SL Green Operating Partnership 10-K 16 Feb 23 2022 FY Annual report Financial data

Cover Page

Cover Page - USD ($) $ in Billions	12 Months Ended
	Dec. 31, 2022	Feb. 15, 2023	Jun. 30, 2022
Document Information [Line Items]
Document Type	10-K
Document Annual Report	true
Current Fiscal Year End Date	--12-31
Document Period End Date	Dec. 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 Well-known Seasoned Issuer	Yes
Entity Voluntary Filers	No
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
ICFR Auditor Attestation Flag	true
Entity Shell Company	false
Entity Public Float			$ 2.7
Entity Common Stock, Shares Outstanding		64,365,509
Documents Incorporated by Reference	Portions of the SL Green Realty Corp.'s Proxy Statement for its 2022 Annual Stockholders' Meeting to be filed within 120 days after the end of the Registrant's fiscal year are incorporated by reference into Part III of this Annual Report on Form 10-K.
Entity Central Index Key	0001040971
Document Fiscal Year Focus	2022
Document Fiscal Period Focus	FY
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]
Current Fiscal Year End Date	--12-31
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 Well-known Seasoned Issuer	No
Entity Voluntary Filers	No
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
ICFR Auditor Attestation Flag	true
Entity Shell Company	false
Entity Common Stock, Shares Outstanding		306,987
Entity Central Index Key	0001492869
Document Fiscal Year Focus	2022
Document Fiscal Period Focus	FY
Amendment Flag	false

Audit Information

Audit Information	12 Months Ended
	Dec. 31, 2022
Auditor [Line Items]
Auditor Firm ID	42
Auditor Name	Ernst & Young LLP
Auditor Location	New York, New York
SL Green Operating Partnership
Auditor [Line Items]
Auditor Firm ID	42
Auditor Name	Ernst & Young LLP
Auditor Location	New York, New York

Consolidated Balance Sheets

Consolidated Balance Sheets - USD ($) $ in Thousands		Dec. 31, 2022	Dec. 31, 2021
Commercial real estate properties, at cost:
Land and land interests		$ 1,576,927	$ 1,350,701
Building and improvements		4,903,776	3,671,402
Building leasehold and improvements		1,691,831	1,645,081
Right of use asset - operating leases		1,026,265	983,723
Total commercial real estate properties, at cost		9,198,799	7,650,907
Less: accumulated depreciation		(2,039,554)	(1,896,199)
Total commercial real estate properties, net		7,159,245	5,754,708
Assets held for sale		0	140,855
Cash and cash equivalents		203,273	251,417
Restricted cash		180,781	85,567
Investments in marketable securities		11,240	34,752
Tenant and other receivables		34,497	47,616
Related party receivables		27,352	29,408
Deferred rents receivable		257,887	248,313
Debt and preferred equity investments, net of discounts and deferred origination fees of $1,811 and $5,057 and allowances of $6,630 and $6,630 in 2022 and 2021, respectively		623,280	1,088,723
Investments in unconsolidated joint ventures		3,190,137	2,997,934
Deferred costs, net		121,157	124,495
Other assets		546,945	262,841
Total assets	[1]	12,355,794	11,066,629
Liabilities
Mortgages and other loans payable, net		3,227,563	1,394,386
Revolving credit facility, net		443,217	381,334
Unsecured term loans, net		1,641,552	1,242,002
Unsecured notes, net		99,692	899,308
Accrued interest payable		14,227	12,698
Other liabilities		236,211	195,390
Accounts payable and accrued expenses		154,867	157,571
Deferred revenue		272,248	107,275
Lease liability - financing leases		104,218	102,914
Lease liability - operating leases		895,100	851,370
Dividend and distributions payable		21,569	187,372
Security deposits		50,472	52,309
Liabilities related to assets held for sale		0	64,120
Junior subordinated deferrable interest debentures held by trusts that issued trust preferred securities		100,000	100,000
Total liabilities	[1]	7,260,936	5,748,049
Commitments and contingencies
Noncontrolling interests in Operating Partnership		269,993	344,252
Preferred units		177,943	196,075
SL Green stockholders' equity:
Series I Preferred Stock, $0.01 par value, $25.00 liquidation preference, 9,200 issued and outstanding at both December 31, 2022 and 2021		221,932	221,932
Common stock, $0.01 par value, 160,000 shares authorized and 65,440 and 65,132 issued and outstanding at December 31, 2022 and 2021, respectively (including 1,060 and 1,027 shares held in treasury at December 31, 2022 and 2021, respectively)		656	672
Additional paid-in-capital		3,790,358	3,739,409
Treasury stock at cost		(128,655)	(126,160)
Accumulated other comprehensive income (loss)		49,604	(46,758)
Retained earnings		651,138	975,781
Total SL Green stockholders' equity		4,585,033	4,764,876
Noncontrolling interests in other partnerships		61,889	13,377
Total equity		4,646,922	4,778,253
Total liabilities and equity/capital		$ 12,355,794	$ 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: $41.2 million and $193.4 million of land, $41.0 million and $336.9 million of building and improvements, $— million and $— million of building and leasehold improvements, $— million and $15.4 million of right of use assets, $4.4 million and $11.7 million of accumulated depreciation, $599.2 million and $574.4 million of other assets included in other line items, $49.8 million and $418.9 million of real estate debt, net, $0.2 million and $0.8 million of accrued interest payable, $— million and $15.3 million of lease liabilities, and $146.4 million and $145.2 million of other liabilities included in other line items as of December 31, 2022 and December 31, 2021, respectively.

Consolidated Balance Sheets (Pa

Consolidated Balance Sheets (Parenthetical) - USD ($) $ in Thousands	Dec. 31, 2022	Dec. 31, 2021
Debt and preferred equity investments, net of discounts and deferred origination fees	$ 1,811	$ 5,057
Allowance for loan and lease losses	$ 6,630	$ 6,630
Preferred stock, par (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 issued (in shares)	65,440,000	65,132,000
Common stock, shares outstanding (in shares)	65,440,000	65,132,000
Treasury stock, shares (in shares)	1,060,000	1,027,000
Land	$ 1,576,927	$ 1,350,701
Building and improvements	4,903,776	3,671,402
Building leasehold and improvements	1,691,831	1,645,081
Right of use asset - operating leases	1,026,265	983,723
Accumulated depreciation	2,039,554	1,896,199
Other assets	546,945	262,841
Real estate debt	3,227,563	1,394,386
Accrued interest payable	14,227	12,698
Lease liabilities	104,218	102,914
Other liabilities	236,211	195,390
Service Corporation
Land	41,200	193,400
Building and improvements	41,000	336,900
Building leasehold and improvements	0	0
Right of use asset - operating leases	0	15,400
Accumulated depreciation	4,400	11,700
Other assets	599,200	574,400
Real estate debt	49,800	418,900
Accrued interest payable	200	800
Lease liabilities	0	15,300
Other liabilities	$ 146,400	$ 145,200
Series I Preferred Stock
Preferred stock, par (in dollars per share)	$ 0.01	$ 0.01
Preferred stock, liquidation preference (in dollars per share)	$ 25	$ 25
Preferred stock, shares issued (in shares)	9,200,000	9,200,000
Preferred stock, shares outstanding (in shares)	9,200,000	9,200,000

Consolidated Statements of Oper

Consolidated Statements of Operations - USD ($) shares in Thousands, $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Revenues
Rental revenue, net	$ 671,500	$ 678,176	$ 804,423
Investment income	81,113	80,340	120,163
Other income	74,126	85,475	128,158
Total revenues	826,739	843,991	1,052,744
Expenses
Operating expenses, including related party expenses of $5,701 in 2022, $12,377 in 2021 and $12,643 in 2020	174,063	167,153	183,200
Real estate taxes	138,228	152,835	176,315
Operating lease rent	26,943	26,554	29,043
Interest expense, net of interest income	89,473	70,891	116,679
Amortization of deferred financing costs	7,817	11,424	11,794
Depreciation and amortization	215,306	216,869	313,668
Loan loss and other investment reserves, net of recoveries	0	2,931	35,298
Transaction related costs	409	3,773	503
Marketing, general and administrative	93,798	94,912	91,826
Total expenses	746,037	747,342	958,326
Equity in net loss from unconsolidated joint ventures	(57,958)	(55,402)	(25,195)
Equity in net (loss) gain on sale of interest in unconsolidated joint venture/real estate	(131)	(32,757)	2,961
Purchase price and other fair value adjustments	(8,118)	210,070	187,522
(Loss) gain on sale of real estate, net	(84,485)	287,417	215,506
Depreciable real estate reserves and impairments	(6,313)	(23,794)	(60,454)
Loss on early extinguishment of debt	0	(1,551)	0
Net (loss) income	(76,303)	480,632	414,758
Net loss (income) attributable to noncontrolling interests:
Noncontrolling interests in the Operating Partnership	5,794	(25,457)	(20,016)
Net loss (income) attributable to noncontrolling interests in other partnerships	(1,122)	1,884	(14,940)
Preferred unit distributions	(6,443)	(7,305)	(8,747)
Net income (loss) attributable to SL Green/SLGOP	(78,074)	449,754	371,055
Perpetual preferred stock dividends	(14,950)	(14,950)	(14,950)
Net (loss) income attributable to SL Green common stockholders	$ (93,024)	$ 434,804	$ 356,105
Basic earnings per share (in dollars per share)	$ (1.49)	$ 6.57	$ 5.03
Diluted earnings per share (in dollars per share)	$ (1.49)	$ 6.50	$ 5.01
Basic weighted average common shares outstanding (in shares)	63,917	65,740	70,397
Diluted weighted average common shares and common share equivalents outstanding (in shares)	67,929	70,769	75,078

Consolidated Statements of Op_2

Consolidated Statements of Operations (Parenthetical) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Income Statement [Abstract]
Payments made for services	$ 5,701	$ 12,377	$ 12,643

Consolidated Statements of Comp

Consolidated Statements of Comprehensive Income - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Statement of Comprehensive Income [Abstract]
Net (loss) income	$ (76,303)	$ 480,632	$ 414,758
Other comprehensive income (loss):
Increase (decrease) in unrealized value of derivative instruments, including SL Green's share of joint venture derivative instruments	103,629	21,427	(39,743)
(Decrease) increase in unrealized value of marketable securities	(1,440)	104	(1,318)
Other comprehensive income (loss)	102,189	21,531	(41,061)
Comprehensive income	25,886	502,163	373,697
Net income attributable to noncontrolling interests and preferred units distributions	(1,771)	(30,878)	(43,703)
Other comprehensive (income) loss attributable to noncontrolling interests	(5,827)	(1,042)	2,299
Comprehensive income attributable to SL Green/SLGOP	$ 18,288	$ 470,243	$ 332,293

Consolidated Statement of Equit

Consolidated Statement of Equity - USD ($) shares in Thousands, $ in Thousands	Total	Cumulative Effect, Period of Adoption, Adjustment	Cumulative Effect, Period of Adoption, Adjusted Balance	Common Stock	Common Stock Cumulative Effect, Period of Adoption, Adjusted Balance	Additional Paid- In-Capital	Additional Paid- In-Capital Cumulative Effect, Period of Adoption, Adjusted Balance	Treasury Stock	Treasury Stock Cumulative Effect, Period of Adoption, Adjusted Balance	Accumulated Other Comprehensive Income (Loss)	Accumulated Other Comprehensive Income (Loss) Cumulative Effect, Period of Adoption, Adjusted Balance	Retained Earnings	Retained Earnings Cumulative Effect, Period of Adoption, Adjustment	Retained Earnings Cumulative Effect, Period of Adoption, Adjusted Balance	Noncontrolling Interests	Noncontrolling Interests Cumulative Effect, Period of Adoption, Adjusted Balance	Series I Preferred Stock Preferred Stock	Series I Preferred Stock Preferred Stock Cumulative Effect, Period of Adoption, Adjusted Balance
Beginning Balance at Dec. 31, 2019	$ 5,517,198	$ (39,184)	$ 5,478,014	$ 803	$ 803	$ 4,286,395	$ 4,286,395	$ (124,049)	$ (124,049)	$ (28,485)	$ (28,485)	$ 1,084,719	$ (39,184)	$ 1,045,535	$ 75,883	$ 75,883	$ 221,932	$ 221,932
Beginning Balance (in shares) at Dec. 31, 2019				74,672	74,672
Increase (Decrease) in Stockholders' Equity
Net loss	385,995											371,055			14,940
Acquisition of subsidiary interest from noncontrolling interest	(1,536)					(3,123)									1,587
Other comprehensive loss	(38,762)									(38,762)
Preferred dividends	(14,950)											(14,950)
DRSPP (in shares)				16
DRSPP proceeds	1,006					1,006
Conversion of units of the Operating Partnership to common stock (in shares)				95
Conversion of units in the Operating Partnership for common stock	8,744			$ 1		8,743
Reallocation of noncontrolling interest in the operating partnership	32,598											32,598
Deferred compensation plan and stock awards, net of forfeitures and tax withholdings (in shares)				(33)
Deferred compensation plan and stock awards, net of forfeitures and tax withholdings	25,271					25,271
Repurchases of common stock (in shares)				(8,276)
Repurchases of common units	(532,262)			$ (88)		(455,343)						(76,831)
Contributions to consolidated joint venture interests	12,477														12,477
Cash distributions to noncontrolling interests	(78,855)														(78,855)
Cash distributions declared ( per common share, none of which represented a return of capital for federal income tax purposes)	(341,945)											(341,945)
Ending Balance at Dec. 31, 2020	4,935,795			$ 716		3,862,949		(124,049)		(67,247)		1,015,462			26,032		221,932
Ending Balance (in shares) at Dec. 31, 2020				66,474
Increase (Decrease) in Stockholders' Equity
Net loss	447,870											449,754			(1,884)
Other comprehensive loss	20,489									20,489
Preferred dividends	(14,950)											(14,950)
DRSPP (in shares)				11
DRSPP proceeds	738					738
Reallocation of noncontrolling interest in the operating partnership	(9,851)											(9,851)
Deferred compensation plan and stock awards, net of forfeitures and tax withholdings (in shares)				108
Deferred compensation plan and stock awards, net of forfeitures and tax withholdings	32,583			$ 2		32,581
Repurchases of common stock (in shares)				(4,474)
Repurchases of common units	(337,624)			$ (46)		(281,206)						(56,372)
Proceeds from stock options exercised (in shares)				12
Proceeds from stock options exercised	818					818
Contributions to consolidated joint venture interests	336														336
Sale of interest in partially owned entity	(4,476)														(4,476)
Cash distributions to noncontrolling interests	(6,631)														(6,631)
Issuance of a special dividend paid primarily in stock (in shares)				1,974
Issuance of special dividend paid in stock	123,529					123,529		(2,111)				2,111
Cash distributions declared ( per common share, none of which represented a return of capital for federal income tax purposes)	(410,373)											(410,373)
Ending Balance at Dec. 31, 2021	4,778,253			$ 672		3,739,409		(126,160)		(46,758)		975,781			13,377		221,932
Ending Balance (in shares) at Dec. 31, 2021				64,105
Increase (Decrease) in Stockholders' Equity
Net loss	(76,952)											(78,074)			1,122
Acquisition of subsidiary interest from noncontrolling interest	(29,817)					(29,742)									(75)
Other comprehensive loss	96,362									96,362
Preferred dividends	(14,950)											(14,950)
DRSPP (in shares)				11
DRSPP proceeds	525					525
Reallocation of noncontrolling interest in the operating partnership	39,974											39,974
Deferred compensation plan and stock awards, net of forfeitures and tax withholdings (in shares)				274
Deferred compensation plan and stock awards, net of forfeitures and tax withholdings	32,034			$ 4		32,030
Repurchases of common stock (in shares)				(1,971)
Repurchases of common units	(151,197)			$ (20)		(114,979)						(36,198)
Contributions to consolidated joint venture interests	52,164														52,164
Cash distributions to noncontrolling interests	(4,699)														(4,699)
Issuance of a special dividend paid primarily in stock (in shares)				1,961
Issuance of special dividend paid in stock	160,620					163,115		(2,495)
Cash distributions declared ( per common share, none of which represented a return of capital for federal income tax purposes)	(235,395)											(235,395)
Ending Balance at Dec. 31, 2022	$ 4,646,922			$ 656		$ 3,790,358		$ (128,655)		$ 49,604		$ 651,138			$ 61,889		$ 221,932
Ending Balance (in shares) at Dec. 31, 2022				64,380

Consolidated Statement of Equ_2

Consolidated Statement of Equity (Parenthetical) - $ / shares	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Statement of Stockholders' Equity [Abstract]
Cash distribution declared, per common share (in dollars per share)	$ 3.6896	$ 6.2729	$ 4.9374

Consolidated Statements of Cash

Consolidated Statements of Cash Flows - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Operating Activities
Net (loss) income	$ (76,303)	$ 480,632	$ 414,758
Adjustments to reconcile net (loss) income to net cash provided by operating activities:
Depreciation and amortization	223,123	228,293	325,462
Equity in net loss from unconsolidated joint ventures	57,958	55,402	25,195
Distributions of cumulative earnings from unconsolidated joint ventures	780	824	679
Equity in net loss (gain) on sale of interest in unconsolidated joint venture interest/real estate	131	32,757	(2,961)
Purchase price and other fair value adjustments	8,118	(210,070)	(187,522)
Depreciable real estate reserves and impairments	6,313	23,794	60,454
Loss (gain) on sale of real estate, net	84,485	(287,417)	(215,506)
Loan loss reserves and other investment reserves, net of recoveries	0	2,931	35,298
Loss on early extinguishment of debt	0	1,551	0
Deferred rents receivable	(5,749)	(6,701)	(7,582)
Non-cash lease expense	22,403	17,234	11,984
Other non-cash adjustments	(5,676)	37,164	15,178
Changes in operating assets and liabilities:
Tenant and other receivables	14,370	(20,561)	(17,074)
Related party receivables	6,666	(8,727)	1,451
Deferred lease costs	(21,792)	(10,117)	(20,900)
Other assets	(27,343)	20,345	(26,137)
Accounts payable, accrued expenses, other liabilities and security deposits	(30,839)	(66,387)	132,171
Deferred revenue	18,332	(1,727)	20,657
Change in lease liability - operating leases	1,111	(33,241)	(11,369)
Net cash provided by operating activities	276,088	255,979	554,236
Investing Activities
Acquisitions of real estate property	(64,491)	(152,791)	(86,846)
Additions to land, buildings and improvements	(300,770)	(302,486)	(458,140)
Investments in unconsolidated joint ventures	(184,518)	(88,872)	(70,315)
Distributions in excess of cumulative earnings from unconsolidated joint ventures	141,742	770,604	124,572
Net proceeds from disposition of real estate/joint venture interest	626,364	651,594	1,112,382
Cash and restricted cash assumed from acquisition of real estate investment	60,494	0	0
Cash assumed from consolidation of real estate investment	0	9,475	0
Proceeds from sale or redemption of marketable securities	15,626	4,528	0
Purchases of marketable securities	0	(10,000)	0
Other investments	1,432	40,200	32,479
Origination of debt and preferred equity investments	(51,367)	(95,695)	(360,953)
Repayments or redemption of debt and preferred equity investments	181,293	167,024	763,251
Net cash provided by investing activities	425,805	993,581	1,056,430
Financing Activities
Proceeds from mortgages and other loans payable	381,980	39,689	1,181,892
Repayments of mortgages and other loans payable	(292,364)	(375,044)	(1,186,828)
Proceeds from revolving credit facility and senior unsecured notes	1,524,000	1,488,000	1,495,000
Repayments of revolving credit facility and senior unsecured notes	(1,864,000)	(1,808,000)	(1,875,000)
Proceeds from stock options exercised and DRSPP issuance	525	1,556	1,006
Repurchase of common stock	(151,197)	(341,403)	(528,483)
Redemption of preferred stock	(17,967)	(6,040)	(82,750)
Redemption of OP units	(40,901)	(25,703)	(27,342)
Distributions to noncontrolling interests in other partnerships	(4,699)	(6,631)	(85,468)
Contributions from noncontrolling interests in other partnerships	52,164	336	12,477
Acquisition of subsidiary interest from noncontrolling interest	(29,817)	0	(1,536)
Distributions to noncontrolling interests in the Operating Partnership	(16,272)	(15,749)	(12,652)
Dividends paid on common and preferred stock	(262,136)	(271,075)	(293,996)
Other obligation related to secured borrowing	77,874	51,862	0
Tax withholdings related to restricted share awards	(3,915)	(2,990)	(4,752)
Deferred loan costs	(8,098)	(13,745)	(70,036)
Principal payments of on financing lease liabilities	0	(434)	(833)
Net cash used in financing activities	(654,823)	(1,285,371)	(1,479,301)
Net increase (decrease) in cash, cash equivalents, and restricted cash	47,070	(35,811)	131,365
Cash, cash equivalents, and restricted cash at beginning of year	336,984	372,795	241,430
Cash, cash equivalents, and restricted cash at end of period	384,054	336,984	372,795
Supplemental cash flow disclosures:
Interest paid	169,519	152,773	201,348
Income taxes paid	5,358	4,405	2,296
Supplemental Disclosure of Non-Cash Investing and Financing Activities:
Conversion of units in the Operating Partnership	0	0	8,744
Redemption of units in the Operating Partnership for a joint venture sale	0	27,586	0
Exchange of preferred equity investment for real estate or equity in joint venture	190,652	0	119,497
Exchange of debt investment for real estate or equity in joint venture	193,995	9,468	122,796
Assumption of mortgage and mezzanine loans	1,712,750	60,000	0
Issuance of special dividend paid in stock	160,620	121,418	0
Tenant improvements and capital expenditures payable	18,518	7,580	1,665
Fair value adjustment to noncontrolling interest in the Operating Partnership	39,974	9,851	32,598
Investment in joint venture	47,135	0	0
Deconsolidation of a subsidiary	0	66,837	854,437
Deconsolidation of a subsidiary mortgage	0	510,000	5,593
Mortgages assumed in connection with sale of real estate	0	0	250,000
Seller financed purchases	0	0	100,000
Debt and preferred equity investments	302	8,372	9,014
Transfer of assets related to assets held for sale	0	140,855	0
Reversal of assets held for sale	0	0	391,664
Transfer of liabilities related to assets held for sale	0	64,120	0
Extinguishment of debt in connection with property dispositions	0	53,548	0
Consolidation of real estate investment	0	119,444	0
Removal of fully depreciated commercial real estate properties	30,359	19,831	66,169
Sale of interest in partially owned entity	0	4,476	0
Distributions to noncontrolling interests	0	358	6,613
Share repurchase payable	0	0	3,779
Recognition of sales-type leases and related lease liabilities	0	0	119,725
Recognition of right of use assets and related lease liabilities	57,938	537,344	61,990
Cash and cash equivalents	203,273	251,417	266,059
Restricted cash	180,781	85,567	106,736
Total cash, cash equivalents, and restricted cash	$ 384,054	$ 336,984	$ 372,795

Consolidated Statements of Ca_2

Consolidated Statements of Cash Flows (Parenthetical) - $ / shares	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Cash distribution declared, per common share (in dollars per share)	$ 3.6896	$ 6.2729	$ 4.9374
Ordinary Dividend
Cash distribution declared, per common share (in dollars per share)	$ 0.2708	0.3108	0.3217
Special Dividend
Cash distribution declared, per common share (in dollars per share)		$ 2.4392
Stock Distribution
Cash distribution declared, per common share (in dollars per share)			$ 1.7996

Consolidated Balance Sheets (_2

Consolidated Balance Sheets (Partnership) - USD ($) $ in Thousands		Dec. 31, 2022	Dec. 31, 2021
Commercial real estate properties, at cost:
Land and land interests		$ 1,576,927	$ 1,350,701
Building and improvements		4,903,776	3,671,402
Building leasehold and improvements		1,691,831	1,645,081
Right of use asset - operating leases		1,026,265	983,723
Total commercial real estate properties, at cost		9,198,799	7,650,907
Less: accumulated depreciation		(2,039,554)	(1,896,199)
Total commercial real estate properties, net		7,159,245	5,754,708
Assets held for sale		0	140,855
Cash and cash equivalents		203,273	251,417
Restricted cash		180,781	85,567
Investments in marketable securities		11,240	34,752
Tenant and other receivables		34,497	47,616
Related party receivables		27,352	29,408
Deferred rents receivable		257,887	248,313
Debt and preferred equity investments, net of discounts and deferred origination fees of $1,811 and $5,057 and allowances of $6,630 and $6,630 in 2022 and 2021, respectively		623,280	1,088,723
Investments in unconsolidated joint ventures		3,190,137	2,997,934
Deferred costs, net		121,157	124,495
Other assets		546,945	262,841
Total assets	[1]	12,355,794	11,066,629
Liabilities
Mortgages and other loans payable, net		3,227,563	1,394,386
Revolving credit facility, net		443,217	381,334
Unsecured term loans, net		1,641,552	1,242,002
Unsecured notes, net		99,692	899,308
Accrued interest payable		14,227	12,698
Other liabilities		236,211	195,390
Accounts payable and accrued expenses		154,867	157,571
Deferred revenue		272,248	107,275
Lease liability - financing leases		104,218	102,914
Lease liability - operating leases		895,100	851,370
Dividend and distributions payable		21,569	187,372
Security deposits		50,472	52,309
Liabilities related to assets held for sale		0	64,120
Junior subordinated deferrable interest debentures held by trusts that issued trust preferred securities		100,000	100,000
Total liabilities	[1]	7,260,936	5,748,049
Commitments and contingencies
Preferred units		177,943	196,075
SL Green stockholders equity:
Accumulated other comprehensive income (loss)		49,604	(46,758)
Total liabilities and equity/capital		12,355,794	11,066,629
SL Green Operating Partnership
Commercial real estate properties, at cost:
Land and land interests		1,576,927	1,350,701
Building and improvements		4,903,776	3,671,402
Building leasehold and improvements		1,691,831	1,645,081
Right of use asset - operating leases		1,026,265	983,723
Total commercial real estate properties, at cost		9,198,799	7,650,907
Less: accumulated depreciation		(2,039,554)	(1,896,199)
Total commercial real estate properties, net		7,159,245	5,754,708
Assets held for sale		0	140,855
Cash and cash equivalents		203,273	251,417
Restricted cash		180,781	85,567
Investments in marketable securities		11,240	34,752
Tenant and other receivables		34,497	47,616
Related party receivables		27,352	29,408
Deferred rents receivable		257,887	248,313
Debt and preferred equity investments, net of discounts and deferred origination fees of $1,811 and $5,057 and allowances of $6,630 and $6,630 in 2022 and 2021, respectively		623,280	1,088,723
Investments in unconsolidated joint ventures		3,190,137	2,997,934
Deferred costs, net		121,157	124,495
Other assets		546,945	262,841
Total assets	[2]	12,355,794	11,066,629
Liabilities
Mortgages and other loans payable, net		3,227,563	1,394,386
Revolving credit facility, net		443,217	381,334
Unsecured term loans, net		1,641,552	1,242,002
Unsecured notes, net		99,692	899,308
Accrued interest payable		14,227	12,698
Other liabilities		236,211	195,390
Accounts payable and accrued expenses		154,867	157,571
Deferred revenue		272,248	107,275
Lease liability - financing leases		104,218	102,914
Lease liability - operating leases		895,100	851,370
Dividend and distributions payable		21,569	187,372
Security deposits		50,472	52,309
Liabilities related to assets held for sale		0	64,120
Junior subordinated deferrable interest debentures held by trusts that issued trust preferred securities		100,000	100,000
Total liabilities	[2]	7,260,936	5,748,049
Commitments and contingencies
Limited partner interests in SLGOP (3,670 and 3,782 limited partner common units outstanding at December 31, 2022 and 2021, respectively)		269,993	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, 2022 and 2021		221,932	221,932
SL Green partners' capital (680 and 677 general partner common units, and 63,700 and 63,428 limited partner common units outstanding at December 31, 2022 and 2021, respectively)		4,313,497	4,589,702
Accumulated other comprehensive income (loss)		49,604	(46,758)
Total SLGOP partners' capital		4,585,033	4,764,876
Noncontrolling interests in other partnerships		61,889	13,377
Total capital		4,646,922	4,778,253
Total liabilities and equity/capital		$ 12,355,794	$ 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: $41.2 million and $193.4 million of land, $41.0 million and $336.9 million of building and improvements, $— million and $— million of building and leasehold improvements, $— million and $15.4 million of right of use assets, $4.4 million and $11.7 million of accumulated depreciation, $599.2 million and $574.4 million of other assets included in other line items, $49.8 million and $418.9 million of real estate debt, net, $0.2 million and $0.8 million of accrued interest payable, $— million and $15.3 million of lease liabilities, and $146.4 million and $145.2 million of other liabilities included in other line items as of December 31, 2022 and December 31, 2021, respectively. (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: $41.2 million and $193.4 million of land, $41.0 million and $336.9 million of building and improvements, $— million and $— million of building and leasehold improvements, $— million and $15.4 million of right of use assets, $4.4 million and $11.7 million of accumulated depreciation, $599.2 million and $574.4 million of other assets included in other line items, $49.8 million and $418.9 million of real estate debt, net, $0.2 million and $0.8 million of accrued interest payable, $— million and $15.3 million of lease liabilities, and $146.4 million and $145.2 million of other liabilities included in other line items as of December 31, 2022 and December 31, 2021, respectively.

Consolidated Balance Sheets (_3

Consolidated Balance Sheets (Partnership) (Parenthetical) - USD ($) shares in Thousands, $ in Thousands	Dec. 31, 2022	Dec. 31, 2021
Debt and preferred equity investments, net of discounts and deferred origination fees	$ 1,811	$ 5,057
Allowance for loan and lease losses	6,630	6,630
Land	1,576,927	1,350,701
Building and improvements	4,903,776	3,671,402
Building leasehold and improvements	1,691,831	1,645,081
Right of use asset - operating leases	1,026,265	983,723
Accumulated depreciation	2,039,554	1,896,199
Other assets	546,945	262,841
Real estate debt	3,227,563	1,394,386
Accrued interest payable	14,227	12,698
Lease liabilities	104,218	102,914
Other liabilities	236,211	195,390
SL Green Operating Partnership
Debt and preferred equity investments, net of discounts and deferred origination fees	1,811	5,057
Allowance for loan and lease losses	$ 6,630	$ 6,630
Limited partner interests in Operating Partnership, limited partner common units outstanding (shares)	3,670	3,782
SL Green partner's capital, general partner common units outstanding (shares)	680	677
SL Green partners' capital, limited partner common units outstanding (shares)	63,700	63,428
Land	$ 1,576,927	$ 1,350,701
Building and improvements	4,903,776	3,671,402
Building leasehold and improvements	1,691,831	1,645,081
Right of use asset - operating leases	1,026,265	983,723
Accumulated depreciation	2,039,554	1,896,199
Other assets	546,945	262,841
Real estate debt	3,227,563	1,394,386
Accrued interest payable	14,227	12,698
Lease liabilities	104,218	102,914
Other liabilities	236,211	195,390
Service Corporation
Land	41,200	193,400
Building and improvements	41,000	336,900
Building leasehold and improvements	0	0
Right of use asset - operating leases	0	15,400
Accumulated depreciation	4,400	11,700
Other assets	599,200	574,400
Real estate debt	49,800	418,900
Accrued interest payable	200	800
Lease liabilities	0	15,300
Other liabilities	$ 146,400	$ 145,200
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 Op_3

Consolidated Statements of Operations (Partnership) - USD ($) shares in Thousands, $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Revenues
Rental revenue, net	$ 671,500	$ 678,176	$ 804,423
Investment income	81,113	80,340	120,163
Other income	74,126	85,475	128,158
Total revenues	826,739	843,991	1,052,744
Expenses
Operating expenses, including related party expenses of $5,701 in 2022, $12,377 in 2021 and $12,643 in 2020	174,063	167,153	183,200
Real estate taxes	138,228	152,835	176,315
Operating lease rent	26,943	26,554	29,043
Interest expense, net of interest income	89,473	70,891	116,679
Amortization of deferred financing costs	7,817	11,424	11,794
Depreciation and amortization	215,306	216,869	313,668
Loan loss and other investment reserves, net of recoveries	0	2,931	35,298
Transaction related costs	409	3,773	503
Marketing, general and administrative	93,798	94,912	91,826
Total expenses	746,037	747,342	958,326
Equity in net loss from unconsolidated joint ventures	(57,958)	(55,402)	(25,195)
Equity in net (loss) gain on sale of interest in unconsolidated joint venture/real estate	(131)	(32,757)	2,961
Purchase price and other fair value adjustments	(8,118)	210,070	187,522
(Loss) gain on sale of real estate, net	(84,485)	287,417	215,506
Depreciable real estate reserves and impairments	(6,313)	(23,794)	(60,454)
Loss on early extinguishment of debt	0	(1,551)	0
Net (loss) income	(76,303)	480,632	414,758
Net loss (income) attributable to noncontrolling interests:
Net loss (income) attributable to noncontrolling interests in other partnerships	(1,122)	1,884	(14,940)
Preferred unit distributions	(6,443)	(7,305)	(8,747)
Net income (loss) attributable to SL Green/SLGOP	(78,074)	449,754	371,055
Perpetual preferred stock dividends	(14,950)	(14,950)	(14,950)
SL Green Operating Partnership
Revenues
Rental revenue, net	671,500	678,176	804,423
Investment income	81,113	80,340	120,163
Other income	74,126	85,475	128,158
Total revenues	826,739	843,991	1,052,744
Expenses
Operating expenses, including related party expenses of $5,701 in 2022, $12,377 in 2021 and $12,643 in 2020	174,063	167,153	183,200
Real estate taxes	138,228	152,835	176,315
Operating lease rent	26,943	26,554	29,043
Interest expense, net of interest income	89,473	70,891	116,679
Amortization of deferred financing costs	7,817	11,424	11,794
Depreciation and amortization	215,306	216,869	313,668
Loan loss and other investment reserves, net of recoveries	0	2,931	35,298
Transaction related costs	409	3,773	503
Marketing, general and administrative	93,798	94,912	91,826
Total expenses	746,037	747,342	958,326
Equity in net loss from unconsolidated joint ventures	(57,958)	(55,402)	(25,195)
Equity in net (loss) gain on sale of interest in unconsolidated joint venture/real estate	(131)	(32,757)	2,961
Purchase price and other fair value adjustments	(8,118)	210,070	187,522
(Loss) gain on sale of real estate, net	(84,485)	287,417	215,506
Depreciable real estate reserves and impairments	(6,313)	(23,794)	(60,454)
Loss on early extinguishment of debt	0	(1,551)	0
Net (loss) income	(76,303)	480,632	414,758
Net loss (income) attributable to noncontrolling interests:
Net loss (income) attributable to noncontrolling interests in other partnerships	(1,122)	1,884	(14,940)
Preferred unit distributions	(6,443)	(7,305)	(8,747)
Net income (loss) attributable to SL Green/SLGOP	(83,868)	475,211	391,071
Perpetual preferred stock dividends	(14,950)	(14,950)	(14,950)
Net (loss) income attributable to SLGOP common unitholders	$ (98,818)	$ 460,261	$ 376,121
Basic earnings per unit (in dollars per share)	$ (1.49)	$ 6.57	$ 5.03
Diluted earnings per unit (in dollars per share)	$ (1.49)	$ 6.50	$ 5.01
Basic weighted average common units outstanding (in shares)	67,929	69,727	74,493
Diluted weighted average common units and common unit equivalents outstanding (in shares)	67,929	70,769	75,078

Consolidated Statements of Op_4

Consolidated Statements of Operations (Partnership) (Parenthetical) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Payments made for services	$ 5,701	$ 12,377	$ 12,643
SL Green Operating Partnership
Payments made for services	$ 5,701	$ 12,377	$ 12,643

Consolidated Statements of Co_2

Consolidated Statements of Comprehensive Income (Partnership) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Net (loss) income	$ (76,303)	$ 480,632	$ 414,758
Other comprehensive income (loss):
Increase (decrease) in unrealized value of derivative instruments, including SL Green's share of joint venture derivative instruments	103,629	21,427	(39,743)
(Decrease) increase in unrealized value of marketable securities	(1,440)	104	(1,318)
Other comprehensive income (loss)	102,189	21,531	(41,061)
Comprehensive income	25,886	502,163	373,697
Net (income) loss attributable to noncontrolling interests	(1,122)	1,884	(14,940)
Other comprehensive (income) loss attributable to noncontrolling interests	(5,827)	(1,042)	2,299
Comprehensive income attributable to SL Green/SLGOP	18,288	470,243	332,293
SL Green Operating Partnership
Net (loss) income	(76,303)	480,632	414,758
Other comprehensive income (loss):
Increase (decrease) in unrealized value of derivative instruments, including SL Green's share of joint venture derivative instruments	103,629	21,427	(39,743)
(Decrease) increase in unrealized value of marketable securities	(1,440)	104	(1,318)
Other comprehensive income (loss)	102,189	21,531	(41,061)
Comprehensive income	25,886	502,163	373,697
Net (income) loss attributable to noncontrolling interests	(1,122)	1,884	(14,940)
Other comprehensive (income) loss attributable to noncontrolling interests	(5,827)	(1,042)	2,299
Comprehensive income attributable to SL Green/SLGOP	$ 18,937	$ 503,005	$ 361,056

Consolidated Statement of Capit

Consolidated Statement of Capital - USD ($) shares in Thousands, $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Increase (Decrease) in Partner's Capital
Accounting Standards Update				Accounting Standards Update 2016-13 [Member]
Acquisition of subsidiary interest from noncontrolling interest	$ (29,817)		$ (1,536)
DRSPP proceeds	525	$ 738	1,006
Conversion of common units			8,744
Reallocation of noncontrolling interest in the operating partnership	39,974	(9,851)	32,598
Deferred compensation plan and stock awards, net of forfeitures and tax withholdings	32,034	32,583	25,271
Repurchases of common units	(151,197)	(337,624)	(532,262)
Proceeds from stock options exercised		818
Sale of interest in partially owned entity		(4,476)
Cash distributions to noncontrolling interests	$ (4,699)	$ (6,631)	$ (78,855)
Common Stock
Increase (Decrease) in Partner's Capital
DRSPP proceeds (in units)	11	11	16
Conversion of common units			$ 1
Deferred compensation plan and stock awards, net of forfeitures and tax withholdings (in units)	274	108	(33)
Deferred compensation plan and stock awards, net of forfeitures and tax withholdings	$ 4	$ 2
Repurchases of common units (in units)	(1,971)	(4,474)	(8,276)
Repurchases of common units	$ (20)	$ (46)	$ (88)
Proceeds from stock options exercised (in shares)		12
Noncontrolling Interests
Increase (Decrease) in Partner's Capital
Acquisition of subsidiary interest from noncontrolling interest	(75)		1,587
Sale of interest in partially owned entity		$ (4,476)
Cash distributions to noncontrolling interests	(4,699)	(6,631)	(78,855)
SL Green Operating Partnership
Increase (Decrease) in Partner's Capital
Beginning Balance	4,778,253	4,935,795	5,517,198
Net income	(76,952)	447,870	385,995
Acquisition of subsidiary interest from noncontrolling interest	(29,817)		(1,536)
Other comprehensive income (loss)	96,362	20,489	(38,762)
Preferred distributions	(14,950)	(14,950)	(14,950)
DRSPP proceeds	525	738	1,006
Conversion of common units			8,744
Reallocation of noncontrolling interest in the operating partnership	39,974	(9,851)	32,598
Deferred compensation plan and stock awards, net of forfeitures and tax withholdings	32,034	32,583	25,271
Repurchases of common units	(151,197)	(337,624)	(532,262)
Proceeds from stock options exercised		818
Contributions to consolidated joint venture interests	52,164	336	12,477
Sale of interest in partially owned entity		(4,476)
Cash distributions to noncontrolling interests	(4,699)	(6,631)	(78,855)
Issuance of special distribution paid in units	160,620	123,529
Cash distributions declared (none of which represented a return of capital for federal income tax purposes)	(235,395)	(410,373)	(341,945)
Ending Balance	4,646,922	4,778,253	4,935,795	$ 5,517,198
SL Green Operating Partnership | Cumulative Effect, Period of Adoption, Adjustment
Increase (Decrease) in Partner's Capital
Beginning Balance			(39,184)
Ending Balance				(39,184)
SL Green Operating Partnership | Cumulative Effect, Period of Adoption, Adjusted Balance
Increase (Decrease) in Partner's Capital
Beginning Balance			5,478,014
Ending Balance				5,478,014
SL Green Operating Partnership | Preferred Units | Series I Preferred Stock
Increase (Decrease) in Partner's Capital
Beginning Balance	221,932	221,932	221,932
Ending Balance	221,932	221,932	221,932	221,932
SL Green Operating Partnership | Preferred Units | Series I Preferred Stock | Cumulative Effect, Period of Adoption, Adjusted Balance
Increase (Decrease) in Partner's Capital
Beginning Balance			221,932
Ending Balance				221,932
SL Green Operating Partnership | Common Stock | Partners' Interest
Increase (Decrease) in Partner's Capital
Beginning Balance	$ 4,589,702	$ 4,755,078	$ 5,247,868
Beginning Balance (units)	64,105	66,474	74,672
Net income	$ (78,074)	$ 449,754	$ 371,055
Acquisition of subsidiary interest from noncontrolling interest	(29,742)		(3,123)
Preferred distributions	$ (14,950)	$ (14,950)	$ (14,950)
DRSPP proceeds (in units)	11	11	16
DRSPP proceeds	$ 525	$ 738	$ 1,006
Conversion of common units (in units)			95
Conversion of common units			$ 8,744
Reallocation of noncontrolling interest in the operating partnership	$ 39,974	$ (9,851)	$ 32,598
Deferred compensation plan and stock awards, net of forfeitures and tax withholdings (in units)	274	108	(33)
Deferred compensation plan and stock awards, net of forfeitures and tax withholdings	$ 32,034	$ 32,583	$ 25,271
Repurchases of common units (in units)	(1,971)	(4,474)	(8,276)
Repurchases of common units	$ (151,197)	$ (337,624)	$ (532,262)
Proceeds from stock options exercised (in shares)		12
Proceeds from stock options exercised		$ 818
Issuance of special distribution paid primarily in units (in shares)	1,961	1,974
Issuance of special distribution paid in units	$ 160,620	$ 123,529
Cash distributions declared (none of which represented a return of capital for federal income tax purposes)	(235,395)	(410,373)	(341,945)
Ending Balance	$ 4,313,497	$ 4,589,702	$ 4,755,078	$ 5,247,868
Ending Balance (units)	64,380	64,105	66,474	74,672
SL Green Operating Partnership | Common Stock | Partners' Interest | Cumulative Effect, Period of Adoption, Adjustment
Increase (Decrease) in Partner's Capital
Beginning Balance			$ (39,184)
Ending Balance				$ (39,184)
SL Green Operating Partnership | Common Stock | Partners' Interest | Cumulative Effect, Period of Adoption, Adjusted Balance
Increase (Decrease) in Partner's Capital
Beginning Balance			$ 5,208,684
Beginning Balance (units)			74,672
Ending Balance				$ 5,208,684
Ending Balance (units)				74,672
SL Green Operating Partnership | Accumulated Other Comprehensive Income (Loss)
Increase (Decrease) in Partner's Capital
Beginning Balance	$ (46,758)	$ (67,247)	$ (28,485)
Other comprehensive income (loss)	96,362	20,489	(38,762)
Ending Balance	49,604	(46,758)	(67,247)	$ (28,485)
SL Green Operating Partnership | Accumulated Other Comprehensive Income (Loss) | Cumulative Effect, Period of Adoption, Adjusted Balance
Increase (Decrease) in Partner's Capital
Beginning Balance			(28,485)
Ending Balance				(28,485)
SL Green Operating Partnership | Noncontrolling Interests
Increase (Decrease) in Partner's Capital
Beginning Balance	13,377	26,032	75,883
Net income	1,122	(1,884)	14,940
Acquisition of subsidiary interest from noncontrolling interest	(75)		1,587
Contributions to consolidated joint venture interests	52,164	336	12,477
Sale of interest in partially owned entity		(4,476)
Cash distributions to noncontrolling interests	(4,699)	(6,631)	(78,855)
Ending Balance	$ 61,889	$ 13,377	26,032	75,883
SL Green Operating Partnership | Noncontrolling Interests | Cumulative Effect, Period of Adoption, Adjusted Balance
Increase (Decrease) in Partner's Capital
Beginning Balance			$ 75,883
Ending Balance				$ 75,883

Consolidated Statement of Cap_2

Consolidated Statement of Capital (Parenthetical) - $ / shares	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Cash distribution declared, per common share (in dollars per share)	$ 3.6896	$ 6.2729	$ 4.9374
SL Green Operating Partnership
Cash distribution declared, per common share (in dollars per share)	$ 3.6896	$ 6.2729	$ 4.9374

Consolidated Statements of Ca_3

Consolidated Statements of Cash Flows (Partnership) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Operating Activities
Net (loss) income	$ (76,303)	$ 480,632	$ 414,758
Adjustments to reconcile net (loss) income to net cash provided by operating activities:
Depreciation and amortization	223,123	228,293	325,462
Equity in net loss from unconsolidated joint ventures	57,958	55,402	25,195
Distributions of cumulative earnings from unconsolidated joint ventures	780	824	679
Equity in net loss (gain) on sale of interest in unconsolidated joint venture interest/real estate	131	32,757	(2,961)
Purchase price and other fair value adjustments	8,118	(210,070)	(187,522)
Depreciable real estate reserves and impairments	6,313	23,794	60,454
Loss (gain) on sale of real estate, net	84,485	(287,417)	(215,506)
Loan loss reserves and other investment reserves, net of recoveries	0	2,931	35,298
Loss on early extinguishment of debt	0	1,551	0
Deferred rents receivable	(5,749)	(6,701)	(7,582)
Non-cash lease expense	22,403	17,234	11,984
Other non-cash adjustments	(5,676)	37,164	15,178
Changes in operating assets and liabilities:
Tenant and other receivables	14,370	(20,561)	(17,074)
Related party receivables	6,666	(8,727)	1,451
Deferred lease costs	(21,792)	(10,117)	(20,900)
Other assets	(27,343)	20,345	(26,137)
Accounts payable, accrued expenses, other liabilities and security deposits	(30,839)	(66,387)	132,171
Deferred revenue	18,332	(1,727)	20,657
Change in lease liability - operating leases	1,111	(33,241)	(11,369)
Net cash provided by operating activities	276,088	255,979	554,236
Investing Activities
Acquisitions of real estate property	(64,491)	(152,791)	(86,846)
Additions to land, buildings and improvements	(300,770)	(302,486)	(458,140)
Investments in unconsolidated joint ventures	(184,518)	(88,872)	(70,315)
Distributions in excess of cumulative earnings from unconsolidated joint ventures	141,742	770,604	124,572
Net proceeds from disposition of real estate/joint venture interest	626,364	651,594	1,112,382
Cash and restricted cash assumed from acquisition of real estate investment	60,494	0	0
Cash assumed from consolidation of real estate investment	0	9,475	0
Proceeds from sale or redemption of marketable securities	15,626	4,528	0
Purchases of marketable securities	0	(10,000)	0
Other investments	1,432	40,200	32,479
Origination of debt and preferred equity investments	(51,367)	(95,695)	(360,953)
Repayments or redemption of debt and preferred equity investments	181,293	167,024	763,251
Net cash provided by investing activities	425,805	993,581	1,056,430
Financing Activities
Proceeds from mortgages and other loans payable	381,980	39,689	1,181,892
Repayments of mortgages and other loans payable	(292,364)	(375,044)	(1,186,828)
Proceeds from revolving credit facility and senior unsecured notes	1,524,000	1,488,000	1,495,000
Repayments of revolving credit facility and senior unsecured notes	(1,864,000)	(1,808,000)	(1,875,000)
Proceeds from stock options exercised and DRSPP issuance	525	1,556	1,006
Repurchase of common stock	(151,197)	(341,403)	(528,483)
Redemption of preferred stock	(17,967)	(6,040)	(82,750)
Redemption of OP units	(40,901)	(25,703)	(27,342)
Distributions to noncontrolling interests in other partnerships	(4,699)	(6,631)	(85,468)
Contributions from noncontrolling interests in other partnerships	52,164	336	12,477
Acquisition of subsidiary interest from noncontrolling interest	(29,817)	0	(1,536)
Dividends paid on common and preferred stock	(262,136)	(271,075)	(293,996)
Other obligation related to secured borrowing	77,874	51,862	0
Tax withholdings related to restricted share awards	(3,915)	(2,990)	(4,752)
Deferred loan costs	(8,098)	(13,745)	(70,036)
Principal payments of on financing lease liabilities	0	(434)	(833)
Net cash used in financing activities	(654,823)	(1,285,371)	(1,479,301)
Net increase (decrease) in cash, cash equivalents, and restricted cash	47,070	(35,811)	131,365
Cash, cash equivalents, and restricted cash at beginning of year	336,984	372,795	241,430
Cash, cash equivalents, and restricted cash at end of period	384,054	336,984	372,795
Supplemental cash flow disclosures:
Interest paid	169,519	152,773	201,348
Income taxes paid	5,358	4,405	2,296
Supplemental Disclosure of Non-Cash Investing and Financing Activities:
Conversion of units in the Operating Partnership	0	0	8,744
Redemption of units in the Operating Partnership for a joint venture sale	0	27,586	0
Exchange of preferred equity investment for real estate or equity in joint venture	190,652	0	119,497
Exchange of debt investment for real estate or equity in joint venture	193,995	9,468	122,796
Assumption of mortgage and mezzanine loans	1,712,750	60,000	0
Tenant improvements and capital expenditures payable	18,518	7,580	1,665
Fair value adjustment to noncontrolling interest in the Operating Partnership	39,974	9,851	32,598
Investment in joint venture	47,135	0	0
Deconsolidation of a subsidiary	0	66,837	854,437
Deconsolidation of a subsidiary mortgage	0	510,000	5,593
Mortgages assumed in connection with sale of real estate	0	0	250,000
Seller financed purchases	0	0	100,000
Debt and preferred equity investments	302	8,372	9,014
Transfer of assets related to assets held for sale	0	140,855	0
Reversal of assets held for sale	0	0	391,664
Transfer of liabilities related to assets held for sale	0	64,120	0
Extinguishment of debt in connection with property dispositions	0	53,548	0
Consolidation of real estate investment	0	119,444	0
Removal of fully depreciated commercial real estate properties	30,359	19,831	66,169
Sale of interest in partially owned entity	0	4,476	0
Distributions to noncontrolling interests	0	358	6,613
Share repurchase payable	0	0	3,779
Recognition of sales-type leases and related lease liabilities	0	0	119,725
Recognition of right of use assets and related lease liabilities	57,938	537,344	61,990
Cash and cash equivalents	203,273	251,417	266,059
Restricted cash	180,781	85,567	106,736
Total cash, cash equivalents, and restricted cash	384,054	336,984	372,795
SL Green Operating Partnership
Operating Activities
Net (loss) income	(76,303)	480,632	414,758
Adjustments to reconcile net (loss) income to net cash provided by operating activities:
Depreciation and amortization	223,123	228,293	325,462
Equity in net loss from unconsolidated joint ventures	57,958	55,402	25,195
Distributions of cumulative earnings from unconsolidated joint ventures	780	824	679
Equity in net loss (gain) on sale of interest in unconsolidated joint venture interest/real estate	131	32,757	(2,961)
Purchase price and other fair value adjustments	8,118	(210,070)	(187,522)
Depreciable real estate reserves and impairments	6,313	23,794	60,454
Loss (gain) on sale of real estate, net	84,485	(287,417)	(215,506)
Loan loss reserves and other investment reserves, net of recoveries	0	2,931	35,298
Loss on early extinguishment of debt	0	1,551	0
Deferred rents receivable	(5,749)	(6,701)	(7,582)
Non-cash lease expense	22,403	17,234	11,984
Other non-cash adjustments	(5,676)	37,164	15,178
Changes in operating assets and liabilities:
Tenant and other receivables	14,370	(20,561)	(17,074)
Related party receivables	6,666	(8,727)	1,451
Deferred lease costs	(21,792)	(10,117)	(20,900)
Other assets	(27,343)	20,345	(26,137)
Accounts payable, accrued expenses, other liabilities and security deposits	(30,839)	(66,387)	132,171
Deferred revenue	18,332	(1,727)	20,657
Change in lease liability - operating leases	1,111	(33,241)	(11,369)
Net cash provided by operating activities	276,088	255,979	554,236
Investing Activities
Acquisitions of real estate property	(64,491)	(152,791)	(86,846)
Additions to land, buildings and improvements	(300,770)	(302,486)	(458,140)
Investments in unconsolidated joint ventures	(184,518)	(88,872)	(70,315)
Distributions in excess of cumulative earnings from unconsolidated joint ventures	141,742	770,604	124,572
Net proceeds from disposition of real estate/joint venture interest	626,364	651,594	1,112,382
Cash and restricted cash assumed from acquisition of real estate investment	60,494	0	0
Cash assumed from consolidation of real estate investment	0	9,475	0
Proceeds from sale or redemption of marketable securities	15,626	4,528	0
Purchases of marketable securities	0	(10,000)	0
Other investments	1,432	40,200	32,479
Origination of debt and preferred equity investments	(51,367)	(95,695)	(360,953)
Repayments or redemption of debt and preferred equity investments	181,293	167,024	763,251
Net cash provided by investing activities	425,805	993,581	1,056,430
Financing Activities
Proceeds from mortgages and other loans payable	381,980	39,689	1,181,892
Repayments of mortgages and other loans payable	(292,364)	(375,044)	(1,186,828)
Proceeds from revolving credit facility and senior unsecured notes	1,524,000	1,488,000	1,495,000
Repayments of revolving credit facility and senior unsecured notes	(1,864,000)	(1,808,000)	(1,875,000)
Proceeds from stock options exercised and DRSPP issuance	525	1,556	1,006
Repurchase of common stock	(151,197)	(341,403)	(528,483)
Redemption of preferred stock	(17,967)	(6,040)	(82,750)
Redemption of OP units	(40,901)	(25,703)	(27,342)
Distributions to noncontrolling interests in other partnerships	(4,699)	(6,631)	(85,468)
Contributions from noncontrolling interests in other partnerships	52,164	336	12,477
Acquisition of subsidiary interest from noncontrolling interest	(29,817)	0	(1,536)
Dividends paid on common and preferred stock	(278,408)	(286,824)	(306,648)
Other obligation related to secured borrowing	77,874	51,862	0
Tax withholdings related to restricted share awards	(3,915)	(2,990)	(4,752)
Deferred loan costs	(8,098)	(13,745)	(70,036)
Principal payments of on financing lease liabilities	0	(434)	(833)
Net cash used in financing activities	(654,823)	(1,285,371)	(1,479,301)
Net increase (decrease) in cash, cash equivalents, and restricted cash	47,070	(35,811)	131,365
Cash, cash equivalents, and restricted cash at beginning of year	336,984	372,795	241,430
Cash, cash equivalents, and restricted cash at end of period	384,054	336,984	372,795
Supplemental cash flow disclosures:
Interest paid	169,519	152,773	201,348
Income taxes paid	5,358	4,405	2,296
Supplemental Disclosure of Non-Cash Investing and Financing Activities:
Conversion of units in the Operating Partnership	0	0	8,744
Redemption of units in the Operating Partnership for a joint venture sale	0	27,586	0
Exchange of preferred equity investment for real estate or equity in joint venture	190,652	0	119,497
Exchange of debt investment for real estate or equity in joint venture	193,995	9,468	122,796
Assumption of mortgage and mezzanine loans	1,712,750	60,000	0
Issuance of special distribution paid in units	160,620	121,418	0
Tenant improvements and capital expenditures payable	18,518	7,580	1,665
Fair value adjustment to noncontrolling interest in the Operating Partnership	39,974	9,851	32,598
Investment in joint venture	47,135	0	0
Deconsolidation of a subsidiary	0	66,837	854,437
Deconsolidation of a subsidiary mortgage	0	510,000	5,593
Mortgages assumed in connection with sale of real estate	0	0	250,000
Seller financed purchases	0	0	100,000
Debt and preferred equity investments	302	8,372	9,014
Transfer of assets related to assets held for sale	0	140,855	0
Reversal of assets held for sale	0	0	391,664
Transfer of liabilities related to assets held for sale	0	64,120	0
Extinguishment of debt in connection with property dispositions	0	53,548	0
Consolidation of real estate investment	0	119,444	0
Removal of fully depreciated commercial real estate properties	30,359	19,831	66,169
Sale of interest in partially owned entity	0	4,476	0
Distributions to noncontrolling interests	0	358	6,613
Share repurchase payable	0	0	3,779
Recognition of sales-type leases and related lease liabilities	0	0	119,725
Recognition of right of use assets and related lease liabilities	57,938	537,344	61,990
Cash and cash equivalents	203,273	251,417	266,059
Restricted cash	180,781	85,567	106,736
Total cash, cash equivalents, and restricted cash	$ 384,054	$ 336,984	$ 372,795

Consolidated Statements of Ca_4

Consolidated Statements of Cash Flows (Partnership) (Parenthetical) - $ / shares	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Cash distribution declared, per common share (in dollars per share)	$ 3.6896	$ 6.2729	$ 4.9374
Ordinary Dividend
Cash distribution declared, per common share (in dollars per share)	$ 0.2708	0.3108	0.3217
Special Dividend
Cash distribution declared, per common share (in dollars per share)		$ 2.4392
Stock Distribution
Cash distribution declared, per common share (in dollars per share)			$ 1.7996

Organization and Basis of Prese

Organization and Basis of Presentation	12 Months Ended
	Dec. 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 December 31, 2022, noncontrolling investors held, in the aggregate, a 5.39% 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 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 13 9,963,138 12 13,998,381 25 23,961,519 90.7 % Retail 2 17,888 9 301,996 11 319,884 91.2 % Development/Redevelopment (1) 5 1,685,215 3 2,746,241 8 4,431,456 N/A 20 11,666,241 24 17,046,618 44 28,712,859 90.7 % Suburban Office 7 862,800 — — 7 862,800 79.3 % Total commercial properties 27 12,529,041 24 17,046,618 51 29,575,659 90.3 % Residential: Manhattan Residential (2) 1 140,382 — — 1 140,382 89.5 % Total portfolio 28 12,669,423 24 17,046,618 52 29,716,041 90.3 % (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 December 31, 2022, we owned a building at 7 Dey Street / 185 Broadway that was comprised of approximately 140,382 square feet (unaudited) of residential space and approximately 50,206 square feet (unaudited) of office and retail space that is under development. For the purpose of this report, we have included this building in the number of residential properties we own. However, we have included only the residential square footage in the residential approximate square footage, and have listed the balance of the square footage as development square footage. As of December 31, 2022, we also managed 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 $623.3 million, excluding debt and preferred equity investments and other financing receivables totaling $8.5 million 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.

Significant Accounting Policies

Significant Accounting Policies	12 Months Ended
	Dec. 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. A noncontrolling interest in a consolidated subsidiary is defined as the portion of the equity (net assets) in a subsidiary not attributable, directly or indirectly, to us. Noncontrolling interests are required to be presented as a separate component of equity in the consolidated balance sheet and the presentation of net income is modified to present earnings and other comprehensive income attributed to controlling and noncontrolling interests. We assess the accounting treatment for each joint venture and debt and preferred equity investment. This assessment includes a review of each joint venture or limited liability company agreement to determine the rights provided to each party and whether those rights are protective or participating. For all VIEs, we review such agreements in order to determine which party has the power to direct the activities that most significantly impact the entity's economic performance. In situations where we and our partner approve, among other things, the annual budget, receive a detailed monthly reporting package, meet on a quarterly basis to review the results of the joint venture, review and approve the joint venture's tax return before filing, and approve all leases that cover more than a nominal amount of space relative to the total rentable space at each property, we do not consolidate the joint venture as we consider these to be substantive participation rights that result in shared power of the activities that most significantly impact the performance of the joint venture. Our joint venture agreements typically contain certain protective rights such as requiring partner approval to sell, finance or refinance the property and the payment of capital expenditures and operating expenditures outside of the approved budget or operating plan. Investment in Commercial Real Estate Properties Real estate properties are presented at cost less accumulated depreciation and amortization. Costs directly related to the development or redevelopment of properties are capitalized. Ordinary repairs and maintenance are expensed as incurred; major replacements and betterments, which improve or extend the life of the asset, are capitalized and depreciated over their estimated useful lives. We recognize the assets acquired, liabilities assumed (including contingencies) and any noncontrolling interests in an acquired entity at their respective fair values on the acquisition date. When we acquire our partner's equity interest in an existing unconsolidated joint venture and gain control over the investment, we record the consolidated investment at fair value. The difference between the book value of our equity investment on the purchase date and our share of the fair value of the investment's purchase price is recorded as a purchase price fair value adjustment in our consolidated statements of operations. See Note 3, "Property Acquisitions." 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. As of December 31, 2022, the weighted average amortization period for above-market leases, below-market leases, and in-place lease costs is 6.3 years, 7.4 years, and 8.1 years, respectively. 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. We incur a variety of costs in the development and leasing of our properties. After the determination is made to capitalize a cost, it is allocated to the specific component of a project that is benefited. Determination of when a development project is substantially complete and capitalization must cease involves a degree of judgment. The costs of land and building under development include specifically identifiable costs. The capitalized costs include, but are not limited to, pre-construction costs essential to the development of the property, development costs, construction costs, interest costs, real estate taxes, salaries and related costs and other costs incurred during the period of development. We consider a construction project as substantially completed and held available for occupancy upon the completion of tenant improvements, but no later than one year after major construction activity ceases. We cease capitalization on the portions substantially completed and occupied or held available for occupancy, and capitalize only those costs associated with the portions under construction. Properties other than Right of use assets - operating leases are depreciated using the straight-line method over the estimated useful lives of the assets. The estimated useful lives are as follows: Category Term Building (fee ownership) 40 years Building improvements shorter of remaining life of the building or useful life Building (leasehold interest) lesser of 40 years or remaining term of the lease Right of use assets - financing leases lesser of 40 years or remaining lease term Furniture and fixtures 4 to 7 years Tenant improvements shorter of remaining term of the lease or useful life Right of use assets - operating leases are amortized over the remaining lease term. The amortization is made up of the principal amortization under the lease liability plus or minus the straight-line adjustment of the operating lease rent under ASC 842. Depreciation expense (including amortization of right of use assets - financing leases) totaled $190.1 million, $187.3 million, and $277.5 million for the years ended December 31, 2022, 2021 and 2020, respectively. On a periodic basis, we assess whether there are any indications that the value of our real estate properties may be impaired or that their carrying value may not be recoverable. A property's value is considered impaired if management's estimate of the aggregate future cash flows (undiscounted) 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 years ended December 31, 2022 and 2020, we recognized $5.7 million and $5.9 million, respectively, of rental revenue for the amortization of aggregate below-market leases in excess of above-market leases resulting from the allocation of the purchase price of the applicable properties. For the year ended December 31, 2021, we recognized a reduction of rental revenue of ($4.2 million) for the amortization of aggregate above-market leases in excess of below-market leases. The following summarizes our identified intangible assets (acquired above-market leases and in-place leases) and intangible liabilities (acquired below-market leases) as of December 31, 2022 and 2021 (in thousands): December 31, 2022 2021 Identified intangible assets (included in other assets): Gross amount $ 403,552 $ 199,722 Accumulated amortization (190,066) (182,643) Net (1) $ 213,486 $ 17,079 Identified intangible liabilities (included in deferred revenue): Gross amount $ 361,338 $ 212,767 Accumulated amortization (212,191) (210,262) Net (1) $ 149,147 $ 2,505 (1) As of December 31, 2022, no net intangible assets and no net intangible liabilities were reclassified to assets held for sale and 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. The estimated annual amortization of acquired above-market leases, net of acquired (below-market) leases (a component of rental revenue), for each of the five succeeding years is as follows (in thousands): 2023 $ (23,580) 2024 (14,878) 2025 (14,760) 2026 (11,775) 2027 (11,029) The estimated annual amortization of all other identifiable assets (a component of depreciation and amortization expense) including tenant improvements for each of the five succeeding years is as follows (in thousands): 2023 $ 65,130 2024 38,982 2025 37,298 2026 31,381 2027 25,058 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 December 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 (loss) 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 December 31, 2022 and 2021, we held the following marketable securities (in thousands): December 31, 2022 2021 Commercial mortgage-backed securities $ 11,240 $ 24,146 Total marketable securities available-for-sale $ 11,240 $ 24,146 Equity marketable securities $ — $ 10,606 Total investment in marketable securities $ 11,240 $ 34,752 The cost basis of the commercial mortgage-backed securities was $11.5 million and $23.0 million as of December 31, 2022 and 2021, respectively. These securities mature at various times through 2030. All securities were in an unrealized loss position as of December 31, 2022 with an unrealized loss of $0.3 million and fair market value of $11.2 million. The securities were in a continuous loss position for less than 12 months. All securities were in an unrealized gain position as of December 31, 2021 except for one security, which had an unrealized loss of $0.6 million and a fair market value of $7.2 million, and was in a continuous unrealized loss position for more than 12 months. This marketable security was sold at par during the year ended December 31, 2022. We do not intend to sell our other securities, and it is more likely than not that we will not be required to sell the investment before the recovery of their amortized cost basis. During the year ended December 31, 2022, we received aggregate net proceeds of $7.8 million from the sale of one debt marketable security and $3.7 million from the repayment of one debt marketable security. During the year ended December 31, 2021, we received aggregate net proceeds of $4.5 million from the repayment of one debt marketable security. During the year ended December 31, 2020, we did not dispose of any debt marketable securities. We held no equity marketable securities as of December 31, 2022 as we sold the one equity marketable security that was held as of December 31, 2021 during the year ended December 31, 2022, for which we received aggregate net proceeds of $4.2 million. We did not dispose of any equity marketable securities during the year ended December 31, 2021. We recognized $6.5 million of realized losses and $0.6 million of unrealized gains for the years ended December 31, 2022 and 2021, respectively. Investments in Unconsolidated Joint Ventures We account for our investments in unconsolidated joint ventures under the equity method of accounting in cases where we exercise significant influence over, but do not control, these entities and are not considered to be the primary beneficiary. We consolidate those joint ventures that we control or which are variable interest entities (each, a "VIE") and where we are considered to be the primary beneficiary. In all these joint ventures, the rights of the joint venture partner are both protective as well as participating. Unless we are determined to be the primary beneficiary in a VIE, these participating rights preclude us from consolidating these VIE entities. These investments are recorded initially at cost, as investments in unconsolidated joint ventures, and subsequently adjusted for equity in net income (loss) and cash contributions and distributions. Equity in net income (loss) from unconsolidated joint ventures is allocated based on our ownership or economic interest in each joint venture and includes adjustments related to basis differences in accounting for the investment. When a capital event (as defined in each joint venture agreement) such as a refinancing occurs, if return thresholds are met, future equity income will be allocated at our increased economic interest. We recognize incentive income from unconsolidated real estate joint ventures as income to the extent it is earned and not subject to a clawback feature. Distributions we receive from unconsolidated real estate joint ventures in excess of our basis in the investment are recorded as offsets to our investment balance if we remain liable for future obligations of the joint venture or may otherwise be committed to provide future additional financial support. 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. 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 December 31, 2022. We may originate loans for real estate acquisition, development and construction ("ADC loans"), where we expect to receive some of the residual profit from such projects. When the risk and rewards of these arrangements are essentially the same as an investor or joint venture partner, we account for these arrangements as real estate investments under the equity method of accounting for investments. Otherwise, we account for these arrangements consistent with the accounting for our debt and preferred equity investments. 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. Certain of our employees provide leasing services to the wholly-owned properties. For the years ended December 31, 2022, 2021 and 2020, $6.6 million, $6.2 million, and $5.4 million of their compensation, respectively, was capitalized and is amortized over an estimated average lease term of seven years. Deferred Financing Costs Deferred financing costs represent commitment fees, legal, title and other third party costs associated with obtaining commitments for financing which result in a closing of such financing. These costs are amortized over the terms of the respective agreements. Unamortized deferred financing costs are expensed when the associated debt is refinanced or repaid before maturity. Costs incurred in seeking financing transactions, which do not close, are expensed in the period in which it is determined that the financing will not close. Deferred financing costs related to a recognized debt liability are presented in the consolidated balance sheet as a direct deduction from the carrying amount of that debt liability. 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. Rent Expense Rent expense is recognized on a straight-line basis over the initial term of the lease. The excess of the rent expense recognized over the amounts contractually due pursuant to the underlying lease is included in the lease liability - operating leases on the consolidated balance sheets. Underwriting Commissions and Costs Underwriting commissions and costs incurred in connection with our stock offerings are reflected as a reduction of additional paid-in-capital. Transaction Costs Transaction costs for asset acquisitions are capitalized to the investment basis, which is then subject to

Property Acquisitions

Property Acquisitions	12 Months Ended
	Dec. 31, 2022
Business Combination and Asset Acquisition [Abstract]
Property Acquisitions	Property Acquisitions 2022 Acquisitions The following table summarizes the properties acquired during the year ended December 31, 2022: Property Acquisition Date Property Type Approximate Square Feet Gross Asset Valuation 245 Park Avenue (1) September 2022 Fee Interest 1,782,793 $ 1,960.0 (1) 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. On July 8, 2022, certain of the debtors and affiliates of SL Green entered into a Plan Sponsorship and Investment Agreement (the "Plan"), pursuant to which SL Green became the stalking horse bidder for the property. Since the debtors did not receive any qualifying bids for the property and the Plan was confirmed, SL Green acquired full ownership and control of the property in September 2022, at which time our outstanding preferred equity and accrued interest balance were credited to our equity investment in the property. We recorded the assets acquired and liabilities assumed at fair value. See Note 5, "Debt and Preferred Equity Investments" and Note 16, "Fair Value Measurements." 2021 Acquisitions The following table summarizes the properties acquired during the year ended December 31, 2021: Property Acquisition Date Property Type Approximate Square Feet Gross Asset Valuation 885 Third Avenue (1) January 2021 Fee Interest 625,000 $ 387.9 461 Fifth Avenue (2) June 2021 Fee Interest 200,000 28.0 1591-1597 Broadway September 2021 Fee Interest 7,684 121.0 690 Madison Avenue (3) September 2021 Fee Interest 7,848 72.2 (1) In January 2021, pursuant to the partnership documents of our 885 Third Avenue investment, certain participating rights of the common member expired. As a result, it was determined that this investment is a VIE in which we are the primary beneficiary, and the investment was consolidated in our financial statements. Upon consolidating the entity, the assets and liabilities of the entity were recorded at fair value. Prior to January 2021, the investment was accounted for under the equity method. See Note 6, "Investments in Unconsolidated Joint Ventures" and Note 16, "Fair Value Measurements. (2) In April 2021, the Company exercised its option to acquire the fee interest in the property from the ground lessor and the Company acquired the fee interest in June 2021. The Company held the leasehold interest in the property prior to exercising its option. (3) In September 2021, the Company was the successful bidder for the fee interest in 690 Madison Avenue at the foreclosure of the asset. The property previously served as collateral for a debt and preferred equity investment. We recorded the assets acquired and liabilities assumed at fair value. See Note 5, "Debt and Preferred Equity Investments" and Note 16, "Fair Value Measurements." 2020 Acquisitions The following table summarizes the properties acquired during the year ended December 31, 2020: Property Acquisition Date Property Type Approximate Square Feet Gross Asset Valuation 762 Madison Avenue (1) January 2020 Fee Interest 6,109 $ 29.3 707 Eleventh Avenue January 2020 Fee Interest 159,720 90.0 15 Beekman (2) January 2020 Leasehold Interest 98,412 — 590 Fifth Avenue (3) October 2020 Fee Interest 103,300 107.2 (1) The Company acquired from our joint venture partner the remaining 10% interest in this property that the Company did not already own. (2) In January 2020, the Company entered into a 99-year ground lease of 126 Nassau Street and subsequently renamed the property 15 Beekman. In August 2020, we entered into a partnership as part of the capitalization of this development project. See note 6, “Investment in Unconsolidated Joint Ventures.” (3) The property previously served as collateral for a debt and preferred equity investment and was acquired through a negotiated transaction with the sponsor.

Properties Held for Sale and Pr

Properties Held for Sale and Property Dispositions	12 Months Ended
	Dec. 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 December 31, 2022, no properties were classified as held for sale. As of December 31, 2021, 1080 Amsterdam Avenue and 707 Eleventh Avenue were classified as held for sale, as we entered into an agreement to sell the properties, which closed in the first quarter of 2022. The Company recorded a $15.0 million charge in connection with the classification of 707 Eleventh Avenue as held for sale, which is included in Depreciable real estate reserves and impairments in the consolidated statement of operations. Property Dispositions The following table summarizes the properties sold during the years ended December 31, 2022, 2021, and 2020: Property Disposition Date Property Type Unaudited Approximate Usable Square Feet Sales Price (1) (in millions) (Loss) Gain on Sale (2) (in millions) 885 Third Avenue - Office Condominium Units (3) December 2022 Fee / Leasehold Interest 414,317 $ 300.4 $ (24.0) 609 Fifth Avenue June 2022 Fee Interest 138,563 100.5 (80.2) 1591-1597 Broadway May 2022 Fee Interest 7,684 121.0 (4.5) 1080 Amsterdam Avenue April 2022 Leasehold Interest 85,250 42.7 17.9 707 Eleventh Avenue February 2022 Fee Interest 159,720 95.0 (0.8) 110 East 42nd Street December 2021 Fee Interest 215,400 117.1 3.6 590 Fifth Avenue October 2021 Fee Interest 103,300 103.0 (3.2) 220 East 42nd Street (4) July 2021 Fee Interest 1,135,000 783.5 175.1 635-641 Sixth Avenue June 2021 Fee Interest 267,000 325.0 99.4 106 Spring Street (5) March 2021 Fee Interest 5,928 35.0 (2.8) 133 Greene Street (5) February 2021 Fee Interest 6,425 15.8 0.2 712 Madison Avenue (6) January 2021 Fee Interest 6,600 43.0 (1.4) 30 East 40th Street December 2020 Leasehold Interest 69,446 5.2 (1.6) 1055 Washington Boulevard December 2020 Leasehold Interest 182,000 23.8 (11.5) Williamsburg Terrace December 2020 Fee Interest 52,000 32.0 11.8 410 Tenth Avenue December 2020 Fee Interest 638,000 952.5 56.4 400 East 58th Street September 2020 Fee Interest 140,000 62.0 8.3 609 Fifth Avenue - Retail Condominium May 2020 Fee Interest 21,437 168.0 63.3 315 West 33rd Street - The Olivia March 2020 Fee Interest 492,987 446.5 71.8 (1) Sales price represents the gross sales price for a property or the gross asset valuation for interests in a property. (2) The (losses) gains on sale are net of $11.2 million, $13.7 million, and $10.5 million of employee compensation accrued in connection with the realization of the investment dispositions during the years ended December 31, 2022, 2021, and 2020, respectively. Additionally, amounts do not include adjustments for expenses recorded in subsequent periods. (3) In December 2022, the Company sold 414,317 square feet of office leasehold condominium units at the property. The Company retained the remaining 218,796 square feet of the building. (4) In July 2021, the Company sold a 49% interest, which resulted in the Company no longer retaining a controlling interest in the entity, as defined in ASC 810, and the deconsolidation of the 51.0% interest we retained. We recorded our investment at fair value which resulted in the recognition of a fair value adjustment of $206.8 million, which is reflected in the Company's consolidated statements of operations within Purchase price and other fair value adjustments. See Note 6, "Investments in Unconsolidated Joint Ventures." (5) In March 2021, the property was foreclosed by the lender. (6) Disposition resulted from the ground lessee exercising its purchase option under a ground lease arrangement.

Debt and Preferred Equity Inves

Debt and Preferred Equity Investments	12 Months Ended
	Dec. 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 years ended December 31, 2022 and 2021 (in thousands): December 31, 2022 December 31, 2021 Balance at beginning of year (1) $ 1,088,723 $ 1,076,542 Debt investment originations/fundings/accretion (2) 62,992 193,824 Preferred equity investment originations/accretion (2) 37,505 13,220 Redemptions/sales/syndications/equity ownership/amortization (565,940) (201,446) Net change in loan loss reserves — 6,583 Balance at end of period (1) $ 623,280 $ 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. Below is a summary of our debt and preferred equity investments as of December 31, 2022 (dollars in thousands): Floating Rate Fixed Rate Total Carrying Value Senior Financing Maturity (1) Type Carrying Value Face Value Interest Rate Carrying Value Face Value Interest Rate Mezzanine Debt $ 144,056 $ 144,402 L + 4.95 - 12.38% $ 359,366 $ 367,461 7.00 - 14.30% $ 503,422 $ 1,691,780 2023 - 2029 Preferred Equity — — — 119,858 119,858 6.50% 119,858 250,000 2027 Balance at end of period $ 144,056 $ 144,402 $ 479,224 $ 487,319 $ 623,280 $ 1,941,780 (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 years ended December 31, 2022, 2021 and 2020 (in thousands): December 31, 2022 2021 2020 Balance at beginning of year $ 6,630 $ 13,213 $ 1,750 Cumulative adjustment upon adoption of ASC 326 — — 27,803 Current period provision for loan loss — — 20,693 Write-offs charged against the allowance — (6,583) (37,033) Balance at end of period (1) $ 6,630 $ 6,630 $ 13,213 (1) As of December 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 December 31, 2022 and 2021, all debt and preferred equity investments were performing in accordance with their respective terms, with the exception of one investment with a carrying value, net of reserves, of $6.9 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 December 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 December 31, 2022 and 2021 (dollars in thousands): Risk Rating December 31, 2022 December 31, 2021 1 - Low Risk Assets - Low probability of loss $ 264,069 $ 644,489 2 - Watch List Assets - Higher potential for loss 352,321 437,344 3 - High Risk Assets - Loss more likely than not 6,890 6,890 $ 623,280 $ 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 December 31, 2022 (dollars in thousands): As of December 31, Risk Rating 2022 (1) 2021 (1) 2020 (1) Prior (1) Total 1 - Low Risk Assets - Low probability of loss $ — $ — $ 174,985 $ 89,084 $ 264,069 2 - Watch List Assets - Higher potential for loss — 77,109 — 275,212 352,321 3 - High Risk Assets - Loss more likely than not — — — 6,890 6,890 $ — $ 77,109 $ 174,985 $ 371,186 $ 623,280 (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 December 31, 2022 and 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 $9.0 million and $10.5 million as of December 31, 2022 and 2021, respectively. The Company recorded no provisions for loan losses related to these financing receivables for the years ended December 31, 2022 and 2021, respectively. All of these loans have a risk rating of 2 and were performing in accordance with their respective terms. One loan with a carrying value of $5.8 million was put on non-accrual in July 2020 and remains on non-accrual as of December 31, 2022. No investment income has been recognized subsequent to it being put on non-accrual. Debt Investments As of December 31, 2022 and 2021, we held the following debt investments with an aggregate weighted average current yield of 6.46%, as of December 31, 2022 (dollars in thousands): Loan Type December 31, 2022 December 31, 2022 December 31, 2022 Carrying Value (1) December 31, 2021 Carrying Value (1) Maturity Date (2) Fixed Rate Investments: Mezzanine Loan (3) $ — $ 401,269 $ 225,367 $ 225,367 June 2023 Mezzanine Loan — 283,293 77,109 66,873 June 2023 Mezzanine Loan (4)(5) — 105,000 13,366 13,366 June 2024 Mezzanine Loan — 95,000 30,000 30,000 January 2025 Mezzanine Loan — 85,000 20,000 20,000 December 2029 Mezzanine Loan — — — 43,521 Mortgage Loan — — — 73,000 Mezzanine Loan (6) — — — 55,250 Total fixed rate $ — $ 969,562 $ 365,842 $ 527,377 Floating Rate Investments: Mezzanine Loan $ — $ 275,000 $ 50,000 $ 49,998 April 2023 Mezzanine Loan 3,761 54,000 8,243 8,050 May 2023 Mezzanine Loan 17,924 207,134 46,884 30,802 May 2023 Mezzanine Loan — 186,084 39,083 37,511 July 2023 Mezzanine Loan (7) — — — 133,735 Mortgage and Mezzanine Loan — — — 34,874 Total floating rate $ 21,685 $ 722,218 $ 144,210 $ 294,970 Allowance for loan loss $ — $ — $ (6,630) $ (6,630) Total $ 21,685 $ 1,691,780 $ 503,422 $ 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 December 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 a $12.0 million participation that was sold and did not meet the conditions for sale accounting, which is included in Other assets and Other liabilities on the consolidated balance sheets as a result. (5) This loan went into default and was put on non-accrual in June 2020 and remains on non-accrual as of December 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) In September 2022, the Company successfully acquired full ownership and control of the property at 245 Park Avenue. See below table and Note 3, "Property Acquisitions." (7) In September 2022, the Company converted its mezzanine loan position secured by the equity interest in 5 Times Square to an equity interest in a joint venture partnership with the existing equity holders. See Note 6, " Investments in Unconsolidated Joint Ventures." Preferred Equity Investments As of December 31, 2022 and 2021, we held the following preferred equity investments with an aggregate weighted average current yield of 6.55% as of December 31, 2022 (dollars in thousands): Type December 31, 2022 December 31, 2022 December 31, 2022 (1) December 31, 2021 (1) Mandatory Redemption (2) Preferred Equity $ — $ 250,000 $ 119,858 $ 112,234 February 2027 Preferred Equity (3) — — — 160,772 Total Preferred Equity $ — $ 250,000 $ 119,858 $ 273,006 Allowance for loan loss $ — $ — $ — $ — Total $ — $ 250,000 $ 119,858 $ 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. On July 8, 2022, certain of the debtors and affiliates of SL Green entered into the Plan, pursuant to which SL Green became the stalking horse bidder for the property. Since the debtors did not receive any qualifying bids for the property and the Plan was confirmed, SL Green acquired full ownership and control of the property in September 2022, at which time our outstanding preferred equity and accrued interest balance were credited to our equity investment in the property. See Note 3, "Property Acquisitions."

Investments in Unconsolidated J

Investments in Unconsolidated Joint Ventures	12 Months Ended
	Dec. 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 December 31, 2022, the book value of these investments was $3.2 billion, net of investments with negative book values totaling $110.2 million for which we have an implicit commitment to fund future capital needs. As of December 31, 2022, 800 Third Avenue and 21 East 66th Street are VIEs in which we are not the primary beneficiary. As of December 31, 2021, 800 Third Avenue, 21 East 66th Street, and certain properties within the Stonehenge Portfolio are VIEs in which we were not the primary beneficiary. Our net equity investment in these VIEs was $86.2 million as of December 31, 2022 and $85.6 million as of December 31, 2021. 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 December 31, 2022: Property Partner Ownership Interest (1) Economic Interest (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 (5) Wharton Properties 50.00% 50.00% 7,131 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% 1,135,000 450 Park Avenue (8) Korean Institutional Investor / Israeli Institutional Investor 50.10% 25.10% 337,000 5 Times Square (9) RXR Realty led investment group 31.55% 31.55% 1,131,735 (1) Ownership interest and economic interest represent the Company's interests in the joint venture as of December 31, 2022. Changes in ownership or economic interests within the current year are disclosed in the notes below. (2) The joint venture 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) During the fourth quarter of 2022, the Company recorded a $6.3 million charge in connection with the pending sale of this investment for a gross consideration of approximately $14.0 million, which closed in February 2023. This charge is included in Depreciable real estate reserves and impairments in the consolidated statement of operations. (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. 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 $501.8 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 December 31, 2022, the total of the two partners' ownership interests based on equity contributed was 40.0%. 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 December 31, 2022 and 2021. (8) The 50.1% ownership interest reflected in this table is comprised of our 25.1% economic interest and a 25.0% economic interest held by a third-party. The third-party's economic interest is held within a joint venture that we consolidate and recognize in Noncontrolling interests in other partnerships on our consolidated balance sheet. An additional third-party owns the remaining 49.9% economic interest in the property. (9) In September 2022, the Company converted its mezzanine loan position secured by the equity interest in 5 Times Square to an equity interest in a joint venture partnership with the existing equity holders. See Note 5, " Debt and Preferred Equity Investments." Disposition of Joint Venture Interests or Properties The following table summarizes the investments in unconsolidated joint ventures sold during the years ended December 31, 2022, 2021, and 2020: Property Ownership Interest Sold Disposition Date Gross Asset Valuation (Loss) Gain on Sale (in millions) (1) (2) Stonehenge Portfolio Various April 2022 $ 1.0 $ — 400 East 57th Street (3) 41.00% September 2021 133.5 (1.0) 605 West 42nd Street - Sky 20.00% June 2021 858.1 8.9 55 West 46th Street - Tower 46 25.00% March 2021 275.0 (15.2) 885 Third Avenue (4) N/A January 2021 N/A N/A 333 East 22nd Street 33.33% December 2020 1.6 3.0 (1) Represents the Company's share of the gain or loss (2) For the year ended December 31, 2021, the (losses) gains on sale are net of $1.4 million of employee compensation accrued in connection with the realization of the investment dispositions. There were no amounts accrued for employee compensation in the years ended December 31, 2022 and 2020. Additionally, amounts do not include adjustments for expenses recorded in subsequent periods. (3) In connection with our agreement to sell the property in April 2021, we recorded a charge of $5.7 million, which is included in Depreciable real estate reserves and impairments in the consolidated statements of operations. (4) In January 2021, pursuant to the partnership documents, certain participating rights of the common member expired. As a result, it was determined that we are the primary beneficiary of the VIE and the investment was consolidated in our financial statements. See Note 3, "Property Acquisitions." 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 December 31, 2022 and 2021, respectively, are as follows (dollars in thousands): Property Economic Interest (1) Current Maturity Date Final Maturity Date (2) Interest Rate (3) December 31, 2022 December 31, 2021 Fixed Rate Debt: 717 Fifth Avenue 10.92 % July 2022 (4) July 2022 (4) 5.02% $ 655,328 $ 655,328 650 Fifth Avenue 50.00 % April 2023 April 2023 5.45% 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% 500,000 500,000 220 East 42nd Street 51.00 % June 2023 June 2025 5.75% 510,000 — 280 Park Avenue 50.00 % September 2023 September 2024 5.81% 1,200,000 — 5 Times Square 31.55 % September 2024 September 2026 7.00% 400,000 — 10 East 53rd Street 55.00 % February 2025 February 2025 5.35% 220,000 — 1515 Broadway 56.87 % March 2025 March 2025 3.93% 782,321 801,845 450 Park Avenue 25.10 % June 2025 June 2027 6.10% 267,000 — 11 Madison Avenue 60.00 % September 2025 September 2025 3.84% 1,400,000 1,400,000 One Madison Avenue (5) 25.50 % November 2025 November 2026 3.94% 467,008 — 800 Third Avenue 60.52 % February 2026 February 2026 3.48% 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 3,000,000 650 Fifth Avenue — 275,000 Stonehenge Portfolio — 195,493 Total fixed rate debt $ 10,855,657 $ 8,216,666 Floating Rate Debt: 1552 Broadway 50.00 % December 2022 (6) December 2022 (6) L+ 2.65% $ 193,132 $ 193,132 11 West 34th Street 30.00 % January 2023 (7) January 2023 (7) L+ 1.45% 23,000 23,000 650 Fifth Avenue 50.00 % April 2023 April 2023 S+ 2.50% 210,000 — 121 Greene Street 50.00 % May 2023 May 2023 S+ 2.10% 12,550 13,228 115 Spring Street 51.00 % September 2023 September 2023 L+ 3.40% 65,550 65,550 2 Herald Square 51.00 % November 2023 November 2023 S+ 2.06% 182,500 200,989 100 Park Avenue 49.90 % December 2023 December 2025 L+ 2.25% 360,000 360,000 15 Beekman (8) 20.00 % January 2024 July 2025 L+ 1.50% 86,738 43,566 5 Times Square 31.55 % September 2024 September 2026 S+ 5.77% 495,924 — 21 East 66th Street 32.28 % June 2033 June 2033 T+ 2.75% 586 632 220 East 42nd Street — 510,000 280 Park Avenue — 1,200,000 10 East 53rd Street — 220,000 One Madison Avenue — 169,629 Total floating rate debt $ 1,629,980 $ 2,999,726 Total joint venture mortgages and other loans payable $ 12,485,637 $ 11,216,392 Deferred financing costs, net (136,683) (130,516) Total joint venture mortgages and other loans payable, net $ 12,348,954 $ 11,085,876 (1) Economic interest represents the Company's interests in the joint venture as of December 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 December 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"), Term SOFR ("S") or 1-year Treasury ("T"). (4) This loan matured in July 2022. The Company is in discussions with the lender on a resolution. (5) 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. (6) In January 2023, the maturity date of the loan was extended by one month. (7) This loan matured in February 2023. The Company is in discussions with the lender on a resolution. (8) This loan is a $125.0 million construction facility. Advances under the loan are subject to costs incurred. We are entitled to receive fees for providing management, leasing, construction supervision and asset management services to certain of our joint ventures. We earned $24.0 million, $19.6 million and $15.8 million from these services, net of our ownership share of the joint ventures, for the years ended December 31, 2022, 2021, and 2020, 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, as of December 31, 2022 and 2021, are as follows (in thousands): December 31, 2022 December 31, 2021 Assets (1) Commercial real estate property, net $ 15,989,642 $ 14,763,874 Cash and restricted cash 709,299 768,510 Tenant and other receivables, related party receivables, and deferred rents receivable 601,552 533,455 Other assets 2,551,426 1,776,030 Total assets $ 19,851,919 $ 17,841,869 Liabilities and equity (1) Mortgages and other loans payable, net $ 12,348,954 $ 11,085,876 Deferred revenue/gain 1,077,901 1,158,242 Lease liabilities 1,000,356 980,595 Other liabilities 456,537 352,499 Equity 4,968,171 4,264,657 Total liabilities and equity $ 19,851,919 $ 17,841,869 Company's investments in unconsolidated joint ventures $ 3,190,137 $ 2,997,934 (1) As of December 31, 2022, $547.6 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 years ended December 31, 2022, 2021, and 2020 are as follows (unaudited, in thousands): Year Ended December 31, 2022 2021 2020 Total revenues $ 1,339,364 $ 1,228,364 $ 1,133,217 Operating expenses 240,002 203,332 180,201 Real estate taxes 252,806 225,104 220,633 Operating lease rent 26,152 22,576 24,134 Interest expense, net of interest income 431,865 342,910 325,500 Amortization of deferred financing costs 27,754 31,423 20,427 Depreciation and amortization 465,100 484,130 407,834 Total expenses $ 1,443,679 $ 1,309,475 $ 1,178,729 Loss on early extinguishment of debt (467) (2,017) (194) Net loss before (loss) gain on sale $ (104,782) $ (83,128) $ (45,706) Company's equity in net loss from unconsolidated joint ventures $ (57,958) $ (55,402) $ (25,195)

Deferred Costs

Deferred Costs	12 Months Ended
	Dec. 31, 2022
Deferred Costs, Capitalized, Prepaid, and Other Assets Disclosure [Abstract]
Deferred Costs	Deferred Costs Deferred costs as of December 31, 2022 and 2021 consisted of the following (in thousands): December 31, 2022 2021 Deferred leasing costs $ 407,188 $ 400,419 Less: accumulated amortization (286,031) (275,924) Deferred costs, net $ 121,157 $ 124,495

Mortgages and Other Loans Payab

Mortgages and Other Loans Payable	12 Months Ended
	Dec. 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 December 31, 2022 and 2021, respectively, were as follows (dollars in thousands): Property Current Maturity Date Final Maturity Date (1) Interest Rate (2) December 31, 2022 December 31, 2021 Fixed Rate Debt: 719 Seventh Avenue September 2023 September 2023 4.70% $ 50,000 $ — 7 Dey / 185 Broadway (3) November 2023 November 2023 7.59% 200,000 — 420 Lexington Avenue October 2024 October 2040 3.99% 283,064 288,660 100 Church Street June 2025 June 2027 5.89% 370,000 — Landmark Square January 2027 January 2027 4.90% 100,000 100,000 485 Lexington Avenue February 2027 February 2027 4.25% 450,000 450,000 245 Park Avenue June 2027 June 2027 4.22% 1,712,750 — 100 Church Street — 200,212 1080 Amsterdam — 34,537 Total fixed rate debt $ 3,165,814 $ 1,073,409 Floating Rate Debt: 7 Dey / 185 Broadway (3) November 2023 November 2023 S+ 2.85% $ 10,148 $ — 690 Madison Avenue July 2024 July 2025 L+ 1.50% 60,000 60,000 719 Seventh Avenue — 50,000 609 Fifth Avenue — 52,882 7 Dey / 185 Broadway (3) — 198,169 Total floating rate debt $ 70,148 $ 361,051 Total fixed rate and floating rate debt $ 3,235,962 $ 1,434,460 Mortgages reclassed to liabilities related to assets held for sale — (34,537) Total mortgages and other loans payable $ 3,235,962 $ 1,399,923 Deferred financing costs, net of amortization (8,399) (5,537) Total mortgages and other loans payable, net $ 3,227,563 $ 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 December 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 Term SOFR ("S"), unless otherwise specified. (3) 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. Both extension options were exercised in October 2021 and 2022, respectively. Advances under the loan are subject to incurred costs and funded equity requirements.. As of December 31, 2022 and 2021, the gross book value of the properties collateralizing the mortgages and other loans payable was approximately $3.8 billion and $2.1 billion, respectively. Federal Home Loan Bank of New York ("FHLB") Facility As of December 31, 2020, the Company’s wholly-owned subsidiary, Ticonderoga Insurance Company, or Ticonderoga, a Vermont licensed captive insurance company, was a member of the Federal Home Loan Bank of New York, or FHLBNY. As a member, Ticonderoga was able to borrow funds from the FHLBNY in the form of secured advances that bore interest at a floating rate. As a result of a Final Ruling from the Federal Housing Finance Authority, the regulator of the Federal Home Loan Bank system, all captive insurance company memberships were terminated as of February 2021. As such, all advances to Ticonderoga were repaid prior to such termination. Master Repurchase Agreement The Company entered into a Master Repurchase Agreement, or MRA, known as the 2017 MRA, which provided us with the ability to sell certain mortgage investments with a simultaneous agreement to repurchase the same at a certain date or on demand. In April 2018, we increased the maximum facility capacity from $300.0 million to $400.0 million. The facility bore interest on a floating rate basis at a spread to 30-day LIBOR based on the pledged collateral and advanced rate. The facility matured in June 2022 and was not extended. 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 December 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 December 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 December 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 December 31, 2022, the facility fee was 25 basis points. As of December 31, 2022, we had $2.0 million of outstanding letters of credit, $450.0 million drawn under the revolving credit facility and $1.25 billion outstanding under the term loan facilities, with total undrawn capacity of $800.0 million under the 2021 credit facility. As of December 31, 2022 and December 31, 2021, the revolving credit facility had a carrying value of $443.2 million and $381.3 million, respectively, net of deferred financing costs. As of December 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). 2022 Term Loan In October 2022, we entered into a term loan agreement, referred to as the 2022 term loan. As of December 31, 2022, the 2022 term loan consisted of a $400.0 million term loan with a maturity date of October 6, 2023. The 2022 term loan has one six-month as-of-right extension option to April 6, 2024. We also have an option, subject to customary conditions, to increase the capacity of the 2022 term loan to $500.0 million on or before January 7, 2023 without the consent of existing lenders, by obtaining additional commitments from our existing lenders and other financial institutions. In January 2023, the 2022 term loan was increased by $25.0 million to $425.0 million. As of December 31, 2022, the 2022 term loan bore interest at a spread over adjusted Term SOFR plus 10 basis points, ranging from 100 basis points to 180 basis points, 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 December 31, 2022, the applicable spread over adjusted Term SOFR plus 10 basis points was 140 basis points. As of December 31, 2022, the 2022 term loan had a carrying value of $398.2 million, net of deferred financing costs. The Company and the Operating Partnership are borrowers jointly and severally obligated under the 2022 term loan. The 2022 term loan 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 December 31, 2022 and 2021, respectively, by scheduled maturity date (dollars in thousands): Issuance December 31, December 31, December 31, Interest Rate (1) Initial Term Maturity Date December 17, 2015 (2) $ 100,000 $ 100,000 $ 100,000 4.27 % 10 December 2025 October 5, 2017 (3) — — 499,913 3.25 % 5 October 2022 November 15, 2012 — — 301,002 4.50 % 10 December 2022 $ 100,000 $ 100,000 $ 900,915 Deferred financing costs, net (308) (1,607) $ 100,000 $ 99,692 $ 899,308 (1) Interest rate as of December 31, 2022, taking into account interest rate hedges in effect during the period. (2) Issued by the Company and the Operating Partnership as co-obligors. (3) Issued by the Operating Partnership with the Company as the guarantor. Restrictive Covenants The terms of the 2021 credit facility, 2022 term loan 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 December 31, 2022 and 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, the 2022 term loan, trust preferred securities, senior unsecured notes and our share of joint venture debt as of December 31, 2022, including as-of-right extension options, were as follows (in thousands): Scheduled Principal Revolving Unsecured Term Loans Trust Senior Total Joint 2023 $ 5,827 $ 260,148 $ — $ — $ — $ — $ 265,975 $ 1,155,465 2024 4,488 332,749 — 600,000 — — 937,237 894,655 2025 — 370,000 — — — 100,000 470,000 1,466,750 2026 — — — — — — — 226,224 2027 — 2,262,750 450,000 1,000,000 — — 3,712,750 299,417 Thereafter — — — 50,000 100,000 — 150,000 2,130,404 $ 10,315 $ 3,225,647 $ 450,000 $ 1,650,000 $ 100,000 $ 100,000 $ 5,535,962 $ 6,172,915 Consolidated interest expense, excluding capitalized interest, was comprised of the following (in thousands): Year Ended December 31, 2022 2021 2020 Interest expense before capitalized interest $ 166,493 $ 145,197 $ 185,934 Interest on financing leases 4,555 5,448 8,091 Interest capitalized (82,444) (78,365) (75,167) Amortization of discount on assumed debt 1,855 — — Interest income (986) (1,389) (2,179) Interest expense, net $ 89,473 $ 70,891 $ 116,679

Corporate Indebtedness

Corporate Indebtedness	12 Months Ended
	Dec. 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 December 31, 2022 and 2021, respectively, were as follows (dollars in thousands): Property Current Maturity Date Final Maturity Date (1) Interest Rate (2) December 31, 2022 December 31, 2021 Fixed Rate Debt: 719 Seventh Avenue September 2023 September 2023 4.70% $ 50,000 $ — 7 Dey / 185 Broadway (3) November 2023 November 2023 7.59% 200,000 — 420 Lexington Avenue October 2024 October 2040 3.99% 283,064 288,660 100 Church Street June 2025 June 2027 5.89% 370,000 — Landmark Square January 2027 January 2027 4.90% 100,000 100,000 485 Lexington Avenue February 2027 February 2027 4.25% 450,000 450,000 245 Park Avenue June 2027 June 2027 4.22% 1,712,750 — 100 Church Street — 200,212 1080 Amsterdam — 34,537 Total fixed rate debt $ 3,165,814 $ 1,073,409 Floating Rate Debt: 7 Dey / 185 Broadway (3) November 2023 November 2023 S+ 2.85% $ 10,148 $ — 690 Madison Avenue July 2024 July 2025 L+ 1.50% 60,000 60,000 719 Seventh Avenue — 50,000 609 Fifth Avenue — 52,882 7 Dey / 185 Broadway (3) — 198,169 Total floating rate debt $ 70,148 $ 361,051 Total fixed rate and floating rate debt $ 3,235,962 $ 1,434,460 Mortgages reclassed to liabilities related to assets held for sale — (34,537) Total mortgages and other loans payable $ 3,235,962 $ 1,399,923 Deferred financing costs, net of amortization (8,399) (5,537) Total mortgages and other loans payable, net $ 3,227,563 $ 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 December 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 Term SOFR ("S"), unless otherwise specified. (3) 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. Both extension options were exercised in October 2021 and 2022, respectively. Advances under the loan are subject to incurred costs and funded equity requirements.. As of December 31, 2022 and 2021, the gross book value of the properties collateralizing the mortgages and other loans payable was approximately $3.8 billion and $2.1 billion, respectively. Federal Home Loan Bank of New York ("FHLB") Facility As of December 31, 2020, the Company’s wholly-owned subsidiary, Ticonderoga Insurance Company, or Ticonderoga, a Vermont licensed captive insurance company, was a member of the Federal Home Loan Bank of New York, or FHLBNY. As a member, Ticonderoga was able to borrow funds from the FHLBNY in the form of secured advances that bore interest at a floating rate. As a result of a Final Ruling from the Federal Housing Finance Authority, the regulator of the Federal Home Loan Bank system, all captive insurance company memberships were terminated as of February 2021. As such, all advances to Ticonderoga were repaid prior to such termination. Master Repurchase Agreement The Company entered into a Master Repurchase Agreement, or MRA, known as the 2017 MRA, which provided us with the ability to sell certain mortgage investments with a simultaneous agreement to repurchase the same at a certain date or on demand. In April 2018, we increased the maximum facility capacity from $300.0 million to $400.0 million. The facility bore interest on a floating rate basis at a spread to 30-day LIBOR based on the pledged collateral and advanced rate. The facility matured in June 2022 and was not extended. 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 December 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 December 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 December 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 December 31, 2022, the facility fee was 25 basis points. As of December 31, 2022, we had $2.0 million of outstanding letters of credit, $450.0 million drawn under the revolving credit facility and $1.25 billion outstanding under the term loan facilities, with total undrawn capacity of $800.0 million under the 2021 credit facility. As of December 31, 2022 and December 31, 2021, the revolving credit facility had a carrying value of $443.2 million and $381.3 million, respectively, net of deferred financing costs. As of December 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). 2022 Term Loan In October 2022, we entered into a term loan agreement, referred to as the 2022 term loan. As of December 31, 2022, the 2022 term loan consisted of a $400.0 million term loan with a maturity date of October 6, 2023. The 2022 term loan has one six-month as-of-right extension option to April 6, 2024. We also have an option, subject to customary conditions, to increase the capacity of the 2022 term loan to $500.0 million on or before January 7, 2023 without the consent of existing lenders, by obtaining additional commitments from our existing lenders and other financial institutions. In January 2023, the 2022 term loan was increased by $25.0 million to $425.0 million. As of December 31, 2022, the 2022 term loan bore interest at a spread over adjusted Term SOFR plus 10 basis points, ranging from 100 basis points to 180 basis points, 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 December 31, 2022, the applicable spread over adjusted Term SOFR plus 10 basis points was 140 basis points. As of December 31, 2022, the 2022 term loan had a carrying value of $398.2 million, net of deferred financing costs. The Company and the Operating Partnership are borrowers jointly and severally obligated under the 2022 term loan. The 2022 term loan 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 December 31, 2022 and 2021, respectively, by scheduled maturity date (dollars in thousands): Issuance December 31, December 31, December 31, Interest Rate (1) Initial Term Maturity Date December 17, 2015 (2) $ 100,000 $ 100,000 $ 100,000 4.27 % 10 December 2025 October 5, 2017 (3) — — 499,913 3.25 % 5 October 2022 November 15, 2012 — — 301,002 4.50 % 10 December 2022 $ 100,000 $ 100,000 $ 900,915 Deferred financing costs, net (308) (1,607) $ 100,000 $ 99,692 $ 899,308 (1) Interest rate as of December 31, 2022, taking into account interest rate hedges in effect during the period. (2) Issued by the Company and the Operating Partnership as co-obligors. (3) Issued by the Operating Partnership with the Company as the guarantor. Restrictive Covenants The terms of the 2021 credit facility, 2022 term loan 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 December 31, 2022 and 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, the 2022 term loan, trust preferred securities, senior unsecured notes and our share of joint venture debt as of December 31, 2022, including as-of-right extension options, were as follows (in thousands): Scheduled Principal Revolving Unsecured Term Loans Trust Senior Total Joint 2023 $ 5,827 $ 260,148 $ — $ — $ — $ — $ 265,975 $ 1,155,465 2024 4,488 332,749 — 600,000 — — 937,237 894,655 2025 — 370,000 — — — 100,000 470,000 1,466,750 2026 — — — — — — — 226,224 2027 — 2,262,750 450,000 1,000,000 — — 3,712,750 299,417 Thereafter — — — 50,000 100,000 — 150,000 2,130,404 $ 10,315 $ 3,225,647 $ 450,000 $ 1,650,000 $ 100,000 $ 100,000 $ 5,535,962 $ 6,172,915 Consolidated interest expense, excluding capitalized interest, was comprised of the following (in thousands): Year Ended December 31, 2022 2021 2020 Interest expense before capitalized interest $ 166,493 $ 145,197 $ 185,934 Interest on financing leases 4,555 5,448 8,091 Interest capitalized (82,444) (78,365) (75,167) Amortization of discount on assumed debt 1,855 — — Interest income (986) (1,389) (2,179) Interest expense, net $ 89,473 $ 70,891 $ 116,679

Related Party Transactions

Related Party Transactions	12 Months Ended
	Dec. 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, were previously 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 $1.4 million, $1.7 million and $1.4 million for the years ended December 31, 2022, 2021 and 2020, respectively. We also recorded expenses, inclusive of capitalized expenses, of $8.6 million, $14.0 million and $13.3 million for the years ended December 31, 2022, 2021 and 2020, 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 $0.6 million, $0.7 million and $0.6 million for the years ended December 31, 2022, 2021, and 2020 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 (inclusive of the property and Summit One Vanderbilt) 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 have the right to tender their interests in the project upon stabilization (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 a tender of the interests will equal the liquidation value of the interests at the time, with the value being based on the project's sale price, if applicable, or fair market value as determined by an independent third party appraiser. In 2022, stabilization of the property (but not Summit One Vanderbilt) was achieved. Therefore, Messrs. Holiday and Mathias exercised their rights to tender 50% of their interests in the property (but not Summit One Vanderbilt) for liquidation values of $17.9 million and $11.9 million, respectively, which were paid in July 2022. 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 years ended December 31, 2022 and 2021 we recorded $3.0 million and $2.4 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 operations in October 2021. For the year ended December 31, 2022, we recorded $33.0 million of rent expense under the lease, including percentage rent, of which $22.8 million was recognized as income as a component of Equity in net loss from unconsolidated joint ventures in our consolidated statements of operations. For the year ended December 31, 2021, we recorded $5.0 million of rent expense under the lease with no percentage rent. See Note 20, "Commitments and Contingencies." 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 December 31, 2022 and 2021 consisted of the following (in thousands): December 31, 2022 2021 Due from joint ventures $ 26,812 $ 28,204 Other 540 1,204 Related party receivables $ 27,352 $ 29,408

Noncontrolling Interests on the

Noncontrolling Interests on the Company's Consolidated Financial Statements	12 Months Ended
	Dec. 31, 2022
Noncontrolling Interest [Abstract]
Noncontrolling Interests on the Company's Consolidated Financial Statements	Noncontrolling Interests on the Company's Consolidated Financial Statements Noncontrolling interests represent the common and preferred units of limited partnership interest in the Operating Partnership not held by the Company as well as third party equity interests in our other consolidated subsidiaries. Noncontrolling interests in the Operating Partnership are shown in the mezzanine equity while the noncontrolling interests in our other consolidated subsidiaries are shown in the equity section of the Company’s consolidated financial statements. Common Units of Limited Partnership Interest in the Operating Partnership As of December 31, 2022 and 2021, the noncontrolling interest unit holders owned 5.39%, or 3,670,343 units, and 5.57%, or 3,781,565 units, of the Operating Partnership, respectively. As of December 31, 2022, 3,670,343 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 twelve months ended December 31, 2022 and 2021 (in thousands): December 31, 2022 2021 Balance at beginning of period $ 344,252 $ 358,262 Distributions (16,272) (15,749) Issuance of common units 22,855 18,678 Redemption and conversion of common units (40,901) (53,289) Net (loss) income (5,794) 25,457 Accumulated other comprehensive income allocation 5,827 1,042 Fair value adjustment (39,974) 9,851 Balance at end of period $ 269,993 $ 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 December 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 unit holder 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 December 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 twelve months ended December 31, 2022 and 2021 (in thousands): December 31, 2022 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 (6,198) (6,760) Accrued dividends on preferred units 6,033 6,706 Balance at end of period $ 177,943 $ 196,075

Stockholders' Equity of the Com

Stockholders' Equity of the Company	12 Months Ended
	Dec. 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 December 31, 2022, 64,380,082 shares of common stock and no shares of excess stock were issued and outstanding. 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 December 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 Year ended 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 years ended December 31, 2022, 2021, and 2020, respectively (dollars in thousands): Year Ended December 31, 2022 2021 2020 Shares of common stock issued 10,839 10,387 16,181 Dividend reinvestments/stock purchases under the DRSPP $ 525 $ 738 $ 1,006 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 years ended December 31, 2022, 2021, and 2020 are computed as follows (in thousands): Year Ended December 31, Numerator 2022 2021 2020 Basic Earnings: (Loss) income attributable to SL Green common stockholders $ (93,024) $ 434,804 $ 356,105 Less: distributed earnings allocated to participating securities (2,219) (2,398) (1,685) Less: undistributed earnings allocated to participating securities — (192) (137) Net (loss) income attributable to SL Green common stockholders (numerator for basic earnings per share) $ (95,243) $ 432,214 $ 354,283 Add back: dilutive effect of earnings allocated to participating securities and contingently issuable shares — 2,039 1,685 Add back: undistributed earnings allocated to participating securities — 192 137 Add back: Effect of dilutive securities (redemption of units to common shares) (5,794) 25,457 20,016 (Loss) income attributable to SL Green common stockholders (numerator for diluted earnings per share) $ (101,037) $ 459,902 $ 376,121 Year Ended December 31, Denominator 2022 2021 2020 Basic Shares: Weighted average common stock outstanding 63,917 65,740 70,397 Effect of Dilutive Securities: Operating Partnership units redeemable for common shares 4,012 3,987 4,096 Stock-based compensation plans — 705 441 Contingently issuable shares — 337 144 Diluted weighted average common stock outstanding 67,929 70,769 75,078 The Company has excluded 1,682,236 common stock equivalents from the calculation of diluted shares outstanding for the year ended December 31, 2022. The Company has excluded 948,017 and 1,676,825 of common stock equivalents from the calculation of diluted shares outstanding for the years ended December 31, 2021 and 2020, respectively. The Company is the sole managing general partner of the Operating Partnership and as of December 31, 2022 owned 64,380,082 general and limited partnership interests in the Operating Partnership and 9,200,000 Series I Preferred Units. Partnership interests in the Operating Partnership are denominated as “common units of limited partnership interest” (also referred to as “OP Units”) or “preferred units of limited partnership interest” (also referred to as “Preferred Units”). All references to OP Units and Preferred Units outstanding exclude such units held by the Company. A holder of an OP Unit may present such OP Unit to the Operating Partnership for redemption at any time (subject to restrictions agreed upon at the issuance of OP Units to particular holders that may restrict such right for a period of time, generally one year from issuance). Upon presentation of an OP Unit for redemption, the Operating Partnership must redeem such OP Unit in exchange for the cash equal to the then value of a share of common stock of the Company, except that the Company may, at its election, in lieu of cash redemption, acquire such OP Unit for one share of common stock. Because the number of shares of common stock outstanding at all times equals the number of OP Units that the Company owns, one share of common stock is generally the economic equivalent of one OP Unit, and the quarterly distribution that may be paid to the holder of an OP Unit equals the quarterly dividend that may be paid to the holder of a share of common stock. Each series of Preferred Units makes a distribution that is set in accordance with an amendment to the partnership agreement of the Operating Partnership. Preferred Units may also be convertible into OP Units at the election of the holder thereof or the Company, subject to the terms of such Preferred Units. Net income (loss) allocated to the preferred unitholders and common unitholders reflects their pro rata share of net income (loss) and distributions. Limited Partner Units As of December 31, 2022, limited partners other than SL Green owned 3,670,343 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 years ended December 31, 2022, 2021, and 2020 respectively are computed as follows (in thousands): Year Ended December 31, Numerator 2022 2021 2020 Basic Earnings: Net (loss) income attributable to SLGOP common unitholders (numerator for diluted earnings per unit) $ (98,818) $ 460,261 $ 376,121 Less: distributed earnings allocated to participating securities (2,219) (2,398) (1,685) Less: undistributed earnings allocated to participating securities — (192) (137) Net (loss) income attributable to SLGOP common unitholders (numerator for basic earnings per unit) $ (101,037) $ 457,671 $ 374,299 Add back: dilutive effect of earnings allocated to participating securities and contingently issuable shares — 2,590 1,822 (Loss) income attributable to SLGOP common unitholders $ (101,037) $ 460,261 $ 376,121 Year Ended December 31, Denominator 2022 2021 2020 Basic units: Weighted average common units outstanding 67,929 69,667 74,493 Effect of Dilutive Securities: Stock-based compensation plans — 765 441 Contingently issuable units — 337 144 Diluted weighted average common units outstanding 67,929 70,769 75,078 The Operating Partnership has excluded 1,682,236 common unit equivalents from the diluted units outstanding for the years ended December 31, 2022. The Operating Partnership has excluded 948,017 and 1,676,825 common unit equivalents from the diluted units outstanding for the years ended December 31, 2021 and 2020, respectively.

Partners' Capital of the Operat

Partners' Capital of the Operating Partnership	12 Months Ended
	Dec. 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 December 31, 2022, 64,380,082 shares of common stock and no shares of excess stock were issued and outstanding. 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 December 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 Year ended 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 years ended December 31, 2022, 2021, and 2020, respectively (dollars in thousands): Year Ended December 31, 2022 2021 2020 Shares of common stock issued 10,839 10,387 16,181 Dividend reinvestments/stock purchases under the DRSPP $ 525 $ 738 $ 1,006 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 years ended December 31, 2022, 2021, and 2020 are computed as follows (in thousands): Year Ended December 31, Numerator 2022 2021 2020 Basic Earnings: (Loss) income attributable to SL Green common stockholders $ (93,024) $ 434,804 $ 356,105 Less: distributed earnings allocated to participating securities (2,219) (2,398) (1,685) Less: undistributed earnings allocated to participating securities — (192) (137) Net (loss) income attributable to SL Green common stockholders (numerator for basic earnings per share) $ (95,243) $ 432,214 $ 354,283 Add back: dilutive effect of earnings allocated to participating securities and contingently issuable shares — 2,039 1,685 Add back: undistributed earnings allocated to participating securities — 192 137 Add back: Effect of dilutive securities (redemption of units to common shares) (5,794) 25,457 20,016 (Loss) income attributable to SL Green common stockholders (numerator for diluted earnings per share) $ (101,037) $ 459,902 $ 376,121 Year Ended December 31, Denominator 2022 2021 2020 Basic Shares: Weighted average common stock outstanding 63,917 65,740 70,397 Effect of Dilutive Securities: Operating Partnership units redeemable for common shares 4,012 3,987 4,096 Stock-based compensation plans — 705 441 Contingently issuable shares — 337 144 Diluted weighted average common stock outstanding 67,929 70,769 75,078 The Company has excluded 1,682,236 common stock equivalents from the calculation of diluted shares outstanding for the year ended December 31, 2022. The Company has excluded 948,017 and 1,676,825 of common stock equivalents from the calculation of diluted shares outstanding for the years ended December 31, 2021 and 2020, respectively. The Company is the sole managing general partner of the Operating Partnership and as of December 31, 2022 owned 64,380,082 general and limited partnership interests in the Operating Partnership and 9,200,000 Series I Preferred Units. Partnership interests in the Operating Partnership are denominated as “common units of limited partnership interest” (also referred to as “OP Units”) or “preferred units of limited partnership interest” (also referred to as “Preferred Units”). All references to OP Units and Preferred Units outstanding exclude such units held by the Company. A holder of an OP Unit may present such OP Unit to the Operating Partnership for redemption at any time (subject to restrictions agreed upon at the issuance of OP Units to particular holders that may restrict such right for a period of time, generally one year from issuance). Upon presentation of an OP Unit for redemption, the Operating Partnership must redeem such OP Unit in exchange for the cash equal to the then value of a share of common stock of the Company, except that the Company may, at its election, in lieu of cash redemption, acquire such OP Unit for one share of common stock. Because the number of shares of common stock outstanding at all times equals the number of OP Units that the Company owns, one share of common stock is generally the economic equivalent of one OP Unit, and the quarterly distribution that may be paid to the holder of an OP Unit equals the quarterly dividend that may be paid to the holder of a share of common stock. Each series of Preferred Units makes a distribution that is set in accordance with an amendment to the partnership agreement of the Operating Partnership. Preferred Units may also be convertible into OP Units at the election of the holder thereof or the Company, subject to the terms of such Preferred Units. Net income (loss) allocated to the preferred unitholders and common unitholders reflects their pro rata share of net income (loss) and distributions. Limited Partner Units As of December 31, 2022, limited partners other than SL Green owned 3,670,343 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 years ended December 31, 2022, 2021, and 2020 respectively are computed as follows (in thousands): Year Ended December 31, Numerator 2022 2021 2020 Basic Earnings: Net (loss) income attributable to SLGOP common unitholders (numerator for diluted earnings per unit) $ (98,818) $ 460,261 $ 376,121 Less: distributed earnings allocated to participating securities (2,219) (2,398) (1,685) Less: undistributed earnings allocated to participating securities — (192) (137) Net (loss) income attributable to SLGOP common unitholders (numerator for basic earnings per unit) $ (101,037) $ 457,671 $ 374,299 Add back: dilutive effect of earnings allocated to participating securities and contingently issuable shares — 2,590 1,822 (Loss) income attributable to SLGOP common unitholders $ (101,037) $ 460,261 $ 376,121 Year Ended December 31, Denominator 2022 2021 2020 Basic units: Weighted average common units outstanding 67,929 69,667 74,493 Effect of Dilutive Securities: Stock-based compensation plans — 765 441 Contingently issuable units — 337 144 Diluted weighted average common units outstanding 67,929 70,769 75,078 The Operating Partnership has excluded 1,682,236 common unit equivalents from the diluted units outstanding for the years ended December 31, 2022. The Operating Partnership has excluded 948,017 and 1,676,825 common unit equivalents from the diluted units outstanding for the years ended December 31, 2021 and 2020, respectively.

Share-based Compensation

Share-based Compensation	12 Months Ended
	Dec. 31, 2022
Share-Based Payment Arrangement [Abstract]
Share-based Compensation	Share-based CompensationWe 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 Fifth Amended and Restated 2005 Stock Option and Incentive Plan, or the 2005 Plan, was approved by the Company's Board of Directors in April 2022 and its stockholders in June 2022 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 32,210,000 fungible units may be granted under the 2005 Plan. Currently, different types of awards count against the limit on the number of fungible units differently, with (1) full-value awards (i.e., those that deliver the full value of the award upon vesting, such as restricted stock) counting as 2.59 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 0.84 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 fifth amendment and restatement in June 2022 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 32,210,000 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 1, 2032, which is the tenth anniversary of the date that the 2005 Plan was most recently approved by the Company's stockholders. As of December 31, 2022, 6.3 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. 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 years ended December 31, 2022, 2021, and 2020. A summary of the status of the Company's stock options as of December 31, 2022, 2021, and 2020 and changes during the years ended December 31, 2022, 2021, and 2020 are as follows: 2022 2021 2020 Options Outstanding Weighted Average Options Outstanding Weighted Average Options Weighted Balance at beginning of year 394,089 $ 100.56 761,686 $ 105.76 977,745 $ 108.57 Exercised — — (11,314) 72.30 — — Lapsed or canceled (80,609) 112.14 (356,283) 112.56 (216,059) 118.49 Balance at end of year 313,480 $ 97.59 394,089 $ 100.56 761,686 $ 105.76 Options exercisable at end of year 313,480 $ 97.59 394,089 $ 100.56 760,743 $ 105.76 The remaining weighted average contractual life of the options outstanding was 1.9 years and the remaining average contractual life of the options exercisable was 1.9 years. During the years ended December 31, 2022, 2021, and 2020, we recognized no compensation expense related to options. As of December 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 December 31, 2022, 2021, and 2020 and changes during the years ended December 31, 2022, 2021, and 2020 are as follows: 2022 2021 2020 Balance at beginning of year 3,459,363 3,337,545 3,362,456 Granted 314,995 141,515 8,693 Canceled (16,184) (19,697) (33,604) Balance at end of year 3,758,174 3,459,363 3,337,545 Vested during the year 118,255 122,759 125,064 Compensation expense recorded $ 10,133,905 $ 8,497,054 $ 10,895,459 Total fair value of restricted stock granted during the year $ 16,804,931 $ 9,214,531 $ 734,315 The fair value of restricted stock that vested during the years ended December 31, 2022, 2021, and 2020 was $9.7 million, $11.3 million and $12.5 million, respectively. As of December 31, 2022, there was $12.5 million of total unrecognized compensation cost related to restricted stock, which is expected to be recognized over a weighted average period of 2.0 years. We granted LTIP Units, which include bonus, time-based and performance-based awards, with a fair value of $45.0 million and $55.0 million during the years ended December 31, 2022 and 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 December 31, 2022, there was $45.7 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 1.6 years. During the years ended December 31, 2022, 2021, and 2020, we recorded compensation expense related to bonus, time-based and performance-based awards of $43.5 million, $41.9 million, and $29.4 million, respectively. For the years ended December 31, 2022, 2021, and 2020, $1.8 million, $2.1 million, and $2.2 million, respectively, 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 year ended December 31, 2022, 27,436 phantom stock units and 9,571 shares of common stock were issued to our Board of Directors. We recorded compensation expense of $2.7 million during the year ended December 31, 2022 related to the Deferred Compensation Plan. As of December 31, 2022, there were 192,638 phantom stock units outstanding pursuant to our Non-Employee Director's Deferral Program. Employee Stock Purchase Plan In 2007, the Company's Board of Directors adopted the 2008 Employee Stock Purchase Plan, or ESPP, to provide equity-based incentives to eligible employees. The ESPP is intended to qualify as an "employee stock purchase plan" under Section 423 of the Code, and has been adopted by the board to enable our eligible employees to purchase the Company's shares of common stock through payroll deductions. The ESPP became effective on January 1, 2008 with a maximum of 500,000 shares of the common stock available for issuance, subject to adjustment upon a merger, reorganization, stock split or other similar corporate change. The Company filed a registration statement on Form S-8 with the SEC with respect to the ESPP. The common stock is offered for purchase through a series of successive offering periods. Each offering period will be three months in duration and will begin on the first day of each calendar quarter, with the first offering period having commenced on January 1, 2008. The ESPP provides for eligible employees to purchase the common stock at a purchase price equal to 85% of the lesser of (1) the market value of the common stock on the first day of the offering period or (2) the market value of the common stock on the last day of the offering period. The ESPP was approved by our stockholders at our 2008 annual meeting of stockholders. As of December 31, 2022, 191,845 shares of our common stock had been issued under the ESPP.

Accumulated Other Comprehensive

Accumulated Other Comprehensive Income (Loss)	12 Months Ended
	Dec. 31, 2022
Equity [Abstract]
Accumulated Other Comprehensive Income (Loss)	Accumulated Other Comprehensive Income (Loss) The following tables set forth the changes in accumulated other comprehensive (loss) income by component as of December 31, 2022, 2021 and 2020 (in thousands): Net unrealized gain (loss) on derivative instruments ( 1 ) SL Green’s share of joint venture net unrealized gain (loss) on derivative instruments ( 2 ) Net unrealized gain (loss) on marketable securities Total Balance at December 31, 2019 $ (22,780) $ (7,982) $ 2,277 $ (28,485) Other comprehensive loss before reclassifications (48,532) (7,573) (1,256) (57,361) Amounts reclassified from accumulated other comprehensive loss 13,897 4,702 — 18,599 Balance at December 31, 2020 (57,415) (10,853) 1,021 (67,247) Other comprehensive income (loss) before reclassifications 14,908 (18,015) 96 (3,011) Amounts reclassified from accumulated other comprehensive loss 16,626 6,874 — 23,500 Balance at December 31, 2021 (25,881) (21,994) 1,117 (46,758) Other comprehensive income (loss) before reclassifications 78,300 23,405 (1,359) 100,346 Amounts reclassified from accumulated other comprehensive income (4,619) 635 — (3,984) Balance at December 31, 2022 $ 47,800 $ 2,046 $ (242) $ 49,604 (1) Amount reclassified from accumulated other comprehensive income (loss) is included in interest expense in the respective consolidated statements of operations. As of December 31, 2022 and 2021, the deferred net gains from these terminated hedges, which is included in accumulated other comprehensive income (loss) relating to net unrealized gain (loss) on derivative instruments, was ($0.5 million) and ($0.6 million), respectively. (2) Amount reclassified from accumulated other comprehensive income (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	12 Months Ended
	Dec. 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 December 31, 2022 and 2021 (in thousands): December 31, 2022 Total Level 1 Level 2 Level 3 Assets: Marketable securities available-for-sale $ 11,240 $ — $ 11,240 $ — Interest rate cap and swap agreements (included in Other assets) $ 57,660 $ — $ 57,660 $ — Liabilities: Interest rate cap and swap agreements (included in Other liabilities) $ 10,142 $ — $ 10,142 $ — 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. In September 2022, the Company recorded at fair value the assets acquired and liabilities assumed at 245 Park Avenue. This fair value was determined using a third-party valuation which primarily utilized 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. In September 2021, the Company was the successful bidder at the foreclosure of 690 Madison Avenue, at which time the company, at which time the Company's outstanding principal and accrued interest balance were credited to our equity investment in the property as it previously served as collateral for a debt and preferred equity investment. We recorded the assets acquired and liabilities assumed at fair value. This fair value was determined using a third-party valuation which primarily utilized 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. In July 2021, the Company sold a 49% interest in its 220 East 42nd Street investment, which resulted in the Company no longer retaining a controlling interest in the entity, as defined in ASC 810, and the deconsolidation of the 51.0% interest we retained. We recorded our investment at fair value which resulted in the recognition of a fair value adjustment of $206.8 million during the year ended December 31, 2021. The fair value of our investment was determined by the terms of the joint venture agreement. In January 2021, pursuant to the partnership documents of our 885 Third Ave investments, certain participating rights of the common member expired. As a result, it was determined that this investment is a VIE in which we are the primary beneficiary, and the investment was consolidated in our financial statements. Upon consolidating the entity, the assets and liabilities of the entity were recorded at fair value. This fair value was determined using a third-party valuation which primarily utilized 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 December 31, 2022 and December 31, 2021 (in thousands): December 31, 2022 December 31, 2021 Carrying Value (1) Fair Value Carrying Value (1) Fair Value Debt and preferred equity investments $ 623,280 (2) $ 1,088,723 (2) Fixed rate debt $ 5,015,814 $ 4,784,691 $ 3,274,324 $ 3,336,463 Variable rate debt 520,148 519,669 801,051 800,672 Total debt $ 5,535,962 $ 5,304,360 $ 4,075,375 $ 4,137,135 (1) Amounts exclude net deferred financing costs. (2) As of December 31, 2022, debt and preferred equity investments had an estimated fair value ranging between $0.6 billion and $0.6 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_ Derivati

Financial Instruments: Derivatives and Hedging	12 Months Ended
	Dec. 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 December 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 Swap $ 100,000 0.212 % January 2021 January 2023 Other Assets $ 333 Interest Rate Swap 400,000 0.184 % January 2022 February 2023 Other Assets 1,453 Interest Rate Swap 50,000 0.633 % February 2022 February 2023 Other Assets 158 Interest Rate Cap 370,000 3.250 % December 2022 June 2023 Other Assets 2,471 Interest Rate Cap 370,000 3.250 % December 2022 June 2023 Other Liabilities (2,465) Interest Rate Swap 100,000 1.163 % November 2021 July 2023 Other Assets 2,133 Interest Rate Swap 200,000 1.133 % November 2021 July 2023 Other Assets 4,300 Interest Rate Cap 600,000 4.080 % September 2022 September 2023 Other Liabilities (3,341) Interest Rate Cap 50,000 3.500 % October 2022 September 2023 Other Assets 505 Interest Rate Swap 200,000 4.739 % November 2022 November 2023 Other Assets 104 Interest Rate Cap 196,717 3.500 % November 2022 November 2023 Other Assets 2,232 Interest Rate Cap 196,717 3.500 % November 2022 November 2023 Other Liabilities (2,225) Interest Rate Swap 150,000 2.700 % December 2021 January 2024 Other Assets 3,249 Interest Rate Swap 200,000 4.590 % November 2022 January 2024 Other Assets 593 Interest Rate Swap 200,000 4.511 % November 2022 January 2024 Other Assets 750 Interest Rate Swap 150,000 2.721 % December 2021 January 2026 Other Assets 5,848 Interest Rate Swap 200,000 2.762 % December 2021 January 2026 Other Assets 7,601 Interest Rate Swap 100,000 3.003 % February 2023 February 2027 Other Assets 3,264 Interest Rate Swap 100,000 2.833 % February 2023 February 2027 Other Assets 3,888 Interest Rate Swap 50,000 2.563 % February 2023 February 2027 Other Assets 2,441 Interest Rate Swap 200,000 2.691 % February 2023 February 2027 Other Assets 8,823 Interest Rate Swap 300,000 2.966 % July 2023 May 2027 Other Assets 7,514 Interest Rate Swap 370,000 3.888 % November 2022 June 2027 Other Liabilities (1,900) Interest Rate Swap 100,000 3.756 % January 2023 January 2028 Other Liabilities (211) $ 47,518 During the year ended December 31, 2022, we recorded a loss of $1.7 million based on the changes in the fair value of interest rate caps we sold, which is included in Purchase price and other fair value adjustments in the consolidated statements of operations. No interest rate caps were sold during the years ended December 31, 2021 and 2020. During the years ended December 31, 2022, 2021, and 2020, we recorded losses of $0.3 million, $0.0 million, and $0.1 million, respectively, on the changes in the fair value, which is included in interest expense in the consolidated statements of operations. The Company frequently 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 December 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 $10.5 million. As of December 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 $10.9 million as of December 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 income (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 ($35.9 million) of the current balance held in accumulated other comprehensive income (loss) will be reclassified in interest expense and ($11.6 million) of the portion related to our share of joint venture accumulated other comprehensive income (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 years ended December 31, 2022, 2021, and 2020, respectively (in thousands): Amount of Gain (Loss) Location of Gain (Loss) Reclassified from Accumulated Other Comprehensive Income (Loss) into Income Amount of Gain (Loss) Reclassified from Year Ended Year Ended Derivative 2022 2021 2020 2022 2021 2020 Interest Rate Swaps/Caps $ 83,162 $ 15,643 $ (51,244) Interest expense $ 4,989 $ (17,602) $ (14,569) Share of unconsolidated joint ventures' derivative instruments 24,783 (19,400) (7,977) Equity in net loss from unconsolidated joint ventures (673) (7,582) (4,911) $ 107,945 $ (3,757) $ (59,221) $ 4,316 $ (25,184) $ (19,480) The following table summarizes the notional value at inception and fair value of our joint ventures' derivative financial instruments as of December 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 Value Strike Rate Effective Date Expiration Date Classification Fair Value Interest Rate Cap $ 23,000 4.750 % January 2021 January 2023 $ — Interest Rate Cap 220,000 4.000 % February 2022 February 2023 93 Interest Rate Cap 510,000 3.000 % December 2021 June 2023 4,220 Interest Rate Cap 267,000 4.000 % July 2022 August 2023 1,289 Interest Rate Cap 400,000 3.500 % September 2022 September 2023 3,839 Interest Rate Cap 1,075,000 4.080 % September 2022 September 2023 6,004 Interest Rate Cap 125,000 4.080 % September 2022 September 2023 698 Interest Rate Cap 118,670 0.490 % February 2022 May 2024 22,669 Interest Rate Cap 118,670 0.490 % February 2022 May 2024 22,652 Interest Rate Swap 177,000 1.669 % December 2022 February 2026 12,576 $ 74,040

Lease Income

Lease Income	12 Months Ended
	Dec. 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. Future minimum rents to be received over the next five years and thereafter for operating leases in effect at December 31, 2022 are as follows (in thousands): 2023 $ 596,648 2024 569,125 2025 543,287 2026 486,771 2027 415,123 Thereafter 1,718,650 $ 4,329,604 The components of lease income from operating leases in effect at December 31, 2022 and 2021 were as follows (in thousands): Twelve Months Ended December 31, 2022 2021 Fixed lease payments $ 594,541 $ 600,474 Variable lease payments 82,676 73,542 Total lease payments (1) $ 677,217 $ 674,016 Amortization of acquired above and below-market leases (5,717) 4,160 Total rental revenue $ 671,500 $ 678,176 (1) Amounts include $222.1 million and $229.2 million of sublease income for the years ended December 31, 2022 and 2021, respectively. The table below summarizes our investment in sales-type leases as of December 31, 2022: Property Year of Current Expiration Year of Final Expiration (1) 15 Beekman (2) 2089 2089 (1) Reflects exercise of all available renewal options. (2) In August 2020, the Company formed a joint venture, which then entered into a long-term sublease with the Company for the building at 15 Beekman. See Note 6, "Investments in Unconsolidated Joint Ventures." Future minimum lease payments to be received over the next five years and thereafter for our sales-type leases with initial terms in excess of one year as of December 31, 2022 are as follows (in thousands): Sales-type leases 2023 $ 3,133 2024 3,180 2025 3,228 2026 3,276 2027 3,325 Thereafter 200,169 Total minimum lease payments $ 216,311 Amount representing interest (111,988) Investment in sales-type leases (1) $ 104,323 (1) This amount is included in Other assets in our consolidated balance sheets. The components of lease income from sales-type leases during the years ended December 31, 2022 and 2021 were as follows (in thousands): Twelve Months Ended December 31, 2022 2021 Interest income (1) $ 4,389 $ 4,422 (1) These amounts are included in Other income in our consolidated statements of operations.
Lease Income	18. 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. Future minimum rents to be received over the next five years and thereafter for operating leases in effect at December 31, 2022 are as follows (in thousands): 2023 $ 596,648 2024 569,125 2025 543,287 2026 486,771 2027 415,123 Thereafter 1,718,650 $ 4,329,604 The components of lease income from operating leases in effect at December 31, 2022 and 2021 were as follows (in thousands): Twelve Months Ended December 31, 2022 2021 Fixed lease payments $ 594,541 $ 600,474 Variable lease payments 82,676 73,542 Total lease payments (1) $ 677,217 $ 674,016 Amortization of acquired above and below-market leases (5,717) 4,160 Total rental revenue $ 671,500 $ 678,176 (1) Amounts include $222.1 million and $229.2 million of sublease income for the years ended December 31, 2022 and 2021, respectively. The table below summarizes our investment in sales-type leases as of December 31, 2022: Property Year of Current Expiration Year of Final Expiration (1) 15 Beekman (2) 2089 2089 (1) Reflects exercise of all available renewal options. (2) In August 2020, the Company formed a joint venture, which then entered into a long-term sublease with the Company for the building at 15 Beekman. See Note 6, "Investments in Unconsolidated Joint Ventures." Future minimum lease payments to be received over the next five years and thereafter for our sales-type leases with initial terms in excess of one year as of December 31, 2022 are as follows (in thousands): Sales-type leases 2023 $ 3,133 2024 3,180 2025 3,228 2026 3,276 2027 3,325 Thereafter 200,169 Total minimum lease payments $ 216,311 Amount representing interest (111,988) Investment in sales-type leases (1) $ 104,323 (1) This amount is included in Other assets in our consolidated balance sheets. The components of lease income from sales-type leases during the years ended December 31, 2022 and 2021 were as follows (in thousands): Twelve Months Ended December 31, 2022 2021 Interest income (1) $ 4,389 $ 4,422 (1) These amounts are included in Other income in our consolidated statements of operations.

Benefit Plans

Benefit Plans	12 Months Ended
	Dec. 31, 2022
Retirement Benefits [Abstract]
Benefit Plans	Benefit Plans The building employees are covered by multi-employer defined benefit pension plans and post-retirement health and welfare plans. We participate in the Building Service 32BJ, or Union, Pension Plan and Health Plan. The Pension Plan is a multi-employer, non-contributory defined benefit pension plan that was established under the terms of collective bargaining agreements between the Service Employees International Union, Local 32BJ, the Realty Advisory Board on Labor Relations, Inc. and certain other employees. This Pension Plan is administered by a joint board of trustees consisting of union trustees and employer trustees and operates under employer identification number 13-1879376. The Pension Plan year runs from July 1 to June 30. Employers contribute to the Pension Plan at a fixed rate on behalf of each covered employee. Separate actuarial information regarding such pension plans is not made available to the contributing employers by the union administrators or trustees, since the plans do not maintain separate records for each reporting unit. However, on September 27, 2020, September 28, 2021 and September 28, 2022, the actuary certified that for the plan years beginning July 1, 2020, July 1, 2021 and July 1, 2022, the Pension Plan was in critical or endangered status under the Pension Protection Act of 2006. The Pension Plan trustees adopted a rehabilitation plan consistent with this requirement. No surcharges have been paid to the Pension Plan as of December 31, 2022. As of the date of this report, information was not yet available for the Pension Plan year ended June 30, 2022. For the Pension Plan years ended June 30, 2021 and 2020, the plan received contributions from employers totaling $290.1 million and $291.3 million, respectively. Our contributions to the Pension Plan represent less than 5.0% of total contributions to the plan. The Health Plan was established under the terms of collective bargaining agreements between the Union, the Realty Advisory Board on Labor Relations, Inc. and certain other employers. The Health Plan provides health and other benefits to eligible participants employed in the building service industry who are covered under collective bargaining agreements, or other written agreements, with the Union. The Health Plan is administered by a Board of Trustees with equal representation by the employers and the Union and operates under employer identification number 13-2928869. The Health Plan receives contributions in accordance with collective bargaining agreements or participation agreements. Generally, these agreements provide that the employers contribute to the Health Plan at a fixed rate on behalf of each covered employee. As of the date of this report, information was not yet available for the Health Plan year ended June 30, 2022. For the Health Plan years ended, June 30, 2021 and 2020, the plan received contributions from employers totaling $1.5 billion and $1.6 billion, respectively. Our contributions to the Health Plan represent less than 5.0% of total contributions to the plan. Contributions we made to the multi-employer plans for the years ended December 31, 2022, 2021 and 2020 are included in the table below (in thousands): Benefit Plan 2022 2021 2020 Pension Plan $ 1,952 $ 1,994 $ 2,480 Health Plan 6,386 6,333 7,688 Other plans 807 849 929 Total plan contributions $ 9,145 $ 9,176 $ 11,097 401(K) Plan In August 1997, we implemented a 401(K) Savings/Retirement Plan, or the 401(K) Plan, to cover eligible employees of ours, and any designated affiliate. The 401(K) Plan permits eligible employees to defer up to 15% of their annual compensation, subject to certain limitations imposed by the Code. The employees' elective deferrals are immediately vested and non-forfeitable upon contribution to the 401(K) Plan. During 2003, we amended our 401(K) Plan to provide for discretionary matching contributions only. For 2022, 2021 and 2020, a matching contribution equal to 100% of the first 4% of annual compensation was made. For the years ended December 31, 2022, 2021 and 2020, we made matching contributions of $1.5 million, $1.5 million, and $1.7 million, respectively.

Commitments and Contingencies

Commitments and Contingencies	12 Months Ended
	Dec. 31, 2022
Commitments and Contingencies Disclosure [Abstract]
Commitments and Contingencies	Commitments and Contingencies Legal Proceedings As of December 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. Environmental Matters Our management believes that the properties are in compliance in all material respects with applicable Federal, state and local ordinances and regulations regarding environmental issues. Management is not aware of any environmental liability that it believes would have a materially adverse impact on our financial position, results of operations or cash flows. Management is unaware of any instances in which it would incur significant environmental cost if any of our properties were sold. Employment Agreements We have entered into employment agreements with certain executives, which expire between July 2023 and January 2025. The minimum cash-based compensation, including base salary and guaranteed bonus payments, associated with these employment agreements total $3.4 million for 2023. Insurance We maintain “all-risk” property and rental value coverage (including coverage regarding the perils of flood, earthquake and terrorism, excluding nuclear, biological, chemical, and radiological terrorism ("NBCR"), within two property insurance programs and liability insurance. Separate property and liability coverage may be purchased on a stand-alone basis for certain assets, such as development projects. Additionally, one of our captive insurance companies, Belmont Insurance Company, or Belmont, provides coverage for NBCR terrorist acts above a specified trigger. Belmont's retention is reinsured by our other captive insurance company, Ticonderoga Insurance Company ("Ticonderoga"). If Belmont or Ticonderoga are required to pay a claim under our insurance policies, we would ultimately record the loss to the extent of required payments. However, there is no assurance that in the future we will be able to procure coverage at a reasonable cost. Further, if we experience losses that are uninsured or that exceed policy limits, we could lose the capital invested in the damaged properties as well as the anticipated future cash flows from those properties. Additionally, our debt instruments contain customary covenants requiring us to maintain insurance and we could default under our debt instruments if the cost and/or availability of certain types of insurance make it impractical or impossible to comply with such covenants relating to insurance. Belmont and Ticonderoga provide coverage solely on properties owned by the Company or its affiliates. Furthermore, with respect to certain of our properties, including properties held by joint ventures or subject to triple net leases, insurance coverage is obtained by a third-party and we do not control the coverage. While we may have agreements with such third parties to maintain adequate coverage and we monitor these policies, such coverage ultimately may not be maintained or adequately cover our risk of loss. Belmont had loss reserves of $3.1 million and $2.9 million as of December 31, 2022 and 2021, respectively. Ticonderoga had no loss reserves as of December 31, 2022 and 2021. Lease Arrangements We are a tenant under leases for certain properties, including ground leases. These leases have expirations from 2033 to 2119, or 2043 to 2119 as fully extended. Certain leases offer extension options which we assess against relevant economic factors to determine whether we are reasonably certain of exercising or not exercising the option. Lease payments associated with renewal periods that we are reasonably certain will be exercised, if any, are included in the measurement of the corresponding lease liability and right of use asset. Certain of our leases are subject to rent resets, generally based on a percentage of the then fair market value, a fixed amount, or a percentage of the preceding rent at specified future dates. Rent resets will be recognized in the periods in which they are incurred. Additionally, certain of our leases are subject to percentage rent arrangements based on thresholds established in the lease agreement, such as percentage of sales at the property. Percentage rents will be recognized in the periods in which they are incurred. The table below summarizes our current lease arrangements as of December 31, 2022: Property (1) Year of Current Expiration Year of Final Expiration (2) 711 Third Avenue (3) 2033 2083 1185 Avenue of the Americas 2043 2043 SL Green Headquarters at One Vanderbilt (4) 2043 2048 625 Madison Avenue 2043 2054 420 Lexington Avenue 2050 2080 Summit One Vanderbilt 2058 2070 15 Beekman (5)(6) 2119 2119 (1) All leases are classified as operating leases unless otherwise specified. (2) Reflects exercise of all available extension options. (3) The Company owns 50% of the fee interest. (4) In March 2021, the Company commenced its lease for its corporate headquarters at One Vanderbilt. See note 10, "Related Party Transactions." (5) The Company has an option to purchase the ground lease for a fixed price on a specific date. The lease is classified as a financing lease. (6) In August 2020, the Company entered into a long-term sublease with an unconsolidated joint venture as part of the capitalization of the 15 Beekman development project. See Note 6, "Investments in Unconsolidated Joint Ventures." The following is a schedule of future minimum lease payments as evaluated in accordance with ASC 842 for our financing leases and operating leases with initial terms in excess of one year as of December 31, 2022 (in thousands): Financing leases Operating leases 2023 $ 3,133 $ 52,220 2024 3,180 58,068 2025 3,228 58,207 2026 3,276 58,347 2027 3,325 58,358 Thereafter 200,169 1,334,570 Total minimum lease payments $ 216,311 $ 1,619,770 Amount representing interest (112,093) — Amount discounted using incremental borrowing rate — (724,670) Total lease liabilities excluding liabilities related to assets held for sale $ 104,218 $ 895,100 Total lease liabilities $ 104,218 $ 895,100 The following table provides lease cost information for the Company's operating leases for the twelve months ended December 31, 2022 and 2021 (in thousands): Twelve Months Ended December 31, Operating Lease Costs 2022 2021 Operating lease costs before capitalized operating lease costs $ 33,773 $ 30,270 Operating lease costs capitalized (6,830) (3,716) Operating lease costs, net (1) $ 26,943 $ 26,554 (1) This amount is included in Operating lease rent in our consolidated statements of operations. The following table provides lease cost information for the Company's financing leases for the twelve months ended December 31, 2022 and 2021 (in thousands): Twelve Months Ended December 31, Financing Lease Costs 2022 2021 Interest on financing leases before capitalized interest $ 4,555 $ 5,448 Interest on financing leases capitalized — — Interest on financing leases, net (1) 4,555 5,448 Amortization of right-of-use assets (2) 22,112 660 Financing lease costs, net $ 26,667 $ 6,108 (1) These amounts are included in Interest expense, net of interest income in our consolidated statements of operations. (2) These amounts are included in Depreciation and amortization in our consolidated statements of operations. As of December 31, 2022, the weighted-average discount rate used to calculate the lease liabilities was 4.51%. As of December 31, 2022, the weighted-average remaining lease term was 28 years, inclusive of purchase options expected to be exercised.

Segment Information

Segment Information	12 Months Ended
	Dec. 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, at certain properties, ground rent expense. 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 years ended December 31, 2022, 2021, and 2020, and selected asset information as of December 31, 2022 and 2021, regarding our operating segments are as follows (in thousands): Real Estate Segment Debt and Preferred Equity Segment Total Company Total revenues Years ended: December 31, 2022 $ 745,626 $ 81,113 $ 826,739 December 31, 2021 763,651 80,340 843,991 December 31, 2020 932,581 120,163 1,052,744 Net (loss) income Years ended: December 31, 2022 $ (132,283) $ 55,980 $ (76,303) December 31, 2021 412,393 68,239 480,632 December 31, 2020 354,353 60,405 414,758 Total assets As of: December 31, 2022 $ 11,727,418 $ 628,376 $ 12,355,794 December 31, 2021 9,974,140 1,092,489 11,066,629 Interest costs for the debt and preferred equity segment include any actual costs incurred for borrowings on the 2017 MRA and the FHLB Facility. Interest is imputed on the investments that do not collateralize the 2017 MRA and the FHLB Facility 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 that segment does not have dedicated personnel and the use of personnel and resources is dependent on transaction volume between the two segments, which varies between periods. In addition, we base performance on the individual segments prior to allocating marketing, general and administrative expenses. For the years ended, December 31, 2022, 2021, and 2020 marketing, general and administrative expenses totaled $93.8 million, $94.9 million, and $91.8 million respectively. All other expenses, except interest, relate entirely to the real estate assets. There were no transactions between the above two segments.

Schedule III - Real Estate and

Schedule III - Real Estate and Accumulated Depreciation	12 Months Ended
	Dec. 31, 2022
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation Disclosure [Abstract]
Schedule III - Real Estate and Accumulated Depreciation	Column A Column B Column C Column D Cost Capitalized Subsequent To Acquisition (1) Column E Gross Amount at Which Column F Column G Column H Column I Description (2) Encumbrances Land Building & Land Building & Land Building & Total Accumulated Depreciation Date of Date Life on 420 Lexington Ave $ 283,064 $ — $ 333,499 $ — $ 225,456 $ — $ 558,955 $ 558,955 $ 205,225 1927 3/1998 Various 711 Third Avenue — 19,844 115,769 — 71,773 19,844 187,542 207,386 81,265 1955 5/1998 Various 555 W. 57th Street — 18,846 140,946 — 4,499 18,846 145,445 164,291 91,729 1971 1/1999 Various 461 Fifth Avenue — — 88,276 28,873 9,068 28,873 97,344 126,217 41,304 1988 10/2003 Various 750 Third Avenue — 51,093 251,523 — 52,043 51,093 303,566 354,659 110,402 1958 7/2004 Various 625 Madison Avenue — — 291,319 — 146,707 — 438,026 438,026 150,321 1956 10/2004 Various 485 Lexington Avenue 450,000 78,282 452,631 — (20,977) 78,282 431,654 509,936 189,131 1956 12/2004 Various 810 Seventh Avenue — 114,077 550,819 — 5,483 114,077 556,302 670,379 232,822 1970 1/2007 Various 1185 Avenue of the Americas — — 791,106 — 131,034 — 922,140 922,140 375,907 1969 1/2007 Various 1350 Avenue of the Americas — 90,941 431,517 — 8,487 90,941 440,004 530,945 182,958 1966 1/2007 Various 1-6 Landmark Square (4) 100,000 27,852 161,343 (6,939) (27,266) 20,913 134,077 154,990 41,964 1973-1984 1/2007 Various 7 Landmark Square (4) — 1,721 8,417 (1,337) (6,240) 384 2,177 2,561 606 2007 1/2007 Various 100 Church Street 370,000 34,994 183,932 — 10,100 34,994 194,032 229,026 71,515 1959 1/2010 Various 125 Park Avenue — 120,900 270,598 — 19,946 120,900 290,544 411,444 120,545 1923 10/2010 Various 19 East 65th Street — 8,603 2,074 — 1,888 8,603 3,962 12,565 4 1929 01/2012 Various 304 Park Avenue — 54,489 90,643 — 7,425 54,489 98,068 152,557 29,685 1930 6/2012 Various 760 Madison Avenue (5) — 284,286 8,314 (2,450) 107,078 281,836 115,392 397,228 4,991 1996/2012 7/2014 Various 719 Seventh Avenue (6) 50,000 41,180 46,232 — (4,724) 41,180 41,508 82,688 4,388 1927 7/2014 Various 110 Greene Street — 45,120 228,393 — 4,166 45,120 232,559 277,679 49,982 1910 7/2015 Various 7 Dey / 185 Broadway (7) 210,148 45,540 27,865 — 204,968 45,540 232,833 278,373 2,658 1921 8/2015 Various 885 Third Avenue (8) — 138,444 244,040 (138,444) (136,174) — 107,866 107,866 6,664 1986 07/2020 Various 690 Madison 60,000 13,820 51,732 — 28 13,820 51,760 65,580 2,044 1879 09/2021 Various 245 Park Avenue 1,712,750 505,458 1,394,584 — 14,597 505,458 1,409,181 1,914,639 20,877 1966 09/2022 Various Other (9) — 1,734 16,224 — 610,711 1,734 626,935 628,669 22,567 Total $ 3,235,962 $ 1,697,226 $ 6,181,796 $ (120,297) $ 1,440,076 $ 1,576,927 $ 7,621,872 $ 9,198,799 $ 2,039,554 (1) Includes depreciable real estate reserves and impairments recorded subsequent to acquisition. (2) All properties located in New York, New York unless otherwise noted. (3) Includes right of use lease assets. (4) Property located in Connecticut. (5) Includes amounts attributable to the property at 762 Madison Avenue, which is part of this development project. (6) We own a 75.0% interest in this property. (7) Properties at 5-7 Dey Street, 183 Broadway, and 185 Broadway were demolished in preparation of the development site for the 7 Dey / 185 Broadway project. (8) In December 2022, the Company sold 414,317 square feet of office leasehold condominium units at the property. The Company retained the remaining 218,796 square feet of the building. (9) Other includes tenant improvements of eEmerge, capitalized interest and corporate improvements. The changes in real estate for the years ended December 31, 2022, 2021 and 2020 are as follows (in thousands): 2022 2021 2020 Balance at beginning of year $ 7,650,907 $ 7,355,079 $ 8,784,567 Property acquisitions 1,900,042 124,103 178,635 Improvements 335,413 296,876 481,327 Retirements/disposals/deconsolidation (687,563) (125,151) (2,089,450) Balance at end of year $ 9,198,799 $ 7,650,907 $ 7,355,079 The aggregate cost of land, buildings and improvements, before depreciation, for Federal income tax purposes as of December 31, 2022 was $6.4 billion (unaudited). The changes in accumulated depreciation, exclusive of amounts relating to equipment, autos, and furniture and fixtures, for the years ended December 31, 2022, 2021 and 2020 are as follows (in thousands): 2022 2021 2020 Balance at beginning of year $ 1,896,199 $ 1,956,077 $ 2,060,560 Depreciation for year 175,465 174,219 270,843 Retirements/disposals/deconsolidation (32,110) (234,097) (375,326) Balance at end of year $ 2,039,554 $ 1,896,199 $ 1,956,077

Significant Accounting Polici_2

Significant Accounting Policies (Policies)	12 Months Ended
	Dec. 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. A noncontrolling interest in a consolidated subsidiary is defined as the portion of the equity (net assets) in a subsidiary not attributable, directly or indirectly, to us. Noncontrolling interests are required to be presented as a separate component of equity in the consolidated balance sheet and the presentation of net income is modified to present earnings and other comprehensive income attributed to controlling and noncontrolling interests. We assess the accounting treatment for each joint venture and debt and preferred equity investment. This assessment includes a review of each joint venture or limited liability company agreement to determine the rights provided to each party and whether those rights are protective or participating. For all VIEs, we review such agreements in order to determine which party has the power to direct the activities that most significantly impact the entity's economic performance. In situations where we and our partner approve, among other things, the annual budget, receive a detailed monthly reporting package, meet on a quarterly basis to review the results of the joint venture, review and approve the joint venture's tax return before filing, and approve all leases that cover more than a nominal amount of space relative to the total rentable space at each property, we do not consolidate the joint venture as we consider these to be substantive participation rights that result in shared power of the activities that most significantly impact the performance of the joint venture. Our joint venture agreements typically contain certain protective rights such as requiring partner approval to sell, finance or refinance the property and the payment of capital expenditures and operating expenditures outside of the approved budget or operating plan.
Investment in Commercial Real Estate Properties	Investment in Commercial Real Estate Properties Real estate properties are presented at cost less accumulated depreciation and amortization. Costs directly related to the development or redevelopment of properties are capitalized. Ordinary repairs and maintenance are expensed as incurred; major replacements and betterments, which improve or extend the life of the asset, are capitalized and depreciated over their estimated useful lives. We recognize the assets acquired, liabilities assumed (including contingencies) and any noncontrolling interests in an acquired entity at their respective fair values on the acquisition date. When we acquire our partner's equity interest in an existing unconsolidated joint venture and gain control over the investment, we record the consolidated investment at fair value. The difference between the book value of our equity investment on the purchase date and our share of the fair value of the investment's purchase price is recorded as a purchase price fair value adjustment in our consolidated statements of operations. See Note 3, "Property Acquisitions." 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. As of December 31, 2022, the weighted average amortization period for above-market leases, below-market leases, and in-place lease costs is 6.3 years, 7.4 years, and 8.1 years, respectively. 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. We incur a variety of costs in the development and leasing of our properties. After the determination is made to capitalize a cost, it is allocated to the specific component of a project that is benefited. Determination of when a development project is substantially complete and capitalization must cease involves a degree of judgment. The costs of land and building under development include specifically identifiable costs. The capitalized costs include, but are not limited to, pre-construction costs essential to the development of the property, development costs, construction costs, interest costs, real estate taxes, salaries and related costs and other costs incurred during the period of development. We consider a construction project as substantially completed and held available for occupancy upon the completion of tenant improvements, but no later than one year after major construction activity ceases. We cease capitalization on the portions substantially completed and occupied or held available for occupancy, and capitalize only those costs associated with the portions under construction.
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.
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. In September 2022, the Company recorded at fair value the assets acquired and liabilities assumed at 245 Park Avenue. This fair value was determined using a third-party valuation which primarily utilized 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. In September 2021, the Company was the successful bidder at the foreclosure of 690 Madison Avenue, at which time the company, at which time the Company's outstanding principal and accrued interest balance were credited to our equity investment in the property as it previously served as collateral for a debt and preferred equity investment. We recorded the assets acquired and liabilities assumed at fair value. This fair value was determined using a third-party valuation which primarily utilized 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. In July 2021, the Company sold a 49% interest in its 220 East 42nd Street investment, which resulted in the Company no longer retaining a controlling interest in the entity, as defined in ASC 810, and the deconsolidation of the 51.0% interest we retained. We recorded our investment at fair value which resulted in the recognition of a fair value adjustment of $206.8 million during the year ended December 31, 2021. The fair value of our investment was determined by the terms of the joint venture agreement. In January 2021, pursuant to the partnership documents of our 885 Third Ave investments, certain participating rights of the common member expired. As a result, it was determined that this investment is a VIE in which we are the primary beneficiary, and the investment was consolidated in our financial statements. Upon consolidating the entity, the assets and liabilities of the entity were recorded at fair value. This fair value was determined using a third-party valuation which primarily utilized 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.
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 December 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 (loss) 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 Ventures We account for our investments in unconsolidated joint ventures under the equity method of accounting in cases where we exercise significant influence over, but do not control, these entities and are not considered to be the primary beneficiary. We consolidate those joint ventures that we control or which are variable interest entities (each, a "VIE") and where we are considered to be the primary beneficiary. In all these joint ventures, the rights of the joint venture partner are both protective as well as participating. Unless we are determined to be the primary beneficiary in a VIE, these participating rights preclude us from consolidating these VIE entities. These investments are recorded initially at cost, as investments in unconsolidated joint ventures, and subsequently adjusted for equity in net income (loss) and cash contributions and distributions. Equity in net income (loss) from unconsolidated joint ventures is allocated based on our ownership or economic interest in each joint venture and includes adjustments related to basis differences in accounting for the investment. When a capital event (as defined in each joint venture agreement) such as a refinancing occurs, if return thresholds are met, future equity income will be allocated at our increased economic interest. We recognize incentive income from unconsolidated real estate joint ventures as income to the extent it is earned and not subject to a clawback feature. Distributions we receive from unconsolidated real estate joint ventures in excess of our basis in the investment are recorded as offsets to our investment balance if we remain liable for future obligations of the joint venture or may otherwise be committed to provide future additional financial support. 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. 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 December 31, 2022. We may originate loans for real estate acquisition, development and construction ("ADC loans"), where we expect to receive some of the residual profit from such projects. When the risk and rewards of these arrangements are essentially the same as an investor or joint venture partner, we account for these arrangements as real estate investments under the equity method of accounting for investments. Otherwise, we account for these arrangements consistent with the accounting for our debt and preferred equity investments.
Deferred Lease Costs	Deferred Lease CostsDeferred 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. Certain of our employees provide leasing services to the wholly-owned properties.
Deferred Financing Costs	Deferred Financing Costs Deferred financing costs represent commitment fees, legal, title and other third party costs associated with obtaining commitments for financing which result in a closing of such financing. These costs are amortized over the terms of the respective agreements. Unamortized deferred financing costs are expensed when the associated debt is refinanced or repaid before maturity. Costs incurred in seeking financing transactions, which do not close, are expensed in the period in which it is determined that the financing will not close. Deferred financing costs related to a recognized debt liability are presented in the consolidated balance sheet as a direct deduction from the carrying amount of that debt liability.
Lease Classification	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.
Rent Expense	Rent Expense Rent expense is recognized on a straight-line basis over the initial term of the lease. The excess of the rent expense recognized over the amounts contractually due pursuant to the underlying lease is included in the lease liability - operating leases on the consolidated balance sheets.
Underwriting Commissions and Costs	Underwriting Commissions and Costs Underwriting commissions and costs incurred in connection with our stock offerings are reflected as a reduction of additional paid-in-capital.
Transaction cost	Transaction Costs Transaction costs for asset acquisitions are capitalized to the investment basis, which is then subject to a purchase price allocation based on relative fair value. Transaction costs for business combinations or costs incurred on potential transactions that are not consummated are expensed as incurred.
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. During the years ended December 31, 2022, 2021 and 2020, we recorded Federal, state and local tax provisions of $3.7 million, $2.8 million, and $1.2 million, respectively. For the year ended December 31, 2022, the Company paid distributions on its common stock of $6.17 per share which represented $2.56 per share of ordinary income and $1.17 per share of capital gains. For the year ended December 31, 2021, the Company paid distributions on its common stock of $8.09 per share which represented $0.50 per share of ordinary income, and $5.92 per share of capital gains. For the year ended December 31, 2020, the Company paid distributions on its common stock of $5.54 per share which represented $1.84 per share of ordinary income and $3.06 per share of capital gains. 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.
Stock Based Employee Compensation Plans	Stock Based Employee Compensation Plans We have a stock-based employee compensation plan, described more fully in Note 14, "Share-based Compensation." For share-based awards with a performance or market measure, we recognize compensation cost over the requisite service period, using the accelerated attribution expense method. The requisite service period begins on the date the compensation committee of our Board of Directors authorizes the award, adopts any relevant performance measures and communicates the award to the employees. For programs with awards that vest based on the achievement of a performance condition or market condition, we determine whether it is probable that the performance condition will be met, and estimate compensation cost based on the fair value of the award at the applicable award date estimated using a binomial model or market quotes. For share-based awards for which there is no pre-established performance measure, we recognize compensation cost over the service vesting period, which represents the requisite service period, on a straight-line basis. In accordance with the provisions of our share-based incentive compensation plans, we accept the return of shares of the Company's common stock, at the current quoted market price, from certain key employees to satisfy minimum statutory tax-withholding requirements related to shares that vested during the period. Awards can also be made in the form of a separate series of units of limited partnership interest in the Operating Partnership called long-term incentive plan units, or LTIP units. LTIP units, which can be granted either as free-standing awards or in tandem with other awards under our stock incentive plan, are valued by reference to the value of the Company's common stock at the time of grant and are subject to such conditions and restrictions as the compensation committee of the Company's board of directors may determine, including continued employment or service, computation of financial metrics and/or achievement of pre-established performance goals and objectives. The Company's stock options are recorded at fair value at the time of issuance. Fair value of the stock options is determined using the Black-Scholes option pricing model. The Black-Scholes model was developed for use in estimating the fair value of traded options, which have no vesting restrictions and are fully transferable. In addition, option valuation models require the input of highly subjective assumptions including the expected stock price volatility. Because our plan has characteristics significantly different from those of traded options and because changes in the subjective input assumptions can materially affect the fair value estimate, in our opinion, the existing models do not necessarily provide a reliable single measure of the fair value of the employee stock options. Compensation cost for stock options, if any, is recognized over the vesting period of the award. Our policy is to grant options with an exercise price equal to the quoted closing market price of the Company's common stock on either the grant date or the date immediately preceding the grant date. Awards of stock or restricted stock are expensed as compensation over the benefit period based on the fair value of the stock on the grant date.
Derivative Instruments	Derivative Instruments In the normal course of business, we use a variety of commonly used derivative instruments, such as interest rate swaps, caps, collars and floors, to manage, or hedge, interest rate risk. Effectiveness is essential for those derivatives that we intend to qualify for hedge accounting. Some derivative instruments are associated with an anticipated transaction. In those cases, hedge effectiveness criteria also require that it be probable that the underlying transaction occurs. Instruments that meet these hedging criteria are formally designated as hedges at the inception of the derivative contract. To determine the fair values of derivative instruments, we use a variety of methods and assumptions that are based on market conditions and risks existing at each balance sheet date. For the majority of financial instruments including most derivatives, long-term investments and long-term debt, standard market conventions and techniques such as discounted cash flow analysis, option pricing models, replacement cost, and termination cost are used to determine fair value. All methods of assessing fair value result in a general approximation of value, and such value may never actually be realized. In the normal course of business, we are exposed to the effect of interest rate changes and limit these risks by following established risk management policies and procedures including the use of derivatives. To address exposure to interest rates, derivatives are used primarily to fix the rate on debt based on floating-rate indices and manage the cost of borrowing obligations. We use a variety of conventional derivative products. These derivatives typically include interest rate swaps, caps, collars and floors. We expressly prohibit the use of unconventional derivative instruments and using derivative instruments for trading or speculative purposes. Further, we have a policy of only entering into contracts with major financial institutions based upon their credit ratings and other factors. We may employ swaps, forwards or purchased options to hedge qualifying forecasted transactions. Gains and losses related to these transactions are deferred and recognized in net income as interest expense in the same period or periods that the underlying transaction occurs, expires or is otherwise terminated. Hedges that are reported at fair value and presented on the balance sheet could be characterized as cash flow hedges or fair value hedges. Interest rate caps and collars are examples of cash flow hedges. Cash flow hedges address the risk associated with future cash flows of interest payments. For all hedges held by us that meet the hedging objectives established by our corporate policy governing interest rate risk management, no net gains or losses were reported in earnings. The changes in fair value of derivative instruments designated as hedge instruments are reflected in accumulated other comprehensive income (loss). For derivative instruments not designated as hedging instruments, the gain or loss, resulting from the change in the estimated fair value of the derivative instruments, is recognized in current earnings during the period of change.
Earnings per Share of the Company	Earnings per Share of the Company The Company presents both basic and diluted earnings per share ("EPS") using the two-class method, 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. Basic EPS includes participating securities, consisting of unvested restricted stock that receive nonforfeitable dividends similar to shares of common stock. Diluted EPS reflects the potential dilution that could occur if securities or other contracts to issue common stock were exercised or converted into common stock, where such exercise or conversion would result in a lower EPS amount. Diluted EPS also includes units of limited partnership interest. The dilutive effect of stock options is reflected in the weighted average diluted outstanding shares calculation by application of the treasury stock method.
Earnings per Unit of the Operating Partnership	Earnings per Unit of the Operating Partnership The Operating Partnership presents both basic and diluted earnings per unit ("EPU") using the two-class method, which is an earnings allocation formula that determines EPU for common units and any participating securities according to dividends declared (whether paid or unpaid). Under the two-class method, basic EPU is computed by dividing the income available to common unitholders by the weighted-average number of common units outstanding for the period. Basic EPU includes participating securities, consisting of unvested restricted units that receive nonforfeitable dividends similar to shares of common units. Diluted EPU reflects the potential dilution that could occur if securities or other contracts to issue common units were exercised or converted into common units, where such exercise or conversion would result in a lower EPU amount. The dilutive effect of unit options is reflected in the weighted average diluted outstanding units calculation by application of the treasury stock method.
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. In March 2020, the FASB issued ASU No. 2020-04 Reference Rate Reform (Topic 848) Facilitation of the Effects of Reference Rate Reform on Financial Reporting and then in January 2021, the FASB issued ASU No. 2021-01. The amendments provide practical expedients for reference rate reform related activities that impact debt, leases, derivatives and other contracts. The guidance is optional and is effective between March 12, 2020 and December 31, 2024, which was extended from the original sunset date of December 31, 2022 when the FASB issued ASU No. 2022-06 in December 2022. The guidance may be elected over time as reference rate reform activities occur. During the first quarter of 2020, the Company elected to apply the hedge accounting expedients related to probability and the assessments of effectiveness for future LIBOR-indexed cash flows to assume that the index upon which future hedged transactions will be based matches the index on the corresponding derivatives. Application of these expedients preserves the presentation of derivatives consistent with past presentation. The impact of this guidance did not have a material impact on the Company's consolidated financial statements.

Organization and Basis of Pre_2

Organization and Basis of Presentation (Tables)	12 Months Ended
	Dec. 31, 2022
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Schedule of commercial office properties	On December 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 13 9,963,138 12 13,998,381 25 23,961,519 90.7 % Retail 2 17,888 9 301,996 11 319,884 91.2 % Development/Redevelopment (1) 5 1,685,215 3 2,746,241 8 4,431,456 N/A 20 11,666,241 24 17,046,618 44 28,712,859 90.7 % Suburban Office 7 862,800 — — 7 862,800 79.3 % Total commercial properties 27 12,529,041 24 17,046,618 51 29,575,659 90.3 % Residential: Manhattan Residential (2) 1 140,382 — — 1 140,382 89.5 % Total portfolio 28 12,669,423 24 17,046,618 52 29,716,041 90.3 % (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 December 31, 2022, we owned a building at 7 Dey Street / 185 Broadway that was comprised of approximately 140,382 square feet (unaudited) of residential space and approximately 50,206 square feet (unaudited) of office and retail space that is under development. For the purpose of this report, we have included this building in the number of residential properties we own. However, we have included only the residential square footage in the residential approximate square footage, and have listed the balance of the square footage as development square footage.

Significant Accounting Polici_3

Significant Accounting Policies (Tables)	12 Months Ended
	Dec. 31, 2022
Accounting Policies [Abstract]
Schedule of estimated useful lives	Properties other than Right of use assets - operating leases are depreciated using the straight-line method over the estimated useful lives of the assets. The estimated useful lives are as follows: Category Term Building (fee ownership) 40 years Building improvements shorter of remaining life of the building or useful life Building (leasehold interest) lesser of 40 years or remaining term of the lease Right of use assets - financing leases lesser of 40 years or remaining lease term Furniture and fixtures 4 to 7 years Tenant improvements shorter of remaining term of the lease or useful life
Summary of identified intangible assets (acquired above-market leases and in-place leases) and intangible liabilities (acquired below-market leases)	The following summarizes our identified intangible assets (acquired above-market leases and in-place leases) and intangible liabilities (acquired below-market leases) as of December 31, 2022 and 2021 (in thousands): December 31, 2022 2021 Identified intangible assets (included in other assets): Gross amount $ 403,552 $ 199,722 Accumulated amortization (190,066) (182,643) Net (1) $ 213,486 $ 17,079 Identified intangible liabilities (included in deferred revenue): Gross amount $ 361,338 $ 212,767 Accumulated amortization (212,191) (210,262) Net (1) $ 149,147 $ 2,505
Schedule of estimated annual amortization of acquired above-market leases, net of acquired below-market leases	The estimated annual amortization of acquired above-market leases, net of acquired (below-market) leases (a component of rental revenue), for each of the five succeeding years is as follows (in thousands): 2023 $ (23,580) 2024 (14,878) 2025 (14,760) 2026 (11,775) 2027 (11,029)
Schedule of estimated annual amortization of all other identifiable assets	The estimated annual amortization of all other identifiable assets (a component of depreciation and amortization expense) including tenant improvements for each of the five succeeding years is as follows (in thousands): 2023 $ 65,130 2024 38,982 2025 37,298 2026 31,381 2027 25,058
Schedule of marketable securities	As of December 31, 2022 and 2021, we held the following marketable securities (in thousands): December 31, 2022 2021 Commercial mortgage-backed securities $ 11,240 $ 24,146 Total marketable securities available-for-sale $ 11,240 $ 24,146 Equity marketable securities $ — $ 10,606 Total investment in marketable securities $ 11,240 $ 34,752
Schedules of concentration of risk, by risk factor	For the years ended December 31, 2022, 2021, and 2020, 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 2022 Property 2021 Property 2020 One Vanderbilt Avenue 14.1% 11 Madison Avenue 10.8% 11 Madison Avenue 8.2% 245 Park Avenue 10.0% 420 Lexington Avenue 8.3% 420 Lexington Avenue 7.5% 11 Madison Avenue 7.8% 1515 Broadway 8.1% 1185 Avenue of the Americas 6.9% 420 Lexington Avenue 6.3% 1185 Avenue of the Americas 8.0% 1515 Broadway 6.6% 1515 Broadway 5.8% 280 Park Avenue 6.7% 220 East 42nd Street 5.9% 1185 Avenue of the Americas 5.1% 919 Third Avenue 5.3% 280 Park Ave 5.4% 280 Park Avenue 5.1% 485 Lexington Avenue 5.3% 555 West 57th Street 5.2%

Property Acquisitions (Tables)

Property Acquisitions (Tables)	12 Months Ended
	Dec. 31, 2022
Business Combination and Asset Acquisition [Abstract]
Schedule of business acquisitions, by acquisition	2022 Acquisitions The following table summarizes the properties acquired during the year ended December 31, 2022: Property Acquisition Date Property Type Approximate Square Feet Gross Asset Valuation 245 Park Avenue (1) September 2022 Fee Interest 1,782,793 $ 1,960.0 (1) 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. On July 8, 2022, certain of the debtors and affiliates of SL Green entered into a Plan Sponsorship and Investment Agreement (the "Plan"), pursuant to which SL Green became the stalking horse bidder for the property. Since the debtors did not receive any qualifying bids for the property and the Plan was confirmed, SL Green acquired full ownership and control of the property in September 2022, at which time our outstanding preferred equity and accrued interest balance were credited to our equity investment in the property. We recorded the assets acquired and liabilities assumed at fair value. See Note 5, "Debt and Preferred Equity Investments" and Note 16, "Fair Value Measurements." 2021 Acquisitions The following table summarizes the properties acquired during the year ended December 31, 2021: Property Acquisition Date Property Type Approximate Square Feet Gross Asset Valuation 885 Third Avenue (1) January 2021 Fee Interest 625,000 $ 387.9 461 Fifth Avenue (2) June 2021 Fee Interest 200,000 28.0 1591-1597 Broadway September 2021 Fee Interest 7,684 121.0 690 Madison Avenue (3) September 2021 Fee Interest 7,848 72.2 (1) In January 2021, pursuant to the partnership documents of our 885 Third Avenue investment, certain participating rights of the common member expired. As a result, it was determined that this investment is a VIE in which we are the primary beneficiary, and the investment was consolidated in our financial statements. Upon consolidating the entity, the assets and liabilities of the entity were recorded at fair value. Prior to January 2021, the investment was accounted for under the equity method. See Note 6, "Investments in Unconsolidated Joint Ventures" and Note 16, "Fair Value Measurements. (2) In April 2021, the Company exercised its option to acquire the fee interest in the property from the ground lessor and the Company acquired the fee interest in June 2021. The Company held the leasehold interest in the property prior to exercising its option. (3) In September 2021, the Company was the successful bidder for the fee interest in 690 Madison Avenue at the foreclosure of the asset. The property previously served as collateral for a debt and preferred equity investment. We recorded the assets acquired and liabilities assumed at fair value. See Note 5, "Debt and Preferred Equity Investments" and Note 16, "Fair Value Measurements." 2020 Acquisitions The following table summarizes the properties acquired during the year ended December 31, 2020: Property Acquisition Date Property Type Approximate Square Feet Gross Asset Valuation 762 Madison Avenue (1) January 2020 Fee Interest 6,109 $ 29.3 707 Eleventh Avenue January 2020 Fee Interest 159,720 90.0 15 Beekman (2) January 2020 Leasehold Interest 98,412 — 590 Fifth Avenue (3) October 2020 Fee Interest 103,300 107.2 (1) The Company acquired from our joint venture partner the remaining 10% interest in this property that the Company did not already own. (2) In January 2020, the Company entered into a 99-year ground lease of 126 Nassau Street and subsequently renamed the property 15 Beekman. In August 2020, we entered into a partnership as part of the capitalization of this development project. See note 6, “Investment in Unconsolidated Joint Ventures.” (3) The property previously served as collateral for a debt and preferred equity investment and was acquired through a negotiated transaction with the sponsor.

Properties Held for Sale and _2

Properties Held for Sale and Property Dispositions (Tables)	12 Months Ended
	Dec. 31, 2022
Discontinued Operations and Disposal Groups [Abstract]
Summary of properties sold and income from discontinued operations	The following table summarizes the properties sold during the years ended December 31, 2022, 2021, and 2020: Property Disposition Date Property Type Unaudited Approximate Usable Square Feet Sales Price (1) (in millions) (Loss) Gain on Sale (2) (in millions) 885 Third Avenue - Office Condominium Units (3) December 2022 Fee / Leasehold Interest 414,317 $ 300.4 $ (24.0) 609 Fifth Avenue June 2022 Fee Interest 138,563 100.5 (80.2) 1591-1597 Broadway May 2022 Fee Interest 7,684 121.0 (4.5) 1080 Amsterdam Avenue April 2022 Leasehold Interest 85,250 42.7 17.9 707 Eleventh Avenue February 2022 Fee Interest 159,720 95.0 (0.8) 110 East 42nd Street December 2021 Fee Interest 215,400 117.1 3.6 590 Fifth Avenue October 2021 Fee Interest 103,300 103.0 (3.2) 220 East 42nd Street (4) July 2021 Fee Interest 1,135,000 783.5 175.1 635-641 Sixth Avenue June 2021 Fee Interest 267,000 325.0 99.4 106 Spring Street (5) March 2021 Fee Interest 5,928 35.0 (2.8) 133 Greene Street (5) February 2021 Fee Interest 6,425 15.8 0.2 712 Madison Avenue (6) January 2021 Fee Interest 6,600 43.0 (1.4) 30 East 40th Street December 2020 Leasehold Interest 69,446 5.2 (1.6) 1055 Washington Boulevard December 2020 Leasehold Interest 182,000 23.8 (11.5) Williamsburg Terrace December 2020 Fee Interest 52,000 32.0 11.8 410 Tenth Avenue December 2020 Fee Interest 638,000 952.5 56.4 400 East 58th Street September 2020 Fee Interest 140,000 62.0 8.3 609 Fifth Avenue - Retail Condominium May 2020 Fee Interest 21,437 168.0 63.3 315 West 33rd Street - The Olivia March 2020 Fee Interest 492,987 446.5 71.8 (1) Sales price represents the gross sales price for a property or the gross asset valuation for interests in a property. (2) The (losses) gains on sale are net of $11.2 million, $13.7 million, and $10.5 million of employee compensation accrued in connection with the realization of the investment dispositions during the years ended December 31, 2022, 2021, and 2020, respectively. Additionally, amounts do not include adjustments for expenses recorded in subsequent periods. (3) In December 2022, the Company sold 414,317 square feet of office leasehold condominium units at the property. The Company retained the remaining 218,796 square feet of the building. (4) In July 2021, the Company sold a 49% interest, which resulted in the Company no longer retaining a controlling interest in the entity, as defined in ASC 810, and the deconsolidation of the 51.0% interest we retained. We recorded our investment at fair value which resulted in the recognition of a fair value adjustment of $206.8 million, which is reflected in the Company's consolidated statements of operations within Purchase price and other fair value adjustments. See Note 6, "Investments in Unconsolidated Joint Ventures." (5) In March 2021, the property was foreclosed by the lender. (6) Disposition resulted from the ground lessee exercising its purchase option under a ground lease arrangement.

Debt and Preferred Equity Inv_2

Debt and Preferred Equity Investments (Tables)	12 Months Ended
	Dec. 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 years ended December 31, 2022 and 2021 (in thousands): December 31, 2022 December 31, 2021 Balance at beginning of year (1) $ 1,088,723 $ 1,076,542 Debt investment originations/fundings/accretion (2) 62,992 193,824 Preferred equity investment originations/accretion (2) 37,505 13,220 Redemptions/sales/syndications/equity ownership/amortization (565,940) (201,446) Net change in loan loss reserves — 6,583 Balance at end of period (1) $ 623,280 $ 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.
Schedule of debt	Below is a summary of our debt and preferred equity investments as of December 31, 2022 (dollars in thousands): Floating Rate Fixed Rate Total Carrying Value Senior Financing Maturity (1) Type Carrying Value Face Value Interest Rate Carrying Value Face Value Interest Rate Mezzanine Debt $ 144,056 $ 144,402 L + 4.95 - 12.38% $ 359,366 $ 367,461 7.00 - 14.30% $ 503,422 $ 1,691,780 2023 - 2029 Preferred Equity — — — 119,858 119,858 6.50% 119,858 250,000 2027 Balance at end of period $ 144,056 $ 144,402 $ 479,224 $ 487,319 $ 623,280 $ 1,941,780 (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 years ended December 31, 2022, 2021 and 2020 (in thousands): December 31, 2022 2021 2020 Balance at beginning of year $ 6,630 $ 13,213 $ 1,750 Cumulative adjustment upon adoption of ASC 326 — — 27,803 Current period provision for loan loss — — 20,693 Write-offs charged against the allowance — (6,583) (37,033) Balance at end of period (1) $ 6,630 $ 6,630 $ 13,213 (1) As of December 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.
Summary of debt investments	As of December 31, 2022 and 2021, we held the following debt investments with an aggregate weighted average current yield of 6.46%, as of December 31, 2022 (dollars in thousands): Loan Type December 31, 2022 December 31, 2022 December 31, 2022 Carrying Value (1) December 31, 2021 Carrying Value (1) Maturity Date (2) Fixed Rate Investments: Mezzanine Loan (3) $ — $ 401,269 $ 225,367 $ 225,367 June 2023 Mezzanine Loan — 283,293 77,109 66,873 June 2023 Mezzanine Loan (4)(5) — 105,000 13,366 13,366 June 2024 Mezzanine Loan — 95,000 30,000 30,000 January 2025 Mezzanine Loan — 85,000 20,000 20,000 December 2029 Mezzanine Loan — — — 43,521 Mortgage Loan — — — 73,000 Mezzanine Loan (6) — — — 55,250 Total fixed rate $ — $ 969,562 $ 365,842 $ 527,377 Floating Rate Investments: Mezzanine Loan $ — $ 275,000 $ 50,000 $ 49,998 April 2023 Mezzanine Loan 3,761 54,000 8,243 8,050 May 2023 Mezzanine Loan 17,924 207,134 46,884 30,802 May 2023 Mezzanine Loan — 186,084 39,083 37,511 July 2023 Mezzanine Loan (7) — — — 133,735 Mortgage and Mezzanine Loan — — — 34,874 Total floating rate $ 21,685 $ 722,218 $ 144,210 $ 294,970 Allowance for loan loss $ — $ — $ (6,630) $ (6,630) Total $ 21,685 $ 1,691,780 $ 503,422 $ 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 December 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 a $12.0 million participation that was sold and did not meet the conditions for sale accounting, which is included in Other assets and Other liabilities on the consolidated balance sheets as a result. (5) This loan went into default and was put on non-accrual in June 2020 and remains on non-accrual as of December 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) In September 2022, the Company successfully acquired full ownership and control of the property at 245 Park Avenue. See below table and Note 3, "Property Acquisitions." (7) In September 2022, the Company converted its mezzanine loan position secured by the equity interest in 5 Times Square to an equity interest in a joint venture partnership with the existing equity holders. See Note 6, " Investments in Unconsolidated Joint Ventures."
Summary of preferred equity investments	As of December 31, 2022 and 2021, we held the following preferred equity investments with an aggregate weighted average current yield of 6.55% as of December 31, 2022 (dollars in thousands): Type December 31, 2022 December 31, 2022 December 31, 2022 (1) December 31, 2021 (1) Mandatory Redemption (2) Preferred Equity $ — $ 250,000 $ 119,858 $ 112,234 February 2027 Preferred Equity (3) — — — 160,772 Total Preferred Equity $ — $ 250,000 $ 119,858 $ 273,006 Allowance for loan loss $ — $ — $ — $ — Total $ — $ 250,000 $ 119,858 $ 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. On July 8, 2022, certain of the debtors and affiliates of SL Green entered into the Plan, pursuant to which SL Green became the stalking horse bidder for the property. Since the debtors did not receive any qualifying bids for the property and the Plan was confirmed, SL Green acquired full ownership and control of the property in September 2022, at which time our outstanding preferred equity and accrued interest balance were credited to our equity investment in the property. See Note 3, "Property Acquisitions."
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 December 31, 2022 and 2021 (dollars in thousands): Risk Rating December 31, 2022 December 31, 2021 1 - Low Risk Assets - Low probability of loss $ 264,069 $ 644,489 2 - Watch List Assets - Higher potential for loss 352,321 437,344 3 - High Risk Assets - Loss more likely than not 6,890 6,890 $ 623,280 $ 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 December 31, 2022 (dollars in thousands): As of December 31, Risk Rating 2022 (1) 2021 (1) 2020 (1) Prior (1) Total 1 - Low Risk Assets - Low probability of loss $ — $ — $ 174,985 $ 89,084 $ 264,069 2 - Watch List Assets - Higher potential for loss — 77,109 — 275,212 352,321 3 - High Risk Assets - Loss more likely than not — — — 6,890 6,890 $ — $ 77,109 $ 174,985 $ 371,186 $ 623,280 (1) Year in which the investment was originated or acquired by us or in which a material modification occurred.

Investments in Unconsolidated_2

Investments in Unconsolidated Joint Ventures (Tables)	12 Months Ended
	Dec. 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 December 31, 2022: Property Partner Ownership Interest (1) Economic Interest (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 (5) Wharton Properties 50.00% 50.00% 7,131 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% 1,135,000 450 Park Avenue (8) Korean Institutional Investor / Israeli Institutional Investor 50.10% 25.10% 337,000 5 Times Square (9) RXR Realty led investment group 31.55% 31.55% 1,131,735 (1) Ownership interest and economic interest represent the Company's interests in the joint venture as of December 31, 2022. Changes in ownership or economic interests within the current year are disclosed in the notes below. (2) The joint venture 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) During the fourth quarter of 2022, the Company recorded a $6.3 million charge in connection with the pending sale of this investment for a gross consideration of approximately $14.0 million, which closed in February 2023. This charge is included in Depreciable real estate reserves and impairments in the consolidated statement of operations. (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. 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 $501.8 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 December 31, 2022, the total of the two partners' ownership interests based on equity contributed was 40.0%. 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 December 31, 2022 and 2021. (8) The 50.1% ownership interest reflected in this table is comprised of our 25.1% economic interest and a 25.0% economic interest held by a third-party. The third-party's economic interest is held within a joint venture that we consolidate and recognize in Noncontrolling interests in other partnerships on our consolidated balance sheet. An additional third-party owns the remaining 49.9% economic interest in the property. (9) In September 2022, the Company converted its mezzanine loan position secured by the equity interest in 5 Times Square to an equity interest in a joint venture partnership with the existing equity holders. See Note 5, " Debt and Preferred Equity Investments." The following table summarizes the investments in unconsolidated joint ventures sold during the years ended December 31, 2022, 2021, and 2020: Property Ownership Interest Sold Disposition Date Gross Asset Valuation (Loss) Gain on Sale (in millions) (1) (2) Stonehenge Portfolio Various April 2022 $ 1.0 $ — 400 East 57th Street (3) 41.00% September 2021 133.5 (1.0) 605 West 42nd Street - Sky 20.00% June 2021 858.1 8.9 55 West 46th Street - Tower 46 25.00% March 2021 275.0 (15.2) 885 Third Avenue (4) N/A January 2021 N/A N/A 333 East 22nd Street 33.33% December 2020 1.6 3.0 (1) Represents the Company's share of the gain or loss (2) For the year ended December 31, 2021, the (losses) gains on sale are net of $1.4 million of employee compensation accrued in connection with the realization of the investment dispositions. There were no amounts accrued for employee compensation in the years ended December 31, 2022 and 2020. Additionally, amounts do not include adjustments for expenses recorded in subsequent periods. (3) In connection with our agreement to sell the property in April 2021, we recorded a charge of $5.7 million, which is included in Depreciable real estate reserves and impairments in the consolidated statements of operations. (4) In January 2021, pursuant to the partnership documents, certain participating rights of the common member expired. As a result, it was determined that we are the primary beneficiary of the VIE and the investment was consolidated in our financial statements. See Note 3, "Property Acquisitions."
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 December 31, 2022 and 2021, respectively, are as follows (dollars in thousands): Property Economic Interest (1) Current Maturity Date Final Maturity Date (2) Interest Rate (3) December 31, 2022 December 31, 2021 Fixed Rate Debt: 717 Fifth Avenue 10.92 % July 2022 (4) July 2022 (4) 5.02% $ 655,328 $ 655,328 650 Fifth Avenue 50.00 % April 2023 April 2023 5.45% 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% 500,000 500,000 220 East 42nd Street 51.00 % June 2023 June 2025 5.75% 510,000 — 280 Park Avenue 50.00 % September 2023 September 2024 5.81% 1,200,000 — 5 Times Square 31.55 % September 2024 September 2026 7.00% 400,000 — 10 East 53rd Street 55.00 % February 2025 February 2025 5.35% 220,000 — 1515 Broadway 56.87 % March 2025 March 2025 3.93% 782,321 801,845 450 Park Avenue 25.10 % June 2025 June 2027 6.10% 267,000 — 11 Madison Avenue 60.00 % September 2025 September 2025 3.84% 1,400,000 1,400,000 One Madison Avenue (5) 25.50 % November 2025 November 2026 3.94% 467,008 — 800 Third Avenue 60.52 % February 2026 February 2026 3.48% 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 3,000,000 650 Fifth Avenue — 275,000 Stonehenge Portfolio — 195,493 Total fixed rate debt $ 10,855,657 $ 8,216,666 Floating Rate Debt: 1552 Broadway 50.00 % December 2022 (6) December 2022 (6) L+ 2.65% $ 193,132 $ 193,132 11 West 34th Street 30.00 % January 2023 (7) January 2023 (7) L+ 1.45% 23,000 23,000 650 Fifth Avenue 50.00 % April 2023 April 2023 S+ 2.50% 210,000 — 121 Greene Street 50.00 % May 2023 May 2023 S+ 2.10% 12,550 13,228 115 Spring Street 51.00 % September 2023 September 2023 L+ 3.40% 65,550 65,550 2 Herald Square 51.00 % November 2023 November 2023 S+ 2.06% 182,500 200,989 100 Park Avenue 49.90 % December 2023 December 2025 L+ 2.25% 360,000 360,000 15 Beekman (8) 20.00 % January 2024 July 2025 L+ 1.50% 86,738 43,566 5 Times Square 31.55 % September 2024 September 2026 S+ 5.77% 495,924 — 21 East 66th Street 32.28 % June 2033 June 2033 T+ 2.75% 586 632 220 East 42nd Street — 510,000 280 Park Avenue — 1,200,000 10 East 53rd Street — 220,000 One Madison Avenue — 169,629 Total floating rate debt $ 1,629,980 $ 2,999,726 Total joint venture mortgages and other loans payable $ 12,485,637 $ 11,216,392 Deferred financing costs, net (136,683) (130,516) Total joint venture mortgages and other loans payable, net $ 12,348,954 $ 11,085,876 (1) Economic interest represents the Company's interests in the joint venture as of December 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 December 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"), Term SOFR ("S") or 1-year Treasury ("T"). (4) This loan matured in July 2022. The Company is in discussions with the lender on a resolution. (5) 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. (6) In January 2023, the maturity date of the loan was extended by one month. (7) This loan matured in February 2023. The Company is in discussions with the lender on a resolution. (8) This loan is a $125.0 million construction facility. Advances under the loan are subject to costs incurred.
Schedule of combined balance sheets for the unconsolidated joint ventures	The combined balance sheets for the unconsolidated joint ventures, as of December 31, 2022 and 2021, are as follows (in thousands): December 31, 2022 December 31, 2021 Assets (1) Commercial real estate property, net $ 15,989,642 $ 14,763,874 Cash and restricted cash 709,299 768,510 Tenant and other receivables, related party receivables, and deferred rents receivable 601,552 533,455 Other assets 2,551,426 1,776,030 Total assets $ 19,851,919 $ 17,841,869 Liabilities and equity (1) Mortgages and other loans payable, net $ 12,348,954 $ 11,085,876 Deferred revenue/gain 1,077,901 1,158,242 Lease liabilities 1,000,356 980,595 Other liabilities 456,537 352,499 Equity 4,968,171 4,264,657 Total liabilities and equity $ 19,851,919 $ 17,841,869 Company's investments in unconsolidated joint ventures $ 3,190,137 $ 2,997,934 (1) As of December 31, 2022, $547.6 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 years ended December 31, 2022, 2021, and 2020 are as follows (unaudited, in thousands): Year Ended December 31, 2022 2021 2020 Total revenues $ 1,339,364 $ 1,228,364 $ 1,133,217 Operating expenses 240,002 203,332 180,201 Real estate taxes 252,806 225,104 220,633 Operating lease rent 26,152 22,576 24,134 Interest expense, net of interest income 431,865 342,910 325,500 Amortization of deferred financing costs 27,754 31,423 20,427 Depreciation and amortization 465,100 484,130 407,834 Total expenses $ 1,443,679 $ 1,309,475 $ 1,178,729 Loss on early extinguishment of debt (467) (2,017) (194) Net loss before (loss) gain on sale $ (104,782) $ (83,128) $ (45,706) Company's equity in net loss from unconsolidated joint ventures $ (57,958) $ (55,402) $ (25,195)

Deferred Costs (Tables)

Deferred Costs (Tables)	12 Months Ended
	Dec. 31, 2022
Deferred Costs, Capitalized, Prepaid, and Other Assets Disclosure [Abstract]
Schedule of deferred costs	Deferred costs as of December 31, 2022 and 2021 consisted of the following (in thousands): December 31, 2022 2021 Deferred leasing costs $ 407,188 $ 400,419 Less: accumulated amortization (286,031) (275,924) Deferred costs, net $ 121,157 $ 124,495

Mortgages and Other Loans Pay_2

Mortgages and Other Loans Payable (Tables)	12 Months Ended
	Dec. 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 December 31, 2022 and 2021, respectively, were as follows (dollars in thousands): Property Current Maturity Date Final Maturity Date (1) Interest Rate (2) December 31, 2022 December 31, 2021 Fixed Rate Debt: 719 Seventh Avenue September 2023 September 2023 4.70% $ 50,000 $ — 7 Dey / 185 Broadway (3) November 2023 November 2023 7.59% 200,000 — 420 Lexington Avenue October 2024 October 2040 3.99% 283,064 288,660 100 Church Street June 2025 June 2027 5.89% 370,000 — Landmark Square January 2027 January 2027 4.90% 100,000 100,000 485 Lexington Avenue February 2027 February 2027 4.25% 450,000 450,000 245 Park Avenue June 2027 June 2027 4.22% 1,712,750 — 100 Church Street — 200,212 1080 Amsterdam — 34,537 Total fixed rate debt $ 3,165,814 $ 1,073,409 Floating Rate Debt: 7 Dey / 185 Broadway (3) November 2023 November 2023 S+ 2.85% $ 10,148 $ — 690 Madison Avenue July 2024 July 2025 L+ 1.50% 60,000 60,000 719 Seventh Avenue — 50,000 609 Fifth Avenue — 52,882 7 Dey / 185 Broadway (3) — 198,169 Total floating rate debt $ 70,148 $ 361,051 Total fixed rate and floating rate debt $ 3,235,962 $ 1,434,460 Mortgages reclassed to liabilities related to assets held for sale — (34,537) Total mortgages and other loans payable $ 3,235,962 $ 1,399,923 Deferred financing costs, net of amortization (8,399) (5,537) Total mortgages and other loans payable, net $ 3,227,563 $ 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 December 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 Term SOFR ("S"), unless otherwise specified. (3) 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. Both extension options were exercised in October 2021 and 2022, respectively. Advances under the loan are subject to incurred costs and funded equity requirements..

Corporate Indebtedness (Tables)

Corporate Indebtedness (Tables)	12 Months Ended
	Dec. 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 December 31, 2022 and 2021, respectively, by scheduled maturity date (dollars in thousands): Issuance December 31, December 31, December 31, Interest Rate (1) Initial Term Maturity Date December 17, 2015 (2) $ 100,000 $ 100,000 $ 100,000 4.27 % 10 December 2025 October 5, 2017 (3) — — 499,913 3.25 % 5 October 2022 November 15, 2012 — — 301,002 4.50 % 10 December 2022 $ 100,000 $ 100,000 $ 900,915 Deferred financing costs, net (308) (1,607) $ 100,000 $ 99,692 $ 899,308 (1) Interest rate as of December 31, 2022, taking into account interest rate hedges in effect during the period. (2) Issued by the Company and the Operating Partnership as co-obligors. (3) Issued by the Operating Partnership with the Company as the guarantor.
Schedule of combined aggregate principal maturities	Combined aggregate principal maturities of mortgages and other loans payable, the 2021 credit facility, the 2022 term loan, trust preferred securities, senior unsecured notes and our share of joint venture debt as of December 31, 2022, including as-of-right extension options, were as follows (in thousands): Scheduled Principal Revolving Unsecured Term Loans Trust Senior Total Joint 2023 $ 5,827 $ 260,148 $ — $ — $ — $ — $ 265,975 $ 1,155,465 2024 4,488 332,749 — 600,000 — — 937,237 894,655 2025 — 370,000 — — — 100,000 470,000 1,466,750 2026 — — — — — — — 226,224 2027 — 2,262,750 450,000 1,000,000 — — 3,712,750 299,417 Thereafter — — — 50,000 100,000 — 150,000 2,130,404 $ 10,315 $ 3,225,647 $ 450,000 $ 1,650,000 $ 100,000 $ 100,000 $ 5,535,962 $ 6,172,915
Schedule of consolidated interest expense, excluding capitalized interest	Consolidated interest expense, excluding capitalized interest, was comprised of the following (in thousands): Year Ended December 31, 2022 2021 2020 Interest expense before capitalized interest $ 166,493 $ 145,197 $ 185,934 Interest on financing leases 4,555 5,448 8,091 Interest capitalized (82,444) (78,365) (75,167) Amortization of discount on assumed debt 1,855 — — Interest income (986) (1,389) (2,179) Interest expense, net $ 89,473 $ 70,891 $ 116,679

Related Party Transactions (Tab

Related Party Transactions (Tables)	12 Months Ended
	Dec. 31, 2022
Related Party Transactions [Abstract]
Schedule of amounts due from/to related parties	Amounts due from joint ventures and related parties as of December 31, 2022 and 2021 consisted of the following (in thousands): December 31, 2022 2021 Due from joint ventures $ 26,812 $ 28,204 Other 540 1,204 Related party receivables $ 27,352 $ 29,408

Noncontrolling Interests on t_2

Noncontrolling Interests on the Company's Consolidated Financial Statements (Tables)	12 Months Ended
	Dec. 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 twelve months ended December 31, 2022 and 2021 (in thousands): December 31, 2022 2021 Balance at beginning of period $ 344,252 $ 358,262 Distributions (16,272) (15,749) Issuance of common units 22,855 18,678 Redemption and conversion of common units (40,901) (53,289) Net (loss) income (5,794) 25,457 Accumulated other comprehensive income allocation 5,827 1,042 Fair value adjustment (39,974) 9,851 Balance at end of period $ 269,993 $ 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 December 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 unit holder 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 December 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 twelve months ended December 31, 2022 and 2021 (in thousands): December 31, 2022 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 (6,198) (6,760) Accrued dividends on preferred units 6,033 6,706 Balance at end of period $ 177,943 $ 196,075

Stockholders' Equity of the C_2

Stockholders' Equity of the Company (Tables)	12 Months Ended
	Dec. 31, 2022
Stockholders' Equity Note [Abstract]
Class of treasury stock	As of December 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 Year ended 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 years ended December 31, 2022, 2021, and 2020, respectively (dollars in thousands): Year Ended December 31, 2022 2021 2020 Shares of common stock issued 10,839 10,387 16,181 Dividend reinvestments/stock purchases under the DRSPP $ 525 $ 738 $ 1,006
Schedule of earnings per share	SL Green's earnings per share for the years ended December 31, 2022, 2021, and 2020 are computed as follows (in thousands): Year Ended December 31, Numerator 2022 2021 2020 Basic Earnings: (Loss) income attributable to SL Green common stockholders $ (93,024) $ 434,804 $ 356,105 Less: distributed earnings allocated to participating securities (2,219) (2,398) (1,685) Less: undistributed earnings allocated to participating securities — (192) (137) Net (loss) income attributable to SL Green common stockholders (numerator for basic earnings per share) $ (95,243) $ 432,214 $ 354,283 Add back: dilutive effect of earnings allocated to participating securities and contingently issuable shares — 2,039 1,685 Add back: undistributed earnings allocated to participating securities — 192 137 Add back: Effect of dilutive securities (redemption of units to common shares) (5,794) 25,457 20,016 (Loss) income attributable to SL Green common stockholders (numerator for diluted earnings per share) $ (101,037) $ 459,902 $ 376,121 Year Ended December 31, Denominator 2022 2021 2020 Basic Shares: Weighted average common stock outstanding 63,917 65,740 70,397 Effect of Dilutive Securities: Operating Partnership units redeemable for common shares 4,012 3,987 4,096 Stock-based compensation plans — 705 441 Contingently issuable shares — 337 144 Diluted weighted average common stock outstanding 67,929 70,769 75,078

Partners' Capital of the Oper_2

Partners' Capital of the Operating Partnership (Tables)	12 Months Ended
	Dec. 31, 2022
Equity [Abstract]
Schedule of calculation of numerator and denominator in earnings per unit	The Operating Partnership's earnings per unit for the years ended December 31, 2022, 2021, and 2020 respectively are computed as follows (in thousands): Year Ended December 31, Numerator 2022 2021 2020 Basic Earnings: Net (loss) income attributable to SLGOP common unitholders (numerator for diluted earnings per unit) $ (98,818) $ 460,261 $ 376,121 Less: distributed earnings allocated to participating securities (2,219) (2,398) (1,685) Less: undistributed earnings allocated to participating securities — (192) (137) Net (loss) income attributable to SLGOP common unitholders (numerator for basic earnings per unit) $ (101,037) $ 457,671 $ 374,299 Add back: dilutive effect of earnings allocated to participating securities and contingently issuable shares — 2,590 1,822 (Loss) income attributable to SLGOP common unitholders $ (101,037) $ 460,261 $ 376,121 Year Ended December 31, Denominator 2022 2021 2020 Basic units: Weighted average common units outstanding 67,929 69,667 74,493 Effect of Dilutive Securities: Stock-based compensation plans — 765 441 Contingently issuable units — 337 144 Diluted weighted average common units outstanding 67,929 70,769 75,078

Share-based Compensation (Table

Share-based Compensation (Tables)	12 Months Ended
	Dec. 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 December 31, 2022, 2021, and 2020 and changes during the years ended December 31, 2022, 2021, and 2020 are as follows: 2022 2021 2020 Options Outstanding Weighted Average Options Outstanding Weighted Average Options Weighted Balance at beginning of year 394,089 $ 100.56 761,686 $ 105.76 977,745 $ 108.57 Exercised — — (11,314) 72.30 — — Lapsed or canceled (80,609) 112.14 (356,283) 112.56 (216,059) 118.49 Balance at end of year 313,480 $ 97.59 394,089 $ 100.56 761,686 $ 105.76 Options exercisable at end of year 313,480 $ 97.59 394,089 $ 100.56 760,743 $ 105.76
Schedule of other share-based compensation, activity	A summary of the Company's restricted stock as of December 31, 2022, 2021, and 2020 and changes during the years ended December 31, 2022, 2021, and 2020 are as follows: 2022 2021 2020 Balance at beginning of year 3,459,363 3,337,545 3,362,456 Granted 314,995 141,515 8,693 Canceled (16,184) (19,697) (33,604) Balance at end of year 3,758,174 3,459,363 3,337,545 Vested during the year 118,255 122,759 125,064 Compensation expense recorded $ 10,133,905 $ 8,497,054 $ 10,895,459 Total fair value of restricted stock granted during the year $ 16,804,931 $ 9,214,531 $ 734,315

Accumulated Other Comprehensi_2

Accumulated Other Comprehensive Income (Loss) (Tables)	12 Months Ended
	Dec. 31, 2022
Equity [Abstract]
Schedule of accumulated other comprehensive loss	The following tables set forth the changes in accumulated other comprehensive (loss) income by component as of December 31, 2022, 2021 and 2020 (in thousands): Net unrealized gain (loss) on derivative instruments ( 1 ) SL Green’s share of joint venture net unrealized gain (loss) on derivative instruments ( 2 ) Net unrealized gain (loss) on marketable securities Total Balance at December 31, 2019 $ (22,780) $ (7,982) $ 2,277 $ (28,485) Other comprehensive loss before reclassifications (48,532) (7,573) (1,256) (57,361) Amounts reclassified from accumulated other comprehensive loss 13,897 4,702 — 18,599 Balance at December 31, 2020 (57,415) (10,853) 1,021 (67,247) Other comprehensive income (loss) before reclassifications 14,908 (18,015) 96 (3,011) Amounts reclassified from accumulated other comprehensive loss 16,626 6,874 — 23,500 Balance at December 31, 2021 (25,881) (21,994) 1,117 (46,758) Other comprehensive income (loss) before reclassifications 78,300 23,405 (1,359) 100,346 Amounts reclassified from accumulated other comprehensive income (4,619) 635 — (3,984) Balance at December 31, 2022 $ 47,800 $ 2,046 $ (242) $ 49,604 (1) Amount reclassified from accumulated other comprehensive income (loss) is included in interest expense in the respective consolidated statements of operations. As of December 31, 2022 and 2021, the deferred net gains from these terminated hedges, which is included in accumulated other comprehensive income (loss) relating to net unrealized gain (loss) on derivative instruments, was ($0.5 million) and ($0.6 million), respectively. (2) Amount reclassified from accumulated other comprehensive income (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)	12 Months Ended
	Dec. 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 December 31, 2022 and 2021 (in thousands): December 31, 2022 Total Level 1 Level 2 Level 3 Assets: Marketable securities available-for-sale $ 11,240 $ — $ 11,240 $ — Interest rate cap and swap agreements (included in Other assets) $ 57,660 $ — $ 57,660 $ — Liabilities: Interest rate cap and swap agreements (included in Other liabilities) $ 10,142 $ — $ 10,142 $ — 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 December 31, 2022 and December 31, 2021 (in thousands): December 31, 2022 December 31, 2021 Carrying Value (1) Fair Value Carrying Value (1) Fair Value Debt and preferred equity investments $ 623,280 (2) $ 1,088,723 (2) Fixed rate debt $ 5,015,814 $ 4,784,691 $ 3,274,324 $ 3,336,463 Variable rate debt 520,148 519,669 801,051 800,672 Total debt $ 5,535,962 $ 5,304,360 $ 4,075,375 $ 4,137,135 (1) Amounts exclude net deferred financing costs. (2) As of December 31, 2022, debt and preferred equity investments had an estimated fair value ranging between $0.6 billion and $0.6 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)	12 Months Ended
	Dec. 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 December 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 Swap $ 100,000 0.212 % January 2021 January 2023 Other Assets $ 333 Interest Rate Swap 400,000 0.184 % January 2022 February 2023 Other Assets 1,453 Interest Rate Swap 50,000 0.633 % February 2022 February 2023 Other Assets 158 Interest Rate Cap 370,000 3.250 % December 2022 June 2023 Other Assets 2,471 Interest Rate Cap 370,000 3.250 % December 2022 June 2023 Other Liabilities (2,465) Interest Rate Swap 100,000 1.163 % November 2021 July 2023 Other Assets 2,133 Interest Rate Swap 200,000 1.133 % November 2021 July 2023 Other Assets 4,300 Interest Rate Cap 600,000 4.080 % September 2022 September 2023 Other Liabilities (3,341) Interest Rate Cap 50,000 3.500 % October 2022 September 2023 Other Assets 505 Interest Rate Swap 200,000 4.739 % November 2022 November 2023 Other Assets 104 Interest Rate Cap 196,717 3.500 % November 2022 November 2023 Other Assets 2,232 Interest Rate Cap 196,717 3.500 % November 2022 November 2023 Other Liabilities (2,225) Interest Rate Swap 150,000 2.700 % December 2021 January 2024 Other Assets 3,249 Interest Rate Swap 200,000 4.590 % November 2022 January 2024 Other Assets 593 Interest Rate Swap 200,000 4.511 % November 2022 January 2024 Other Assets 750 Interest Rate Swap 150,000 2.721 % December 2021 January 2026 Other Assets 5,848 Interest Rate Swap 200,000 2.762 % December 2021 January 2026 Other Assets 7,601 Interest Rate Swap 100,000 3.003 % February 2023 February 2027 Other Assets 3,264 Interest Rate Swap 100,000 2.833 % February 2023 February 2027 Other Assets 3,888 Interest Rate Swap 50,000 2.563 % February 2023 February 2027 Other Assets 2,441 Interest Rate Swap 200,000 2.691 % February 2023 February 2027 Other Assets 8,823 Interest Rate Swap 300,000 2.966 % July 2023 May 2027 Other Assets 7,514 Interest Rate Swap 370,000 3.888 % November 2022 June 2027 Other Liabilities (1,900) Interest Rate Swap 100,000 3.756 % January 2023 January 2028 Other Liabilities (211) $ 47,518 Notional Value Strike Rate Effective Date Expiration Date Classification Fair Value Interest Rate Cap $ 23,000 4.750 % January 2021 January 2023 $ — Interest Rate Cap 220,000 4.000 % February 2022 February 2023 93 Interest Rate Cap 510,000 3.000 % December 2021 June 2023 4,220 Interest Rate Cap 267,000 4.000 % July 2022 August 2023 1,289 Interest Rate Cap 400,000 3.500 % September 2022 September 2023 3,839 Interest Rate Cap 1,075,000 4.080 % September 2022 September 2023 6,004 Interest Rate Cap 125,000 4.080 % September 2022 September 2023 698 Interest Rate Cap 118,670 0.490 % February 2022 May 2024 22,669 Interest Rate Cap 118,670 0.490 % February 2022 May 2024 22,652 Interest Rate Swap 177,000 1.669 % December 2022 February 2026 12,576 $ 74,040
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 years ended December 31, 2022, 2021, and 2020, respectively (in thousands): Amount of Gain (Loss) Location of Gain (Loss) Reclassified from Accumulated Other Comprehensive Income (Loss) into Income Amount of Gain (Loss) Reclassified from Year Ended Year Ended Derivative 2022 2021 2020 2022 2021 2020 Interest Rate Swaps/Caps $ 83,162 $ 15,643 $ (51,244) Interest expense $ 4,989 $ (17,602) $ (14,569) Share of unconsolidated joint ventures' derivative instruments 24,783 (19,400) (7,977) Equity in net loss from unconsolidated joint ventures (673) (7,582) (4,911) $ 107,945 $ (3,757) $ (59,221) $ 4,316 $ (25,184) $ (19,480)

Lease Income (Tables)

Lease Income (Tables)	12 Months Ended
	Dec. 31, 2022
Leases [Abstract]
Lessor, operating lease, payments to be received, maturity	Future minimum rents to be received over the next five years and thereafter for operating leases in effect at December 31, 2022 are as follows (in thousands): 2023 $ 596,648 2024 569,125 2025 543,287 2026 486,771 2027 415,123 Thereafter 1,718,650 $ 4,329,604
Operating lease, lease income	The components of lease income from operating leases in effect at December 31, 2022 and 2021 were as follows (in thousands): Twelve Months Ended December 31, 2022 2021 Fixed lease payments $ 594,541 $ 600,474 Variable lease payments 82,676 73,542 Total lease payments (1) $ 677,217 $ 674,016 Amortization of acquired above and below-market leases (5,717) 4,160 Total rental revenue $ 671,500 $ 678,176 (1) Amounts include $222.1 million and $229.2 million of sublease income for the years ended December 31, 2022 and 2021, respectively.
Schedule of sales type leases	The table below summarizes our investment in sales-type leases as of December 31, 2022: Property Year of Current Expiration Year of Final Expiration (1) 15 Beekman (2) 2089 2089 (1) Reflects exercise of all available renewal options. (2) In August 2020, the Company formed a joint venture, which then entered into a long-term sublease with the Company for the building at 15 Beekman. See Note 6, "Investments in Unconsolidated Joint Ventures."
Sales-type lease, lease income	The components of lease income from sales-type leases during the years ended December 31, 2022 and 2021 were as follows (in thousands): Twelve Months Ended December 31, 2022 2021 Interest income (1) $ 4,389 $ 4,422 (1) These amounts are included in Other income in our consolidated statements of operations.
Sales-type and direct financing leases, lease receivable, maturity	Future minimum lease payments to be received over the next five years and thereafter for our sales-type leases with initial terms in excess of one year as of December 31, 2022 are as follows (in thousands): Sales-type leases 2023 $ 3,133 2024 3,180 2025 3,228 2026 3,276 2027 3,325 Thereafter 200,169 Total minimum lease payments $ 216,311 Amount representing interest (111,988) Investment in sales-type leases (1) $ 104,323 (1) This amount is included in Other assets in our consolidated balance sheets.

Benefit Plans (Tables)

Benefit Plans (Tables)	12 Months Ended
	Dec. 31, 2022
Retirement Benefits [Abstract]
Schedule of contributions made to multi-employer plans	Contributions we made to the multi-employer plans for the years ended December 31, 2022, 2021 and 2020 are included in the table below (in thousands): Benefit Plan 2022 2021 2020 Pension Plan $ 1,952 $ 1,994 $ 2,480 Health Plan 6,386 6,333 7,688 Other plans 807 849 929 Total plan contributions $ 9,145 $ 9,176 $ 11,097

Commitments and Contingencies (

Commitments and Contingencies (Tables)	12 Months Ended
	Dec. 31, 2022
Commitments and Contingencies Disclosure [Abstract]
Schedule of ground lease arrangements	The table below summarizes our current lease arrangements as of December 31, 2022: Property (1) Year of Current Expiration Year of Final Expiration (2) 711 Third Avenue (3) 2033 2083 1185 Avenue of the Americas 2043 2043 SL Green Headquarters at One Vanderbilt (4) 2043 2048 625 Madison Avenue 2043 2054 420 Lexington Avenue 2050 2080 Summit One Vanderbilt 2058 2070 15 Beekman (5)(6) 2119 2119 (1) All leases are classified as operating leases unless otherwise specified. (2) Reflects exercise of all available extension options. (3) The Company owns 50% of the fee interest. (4) In March 2021, the Company commenced its lease for its corporate headquarters at One Vanderbilt. See note 10, "Related Party Transactions." (5) The Company has an option to purchase the ground lease for a fixed price on a specific date. The lease is classified as a financing lease. (6) In August 2020, the Company entered into a long-term sublease with an unconsolidated joint venture as part of the capitalization of the 15 Beekman development project. See Note 6, "Investments in Unconsolidated Joint Ventures."
Finance lease, liability, maturity	The following is a schedule of future minimum lease payments as evaluated in accordance with ASC 842 for our financing leases and operating leases with initial terms in excess of one year as of December 31, 2022 (in thousands): Financing leases Operating leases 2023 $ 3,133 $ 52,220 2024 3,180 58,068 2025 3,228 58,207 2026 3,276 58,347 2027 3,325 58,358 Thereafter 200,169 1,334,570 Total minimum lease payments $ 216,311 $ 1,619,770 Amount representing interest (112,093) — Amount discounted using incremental borrowing rate — (724,670) Total lease liabilities excluding liabilities related to assets held for sale $ 104,218 $ 895,100 Total lease liabilities $ 104,218 $ 895,100
Schedule of future minimum rental payments for operating leases	The following is a schedule of future minimum lease payments as evaluated in accordance with ASC 842 for our financing leases and operating leases with initial terms in excess of one year as of December 31, 2022 (in thousands): Financing leases Operating leases 2023 $ 3,133 $ 52,220 2024 3,180 58,068 2025 3,228 58,207 2026 3,276 58,347 2027 3,325 58,358 Thereafter 200,169 1,334,570 Total minimum lease payments $ 216,311 $ 1,619,770 Amount representing interest (112,093) — Amount discounted using incremental borrowing rate — (724,670) Total lease liabilities excluding liabilities related to assets held for sale $ 104,218 $ 895,100 Total lease liabilities $ 104,218 $ 895,100
Lease, cost	The following table provides lease cost information for the Company's operating leases for the twelve months ended December 31, 2022 and 2021 (in thousands): Twelve Months Ended December 31, Operating Lease Costs 2022 2021 Operating lease costs before capitalized operating lease costs $ 33,773 $ 30,270 Operating lease costs capitalized (6,830) (3,716) Operating lease costs, net (1) $ 26,943 $ 26,554 (1) This amount is included in Operating lease rent in our consolidated statements of operations. The following table provides lease cost information for the Company's financing leases for the twelve months ended December 31, 2022 and 2021 (in thousands): Twelve Months Ended December 31, Financing Lease Costs 2022 2021 Interest on financing leases before capitalized interest $ 4,555 $ 5,448 Interest on financing leases capitalized — — Interest on financing leases, net (1) 4,555 5,448 Amortization of right-of-use assets (2) 22,112 660 Financing lease costs, net $ 26,667 $ 6,108 (1) These amounts are included in Interest expense, net of interest income in our consolidated statements of operations. (2) These amounts are included in Depreciation and amortization in our consolidated statements of operations.

Segment Information (Tables)

Segment Information (Tables)	12 Months Ended
	Dec. 31, 2022
Segment Reporting [Abstract]
Schedule of selected results of operations and selected asset information	Selected consolidated results of operations for the years ended December 31, 2022, 2021, and 2020, and selected asset information as of December 31, 2022 and 2021, regarding our operating segments are as follows (in thousands): Real Estate Segment Debt and Preferred Equity Segment Total Company Total revenues Years ended: December 31, 2022 $ 745,626 $ 81,113 $ 826,739 December 31, 2021 763,651 80,340 843,991 December 31, 2020 932,581 120,163 1,052,744 Net (loss) income Years ended: December 31, 2022 $ (132,283) $ 55,980 $ (76,303) December 31, 2021 412,393 68,239 480,632 December 31, 2020 354,353 60,405 414,758 Total assets As of: December 31, 2022 $ 11,727,418 $ 628,376 $ 12,355,794 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) $ in Thousands	12 Months Ended
	Dec. 31, 2022 USD ($) ft² building	Dec. 31, 2021 USD ($)	Dec. 31, 2020 USD ($)
Organization
Number of Buildings | building	52
Approximate Square Feet | ft²	29,716,041
Debt and preferred equity investments including investments held by unconsolidated joint ventures	$ 623,280	$ 1,088,723	$ 1,076,542
Managed office properties
Organization
Number of Buildings | building	1
Approximate Square Feet | ft²	300,000
Debt and preferred equity investments including investments held by unconsolidated joint ventures	$ 623,300
Debt and preferred equity investments and other financing receivables included in other balance sheet items	$ 8,500
Service Corporation
Organization
Percentage of ownership in SL Green Management LLC owned by operating partnership (percent)	95%
SLG Management LLC | SL Green Management
Organization
Percentage of ownership in SL Green Management LLC owned by operating partnership (percent)	100%
Operating Partnership | SL Green Operating Partnership
Organization
Noncontrolling interest in the operating partnership (as a percent)	5.39%	5.57%

Organization and Basis of Pre_4

Organization and Basis of Presentation - Schedule of Commercial Office Properties (Details) $ in Thousands	12 Months Ended
	Dec. 31, 2022 USD ($) ft² building shares	Dec. 31, 2021 USD ($)	Dec. 31, 2020 USD ($)
Real estate properties
Number of Buildings | building	52
Approximate Square Feet	29,716,041
Weighted Average Occupancy unaudited (as a percent)	90.30%
Debt and preferred equity investments including investments held by unconsolidated joint ventures | $	$ 623,280	$ 1,088,723	$ 1,076,542
Number of shares to be received on redemption of one unit of limited partnership interests (shares) | shares	1
Commercial properties
Real estate properties
Number of Buildings | building	51
Approximate Square Feet	29,575,659
Weighted Average Occupancy unaudited (as a percent)	90.30%
Consolidated properties
Real estate properties
Number of Buildings | building	28
Approximate Square Feet	12,669,423
Consolidated properties | Commercial properties
Real estate properties
Number of Buildings | building	27
Approximate Square Feet	12,529,041
Consolidated properties | Retail Properties | Manhattan | 7 Dey/185 Broadway
Real estate properties
Approximate Square Feet	140,382
Consolidated properties | Residential Real Estate | Manhattan | 7 Dey/185 Broadway
Real estate properties
Approximate Square Feet	50,206
Unconsolidated properties
Real estate properties
Number of Buildings | building	24
Approximate Square Feet	17,046,618
Unconsolidated properties | Commercial properties
Real estate properties
Number of Buildings | building	24
Approximate Square Feet	17,046,618
Manhattan
Real estate properties
Number of Buildings | building	44
Approximate Square Feet	28,712,859
Weighted Average Occupancy unaudited (as a percent)	90.70%
Manhattan | Office
Real estate properties
Number of Buildings | building	25
Approximate Square Feet	23,961,519
Weighted Average Occupancy unaudited (as a percent)	90.70%
Manhattan | Retail
Real estate properties
Number of Buildings | building	11
Approximate Square Feet	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	4,431,456
Manhattan | Residential
Real estate properties
Number of Buildings | building	1
Approximate Square Feet	140,382
Weighted Average Occupancy unaudited (as a percent)	89.50%
Manhattan | Consolidated properties
Real estate properties
Number of Buildings | building	20
Approximate Square Feet	11,666,241
Manhattan | Consolidated properties | Office
Real estate properties
Number of Buildings | building	13
Approximate Square Feet	9,963,138
Manhattan | Consolidated properties | Retail
Real estate properties
Number of Buildings | building	2
Approximate Square Feet	17,888
Manhattan | Consolidated properties | Development/Redevelopment
Real estate properties
Number of Buildings | building	5
Approximate Square Feet	1,685,215
Manhattan | Consolidated properties | Residential
Real estate properties
Number of Buildings | building	1
Approximate Square Feet	140,382
Manhattan | Unconsolidated properties
Real estate properties
Number of Buildings | building	24
Approximate Square Feet	17,046,618
Manhattan | Unconsolidated properties | Office
Real estate properties
Number of Buildings | building	12
Approximate Square Feet	13,998,381
Manhattan | Unconsolidated properties | Retail
Real estate properties
Number of Buildings | building	9
Approximate Square Feet	301,996
Manhattan | Unconsolidated properties | Development/Redevelopment
Real estate properties
Number of Buildings | building	3
Approximate Square Feet	2,746,241
Manhattan | Unconsolidated properties | Residential
Real estate properties
Number of Buildings | building	0
Approximate Square Feet	0
Suburban | Office
Real estate properties
Number of Buildings | building	7
Approximate Square Feet	862,800
Weighted Average Occupancy unaudited (as a percent)	79.30%
Suburban | Consolidated properties | Office
Real estate properties
Number of Buildings | building	7
Approximate Square Feet	862,800
Suburban | Unconsolidated properties | Office
Real estate properties
Number of Buildings | building	0
Approximate Square Feet	0

Significant Accounting Polici_4

Significant Accounting Policies - Investments in Commercial Real Estate Properties (Details) - USD ($)	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Real Estate [Line Items]
Weighted average amortization period, above-market lease costs	6 years 3 months 18 days
Weighted average amortization period, below-market lease costs	7 years 4 months 24 days
Weighted average amortization period, in-place lease costs	8 years 1 month 6 days
Period from cessation of major construction activity to completion of construction project, maximum	1 year
Depreciation expense (including amortization of the capital lease asset)	$ 190,100,000	$ 187,300,000	$ 277,500,000
Amortization of above and below Market Leases	5,700,000	4,200,000	$ 5,900,000
Identified intangible assets (included in other assets):
Gross amount	403,552,000	199,722,000
Accumulated amortization	(190,066,000)	(182,643,000)
Net	213,486,000	17,079,000
Identified intangible liabilities (included in deferred revenue):
Gross amount	361,338,000	212,767,000
Accumulated amortization	(212,191,000)	(210,262,000)
Net	149,147,000	2,505,000
Net intangible assets reclassed to assets held for sale	0	1,800,000
Net intangible liabilities reclassed to liabilities relates to assets held for sale	0	$ 0
Other Identifiable Assets
Estimated annual amortization
2023	65,130,000
2024	38,982,000
2025	37,298,000
2026	31,381,000
2027	25,058,000
Acquired above-market leases, net of acquired below-market leases
Below Market Lease, Net, Amortization Income, Fiscal Year Maturity [Abstract]
2023	(23,580,000)
2024	(14,878,000)
2025	(14,760,000)
2026	(11,775,000)
2027	$ (11,029,000)
Minimum | Above Market Leases
Real Estate [Line Items]
Estimated useful life of other intangible assets (in years)	1 year
Minimum | Below Market Leases
Real Estate [Line Items]
Estimated useful life of other intangible assets (in years)	1 year
Minimum | In Place Leases
Real Estate [Line Items]
Estimated useful life of other intangible assets (in years)	1 year
Maximum | Above Market Leases
Real Estate [Line Items]
Estimated useful life of other intangible assets (in years)	15 years
Maximum | Below Market Leases
Real Estate [Line Items]
Estimated useful life of other intangible assets (in years)	15 years
Maximum | In Place Leases
Real Estate [Line Items]
Estimated useful life of other intangible assets (in years)	15 years
Building (fee ownership)
Real Estate [Line Items]
Estimated useful life (in years)	40 years
Building (leasehold interest) | Maximum
Real Estate [Line Items]
Estimated useful life (in years)	40 years
Right of use assets - financing leases | Maximum
Real Estate [Line Items]
Estimated useful life (in years)	40 years
Furniture and fixtures | Minimum
Real Estate [Line Items]
Estimated useful life (in years)	4 years
Furniture and fixtures | Maximum
Real Estate [Line Items]
Estimated useful life (in years)	7 years
Building | Minimum
Real Estate [Line Items]
Estimated useful life (in years)	3 years
Building | Maximum
Real Estate [Line Items]
Estimated useful life (in years)	40 years

Significant Accounting Polici_5

Significant Accounting Policies - Investment in Marketable Securities (Details)	12 Months Ended
	Dec. 31, 2022 USD ($) retailAsset security	Dec. 31, 2021 USD ($) security	Dec. 31, 2020 USD ($)
Investment in Marketable Securities
Marketable securities available-for-sale	$ 11,240,000	$ 24,146,000
Equity marketable securities	0	10,606,000
Investments in marketable securities	11,240,000	34,752,000
Proceeds from sale of marketable securities	$ 7,800,000	$ 4,500,000	$ 0
Number of marketable securities sold | security	1	1
Proceeds from the repayment of debt marketable securities	$ 3,700,000
Number of securities repaid | security	1
Number of securities sold | retailAsset	1
Proceeds from sale of equity marketable securities	$ 4,200,000	$ 0
Realized loss	6,500,000
Marketable securities, unrealized gain		600,000
Commercial mortgage-backed securities
Investment in Marketable Securities
Marketable securities available-for-sale	11,240,000	24,146,000
Cost basis of commercial mortgage backed securities	11,500,000	23,000,000
Unrealized loss	300,000	600,000
Fair value of security in a continuous unrealized loss position for less than 12 months	$ 11,200,000	$ 7,200,000
Number of securities in continuous unrealized loss position | security		1

Significant Accounting Polici_6

Significant Accounting Policies - Investments in Unconsolidated Joint Ventures/Deferred Lease Costs/Revenue Recognition/Income Taxes (Details) - USD ($) $ / shares in Units, $ in Millions	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Deferred Lease Costs [Abstract]
Portion of compensation capitalized	$ 6.6	$ 6.2	$ 5.4
Estimated average lease term (in years)	7 years
Days past due for income recognition on debt and preferred equity investments to be suspended	90 days
Income taxes
Federal, state and local tax provision	$ 3.7	$ 2.8	$ 1.2
Dividends per share paid (in dollars per share)	$ 6.17	$ 8.09	$ 5.54
Ordinary Income Dividend
Income taxes
Dividends per share paid (in dollars per share)	2.56	0.50	1.84
Capital Gains Dividend
Income taxes
Dividends per share paid (in dollars per share)	$ 1.17	$ 5.92	$ 3.06

Significant Accounting Polici_7

Significant Accounting Policies - Concentrations of Credit Risk/Reclassification (Details)	12 Months Ended
	Dec. 31, 2022 agreement tenant	Dec. 31, 2021	Dec. 31, 2020
Annualized rent | Customer concentration
Concentration of Credit Risk
Number of tenants (tenants) | tenant	1
Maximum percentage of annualized rent for any one tenant not individually disclosed (percent) (more than)	5%
Annualized rent | One Vanderbilt Avenue | Customer concentration
Concentration of Credit Risk
Percentage of concentration (percent)	14.10%
Annualized rent | 11 Madison Avenue | Customer concentration
Concentration of Credit Risk
Percentage of concentration (percent)	7.80%	10.80%	8.20%
Annualized rent | 245 Park Avenue | Customer concentration
Concentration of Credit Risk
Percentage of concentration (percent)	10%
Annualized rent | 420 Lexington Avenue | Customer concentration
Concentration of Credit Risk
Percentage of concentration (percent)	6.30%	8.30%	7.50%
Annualized rent | 1515 Broadway | Customer concentration
Concentration of Credit Risk
Percentage of concentration (percent)	5.80%	8.10%	6.60%
Annualized rent | 1185 Avenue of the Americas | Customer concentration
Concentration of Credit Risk
Percentage of concentration (percent)	5.10%	8%	6.90%
Annualized rent | 280 Park Avenue | Customer concentration
Concentration of Credit Risk
Percentage of concentration (percent)	5.10%	6.70%	5.40%
Annualized rent | 220 East 42nd Street | Customer concentration
Concentration of Credit Risk
Percentage of concentration (percent)			5.90%
Annualized rent | 919 Third Avenue | Customer concentration
Concentration of Credit Risk
Percentage of concentration (percent)		5.30%
Annualized rent | 485 Lexington Avenue | Customer concentration
Concentration of Credit Risk
Percentage of concentration (percent)		5.30%
Annualized rent | 555 West 57th Street | Customer concentration
Concentration of Credit Risk
Percentage of concentration (percent)		5.20%
Collective bargaining arrangements | Workforce concentration
Concentration of Credit Risk
Percentage of concentration (percent)	58.10%
Number of collective bargaining agreements | agreement	5
Workforce Subject to Collective Bargaining Arrangements Expiring within One Year | Workforce concentration
Concentration of Credit Risk
Percentage of concentration (percent)	44.10%
Tenant 1 | Annualized rent | Customer concentration
Concentration of Credit Risk
Percentage of concentration (percent)	5.40%

Property Acquisitions - 2022 Ac

Property Acquisitions - 2022 Acquisitions (Details) $ in Millions	Dec. 31, 2022 USD ($) ft²
Business Acquisition [Line Items]
Approximate Square Feet	29,716,041
245 Park Avenue
Business Acquisition [Line Items]
Approximate Square Feet	1,782,793
Gross Asset Valuation (in millions) | $	$ 1,960

Property Acquisitions - 2021 Ac

Property Acquisitions - 2021 Acquisitions (Details) $ in Millions	Dec. 31, 2022 ft²	Dec. 31, 2021 USD ($) ft²
Business Acquisition [Line Items]
Approximate Square Feet	29,716,041
885 Third Avenue - Office Condominium Units (3)
Business Acquisition [Line Items]
Approximate Square Feet		625,000
Gross Asset Valuation (in millions) | $		$ 387.9
461 Fifth Avenue
Business Acquisition [Line Items]
Approximate Square Feet		200,000
Gross Asset Valuation (in millions) | $		$ 28
1591-1597 Broadway (Crowne Plaza)
Business Acquisition [Line Items]
Approximate Square Feet		7,684
Gross Asset Valuation (in millions) | $		$ 121
690 Madison Avenue
Business Acquisition [Line Items]
Approximate Square Feet		7,848
Gross Asset Valuation (in millions) | $		$ 72.2

Property Acquisitions - 2020 Ac

Property Acquisitions - 2020 Acquisitions (Details) $ in Millions	1 Months Ended
	Jan. 31, 2020	Dec. 31, 2022 ft²	Dec. 31, 2020 USD ($) ft²
Business Acquisition [Line Items]
Approximate Square Feet		29,716,041
762 Madison Avenue
Business Acquisition [Line Items]
Approximate Square Feet			6,109
Gross Asset Valuation (in millions) | $			$ 29.3
Interest acquired	10%
707 Eleventh Avenue
Business Acquisition [Line Items]
Approximate Square Feet			159,720
Gross Asset Valuation (in millions) | $			$ 90
15 Beekman
Business Acquisition [Line Items]
Approximate Square Feet			98,412
Gross Asset Valuation (in millions) | $			$ 0
Ground leases, term of contract	99 years
590 Fifth Avenue
Business Acquisition [Line Items]
Approximate Square Feet			103,300
Gross Asset Valuation (in millions) | $			$ 107.2

Properties Held for Sale and _3

Properties Held for Sale and Property Dispositions (Details)

1 Months Ended

12 Months Ended

Jun. 30, 2022 USD ($) ft²

May 31, 2022 USD ($) ft²

Apr. 30, 2022 USD ($) ft²

Feb. 28, 2022 USD ($) ft²

Dec. 31, 2021 USD ($) ft²

Oct. 31, 2021 USD ($) ft²

Jul. 31, 2021 USD ($) ft²

Jun. 30, 2021 USD ($) ft²

Mar. 31, 2021 USD ($) ft²

Feb. 28, 2021 USD ($) ft²

Jan. 31, 2021 USD ($) ft²

Dec. 31, 2020 USD ($) ft²

Sep. 30, 2020 USD ($) ft²

May 31, 2020 USD ($) ft²

Mar. 30, 2020 USD ($)

Dec. 31, 2022 USD ($) ft²

Dec. 31, 2021 USD ($) ft²

Dec. 31, 2020 USD ($) ft²

Mar. 31, 2020 USD ($) ft²

Property Dispositions and Assets Held for Sale

Unaudited Approximate Usable Square Feet | ft²

29,716,041

Employee-related liabilities

$ 1,400,000

$ 0

$ 0

$ 1,400,000

$ 0

Ownership percentage deconsolidated

51%

Investment fair value adjustment

$ 206,800,000

Discontinued Operation, Gain (Loss) On Disposal, Statement Of Income Or Comprehensive Income, Extensible Enumeration, Not Disclosed Flag

investment dispositions

investment dispositions

investment dispositions

885 Third Avenue - Office Condominium Units (3)

Property Dispositions and Assets Held for Sale

Unaudited Approximate Usable Square Feet | ft²

218,796

885 Third Avenue - Office Condominium Units (3)

Property Dispositions and Assets Held for Sale

Unaudited Approximate Usable Square Feet | ft²

414,317

414,317

Sales price

$ 300,400,000

(Loss) Gain on Sale

$ (24,000,000)

609 Fifth Avenue

Property Dispositions and Assets Held for Sale

Unaudited Approximate Usable Square Feet | ft²

138,563

21,437

Sales price

$ 100,500,000

$ 168,000,000

(Loss) Gain on Sale

$ (80,200,000)

$ 63,300,000

1591-1597 Broadway (Crowne Plaza)

Property Dispositions and Assets Held for Sale

Unaudited Approximate Usable Square Feet | ft²

7,684

Sales price

$ 121,000,000

(Loss) Gain on Sale

$ (4,500,000)

1080 Amsterdam Avenue

Property Dispositions and Assets Held for Sale

Unaudited Approximate Usable Square Feet | ft²

85,250

Sales price

$ 42,700,000

(Loss) Gain on Sale

$ 17,900,000

707 Eleventh Avenue

Property Dispositions and Assets Held for Sale

Unaudited Approximate Usable Square Feet | ft²

159,720

Sales price

$ 95,000,000

(Loss) Gain on Sale

$ (800,000)

Charge in connection with classification to assets held for sale

$ 15,000,000

110 East 42nd Street

Property Dispositions and Assets Held for Sale

Unaudited Approximate Usable Square Feet | ft²

215,400

215,400

Sales price

$ 117,100,000

$ 117,100,000

(Loss) Gain on Sale

3,600,000

590 Fifth Avenue

Property Dispositions and Assets Held for Sale

Unaudited Approximate Usable Square Feet | ft²

103,300

Sales price

$ 103,000,000

(Loss) Gain on Sale

$ (3,200,000)

220 East 42nd Street

Property Dispositions and Assets Held for Sale

Unaudited Approximate Usable Square Feet | ft²

1,135,000

Sales price

$ 783,500,000

(Loss) Gain on Sale

$ 175,100,000

Ownership interest disposed

49%

635-641 Sixth Avenue

Property Dispositions and Assets Held for Sale

Unaudited Approximate Usable Square Feet | ft²

267,000

Sales price

$ 325,000,000

(Loss) Gain on Sale

$ 99,400,000

106 Spring Street

Property Dispositions and Assets Held for Sale

Unaudited Approximate Usable Square Feet | ft²

5,928

Sales price

$ 35,000,000

(Loss) Gain on Sale

$ (2,800,000)

133 Greene Street

Property Dispositions and Assets Held for Sale

Unaudited Approximate Usable Square Feet | ft²

6,425

Sales price

$ 15,800,000

(Loss) Gain on Sale

$ 200,000

712 Madison Avenue

Property Dispositions and Assets Held for Sale

Unaudited Approximate Usable Square Feet | ft²

6,600

Sales price

$ 43,000,000

(Loss) Gain on Sale

$ (1,400,000)

30 East 40th Street

Property Dispositions and Assets Held for Sale

Unaudited Approximate Usable Square Feet | ft²

69,446

69,446

Sales price

$ 5,200,000

$ 5,200,000

(Loss) Gain on Sale

$ (1,600,000)

1055 Washington Boulevard

Property Dispositions and Assets Held for Sale

Unaudited Approximate Usable Square Feet | ft²

182,000

182,000

Sales price

$ 23,800,000

$ 23,800,000

(Loss) Gain on Sale

$ (11,500,000)

Williamsburg Terrace

Property Dispositions and Assets Held for Sale

Unaudited Approximate Usable Square Feet | ft²

52,000

52,000

Sales price

$ 32,000,000

$ 32,000,000

(Loss) Gain on Sale

$ 11,800,000

410 Tenth Avenue

Property Dispositions and Assets Held for Sale

Unaudited Approximate Usable Square Feet | ft²

638,000

638,000

Sales price

$ 952,500,000

$ 952,500,000

(Loss) Gain on Sale

56,400,000

400 East 58th Street

Property Dispositions and Assets Held for Sale

Unaudited Approximate Usable Square Feet | ft²

140,000

Sales price

$ 62,000,000

(Loss) Gain on Sale

$ 8,300,000

315 West 33rd Street - The Olivia

Property Dispositions and Assets Held for Sale

Unaudited Approximate Usable Square Feet | ft²

492,987

Sales price

$ 446,500,000

(Loss) Gain on Sale

$ 71,800,000

Properties Sold In 2022, 2021, And 2020

Property Dispositions and Assets Held for Sale

Employee-related liabilities

$ 13,700,000

$ 10,500,000

$ 11,200,000

$ 13,700,000

$ 10,500,000

Debt and Preferred Equity Inv_3

Debt and Preferred Equity Investments - Roll Forward of Net Book Balances (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 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	(565,940)	(201,446)
Net change in loan loss reserves	0	6,583
Balance at end of period	623,280	1,088,723
Debt investment
SEC Schedule, 12-29, Real Estate Companies, Investment in Movement in Mortgage Loans on Real Estate [Roll Forward]
Originations/fundings/accretion	62,992	193,824
Preferred equity investments
SEC Schedule, 12-29, Real Estate Companies, Investment in Movement in Mortgage Loans on Real Estate [Roll Forward]
Originations/fundings/accretion	$ 37,505	$ 13,220

Debt and Preferred Equity Inv_4

Debt and Preferred Equity Investments - Debt and Preferred Equity Investments (Details) - USD ($) $ in Thousands	Dec. 31, 2022	Dec. 31, 2021
Debt Instrument [Line Items]
Carrying value	$ 623,280	$ 1,088,723
Senior Financing	1,941,780
Mezzanine Debt
Debt Instrument [Line Items]
Carrying value	503,422
Senior Financing	1,691,780
Preferred Equity
Debt Instrument [Line Items]
Carrying value	119,858
Senior Financing	250,000
Total floating rate
Debt Instrument [Line Items]
Carrying value	144,056
Face Value	144,402
Total floating rate | Mezzanine Debt
Debt Instrument [Line Items]
Carrying value	144,056
Face Value	144,402
Total floating rate | Preferred Equity
Debt Instrument [Line Items]
Carrying value	0
Face Value	$ 0
Total floating rate | LIBOR | Minimum | Mezzanine Debt
Debt Instrument [Line Items]
Basis spread on variable rate	4.95%
Total floating rate | LIBOR | Maximum | Mezzanine Debt
Debt Instrument [Line Items]
Basis spread on variable rate	12.38%
Total fixed rate
Debt Instrument [Line Items]
Carrying value	$ 479,224
Face Value	487,319
Total fixed rate | Mezzanine Debt
Debt Instrument [Line Items]
Carrying value	359,366
Face Value	367,461
Total fixed rate | Preferred Equity
Debt Instrument [Line Items]
Carrying value	119,858
Face Value	$ 119,858
Interest rate	6.50%
Total fixed rate | Minimum | Mezzanine Debt
Debt Instrument [Line Items]
Interest rate	7%
Total fixed rate | Maximum | Mezzanine Debt
Debt Instrument [Line Items]
Interest rate	14.30%

Debt and Preferred Equity Inv_5

Debt and Preferred Equity Investments - Rollforward of Total Allowance for Loan Loss Reserves (Details) $ in Thousands	12 Months Ended
	Dec. 31, 2022 USD ($) loan	Dec. 31, 2021 USD ($)	Dec. 31, 2020 USD ($)
Loan loss reserve activity
Balance at beginning of year	$ 6,630	$ 13,213	$ 1,750
Current period provision for loan loss	0	0	20,693
Write-offs charged against the allowance	0	(6,583)	(37,033)
Balance at end of year	$ 6,630	6,630	13,213
Number of financing receivables on non-accrual without allowance for loan loss | loan	1
Financing receivable on non-accrual without allowance	$ 225,400
Cumulative Effect, Period of Adoption, Adjustment
Loan loss reserve activity
Balance at beginning of year	$ 0	0	27,803
Balance at end of year		$ 0	$ 0

Debt and Preferred Equity Inv_6

Debt and Preferred Equity Investments - Investment In Financing Receivable (Details) - USD ($) $ in Thousands	Dec. 31, 2022	Dec. 31, 2021
Financing Receivable, Credit Quality Indicator [Line Items]
Carrying value	$ 623,280	$ 1,088,723
2021	0
2020	77,109
2019	174,985
Prior	371,186
1 - Low Risk Assets - Low probability of loss
Financing Receivable, Credit Quality Indicator [Line Items]
Carrying value	264,069	644,489
2021	0
2020	0
2019	174,985
Prior	89,084
2 - Watch List Assets - Higher potential for loss
Financing Receivable, Credit Quality Indicator [Line Items]
Carrying value	352,321	437,344
2021	0
2020	77,109
2019	0
Prior	275,212
3 - High Risk Assets - Loss more likely than not
Financing Receivable, Credit Quality Indicator [Line Items]
Carrying value	6,890	$ 6,890
2021	0
2020	0
2019	0
Prior	$ 6,890

Debt and Preferred Equity Inv_7

Debt and Preferred Equity Investments - Debt Investments (Details) - USD ($)	12 Months Ended	17 Months Ended
	Dec. 31, 2022	Dec. 31, 2022	Dec. 31, 2021
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]
Mortgage loans on real estate, interest rate	6.46%
Debt Investments Held [Abstract]
Carrying value	$ 623,280,000	$ 623,280,000	$ 1,088,723,000
Carrying value	623,280,000	623,280,000	1,088,723,000
Loan interest income		0
Mezzanine Loan Due June 2023
Debt Investments Held [Abstract]
Loan interest income	0
Mezzanine Loan Due June 2024
Debt Investments Held [Abstract]
Loan interest income	0
Amount participated out	12,000,000	12,000,000
Debt investment
Debt Investments Held [Abstract]
Future Funding Obligations	21,685,000	21,685,000
Senior Financing	1,691,780,000	1,691,780,000
Carrying value	503,422,000	503,422,000	815,717,000
Allowance for loan loss	(6,630,000)	(6,630,000)	(6,630,000)
Total fixed rate
Debt Investments Held [Abstract]
Future Funding Obligations	0	0
Senior Financing	969,562,000	969,562,000
Carrying value	365,842,000	365,842,000	527,377,000
Total fixed rate | Mezzanine Loan Due June 2023
Debt Investments Held [Abstract]
Future Funding Obligations	0	0
Senior Financing	401,269,000	401,269,000
Carrying value	225,367,000	225,367,000	225,367,000
Total fixed rate | Mezzanine Loan Due June 2023, 2
Debt Investments Held [Abstract]
Future Funding Obligations	0	0
Senior Financing	283,293,000	283,293,000
Carrying value	77,109,000	77,109,000	66,873,000
Total fixed rate | Mezzanine Loan Due June 2024
Debt Investments Held [Abstract]
Future Funding Obligations	0	0
Senior Financing	105,000,000	105,000,000
Carrying value	13,366,000	13,366,000	13,366,000
Total fixed rate | Mezzanine Loan Due January 2025
Debt Investments Held [Abstract]
Future Funding Obligations	0	0
Senior Financing	95,000,000	95,000,000
Carrying value	30,000,000	30,000,000	30,000,000
Total fixed rate | Mezzanine Loan Due December 2029
Debt Investments Held [Abstract]
Future Funding Obligations	0	0
Senior Financing	85,000,000	85,000,000
Carrying value	20,000,000	20,000,000	20,000,000
Total fixed rate | Mezzanine Loan Paid Off
Debt Investments Held [Abstract]
Future Funding Obligations	0	0
Senior Financing	0	0
Carrying value	0	0	43,521,000
Total fixed rate | Mortgage Loan Paid Off
Debt Investments Held [Abstract]
Future Funding Obligations	0	0
Senior Financing	0	0
Carrying value	0	0	73,000,000
Total fixed rate | Mezzanine Loan Paid Off, 2
Debt Investments Held [Abstract]
Future Funding Obligations	0	0
Senior Financing	0	0
Carrying value	0	0	55,250,000
Total floating rate
Debt Investments Held [Abstract]
Future Funding Obligations	21,685,000	21,685,000
Senior Financing	722,218,000	722,218,000
Carrying value	144,210,000	144,210,000	294,970,000
Total floating rate | Mezzanine Loan Paid Off
Debt Investments Held [Abstract]
Future Funding Obligations	0	0
Senior Financing	0	0
Carrying value	0	0	133,735,000
Total floating rate | Mezzanine Loan Due April 2023
Debt Investments Held [Abstract]
Future Funding Obligations	0	0
Senior Financing	275,000,000	275,000,000
Carrying value	50,000,000	50,000,000	49,998,000
Total floating rate | Mezzanine Loan Due May 2023
Debt Investments Held [Abstract]
Future Funding Obligations	3,761,000	3,761,000
Senior Financing	54,000,000	54,000,000
Carrying value	8,243,000	8,243,000	8,050,000
Total floating rate | Mezzanine Loan Due May 2023, 2
Debt Investments Held [Abstract]
Future Funding Obligations	17,924,000	17,924,000
Senior Financing	207,134,000	207,134,000
Carrying value	46,884,000	46,884,000	30,802,000
Total floating rate | Mezzanine Loan Due July 2023
Debt Investments Held [Abstract]
Future Funding Obligations	0	0
Senior Financing	186,084,000	186,084,000
Carrying value	39,083,000	39,083,000	37,511,000
Total floating rate | Mortgage And Mezzanine Loan Paid Off
Debt Investments Held [Abstract]
Future Funding Obligations	0	0
Senior Financing	0	0
Carrying value	$ 0	$ 0	$ 34,874,000

Debt and Preferred Equity Inv_8

Debt and Preferred Equity Investments - Preferred Equity Investments (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021
Preferred equity investment
Mortgage loans on real estate, interest rate	6.46%
Carrying value	$ 623,280	$ 1,088,723
Preferred equity investments
Preferred equity investment
Mortgage loans on real estate, interest rate	6.55%
Future Funding Obligations	$ 0
Senior Financing	250,000
Carrying value	119,858	273,006
Allowance for loan loss	0	0
Total after allowance for loan loss	119,858	273,006
Preferred Equity, February 2027
Preferred equity investment
Future Funding Obligations	0
Senior Financing	250,000
Carrying value	119,858	112,234
Preferred Equity, Paid Off
Preferred equity investment
Future Funding Obligations	0
Senior Financing	0
Carrying value	$ 0	$ 160,772

Debt and Preferred Equity Inv_9

Debt and Preferred Equity Investments - Narrative (Details)	12 Months Ended		17 Months Ended
	Dec. 31, 2022 USD ($) investment segment	Dec. 31, 2021 USD ($) segment investment	Dec. 31, 2022 USD ($) investment
Preferred equity investment
Number of investments, nonperforming | investment	1	1	1
Debt and preferred equity investments	$ 623,280,000	$ 1,088,723,000	$ 623,280,000
Recorded investment, past due	$ 623,280,000	$ 1,088,723,000	623,280,000
Number of portfolio segments of financial receivables (segment) | segment	1	1
Financing receivable, nonaccrual status	$ 5,800,000		5,800,000
Loan interest income			0
Affiliated Entity
Preferred equity investment
Additional amount of financing receivables included in other assets	9,000,000	$ 10,500,000	9,000,000
Financing Receivables, Equal to Greater than 90 Days Past Due
Preferred equity investment
Recorded investment, past due	0	0	0
Preferred equity investments
Preferred equity investment
Debt and preferred equity investments	119,858,000	$ 273,006,000	119,858,000
Preferred equity investments | Preferred equity investments
Preferred equity investment
Debt and preferred equity investments	$ 6,900,000		$ 6,900,000

Investments in Unconsolidated_3

Investments in Unconsolidated Joint Ventures - Additional Information (Details) $ in Thousands	3 Months Ended	12 Months Ended
	Dec. 31, 2022 USD ($) ft² unit partner	Dec. 31, 2021 USD ($)	Dec. 31, 2020 USD ($)	Jul. 31, 2021
General information on each joint venture
Investments in unconsolidated joint ventures | $	$ 3,190,137	$ 2,997,934
Net equity investment in VIEs in which the entity is not primary beneficiary | $	$ 86,200	85,600
Approximate Square Feet	29,716,041
Ownership percentage deconsolidated				51%
Investment fair value adjustment | $		206,800
21 East 66th Street | Three Retail and Two Residential Units
General information on each joint venture
Number of stores | unit	3
Number of residential units | unit	1
21 East 66th Street | Three Residential Units
General information on each joint venture
Number of residential units | unit	2
Joint venture
General information on each joint venture
Investments in unconsolidated joint ventures | $	$ 3,190,137
Equity method investments with negative book value | $	$ 110,200
Prudential Real Estate Investors | Joint venture | 100 Park Avenue
General information on each joint venture
Ownership interest	49.90%
Economic Interest, percent	49.90%
Approximate Square Feet	834,000
Wharton Properties / Private Investor | Joint venture | 717 Fifth Avenue
General information on each joint venture
Ownership interest	10.92%
Economic Interest, percent	10.92%
Approximate Square Feet	119,500
Private Investors | 21 East 66th Street | Three Retail and Two Residential Units
General information on each joint venture
Ownership interest	32.28%
Private Investors | 21 East 66th Street | Three Residential Units
General information on each joint venture
Ownership interest	16.14%
Private Investors | Joint venture | 800 Third Avenue
General information on each joint venture
Ownership interest	60.52%
Economic Interest, percent	60.52%
Approximate Square Feet	526,000
Private Investors | Joint venture | 21 East 66th Street
General information on each joint venture
Ownership interest	32.28%
Economic Interest, percent	32.28%
Approximate Square Feet	13,069
Private Investors | Joint venture | 115 Spring Street
General information on each joint venture
Ownership interest	51%
Economic Interest, percent	51%
Approximate Square Feet	5,218
New York State Teacher's Retirement System | Joint venture | 919 Third Avenue
General information on each joint venture
Ownership interest	51%
Economic Interest, percent	51%
Approximate Square Feet	1,454,000
Private Investor / Wharton Properties | Joint venture | 11 West 34th Street
General information on each joint venture
Ownership interest	30%
Economic Interest, percent	30%
Approximate Square Feet	17,150
Vornado Realty Trust | Joint venture | 280 Park Avenue
General information on each joint venture
Ownership interest	50%
Economic Interest, percent	50%
Approximate Square Feet	1,219,158
Wharton Properties | Joint venture | Broadway 1552 to 1560
General information on each joint venture
Ownership interest	50%
Economic Interest, percent	50%
Approximate Square Feet	57,718
Wharton Properties | Joint venture | 650 Fifth Avenue
General information on each joint venture
Ownership interest	50%
Economic Interest, percent	50%
Approximate Square Feet	69,214
Wharton Properties | Joint venture | 121 Greene Street (5)
General information on each joint venture
Ownership interest	50%
Economic Interest, percent	50%
Approximate Square Feet	7,131
Asset impairment loss | $	$ 6,300
Gross asset valuation of property to be sold | $	$ 14,000
Canadian Pension Plan Investment Board | Joint venture | 10 East 53rd Street
General information on each joint venture
Ownership interest	55%
Economic Interest, percent	55%
Approximate Square Feet	354,300
PGIM Real Estate | Joint venture | 11 Madison Avenue
General information on each joint venture
Ownership interest	60%
Economic Interest, percent	60%
Approximate Square Feet	2,314,000
National Pension Service of Korea / Hines Interest LP | Joint venture | One Vanderbilt Avenue
General information on each joint venture
Ownership interest	71.01%
Economic Interest, percent	71.01%
Approximate Square Feet	1,657,198
RXR Realty / New York REIT | Joint venture | Worldwide Plaza
General information on each joint venture
Ownership interest	24.95%
Economic Interest, percent	24.95%
Approximate Square Feet	2,048,725
Allianz Real Estate of America | Joint venture | 1515 Broadway
General information on each joint venture
Ownership interest	56.87%
Economic Interest, percent	56.87%
Approximate Square Feet	1,750,000
Israeli Institutional Investor | Joint venture | 2 Herald Square
General information on each joint venture
Ownership interest	51%
Economic Interest, percent	51%
Approximate Square Feet	369,000
A Fund Managed By Meritz Alternative Investment Management | Joint venture | 15 Beekman
General information on each joint venture
Ownership interest	20%
Economic Interest, percent	20%
Approximate Square Feet	221,884
A Fund Managed By Meritz Alternative Investment Management | Joint venture | 220 East 42nd Street
General information on each joint venture
Ownership interest	51%
Economic Interest, percent	51%
Approximate Square Feet	1,135,000
Wells Fargo | Joint venture | 85 Fifth Avenue
General information on each joint venture
Ownership interest	36.27%
Economic Interest, percent	36.27%
Approximate Square Feet	12,946
National Pension Service of Korea / Hines Interest LP / International Investor
General information on each joint venture
Investment in joint venture aggregate equity committed by partner | $		$ 259,300	$ 501,800
Investment in joint venture aggregate maximum ownership percentage		25%	49.50%
Investment in joint venture, number of partners | partner	2
Investment in joint venture, partners' ownership percentage	40%
National Pension Service of Korea / Hines Interest LP / International Investor | One Madison Avenue
General information on each joint venture
Ownership percentage deconsolidated			50.50%
Investment fair value adjustment | $			$ 187,500
National Pension Service of Korea / Hines Interest LP / International Investor | Joint venture | One Madison Avenue
General information on each joint venture
Ownership interest	25.50%
Economic Interest, percent	25.50%
Approximate Square Feet	1,048,700
Korean Institutional Investor / Israeli Institutional Investor | 450 Park Avenue | Third-Party
General information on each joint venture
Ownership interest	49.90%
Investment in joint venture, partners' ownership percentage	25%
Korean Institutional Investor / Israeli Institutional Investor | Joint venture | 450 Park Avenue
General information on each joint venture
Ownership interest	50.10%
Economic Interest, percent	25.10%
Approximate Square Feet	337,000
Investment in joint venture, ownership percentage	25.10%
RXR Realty led investment group | Joint venture | 5 Times Square
General information on each joint venture
Ownership interest	31.55%
Economic Interest, percent	31.55%
Approximate Square Feet	1,131,735

Investments in Unconsolidated_4

Investments in Unconsolidated Joint Ventures - Acquisition, Development and Construction Arrangements/Sale of Joint Venture Interest or Property (Details) - USD ($)	1 Months Ended						12 Months Ended
	Apr. 30, 2022	Sep. 30, 2021	Jun. 30, 2021	Apr. 30, 2021	Mar. 31, 2021	Dec. 31, 2020	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Schedule of Equity Method Investments [Line Items]
(Loss) Gain on Sale							$ (131,000)	$ (32,757,000)	$ 2,961,000
Employee-related liabilities						$ 0	$ 0	$ 1,400,000	$ 0
East 400 47th Street
Schedule of Equity Method Investments [Line Items]
Asset impairment loss				$ 5,700,000
Joint venture | East 400 47th Street | BlackRock, Inc And Stonehenge Partners
Schedule of Equity Method Investments [Line Items]
Ownership Interest Sold		41%
Gross Asset Valuation		$ 133,500,000
(Loss) Gain on Sale		$ (1,000,000)
Joint venture | 605 West 42nd Street - Sky | The Moinian Group
Schedule of Equity Method Investments [Line Items]
Ownership Interest Sold			20%
Gross Asset Valuation			$ 858,100,000
(Loss) Gain on Sale			$ 8,900,000
Joint venture | 55 West 46th Street - Tower 46 | Prudential Real Estate Investors
Schedule of Equity Method Investments [Line Items]
Ownership Interest Sold					25%
Gross Asset Valuation					$ 275,000,000
(Loss) Gain on Sale					$ (15,200,000)
Joint venture | 333 East 22nd Street | Various Partners
Schedule of Equity Method Investments [Line Items]
Ownership Interest Sold						33.33%			33.33%
Gross Asset Valuation						$ 1,600,000			$ 1,600,000
(Loss) Gain on Sale						$ 3,000,000
Joint venture | Stonehenge Portfolio
Schedule of Equity Method Investments [Line Items]
Gross Asset Valuation	$ 1,000,000
(Loss) Gain on Sale	$ 0

Investments in Unconsolidated_5

Investments in Unconsolidated Joint Ventures - Mortgages and Other Loans Payable (Details)	12 Months Ended
	Dec. 31, 2022 USD ($) extension	Dec. 31, 2021 USD ($)
Debt Instrument [Line Items]
Total fixed rate debt	$ 3,165,814,000	$ 1,073,409,000
Total floating rate debt	70,148,000	361,051,000
Deferred financing costs, net	(8,399,000)	(5,537,000)
Joint venture
Debt Instrument [Line Items]
Total fixed rate debt	10,855,657,000	8,216,666,000
Total floating rate debt	1,629,980,000	2,999,726,000
Total fixed rate and floating rate debt	12,485,637,000	11,216,392,000
Deferred financing costs, net	(136,683,000)	(130,516,000)
Total joint venture mortgages and other loans payable, net	$ 12,348,954,000	11,085,876,000
Joint venture | 717 Fifth Avenue | Wharton Properties / Private Investor
Debt Instrument [Line Items]
Economic Interest, percent	10.92%
Joint venture | 650 Fifth Avenue
Debt Instrument [Line Items]
Total fixed rate debt	$ 0	275,000,000
Joint venture | 650 Fifth Avenue | Wharton Properties
Debt Instrument [Line Items]
Economic Interest, percent	50%
Interest rate, floating rate debt (as a percent)	2.50%
Total floating rate debt	$ 210,000,000	0
Joint venture | 21 East 66th Street | Private Investors
Debt Instrument [Line Items]
Economic Interest, percent	32.28%
Interest rate, fixed rate debt (as a percent)	3.60%
Total fixed rate debt	$ 12,000,000	12,000,000
Joint venture | 21 East 66th Street | RXR Realty led investment group
Debt Instrument [Line Items]
Interest rate, floating rate debt (as a percent)	2.75%
Total floating rate debt	$ 586,000	632,000
Joint venture | 919 Third Avenue | New York State Teacher's Retirement System
Debt Instrument [Line Items]
Economic Interest, percent	51%
Interest rate, fixed rate debt (as a percent)	5.12%
Total fixed rate debt	$ 500,000,000	500,000,000
Joint venture | 220 East 42nd Street | A Fund Managed By Meritz Alternative Investment Management
Debt Instrument [Line Items]
Economic Interest, percent	51%
Interest rate, fixed rate debt (as a percent)	5.75%
Total fixed rate debt	$ 510,000,000	0
Total floating rate debt	$ 0	510,000,000
Joint venture | 280 Park Avenue | Vornado Realty Trust
Debt Instrument [Line Items]
Economic Interest, percent	50%
Interest rate, fixed rate debt (as a percent)	5.81%
Total fixed rate debt	$ 1,200,000,000	0
Total floating rate debt	$ 0	1,200,000,000
Joint venture | 5 Times Square | RXR Realty led investment group
Debt Instrument [Line Items]
Economic Interest, percent	31.55%
Interest rate, fixed rate debt (as a percent)	7%
Interest rate, floating rate debt (as a percent)	5.77%
Total fixed rate debt	$ 400,000,000	0
Total floating rate debt	$ 495,924,000	0
Joint venture | 10 East 53rd Street | Canadian Pension Plan Investment Board
Debt Instrument [Line Items]
Economic Interest, percent	55%
Interest rate, fixed rate debt (as a percent)	5.35%
Total fixed rate debt	$ 220,000,000	0
Total floating rate debt	$ 0	220,000,000
Joint venture | 1515 Broadway | Allianz Real Estate of America
Debt Instrument [Line Items]
Economic Interest, percent	56.87%
Interest rate, fixed rate debt (as a percent)	3.93%
Total fixed rate debt	$ 782,321,000	801,845,000
Joint venture | 450 Park Avenue | Korean Institutional Investor / Israeli Institutional Investor
Debt Instrument [Line Items]
Economic Interest, percent	25.10%
Interest rate, fixed rate debt (as a percent)	6.10%
Total fixed rate debt	$ 267,000,000	0
Joint venture | 11 Madison Avenue | PGIM Real Estate
Debt Instrument [Line Items]
Economic Interest, percent	60%
Interest rate, fixed rate debt (as a percent)	3.84%
Total fixed rate debt	$ 1,400,000,000	1,400,000,000
Joint venture | One Madison Avenue | Private Investors
Debt Instrument [Line Items]
Total floating rate debt	$ 0	169,629,000
Joint venture | One Madison Avenue | National Pension Service of Korea / Hines Interest LP / International Investor
Debt Instrument [Line Items]
Economic Interest, percent	25.50%
Interest rate, fixed rate debt (as a percent)	3.94%
Total fixed rate debt	$ 467,008,000	0
Joint venture | 800 Third Avenue | Private Investors
Debt Instrument [Line Items]
Economic Interest, percent	60.52%
Interest rate, fixed rate debt (as a percent)	3.48%
Total fixed rate debt	$ 177,000,000	177,000,000
Joint venture | Worldwide Plaza | RXR Realty / New York REIT
Debt Instrument [Line Items]
Economic Interest, percent	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 | National Pension Service of Korea / Hines Interest LP
Debt Instrument [Line Items]
Economic Interest, percent	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 Portfolio
Debt Instrument [Line Items]
Total fixed rate debt	$ 0	195,493,000
Joint venture | Broadway 1552 to 1560 | Wharton Properties
Debt Instrument [Line Items]
Economic Interest, percent	50%
Interest rate, floating rate debt (as a percent)	2.65%
Total floating rate debt	$ 193,132,000	193,132,000
Joint venture | 121 Greene Street (5) | Wharton Properties
Debt Instrument [Line Items]
Economic Interest, percent	50%
Interest rate, floating rate debt (as a percent)	2.10%
Total floating rate debt	$ 12,550,000	13,228,000
Joint venture | 2 Herald Square | Israeli Institutional Investor
Debt Instrument [Line Items]
Economic Interest, percent	51%
Interest rate, floating rate debt (as a percent)	2.06%
Total floating rate debt	$ 182,500,000	200,989,000
Joint venture | 11 West 34th Street | Private Investor / Wharton Properties
Debt Instrument [Line Items]
Economic Interest, percent	30%
Interest rate, floating rate debt (as a percent)	1.45%
Total floating rate debt	$ 23,000,000	23,000,000
Joint venture | 115 Spring Street | Private Investors
Debt Instrument [Line Items]
Economic Interest, percent	51%
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 | Prudential Real Estate Investors
Debt Instrument [Line Items]
Economic Interest, percent	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 | A Fund Managed By Meritz Alternative Investment Management
Debt Instrument [Line Items]
Economic Interest, percent	20%
Interest rate, floating rate debt (as a percent)	1.50%
Total floating rate debt	$ 86,738,000	43,566,000
Joint venture | Mortgage loan | 717 Fifth Avenue | Wharton Properties / Private Investor
Debt Instrument [Line Items]
Interest rate, fixed rate debt (as a percent)	5.02%
Total fixed rate debt	$ 655,328,000	655,328,000
Joint venture | Mortgage loan | 650 Fifth Avenue | Wharton Properties
Debt Instrument [Line Items]
Interest rate, fixed rate debt (as a percent)	5.45%
Total fixed rate debt	$ 65,000,000	$ 0
Joint venture | Construction Loans | One Madison Avenue
Debt Instrument [Line Items]
Maximum facility capacity	$ 1,250,000,000
Term	5 years
Number of extension options | extension	1
Period of extension option	1 year
Joint venture | Construction Loans | Broadway 1552 to 1560
Debt Instrument [Line Items]
Period of extension option	1 month
Joint venture | Construction Loans | 15 Beekman
Debt Instrument [Line Items]
Maximum facility capacity	$ 125,000,000

Investments in Unconsolidated_6

Investments in Unconsolidated Joint Ventures - Schedules of Combined Financial Statements for the Unconsolidated Joint Ventures (Details) - USD ($) $ in Thousands		12 Months Ended
		Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Assets
Commercial real estate property, net		$ 7,159,245	$ 5,754,708
Cash and restricted cash		203,273	251,417	$ 266,059
Tenant and other receivables, related party receivables, and deferred rents receivable		34,497	47,616
Other assets		546,945	262,841
Total assets	[1]	12,355,794	11,066,629
Liabilities and equity
Mortgages and other loans payable, net		3,227,563	1,394,386
Lease liabilities		895,100	851,370
Other liabilities		236,211	195,390
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest		4,646,922	4,778,253	4,935,795	$ 5,517,198
Total liabilities and equity/capital		12,355,794	11,066,629
Company's investments in unconsolidated joint ventures		3,190,137	2,997,934
Investments difference between carrying amount and underlying equity		547,600
Combined statements of income for the unconsolidated joint ventures
Total revenues		826,739	843,991	1,052,744
Real estate taxes		138,228	152,835	176,315
Interest expense before capitalized interest		166,493	145,197	185,934
Amortization of deferred financing costs		7,817	11,424	11,794
Depreciation and amortization		215,306	216,869	313,668
Total expenses		746,037	747,342	958,326
Net (loss) income		(76,303)	480,632	414,758
Company's equity in net (loss) income from unconsolidated joint ventures		(57,958)	(55,402)	(25,195)
Joint venture
Assets
Commercial real estate property, net		15,989,642	14,763,874
Cash and restricted cash		709,299	768,510
Tenant and other receivables, related party receivables, and deferred rents receivable		601,552	533,455
Other assets		2,551,426	1,776,030
Total assets		19,851,919	17,841,869
Liabilities and equity
Mortgages and other loans payable, net		12,348,954	11,085,876
Deferred revenue		1,077,901	1,158,242
Lease liabilities		1,000,356	980,595
Other liabilities		456,537	352,499
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest		4,968,171	4,264,657
Total liabilities and equity/capital		19,851,919	17,841,869
Company's investments in unconsolidated joint ventures		3,190,137
Combined statements of income for the unconsolidated joint ventures
Total revenues		1,339,364	1,228,364	1,133,217
Operating expenses		240,002	203,332	180,201
Real estate taxes		252,806	225,104	220,633
Operating lease, rent		26,152	22,576	24,134
Interest expense before capitalized interest		431,865	342,910	325,500
Amortization of deferred financing costs		27,754	31,423	20,427
Depreciation and amortization		465,100	484,130	407,834
Total expenses		1,443,679	1,309,475	1,178,729
Loss on early extinguishment of debt		(467)	(2,017)	(194)
Net (loss) income		(104,782)	(83,128)	(45,706)
Company's equity in net (loss) income from unconsolidated joint ventures		(57,958)	(55,402)	(25,195)
Management Service, Base | Joint venture
Investment in Unconsolidated Joint Ventures
Management fees, base revenue		$ 24,000	$ 19,600	$ 15,800
[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: $41.2 million and $193.4 million of land, $41.0 million and $336.9 million of building and improvements, $— million and $— million of building and leasehold improvements, $— million and $15.4 million of right of use assets, $4.4 million and $11.7 million of accumulated depreciation, $599.2 million and $574.4 million of other assets included in other line items, $49.8 million and $418.9 million of real estate debt, net, $0.2 million and $0.8 million of accrued interest payable, $— million and $15.3 million of lease liabilities, and $146.4 million and $145.2 million of other liabilities included in other line items as of December 31, 2022 and December 31, 2021, respectively.

Deferred Costs (Details)

Deferred Costs (Details) - USD ($) $ in Thousands	Dec. 31, 2022	Dec. 31, 2021
Deferred Costs, Capitalized, Prepaid, and Other Assets Disclosure [Abstract]
Deferred leasing costs	$ 407,188	$ 400,419
Less: accumulated amortization	(286,031)	(275,924)
Deferred costs, net	$ 121,157	$ 124,495

Mortgages and Other Loans Pay_3

Mortgages and Other Loans Payable (Details)	12 Months Ended
	Dec. 31, 2022 USD ($) extension	Dec. 31, 2021 USD ($)	Apr. 30, 2018 USD ($)	Mar. 31, 2018 USD ($)
Debt Instrument [Line Items]
Total fixed rate debt	$ 3,165,814,000	$ 1,073,409,000
Total floating rate debt	70,148,000	361,051,000
Total fixed rate and floating rate debt	3,235,962,000	1,434,460,000
Mortgages reclassed to liabilities related to assets held for sale	0	(34,537,000)
Total mortgages and other loans payable	3,235,962,000	1,399,923,000
Deferred financing costs, net of amortization	(8,399,000)	(5,537,000)
Total mortgages and other loans payable	3,227,563,000	1,394,386,000
Book value of collateral	3,800,000,000	2,100,000,000
719 Seventh Avenue
Debt Instrument [Line Items]
Total fixed rate debt	50,000,000	0
Total floating rate debt	0	50,000,000
7 Dey/185 Broadway
Debt Instrument [Line Items]
Total fixed rate debt	200,000,000	0
Total floating rate debt	10,148,000	198,169,000
420 Lexington Avenue
Debt Instrument [Line Items]
Total fixed rate debt	283,064,000	288,660,000
100 Church Street
Debt Instrument [Line Items]
Total fixed rate debt	370,000,000	200,212,000
Landmark Square
Debt Instrument [Line Items]
Total fixed rate debt	100,000,000	100,000,000
485 Lexington Avenue
Debt Instrument [Line Items]
Total fixed rate debt	450,000,000	450,000,000
245 Park Avenue
Debt Instrument [Line Items]
Total fixed rate debt	1,712,750,000	0
1080 Amsterdam Avenue
Debt Instrument [Line Items]
Total fixed rate debt	0	34,537,000
690 Madison Avenue
Debt Instrument [Line Items]
Total floating rate debt	60,000,000	60,000,000
609 Fifth Avenue
Debt Instrument [Line Items]
Total floating rate debt	$ 0	$ 52,882,000
Weighted Average | 719 Seventh Avenue
Debt Instrument [Line Items]
Interest rate, fixed rate debt (as a percent)	4.70%
Weighted Average | 7 Dey/185 Broadway
Debt Instrument [Line Items]
Interest rate, fixed rate debt (as a percent)	7.59%
Interest rate, floating rate debt (as a percent)	2.85%
Weighted Average | 420 Lexington Avenue
Debt Instrument [Line Items]
Interest rate, fixed rate debt (as a percent)	3.99%
Weighted Average | 100 Church Street
Debt Instrument [Line Items]
Interest rate, fixed rate debt (as a percent)	5.89%
Weighted Average | Landmark Square
Debt Instrument [Line Items]
Interest rate, fixed rate debt (as a percent)	4.90%
Weighted Average | 485 Lexington Avenue
Debt Instrument [Line Items]
Interest rate, fixed rate debt (as a percent)	4.25%
Weighted Average | 245 Park Avenue
Debt Instrument [Line Items]
Interest rate, fixed rate debt (as a percent)	4.22%
Weighted Average | 690 Madison Avenue
Debt Instrument [Line Items]
Interest rate, floating rate debt (as a percent)	1.50%
2017 Master Repurchase Agreement 2017
Debt Instrument [Line Items]
Maximum facility capacity			$ 400,000,000	$ 300,000,000
Construction Loans | 185 Broadway
Debt Instrument [Line Items]
Maximum facility capacity	$ 225,000,000
Term	3 years
Number of extension options | extension	2
Period of extension option	1 year

Corporate Indebtedness - Additi

Corporate Indebtedness - Additional Information (Details)	12 Months Ended
	Dec. 31, 2022 USD ($) extension	Dec. 31, 2021 USD ($)
Corporate Indebtedness
Outstanding under line of credit facility	$ 443,217,000	$ 381,334,000
Long-term debt	3,227,563,000	1,394,386,000
2012 Credit Facility
Corporate Indebtedness
Credit facility, maximum borrowing capacity	1,250,000,000
Letters of credit	2,000,000
Ability to borrow under line of credit facility	$ 800,000,000
Revolving credit facility
Corporate Indebtedness
Facility fee (as a percent)	0.25%
Outstanding under line of credit facility	$ 450,000,000
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%
Line of Credit | Term loan
Corporate Indebtedness
Long-term debt	$ 1,200,000,000	1,200,000,000
Line of Credit | 2012 Credit Facility
Corporate Indebtedness
Long-term debt	443,200,000	$ 381,300,000
Term loan | Term Loan A, Maturity March 31, 2023
Corporate Indebtedness
Credit facility, maximum borrowing capacity	$ 1,050,000,000
Term loan | Term Loan A, Maturity March 31, 2023 | Secured Overnight Financing Rate (SOFR)
Corporate Indebtedness
Interest rate added to base rate (as a percent)	1.20%
Term loan | Term Loan A, Maturity March 31, 2023 | Secured Overnight Financing Rate (SOFR) | Minimum
Corporate Indebtedness
Interest rate added to base rate (as a percent)	0.80%
Term loan | Term Loan A, Maturity March 31, 2023 | Secured Overnight Financing Rate (SOFR) | Maximum
Corporate Indebtedness
Interest rate added to base rate (as a percent)	1.60%
Term loan | Term Loan B, Maturity November 21, 2024
Corporate Indebtedness
Credit facility, maximum borrowing capacity	$ 200,000,000
Term loan | Term Loan B, Maturity November 21, 2024 | Secured Overnight Financing Rate (SOFR)
Corporate Indebtedness
Interest rate added to base rate (as a percent)	1.25%
Term loan | Term Loan B, Maturity November 21, 2024 | Secured Overnight Financing Rate (SOFR) | Minimum
Corporate Indebtedness
Interest rate added to base rate (as a percent)	0.85%
Term loan | Term Loan B, Maturity November 21, 2024 | Secured Overnight Financing Rate (SOFR) | Maximum
Corporate Indebtedness
Interest rate added to base rate (as a percent)	1.65%
Revolving credit facility | Line of Credit | Secured Overnight Financing Rate (SOFR)
Corporate Indebtedness
Interest rate added to base rate (as a percent)	0.10%
Revolving credit facility | Line of Credit | Revolving Credit Facility, Maturity March 31, 2022
Corporate Indebtedness
Credit facility, maximum borrowing 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 | Line of Credit | Revolving Credit Facility, Maturity March 31, 2022 | Secured Overnight Financing Rate (SOFR)
Corporate Indebtedness
Interest rate added to base rate (as a percent)	1.05%
Revolving credit facility | Line of Credit | Revolving Credit Facility, Maturity March 31, 2022 | Secured Overnight Financing Rate (SOFR) | Minimum
Corporate Indebtedness
Interest rate added to base rate (as a percent)	0.725%
Revolving credit facility | Line of Credit | Revolving Credit Facility, Maturity March 31, 2022 | Secured Overnight Financing Rate (SOFR) | Maximum
Corporate Indebtedness
Interest rate added to base rate (as a percent)	1.40%

Corporate Indebtedness - Senior

Corporate Indebtedness - Senior Unsecured Notes (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021
Debt disclosures by scheduled maturity date
Deferred financing costs, net	$ (8,399)	$ (5,537)
Senior notes, net of deferred finance costs	99,692	899,308
Senior unsecured notes
Debt disclosures by scheduled maturity date
Unpaid Principal Balance	100,000
Accreted Balance	100,000	900,915
Deferred financing costs, net	(308)	(1,607)
Senior notes, net of deferred finance costs	99,692	899,308
Senior unsecured notes | 3.25% Senior unsecured notes maturing October 2022
Debt disclosures by scheduled maturity date
Unpaid Principal Balance	0
Accreted Balance	$ 0	499,913
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	$ 0
Accreted Balance	$ 0	301,002
Coupon Rate (as a percent)	4.50%
Initial Term (in Years)	10 years
Senior unsecured notes | 4.27% Senior unsecured notes maturing on December 17, 2025
Debt disclosures by scheduled maturity date
Unpaid Principal Balance	$ 100,000
Accreted Balance	$ 100,000	$ 100,000
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	12 Months Ended
	Jun. 30, 2005 USD ($)	Dec. 31, 2022 USD ($) quarter
Principal Repayments and Joint Venture Debt
2023		$ 265,975,000
2024		937,237,000
2025		470,000,000
2026		0
2027		3,712,750,000
Thereafter		150,000,000
Repayments of principal		$ 5,535,962,000
Trust Preferred Securities
Debt Instrument [Line Items]
Proceeds from issuance of debt	$ 100,000,000
Trust Preferred Securities | LIBOR
Debt Instrument [Line Items]
Interest rate added to base rate (as a percent)		125%
Interest payment deferment, number of consecutive quarters | quarter		8
Joint venture
Principal Repayments and Joint Venture Debt
2023		$ 1,155,465,000
2024		894,655,000
2025		1,466,750,000
2026		226,224,000
2027		299,417,000
Thereafter		2,130,404,000
Repayments of principal		6,172,915,000
Joint venture | Mortgages and other loans payable
Scheduled Amortization
2023		5,827,000
2024		4,488,000
2025		0
2026		0
2027		0
Thereafter		0
Future Amortization of Debt		10,315,000
Principal Repayments and Joint Venture Debt
2023		260,148,000
2024		332,749,000
2025		370,000,000
2026		0
2027		2,262,750,000
Thereafter		0
Repayments of principal		3,225,647,000
Joint venture | Revolving Credit Facility
Principal Repayments and Joint Venture Debt
2023		0
2024		0
2025		0
2026		0
2027		450,000,000
Thereafter		0
Repayments of principal		450,000,000
Joint venture | Unsecured Term Loans
Principal Repayments and Joint Venture Debt
2023		0
2024		600,000,000
2025		0
2026		0
2027		1,000,000,000
Thereafter		50,000,000
Repayments of principal		1,650,000,000
Joint venture | Trust Preferred Securities
Principal Repayments and Joint Venture Debt
2023		0
2024		0
2025		0
2026		0
2027		0
Thereafter		100,000,000
Repayments of principal		100,000,000
Joint venture | Senior Unsecured Notes
Principal Repayments and Joint Venture Debt
2023		0
2024		0
2025		100,000,000
2026		0
2027		0
Thereafter		0
Repayments of principal		$ 100,000,000

Corporate Indebtedness - Schedu

Corporate Indebtedness - Schedule of Consolidated Interest Expense, Excluding Capitalized Interest (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Interest expense
Interest expense before capitalized interest	$ 166,493	$ 145,197	$ 185,934
Interest on financing leases	4,555	5,448	8,091
Interest capitalized	(82,444)	(78,365)	(75,167)
Amortization of discount on assumed debt	1,855	0	0
Interest income	(986)	(1,389)	(2,179)
Interest expense, net	$ 89,473	$ 70,891	$ 116,679

Corporate Indebtedness - 2022 T

Corporate Indebtedness - 2022 Term Loan (Details)	1 Months Ended	12 Months Ended
	Oct. 31, 2022 USD ($) extenstion_option	Dec. 31, 2022 USD ($)	Jan. 31, 2023 USD ($)	Dec. 31, 2021 USD ($)
Debt Instrument [Line Items]
Long-term debt		$ 3,227,563,000		$ 1,394,386,000
Line of Credit | Term Loan 2022 | Line of Credit
Debt Instrument [Line Items]
Debt instrument, face amount		400,000,000
Number of extension options | extenstion_option	1
Period of extension option	6 months
Debt instrument, face amount, higher borrowing capacity option	$ 500,000,000
Long-term debt		$ 398,200,000
Line of Credit | Term Loan 2022 | Secured Overnight Financing Rate (SOFR) | Line of Credit
Debt Instrument [Line Items]
Interest rate added to base rate (as a percent)		1,000%
Debt instrument, interest rate, effective percentage		1.40%
Line of Credit | Term Loan 2022 | Secured Overnight Financing Rate (SOFR) | Minimum | Line of Credit
Debt Instrument [Line Items]
Interest rate added to base rate (as a percent)		1%
Line of Credit | Term Loan 2022 | Secured Overnight Financing Rate (SOFR) | Maximum | Line of Credit
Debt Instrument [Line Items]
Interest rate added to base rate (as a percent)		1.80%
Line of Credit | Term Loan 2022 | Subsequent Event | Line of Credit
Debt Instrument [Line Items]
Debt instrument, face amount			$ 425,000,000
Debt instrument, face amount, increase limit			$ 25,000,000

Related Party Transactions (Det

Related Party Transactions (Details) - USD ($)	1 Months Ended	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2017
Related Party Transaction [Line Items]
Payments made for services		$ 5,701,000	$ 12,377,000	$ 12,643,000
Operating lease rent		26,943,000	26,554,000	29,043,000
Total rental revenue		671,500,000	678,176,000	804,423,000
Amounts due from/to related parties
Due from joint ventures		26,812,000	28,204,000
Other		540,000	1,204,000
Related party receivables		27,352,000	29,408,000
One Vanderbilt Avenue
Related Party Transaction [Line Items]
Operating lease rent		3,000,000	2,400,000
SUMMIT One Vanderbilt
Related Party Transaction [Line Items]
Operating lease rent		33,000,000	5,000,000
Total rental revenue		22,800,000
Percentage rent			0
Alliance Building Services
Related Party Transaction [Line Items]
Profit participation from related party		1,400,000	1,700,000	1,400,000
Alliance Building Services | Affiliated Entity
Related Party Transaction [Line Items]
Payments made for services		8,600,000	14,000,000	13,300,000
Stephen L Green Interest | Affiliated Entity
Related Party Transaction [Line Items]
Property management fees from related party		$ 600,000	$ 700,000	$ 600,000
Marc Holliday, Chairman And CEO | One Vanderbilt Avenue | Affiliated Entity
Related Party Transaction [Line Items]
Due from (to) related party					$ 1,400,000
Marc Holliday, Chairman And CEO | One Vanderbilt Avenue | Minimum | Affiliated Entity
Related Party Transaction [Line Items]
Percentage of profits due to investors	1.50%
Marc Holliday, Chairman And CEO | One Vanderbilt Avenue | Maximum | Affiliated Entity
Related Party Transaction [Line Items]
Percentage of profits due to investors	1.80%
Andrew Mathias, President | One Vanderbilt Avenue | Affiliated Entity
Related Party Transaction [Line Items]
Due from (to) related party					$ 1,000,000
Andrew Mathias, President | One Vanderbilt Avenue | Minimum | Affiliated Entity
Related Party Transaction [Line Items]
Percentage of profits due to investors	1%
Andrew Mathias, President | One Vanderbilt Avenue | Maximum | Affiliated Entity
Related Party Transaction [Line Items]
Percentage of profits due to investors	1.20%
Holiday And Mathias | One Vanderbilt Avenue | Affiliated Entity
Related Party Transaction [Line Items]
Stabilization of property, within three years after stabilization, percent		50%
Stabilization period		3 years
Stabilization of property, three years or more after stabilization, percent		100%
Stabilization of property, anniversary period		7 years
Holiday | Affiliated Entity | One Vanderbilt Avenue | Property Interest Liquidation
Related Party Transaction [Line Items]
Liquidation values		$ 17,900,000
Mathias | Affiliated Entity | One Vanderbilt Avenue | Property Interest Liquidation
Related Party Transaction [Line Items]
Liquidation values		$ 11,900,000

Noncontrolling Interests on t_3

Noncontrolling Interests on the Company's Consolidated Financial Statements - Additional Information (Details) - USD ($) $ / shares in Units, $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Rollforward analysis of the activity relating to the noncontrolling interests in the operating partnership
Distributions	$ (4,699)	$ (6,631)	$ (78,855)
Acquisition of subsidiary interest from noncontrolling interest	(29,817)		(1,536)
Net (loss) income	(5,794)	25,457	20,016
Accumulated other comprehensive income allocation	$ 5,827	1,042	(2,299)
Series B Preferred Stock
Rollforward analysis of the activity relating to the noncontrolling interests in the operating partnership
Preferred units, issued (in shares)	0
SL Green Operating Partnership
Rollforward analysis of the activity relating to the noncontrolling interests in the operating partnership
Balance at beginning of period	$ 344,252	358,262
Distributions	(16,272)	(15,749)
Issuance of common units	22,855	18,678
Acquisition of subsidiary interest from noncontrolling interest	(40,901)	(53,289)
Net (loss) income	(5,794)	25,457
Accumulated other comprehensive income allocation	5,827	1,042
Fair value adjustment	(39,974)	9,851
Balance at end of period	$ 269,993	$ 344,252	358,262
SL Green Operating Partnership
Organization
Number of units of operating partnership owned by the noncontrolling interest unit holders (shares)	3,670,343	3,781,565
Shares of common stock reserved for issuance upon redemption of units of limited partnership interest in operating partnership (shares)	3,670,343
Rollforward analysis of the activity relating to the noncontrolling interests in the operating partnership
Distributions	$ (4,699)	$ (6,631)	(78,855)
Acquisition of subsidiary interest from noncontrolling interest	(29,817)		(1,536)
Accumulated other comprehensive income allocation	$ 5,827	$ 1,042	$ (2,299)
SL Green Operating Partnership | Operating Partnership
Organization
Noncontrolling interest in the operating partnership (as a percent)	5.39%	5.57%
SL Green Operating Partnership | Series A Preferred Units
Rollforward analysis of the activity relating to the noncontrolling interests in the operating partnership
Stated Distribution Rate	3.50%
Preferred Units, shares authorized (in shares)	109,161
Number of preferred units issued (in shares)	109,161
Number of Units Outstanding (in shares)	109,161
Annual dividends on preferred units (in dollars per share)	$ 35
Liquidation preference of preferred units (in dollars per share)	1,000
Conversion Price Per Unit (in dollars per share)	$ 0
Number of company common stock issued on conversion of Series B preferred units	6.71348
SL Green Operating Partnership | Series F Preferred Units
Rollforward analysis of the activity relating to the noncontrolling interests in the operating partnership
Stated Distribution Rate	7%
Preferred Units, shares authorized (in shares)	60
Number of preferred units issued (in shares)	60
Number of Units Outstanding (in shares)	60
Annual dividends on preferred units (in dollars per share)	$ 70
Liquidation preference of preferred units (in dollars per share)	1,000
Conversion Price Per Unit (in dollars per share)	$ 29.12
SL Green Operating Partnership | Series K Preferred Units
Rollforward analysis of the activity relating to the noncontrolling interests in the operating partnership
Stated Distribution Rate	3.50%
Preferred Units, shares authorized (in shares)	700,000
Number of preferred units issued (in shares)	563,954
Number of Units Outstanding (in shares)	341,677
Annual dividends on preferred units (in dollars per share)	$ 0.8750
Liquidation preference of preferred units (in dollars per share)	25
Conversion Price Per Unit (in dollars per share)	$ 134.67
SL Green Operating Partnership | Series L Preferred Units
Rollforward analysis of the activity relating to the noncontrolling interests in the operating partnership
Stated Distribution Rate	4%
Preferred Units, shares authorized (in shares)	500,000
Number of preferred units issued (in shares)	378,634
Number of Units Outstanding (in shares)	372,634
Annual dividends on preferred units (in dollars per share)	$ 1
Liquidation preference of preferred units (in dollars per share)	25
Conversion Price Per Unit (in dollars per share)	$ 0
SL Green Operating Partnership | Series P Preferred Units
Rollforward analysis of the activity relating to the noncontrolling interests in the operating partnership
Stated Distribution Rate	4%
Preferred Units, shares authorized (in shares)	200,000
Number of preferred units issued (in shares)	200,000
Number of Units Outstanding (in shares)	200,000
Annual dividends on preferred units (in dollars per share)	$ 1
Liquidation preference of preferred units (in dollars per share)	25
Conversion Price Per Unit (in dollars per share)	$ 0
SL Green Operating Partnership | Series Q Preferred Units
Rollforward analysis of the activity relating to the noncontrolling interests in the operating partnership
Stated Distribution Rate	3.50%
Preferred Units, shares authorized (in shares)	268,000
Number of preferred units issued (in shares)	268,000
Number of Units Outstanding (in shares)	268,000
Annual dividends on preferred units (in dollars per share)	$ 0.8750
Liquidation preference of preferred units (in dollars per share)	25
Conversion Price Per Unit (in dollars per share)	$ 148.95
SL Green Operating Partnership | Series R Preferred Units
Rollforward analysis of the activity relating to the noncontrolling interests in the operating partnership
Stated Distribution Rate	3.50%
Preferred Units, shares authorized (in shares)	400,000
Number of preferred units issued (in shares)	400,000
Number of Units Outstanding (in shares)	400,000
Annual dividends on preferred units (in dollars per share)	$ 0.8750
Liquidation preference of preferred units (in dollars per share)	25
Conversion Price Per Unit (in dollars per share)	$ 154.89
SL Green Operating Partnership | Series S Preferred Units
Rollforward analysis of the activity relating to the noncontrolling interests in the operating partnership
Stated Distribution Rate	4%
Preferred Units, shares authorized (in shares)	1,077,280
Number of preferred units issued (in shares)	1,077,280
Number of Units Outstanding (in shares)	1,077,280
Annual dividends on preferred units (in dollars per share)	$ 1
Liquidation preference of preferred units (in dollars per share)	25
Conversion Price Per Unit (in dollars per share)	$ 0
SL Green Operating Partnership | Series V Preferred Stock
Rollforward analysis of the activity relating to the noncontrolling interests in the operating partnership
Stated Distribution Rate	3.50%
Preferred Units, shares authorized (in shares)	40,000
Number of preferred units issued (in shares)	40,000
Number of Units Outstanding (in shares)	40,000
Annual dividends on preferred units (in dollars per share)	$ 0.8750
Liquidation preference of preferred units (in dollars per share)	25
Conversion Price Per Unit (in dollars per share)	$ 0
SL Green Operating Partnership | Series W
Rollforward analysis of the activity relating to the noncontrolling interests in the operating partnership
Preferred Units, shares authorized (in shares)	1
Number of preferred units issued (in shares)	1
Number of Units Outstanding (in shares)	1
Preferred stock, dividend, multiplier per common unit distribution	1,350

Noncontrolling Interests on t_4

Noncontrolling Interests on the Company's Consolidated Financial Statements - Preferred Unit Activity (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Rollforward Analysis of Preferred Unit Activity
Redemption of preferred units	$ (29,817)		$ (1,536)
SL Green Operating Partnership
Rollforward Analysis of Preferred Unit Activity
Redemption of preferred units	(29,817)		(1,536)
SL Green Operating Partnership | Preferred Units
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	(6,198)	(6,760)
Accrued dividends on preferred units	6,033	6,706
Balance at end of period	$ 177,943	$ 196,075	$ 202,169

Stockholders' Equity of the C_3

Stockholders' Equity of the Company - Additional Information (Details) - $ / shares	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Class of Stock [Line Items]
Authorized capital stock (in shares)	260,000,000
Authorized shares, par value (in dollars per share)	$ 0.01
Common stock, shares authorized (in shares)	160,000,000	160,000,000
Common stock, par value (in dollars per share)	$ 0.01	$ 0.01
Excess stock, shares authorized (shares)	75,000,000
Excess stock, par value (in dollars per share)	$ 0.01
Preferred stock, shares authorized (shares)	25,000,000
Preferred stock, par (in dollars per share)	$ 0.01
Excess shares issued (shares)	0
Common Stock
Class of Stock [Line Items]
Shares, outstanding (in shares)	64,380,000	64,105,000	66,474,000	74,672,000
Common Stock | SL Green Operating Partnership
Class of Stock [Line Items]
Shares, outstanding (in shares)	64,380,082

Stockholders' Equity of the C_4

Stockholders' Equity of the Company - Stock Repurchase Program (Details)	12 Months Ended
	Dec. 31, 2022 USD ($) increase $ / shares shares	Dec. 31, 2021 $ / shares shares	Dec. 31, 2020 USD ($) $ / shares shares	Dec. 31, 2019 USD ($) $ / shares shares	Dec. 31, 2018 USD ($) $ / shares shares	Dec. 31, 2017 USD ($) $ / shares shares	Jun. 30, 2018 USD ($)	Aug. 31, 2016 USD ($)
Class of Stock [Line Items]
Number of shares purchased (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	$ 500,000,000	$ 1,000,000,000
Number of increases to share repurchase program | increase	5
Stock repurchase program, authorized amount, total | $	$ 3,500,000,000
Number of shares purchased (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 - At-the-Market Equity Offering Program and Perpetual Preferred Stock (Details) - Series I Preferred Stock - USD ($) $ / shares in Units, $ in Millions	1 Months Ended	12 Months Ended
	Aug. 31, 2012	Dec. 31, 2022	Dec. 31, 2021
Stockholders' Equity
Preferred stock, shares outstanding (in shares)	9,200,000	9,200,000	9,200,000
Dividend rate preferred units (as a percent)	6.50%	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

Stockholders' Equity of the C_6

Stockholders' Equity of the Company - Schedule of Common Stock Issued and Proceeds Received Dividend Reinvestments (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020	Feb. 28, 2021
Stockholders' Equity
Common stock, shares authorized (in shares)	160,000,000	160,000,000
Dividend Reinvestment and Stock Purchase Plan (DRIP)
Stockholders' Equity
Common stock, shares authorized (in shares)				3,500,000
Issuance of common stock (in shares)	10,839	10,387	16,181
Dividend reinvestments/stock purchases under the DRSPP	$ 525	$ 738	$ 1,006

Stockholders' Equity of the C_7

Stockholders' Equity of the Company - Earnings per Share (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Basic Earnings:
(Loss) income attributable to SL Green common stockholders	$ (93,024)	$ 434,804	$ 356,105
Less: distributed earnings allocated to participating securities	(2,219)	(2,398)	(1,685)
Less: undistributed earnings allocated to participating securities	0	(192)	(137)
Net (loss) income attributable to SL Green common stockholders (numerator for basic earnings per share)	(95,243)	432,214	354,283
Effect of Dilutive Securities:
Add back: dilutive effect of earnings allocated to participating securities and contingently issuable shares	0	2,039	1,685
Add back: undistributed earnings allocated to participating securities	0	192	137
Add back: Effect of dilutive securities (redemption of units to common shares)	(5,794)	25,457	20,016
Diluted Earnings:
(Loss) income attributable to SL Green common stockholders (numerator for diluted earnings per share)	$ (101,037)	$ 459,902	$ 376,121
Basic Shares:
Weighted average common stock outstanding (in shares)	63,917,000	65,740,000	70,397,000
Effect of Dilutive Securities:
Operating Partnership units redeemable for common shares (in shares)	4,012,000	3,987,000	4,096,000
Stock-based compensation plans (in shares)	0	705,000	441,000
Contingently issuable shares from special dividend declared December 4, 2020 (in shares)	0	337,000	144,000
Diluted weighted average common stock outstanding (in shares)	67,929,000	70,769,000	75,078,000
Common stock shares excluded from the diluted shares outstanding (in shares)	1,682,236	948,017	1,676,825

Partners' Capital of the Oper_3

Partners' Capital of the Operating Partnership - Additional Information (Details) - shares	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Common Stock
Stockholders' Equity
Units, outstanding (in units)	64,380,000	64,105,000	66,474,000	74,672,000
SL Green Operating Partnership
Stockholders' Equity
Number of units of operating partnership owned by the noncontrolling interest unit holders (units)	3,670,343	3,781,565
SL Green Operating Partnership | Series I Preferred Units
Stockholders' Equity
Units, outstanding (in units)	9,200,000
Common units redemption, period of restriction	1 year
Conversion of stock, shares issued (in shares)	1
SL Green Operating Partnership | Common Stock
Stockholders' Equity
Units, outstanding (in units)	64,380,082

Partners' Capital of the Oper_4

Partners' Capital of the Operating Partnership - EPS (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Numerator
Less: distributed earnings allocated to participating securities	$ (2,219)	$ (2,398)	$ (1,685)
Less: undistributed earnings allocated to participating securities	0	(192)	(137)
Net (loss) income attributable to SL Green common stockholders (numerator for basic earnings per share)	(95,243)	432,214	354,283
Add back: dilutive effect of earnings allocated to participating securities and contingently issuable shares	0	2,039	1,685
Add back: undistributed earnings allocated to participating securities	$ 0	$ (192)	$ (137)
Denominator
Weighted average common stock outstanding (in shares)	63,917,000	65,740,000	70,397,000
Diluted weighted average common stock outstanding (in shares)	67,929,000	70,769,000	75,078,000
Common stock shares excluded from the diluted shares outstanding (in shares)	1,682,236	948,017	1,676,825
SL Green Operating Partnership
Numerator
Net (loss) income attributable to SLGOP common unitholders	$ (98,818)	$ 460,261	$ 376,121
Net (loss) income attributable to SL Green common stockholders (numerator for basic earnings per share)	(101,037)	457,671	374,299
Add back: dilutive effect of earnings allocated to participating securities and contingently issuable shares	0	2,590	1,822
(Loss) income attributable to SLGOP common unitholders	$ (101,037)	$ 460,261	$ 376,121
Denominator
Weighted average common stock outstanding (in shares)	67,929,000	69,667,000	74,493,000
Stock-based compensation plans (in shares)	0	765,000	441,000
Contingently issuable units (in shares)	0	337,000	144,000
Diluted weighted average common stock outstanding (in shares)	67,929,000	70,769,000	75,078,000

Share-based Compensation - Addi

Share-based Compensation - Additional Information (Details)	12 Months Ended
	Dec. 31, 2022 USD ($) unit / shares fungibleUnit shares	Dec. 31, 2021 USD ($) shares	Dec. 31, 2020 USD ($) shares	Dec. 31, 2019 shares
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	$ 1,800,000	$ 2,100,000	$ 2,200,000
Stock options, stock appreciation rights and other awards
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Expected life of option (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
Expected life of option (in years)	10 years
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
Granted (in shares) | shares	0	0	0
Remaining weighted average contractual life of the options outstanding (in years)	1 year 10 months 24 days
Remaining weighted average contractual life of the options exercisable (in years)	1 year 10 months 24 days
Total unrecognized compensation cost related to unvested stock awards	$ 0
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%
Restricted Stock Awards
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Compensation expense	$ 10,133,905	$ 8,497,054	$ 10,895,459
Total unrecognized compensation cost related to unvested stock awards	$ 12,500,000
Weighted average period for recognition of compensation cost related to unvested stock awards (in years)	2 years
Annual award vesting rate, low end of range (as a percent)	15%
Annual award vesting rate, high end of range (as a percent)	35%
Fair value of restricted stock vested during the period	$ 9,700,000	11,300,000	12,500,000
Weighted average fair value of options granted during the period	$ 16,804,931	$ 9,214,531	$ 734,315
Awards granted (in shares) | shares	314,995	141,515	8,693
Awards outstanding (in shares) | shares	3,758,174	3,459,363	3,337,545	3,362,456
LTIP units
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Weighted average period for recognition of compensation cost related to unvested stock awards (in years)	1 year 7 months 6 days
Weighted average fair value of options granted during the period	$ 45,000,000	$ 55,000,000
Performance Shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Total unrecognized compensation cost related to unvested stock awards	45,700,000
Share-based compensation	$ 43,500,000	$ 41,900,000	$ 29,400,000
Employee Stock
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of shares available for issuance (shares) | shares	500,000
Duration of each offering period starting the first day of each calendar quarter (in months)	3 months
Shares of common stock available for issuance (shares)	85%
Shares of common stock issued (shares) | shares	191,845
Fourth Amended and Restated 2003 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) | fungibleUnit	32,210,000
Fungible units per share (in fungible units per share) | unit / shares	2.59
Shares that may be issued if equal to fungible units (shares) (less than) | shares	32,210,000
Number of fungible units available for grant | fungibleUnit	6,300,000
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	0.84
Third Amendment and Restated 2005 Stock Option and Incentive Plan | Employee Stock
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Compensation expense	$ 0
Deferred Stock Compensation Plan for Directors
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Compensation expense	$ 2,700,000
Maximum percentage of the annual retainer fee, chairman fees and meeting fees that may be deferred by non-employee directors (percent)	100%
Awards granted (in shares) | shares	27,436
Shares issued (in shares) | shares	9,571
Awards outstanding (in shares) | shares	192,638

Share-based Compensation - Acti

Share-based Compensation - Activity (Details) - USD ($)	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Stock options
Options Outstanding
Balance at beginning of year (in shares)	394,089	761,686	977,745
Granted (in shares)	0	0	0
Exercised (in shares)	0	(11,314)	0
Lapsed or cancelled (in shares)	(80,609)	(356,283)	(216,059)
Balance at end of period (in shares)	313,480	394,089	761,686
Options exercisable at end of period (in shares)	313,480	394,089	760,743
Weighted Average Exercise Price
Balance at beginning of year (in dollars per share)	$ 100.56	$ 105.76	$ 108.57
Exercised (in dollars per share)	0	72.30	0
Lapsed or cancelled (in dollars per share)	112.14	112.56	118.49
Balance at end of period (in dollars per share)	97.59	100.56	105.76
Options exercisable at end of period (in dollars per share)	$ 97.59	$ 100.56	$ 105.76
Restricted Stock Awards
Summary of restricted stock
Balance at beginning of year (in shares)	3,459,363	3,337,545	3,362,456
Granted (in shares)	314,995	141,515	8,693
Cancelled (in shares)	(16,184)	(19,697)	(33,604)
Balance at end of period (in shares)	3,758,174	3,459,363	3,337,545
Vested during the period (in shares)	118,255	122,759	125,064
Compensation expense recorded	$ 10,133,905	$ 8,497,054	$ 10,895,459

Accumulated Other Comprehensi_3

Accumulated Other Comprehensive Income (Loss) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Accumulated Other Comprehensive Income (Loss) of the Company [Roll Forward]
Beginning Balance	$ 4,778,253	$ 4,935,795	$ 5,517,198
Ending Balance	4,646,922	4,778,253	4,935,795
Deferred net losses from terminated hedges	500	600
Accumulated Other Comprehensive Income (Loss)
Accumulated Other Comprehensive Income (Loss) of the Company [Roll Forward]
Beginning Balance	(46,758)	(67,247)	(28,485)
Other comprehensive income (loss) before reclassifications	100,346	(3,011)	(57,361)
Amounts reclassified from accumulated other comprehensive income	(3,984)	23,500	18,599
Ending Balance	49,604	(46,758)	(67,247)
Net unrealized (loss) gain on derivative instruments
Accumulated Other Comprehensive Income (Loss) of the Company [Roll Forward]
Beginning Balance	(25,881)	(57,415)	(22,780)
Other comprehensive income (loss) before reclassifications	78,300	14,908	(48,532)
Amounts reclassified from accumulated other comprehensive income	(4,619)	16,626	13,897
Ending Balance	47,800	(25,881)	(57,415)
Net unrealized gain (loss) on marketable securities
Accumulated Other Comprehensive Income (Loss) of the Company [Roll Forward]
Beginning Balance	1,117	1,021	2,277
Other comprehensive income (loss) before reclassifications	(1,359)	96	(1,256)
Amounts reclassified from accumulated other comprehensive income	0	0	0
Ending Balance	(242)	1,117	1,021
Joint venture
Accumulated Other Comprehensive Income (Loss) of the Company [Roll Forward]
Beginning Balance	4,264,657
Ending Balance	4,968,171	4,264,657
Joint venture | Net unrealized (loss) gain on derivative instruments
Accumulated Other Comprehensive Income (Loss) of the Company [Roll Forward]
Beginning Balance	(21,994)	(10,853)	(7,982)
Other comprehensive income (loss) before reclassifications	23,405	(18,015)	(7,573)
Amounts reclassified from accumulated other comprehensive income	635	6,874	4,702
Ending Balance	$ 2,046	$ (21,994)	$ (10,853)

Fair Value Measurements (Detail

Fair Value Measurements (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020	Jul. 31, 2021
Fair Value of Financial Instruments
Marketable securities available-for-sale	$ 11,240	$ 24,146
Interest rate cap and swap agreements (included in Other assets)	57,660	1,896
Ownership percentage deconsolidated				51%
Investment fair value adjustment		206,800
Purchase price and other fair value adjustments	(8,118)	210,070	$ 187,522
Debt and preferred equity investments	623,280	1,088,723
220 East 42nd Street
Fair Value of Financial Instruments
Ownership interest disposed				49%
Carrying Value
Fair Value of Financial Instruments
Fixed rate debt	5,015,814	3,274,324
Variable rate debt	520,148	801,051
Total debt	5,535,962	4,075,375
Fair Value
Fair Value of Financial Instruments
Total debt	5,304,360	4,137,135
Estimated fair value of debt and preferred equity investments, low end of range	600,000	1,000,000
Estimated fair value of debt and preferred equity investments, high end of range	600,000	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)	57,660	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 | Carrying Value
Fair Value of Financial Instruments
Debt and preferred equity investments	623,280	1,088,723
Level 3 | Fair Value
Fair Value of Financial Instruments
Fixed rate debt	4,784,691	3,336,463
Variable rate debt	519,669	800,672
Equity marketable securities | Level 1
Fair Value of Financial Instruments
Marketable securities available-for-sale	0	0
Mortgage-backed securities
Fair Value of Financial Instruments
Marketable securities available-for-sale	11,240	24,146
Mortgage-backed securities | Level 2
Fair Value of Financial Instruments
Marketable securities available-for-sale	11,240	24,146
220 East 42nd Street
Fair Value of Financial Instruments
Ownership percentage deconsolidated				51%
Investment fair value adjustment		206,800
220 East 42nd Street | 220 East 42nd Street
Fair Value of Financial Instruments
Ownership interest disposed				49%
Accrued Interest Payable and Other
Fair Value of Financial Instruments
Interest rate cap and swap agreements (included in accrued interest payable and other liabilities)	10,142	29,912
Accrued Interest Payable and Other | Level 1
Fair Value of Financial Instruments
Interest rate cap and swap agreements (included in accrued interest payable and other liabilities)	0	0
Accrued Interest Payable and Other | Level 2
Fair Value of Financial Instruments
Interest rate cap and swap agreements (included in accrued interest payable and other liabilities)	10,142	29,912
Accrued Interest Payable and Other | Level 3
Fair Value of Financial Instruments
Interest rate cap and swap agreements (included in accrued interest payable and other liabilities)	$ 0	$ 0

Financial Instruments_ Deriva_3

Financial Instruments: Derivatives and Hedging (Details) - USD ($)	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Financial Instruments: Derivatives and Hedging
Fair Value	$ 57,660,000	$ 1,896,000
Gain (loss) from changes in fair value	1,700,000	0	$ 0
Fair value of derivatives in a net liability position	10,500,000
Aggregate termination value	10,900,000
Amount of Gain (Loss) Recognized in Other Comprehensive Income (Loss)	107,945,000	(3,757,000)	(59,221,000)
Amount of Gain (Loss) Reclassified from Accumulated Other Comprehensive Income (Loss) into Income	4,316,000	(25,184,000)	(19,480,000)
Interest Rate Contract
Financial Instruments: Derivatives and Hedging
Fair Value	47,518,000
Amount of Gain (Loss) Recognized in Other Comprehensive Income (Loss)	83,162,000	15,643,000	(51,244,000)
Amount of Gain (Loss) Reclassified from Accumulated Other Comprehensive Income (Loss) into Income	4,989,000	(17,602,000)	(14,569,000)
Interest Rate Swap Expiring January 2023
Financial Instruments: Derivatives and Hedging
Notional Value	$ 100,000,000
Strike Rate	0.212%
Fair Value	$ 333,000
Interest Rate Swap Expiring February 2023
Financial Instruments: Derivatives and Hedging
Notional Value	$ 400,000,000
Strike Rate	0.184%
Fair Value	$ 1,453,000
Interest Rate Swap Expiring February 2023 2
Financial Instruments: Derivatives and Hedging
Notional Value	$ 50,000,000
Strike Rate	0.633%
Fair Value	$ 158,000
Interest Rate Cap Expiring June 2023
Financial Instruments: Derivatives and Hedging
Notional Value	$ 370,000,000
Strike Rate	3.25%
Fair Value	$ 2,471,000
Interest Rate Cap Expiring June 2023 2
Financial Instruments: Derivatives and Hedging
Notional Value	$ 370,000,000
Strike Rate	3.25%
Fair Value	$ (2,465,000)
Interest Rate Swap Expiring in July 2023
Financial Instruments: Derivatives and Hedging
Notional Value	$ 100,000,000
Strike Rate	1.163%
Fair Value	$ 2,133,000
Interest Rate Swap Expiring in July 2023, 2
Financial Instruments: Derivatives and Hedging
Notional Value	$ 200,000,000
Strike Rate	1.133%
Fair Value	$ 4,300,000
Interest Rate Cap Expiring September 2023
Financial Instruments: Derivatives and Hedging
Notional Value	$ 600,000,000
Strike Rate	4.08%
Fair Value	$ (3,341,000)
Interest Rate Cap Expiring September 2023, 2
Financial Instruments: Derivatives and Hedging
Notional Value	$ 50,000,000
Strike Rate	3.50%
Fair Value	$ 505,000
Interest Rate Swap Expiring in November 2023
Financial Instruments: Derivatives and Hedging
Notional Value	$ 200,000,000
Strike Rate	4.739%
Fair Value	$ 104,000
Interest Rate Cap Expiring November 2023
Financial Instruments: Derivatives and Hedging
Notional Value	$ 196,717,000
Strike Rate	3.50%
Fair Value	$ 2,232,000
Interest Rate Cap Expiring November 2023, 2
Financial Instruments: Derivatives and Hedging
Notional Value	$ 196,717,000
Strike Rate	3.50%
Fair Value	$ (2,225,000)
Interest Rate Swap Expiring in January 2024
Financial Instruments: Derivatives and Hedging
Notional Value	$ 150,000,000
Strike Rate	2.70%
Fair Value	$ 3,249,000
Interest Rate Swap Expiring in January 2024, 2
Financial Instruments: Derivatives and Hedging
Notional Value	$ 200,000,000
Strike Rate	4.59%
Fair Value	$ 593,000
Interest Rate Swap Expiring in January 2024, 3
Financial Instruments: Derivatives and Hedging
Notional Value	$ 200,000,000
Strike Rate	4.511%
Fair Value	$ 750,000
Interest Rate Swap Expiring in January 2026
Financial Instruments: Derivatives and Hedging
Notional Value	$ 150,000,000
Strike Rate	2.721%
Fair Value	$ 5,848,000
Interest Rate Swap Expiring in January 2026, 2
Financial Instruments: Derivatives and Hedging
Notional Value	$ 200,000,000
Strike Rate	2.762%
Fair Value	$ 7,601,000
Interest Rate Swap Expiring in February 2027
Financial Instruments: Derivatives and Hedging
Notional Value	$ 100,000,000
Strike Rate	3.003%
Fair Value	$ 3,264,000
Interest Rate Swap Expiring in February 2027, 2
Financial Instruments: Derivatives and Hedging
Notional Value	$ 100,000,000
Strike Rate	2.833%
Fair Value	$ 3,888,000
Interest Rate Swap Expiring in February 2027, 3
Financial Instruments: Derivatives and Hedging
Notional Value	$ 50,000,000
Strike Rate	2.563%
Fair Value	$ 2,441,000
Interest Rate Swap Expiring in February 2027, 4
Financial Instruments: Derivatives and Hedging
Notional Value	$ 200,000,000
Strike Rate	2.691%
Fair Value	$ 8,823,000
Interest Rate Swap Expiring in May 2027
Financial Instruments: Derivatives and Hedging
Notional Value	$ 300,000,000
Strike Rate	2.966%
Fair Value	$ 7,514,000
Interest Rate Swap Expiring in June 2027
Financial Instruments: Derivatives and Hedging
Notional Value	$ 370,000,000
Strike Rate	3.888%
Fair Value	$ (1,900,000)
Interest Rate Swap Expiring in January 2028
Financial Instruments: Derivatives and Hedging
Notional Value	$ 100,000,000
Strike Rate	3.756%
Fair Value	$ (211,000)
Interest Expense
Financial Instruments: Derivatives and Hedging
Gain (loss) from changes in fair value	300,000	0	100,000
Estimated current balance held in accumulated other comprehensive loss to be reclassified into earnings within the next 12 months	(35,900,000)
Income Loss From Equity Method Investments
Financial Instruments: Derivatives and Hedging
Estimated current balance held in accumulated other comprehensive loss to be reclassified into earnings within the next 12 months	(11,600,000)
Joint venture
Financial Instruments: Derivatives and Hedging
Amount of Gain (Loss) Recognized in Other Comprehensive Income (Loss)	24,783,000	(19,400,000)	(7,977,000)
Amount of Gain (Loss) Reclassified from Accumulated Other Comprehensive Income (Loss) into Income	(673,000)	$ (7,582,000)	$ (4,911,000)
Joint venture | Interest Rate Contract
Financial Instruments: Derivatives and Hedging
Fair Value	74,040,000
Joint venture | Interest Rate Cap Expiring June 2023
Financial Instruments: Derivatives and Hedging
Notional Value	$ 510,000,000
Strike Rate	3%
Fair Value	$ 4,220,000
Joint venture | Interest Rate Cap Expiring September 2023
Financial Instruments: Derivatives and Hedging
Notional Value	$ 400,000,000
Strike Rate	3.50%
Fair Value	$ 3,839,000
Joint venture | Interest Rate Cap Expiring September 2023, 2
Financial Instruments: Derivatives and Hedging
Notional Value	$ 1,075,000,000
Strike Rate	4.08%
Fair Value	$ 6,004,000
Joint venture | Interest Rate Cap Expiring January 2023
Financial Instruments: Derivatives and Hedging
Notional Value	$ 23,000,000
Strike Rate	4.75%
Fair Value	$ 0
Joint venture | Interest Rate Cap Expiring February 2023
Financial Instruments: Derivatives and Hedging
Notional Value	$ 220,000,000
Strike Rate	4%
Fair Value	$ 93,000
Joint venture | Interest Rate Cap Expiring August 2023
Financial Instruments: Derivatives and Hedging
Notional Value	$ 267,000,000
Strike Rate	4%
Fair Value	$ 1,289,000
Joint venture | Interest Rate Cap Expiring September 2023, 3
Financial Instruments: Derivatives and Hedging
Notional Value	$ 125,000,000
Strike Rate	4.08%
Fair Value	$ 698,000
Joint venture | Interest Rate Cap Expiring May 2024
Financial Instruments: Derivatives and Hedging
Notional Value	$ 118,670,000
Strike Rate	0.49%
Fair Value	$ 22,669,000
Joint venture | Interest Rate Cap Expiring May 2024, 2
Financial Instruments: Derivatives and Hedging
Notional Value	$ 118,670,000
Strike Rate	0.49%
Fair Value	$ 22,652,000
Joint venture | Interest Rate Cap Expiring February 2026
Financial Instruments: Derivatives and Hedging
Notional Value	$ 177,000,000
Strike Rate	1.669%
Fair Value	$ 12,576,000

Lease Income - Future Minimum R

Lease Income - Future Minimum Rents (Details) $ in Thousands	Dec. 31, 2022 USD ($)
Leases [Abstract]
2023	$ 596,648
2024	569,125
2025	543,287
2026	486,771
2027	415,123
Thereafter	1,718,650
Total payments to be received	$ 4,329,604

Lease Income - Lease Income (De

Lease Income - Lease Income (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Leases [Abstract]
Fixed lease payments	$ 594,541	$ 600,474
Variable lease payments	82,676	73,542
Total lease payments(1)	677,217	674,016
Amortization of acquired above and below-market leases	(5,717)	4,160
Total rental revenue	671,500	678,176	$ 804,423
Sublease Income	222,100	229,200
Interest income	$ 4,389	$ 4,422

Lease Income - Sales Type Lease

Lease Income - Sales Type Lease (Details) $ in Thousands	12 Months Ended
	Dec. 31, 2022 USD ($)
Leases [Abstract]
Initial term of non cancellable operating leases, minimum (in years)	1 year
2023	$ 3,133
2024	3,180
2025	3,228
2026	3,276
2027	3,325
Thereafter	200,169
Total minimum lease payments	216,311
Amount representing interest	(111,988)
Investment in sales-type leases	$ 104,323

Benefit Plans (Details)

Benefit Plans (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Jun. 30, 2021	Dec. 31, 2020	Jun. 30, 2020
Multiemployer Plans [Line Items]
Plan contributions	$ 9,145	$ 9,176		$ 11,097
Employee contribution limit per calendar year	15%
Employer matching contribution, percent of match	100%	100%
Percentage of eligible compensation matched by employer	4%	4%
Matching contribution	$ 1,500	$ 1,500		1,700
Pension Plan
Multiemployer Plans [Line Items]
Multiemployer plans, surcharge	No
Plan contributions	$ 1,952	1,994	$ 290,100	2,480	$ 291,300
Multiemployer plans, contributions by employer, percent	5%
Health Plan
Multiemployer Plans [Line Items]
Plan contributions	$ 6,386	6,333	$ 1,500,000	7,688	$ 1,600,000
Multiemployer plans, contributions by employer, percent	5%
Other plans
Multiemployer Plans [Line Items]
Plan contributions	$ 807	$ 849		$ 929

Commitments and Contingencies_2

Commitments and Contingencies (Details) - USD ($)	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021
Other Commitments [Line Items]
Employment agreements with certain executives, minimum cash-based compensation for next fiscal year	$ 3,400,000
Initial term of non cancellable operating leases, minimum (in years)	1 year
Financing leases
2023	$ 3,133,000
2024	3,180,000
2025	3,228,000
2026	3,276,000
2027	3,325,000
Thereafter	200,169,000
Total minimum lease payments	216,311,000
Amount representing interest	(112,093,000)
Total lease liabilities excluding liabilities related to assets held for sale	104,218,000
Lease liabilities	104,218,000	$ 102,914,000
Non-cancellable operating leases
2023	52,220,000
2024	58,068,000
2025	58,207,000
2026	58,347,000
2027	58,358,000
Thereafter	1,334,570,000
Total minimum lease payments	1,619,770,000
Amount discounted using incremental borrowing rate	(724,670,000)
Total lease liabilities excluding liabilities related to assets held for sale	895,100,000
Lease liability - operating leases	895,100,000	851,370,000
Minimum sublease rentals to be received in the future	$ 4,329,604,000
711 Third Avenue
Other Commitments [Line Items]
Ownership interest	50%
Belmont
Other Commitments [Line Items]
Loss reserves	$ 3,100,000	2,900,000
Ticonderoga
Other Commitments [Line Items]
Loss reserves	$ 0	$ 0

Commitments and Contingencies -

Commitments and Contingencies - Lease Cost (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Operating Lease Costs
Operating lease costs before capitalized operating lease costs	$ 33,773	$ 30,270
Operating lease costs capitalized	(6,830)	(3,716)
Operating lease costs, net	26,943	26,554	$ 29,043
Finance Lease, Costs [Abstract]
Interest on financing leases	4,555	5,448	$ 8,091
Interest on financing leases capitalized	0	0
Interest on financing leases, net	4,555	5,448
Finance lease, right-of-use asset, amortization	22,112	660
Financing lease costs, net	$ 26,667	$ 6,108
Operating lease, weighted average discount rate, percent	4.51%
Operating lease, weighted average remaining lease term	28 years

Segment Information - Additiona

Segment Information - Additional Information (Details) $ in Thousands		12 Months Ended
		Dec. 31, 2022 USD ($) segment	Dec. 31, 2021 USD ($)	Dec. 31, 2020 USD ($)
Segment information
Number of reportable segments (segment) | segment		2
Total revenues		$ 826,739	$ 843,991	$ 1,052,744
Net (loss) income		(76,303)	480,632	414,758
Total assets	[1]	12,355,794	11,066,629
Marketing, general and administrative		93,798	94,912	91,826
Operating Segments | Real Estate Segment
Segment information
Total revenues		745,626	763,651	932,581
Net (loss) income		(132,283)	412,393	354,353
Total assets		11,727,418	9,974,140
Operating Segments | Debt and Preferred Equity Segment
Segment information
Total revenues		81,113	80,340	120,163
Net (loss) income		55,980	68,239	$ 60,405
Total assets		$ 628,376	$ 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: $41.2 million and $193.4 million of land, $41.0 million and $336.9 million of building and improvements, $— million and $— million of building and leasehold improvements, $— million and $15.4 million of right of use assets, $4.4 million and $11.7 million of accumulated depreciation, $599.2 million and $574.4 million of other assets included in other line items, $49.8 million and $418.9 million of real estate debt, net, $0.2 million and $0.8 million of accrued interest payable, $— million and $15.3 million of lease liabilities, and $146.4 million and $145.2 million of other liabilities included in other line items as of December 31, 2022 and December 31, 2021, respectively.

Schedule III - Real Estate an_2

Schedule III - Real Estate and Accumulated Depreciation (Details) $ in Thousands	Dec. 31, 2022 USD ($) ft²	Jun. 30, 2022 ft²	Dec. 31, 2021 USD ($)	Dec. 31, 2020 USD ($)	Dec. 31, 2019 USD ($)
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	$ 3,235,962
Initial Cost
Land	1,697,226
Building & Improvements	6,181,796
Cost Capitalized Subsequent To Acquisition
Land	(120,297)
Building & Improvements	1,440,076
Gross Amount at Which Carried at Close of Period
Land	1,576,927
Building & Improvements (3)	7,621,872
Total	9,198,799		$ 7,650,907	$ 7,355,079	$ 8,784,567
Accumulated Depreciation	$ 2,039,554		$ 1,896,199	$ 1,956,077	$ 2,060,560
Approximate Square Feet | ft²	29,716,041
885 Third Avenue - Office Condominium Units (3)
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	$ 0
Initial Cost
Land	138,444
Building & Improvements	244,040
Cost Capitalized Subsequent To Acquisition
Land	(138,444)
Building & Improvements	(136,174)
Gross Amount at Which Carried at Close of Period
Land	0
Building & Improvements (3)	107,866
Total	107,866
Accumulated Depreciation	$ 6,664
Approximate Square Feet | ft²	218,796
420 Lexington Avenue
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	$ 283,064
Initial Cost
Land	0
Building & Improvements	333,499
Cost Capitalized Subsequent To Acquisition
Land	0
Building & Improvements	225,456
Gross Amount at Which Carried at Close of Period
Land	0
Building & Improvements (3)	558,955
Total	558,955
Accumulated Depreciation	205,225
711 Third Avenue
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	0
Initial Cost
Land	19,844
Building & Improvements	115,769
Cost Capitalized Subsequent To Acquisition
Land	0
Building & Improvements	71,773
Gross Amount at Which Carried at Close of Period
Land	19,844
Building & Improvements (3)	187,542
Total	207,386
Accumulated Depreciation	81,265
555 West 57th Street
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	0
Initial Cost
Land	18,846
Building & Improvements	140,946
Cost Capitalized Subsequent To Acquisition
Land	0
Building & Improvements	4,499
Gross Amount at Which Carried at Close of Period
Land	18,846
Building & Improvements (3)	145,445
Total	164,291
Accumulated Depreciation	91,729
461 Fifth Avenue
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	0
Initial Cost
Land	0
Building & Improvements	88,276
Cost Capitalized Subsequent To Acquisition
Land	28,873
Building & Improvements	9,068
Gross Amount at Which Carried at Close of Period
Land	28,873
Building & Improvements (3)	97,344
Total	126,217
Accumulated Depreciation	41,304
750 Third Avenue
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	0
Initial Cost
Land	51,093
Building & Improvements	251,523
Cost Capitalized Subsequent To Acquisition
Land	0
Building & Improvements	52,043
Gross Amount at Which Carried at Close of Period
Land	51,093
Building & Improvements (3)	303,566
Total	354,659
Accumulated Depreciation	110,402
625 Madison Avenue
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	0
Initial Cost
Land	0
Building & Improvements	291,319
Cost Capitalized Subsequent To Acquisition
Land	0
Building & Improvements	146,707
Gross Amount at Which Carried at Close of Period
Land	0
Building & Improvements (3)	438,026
Total	438,026
Accumulated Depreciation	150,321
485 Lexington Avenue
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	450,000
Initial Cost
Land	78,282
Building & Improvements	452,631
Cost Capitalized Subsequent To Acquisition
Land	0
Building & Improvements	(20,977)
Gross Amount at Which Carried at Close of Period
Land	78,282
Building & Improvements (3)	431,654
Total	509,936
Accumulated Depreciation	189,131
810 Seventh Avenue
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	0
Initial Cost
Land	114,077
Building & Improvements	550,819
Cost Capitalized Subsequent To Acquisition
Land	0
Building & Improvements	5,483
Gross Amount at Which Carried at Close of Period
Land	114,077
Building & Improvements (3)	556,302
Total	670,379
Accumulated Depreciation	232,822
1185 Avenue of the Americas
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	0
Initial Cost
Land	0
Building & Improvements	791,106
Cost Capitalized Subsequent To Acquisition
Land	0
Building & Improvements	131,034
Gross Amount at Which Carried at Close of Period
Land	0
Building & Improvements (3)	922,140
Total	922,140
Accumulated Depreciation	375,907
1350 Avenue of the Americas
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	0
Initial Cost
Land	90,941
Building & Improvements	431,517
Cost Capitalized Subsequent To Acquisition
Land	0
Building & Improvements	8,487
Gross Amount at Which Carried at Close of Period
Land	90,941
Building & Improvements (3)	440,004
Total	530,945
Accumulated Depreciation	182,958
1-6 Landmark Square
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	100,000
Initial Cost
Land	27,852
Building & Improvements	161,343
Cost Capitalized Subsequent To Acquisition
Land	(6,939)
Building & Improvements	(27,266)
Gross Amount at Which Carried at Close of Period
Land	20,913
Building & Improvements (3)	134,077
Total	154,990
Accumulated Depreciation	41,964
7 Landmark Square
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	0
Initial Cost
Land	1,721
Building & Improvements	8,417
Cost Capitalized Subsequent To Acquisition
Land	(1,337)
Building & Improvements	(6,240)
Gross Amount at Which Carried at Close of Period
Land	384
Building & Improvements (3)	2,177
Total	2,561
Accumulated Depreciation	606
100 Church Street
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	370,000
Initial Cost
Land	34,994
Building & Improvements	183,932
Cost Capitalized Subsequent To Acquisition
Land	0
Building & Improvements	10,100
Gross Amount at Which Carried at Close of Period
Land	34,994
Building & Improvements (3)	194,032
Total	229,026
Accumulated Depreciation	71,515
125 Park Avenue
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	0
Initial Cost
Land	120,900
Building & Improvements	270,598
Cost Capitalized Subsequent To Acquisition
Land	0
Building & Improvements	19,946
Gross Amount at Which Carried at Close of Period
Land	120,900
Building & Improvements (3)	290,544
Total	411,444
Accumulated Depreciation	120,545
19 East 65th Street
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	0
Initial Cost
Land	8,603
Building & Improvements	2,074
Cost Capitalized Subsequent To Acquisition
Land	0
Building & Improvements	1,888
Gross Amount at Which Carried at Close of Period
Land	8,603
Building & Improvements (3)	3,962
Total	12,565
Accumulated Depreciation	4
304 Park Avenue
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	0
Initial Cost
Land	54,489
Building & Improvements	90,643
Cost Capitalized Subsequent To Acquisition
Land	0
Building & Improvements	7,425
Gross Amount at Which Carried at Close of Period
Land	54,489
Building & Improvements (3)	98,068
Total	152,557
Accumulated Depreciation	29,685
752-760 Madison Avenue
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	0
Initial Cost
Land	284,286
Building & Improvements	8,314
Cost Capitalized Subsequent To Acquisition
Land	(2,450)
Building & Improvements	107,078
Gross Amount at Which Carried at Close of Period
Land	281,836
Building & Improvements (3)	115,392
Total	397,228
Accumulated Depreciation	4,991
719 Seventh Avenue
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	50,000
Initial Cost
Land	41,180
Building & Improvements	46,232
Cost Capitalized Subsequent To Acquisition
Land	0
Building & Improvements	(4,724)
Gross Amount at Which Carried at Close of Period
Land	41,180
Building & Improvements (3)	41,508
Total	82,688
Accumulated Depreciation	4,388
110 Greene Street
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	0
Initial Cost
Land	45,120
Building & Improvements	228,393
Cost Capitalized Subsequent To Acquisition
Land	0
Building & Improvements	4,166
Gross Amount at Which Carried at Close of Period
Land	45,120
Building & Improvements (3)	232,559
Total	277,679
Accumulated Depreciation	49,982
185 Broadway
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	210,148
Initial Cost
Land	45,540
Building & Improvements	27,865
Cost Capitalized Subsequent To Acquisition
Land	0
Building & Improvements	204,968
Gross Amount at Which Carried at Close of Period
Land	45,540
Building & Improvements (3)	232,833
Total	278,373
Accumulated Depreciation	2,658
690 Madison Avenue
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	60,000
Initial Cost
Land	13,820
Building & Improvements	51,732
Cost Capitalized Subsequent To Acquisition
Land	0
Building & Improvements	28
Gross Amount at Which Carried at Close of Period
Land	13,820
Building & Improvements (3)	51,760
Total	65,580
Accumulated Depreciation	2,044
245 Park Avenue
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	1,712,750
Initial Cost
Land	505,458
Building & Improvements	1,394,584
Cost Capitalized Subsequent To Acquisition
Land	0
Building & Improvements	14,597
Gross Amount at Which Carried at Close of Period
Land	505,458
Building & Improvements (3)	1,409,181
Total	1,914,639
Accumulated Depreciation	20,877
Other
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	0
Initial Cost
Land	1,734
Building & Improvements	16,224
Cost Capitalized Subsequent To Acquisition
Land	0
Building & Improvements	610,711
Gross Amount at Which Carried at Close of Period
Land	1,734
Building & Improvements (3)	626,935
Total	628,669
Accumulated Depreciation	$ 22,567
885 Third Avenue - Office Condominium Units (3)
Gross Amount at Which Carried at Close of Period
Approximate Square Feet | ft²	414,317	414,317
719 Seventh Avenue | 719 Seventh Avenue
Gross Amount at Which Carried at Close of Period
Interest in property (as a percent)	75%

Schedule III - Real Estate an_3

Schedule III - Real Estate and Accumulated Depreciation (Activity in Real Estate and Accumulated Depreciation) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Changes in real estate
Balance at beginning of year	$ 7,650,907	$ 7,355,079	$ 8,784,567
Property acquisitions	1,900,042	124,103	178,635
Improvements	335,413	296,876	481,327
Retirements/disposals/deconsolidation	(687,563)	(125,151)	(2,089,450)
Balance at end of year	9,198,799	7,650,907	7,355,079
Aggregate cost of land, buildings and improvements before depreciation	6,400,000
Changes in accumulated depreciation
Balance at beginning of year	1,896,199	1,956,077	2,060,560
Depreciation for year	175,465	174,219	270,843
Retirements/disposals/deconsolidation	(32,110)	(234,097)	(375,326)
Balance at end of year	$ 2,039,554	$ 1,896,199	$ 1,956,077