Company contested the filing, on the basis that the filing was done in bad faith and in violation of HNA's agreements with the Company, and is currently appealing the Bankruptcy court’s ruling upholding the filing by HNA. See Note 5, "Debt and Preferred Equity Investments." 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.

Segment Information

Segment Information	3 Months Ended
	Mar. 31, 2022
Segment Reporting [Abstract]
Segment Information	Segment Information The Company has two reportable segments, real estate and debt and preferred equity investments. We evaluate real estate performance and allocate resources based on earnings contributions. The primary sources of revenue are generated from tenant rents, escalations and reimbursement revenue. Real estate property operating expenses consist primarily of security, maintenance, utility costs, insurance, 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 consolidated results of operations for the three months ended March 31, 2022 and 2021, and selected asset information as of March 31, 2022 and December 31, 2021, regarding our operating segments are as follows (in thousands): Real Estate Segment Debt and Preferred Equity Segment Total Company Total revenues Three months ended: March 31, 2022 $ 168,076 $ 19,888 $ 187,964 March 31, 2021 206,829 19,273 226,102 Net income (loss) Three months ended: March 31, 2022 $ (3,482) $ 16,967 $ 13,485 March 31, 2021 (20,027) 16,172 (3,855) Total assets As of: March 31, 2022 $ 9,902,557 $ 1,112,408 $ 11,014,965 December 31, 2021 9,974,140 1,092,489 11,066,629 Interest costs for the debt and preferred equity segment include actual costs incurred for borrowings on the 2017 MRA. Interest is imputed on the investments that do not collateralize the 2017 MRA using our weighted average corporate borrowing cost. We also allocate loan loss reserves, net of recoveries, and transaction related costs to the debt and preferred equity segment. We do not allocate marketing, general and administrative expenses to the debt and preferred equity segment because the use of personnel and resources is dependent on transaction volume between the two segments and varies between periods. In addition, we base performance on the individual segments prior to allocating marketing, general and administrative expenses. For the three months ended March 31, 2022, marketing, general and administrative expenses totaled $24.8 million. For the three months ended March 31, 2021, marketing, general and administrative expenses totaled $22.9 million. All other expenses, except interest, relate entirely to the real estate assets. There were no transactions between the above two segments.

Significant Accounting Polici_2

Significant Accounting Policies (Policies)	3 Months Ended
	Mar. 31, 2022
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. 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 VIE in which we are considered the 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.
Investment in Commercial Real Estate Properties	Investment in Commercial Real Estate Properties 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) over their estimated useful lives, which generally range from 3 years to 40 years. We amortize the amount allocated to the above- and below-market leases over the remaining term of the associated lease, which generally range from 1 year to 15 years, and record it as either an increase (in the case of below-market leases) or a decrease (in the case of above-market leases) to rental income. We amortize the amount allocated to the values associated with in-place leases over the expected term of the associated lease, which generally ranges from 1 year to 15 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 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. The Company classifies those leases under which the Company is the lessee at lease commencement as finance or operating leases. Leases qualify as finance leases if the lease transfers ownership of the asset at the end of the lease term, the lease grants an option to purchase the asset that we are reasonably certain to exercise, the lease term is for a major part of the remaining economic life of the asset, or the present value of the lease payments exceeds substantially all of the fair value of the asset. Leases that do not qualify as finance leases are deemed to be operating leases. At lease commencement the Company records a lease liability which is measured as the present value of the lease payments and a right of use asset which is measured as the amount of the lease liability and any initial direct costs incurred. The Company applies a discount rate to determine the present value of the lease payments. If the rate implicit in the lease is known, the Company uses that rate. If the rate implicit in the lease is not known, the Company uses a discount rate reflective of the Company’s collateralized borrowing rate given the term of the lease. To determine the discount rate, the Company employs a third party specialist to develop an analysis based primarily on the observable borrowing rates of the Company, other REITs, and other corporate borrowers with long-term borrowings. On the consolidated statements of operations, operating leases are expensed through operating lease rent while financing leases are expensed through amortization and interest expense. When applicable, the Company combines the consideration for lease and non-lease components in the calculation of the value of the lease obligation and right-of-use asset.
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.
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.
Investment in Marketable Securities	Investment in Marketable Securities At acquisition, we designate a debt security as held-to-maturity, available-for-sale, or trading. As of March 31, 2022, we did not have any debt securities designated as held-to-maturity or trading. We account for our available-for-sale securities at fair value pursuant to ASC 820-10, with the net unrealized gains or losses reported as a component of accumulated other comprehensive income or loss. The cost of marketable securities sold and the amount reclassified out of accumulated other comprehensive income into earnings is determined using the specific identification method. Credit losses are recognized in accordance with ASC 326. We account for our equity marketable securities at fair value pursuant to ASC 820-10, with the net unrealized gains or losses reported in net income.
Investments in Unconsolidated Joint Ventures	Investments in Unconsolidated Joint VenturesWe 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 each joint ventures' actual and projected cash flows.
Deferred Lease Costs and Lease Classification	Deferred Lease Costs Deferred lease costs consist of incremental fees and direct costs that would not have been incurred if the lease had not been obtained and are amortized on a straight-line basis over the related lease term. Lease Classification Lease classification for leases under which the Company is the lessor is evaluated at lease commencement and leases not classified as sales-type leases or direct financing leases are classified as operating leases. Leases qualify as sales-type leases if the contract includes either transfer of ownership clauses, certain purchase options, a lease term representing a major part of the economic life of the asset, or the present value of the lease payments and residual guarantees provided by the lessee exceeds substantially all of the fair value of the asset. Additionally, leasing an asset so specialized that it is not deemed to have any value to the Company at the end of the lease term may also result in classification as a sales-type lease. Leases qualify as direct financing leases when the present value of the lease payments and residual value guarantees provided by the lessee and unrelated third parties exceeds substantially all of the fair value of the asset and collection of the payments is probable.
Revenue Recognition	Revenue Recognition Rental revenue for operating leases is recognized on a straight-line basis over the term of the lease. Rental revenue recognition commences when the leased space is available for its intended use by the lessee. To determine whether the leased space is available for its intended use by the lessee, management evaluates whether we or the tenant are 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 of tenant improvements, rental revenue recognition begins when the tenant takes possession of or controls the space. 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. In addition to base rent, our tenants also generally will pay variable rent, which represents their pro rata share of increases in real estate taxes and certain operating expenses for the building over a base year. In some leases, in lieu of paying additional rent based upon increases in certain 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. Rental revenue is recognized if collectability is probable. If collectability of substantially all of the lease payments is assessed as not probable, any difference between the rental revenue recognized to date and the lease payments that have been collected is recognized as a current-period adjustment to rental revenue. A subsequent change in the assessment of collectability to probable may result in a current-period adjustment to rental revenue for any difference between the rental revenue that would have been recognized if collectability had always been assessed as probable and the rental revenue recognized to date. The Company provides its tenants with certain customary services for lease contracts such as common area maintenance and general security. We have elected to combine the non-lease components with the lease components of our operating lease agreements and account for them as a single lease component in accordance with ASC 842. We record a gain or loss on sale of real estate assets when we no longer have a controlling financial interest in the entity owning the real estate, a contract exists with a third party and that third party has control of the assets acquired. Investment income on debt and preferred equity investments is accrued based on the contractual terms of the instruments and when it is deemed collectible. Some 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 is collectible. If management cannot make this determination, interest income above the current pay rate is recognized only upon actual receipt. Deferred origination fees, original issue discounts and loan origination costs, if any, are recognized as an adjustment to interest income over the terms of the related investments using the effective interest method. Fees received in connection with loan commitments are also deferred until the loan is funded and are then recognized over the term of the loan as an adjustment to yield. Discounts or premiums associated with the purchase of loans are amortized or accreted into interest income as a yield adjustment on the effective interest method based on expected cash flows through the expected maturity date of the related investment. 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. For debt investments acquired at a discount for credit quality, the difference between contractual cash flows and expected cash flows at acquisition is not accreted. Anticipated exit fees, the collection of which is expected, are also recognized over the term of the loan as an adjustment to yield. We consider a debt and preferred equity investment to be past due when amounts contractually due have not been paid. Debt and preferred equity investments are placed on a non-accrual status 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 on any debt or preferred equity investment that is on non-accrual status when such debt or preferred equity investment becomes contractually current and performance is demonstrated to be resumed. We may syndicate a portion of the loans that we originate or sell the loans individually. When a transaction meets the criteria for sale accounting, we recognize gain or loss based on the difference between the sales price and the carrying value of the loan sold. Any related unamortized deferred origination fees, original issue discounts, loan origination costs, discounts or premiums at the time of sale are recognized as an adjustment to the gain or loss on sale, which is included in investment income on the consolidated statement of operations. Any fees received at the time of sale or syndication are recognized as part of investment income. Asset management fees are recognized on a straight-line basis over the term of the asset management agreement.
Debt and Preferred Equity Investments	Debt and Preferred Equity Investments Debt and preferred equity investments are presented at the net amount expected to be collected in accordance with ASC 326. An allowance for loan losses is deducted from the amortized cost basis of the financial assets to present the net carrying value at the amount expected to be collected through the expected maturity date of such investments. The expense for loan loss and other investment reserves is the charge to earnings to adjust the allowance for loan losses to the appropriate level. Amounts are written off from the allowance when we de-recognize the related investment either as a result of a sale of the investment or acquisition of equity interests in the collateral. The Company evaluates the amount expected to be collected based on current market and economic conditions, historical loss information, and reasonable and supportable forecasts. The Company's assumptions are derived from both internal data and external data which may include, among others, governmental economic projections for the New York City Metropolitan area, public data on recent transactions and filings for securitized debt instruments. This information is aggregated by asset class and adjusted for duration. Based on these inputs, loans are evaluated at the individual asset level. In certain instances, we may also use a probability-weighted model that considers the likelihood of multiple outcomes and the amount expected to be collected for each outcome. The evaluation of the possible credit deterioration associated with the performance and/or value of the underlying collateral property as well as the financial and operating capability of the borrower/sponsor requires significant judgment, which include both asset level and market assumptions over the relevant time period. In addition, quarterly, the Company assigns each loan a risk rating. Based on a 3-point scale, loans are rated “1” through “3,” from lower risk to higher risk, which ratings are defined as follows: 1 - Low Risk Assets - Low probability of loss, 2 - Watch List Assets - Higher potential for loss, 3 - High Risk Assets - Loss more likely than not. Loans with risk ratings of 2 or above are evaluated to determine whether the expected risk of loss is appropriately captured through the combination of our expectations of current conditions, historical loss information and supportable forecasts described above or whether risk characteristics specific to the loan warrant the use of a probability-weighted model. Financing investments that are classified as held for sale are carried at the expected amount to be collected 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 expected amount to be collected. Other financing receivables that are included in balance sheet line items other than the Debt and preferred equity investments line are also measured at the net amount expected to be collected. Accrued interest receivable amounts related to these debt and preferred equity investment and other financing receivables are recorded at the net amount expected to be collected within Other assets in the consolidated balance sheets. Accrued interest receivables that are written off are recognized as an expense in loan loss and other investment reserves.
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, SL Green will be subject to Federal income tax on its 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 its 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 operations relates to the Operating Partnership’s consolidated taxable REIT subsidiaries. The Operating Partnership may also be subject to certain state, local and franchise taxes. We have elected, and may elect in the future, to treat certain of our corporate subsidiaries as taxable REIT subsidiaries, or TRSs. In general, TRSs 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 TRSs generate income, resulting in Federal and state income tax liability for these entities. We recorded Federal, state and local tax provisions totaling $0.9 million and $0.7 million during the three months ended March 31, 2022 and 2021, respectively. 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.
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.
Concentrations 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 with high quality financial institutions. The collateral securing our debt and preferred equity investments is located in New York City. See Note 5, "Debt and Preferred Equity Investments."
Reclassification	Reclassification Certain prior year balances have been reclassified to conform to our current year presentation.
Accounting Standards Updates	Accounting Standards Updates In March 2022, the FASB issued ASU No. 2022-02 Financial Instruments - Credit Losses (Topic 326) Troubled Debt Restructurings and Vintage Disclosures. ASU 2022-02 eliminates the troubled debt restructuring recognition and measurement guidance and, instead, requires that an entity evaluate whether the modification represents a new loan or a continuation of an existing loan. The amendments enhance existing disclosure requirements and introduce new requirements related to certain modifications of receivables made to borrowers experiencing financial difficulties. Additionally, ASU 2022-02 requires an entity to disclose current-period gross write-offs by year of origination for financing receivables and net investment in leases within the scope of Subtopic 326-20. Gross write-off information must be included in the vintage disclosures required for entities in accordance with Subtopic 326-20, which requires that an entity disclose the amortized cost basis of financing receivables by credit-quality indicator and class of financing receivable by year of origination. ASU 2022-02 is effective for reporting periods beginning after December 15, 2022, including interim periods within those fiscal years, with early adoption permitted. We are currently evaluating the impact of the adoption of ASU 2022-02 on our consolidated financial statements, but do not believe the adoption of this standard will have a material impact on our consolidated financial statements. In July 2021, the FASB issued ASU No. 2021-05 Leases (Topic 842) Lessors - Certain Leases with Variable Lease Payments. ASU 2021-05 amends the lease classification requirements for lessors when classifying and accounting for a lease with variable lease payments that do not depend on a reference rate index or a rate. The update provides criteria, that if met, the lease would be classified and accounted for as an operating lease. ASU 2021-05 is effective for reporting periods beginning after December 15, 2021. The Company adopted this guidance on January 1, 2022 and it did not have a material impact on the Company's consolidated financial statements. In August 2020, the FASB issued Accounting Standard Update, or "ASU," No. 2020-06 Debt - Debt with Conversion and Other Options (Subtopic 470-20) and Derivatives and Hedging - Contracts in Entity's Own Equity (Subtopic 815-40). ASU 2020-06 simplifies the accounting for convertible instruments by reducing the number of accounting models for convertible debt instruments and convertible preferred stock, removes certain settlement conditions that are required for equity contracts to qualify for the derivative scope exception and also simplifies the diluted earnings per share calculation in certain areas. ASU 2020-06 is effective for reporting periods beginning after December 15, 2021. The Company adopted this guidance on January 1, 2022 and it did not have a material impact on the Company's consolidated financial statements.
Fair Value Measurements	Fair Value MeasurementsWe are required to disclose fair value information with regard to certain of our financial instruments, whether or not recognized in the consolidated balance sheets, for which it is practical to estimate fair value. The 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 certain 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 consists 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. Our 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. We evaluate real estate investments and debt and preferred equity investments, including intangibles, for potential impairment primarily utilizing cash flow projections that apply, among other things, estimated revenue and expense growth rates, discount rates and capitalization rates, as well as sales comparison approach, which utilizes comparable sales, listings and sales contracts, all of which are classified as Level 3 inputs. Marketable securities classified as Level 1 are derived from quoted prices in active markets. The valuation technique used to measure the fair value of marketable securities classified as Level 2 were valued based on quoted market prices or model driven valuations using the significant inputs derived from or corroborated by observable market data. We do not intend to sell these securities and it is not more likely than not that we will be required to sell the investments before recovery of their amortized cost bases. 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.

Organization and Basis of Pre_2

Organization and Basis of Presentation (Tables)	3 Months Ended
	Mar. 31, 2022
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Schedule of commercial office properties	As of March 31, 2022, we owned the following interests in properties in the New York metropolitan area, primarily in midtown Manhattan. Our investments located outside of Manhattan are referred to as the Suburban properties: Consolidated Unconsolidated Total Location Property Number of Buildings Approximate Square Feet (unaudited) Number of Buildings Approximate Square Feet (unaudited) Number of Buildings Approximate Square Feet (unaudited) Weighted Average Occupancy (1) (unaudited) Commercial: Manhattan Office 12 8,180,345 11 13,661,381 23 21,841,726 91.5 % Retail 2 (2) 17,888 9 301,996 11 319,884 91.2 % Development/Redevelopment (1) 6 2,230,282 2 1,618,310 8 3,848,592 N/A Fee Interest 1 7,684 — — 1 7,684 N/A 21 10,436,199 22 15,581,687 43 26,017,886 91.5 % Suburban Office 7 862,800 — — 7 862,800 78.6 % Total commercial properties 28 11,298,999 22 15,581,687 50 26,880,686 91.0 % Residential: Manhattan Residential 2 (2) 222,632 6 445,934 8 668,566 87.9 % Total portfolio 30 11,521,631 28 16,027,621 58 27,549,252 91.0 % (1) The weighted average occupancy for commercial properties represents the total occupied square footage divided by the total square footage at acquisition. The weighted average occupancy for residential properties represents the total occupied units divided by the total available units. Properties under construction are not included in the calculation of weighted average occupancy. (2) As of March 31, 2022, we owned a building at 7 Dey / 185 Broadway that was comprised of approximately 50,206 square feet (unaudited) of retail space and approximately 140,382 square feet (unaudited) of residential space. For the purpose of this report, we have included this building in the number of retail properties we own. However, we have included only the retail square footage in the retail approximate square footage, and have listed the balance of the square footage as residential square footage.

Significant Accounting Polici_3

Significant Accounting Policies (Tables)	3 Months Ended
	Mar. 31, 2022
Accounting Policies [Abstract]
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 March 31, 2022 and December 31, 2021 (in thousands): March 31, 2022 December 31, 2021 Identified intangible assets (included in other assets): Gross amount $ 199,722 $ 199,722 Accumulated amortization (184,129) (182,643) Net (1) $ 15,593 $ 17,079 Identified intangible liabilities (included in deferred revenue): Gross amount $ 212,767 $ 212,767 Accumulated amortization (210,454) (210,262) Net (1) $ 2,313 $ 2,505
Schedule of marketable securities	As of March 31, 2022 and December 31, 2021, we held the following marketable securities (in thousands): March 31, 2022 December 31, 2021 Commercial mortgage-backed securities $ 22,353 $ 24,146 Total marketable securities available-for-sale $ 22,353 $ 24,146 Equity marketable securities $ 10,536 $ 10,606 Total investment in marketable securities $ 32,889 $ 34,752
Schedules of concentration of risk, by risk factor	For the three months ended March 31, 2022, the following properties contributed more than 5.0% of our annualized cash rent from office properties, including our share of annualized cash rent from joint venture office properties: Property Three months ended March 31, 2022 One Vanderbilt Avenue 14.3% 11 Madison Avenue 9.3% 420 Lexington Ave 7.0% 1185 Avenue of the Americas 7.0% 1515 Broadway 6.9% 280 Park Avenue 5.8%

Properties Held for Sale and _2

Properties Held for Sale and Property Dispositions (Tables)	3 Months Ended
	Mar. 31, 2022
Discontinued Operations and Disposal Groups [Abstract]
Summary of properties sold	The following table summarizes the properties disposed of during the three months ended March 31, 2022: Property Disposition Date Property Type Approximate Square Feet Sales Price (in millions) Gain (Loss) (in millions) 707 Eleventh Avenue February 2022 Fee Interest 159,720 $ 95.0 $ (0.8)

Debt and Preferred Equity Inv_2

Debt and Preferred Equity Investments (Tables)	3 Months Ended
	Mar. 31, 2022
Investments, Debt and Equity Securities [Abstract]
Schedule of debt and preferred equity book balance roll forward	Below is a summary of the activity in our debt and preferred equity investments for the three months ended March 31, 2022 and the twelve months ended December 31, 2021 (in thousands): March 31, 2022 December 31, 2021 Balance at beginning of year (1) $ 1,088,723 $ 1,076,542 Debt investment originations/fundings/accretion (2) 16,615 193,824 Preferred equity investment originations/accretion (2) 8,937 13,220 Redemptions/sales/syndications/equity ownership/amortization (3) (6,405) (201,446) Net change in loan loss reserves — 6,583 Balance at end of period (1) $ 1,107,870 $ 1,088,723 (1) Net of unamortized fees, discounts, and premiums. (2) Accretion includes amortization of fees and discounts and paid-in-kind investment income. (3) Certain participations in debt investments that were sold or syndicated, but did not meet the conditions for sale accounting, are included in Other assets and Other liabilities on the consolidated balance sheets.
Schedule of debt	Below is a summary of our debt and preferred equity investments as of March 31, 2022 (dollars in thousands): Floating Rate Fixed Rate Total Carrying Value Senior Financing Weighted Average Yield at End of Period Maturity (1) Type Carrying Value Face Value Interest Rate Carrying Value Face Value Interest Rate Senior Mortgage Debt $ 26,088 $ 26,233 L + 3.50% $ 73,000 $ 73,000 3.00% $ 99,088 $ — 4.25% 2022 - 2023 Mezzanine Debt 276,040 276,670 L + 4.95% - 12.57% 450,799 459,865 2.90% - 14.30% 726,839 4,700,426 6.98% 2022 - 2029 Preferred Equity — — — 281,943 282,403 6.50% - 11.00% 281,943 1,962,750 9.64% 2022 - 2027 Balance at end of period $ 302,128 $ 302,903 $ 805,742 $ 815,268 $ 1,107,870 $ 6,663,176 (1) Excludes available extension options to the extent they have not been exercised as of the date of this filing.
Allowance for credit losses on financing receivables	The following table is a roll forward of our total allowance for loan losses for the three months ended March 31, 2022 and the twelve months ended December 31, 2021 (in thousands): March 31, 2022 December 31, 2021 Balance at beginning of year $ 6,630 $ 13,213 Write-offs charged against the allowance — (6,583) Balance at end of period (1) $ 6,630 $ 6,630 (1) As of March 31, 2022, all financing receivables on non-accrual had an allowance for loan loss except for one debt investment with a carrying value of $225.4 million.
Schedule of investment in financing receivables and risk rating	The following table sets forth the carrying value of our debt and preferred equity investment portfolio by risk rating as of March 31, 2022 and December 31, 2021 (dollars in thousands): Risk Rating March 31, 2022 December 31, 2021 1 - Low Risk Assets - Low probability of loss $ 517,330 $ 644,489 2 - Watch List Assets - Higher potential for loss 583,650 437,344 3 - High Risk Assets - Loss more likely than not 6,890 6,890 $ 1,107,870 $ 1,088,723 The following table sets forth the carrying value of our debt and preferred equity investment portfolio by year of origination and risk rating as of March 31, 2022 (dollars in thousands): As of March 31, 2022 Risk Rating 2022 (1) 2021 (1) 2020 (1) Prior (1) Total 1 - Low Risk Assets - Low probability of loss $ — $ 142,264 $ 153,055 $ 222,011 $ 517,330 2 - Watch List Assets - Higher potential for loss — — 135,157 448,493 583,650 3 - High Risk Assets - Loss more likely than not — — — 6,890 6,890 $ — $ 142,264 $ 288,212 $ 677,394 $ 1,107,870 (1) Year in which the investment was originated or acquired by us or in which a material modification occurred.
Summary of debt investments	As of March 31, 2022 and December 31, 2021, we held the following debt investments with an aggregate weighted average current yield of 6.65% as of March 31, 2022 (dollars in thousands): Loan Type March 31, 2022 March 31, 2022 Senior March 31, 2022 Carrying Value (1) December 31, 2021 (1) Maturity (2) Fixed Rate Investments: Mezzanine Loan $ — $ 280,000 $ 44,182 $ 43,521 August 2022 Mortgage Loan — — 73,000 73,000 April 2023 Mezzanine Loan (3) — 382,473 225,367 225,367 June 2023 Mezzanine Loan — 276,885 69,264 66,873 June 2023 Mezzanine Loan (4a)(5) — 105,000 13,366 13,366 June 2024 Mezzanine Loan — 95,000 30,000 30,000 January 2025 Mezzanine Loan (6) — 1,712,750 55,250 55,250 June 2027 Mezzanine Loan — 85,000 20,000 20,000 December 2029 Total fixed rate $ — $ 2,937,108 $ 530,429 $ 527,377 Floating Rate Investments: Mezzanine Loan $ — $ 275,000 $ 49,999 $ 49,998 April 2023 Mezzanine Loan 4,624 181,536 37,824 37,511 July 2022 Mezzanine Loan (4b)(7) — 1,115,000 135,157 133,735 April 2022 Mezzanine Loan 3,761 54,000 8,238 8,050 May 2022 Mortgage and Mezzanine Loan 18,142 — 40,161 34,874 December 2022 Mezzanine Loan 33,685 137,783 30,749 30,802 May 2023 Total floating rate $ 60,212 $ 1,763,319 $ 302,128 $ 294,970 Allowance for loan loss — — (6,630) (6,630) Total $ 60,212 $ 4,700,427 $ 825,927 $ 815,717 (1) Carrying value is net of discounts, premiums, original issue discounts and deferred origination fees. (2) Represents contractual maturity, excluding any extension options to the extent they have not been exercised as of the date of this filing. (3) This loan was put on non-accrual in July 2020 and remains on non-accrual as of March 31, 2022. No investment income has been recognized subsequent to it being put on non-accrual. The Company is in discussions with the borrower. (4) Carrying value is net of the following amounts that were sold or syndicated, which are included in Other assets and Other liabilities on the consolidated balance sheets as a result of the transfers not meeting the conditions for sale accounting: (a) $12.0 million, and (b) $0.4 million. (5) This loan went into default and was put on non-accrual in June 2020 and remains on non-accrual as of March 31, 2022. No investment income has been recognized subsequent to it being put on non-accrual. The Company is in discussions with the borrower. Additionally, we determined the borrower entity to be a VIE, in which we are not the primary beneficiary. (6) The borrower under this mezzanine loan is an entity affiliated with HNA, which owns an equity interest in 245 Park Avenue. The borrower filed for bankruptcy protection on October 31, 2021, which the Company contested. (7) In the second quarter of 2022, this loan was extended for two months to May 2022.
Summary of preferred equity investments	As of March 31, 2022 and December 31, 2021, we held the following preferred equity investments with an aggregate weighted average current yield of 9.64% as of March 31, 2022 (dollars in thousands): Type March 31, 2022 March 31, 2022 Senior March 31, 2022 Carrying Value (1) December 31, 2021 (1) Mandatory Redemption (2) Preferred Equity (3) $ — $ 1,712,750 $ 167,875 $ 160,772 June 2022 Preferred Equity — 250,000 114,068 112,234 February 2027 Total Preferred Equity $ — $ 1,962,750 $ 281,943 $ 273,006 Allowance for loan loss — — — — Total $ — $ 1,962,750 $ 281,943 $ 273,006 (1) Carrying value is net of deferred origination fees. (2) Represents contractual redemption, excluding any unexercised extension options. (3) On October 31, 2021, HNA, through an affiliated entity, filed for Chapter 11 bankruptcy protection on account of its investment in 245 Park Avenue, together with another asset in Chicago. The Company contested the filing, on the basis that the filing was done in bad faith and in violation of HNA's agreements with the Company, and is currently appealing the Bankruptcy court's ruling upholding the filing by HNA.

Investments in Unconsolidated_2

Investments in Unconsolidated Joint Ventures (Tables)	3 Months Ended
	Mar. 31, 2022
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 March 31, 2022: Property Partner Ownership (1) Economic (1) Unaudited Approximate Square Feet 100 Park Avenue Prudential Real Estate Investors 49.90% 49.90% 834,000 717 Fifth Avenue Wharton Properties/Private Investor 10.92% 10.92% 119,500 800 Third Avenue Private Investors 60.52% 60.52% 526,000 919 Third Avenue New York State Teacher's Retirement System 51.00% 51.00% 1,454,000 11 West 34th Street Private Investor/Wharton Properties 30.00% 30.00% 17,150 280 Park Avenue Vornado Realty Trust 50.00% 50.00% 1,219,158 1552-1560 Broadway (2) Wharton Properties 50.00% 50.00% 57,718 10 East 53rd Street Canadian Pension Plan Investment Board 55.00% 55.00% 354,300 21 East 66th Street (3) Private Investors 32.28% 32.28% 13,069 650 Fifth Avenue (4) Wharton Properties 50.00% 50.00% 69,214 121 Greene Street Wharton Properties 50.00% 50.00% 7,131 Stonehenge Portfolio (5) Various Various Various 1,439,016 11 Madison Avenue PGIM Real Estate 60.00% 60.00% 2,314,000 One Vanderbilt Avenue National Pension Service of Korea/Hines Interest LP 71.01% 71.01% 1,657,198 Worldwide Plaza RXR Realty / New York REIT 24.95% 24.95% 2,048,725 1515 Broadway Allianz Real Estate of America 56.87% 56.87% 1,750,000 2 Herald Square Israeli Institutional Investor 51.00% 51.00% 369,000 115 Spring Street Private Investor 51.00% 51.00% 5,218 15 Beekman (6) A fund managed by Meritz Alternative Investment Management 20.00% 20.00% 221,884 85 Fifth Avenue Wells Fargo 36.27% 36.27% 12,946 One Madison Avenue (7) National Pension Service of Korea/Hines Interest LP/International Investor 25.50% 25.50% 1,048,700 220 East 42nd Street A fund managed by Meritz Alternative Investment Management 51.00% 51.00% 1,135,000 (1) Ownership interest and economic interest represent the Company's interests in the joint venture as of March 31, 2022. Changes in ownership or economic interests within the current year are disclosed in the notes below. (2) The joint venture also owns a long-term leasehold interest in the retail space and certain other spaces at 1560 Broadway, which is adjacent to 1552 Broadway. (3) We hold a 32.28% interest in three retail units and one residential unit at the property and a 16.14% interest in two residential units at the property. (4) The joint venture owns a long-term leasehold interest in the retail space at 650 Fifth Avenue. (5) The sale of this investment closed in April 2022 for a gross consideration of $1.0 million. (6) In 2020, the Company formed a joint venture, which then entered into a long-term sublease with the Company. (7) In 2020, the Company admitted partners to the One Madison Avenue development project, which resulted in the Company no longer retaining a controlling interest in the entity, as defined in ASC 810, and the deconsolidation of our remaining 50.5% interest. We recorded our investment at fair value, which resulted in the recognition of a fair value adjustment of $187.5 million in 2020. The fair value of our investment was determined by the terms of the joint venture agreement governing the capitalization of the project. The partners have committed aggregate equity to the project totaling no less than $492.2 million and their ownership interest in the joint venture is based on their capital contributions, up to an aggregate maximum of 49.5%. As of March 31, 2022, the total of the two partners' ownership interests based on equity contributed was 39.2%. In 2021, the Company admitted an additional partner to the development project for a committed aggregate equity investment totaling no less than $259.3 million. The partner's indirect ownership interest in the joint venture is based on it's capital contributions, up to an aggregate maximum of 25.0%. The transaction did not meet sale accounting under ASC 860 and, as a result, was treated as a secured borrowing for accounting purposes and is included in Other liabilities in our consolidated balance sheets at March 31, 2022 and December 31, 2021.
Schedule of first mortgage notes payable collateralized by the respective joint venture properties and assignment of leases	The mortgage notes and other loans payable collateralized by the respective joint venture properties and assignment of leases as of March 31, 2022 and December 31, 2021, respectively, are as follows (dollars in thousands): Property Economic (1) Current Maturity Final Maturity Date (2) Interest Rate (3) March 31, 2022 December 31, 2021 Fixed Rate Debt: 717 Fifth Avenue (mortgage) 10.92 % July 2022 July 2022 4.45 % $ 300,000 $ 300,000 717 Fifth Avenue (mezzanine) 10.92 % July 2022 July 2022 5.50 % 355,328 355,328 650 Fifth Avenue (mortgage) 50.00 % October 2022 October 2022 4.46 % 210,000 210,000 650 Fifth Avenue (mezzanine) 50.00 % October 2022 October 2022 5.45 % 65,000 65,000 21 East 66th Street 32.28 % April 2023 April 2028 3.60 % 12,000 12,000 919 Third Avenue 51.00 % June 2023 June 2023 5.12 % 500,000 500,000 1515 Broadway 56.87 % March 2025 March 2025 3.93 % 796,929 801,845 11 Madison Avenue 60.00 % September 2025 September 2025 3.84 % 1,400,000 1,400,000 800 Third Avenue 60.52 % February 2026 February 2026 3.37 % 177,000 177,000 Worldwide Plaza 24.95 % November 2027 November 2027 3.98 % 1,200,000 1,200,000 One Vanderbilt Avenue 71.01 % July 2031 July 2031 2.95 % 3,000,000 3,000,000 Stonehenge Portfolio (4) Various Various Various 3.50 % 194,558 195,493 Total fixed rate debt $ 8,210,815 $ 8,216,666 Floating Rate Debt: 1552 Broadway 50.00 % October 2022 October 2022 L+ 2.65 % $ 193,132 $ 193,132 280 Park Avenue 50.00 % September 2022 September 2024 L+ 1.73 % 1,200,000 1,200,000 121 Greene Street 50.00 % November 2022 November 2022 L+ 2.00 % 13,056 13,228 2 Herald Square 51.00 % November 2022 November 2023 L+ 1.95 % 199,664 200,989 11 West 34th Street 30.00 % January 2023 January 2023 L+ 1.45 % 23,000 23,000 220 East 42nd Street 51.00 % June 2023 June 2025 L+ 2.75 % 510,000 510,000 115 Spring Street 51.00 % September 2023 September 2023 L+ 3.40 % 65,550 65,550 100 Park Avenue 49.90 % December 2023 December 2025 L+ 2.25 % 360,000 360,000 15 Beekman (5) 20.00 % January 2024 July 2025 L+ 1.50 % 50,805 43,566 10 East 53rd Street 55.00 % February 2025 February 2025 L+ 1.35 % 220,000 220,000 One Madison Avenue (6) 25.50 % November 2025 November 2026 L+ 3.35 % 193,184 169,629 21 East 66th Street 32.28 % June 2033 June 2033 T+ 2.75 % 620 632 Total floating rate debt $ 3,029,011 $ 2,999,726 Total joint venture mortgages and other loans payable $ 11,239,826 $ 11,216,392 Deferred financing costs, net (121,491) (130,516) Total joint venture mortgages and other loans payable, net $ 11,118,335 $ 11,085,876 (1) Economic interest represents the Company's interests in the joint venture as of March 31, 2022. Changes in ownership or economic interests, if any, within the current year are disclosed in the notes to the investment in unconsolidated joint ventures table above. (2) Reflects exercise of all available options. The ability to exercise extension options may be subject to certain conditions, including meeting tests based on the operating performance of the property. (3) Interest rates as of March 31, 2022, taking into account interest rate hedges in effect during the period. Floating rate debt is presented with the stated spread over the 30-day LIBOR ("L") or 1-year Treasury ("T"). (4) Comprised of three mortgages totaling $131.6 million that mature in April 2028 and two mortgages totaling $63.0 million that mature in July 2029. The sale of this investment closed in April 2022. (5) This loan is a $125.0 million construction facility. Advances under the loan are subject to costs incurred. (6) The loan is a $1.25 billion construction facility with an initial term of five years with one, one year extension option. Advances under the loan are subject to costs incurred. In conjunction with the loan, we provided partial guarantees for interest and principal payments, the amounts of which are based on certain construction milestones and operating metrics.
Schedule of combined balance sheets for the unconsolidated joint ventures	The combined balance sheets for the unconsolidated joint ventures, at March 31, 2022 and December 31, 2021 are as follows (in thousands): March 31, 2022 December 31, 2021 Assets (1) Commercial real estate property, net $ 14,785,274 $ 14,763,874 Cash and restricted cash 751,944 768,510 Tenant and other receivables, related party receivables, and deferred rents receivable 562,483 533,455 Other assets 1,796,952 1,776,030 Total assets $ 17,896,653 $ 17,841,869 Liabilities and equity (1) Mortgages and other loans payable, net $ 11,118,335 $ 11,085,876 Deferred revenue 1,141,181 1,158,242 Lease liabilities 999,553 980,595 Other liabilities 368,957 352,499 Equity 4,268,627 4,264,657 Total liabilities and equity $ 17,896,653 $ 17,841,869 Company's investments in unconsolidated joint ventures $ 3,000,986 $ 2,997,934 (1) At March 31, 2022, $550.4 million of net unamortized basis differences between the amount at which our investments are carried and our share of equity in net assets of the underlying property will be amortized through equity in net income (loss) from unconsolidated joint ventures over the remaining life of the underlying items having given rise to the differences.
Schedule of combined statements of income for the unconsolidated joint ventures	The combined statements of operations for the unconsolidated joint ventures, from acquisition date through the three months ended March 31, 2022 and 2021, are as follows (in thousands): Three Months Ended March 31, 2022 2021 Total revenues $ 335,266 $ 301,541 Operating expenses 59,914 46,233 Real estate taxes 60,722 54,592 Operating lease rent 6,268 5,644 Interest expense, net of interest income 94,913 78,749 Amortization of deferred financing costs 6,757 6,384 Depreciation and amortization 112,713 114,879 Total expenses 341,287 306,481 Net loss before gain on sale $ (6,021) $ (4,940) Company's equity in net loss from unconsolidated joint ventures $ (4,715) $ (2,864)

Deferred Costs (Tables)

Deferred Costs (Tables)	3 Months Ended
	Mar. 31, 2022
Deferred Costs, Capitalized, Prepaid, and Other Assets Disclosure [Abstract]
Schedule of components of deferred costs	Deferred costs as of March 31, 2022 and December 31, 2021 consisted of the following (in thousands): March 31, 2022 December 31, 2021 Deferred leasing costs $ 404,778 $ 400,419 Less: accumulated amortization (282,484) (275,924) Deferred costs, net $ 122,294 $ 124,495

Mortgages and Other Loans Pay_2

Mortgages and Other Loans Payable (Tables)	3 Months Ended
	Mar. 31, 2022
Mortgages and Other Loans Payable
Schedule of first mortgages and other loans payable collateralized by the respective properties and assignment of leases	The mortgages and other loans payable collateralized by the respective properties and assignment of leases or debt investments as of March 31, 2022 and December 31, 2021, respectively, were as follows (dollars in thousands): Property Current Maturity Final Maturity Date (1) Interest Rate (2) March 31, 2022 December 31, 2021 Fixed Rate Debt: 100 Church Street July 2022 July 2022 4.68% $ 198,980 $ 200,212 420 Lexington Avenue October 2024 October 2040 3.99% 287,243 288,660 Landmark Square January 2027 January 2027 4.90% 100,000 100,000 485 Lexington Avenue February 2027 February 2027 4.25% 450,000 450,000 1080 Amsterdam (3) February 2027 February 2027 3.59% 34,348 34,537 Total fixed rate debt $ 1,070,571 $ 1,073,409 Floating Rate Debt: 7 Dey / 185 Broadway (4) November 2022 November 2023 L+ 2.85% $ 203,478 $ 198,169 719 Seventh Avenue September 2023 September 2023 L+ 1.20% 50,000 50,000 690 Madison Avenue July 2024 July 2025 L+ 1.50% 60,000 60,000 609 Fifth Avenue March 2022 March 2025 L+ —% — 52,882 2017 Master Repurchase Agreement (5) — — Total floating rate debt $ 313,478 $ 361,051 Total fixed rate and floating rate debt $ 1,384,049 $ 1,434,460 Mortgages reclassed to liabilities related to assets held for sale (34,348) (34,537) Total mortgages and other loans payable $ 1,349,701 $ 1,399,923 Deferred financing costs, net of amortization (4,926) (5,537) Total mortgages and other loans payable, net $ 1,344,775 $ 1,394,386 (1) Reflects exercise of all available options. The ability to exercise extension options may be subject to certain tests based on the operating performance of the property. (2) Interest rate as of March 31, 2022, taking into account interest rate hedges in effect during the period. Floating rate debt is presented with the stated spread over the 30-day LIBOR, unless otherwise specified. (3) The loan is comprised of a $33.4 million mortgage loan and $0.9 million mezzanine loan with a fixed interest rate of 350 basis points and 700 basis points, respectively, for the first five years and is prepayable without penalty at the end of the fifth year. The Company closed on the sale of this investment in April 2022. (4) This loan is a $225.0 million construction facility, with reductions in interest cost based on meeting certain conditions, and has an initial three year term with two one year extension options. In October 2021, an extension option was exercised, and the maturity date of this loan was extended by one year. Advances under the loan are subject to incurred costs and funded equity requirements.

Corporate Indebtedness (Tables)

Corporate Indebtedness (Tables)	3 Months Ended
	Mar. 31, 2022
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 March 31, 2022 and December 31, 2021, respectively, by scheduled maturity date (dollars in thousands): Issuance March 31, 2022 March 31, 2022 December 31, Interest Rate (1) Initial Term Maturity Date October 5, 2017 (2) $ 500,000 $ 499,940 $ 499,913 3.25 % 5 October 2022 November 15, 2012 (3) 300,000 300,728 301,002 4.50 % 10 December 2022 December 17, 2015 (4) 100,000 100,000 100,000 4.27 % 10 December 2025 $ 900,000 $ 900,668 $ 900,915 Deferred financing costs, net — (1,127) (1,607) $ 900,000 $ 899,541 $ 899,308 (1) Interest rate as of March 31, 2022, taking into account interest rate hedges in effect during the period. (2) Issued by the Operating Partnership with the Company as the guarantor. (3) In October 2017, the Company and the Operating Partnership as co-obligors issued an additional $100.0 million of 4.50% senior unsecured notes due December 2022. The notes were priced at 105.334% of par. (4) Issued by the Company and the Operating Partnership as co-obligors.
Schedule of combined aggregate principal maturities	Combined aggregate principal maturities of mortgages and other loans payable, the 2021 credit facility, trust preferred securities, senior unsecured notes and our share of joint venture debt as of March 31, 2022, including as-of-right extension options, were as follows (in thousands): Scheduled Principal Revolving Unsecured Term Loans Trust Senior Total Joint Remaining 2022 $ 5,962 $ 401,261 $ — $ — $ — $ 800,000 $ 1,207,223 $ 422,442 2023 6,640 50,000 — — — — 56,640 750,696 2024 5,328 332,749 — 200,000 — — 538,077 626,671 2025 873 — — — — 100,000 100,873 1,431,734 2026 904 — 500,000 — — — 500,904 107,230 Thereafter 75 580,257 — 1,050,000 100,000 — 1,730,332 2,435,913 $ 19,782 $ 1,364,267 $ 500,000 $ 1,250,000 $ 100,000 $ 900,000 $ 4,134,049 $ 5,774,686
Schedule of consolidated interest expense, excluding capitalized interest	Consolidated interest expense, excluding capitalized interest, was comprised of the following (in thousands): Three Months Ended March 31, 2022 2021 Interest expense before capitalized interest $ 32,052 $ 39,868 Interest on financing leases 1,237 1,492 Interest capitalized (17,941) (17,583) Interest income (278) (389) Interest expense, net $ 15,070 $ 23,388

Related Party Transactions (Tab

Related Party Transactions (Tables)	3 Months Ended
	Mar. 31, 2022
Related Party Transactions [Abstract]
Schedule of amounts due from/to related parties	Amounts due from joint ventures and related parties as of March 31, 2022 and December 31, 2021 consisted of the following (in thousands): March 31, 2022 December 31, 2021 Due from joint ventures $ 31,001 $ 28,204 Other 710 1,204 Related party receivables $ 31,711 $ 29,408

Noncontrolling Interests on t_2

Noncontrolling Interests on the Company's Consolidated Financial Statements (Tables)	3 Months Ended
	Mar. 31, 2022
Noncontrolling Interest [Abstract]
Schedule of noncontrolling interest	Below is a summary of the activity relating to the noncontrolling interests in the Operating Partnership for the three months ended March 31, 2022 and the twelve months ended December 31, 2021 (in thousands): March 31, 2022 December 31, 2021 Balance at beginning of period $ 344,252 $ 358,262 Distributions (4,415) (15,749) Issuance of common units 6,721 18,678 Redemption and conversion of common units (18,272) (53,289) Net income 492 25,457 Accumulated other comprehensive loss allocation 2,277 1,042 Fair value adjustment 43,023 9,851 Balance at end of period $ 374,078 $ 344,252
Schedule of preferred unit activity	Below is a summary of the preferred units of limited partnership interest in the Operating Partnership as of March 31, 2022: Issuance Stated Distribution Rate Number of Units Authorized Number of Units Issued Number of Units Outstanding Annual Dividend Per Unit (1) Liquidation Preference Per Unit (2) Conversion Price Per Unit (3) Date of Issuance Series A (4) 3.50 % 109,161 109,161 109,161 $ 35.0000 $ 1,000.00 $ — August 2015 Series F 7.00% 60 60 60 70.0000 1,000.00 29.12 January 2007 Series K 3.50% 700,000 563,954 341,677 0.8750 25.00 134.67 August 2014 Series L 4.00% 500,000 378,634 372,634 1.0000 25.00 — August 2014 Series P 4.00% 200,000 200,000 200,000 1.0000 25.00 — July 2015 Series Q 3.50% 268,000 268,000 268,000 0.8750 25.00 148.95 July 2015 Series R 3.50% 400,000 400,000 400,000 0.8750 25.00 154.89 August 2015 Series S 4.00% 1,077,280 1,077,280 1,077,280 1.0000 25.00 — August 2015 Series V 3.50% 40,000 40,000 40,000 0.8750 25.00 — May 2019 Series W (5) (6) 1 1 1 (6) (6) (6) January 2020 (1) Dividends are cumulative, subject to certain provisions. (2) Units are redeemable at any time at par for cash at the option of the unitholder unless otherwise specified. (3) If applicable, 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) the amount shown in the table. (4) Issued through a consolidated subsidiary. The units are convertible on a one-for-one basis, into the Series B Preferred Units of limited partnership interest, or the Subsidiary Series B Preferred Units. The Subsidiary Series B Preferred Units can be converted at any time, at the option of the unitholder, into a number of common stock equal to 6.71348 shares of common stock for each Subsidiary Series B Preferred Unit. As of March 31, 2022, no Subsidiary Series B Preferred Units have been issued. (5) The Series W preferred unit was issued in January 2020 in exchange for the then-outstanding Series O preferred unit. The holder of the Series W preferred unit is entitled to quarterly dividends in an amount calculated as (i) 1,350 multiplied by (ii) the current distribution per common unit of limited partnership in SL Green Operating Partnership. The holder has the right to require the Operating Partnership to repurchase the Series W unit for cash, or convert the Series W unit for Class B units, in each case at a price that is determined based on the closing price of the Company's common stock at the time such right is exercised. The unit's liquidation preference is the fair market value of the unit plus accrued distributions at the time of a liquidation event. Below is a summary of the activity relating to the preferred units in the Operating Partnership for the three months ended March 31, 2022 and the twelve months ended December 31, 2021 (in thousands): March 31, 2022 December 31, 2021 Balance at beginning of period $ 196,075 $ 202,169 Issuance of preferred units — — Redemption of preferred units (17,967) (6,040) Dividends paid on preferred units (1,662) (6,760) Accrued dividends on preferred units 1,497 6,706 Balance at end of period $ 177,943 $ 196,075

Stockholders' Equity of the C_2

Stockholders' Equity of the Company (Tables)	3 Months Ended
	Mar. 31, 2022
Stockholders' Equity Note [Abstract]
Class of treasury stock	As of March 31, 2022, share repurchases executed under the program, excluding the redemption of OP units, were as follows: Period Shares repurchased Average price paid per share Cumulative number of shares repurchased as part of the repurchase plan or programs Year ended 2017 7,865,206 $107.81 7,865,206 Year ended 2018 9,187,480 $102.06 17,052,686 Year ended 2019 4,333,260 $88.69 21,385,946 Year ended 2020 8,276,032 $64.30 29,661,978 Year ended 2021 4,474,649 $75.44 34,136,627 Three months ended March 31, 2022 1,971,092 $76.69 36,107,719
Schedule of common stock issued and proceeds received dividend reinvestments	The following table summarizes SL Green common stock issued, and proceeds received from dividend reinvestments and/or stock purchases under the DRSPP for the three months ended March 31, 2022 and 2021, respectively (dollars in thousands): Three Months Ended March 31, 2022 2021 Shares of common stock issued 1,132 5,320 Dividend reinvestments/stock purchases under the DRSPP $ 89 $ 351
Schedule of earnings per share	SL Green's earnings per share for the three months ended March 31, 2022 and 2021 are computed as follows (in thousands): Three Months Ended March 31, Numerator 2022 2021 Basic Earnings: Income (loss) attributable to SL Green common stockholders $ 7,751 $ (7,464) Less: distributed earnings allocated to participating securities (335) (364) Net income (loss) attributable to SL Green common stockholders (numerator for basic earnings per share) $ 7,416 $ (7,828) Add back: dilutive effect of earnings allocated to participating securities and contingently issuable shares (96) 7 Add back: effect of dilutive securities (redemption of units to common shares) 492 (476) Net income (loss) attributable to SL Green common stockholders (numerator for diluted earnings per share) $ 7,812 $ (8,297) Three Months Ended March 31, Denominator 2022 2021 Basic Shares: Weighted average common stock outstanding 64,349 66,961 Effect of Dilutive Securities: Operating Partnership units redeemable for common shares 4,121 4,148 Stock-based compensation plans 984 588 Contingently issuable shares 774 307 Diluted weighted average common stock outstanding 70,228 72,004

Partners' Capital of the Oper_2

Partners' Capital of the Operating Partnership (Tables)	3 Months Ended
	Mar. 31, 2022
Equity [Abstract]
Schedule of calculation of numerator and denominator in earnings per unit	The Operating Partnership's earnings per unit for the three months ended March 31, 2022 and 2021, respectively, are computed as follows (in thousands): Three Months Ended March 31, Numerator 2022 2021 Basic Earnings: Net income attributable to SLGOP common unitholders (numerator for diluted earnings per unit) $ 8,243 $ (7,940) Less: distributed earnings allocated to participating securities (335) (364) Net Income attributable to SLGOP common unitholders (numerator for basic earnings per unit) $ 7,908 $ (8,304) Add back: dilutive effect of earnings allocated to participating securities and contingently issuable shares (96) 7 Net Income attributable to SLGOP common unitholders (numerator for diluted earnings per unit) $ 7,812 $ (8,297) Three Months Ended March 31, Denominator 2022 2021 Basic units: Weighted average common units outstanding 68,470 71,109 Effect of Dilutive Securities: Stock-based compensation plans 984 588 Contingently issuable units 774 307 Diluted weighted average common units outstanding 70,228 72,004

Share-based Compensation (Table

Share-based Compensation (Tables)	3 Months Ended
	Mar. 31, 2022
Share-based Payment Arrangement [Abstract]
Summary of the status of stock options and changes during the period	A summary of the status of the Company's stock options as of March 31, 2022 and December 31, 2021, and changes during the three months ended March 31, 2022 and year ended December 31, 2021 are as follows: March 31, 2022 December 31, 2021 Options Outstanding Weighted Average Options Outstanding Weighted Average Balance at beginning of period 394,089 $ 100.56 761,686 $ 105.76 Exercised — — (11,314) 72.30 Lapsed or canceled (28,283) 112.48 (356,283) 112.56 Balance at end of period 365,806 $ 99.64 394,089 $ 100.56 Options exercisable at end of period 365,806 $ 99.64 394,089 $ 100.56
Summary of restricted stock and charges during the period	A summary of the Company's restricted stock as of March 31, 2022 and December 31, 2021 and changes during the three months ended March 31, 2022 and the year ended December 31, 2021, are as follows: March 31, 2022 December 31, 2021 Balance at beginning of period 3,459,363 3,337,545 Granted 77,148 141,515 Canceled (9,075) (19,697) Balance at end of period 3,527,436 3,459,363 Vested during the period 116,862 122,759 Compensation expense recorded $ 1,920,738 $ 8,497,054 Total fair value of restricted stock granted during the period $ 5,931,470 $ 9,214,531

Accumulated Other Comprehensi_2

Accumulated Other Comprehensive Loss (Tables)	3 Months Ended
	Mar. 31, 2022
Equity [Abstract]
Schedule of accumulated other comprehensive loss	The following tables set forth the changes in accumulated other comprehensive loss by component as of March 31, 2022 (in thousands): Net unrealized gain (loss) on derivative instruments ( 1 ) SL Green’s share of joint venture net unrealized loss on derivative instruments ( 2 ) Net unrealized (loss) gain on marketable securities Total Balance at December 31, 2021 $ (25,881) $ (21,994) $ 1,117 $ (46,758) Other comprehensive gain before reclassifications 26,790 9,785 (1,691) 34,884 Amounts reclassified from accumulated other comprehensive loss 3,649 964 — 4,613 Balance at March 31, 2022 $ 4,558 $ (11,245) $ (574) $ (7,261) (1) Amount reclassified from accumulated other comprehensive loss is included in interest expense in the respective consolidated statements of operations. As of March 31, 2022 and December 31, 2021, the deferred net gains from these terminated hedges, which is included in accumulated other comprehensive loss relating to net unrealized loss on derivative instruments, was $(0.6) million and $(0.6) million, respectively. (2) Amount reclassified from accumulated other comprehensive loss is included in equity in net loss from unconsolidated joint ventures in the respective consolidated statements of operations.

Fair Value Measurements (Tables

Fair Value Measurements (Tables)	3 Months Ended
	Mar. 31, 2022
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 as of March 31, 2022 and December 31, 2021 (in thousands): March 31, 2022 Total Level 1 Level 2 Level 3 Assets: Marketable securities available-for-sale $ 22,353 $ — $ 22,353 $ — Interest rate cap and swap agreements (included in Other assets) 10,052 — 10,052 — Liabilities: Interest rate cap and swap agreements (included in Other liabilities) $ 5,795 $ — $ 5,795 $ — December 31, 2021 Total Level 1 Level 2 Level 3 Assets: Marketable securities available-for-sale $ 24,146 $ — $ 24,146 $ — Interest rate cap and swap agreements (included in Other assets) 1,896 — 1,896 — Liabilities: Interest rate cap and swap agreements (included in Other liabilities) $ 29,912 $ — $ 29,912 $ —
Fair value, by balance sheet grouping	The following table provides the carrying value and fair value of these financial instruments as of March 31, 2022 and December 31, 2021 (in thousands): March 31, 2022 December 31, 2021 Carrying Value (1) Fair Value Carrying Value (1) Fair Value Debt and preferred equity investments $ 1,107,870 (2) $ 1,088,723 (2) Fixed rate debt $ 3,321,239 $ 3,322,000 $ 3,274,324 $ 3,336,463 Variable rate debt 813,478 813,040 801,051 800,672 $ 4,134,717 $ 4,135,040 $ 4,075,375 $ 4,137,135 (1) Amounts exclude net deferred financing costs. (2) As of March 31, 2022, debt and preferred equity investments had an estimated fair value ranging between $1.0 billion and $1.1 billion. As of December 31, 2021, debt and preferred equity investments had an estimated fair value ranging between $1.0 billion and $1.1 billion.

Financial Instruments_ Deriva_2

Financial Instruments: Derivatives and Hedging (Tables)	3 Months Ended
	Mar. 31, 2022
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 value at inception and fair value of our consolidated derivative financial instruments as of March 31, 2022 based on Level 2 information. 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 (dollars in thousands). Notional Strike Effective Expiration Balance Sheet Location Fair Interest Rate Cap $ 111,869 3.500 % November 2021 November 2022 Other Assets $ 9 Interest Rate Swap 100,000 0.212 % January 2021 January 2023 Other Assets 1,223 Interest Rate Swap 400,000 0.184 % January 2022 February 2023 Other Assets 4,838 Interest Rate Swap 50,000 0.633 % February 2022 February 2023 Other Assets 373 Interest Rate Swap 100,000 1.163 % November 2021 July 2023 Other Assets 1,177 Interest Rate Swap 200,000 1.133 % November 2021 July 2023 Other Assets 2,432 Interest Rate Swap 150,000 2.700 % December 2021 January 2024 Other Liabilities (1,153) Interest Rate Swap 150,000 2.721 % December 2021 January 2026 Other Liabilities (1,865) Interest Rate Swap 200,000 2.762 % December 2021 January 2026 Other Liabilities (2,777) $ 4,257 The following table summarizes the notional value at inception and fair value of our joint ventures' derivative financial instruments as of March 31, 2022 based on Level 2 information. 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 (dollars in thousands). Notional Strike Effective Expiration Classification Fair Interest Rate Cap $ 1,075,000 2.850 % September 2021 September 2022 Asset $ 21 Interest Rate Cap 125,000 2.850 % September 2021 September 2022 Asset 2 Interest Rate Cap 23,000 4.750 % January 2021 January 2023 Asset 2 Interest Rate Cap 220,000 4.000 % February 2022 February 2023 Asset 68 Interest Rate Cap 510,000 3.000 % December 2021 June 2023 Asset 1,297 Interest Rate Cap 237,340 0.550 % February 2022 May 2024 Asset 14,994 Interest Rate Cap 118,670 0.550 % February 2022 May 2024 Asset 14,977 Interest Rate Swap 177,000 1.669 % March 2016 February 2026 Asset 5,014 $ 36,375
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 operations for the three months ended March 31, 2022 and 2021, respectively (in thousands): Amount of Gain Location of Loss Reclassified from Accumulated Other Comprehensive Loss into Income Amount of Loss Reclassified from Three Months Ended March 31, Three Months Ended March 31, Derivative 2022 2021 2022 2021 Interest Rate Swaps/Caps $ 28,378 $ 10,220 Interest expense $ (3,866) $ (4,388) Share of unconsolidated joint ventures' derivative instruments 10,308 34,955 Equity in net loss from unconsolidated joint ventures (1,015) (1,700) $ 38,686 $ 45,175 $ (4,881) $ (6,088)

Lease Income (Tables)

Lease Income (Tables)	3 Months Ended
	Mar. 31, 2022
Leases [Abstract]
Operating lease, lease income	The components of lease income from operating leases during the three months ended March 31, 2022 and 2021 were as follows (in thousands): Three Months Ended March 31, 2022 2021 Fixed lease payments $ 136,581 $ 164,679 Variable lease payments 19,555 25,279 Total lease payments (1) $ 156,136 $ 189,958 Amortization of acquired above and below-market leases (105) (1,869) Total rental revenue $ 156,031 $ 188,089 (1) Amounts include $56.2 million and $65.8 million of sublease income during the three months ended March 31, 2022 and 2021, respectively.
Sales-type lease, lease income	The components of lease income from sales-type leases during the three months ended March 31, 2022 and 2021 were as follows (in thousands): Three Months Ended March 31, 2022 2021 Interest income (1) $ 1,092 $ 1,101 (1) These amounts are included in Other income in our consolidated statements of operations.

Segment Information (Tables)

Segment Information (Tables)	3 Months Ended
	Mar. 31, 2022
Segment Reporting [Abstract]
Schedule of selected results of operations and selected asset information	Selected consolidated results of operations for the three months ended March 31, 2022 and 2021, and selected asset information as of March 31, 2022 and December 31, 2021, regarding our operating segments are as follows (in thousands): Real Estate Segment Debt and Preferred Equity Segment Total Company Total revenues Three months ended: March 31, 2022 $ 168,076 $ 19,888 $ 187,964 March 31, 2021 206,829 19,273 226,102 Net income (loss) Three months ended: March 31, 2022 $ (3,482) $ 16,967 $ 13,485 March 31, 2021 (20,027) 16,172 (3,855) Total assets As of: March 31, 2022 $ 9,902,557 $ 1,112,408 $ 11,014,965 December 31, 2021 9,974,140 1,092,489 11,066,629

Organization and Basis of Pre_3

Organization and Basis of Presentation - Additional Information (Details) $ / shares in Units, $ in Millions	Jan. 18, 2022$ / sharesshares	Jan. 10, 2022	Jan. 07, 2022$ / shares	Dec. 02, 2021$ / shares	Mar. 31, 2022USD ($)ft²building$ / sharesshares	Mar. 31, 2021$ / shares	Apr. 30, 2022USD ($)	Dec. 31, 2021
Organization
Cash distribution declared, per common share (in dollars per share)					$ 0.932	$ 0.938
Volume weighted average share price (in dollars per share)			$ 79.71
Number of buildings | building					58
Area of office building (sqft) | ft²					27,549,252
Debt and preferred equity investments including investments held by unconsolidated joint ventures | $					$ 1,100
Debt and preferred equity investments and other financing receivables included in other balance sheet items | $					$ 100
Number of shares to be received on redemption of one unit of limited partnership interests (shares) | shares					1
Shareholder Election, Cash Option Subject to Proration
Organization
Common stock, dividends, per share, cash paid (in dollars per share)	$ 0.3976
Common stock, dividends, per share, stock issued (in shares) | shares	0.0295
Shareholder Election, Stock Option
Organization
Common stock, dividends, per share, stock issued (in shares) | shares	0.0345
1080 Amsterdam Avenue
Organization
Sales price | $					$ 42.7
1080 Amsterdam Avenue | Subsequent Event
Organization
Sales price | $							$ 42.7
Stonehenge Properties | Subsequent Event
Organization
Sales price | $							$ 1
Managed office properties
Organization
Number of buildings | building					1
Area of office building (sqft) | ft²					300,000
Ordinary Dividend
Organization
Cash distribution declared, per common share (in dollars per share)				$ 0.3108
Special Dividend
Organization
Cash distribution declared, per common share (in dollars per share)				$ 2.4392
Common Stock
Organization
Reverse stock split conversion ratio		1.03060
SL Green Operating Partnership
Organization
Cash distribution declared, per common share (in dollars per share)					$ 0.932	$ 0.938
Service Corporation
Organization
Percentage of ownership in SL Green Management LLC owned by operating partnership (percent)					95.00%
Operating Partnership | SL Green Operating Partnership
Organization
Noncontrolling interest in the operating partnership (as a percent)					6.00%			5.57%
SL Green Management | SL Green Management LLC
Organization
Percentage of ownership in SL Green Management LLC owned by operating partnership (percent)					100.00%

Organization and Basis of Pre_4

Organization and Basis of Presentation - Schedule of Commercial Office Properties (Details)	Mar. 31, 2022ft²building
Real estate properties
Number of Buildings | building	58
Approximate Square Feet unaudited (sqft)	27,549,252
Weighted Average Occupancy unaudited (as a percent)	91.00%
Commercial properties
Real estate properties
Number of Buildings | building	50
Approximate Square Feet unaudited (sqft)	26,880,686
Weighted Average Occupancy unaudited (as a percent)	91.00%
Consolidated properties
Real estate properties
Number of Buildings | building	30
Approximate Square Feet unaudited (sqft)	11,521,631
Consolidated properties | Commercial properties
Real estate properties
Number of Buildings | building	28
Approximate Square Feet unaudited (sqft)	11,298,999
Unconsolidated properties
Real estate properties
Number of Buildings | building	28
Approximate Square Feet unaudited (sqft)	16,027,621
Unconsolidated properties | Commercial properties
Real estate properties
Number of Buildings | building	22
Approximate Square Feet unaudited (sqft)	15,581,687
Manhattan
Real estate properties
Number of Buildings | building	43
Approximate Square Feet unaudited (sqft)	26,017,886
Weighted Average Occupancy unaudited (as a percent)	91.50%
Manhattan | Office
Real estate properties
Number of Buildings | building	23
Approximate Square Feet unaudited (sqft)	21,841,726
Weighted Average Occupancy unaudited (as a percent)	91.50%
Manhattan | Retail
Real estate properties
Number of Buildings | building	11
Approximate Square Feet unaudited (sqft)	319,884
Weighted Average Occupancy unaudited (as a percent)	91.20%
Manhattan | Development/Redevelopment
Real estate properties
Number of Buildings | building	8
Approximate Square Feet unaudited (sqft)	3,848,592
Manhattan | Fee Interest
Real estate properties
Number of Buildings | building	1
Approximate Square Feet unaudited (sqft)	7,684
Manhattan | Residential
Real estate properties
Number of Buildings | building	8
Approximate Square Feet unaudited (sqft)	668,566
Weighted Average Occupancy unaudited (as a percent)	87.90%
Manhattan | Consolidated properties
Real estate properties
Number of Buildings | building	21
Approximate Square Feet unaudited (sqft)	10,436,199
Manhattan | Consolidated properties | Office
Real estate properties
Number of Buildings | building	12
Approximate Square Feet unaudited (sqft)	8,180,345
Manhattan | Consolidated properties | Retail
Real estate properties
Number of Buildings | building	2
Approximate Square Feet unaudited (sqft)	17,888
Manhattan | Consolidated properties | Retail | 7 Dey / 185 Broadway
Real estate properties
Approximate Square Feet unaudited (sqft)	50,206
Manhattan | Consolidated properties | Development/Redevelopment
Real estate properties
Number of Buildings | building	6
Approximate Square Feet unaudited (sqft)	2,230,282
Manhattan | Consolidated properties | Fee Interest
Real estate properties
Number of Buildings | building	1
Approximate Square Feet unaudited (sqft)	7,684
Manhattan | Consolidated properties | Residential
Real estate properties
Number of Buildings | building	2
Approximate Square Feet unaudited (sqft)	222,632
Manhattan | Consolidated properties | Residential | 7 Dey / 185 Broadway
Real estate properties
Approximate Square Feet unaudited (sqft)	140,382
Manhattan | Unconsolidated properties
Real estate properties
Number of Buildings | building	22
Approximate Square Feet unaudited (sqft)	15,581,687
Manhattan | Unconsolidated properties | Office
Real estate properties
Number of Buildings | building	11
Approximate Square Feet unaudited (sqft)	13,661,381
Manhattan | Unconsolidated properties | Retail
Real estate properties
Number of Buildings | building	9
Approximate Square Feet unaudited (sqft)	301,996
Manhattan | Unconsolidated properties | Development/Redevelopment
Real estate properties
Number of Buildings | building	2
Approximate Square Feet unaudited (sqft)	1,618,310
Manhattan | Unconsolidated properties | Fee Interest
Real estate properties
Number of Buildings | building	0
Approximate Square Feet unaudited (sqft)	0
Manhattan | Unconsolidated properties | Residential
Real estate properties
Number of Buildings | building	6
Approximate Square Feet unaudited (sqft)	445,934
Suburban | Office
Real estate properties
Number of Buildings | building	7
Approximate Square Feet unaudited (sqft)	862,800
Weighted Average Occupancy unaudited (as a percent)	78.60%
Suburban | Consolidated properties | Office
Real estate properties
Number of Buildings | building	7
Approximate Square Feet unaudited (sqft)	862,800
Suburban | Unconsolidated properties | Office
Real estate properties
Number of Buildings | building	0
Approximate Square Feet unaudited (sqft)	0

Significant Accounting Polici_4

Significant Accounting Policies - Investments in Commercial Real Estate Properties (Details) - USD ($)	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021	Dec. 31, 2021
Investment in Commercial Real Estate Properties
Rental revenue decrease from amortization of acquired leases	$ (100,000)	$ (1,900,000)
Identified intangible assets (included in other assets):
Gross amount	199,722,000		$ 199,722,000
Accumulated amortization	(184,129,000)		(182,643,000)
Net	15,593,000		17,079,000
Identified intangible liabilities (included in deferred revenue):
Gross amount	212,767,000		212,767,000
Accumulated amortization	(210,454,000)		(210,262,000)
Net	2,313,000		2,505,000
Net intangible assets reclassified to assets held for sale	0		1,800,000
Net intangible liabilities reclassified to liabilities relates to assets held for sale	$ 0		$ 0
Minimum | Above-market leases
Investment in Commercial Real Estate Properties
Estimated useful life of other intangible assets (in years)	1 year
Minimum | Below-market leases
Investment in Commercial Real Estate Properties
Estimated useful life of other intangible assets (in years)	1 year
Minimum | In-place leases
Investment in Commercial Real Estate Properties
Estimated useful life of other intangible assets (in years)	1 year
Maximum | Above-market leases
Investment in Commercial Real Estate Properties
Estimated useful life of other intangible assets (in years)	15 years
Maximum | Below-market leases
Investment in Commercial Real Estate Properties
Estimated useful life of other intangible assets (in years)	15 years
Maximum | In-place leases
Investment in Commercial Real Estate Properties
Estimated useful life of other intangible assets (in years)	15 years
Building | Minimum
Investment in Commercial Real Estate Properties
Estimated useful life (in years)	3 years
Building | Maximum
Investment in Commercial Real Estate Properties
Estimated useful life (in years)	40 years

Significant Accounting Polici_5

Significant Accounting Policies - Investment in Marketable Securities (Details)	3 Months Ended		12 Months Ended
	Mar. 31, 2022USD ($)security	Mar. 31, 2021USD ($)	Dec. 31, 2021USD ($)security
Investment in Marketable Securities
Total marketable securities available-for-sale	$ 22,353,000		$ 24,146,000
Total investment in marketable securities	32,889,000		34,752,000
Marketable securities, unrealized loss	100,000
Proceeds from sale of marketable securities	$ 0	$ 5,000,000
Number of marketable securities sold | security	1
Fair Value
Investment in Marketable Securities
Total marketable securities available-for-sale	$ 22,353,000		24,146,000
Total investment in marketable securities	32,889,000		34,752,000
Commercial mortgage-backed securities
Investment in Marketable Securities
Total marketable securities available-for-sale	22,353,000		24,146,000
Cost basis of commercial mortgage-backed securities	$ 23,000,000		$ 23,000,000
Number of securities in continuous unrealized loss position | security	1		1
Unrealized loss	$ 2,100,000		$ 600,000
Fair value of security in a continuous unrealized loss position for less than 12 months	5,700,000		7,200,000
Equity marketable securities
Investment in Marketable Securities
Total investment in marketable securities	$ 10,536,000		$ 10,606,000

Significant Accounting Polici_6

Significant Accounting Policies - Income Taxes (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021
Income taxes
Federal, state and local tax provision	$ 0.9	$ 0.7

Significant Accounting Polici_7

Significant Accounting Policies - Concentrations of Credit Risk/Accounting Standards Updates (Details) - Annualized rent - Customer concentration	3 Months Ended
	Mar. 31, 2022tenant
Concentration of Credit Risk
Number of tenants (tenants)	1
Maximum percentage of annualized rent for any one tenant not individually disclosed (percent) (more than)	5.00%
One Vanderbilt Avenue
Concentration of Credit Risk
Percentage of concentration (percent)	14.30%
11 Madison Avenue
Concentration of Credit Risk
Percentage of concentration (percent)	9.30%
420 Lexington Avenue
Concentration of Credit Risk
Percentage of concentration (percent)	7.00%
1185 Avenue of the Americas
Concentration of Credit Risk
Percentage of concentration (percent)	7.00%
1515 Broadway
Concentration of Credit Risk
Percentage of concentration (percent)	6.90%
280 Park Avenue
Concentration of Credit Risk
Percentage of concentration (percent)	5.80%
Tenant 1
Concentration of Credit Risk
Percentage of concentration (percent)	6.30%

Properties Held for Sale and _3

Properties Held for Sale and Property Dispositions (Details) $ in Millions	1 Months Ended
	Jan. 31, 2022USD ($)ft²	Mar. 31, 2022USD ($)ft²
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Area of office building (sqft) | ft²		27,549,252
1080 Amsterdam Avenue
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Sales price		$ 42.7
707 Eleventh Avenue
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Sales price	$ 95
Area of office building (sqft) | ft²	159,720
Gain (loss)	$ (0.8)

Debt and Preferred Equity Inv_3

Debt and Preferred Equity Investments - Rollforward of Net Book Balance (Details) - USD ($) $ in Thousands	3 Months Ended	12 Months Ended
	Mar. 31, 2022	Dec. 31, 2021
SEC Schedule, 12-29, Real Estate Companies, Investment in Movement in Mortgage Loans on Real Estate [Roll Forward]
Balance at beginning of period	$ 1,088,723	$ 1,076,542
Redemptions/sales/syndications/equity ownership/amortization	(6,405)	(201,446)
Net change in loan loss reserves	0	6,583
Balance at end of period	1,107,870	1,088,723
Debt investment originations/fundings/accretion
SEC Schedule, 12-29, Real Estate Companies, Investment in Movement in Mortgage Loans on Real Estate [Roll Forward]
Originations/Accretion	16,615	193,824
Preferred equity investment originations/accretion
SEC Schedule, 12-29, Real Estate Companies, Investment in Movement in Mortgage Loans on Real Estate [Roll Forward]
Originations/Accretion	$ 8,937	$ 13,220

Debt and Preferred Equity Inv_4

Debt and Preferred Equity Investments - Debt and Preferred Equity Investments (Details) - USD ($) $ in Thousands	Mar. 31, 2022	Dec. 31, 2021
Debt Instrument [Line Items]
Carrying Value	$ 1,107,870	$ 1,088,723
Senior Financing	6,663,176
Total floating rate
Debt Instrument [Line Items]
Carrying Value	302,128
Face Value	302,903
Total fixed rate
Debt Instrument [Line Items]
Carrying Value	805,742
Face Value	815,268
Senior Mortgage Debt
Debt Instrument [Line Items]
Carrying Value	99,088
Senior Financing	$ 0
Weighted Average Yield at End of Period	4.25%
Senior Mortgage Debt | Total floating rate
Debt Instrument [Line Items]
Carrying Value	$ 26,088
Face Value	26,233
Senior Mortgage Debt | Total fixed rate
Debt Instrument [Line Items]
Carrying Value	73,000
Face Value	73,000
Mezzanine Debt
Debt Instrument [Line Items]
Carrying Value	726,839
Senior Financing	$ 4,700,426
Weighted Average Yield at End of Period	6.98%
Mezzanine Debt | Total floating rate
Debt Instrument [Line Items]
Carrying Value	$ 276,040
Face Value	276,670
Mezzanine Debt | Total fixed rate
Debt Instrument [Line Items]
Carrying Value	450,799
Face Value	459,865
Preferred Equity
Debt Instrument [Line Items]
Carrying Value	281,943
Senior Financing	$ 1,962,750
Weighted Average Yield at End of Period	9.64%
Preferred Equity | Total floating rate
Debt Instrument [Line Items]
Carrying Value	$ 0
Face Value	0
Preferred Equity | Total fixed rate
Debt Instrument [Line Items]
Carrying Value	281,943
Face Value	$ 282,403
Minimum | Senior Mortgage Debt | Total fixed rate
Debt Instrument [Line Items]
Interest rate	3.00%
Minimum | Mezzanine Debt | Total fixed rate
Debt Instrument [Line Items]
Interest rate	2.90%
Minimum | Preferred Equity | Total fixed rate
Debt Instrument [Line Items]
Interest rate	6.50%
Maximum | Mezzanine Debt | Total fixed rate
Debt Instrument [Line Items]
Interest rate	14.30%
Maximum | Preferred Equity | Total fixed rate
Debt Instrument [Line Items]
Interest rate	11.00%
LIBOR | Minimum | Senior Mortgage Debt | Total floating rate
Debt Instrument [Line Items]
Basis spread on variable rate	3.50%
LIBOR | Minimum | Mezzanine Debt | Total floating rate
Debt Instrument [Line Items]
Basis spread on variable rate	4.95%
LIBOR | Maximum | Mezzanine Debt | Total floating rate
Debt Instrument [Line Items]
Basis spread on variable rate	12.57%

Debt and Preferred Equity Inv_5

Debt and Preferred Equity Investments - Rollforward of Total Allowance for Loan Loss Reserves (Details) $ in Thousands	3 Months Ended	12 Months Ended
	Mar. 31, 2022USD ($)loan	Dec. 31, 2021USD ($)
Loan loss reserve activity
Balance at beginning of year	$ 6,630	$ 13,213
Write-offs charged against the allowance	0	(6,583)
Balance at end of period	$ 6,630	$ 6,630
Number of financing receivables on non-accrual without allowance for loan loss | loan	1
Financing receivable on non-accrual without allowance	$ 225,400

Debt and Preferred Equity Inv_6

Debt and Preferred Equity Investments - Narrative (Details)	3 Months Ended	9 Months Ended
	Mar. 31, 2022USD ($)segmentinvestment	Sep. 30, 2021segment	Dec. 31, 2021USD ($)investment
Preferred equity investment
Number of investments, nonperforming | investment	2		2
Debt and preferred equity investments	$ 1,107,870,000		$ 1,088,723,000
Recorded investment, past due	$ 1,107,870,000		1,088,723,000
Number of portfolio segments of financial receivables (segment) | segment	1	1
Additional amount of financing receivables included in other assets	$ 10,400,000		10,500,000
Current period provision for loan loss	0
Financing Receivables, Equal to Greater than 90 Days Past Due
Preferred equity investment
Recorded investment, past due	0		0
Preferred equity investments
Preferred equity investment
Debt and preferred equity investments	281,943,000		273,006,000
Total floating rate
Preferred equity investment
Debt and preferred equity investments	302,128,000		294,970,000
Total floating rate | Mortgage/Mezzanine Loan
Preferred equity investment
Debt and preferred equity investments	223,100,000		223,100,000
Preferred equity investments | Preferred equity investments
Preferred equity investment
Debt and preferred equity investments	$ 6,800,000		$ 6,800,000

Debt and Preferred Equity Inv_7

Debt and Preferred Equity Investments - Investment In Financing Receivable (Details) - USD ($) $ in Thousands	Mar. 31, 2022	Dec. 31, 2021
Financing Receivable, Credit Quality Indicator [Line Items]
Carrying value	$ 1,107,870	$ 1,088,723
2022	0
2021	142,264
2020	288,212
Prior	677,394
1 - Low Risk Assets - Low probability of loss
Financing Receivable, Credit Quality Indicator [Line Items]
Carrying value	517,330	644,489
2022	0
2021	142,264
2020	153,055
Prior	222,011
2 - Watch List Assets - Higher potential for loss
Financing Receivable, Credit Quality Indicator [Line Items]
Carrying value	583,650	437,344
2022	0
2021	0
2020	135,157
Prior	448,493
3 - High Risk Assets - Loss more likely than not
Financing Receivable, Credit Quality Indicator [Line Items]
Carrying value	6,890	$ 6,890
2022	0
2021	0
2020	0
Prior	$ 6,890

Debt and Preferred Equity Inv_8

Debt and Preferred Equity Investments - Debt Investment (Details) - USD ($)	3 Months Ended
	Mar. 31, 2022	Dec. 31, 2021
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]
Aggregate weighted average current yield (as a percent)	6.65%
Debt Investments Held [Abstract]
Carrying Value	$ 1,107,870,000	$ 1,088,723,000
Carrying Value	1,107,870,000	1,088,723,000
Mezzanine Loan Due June 2024
Debt Investments Held [Abstract]
Amount participated out	12,000,000
Loan interest income	0
Mezzanine Loan Due March 2022
Debt Investments Held [Abstract]
Amount participated out	400,000
Debt Investments in Mortgage Loans
Debt Investments Held [Abstract]
Future Funding Obligations	60,212,000
Senior Financing	4,700,427,000
Allowance for loan loss	(6,630,000)	(6,630,000)
Carrying Value	825,927,000	815,717,000
Total fixed rate
Debt Investments Held [Abstract]
Future Funding Obligations	0
Senior Financing	2,937,108,000
Carrying Value	530,429,000	527,377,000
Total fixed rate | Mezzanine Loan Due August 2022
Debt Investments Held [Abstract]
Future Funding Obligations	0
Senior Financing	280,000,000
Carrying Value	44,182,000	43,521,000
Total fixed rate | Mortgage Loan Due April 2023
Debt Investments Held [Abstract]
Future Funding Obligations	0
Senior Financing	0
Carrying Value	73,000,000	73,000,000
Total fixed rate | Mezzanine Loan Due June 2023
Debt Investments Held [Abstract]
Future Funding Obligations	0
Senior Financing	382,473,000
Carrying Value	225,367,000	225,367,000
Total fixed rate | Mezzanine Loan Due June 2023, 2
Debt Investments Held [Abstract]
Future Funding Obligations	0
Senior Financing	276,885,000
Carrying Value	69,264,000	66,873,000
Total fixed rate | Mezzanine Loan Due June 2024
Debt Investments Held [Abstract]
Future Funding Obligations	0
Senior Financing	105,000,000
Carrying Value	13,366,000	13,366,000
Total fixed rate | Mezzanine Loan, with an Initial Maturity Date of January 2025
Debt Investments Held [Abstract]
Future Funding Obligations	0
Senior Financing	95,000,000
Carrying Value	30,000,000	30,000,000
Total fixed rate | Mezzanine Loan with an Initial Maturity Date of June 2027
Debt Investments Held [Abstract]
Future Funding Obligations	0
Senior Financing	1,712,750,000
Carrying Value	55,250,000	55,250,000
Total fixed rate | Mezzanine Loan With Initial Maturity Date of December 2029
Debt Investments Held [Abstract]
Future Funding Obligations	0
Senior Financing	85,000,000
Carrying Value	20,000,000	20,000,000
Total floating rate
Debt Investments Held [Abstract]
Future Funding Obligations	60,212,000
Senior Financing	1,763,319,000
Carrying Value	302,128,000	294,970,000
Total floating rate | Mezzanine Loan Due April 2022
Debt Investments Held [Abstract]
Future Funding Obligations	0
Senior Financing	275,000,000
Carrying Value	49,999,000	49,998,000
Total floating rate | Mezzanine Loan Due July 2022
Debt Investments Held [Abstract]
Future Funding Obligations	4,624,000
Senior Financing	181,536,000
Carrying Value	37,824,000	37,511,000
Total floating rate | Mezzanine Loan Due March 2022
Debt Investments Held [Abstract]
Future Funding Obligations	0
Senior Financing	1,115,000,000
Carrying Value	135,157,000	133,735,000
Total floating rate | Mortgage/Mezzanine Loan Due May 2022
Debt Investments Held [Abstract]
Future Funding Obligations	3,761,000
Senior Financing	54,000,000
Carrying Value	8,238,000	8,050,000
Total floating rate | Mezzanine Loan Due December 2022
Debt Investments Held [Abstract]
Future Funding Obligations	18,142,000
Senior Financing	0
Carrying Value	40,161,000	34,874,000
Total floating rate | Mezzanine Loan Due May 2023
Debt Investments Held [Abstract]
Future Funding Obligations	33,685,000
Senior Financing	137,783,000
Carrying Value	$ 30,749,000	$ 30,802,000

Debt and Preferred Equity Inv_9

Debt and Preferred Equity Investments - Preferred Equity Investments (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2022	Dec. 31, 2021
Preferred equity investment
Aggregate weighted average current yield (as a percent)	6.65%
Carrying Value	$ 1,107,870	$ 1,088,723
Preferred Equity, June 2022
Preferred equity investment
Future Funding Obligations	0
Senior Financing	1,712,750
Carrying Value	167,875	160,772
Preferred Equity, February 2027
Preferred equity investment
Future Funding Obligations	0
Senior Financing	250,000
Carrying Value	$ 114,068	112,234
Preferred equity investments
Preferred equity investment
Aggregate weighted average current yield (as a percent)	9.64%
Future Funding Obligations	$ 0
Senior Financing	1,962,750
Carrying Value	281,943	273,006
Allowance for loan loss	0	0
Total after allowance for loan loss	$ 281,943	$ 273,006

Investments in Unconsolidated_3

Investments in Unconsolidated Joint Ventures - Information about Joint Ventures (Details) $ in Thousands	12 Months Ended
	Dec. 31, 2020USD ($)	Apr. 30, 2022USD ($)	Mar. 31, 2022USD ($)ft²unitpartner	Dec. 31, 2021USD ($)
General information on each joint venture
Company's investments in unconsolidated joint ventures | $			$ 3,000,986	$ 2,997,934
Net equity investment in VIEs in which the entity is not primary beneficiary | $			$ 86,200	85,600
Unaudited Approximate Square Feet (sqft)			27,549,252
One Madison Avenue
General information on each joint venture
Ownership percentage deconsolidated	50.50%
Investment fair value adjustment | $	$ 187,500
Stonehenge Properties | Subsequent Event
General information on each joint venture
Gross Asset Valuation | $		$ 1,000
One Madison Avenue
General information on each joint venture
Investment in joint venture aggregate equity committed by partner | $	$ 492,200			$ 259,300
Investment in joint venture aggregate maximum ownership percentage	49.50%			25.00%
Investment in joint venture, number of partners | partner			2
Investment in joint venture, ownership percentage			39.20%
21 East 66th Street | Three Retail and Two Residential Units
General information on each joint venture
Ownership Interest			32.28%
Number of stores | unit			3
Number of residential units | unit			1
21 East 66th Street | Three Residential Units
General information on each joint venture
Ownership Interest			16.14%
Number of residential units | unit			2
Joint venture
General information on each joint venture
Company's investments in unconsolidated joint ventures | $			$ 3,000,986
Equity method investments with negative book value | $			$ 105,600
Joint venture | 100 Park Avenue
General information on each joint venture
Ownership Interest			49.90%
Economic Interest			49.90%
Unaudited Approximate Square Feet (sqft)			834,000
Joint venture | 717 Fifth Avenue
General information on each joint venture
Ownership Interest			10.92%
Economic Interest			10.92%
Unaudited Approximate Square Feet (sqft)			119,500
Joint venture | 800 Third Avenue
General information on each joint venture
Ownership Interest			60.52%
Economic Interest			60.52%
Unaudited Approximate Square Feet (sqft)			526,000
Joint venture | 919 Third Avenue
General information on each joint venture
Ownership Interest			51.00%
Economic Interest			51.00%
Unaudited Approximate Square Feet (sqft)			1,454,000
Joint venture | 11 West 34th Street
General information on each joint venture
Ownership Interest			30.00%
Economic Interest			30.00%
Unaudited Approximate Square Feet (sqft)			17,150
Joint venture | 280 Park Avenue
General information on each joint venture
Ownership Interest			50.00%
Economic Interest			50.00%
Unaudited Approximate Square Feet (sqft)			1,219,158
Joint venture | 1552-1560 Broadway
General information on each joint venture
Ownership Interest			50.00%
Economic Interest			50.00%
Unaudited Approximate Square Feet (sqft)			57,718
Joint venture | 10 East 53rd Street
General information on each joint venture
Ownership Interest			55.00%
Economic Interest			55.00%
Unaudited Approximate Square Feet (sqft)			354,300
Joint venture | 21 East 66th Street
General information on each joint venture
Ownership Interest			32.28%
Economic Interest			32.28%
Unaudited Approximate Square Feet (sqft)			13,069
Joint venture | 650 Fifth Avenue
General information on each joint venture
Ownership Interest			50.00%
Economic Interest			50.00%
Unaudited Approximate Square Feet (sqft)			69,214
Joint venture | 121 Greene Street
General information on each joint venture
Ownership Interest			50.00%
Economic Interest			50.00%
Unaudited Approximate Square Feet (sqft)			7,131
Joint venture | Stonehenge Properties
General information on each joint venture
Unaudited Approximate Square Feet (sqft)			1,439,016
Joint venture | 11 Madison Avenue
General information on each joint venture
Ownership Interest			60.00%
Economic Interest			60.00%
Unaudited Approximate Square Feet (sqft)			2,314,000
Joint venture | One Vanderbilt Avenue
General information on each joint venture
Ownership Interest			71.01%
Economic Interest			71.01%
Unaudited Approximate Square Feet (sqft)			1,657,198
Joint venture | Worldwide Plaza
General information on each joint venture
Ownership Interest			24.95%
Economic Interest			24.95%
Unaudited Approximate Square Feet (sqft)			2,048,725
Joint venture | 1515 Broadway
General information on each joint venture
Ownership Interest			56.87%
Economic Interest			56.87%
Unaudited Approximate Square Feet (sqft)			1,750,000
Joint venture | 2 Herald Square
General information on each joint venture
Ownership Interest			51.00%
Economic Interest			51.00%
Unaudited Approximate Square Feet (sqft)			369,000
Joint venture | 115 Spring Street
General information on each joint venture
Ownership Interest			51.00%
Economic Interest			51.00%
Unaudited Approximate Square Feet (sqft)			5,218
Joint venture | 15 Beekman
General information on each joint venture
Ownership Interest			20.00%
Economic Interest			20.00%
Unaudited Approximate Square Feet (sqft)			221,884
Joint venture | 85 Fifth Avenue
General information on each joint venture
Ownership Interest			36.27%
Economic Interest			36.27%
Unaudited Approximate Square Feet (sqft)			12,946
Joint venture | One Madison Avenue
General information on each joint venture
Ownership Interest			25.50%
Economic Interest			25.50%
Unaudited Approximate Square Feet (sqft)			1,048,700
Joint venture | 220 East 42nd Street
General information on each joint venture
Ownership Interest			51.00%
Economic Interest			51.00%
Unaudited Approximate Square Feet (sqft)			1,135,000

Investments in Unconsolidated_4

Investments in Unconsolidated Joint Ventures - Mortgages and Other Loans Payable (Details)	3 Months Ended
	Mar. 31, 2022USD ($)mortgageextensionpartner	Dec. 31, 2021USD ($)
Debt Instrument [Line Items]
Total fixed rate debt	$ 1,070,571,000	$ 1,073,409,000
Total floating rate debt	313,478,000	361,051,000
Total fixed rate and floating rate debt	1,384,049,000	1,434,460,000
Joint venture
Debt Instrument [Line Items]
Total fixed rate debt	8,210,815,000	8,216,666,000
Total floating rate debt	3,029,011,000	2,999,726,000
Total fixed rate and floating rate debt	11,239,826,000	11,216,392,000
Deferred financing costs, net	(121,491,000)	(130,516,000)
Total joint venture mortgages and other loans payable, net	$ 11,118,335,000	11,085,876,000
Joint venture | 717 Fifth Avenue
Debt Instrument [Line Items]
Economic Interest	10.92%
Joint venture | 717 Fifth Avenue | Mortgage loan
Debt Instrument [Line Items]
Interest rate, fixed rate debt (as a percent)	4.45%
Total fixed rate debt	$ 300,000,000	300,000,000
Joint venture | 717 Fifth Avenue | Mezzanine loans
Debt Instrument [Line Items]
Interest rate, fixed rate debt (as a percent)	5.50%
Total fixed rate debt	$ 355,328,000	355,328,000
Joint venture | 650 Fifth Avenue
Debt Instrument [Line Items]
Economic Interest	50.00%
Joint venture | 650 Fifth Avenue | Mortgage loan
Debt Instrument [Line Items]
Interest rate, fixed rate debt (as a percent)	4.46%
Total fixed rate debt	$ 210,000,000	210,000,000
Joint venture | 650 Fifth Avenue | Mezzanine loans
Debt Instrument [Line Items]
Interest rate, fixed rate debt (as a percent)	5.45%
Total fixed rate debt	$ 65,000,000	65,000,000
Joint venture | 21 East 66th Street
Debt Instrument [Line Items]
Economic Interest	32.28%
Interest rate, fixed rate debt (as a percent)	3.60%
Interest rate, floating rate debt (as a percent)	2.75%
Total fixed rate debt	$ 12,000,000	12,000,000
Total floating rate debt	$ 620,000	632,000
Joint venture | 919 Third Avenue
Debt Instrument [Line Items]
Economic Interest	51.00%
Interest rate, fixed rate debt (as a percent)	5.12%
Total fixed rate debt	$ 500,000,000	500,000,000
Joint venture | 1515 Broadway
Debt Instrument [Line Items]
Economic Interest	56.87%
Interest rate, fixed rate debt (as a percent)	3.93%
Total fixed rate debt	$ 796,929,000	801,845,000
Joint venture | 11 Madison Avenue
Debt Instrument [Line Items]
Economic Interest	60.00%
Interest rate, fixed rate debt (as a percent)	3.84%
Total fixed rate debt	$ 1,400,000,000	1,400,000,000
Joint venture | 800 Third Avenue
Debt Instrument [Line Items]
Economic Interest	60.52%
Interest rate, fixed rate debt (as a percent)	3.37%
Total fixed rate debt	$ 177,000,000	177,000,000
Joint venture | Worldwide Plaza
Debt Instrument [Line Items]
Economic Interest	24.95%
Interest rate, fixed rate debt (as a percent)	3.98%
Total fixed rate debt	$ 1,200,000,000	1,200,000,000
Joint venture | One Vanderbilt Avenue
Debt Instrument [Line Items]
Economic Interest	71.01%
Interest rate, fixed rate debt (as a percent)	2.95%
Total fixed rate debt	$ 3,000,000,000	3,000,000,000
Joint venture | Stonehenge Properties
Debt Instrument [Line Items]
Interest rate, fixed rate debt (as a percent)	3.50%
Total fixed rate debt	$ 194,558,000	195,493,000
Joint venture | 1552-1560 Broadway
Debt Instrument [Line Items]
Economic Interest	50.00%
Interest rate, floating rate debt (as a percent)	2.65%
Total floating rate debt	$ 193,132,000	193,132,000
Joint venture | 280 Park Avenue
Debt Instrument [Line Items]
Economic Interest	50.00%
Interest rate, floating rate debt (as a percent)	1.73%
Total floating rate debt	$ 1,200,000,000	1,200,000,000
Joint venture | 121 Greene Street
Debt Instrument [Line Items]
Economic Interest	50.00%
Interest rate, floating rate debt (as a percent)	2.00%
Total floating rate debt	$ 13,056,000	13,228,000
Joint venture | 2 Herald Square
Debt Instrument [Line Items]
Economic Interest	51.00%
Interest rate, floating rate debt (as a percent)	1.95%
Total floating rate debt	$ 199,664,000	200,989,000
Joint venture | 11 West 34th Street
Debt Instrument [Line Items]
Economic Interest	30.00%
Interest rate, floating rate debt (as a percent)	1.45%
Total floating rate debt	$ 23,000,000	23,000,000
Joint venture | 220 East 42nd Street
Debt Instrument [Line Items]
Economic Interest	51.00%
Interest rate, floating rate debt (as a percent)	2.75%
Total floating rate debt	$ 510,000,000	510,000,000
Joint venture | 115 Spring Street
Debt Instrument [Line Items]
Economic Interest	51.00%
Interest rate, floating rate debt (as a percent)	3.40%
Total floating rate debt	$ 65,550,000	65,550,000
Joint venture | 100 Park Avenue
Debt Instrument [Line Items]
Economic Interest	49.90%
Interest rate, floating rate debt (as a percent)	2.25%
Total floating rate debt	$ 360,000,000	360,000,000
Joint venture | 15 Beekman
Debt Instrument [Line Items]
Economic Interest	20.00%
Interest rate, floating rate debt (as a percent)	1.50%
Total floating rate debt	$ 50,805,000	43,566,000
Joint venture | 15 Beekman | Construction Loans
Debt Instrument [Line Items]
Maximum facility capacity	$ 125,000,000
Joint venture | 10 East 53rd Street
Debt Instrument [Line Items]
Economic Interest	55.00%
Interest rate, floating rate debt (as a percent)	1.35%
Total floating rate debt	$ 220,000,000	220,000,000
Joint venture | One Madison Avenue
Debt Instrument [Line Items]
Economic Interest	25.50%
Interest rate, floating rate debt (as a percent)	3.35%
Total floating rate debt	$ 193,184,000	$ 169,629,000
Joint venture | One Madison Avenue | Construction Loans
Debt Instrument [Line Items]
Maximum facility capacity	$ 1,250,000,000
Term (in Years)	5 years
Number of extension options | extension	1
Period of extension options	1 year
Secured Debt, Initial Maturity April 2028 | Joint venture | Stonehenge Properties
Debt Instrument [Line Items]
Total fixed rate debt	$ 131,600,000
Number of mortgages | partner	3
Secured Debt, Initial Maturity July 2029 | Joint venture | Stonehenge Properties
Debt Instrument [Line Items]
Total fixed rate debt	$ 63,000,000
Number of mortgages | mortgage	2

Investments in Unconsolidated_5

Investments in Unconsolidated Joint Ventures - Schedules of Combined Financial Statements for the Unconsolidated Joint Ventures (Details) - USD ($) $ in Thousands		3 Months Ended
		Mar. 31, 2022	Mar. 31, 2021	Dec. 31, 2021	Dec. 31, 2020
Assets
Commercial real estate property, net		$ 5,761,895		$ 5,754,708
Cash and restricted cash		223,674	$ 304,999	251,417
Tenant and other receivables, related party receivables, and deferred rents receivable		41,257		47,616
Other assets		308,960		262,841
Total assets	[1]	11,014,965		11,066,629
Liabilities and equity
Mortgages and other loans payable, net		1,344,775		1,394,386
Total lease liabilities excluding liabilities related to assets held for sale		852,194		851,370
Other liabilities		276,254		195,390
Equity		4,739,115	4,935,620	4,778,253	$ 4,935,795
Total liabilities and equity/capital		11,014,965		11,066,629
Company's investments in unconsolidated joint ventures		3,000,986		2,997,934
Investments difference between carrying amount and underlying equity		550,400
Combined statements of income for the unconsolidated joint ventures
Total revenues		187,964	226,102
Real estate taxes		30,747	45,411
Interest expense before capitalized interest		32,052	39,868
Amortization of deferred financing costs		1,948	3,774
Depreciation and amortization		46,983	62,996
Total expenses		168,699	207,499
Net income (loss)		13,485	(3,855)
Company's equity in net (loss) income from unconsolidated joint ventures		(4,715)	(2,864)
Joint venture
Assets
Commercial real estate property, net		14,785,274		14,763,874
Cash and restricted cash		751,944		768,510
Tenant and other receivables, related party receivables, and deferred rents receivable		562,483		533,455
Other assets		1,796,952		1,776,030
Total assets		17,896,653		17,841,869
Liabilities and equity
Mortgages and other loans payable, net		11,118,335		11,085,876
Deferred revenue		1,141,181		1,158,242
Total lease liabilities excluding liabilities related to assets held for sale		999,553		980,595
Other liabilities		368,957		352,499
Equity		4,268,627		4,264,657
Total liabilities and equity/capital		17,896,653		$ 17,841,869
Company's investments in unconsolidated joint ventures		3,000,986
Combined statements of income for the unconsolidated joint ventures
Total revenues		335,266	301,541
Operating expenses		59,914	46,233
Real estate taxes		60,722	54,592
Operating lease, rent		6,268	5,644
Interest expense before capitalized interest		94,913	78,749
Amortization of deferred financing costs		6,757	6,384
Depreciation and amortization		112,713	114,879
Total expenses		341,287	306,481
Net income (loss)		(6,021)	(4,940)
Company's equity in net (loss) income from unconsolidated joint ventures		(4,715)	(2,864)
Management Service, Base | Joint venture
Investment in Unconsolidated Joint Ventures
Management fees, base revenue		$ 6,200	$ 2,400
[1]	(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 $193.4 million of land, $291.2 million and $336.9 million of building and improvements, $— million and $— million of building and leasehold improvements, $15.4 million and $15.4 million of right of use assets, $11.5 million and $11.7 million of accumulated depreciation, $569.7 million and $574.4 million of other assets included in other line items, $372.5 million and $418.9 million of real estate debt, net, $0.8 million and $0.8 million of accrued interest payable, $15.3 million and $15.3 million of lease liabilities, and $226.4 million and $145.2 million of other liabilities included in other line items as of March 31, 2022 and December 31, 2021, respectively.

Deferred Costs (Details)

Deferred Costs (Details) - USD ($) $ in Thousands	Mar. 31, 2022	Dec. 31, 2021
Deferred Costs, Capitalized, Prepaid, and Other Assets Disclosure [Abstract]
Deferred leasing costs	$ 404,778	$ 400,419
Less: accumulated amortization	(282,484)	(275,924)
Deferred costs, net	$ 122,294	$ 124,495

Mortgages and Other Loans Pay_3

Mortgages and Other Loans Payable (Details)	1 Months Ended		3 Months Ended
	Oct. 31, 2021	Jun. 30, 2021	Mar. 31, 2022USD ($)extension	Dec. 31, 2021USD ($)	Apr. 30, 2018USD ($)	Mar. 31, 2017USD ($)
Debt Instrument [Line Items]
Total fixed rate debt			$ 1,070,571,000	$ 1,073,409,000
Total floating rate debt			313,478,000	361,051,000
Total fixed rate and floating rate debt			1,384,049,000	1,434,460,000
Mortgages reclassed to liabilities related to assets held for sale			(34,348,000)	(34,537,000)
Total mortgages and other loans payable			1,349,701,000	1,399,923,000
Deferred financing costs, net of amortization			(4,926,000)	(5,537,000)
Total mortgages and other loans payable, net			1,344,775,000	1,394,386,000
Outstanding under line of credit facility			491,998,000	381,334,000
Book value of collateral			1,900,000,000	2,100,000,000
2017 Master Repurchase Agreement
Debt Instrument [Line Items]
Total floating rate debt			0	0
Maximum facility capacity			400,000,000		$ 400,000,000	$ 300,000,000
Extension option exercised, term		1 year
Outstanding under line of credit facility			0
100 Church Street
Debt Instrument [Line Items]
Total fixed rate debt			$ 198,980,000	200,212,000
100 Church Street | Weighted Average
Debt Instrument [Line Items]
Interest rate, fixed rate debt (as a percent)			4.68%
420 Lexington Avenue
Debt Instrument [Line Items]
Total fixed rate debt			$ 287,243,000	288,660,000
420 Lexington Avenue | Weighted Average
Debt Instrument [Line Items]
Interest rate, fixed rate debt (as a percent)			3.99%
Landmark Square
Debt Instrument [Line Items]
Total fixed rate debt			$ 100,000,000	100,000,000
Landmark Square | Weighted Average
Debt Instrument [Line Items]
Interest rate, fixed rate debt (as a percent)			4.90%
485 Lexington Avenue
Debt Instrument [Line Items]
Total fixed rate debt			$ 450,000,000	450,000,000
485 Lexington Avenue | Weighted Average
Debt Instrument [Line Items]
Interest rate, fixed rate debt (as a percent)			4.25%
1080 Amsterdam Avenue
Debt Instrument [Line Items]
Total fixed rate debt			$ 34,348,000	34,537,000
Total fixed rate debt			33,400,000
Subordinate loan			$ 900,000
1080 Amsterdam Avenue | Weighted Average
Debt Instrument [Line Items]
Interest rate, fixed rate debt (as a percent)			3.59%
1080 Amsterdam Avenue | Mortgage loan | Weighted Average
Debt Instrument [Line Items]
Interest rate, fixed rate debt (as a percent)			3.50%
Interest rate period			5 years
1080 Amsterdam Avenue | Subordinate loan | Weighted Average
Debt Instrument [Line Items]
Interest rate, fixed rate debt (as a percent)			7.00%
7 Dey / 185 Broadway
Debt Instrument [Line Items]
Total floating rate debt			$ 203,478,000	198,169,000
7 Dey / 185 Broadway | Weighted Average
Debt Instrument [Line Items]
Interest rate, floating rate debt (as a percent)			2.85%
719 Seventh Avenue
Debt Instrument [Line Items]
Total floating rate debt			$ 50,000,000	50,000,000
719 Seventh Avenue | Weighted Average
Debt Instrument [Line Items]
Interest rate, floating rate debt (as a percent)			1.20%
690 Madison Avenue
Debt Instrument [Line Items]
Total floating rate debt			$ 60,000,000	60,000,000
690 Madison Avenue | Weighted Average
Debt Instrument [Line Items]
Interest rate, floating rate debt (as a percent)			1.50%
609 Fifth Avenue
Debt Instrument [Line Items]
Total floating rate debt			$ 0	$ 52,882,000
609 Fifth Avenue | Weighted Average
Debt Instrument [Line Items]
Interest rate, floating rate debt (as a percent)			0.00%
Construction Loans | 185 Broadway
Debt Instrument [Line Items]
Maximum facility capacity			$ 225,000,000
Term (in Years)			3 years
Number of extension options | extension			2
Period of extension options	1 year		1 year

Corporate Indebtedness - Additi

Corporate Indebtedness - Additional Information (Details)	3 Months Ended
	Mar. 31, 2022USD ($)extension	Dec. 31, 2021USD ($)
Corporate Indebtedness
Revolving credit facility, net	$ 491,998,000	$ 381,334,000
Term Loan A, Maturity May 2026 | Term Loan
Corporate Indebtedness
Maximum facility capacity	$ 1,050,000,000
Term Loan A, Maturity May 2026 | LIBOR | Term Loan
Corporate Indebtedness
Interest rate added to base rate (as a percent)	1.20%
Term Loan A, Maturity May 2026 | LIBOR | Minimum | Term Loan
Corporate Indebtedness
Interest rate added to base rate (as a percent)	0.80%
Term Loan A, Maturity May 2026 | LIBOR | Maximum | Term Loan
Corporate Indebtedness
Interest rate added to base rate (as a percent)	1.60%
Term Loan B, Maturity November 2024 | Term Loan
Corporate Indebtedness
Maximum facility capacity	$ 200,000,000
Term Loan B, Maturity November 2024 | LIBOR | Term Loan
Corporate Indebtedness
Interest rate added to base rate (as a percent)	1.25%
Term Loan B, Maturity November 2024 | LIBOR | Minimum | Term Loan
Corporate Indebtedness
Interest rate added to base rate (as a percent)	0.85%
Term Loan B, Maturity November 2024 | LIBOR | Maximum | Term Loan
Corporate Indebtedness
Interest rate added to base rate (as a percent)	1.65%
Revolving Credit Facility
Corporate Indebtedness
Facility fee (as a percent)	0.20%
Revolving credit facility, net	$ 500,000,000
Revolving Credit Facility | Minimum
Corporate Indebtedness
Facility fee (as a percent)	0.125%
Revolving Credit Facility | Maximum
Corporate Indebtedness
Facility fee (as a percent)	0.30%
Term Loan
Corporate Indebtedness
Long-term debt, carrying value	$ 1,250,000,000
Term Loan | Line of Credit
Corporate Indebtedness
Long-term debt, carrying value	1,200,000,000	1,200,000,000
2012 Credit Facility
Corporate Indebtedness
Letters of credit	2,000,000
Ability to borrow under line of credit facility	750,000,000
2012 Credit Facility | Line of Credit
Corporate Indebtedness
Long-term debt, carrying value	$ 492,000,000	$ 381,300,000
Revolving Credit Facility | SOFR | Line of Credit
Corporate Indebtedness
Interest rate added to base rate (as a percent)	0.10%
Revolving Credit Facility | Revolving Credit Facility, Maturity May 2026 | Line of Credit
Corporate Indebtedness
Maximum facility capacity	$ 1,250,000,000
Number of extensions | extension	2
Term of extension	6 months
Maximum borrowing capacity, optional expansion	$ 4,500,000,000
Revolving Credit Facility | Revolving Credit Facility, Maturity May 2026 | LIBOR | Line of Credit
Corporate Indebtedness
Interest rate added to base rate (as a percent)	1.05%
Revolving Credit Facility | Revolving Credit Facility, Maturity May 2026 | LIBOR | Minimum | Line of Credit
Corporate Indebtedness
Interest rate added to base rate (as a percent)	0.725%
Revolving Credit Facility | Revolving Credit Facility, Maturity May 2026 | LIBOR | Maximum | Line of Credit
Corporate Indebtedness
Interest rate added to base rate (as a percent)	1.40%

Corporate Indebtedness - Senior

Corporate Indebtedness - Senior Unsecured Notes (Details) - USD ($)	1 Months Ended	3 Months Ended
	Oct. 31, 2017	Mar. 31, 2022	Dec. 31, 2021
Debt disclosures by scheduled maturity date
Accreted Balance		$ 1,242,345,000	$ 1,242,002,000
Senior unsecured notes
Debt disclosures by scheduled maturity date
Unpaid Principal Balance		900,000,000
Accreted Balance		900,668,000	900,915,000
Deferred financing costs, net		(1,127,000)	(1,607,000)
Accreted Balance, net of deferred financing costs		899,541,000	899,308,000
Senior unsecured notes | 3.25 Percent Senior Unsecured Notes Due October 2022
Debt disclosures by scheduled maturity date
Unpaid Principal Balance		500,000,000
Accreted Balance		$ 499,940,000	499,913,000
Coupon Rate (as a percent)		3.25%
Initial Term (in Years)		5 years
Senior unsecured notes | 4.50% Senior unsecured notes maturing on December 1, 2022
Debt disclosures by scheduled maturity date
Unpaid Principal Balance		$ 300,000,000
Accreted Balance		$ 300,728,000	301,002,000
Coupon Rate (as a percent)	4.50%	4.50%
Initial Term (in Years)		10 years
Face amount of loan	$ 100,000,000
Redemption price, percentage	105.334%
Senior unsecured notes | 4.27% Senior unsecured notes maturing on December 17, 2025
Debt disclosures by scheduled maturity date
Unpaid Principal Balance		$ 100,000,000
Accreted Balance		$ 100,000,000	$ 100,000,000
Coupon Rate (as a percent)		4.27%
Initial Term (in Years)		10 years

Corporate Indebtedness - Junior

Corporate Indebtedness - Junior Subordinated Deferrable Interest Debentures and Principal Maturities (Details)	1 Months Ended	3 Months Ended
	Jun. 30, 2005USD ($)	Mar. 31, 2022USD ($)quarter
Principal Repayments and Joint Venture Debt
Remaining 2022		$ 1,207,223,000
2023		56,640,000
2024		538,077,000
2025		100,873,000
2026		500,904,000
Thereafter		1,730,332,000
Total principal repayments		$ 4,134,049,000
Trust Preferred Securities
Debt Instrument [Line Items]
Proceeds from issuance of debt	$ 100,000,000
LIBOR | Trust Preferred Securities
Debt Instrument [Line Items]
Interest rate added to base rate (as a percent)		1.25%
Interest payment deferment, number of consecutive quarters | quarter		8
Joint venture
Principal Repayments and Joint Venture Debt
Remaining 2022		$ 422,442,000
2023		750,696,000
2024		626,671,000
2025		1,431,734,000
2026		107,230,000
Thereafter		2,435,913,000
Total principal repayments		5,774,686,000
Joint venture | Trust Preferred Securities
Principal Repayments and Joint Venture Debt
Remaining 2022		0
2023		0
2024		0
2025		0
2026		0
Thereafter		100,000,000
Total principal repayments		100,000,000
Joint venture | Mortgages and other loans payable
Scheduled Amortization
Remaining 2022		5,962,000
2023		6,640,000
2024		5,328,000
2025		873,000
2026		904,000
Thereafter		75,000
Total amortization of debt		19,782,000
Principal Repayments and Joint Venture Debt
Remaining 2022		401,261,000
2023		50,000,000
2024		332,749,000
2025		0
2026		0
Thereafter		580,257,000
Total principal repayments		1,364,267,000
Joint venture | Revolving Credit Facility
Principal Repayments and Joint Venture Debt
Remaining 2022		0
2023		0
2024		0
2025		0
2026		500,000,000
Thereafter		0
Total principal repayments		500,000,000
Joint venture | Unsecured Term Loans
Principal Repayments and Joint Venture Debt
Remaining 2022		0
2023		0
2024		200,000,000
2025		0
2026		0
Thereafter		1,050,000,000
Total principal repayments		1,250,000,000
Joint venture | Senior Unsecured Notes
Principal Repayments and Joint Venture Debt
Remaining 2022		800,000,000
2023		0
2024		0
2025		100,000,000
2026		0
Thereafter		0
Total principal repayments		$ 900,000,000

Corporate Indebtedness - Schedu

Corporate Indebtedness - Schedule of Consolidated Interest Expense, Excluding Capitalized Interest (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021
Interest expense
Interest expense before capitalized interest	$ 32,052	$ 39,868
Interest on financing leases	1,237	1,492
Interest capitalized	(17,941)	(17,583)
Interest income	(278)	(389)
Interest expense, net	$ 15,070	$ 23,388

Related Party Transactions (Det

Related Party Transactions (Details) - USD ($) $ in Thousands	1 Months Ended	3 Months Ended
	Dec. 31, 2016	Mar. 31, 2022	Mar. 31, 2021	Dec. 31, 2021
Related Party Transactions
Payments made for services		$ 2,523	$ 2,225
Operating lease rent		6,564	6,739
Rental revenue, net		156,031	188,089
Amounts due from/to related parties
Due from joint ventures		31,001		$ 28,204
Other		710		1,204
Related party receivables		31,711		$ 29,408
Alliance Building Services
Related Party Transactions
Profit participation from related party		700	300
Payments made for services		4,300	2,300
Entity with Stephen L Green ownership interest
Related Party Transactions
Property management fees from related party		200	100
One Vanderbilt Avenue
Related Party Transactions
Operating lease rent		700	$ 100
One Vanderbilt Avenue | Marc Holliday
Related Party Transactions
Due from related party		1,400
One Vanderbilt Avenue | Andrew Mathias
Related Party Transactions
Due from related party		$ 1,000
One Vanderbilt Avenue | Affiliated Entity | Holiday And Mathias
Related Party Transactions
Stabilization of property, within three years after stabilization, percent		50.00%
Stabilization of property, three years or more after stabilization, percent		100.00%
Stabilization of property, anniversary period		7 years
One Vanderbilt Avenue | Minimum | Marc Holliday
Related Party Transactions
Percentage of profits due to investors (as a percentage)	1.50%
One Vanderbilt Avenue | Minimum | Andrew Mathias
Related Party Transactions
Percentage of profits due to investors (as a percentage)	1.00%
One Vanderbilt Avenue | Maximum | Marc Holliday
Related Party Transactions
Percentage of profits due to investors (as a percentage)	1.80%
One Vanderbilt Avenue | Maximum | Andrew Mathias
Related Party Transactions
Percentage of profits due to investors (as a percentage)	1.20%
SUMMIT One Vanderbilt
Related Party Transactions
Operating lease rent		$ 9,800
Rental revenue, net		$ 6,600

Noncontrolling Interests on t_3

Noncontrolling Interests on the Company's Consolidated Financial Statements - Additional Information (Details) $ / shares in Units, $ in Thousands	3 Months Ended		12 Months Ended
	Mar. 31, 2022USD ($)shares$ / shares	Mar. 31, 2021USD ($)	Dec. 31, 2021USD ($)shares
Rollforward analysis of the activity relating to the noncontrolling interests in the operating partnership
Net income | $	$ 492	$ (476)
Accumulated other comprehensive loss allocation | $	$ 2,277	2,655
SL Green Operating Partnership
Organization
Number of units of operating partnership owned by the noncontrolling interest unit holders (shares)	4,095,291		3,781,565
Shares of common stock reserved for issuance upon redemption of units of limited partnership interest in operating partnership (shares)	4,095,291
Rollforward analysis of the activity relating to the noncontrolling interests in the operating partnership
Accumulated other comprehensive loss allocation | $	$ 2,277	2,655
SL Green Operating Partnership | 3.50% Series A
Rollforward analysis of the activity relating to the noncontrolling interests in the operating partnership
Stated Distribution Rate	3.50%
Number of Units Authorized (in shares)	109,161
Number of Units Issued (in shares)	109,161
Number of Units Outstanding (in shares)	109,161
Annual Dividend Per Unit (in dollars per share) | $ / shares	$ 35
Liquidation Preference Per Unit (in dollars per share) | $ / shares	1,000
Conversion Price Per Unit (in dollars per share) | $ / shares	$ 0
Number of company common stock issued on conversion of Series B preferred units	6.71348
SL Green Operating Partnership | Series F
Rollforward analysis of the activity relating to the noncontrolling interests in the operating partnership
Stated Distribution Rate	700.00%
Number of Units Authorized (in shares)	60
Number of Units Issued (in shares)	60
Number of Units Outstanding (in shares)	60
Annual Dividend Per Unit (in dollars per share) | $ / shares	$ 70
Liquidation Preference Per Unit (in dollars per share) | $ / shares	1,000
Conversion Price Per Unit (in dollars per share) | $ / shares	$ 29.12
SL Green Operating Partnership | Series K
Rollforward analysis of the activity relating to the noncontrolling interests in the operating partnership
Stated Distribution Rate	350.00%
Number of Units Authorized (in shares)	700,000
Number of Units Issued (in shares)	563,954
Number of Units Outstanding (in shares)	341,677
Annual Dividend Per Unit (in dollars per share) | $ / shares	$ 0.8750
Liquidation Preference Per Unit (in dollars per share) | $ / shares	25
Conversion Price Per Unit (in dollars per share) | $ / shares	$ 134.67
SL Green Operating Partnership | Series L
Rollforward analysis of the activity relating to the noncontrolling interests in the operating partnership
Stated Distribution Rate	400.00%
Number of Units Authorized (in shares)	500,000
Number of Units Issued (in shares)	378,634
Number of Units Outstanding (in shares)	372,634
Annual Dividend Per Unit (in dollars per share) | $ / shares	$ 1
Liquidation Preference Per Unit (in dollars per share) | $ / shares	25
Conversion Price Per Unit (in dollars per share) | $ / shares	$ 0
SL Green Operating Partnership | Series P
Rollforward analysis of the activity relating to the noncontrolling interests in the operating partnership
Stated Distribution Rate	400.00%
Number of Units Authorized (in shares)	200,000
Number of Units Issued (in shares)	200,000
Number of Units Outstanding (in shares)	200,000
Annual Dividend Per Unit (in dollars per share) | $ / shares	$ 1
Liquidation Preference Per Unit (in dollars per share) | $ / shares	25
Conversion Price Per Unit (in dollars per share) | $ / shares	$ 0
SL Green Operating Partnership | Series Q
Rollforward analysis of the activity relating to the noncontrolling interests in the operating partnership
Stated Distribution Rate	350.00%
Number of Units Authorized (in shares)	268,000
Number of Units Issued (in shares)	268,000
Number of Units Outstanding (in shares)	268,000
Annual Dividend Per Unit (in dollars per share) | $ / shares	$ 0.8750
Liquidation Preference Per Unit (in dollars per share) | $ / shares	25
Conversion Price Per Unit (in dollars per share) | $ / shares	$ 148.95
SL Green Operating Partnership | Series R
Rollforward analysis of the activity relating to the noncontrolling interests in the operating partnership
Stated Distribution Rate	350.00%
Number of Units Authorized (in shares)	400,000
Number of Units Issued (in shares)	400,000
Number of Units Outstanding (in shares)	400,000
Annual Dividend Per Unit (in dollars per share) | $ / shares	$ 0.8750
Liquidation Preference Per Unit (in dollars per share) | $ / shares	25
Conversion Price Per Unit (in dollars per share) | $ / shares	$ 154.89
SL Green Operating Partnership | Series S
Rollforward analysis of the activity relating to the noncontrolling interests in the operating partnership
Stated Distribution Rate	400.00%
Number of Units Authorized (in shares)	1,077,280
Number of Units Issued (in shares)	1,077,280
Number of Units Outstanding (in shares)	1,077,280
Annual Dividend Per Unit (in dollars per share) | $ / shares	$ 1
Liquidation Preference Per Unit (in dollars per share) | $ / shares	25
Conversion Price Per Unit (in dollars per share) | $ / shares	$ 0
SL Green Operating Partnership | Series V
Rollforward analysis of the activity relating to the noncontrolling interests in the operating partnership
Stated Distribution Rate	350.00%
Number of Units Authorized (in shares)	40,000
Number of Units Issued (in shares)	40,000
Number of Units Outstanding (in shares)	40,000
Annual Dividend Per Unit (in dollars per share) | $ / shares	$ 0.8750
Liquidation Preference Per Unit (in dollars per share) | $ / shares	25
Conversion Price Per Unit (in dollars per share) | $ / shares	$ 0
SL Green Operating Partnership | Series W
Rollforward analysis of the activity relating to the noncontrolling interests in the operating partnership
Number of Units Authorized (in shares)	1
Number of Units Issued (in shares)	1
Number of Units Outstanding (in shares)	1
Preferred stock, dividend, multiplier per common unit distribution	1,350
Partnership Interest
Rollforward analysis of the activity relating to the noncontrolling interests in the operating partnership
Balance at beginning of period | $	$ 344,252	$ 358,262	$ 358,262
Distributions | $	(4,415)		(15,749)
Issuance of common units | $	6,721		18,678
Redemption and conversion of common units | $	(18,272)		(53,289)
Net income | $	492		25,457
Accumulated other comprehensive loss allocation | $	2,277		1,042
Fair value adjustment | $	43,023		9,851
Balance at end of period | $	$ 374,078		$ 344,252
Operating Partnership | SL Green Operating Partnership
Organization
Noncontrolling interest in the operating partnership (as a percent)	6.00%		5.57%

Noncontrolling Interests on t_4

Noncontrolling Interests on the Company's Consolidated Financial Statements - Common Unit Activity (Details) - SL Green Operating Partnership - Preferred Units - USD ($) $ in Thousands	3 Months Ended	12 Months Ended
	Mar. 31, 2022	Dec. 31, 2021
Rollforward Analysis of Preferred Unit Activity
Balance at beginning of period	$ 196,075	$ 202,169
Issuance of preferred units	0	0
Redemption of preferred units	(17,967)	(6,040)
Dividends paid on preferred units	(1,662)	(6,760)
Accrued dividends on preferred units	1,497	6,706
Balance at end of period	$ 177,943	$ 196,075

Stockholders' Equity of the C_3

Stockholders' Equity of the Company - Additional Information (Details)	Jan. 18, 2022$ / sharesshares	Jan. 10, 2022	Jan. 07, 2022$ / shares	Dec. 02, 2021$ / shares	Mar. 31, 2022$ / sharesshares	Mar. 31, 2021$ / sharesshares	Dec. 31, 2021$ / sharesshares	Dec. 31, 2020shares
Equity, Class of Treasury Stock [Line Items]
Authorized capital stock (shares) | shares					260,000,000
Authorized shares, par value (in dollars per share)					$ 0.01
Common stock, shares authorized (in shares) | shares					160,000,000		160,000,000
Common stock, par value (in dollars per share)					$ 0.01		$ 0.01
Excess stock, shares authorized (shares) | shares					75,000,000
Excess stock, par value (in dollars per share)					$ 0.01
Preferred stock, shares authorized (shares) | shares					25,000,000
Preferred stock, par value (in dollars per share)					$ 0.01
Excess shares issued (shares) | shares					0
Cash distribution declared, per common share (in dollars per share)					$ 0.932	$ 0.938
Volume weighted average share price (in dollars per share)			$ 79.71
Shareholder Election, Cash Option Subject to Proration
Equity, Class of Treasury Stock [Line Items]
Common stock, dividends, per share, cash paid (in dollars per share)	$ 0.3976
Common stock, dividends, per share, stock issued (in shares) | shares	0.0295
Shareholder Election, Stock Option
Equity, Class of Treasury Stock [Line Items]
Common stock, dividends, per share, stock issued (in shares) | shares	0.0345
Ordinary Dividend
Equity, Class of Treasury Stock [Line Items]
Cash distribution declared, per common share (in dollars per share)				$ 0.3108
Special Dividend
Equity, Class of Treasury Stock [Line Items]
Cash distribution declared, per common share (in dollars per share)				$ 2.4392
Common Stock
Equity, Class of Treasury Stock [Line Items]
Shares, outstanding (in shares) | shares					64,124,000	67,296,000	64,105,000	66,474,000
Reverse stock split conversion ratio		1.03060
SL Green Operating Partnership
Equity, Class of Treasury Stock [Line Items]
Cash distribution declared, per common share (in dollars per share)					$ 0.932	$ 0.938
SL Green Operating Partnership | Common Stock
Equity, Class of Treasury Stock [Line Items]
Shares, outstanding (in shares) | shares					64,124,447

Stockholders' Equity of the C_4

Stockholders' Equity of the Company - Share Repurchase Program (Details)	3 Months Ended	12 Months Ended
	Mar. 31, 2022USD ($)increase$ / sharesshares	Dec. 31, 2021USD ($)$ / sharesshares	Dec. 31, 2020USD ($)$ / sharesshares	Dec. 31, 2019USD ($)$ / sharesshares	Dec. 31, 2018USD ($)$ / sharesshares	Dec. 31, 2017$ / sharesshares	Aug. 31, 2016USD ($)
Class of Stock [Line Items]
Share repurchased (in shares) | shares	1,971,092	4,474,649	8,276,032	4,333,260	9,187,480	7,865,206
Average price paid per share (in dollars per share) | $ / shares	$ 76.69	$ 75.44	$ 64.30	$ 88.69	$ 102.06	$ 107.81
2016 Repurchase Program
Class of Stock [Line Items]
Stock repurchase program, authorized amount | $		$ 500,000,000	$ 500,000,000	$ 500,000,000	$ 500,000,000		$ 1,000,000,000
Number of increases to share repurchase program | increase	5
Stock repurchase program, authorized amount | $	$ 3,500,000,000
Share repurchased (in shares) | shares	36,107,719	34,136,627	29,661,978	21,385,946	17,052,686	7,865,206

Stockholders' Equity of the C_5

Stockholders' Equity of the Company - Perpetual Preferred Stock (Details) - USD ($) $ / shares in Units, $ in Millions	1 Months Ended	3 Months Ended
	Aug. 31, 2012	Mar. 31, 2022	Dec. 31, 2021	Feb. 28, 2021
Stockholders' Equity
Common stock, shares authorized (in shares)		160,000,000	160,000,000
Series I Preferred Stock
Stockholders' Equity
Preferred stock, shares outstanding (in shares)		9,200,000	9,200,000
Preferred stock, distribution rate		6.50%
Perpetual preferred stock, liquidation preference (in dollars per share)		$ 25	$ 25
Perpetual preferred stock, annual dividends per share (in dollars per share)		$ 1.625
Contributions of net proceeds from sale of preferred stock	$ 221.9
Dividend Reinvestment and Stock Purchase Plan (DRIP)
Stockholders' Equity
Common stock, shares authorized (in shares)				3,500,000

Stockholders' Equity of the C_6

Stockholders' Equity of the Company - Schedule of Common Stock Issued and Proceeds Received Dividend Reinvestments (Details) - Dividend Reinvestment and Stock Purchase Plan (DRIP) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021
Stockholders' Equity
Shares of common stock issued (in shares)	1,132	5,320
Dividend reinvestments/stock purchases under the DRSPP	$ 89	$ 351

Stockholders' Equity of the C_7

Stockholders' Equity of the Company - Earnings per Share (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021
Basic Earnings:
Income attributable to SL Green common stockholders	$ 7,751	$ (7,464)
Less: distributed earnings allocated to participating securities	(335)	(364)
Net Income attributable to common unitholders (numerator for basic earnings per unit)	7,416	(7,828)
Effect of Dilutive Securities:
Add back: dilutive effect of earnings allocated to participating securities and contingently issuable shares	(96)	7
Redemption of units to common shares	492	(476)
Diluted Earnings:
Income attributable to SL Green common stockholders	$ 7,812	$ (8,297)
Basic Shares:
Weighted average common shares outstanding (shares)	64,349,000	66,961,000
Effect of Dilutive Securities:
Operating Partnership units redeemable for common shares (shares)	4,121,000	4,148,000
Stock-based compensation plans (shares)	984,000	588,000
Contingently issuable shares from special dividend declared December 4, 2020 (in shares)	774,000	307,000
Diluted weighted average common stock outstanding (shares)	70,228,000	72,004,000
Common stock shares excluded from the diluted shares outstanding (shares)	351,927	1,124,920

Partners' Capital of the Oper_3

Partners' Capital of the Operating Partnership - Additional Information (Details) - shares	3 Months Ended
	Mar. 31, 2022	Dec. 31, 2021	Mar. 31, 2021	Dec. 31, 2020
Common Stock
Stockholders' Equity
Units outstanding (units)	64,124,000	64,105,000	67,296,000	66,474,000
SL Green Operating Partnership
Stockholders' Equity
Number of units of operating partnership owned by the noncontrolling interest unit holders (units)	4,095,291	3,781,565
SL Green Operating Partnership | Common Stock
Stockholders' Equity
Units outstanding (units)	64,124,447
SL Green Operating Partnership | Series I Preferred Units
Stockholders' Equity
Units outstanding (units)	9,200,000
Period of restriction to redeem OP Units	1 year
Conversion of stock, shares issued	1

Partners' Capital of the Oper_4

Partners' Capital of the Operating Partnership - EPS (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021
Numerator
Less: distributed earnings allocated to participating securities	$ (335)	$ (364)
Net Income attributable to common unitholders (numerator for basic earnings per unit)	7,416	(7,828)
Add back: dilutive effect of earnings allocated to participating securities	96	(7)
Income attributable to SL Green common stockholders	$ 7,812	$ (8,297)
Denominator
Common stock shares excluded from the diluted shares outstanding (shares)	351,927	1,124,920
SL Green Operating Partnership
Numerator
Net income attributable to SLGOP common unitholders	$ 8,243	$ (7,940)
Less: distributed earnings allocated to participating securities	(335)	(364)
Net Income attributable to common unitholders (numerator for basic earnings per unit)	7,908	(8,304)
Add back: dilutive effect of earnings allocated to participating securities	(96)	7
Income attributable to SL Green common stockholders	$ 7,812	$ (8,297)
Denominator
Basic weighted average common units outstanding (in shares)	68,470,000	71,109,000
Stock-based compensation plans (shares)	984,000	588,000
Contingently issuable units (in shares)	774,000	307,000
Diluted weighted average common units outstanding (shares)	70,228,000	72,004,000
Common stock shares excluded from the diluted shares outstanding (shares)	351,927

Share-based Compensation - Addi

Share-based Compensation - Additional Information (Details)	3 Months Ended		12 Months Ended
	Mar. 31, 2022USD ($)unit / sharesfungibleUnitunitshares	Mar. 31, 2021USD ($)	Dec. 31, 2021USD ($)shares	Apr. 30, 2022fungibleUnit	Dec. 31, 2020shares	Jan. 01, 2008shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Capitalized to assets associated with compensation expense related to our long-term compensation plans, restricted stock and stock options	$ 300,000	$ 500,000
Stock options
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Period of commencement of option vesting, from date of grant (in years)	1 year
Options granted (in shares) | shares	0		0
Remaining weighted average contractual life of the options outstanding (in years)	2 years 3 months 18 days
Remaining average contractual life of the options exercisable (in years)	2 years 3 months 18 days
Stock options | Minimum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Award expiration period (in years)	5 years
Options vesting period (in years)	1 year
Stock options | Maximum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Award expiration period (in years)	10 years
Options vesting period (in years)	5 years
Class O LTIP Units
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Preferred unit distributions as a percentage of common unit distributions	10.00%
Restricted Stock Awards
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Compensation expense	$ 1,920,738		$ 8,497,054
Total unrecognized compensation cost related to unvested stock awards	$ 10,300,000
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	$ 9,600,000		11,300,000
Weighted average period for recognition of compensation cost related to unvested stock awards (in years)	1 year 6 months
Weighted average fair value of options granted during the period	$ 5,931,470		$ 9,214,531
Awards granted (in shares) | shares	77,148		141,515
Awards outstanding (in shares) | shares	3,527,436		3,459,363		3,337,545
LTIP units
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Weighted average fair value of options granted during the period	$ 38,600,000		$ 55,000,000
Performance Shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Compensation expense	10,200,000	9,100,000
Total unrecognized compensation cost related to unvested stock awards	$ 72,800,000
Weighted average period for recognition of compensation cost related to unvested stock awards (in years)	1 year 10 months 24 days
All other awards
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Expected term	10 years
Third Amendment and Restated 2005 Stock Option and Incentive Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Maximum fungible units that may be granted (in shares) | unit	27,030,000
Fungible units per share (in fungible units per share) | unit / shares	3.74
Shares that may be issued if equal to fungible units (shares) (less than) | shares	27,030,000
Fungible units | fungibleUnit	200,000
Third Amendment and Restated 2005 Stock Option and Incentive Plan | Subsequent Event
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share Based Compensation Arrangement by Share-Based Payment Award, Number of Additional Fungible Units Authorized | fungibleUnit				5,180,000
Third Amendment and Restated 2005 Stock Option and Incentive Plan | Stock options
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Compensation expense	$ 0	0
Total unrecognized compensation cost related to unvested stock awards	$ 0
Stock options, stock appreciation rights and other awards
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Fungible units per share (in fungible units per share) | unit / shares	0.73
Award expiration period (in years)	5 years
All other awards
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Fungible units per share (in fungible units per share) | unit / shares	1
Deferred Stock Compensation Plan for Directors
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Compensation expense	$ 1,800,000	$ 1,800,000
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) | shares	14,261
Shares issued (in shares) | shares	9,207
Awards outstanding (in shares) | shares	179,462
Employee Stock Purchase Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares of common stock available for issuance (shares) | shares						500,000
Duration of each offering period starting the first day of each calendar quarter (in months)	3 months
Discount from market price	85.00%
Shares of common stock issued (shares) | shares	176,385

Share-based Compensation - Stoc

Share-based Compensation - Stock Options and Restricted Stock Activity (Details) - USD ($)	3 Months Ended	12 Months Ended
	Mar. 31, 2022	Dec. 31, 2021
Stock options
Options Outstanding
Balance at beginning of period (in shares)	394,089	761,686
Exercised (in shares)	0	(11,314)
Lapsed or canceled (in shares)	(28,283)	(356,283)
Balance at end of period (in shares)	365,806	394,089
Options exercisable at end of period (in shares)	365,806	394,089
Weighted Average Exercise Price
Balance at beginning of year (in dollars per share)	$ 100.56	$ 105.76
Exercised (in dollars per share)	0	72.30
Lapsed or canceled (in dollars per share)	112.48	112.56
Balance at end of period (in dollars per share)	99.64	100.56
Options exercisable at end of period (in dollars per share)	$ 99.64	$ 100.56
Restricted Stock Awards
Summary of restricted stock
Balance at beginning of year (in shares)	3,459,363	3,337,545
Granted (in shares)	77,148	141,515
Canceled (in shares)	(9,075)	(19,697)
Balance at end of period (in shares)	3,527,436	3,459,363
Vested during the period (in shares)	116,862	122,759
Compensation expense	$ 1,920,738	$ 8,497,054
Total fair value of shares granted during the period	$ 5,931,470	$ 9,214,531

Accumulated Other Comprehensi_3

Accumulated Other Comprehensive Loss (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2022	Dec. 31, 2021
Accumulated Other Comprehensive Income (Loss) of the Company [Roll Forward]
Beginning Balance	$ 4,778,253
Other comprehensive gain before reclassifications	34,884
Amounts reclassified from accumulated other comprehensive loss	4,613
Ending Balance	4,739,115
Deferred net losses from terminated hedges	(600)	$ (600)
Net unrealized gain (loss) on derivative instruments
Accumulated Other Comprehensive Income (Loss) of the Company [Roll Forward]
Beginning Balance	(25,881)
Other comprehensive gain before reclassifications	26,790
Amounts reclassified from accumulated other comprehensive loss	3,649
Ending Balance	4,558
Net unrealized (loss) gain on marketable securities
Accumulated Other Comprehensive Income (Loss) of the Company [Roll Forward]
Beginning Balance	1,117
Other comprehensive gain before reclassifications	(1,691)
Amounts reclassified from accumulated other comprehensive loss	0
Ending Balance	(574)
Accumulated Other Comprehensive Loss
Accumulated Other Comprehensive Income (Loss) of the Company [Roll Forward]
Beginning Balance	(46,758)
Ending Balance	(7,261)
Joint venture
Accumulated Other Comprehensive Income (Loss) of the Company [Roll Forward]
Beginning Balance	4,264,657
Ending Balance	4,268,627
Joint venture | Net unrealized gain (loss) on derivative instruments
Accumulated Other Comprehensive Income (Loss) of the Company [Roll Forward]
Beginning Balance	(21,994)
Other comprehensive gain before reclassifications	9,785
Amounts reclassified from accumulated other comprehensive loss	964
Ending Balance	$ (11,245)

Fair Value Measurements (Detail

Fair Value Measurements (Details) - USD ($) $ in Thousands	Mar. 31, 2022	Dec. 31, 2021
Fair Value of Financial Instruments
Marketable securities available-for-sale	$ 22,353	$ 24,146
Interest rate cap and swap agreements (included in Other assets)	10,052	1,896
Debt and preferred equity investments	1,107,870	1,088,723
Carrying Value
Fair Value of Financial Instruments
Debt and preferred equity investments	1,107,870	1,088,723
Fixed rate debt	3,321,239	3,274,324
Variable rate debt	813,478	801,051
Total	4,134,717	4,075,375
Fair Value
Fair Value of Financial Instruments
Marketable securities available-for-sale	22,353	24,146
Total	4,135,040	4,137,135
Estimated fair value of debt and preferred equity investments, low end of range	1,000,000	1,000,000
Estimated fair value of debt and preferred equity investments, high end of range	1,100,000	1,100,000
Level 1
Fair Value of Financial Instruments
Interest rate cap and swap agreements (included in Other assets)	0	0
Level 2
Fair Value of Financial Instruments
Interest rate cap and swap agreements (included in Other assets)	10,052	1,896
Level 3
Fair Value of Financial Instruments
Marketable securities available-for-sale	0	0
Interest rate cap and swap agreements (included in Other assets)	0	0
Level 3 | Fair Value
Fair Value of Financial Instruments
Fixed rate debt	3,322,000	3,336,463
Variable rate debt	813,040	800,672
Marketable securities available-for-sale | Level 1
Fair Value of Financial Instruments
Marketable securities available-for-sale	0	0
Commercial mortgage-backed securities
Fair Value of Financial Instruments
Marketable securities available-for-sale	22,353	24,146
Commercial mortgage-backed securities | Level 2
Fair Value of Financial Instruments
Marketable securities available-for-sale	22,353	24,146
Other liabilities
Fair Value of Financial Instruments
Interest rate cap and swap agreements (included in Other liabilities)	5,795	29,912
Other liabilities | Level 1
Fair Value of Financial Instruments
Interest rate cap and swap agreements (included in Other liabilities)	0	0
Other liabilities | Level 2
Fair Value of Financial Instruments
Interest rate cap and swap agreements (included in Other liabilities)	5,795	29,912
Other liabilities | Level 3
Fair Value of Financial Instruments
Interest rate cap and swap agreements (included in Other liabilities)	$ 0	$ 0

Financial Instruments_ Deriva_3

Financial Instruments: Derivatives and Hedging (Details) - USD ($)	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021	Dec. 31, 2021
Financial Instruments: Derivatives and Hedging
Fair Value	$ 10,052,000		$ 1,896,000
Gain (loss) from changes in fair value	0	$ 0
Fair value of derivatives in a net liability position	6,800,000
Aggregate termination value	7,000,000
Estimated current balance held in accumulated other comprehensive loss to be reclassified into earnings within the next 12 months	(3,700,000)
Share of joint venture of accumulated other comprehensive loss reclassified into equity in net income from unconsolidated joint ventures within the next 12 months	1,300,000
Amount of Gain Recognized in Other Comprehensive Loss	38,686,000	45,175,000
Amount of Loss Reclassified from Accumulated Other Comprehensive Loss into Income	(4,881,000)	(6,088,000)
Interest Rate Cap Expiring November 2021
Financial Instruments: Derivatives and Hedging
Notional Value	$ 111,869,000
Strike Rate	3.50%
Fair Value	$ 9,000
Interest Rate Swap Expiring January 2023
Financial Instruments: Derivatives and Hedging
Notional Value	$ 100,000,000
Strike Rate	0.212%
Fair Value	$ 1,223,000
Interest Rate Swap Expiring February 2023
Financial Instruments: Derivatives and Hedging
Notional Value	$ 400,000,000
Strike Rate	0.184%
Fair Value	$ 4,838,000
Interest Rate Swap Expiring February 2023, 2
Financial Instruments: Derivatives and Hedging
Notional Value	$ 50,000,000
Strike Rate	0.633%
Fair Value	$ 373,000
Interest Rate Swap Expiring in July 2023
Financial Instruments: Derivatives and Hedging
Notional Value	$ 100,000,000
Strike Rate	1.163%
Fair Value	$ 1,177,000
Interest Rate Swap Expiring in July 2023, 2
Financial Instruments: Derivatives and Hedging
Notional Value	$ 200,000,000
Strike Rate	1.133%
Fair Value	$ 2,432,000
Interest Rate Swap Expiring January 2024
Financial Instruments: Derivatives and Hedging
Notional Value	$ 150,000,000
Strike Rate	2.70%
Fair Value	$ (1,153,000)
Interest Rate Swap Expiring January 2026
Financial Instruments: Derivatives and Hedging
Notional Value	$ 150,000,000
Strike Rate	2.721%
Fair Value	$ (1,865,000)
Interest Rate Swap Expiring January 2026, 2
Financial Instruments: Derivatives and Hedging
Notional Value	$ 200,000,000
Strike Rate	2.762%
Fair Value	$ (2,777,000)
Interest Rate Contract
Financial Instruments: Derivatives and Hedging
Fair Value	4,257,000
Interest Rate Swaps/Caps
Financial Instruments: Derivatives and Hedging
Amount of Gain Recognized in Other Comprehensive Loss	28,378,000	10,220,000
Amount of Loss Reclassified from Accumulated Other Comprehensive Loss into Income	(3,866,000)	(4,388,000)
Joint venture
Financial Instruments: Derivatives and Hedging
Amount of Gain Recognized in Other Comprehensive Loss	10,308,000	34,955,000
Amount of Loss Reclassified from Accumulated Other Comprehensive Loss into Income	(1,015,000)	$ (1,700,000)
Joint venture | Interest Rate Contract
Financial Instruments: Derivatives and Hedging
Fair Value	36,375,000
Joint venture | Interest Rate Cap Expiring September 2022
Financial Instruments: Derivatives and Hedging
Notional Value	$ 1,075,000,000
Strike Rate	2.85%
Fair Value	$ 21,000
Joint venture | Interest Rate Cap Expiring September 2022, 2
Financial Instruments: Derivatives and Hedging
Notional Value	$ 125,000,000
Strike Rate	2.85%
Fair Value	$ 2,000
Joint venture | Interest Rate Cap Expiring January 2023
Financial Instruments: Derivatives and Hedging
Notional Value	$ 23,000,000
Strike Rate	4.75%
Fair Value	$ 2,000
Joint venture | Interest Rate Cap Expiring February 2023
Financial Instruments: Derivatives and Hedging
Notional Value	$ 220,000,000
Strike Rate	4.00%
Fair Value	$ 68,000
Joint venture | Interest Rate Cap Expiring June 2023
Financial Instruments: Derivatives and Hedging
Notional Value	$ 510,000,000
Strike Rate	3.00%
Fair Value	$ 1,297,000
Joint venture | Interest Rate Cap Expiring May 2024
Financial Instruments: Derivatives and Hedging
Notional Value	$ 237,340,000
Strike Rate	0.55%
Fair Value	$ 14,994,000
Joint venture | Interest Rate Cap Expiring May 2024, 2
Financial Instruments: Derivatives and Hedging
Notional Value	$ 118,670,000
Strike Rate	0.55%
Fair Value	$ 14,977,000
Joint venture | Interest Rate Swap Expiring February 2026
Financial Instruments: Derivatives and Hedging
Notional Value	$ 177,000,000
Strike Rate	1.669%
Fair Value	$ 5,014,000

Lease Income - Lease Income (De

Lease Income - Lease Income (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021
Leases [Abstract]
Fixed lease payments	$ 136,581	$ 164,679
Variable lease payments	19,555	25,279
Total lease payments	156,136	189,958
Amortization of acquired above and below-market leases	(105)	(1,869)
Total rental revenue	156,031	188,089
Sublease Income	56,200	65,800
Interest income	$ 1,092	$ 1,101

Segment Information - Additiona

Segment Information - Additional Information (Details) $ in Thousands		3 Months Ended
		Mar. 31, 2022USD ($)segment	Mar. 31, 2021USD ($)	Dec. 31, 2021USD ($)
Segment information
Number of reportable segments | segment		2
Total revenues		$ 187,964	$ 226,102
Net income (loss)		13,485	(3,855)
Total assets	[1]	11,014,965		$ 11,066,629
Marketing, general and administrative		24,776	22,885
Operating Segments | Real Estate Segment
Segment information
Total revenues		168,076	206,829
Net income (loss)		(3,482)	(20,027)
Total assets		9,902,557		9,974,140
Operating Segments | Debt and Preferred Equity Segment
Segment information
Total revenues		19,888	19,273
Net income (loss)		16,967	$ 16,172
Total assets		$ 1,112,408		$ 1,092,489
[1]	(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 $193.4 million of land, $291.2 million and $336.9 million of building and improvements, $— million and $— million of building and leasehold improvements, $15.4 million and $15.4 million of right of use assets, $11.5 million and $11.7 million of accumulated depreciation, $569.7 million and $574.4 million of other assets included in other line items, $372.5 million and $418.9 million of real estate debt, net, $0.8 million and $0.8 million of accrued interest payable, $15.3 million and $15.3 million of lease liabilities, and $226.4 million and $145.2 million of other liabilities included in other line items as of March 31, 2022 and December 31, 2021, respectively.