ALEXANDERS INC, 10-Q filed on August 05, 2024
v3.24.2.u1
Cover
6 Months Ended
Jun. 30, 2024
shares
Cover [Abstract]  
Document Type 10-Q
Document Quarterly Report true
Document Period End Date Jun. 30, 2024
Document Transition Report false
Entity File Number 001-06064
Entity Registrant Name ALEXANDERS INC
Entity Incorporation, State or Country Code DE
Entity Tax Identification Number 51-0100517
Entity Address, Address Line One 210 Route 4 East,
Entity Address, City or Town Paramus,
Entity Address, State or Province NJ
Entity Address, Postal Zip Code 07652
City Area Code (201)
Local Phone Number 587-8541
Title of 12(b) Security Common Stock, $1 par value per share
Trading Symbol ALX
Security Exchange Name NYSE
Entity Current Reporting Status Yes
Entity Interactive Data Current Yes
Entity Filer Category Accelerated Filer
Entity Small Business false
Entity Emerging Growth Company false
Entity Shell Company false
Entity Common Stock, Shares Outstanding 5,107,290
Amendment Flag false
Document Fiscal Year Focus 2024
Document Fiscal Period Focus Q2
Entity Central Index Key 0000003499
Current Fiscal Year End Date --12-31
v3.24.2.u1
CONSOLIDATED BALANCE SHEETS - USD ($)
$ in Thousands
Jun. 30, 2024
Dec. 31, 2023
Real estate, at cost:    
Land $ 32,271 $ 32,271
Buildings and leasehold improvements 1,033,488 1,034,068
Development and construction in progress 4,279 281
Total 1,070,038 1,066,620
Accumulated depreciation and amortization (429,426) (415,903)
Real estate, net 640,612 650,717
Cash and cash equivalents 410,948 531,855
Restricted cash 113,429 21,122
Tenant and other receivables 4,603 6,076
Receivable arising from the straight-lining of rents 113,790 124,866
Deferred leasing costs, net, including unamortized leasing fees to Vornado of $22,877 and $19,540, respectively 166,439 24,888
Other assets 30,929 44,156
Total assets 1,480,750 1,403,680
LIABILITIES AND EQUITY    
Mortgages payable, net of deferred debt issuance costs 1,082,012 1,092,551
Accounts payable and accrued expenses 50,778 51,750
Lease incentive liability 113,618 0
Total liabilities 1,268,230 1,166,023
Commitments and contingencies
Preferred stock: $1.00 par value per share; authorized, 3,000,000 shares; issued and outstanding, none 0 0
Common stock: $1.00 par value per share; authorized, 10,000,000 shares; issued, 5,173,450 shares; outstanding, 5,107,290 shares 5,173 5,173
Additional capital 34,765 34,315
Retained earnings 160,649 182,336
Accumulated other comprehensive income 12,301 16,201
Equity before treasury stock 212,888 238,025
Treasury stock: 66,160 shares, at cost (368) (368)
Total equity 212,520 237,657
Total liabilities and equity 1,480,750 1,403,680
Related Party    
LIABILITIES AND EQUITY    
Amounts due to Vornado 623 715
Other liabilities 623 715
Nonrelated Party    
LIABILITIES AND EQUITY    
Amounts due to Vornado 21,199 21,007
Other liabilities $ 21,199 $ 21,007
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CONSOLIDATED BALANCE SHEETS (Parenthetical) - USD ($)
$ in Thousands
Jun. 30, 2024
Dec. 31, 2023
Statement of Financial Position [Abstract]    
Unamortized leasing fees to Vornado $ 22,877 $ 19,540
Preferred stock: par value per share (in usd per share) $ 1.00 $ 1.00
Preferred stock: authorized shares (in shares) 3,000,000 3,000,000
Preferred stock: issued shares (in shares) 0 0
Preferred stock: outstanding shares (in shares) 0 0
Common stock: par value per share (in usd per share) $ 1.00 $ 1.00
Common stock: authorized shares (in shares) 10,000,000 10,000,000
Common stock: issued shares (in shares) 5,173,450 5,173,450
Common stock: outstanding shares (in shares) 5,107,290 5,107,290
Treasury stock: shares (in shares) 66,160 66,160
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CONSOLIDATED STATEMENTS OF INCOME - USD ($)
$ in Thousands
3 Months Ended 6 Months Ended
Jun. 30, 2024
Jun. 30, 2023
Jun. 30, 2024
Jun. 30, 2023
REVENUES        
Rental revenues $ 53,392 $ 53,673 $ 114,789 $ 106,614
EXPENSES        
Operating, including fees to Vornado of $1,345, $1,684, $3,104 and $3,223, respectively (24,991) (24,818) (50,254) (49,762)
Depreciation and amortization (8,697) (8,081) (18,174) (15,559)
General and administrative, including management fees to Vornado of $610, $610, $1,220 and $1,220, respectively (2,159) (1,906) (3,635) (3,265)
Total expenses (35,847) (34,805) (72,063) (68,586)
Interest and other income 7,054 4,523 14,216 8,842
Interest and debt expense (16,219) (13,196) (32,453) (25,449)
Net gain on sale of real estate 0 53,952 0 53,952
Net income $ 8,380 $ 64,147 $ 24,489 $ 75,373
Net income per common share - basic (in usd per share) $ 1.63 $ 12.51 $ 4.77 $ 14.70
Net income per common share - diluted (in usd per share) $ 1.63 $ 12.51 $ 4.77 $ 14.70
Weighted average shares outstanding - basic (in shares) 5,131,902 5,128,823 5,131,290 5,127,959
Weighted average shares outstanding - diluted (in shares) 5,131,902 5,128,823 5,131,290 5,127,959
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CCONSOLIDATED STATEMENTS OF INCOME (Parenthetical) - USD ($)
$ in Thousands
3 Months Ended 6 Months Ended
Jun. 30, 2024
Jun. 30, 2023
Jun. 30, 2024
Jun. 30, 2023
Operating fees to Vornado $ 24,991 $ 24,818 $ 50,254 $ 49,762
Management fees 2,159 1,906 3,635 3,265
Related Party        
Operating fees to Vornado 1,345 1,684 3,104 3,223
Management fees $ 610 $ 610 $ 1,220 $ 1,220
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CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME - USD ($)
$ in Thousands
3 Months Ended 6 Months Ended
Jun. 30, 2024
Jun. 30, 2023
Jun. 30, 2024
Jun. 30, 2023
Statement of Comprehensive Income [Abstract]        
Net income $ 8,380 $ 64,147 $ 24,489 $ 75,373
Other comprehensive (loss) income:        
Change in fair value of interest rate derivatives and other (3,360) 3,110 (3,900) (534)
Comprehensive income $ 5,020 $ 67,257 $ 20,589 $ 74,839
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CONSOLIDATED STATEMENTS OF CHANGES IN EQUITY - USD ($)
$ in Thousands
Total
Common Stock
Additional Capital
Retained Earnings
Accumulated  Other Comprehensive Income
Treasury Stock
Beginning balance, (in shares) at Dec. 31, 2022   5,173,000        
Beginning balance, value at Dec. 31, 2022 $ 236,499 $ 5,173 $ 33,865 $ 172,243 $ 25,586 $ (368)
Increase (Decrease) in Stockholders' Equity [Roll Forward]            
Net income 75,373     75,373    
Dividends paid (46,144)     (46,144)    
Change in fair value of interest rate derivatives and other (534)       (534)  
Deferred stock unit grants 450   450      
Ending balance, (in shares) at Jun. 30, 2023   5,173,000        
Ending balance, value at Jun. 30, 2023 265,644 $ 5,173 34,315 201,472 25,052 (368)
Beginning balance, (in shares) at Mar. 31, 2023   5,173,000        
Beginning balance, value at Mar. 31, 2023 221,009 $ 5,173 33,865 160,397 21,942 (368)
Increase (Decrease) in Stockholders' Equity [Roll Forward]            
Net income 64,147     64,147    
Dividends paid (23,072)     (23,072)    
Change in fair value of interest rate derivatives and other 3,110       3,110  
Deferred stock unit grants 450   450      
Ending balance, (in shares) at Jun. 30, 2023   5,173,000        
Ending balance, value at Jun. 30, 2023 $ 265,644 $ 5,173 34,315 201,472 25,052 (368)
Beginning balance, (in shares) at Dec. 31, 2023 5,173,450 5,173,000        
Beginning balance, value at Dec. 31, 2023 $ 237,657 $ 5,173 34,315 182,336 16,201 (368)
Increase (Decrease) in Stockholders' Equity [Roll Forward]            
Net income 24,489     24,489    
Dividends paid (46,176)     (46,176)    
Change in fair value of interest rate derivatives and other (3,900)       (3,900)  
Deferred stock unit grants $ 450   450      
Ending balance, (in shares) at Jun. 30, 2024 5,173,450 5,173,000        
Ending balance, value at Jun. 30, 2024 $ 212,520 $ 5,173 34,765 160,649 12,301 (368)
Beginning balance, (in shares) at Mar. 31, 2024   5,173,000        
Beginning balance, value at Mar. 31, 2024 230,138 $ 5,173 34,315 175,357 15,661 (368)
Increase (Decrease) in Stockholders' Equity [Roll Forward]            
Net income 8,380     8,380    
Dividends paid (23,088)     (23,088)    
Change in fair value of interest rate derivatives and other (3,360)       (3,360)  
Deferred stock unit grants $ 450   450      
Ending balance, (in shares) at Jun. 30, 2024 5,173,450 5,173,000        
Ending balance, value at Jun. 30, 2024 $ 212,520 $ 5,173 $ 34,765 $ 160,649 $ 12,301 $ (368)
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CONSOLIDATED STATEMENTS OF CHANGES IN EQUITY(Parenthetical) - $ / shares
3 Months Ended 6 Months Ended
Jun. 30, 2024
Jun. 30, 2023
Jun. 30, 2024
Jun. 30, 2023
Statement of Stockholders' Equity [Abstract]        
Dividends per common share (in usd per share) $ 4.50 $ 4.50 $ 9.00 $ 9.00
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CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($)
$ in Thousands
6 Months Ended
Jun. 30, 2024
Jun. 30, 2023
CASH FLOWS FROM OPERATING ACTIVITIES    
Net income $ 24,489 $ 75,373
Adjustments to reconcile net income to net cash provided by operating activities:    
Depreciation and amortization, including amortization of debt issuance costs 19,118 16,399
Net gain on sale of real estate 0 (53,952)
Straight-lining of rents 11,076 4,169
Interest rate cap premium amortization 5,908 0
Stock-based compensation expense 450 450
Other non-cash adjustments (3,804) 4,431
Change in operating assets and liabilities:    
Tenant and other receivables 674 (666)
Other assets (142,782) 17,666
Amounts due to Vornado (218) 151
Accounts payable and accrued expenses (192) 1,900
Lease incentive liability 113,618 0
Other liabilities (10) (12)
Net cash provided by operating activities 28,327 65,909
CASH FLOWS FROM INVESTING ACTIVITIES    
Construction in progress and real estate additions (6,182) (2,894)
Proceeds from maturities of U.S. Treasury bills 0 264,881
Proceeds from sale of real estate 0 67,821
Proceeds from interest rate cap 6,563 0
Purchase of interest rate cap 0 (11,258)
Net cash provided by investing activities 381 318,550
CASH FLOWS FROM FINANCING ACTIVITIES    
Dividends paid (46,176) (46,144)
Debt repayment (10,000) 0
Debt issuance costs (1,132) (38)
Net cash used in financing activities (57,308) (46,182)
Net (decrease) increase in cash and cash equivalents and restricted cash (28,600) 338,277
Cash and cash equivalents and restricted cash at beginning of period 552,977 214,478
Cash and cash equivalents and restricted cash at end of period 524,377 552,755
RECONCILIATION OF CASH AND CASH EQUIVALENTS AND RESTRICTED CASH    
Cash and cash equivalents at beginning of period 531,855 194,933
Restricted cash at beginning of period 21,122 19,545
Cash and cash equivalents and restricted cash at beginning of period 552,977 214,478
Cash and cash equivalents at end of period 410,948 531,331
Restricted cash at end of period 113,429 21,424
Cash and cash equivalents and restricted cash at end of period 524,377 552,755
SUPPLEMENTAL DISCLOSURE OF CASH FLOW INFORMATION    
Cash payments for interest 32,108 23,761
NON-CASH TRANSACTIONS    
Liability for real estate additions, including $126 for development fees due to Vornado in 2024 964 798
Write-off of fully depreciated assets $ 1,759 $ 5,808
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CONSOLIDATED STATEMENTS OF CASH FLOWS (Parenthetical)
$ in Thousands
6 Months Ended
Jun. 30, 2024
USD ($)
Development fees $ 964
Vornado  
Development fees $ 126
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Organization
6 Months Ended
Jun. 30, 2024
Organization, Consolidation and Presentation of Financial Statements [Abstract]  
Organization Organization
Alexander’s, Inc. (NYSE: ALX) is a real estate investment trust (“REIT”), incorporated in Delaware, engaged in leasing, managing, developing and redeveloping its properties. All references to “we,” “us,” “our,” “Company” and “Alexander’s” refer to Alexander’s, Inc. and its consolidated subsidiaries. We are managed by, and our properties are leased and developed by, Vornado Realty Trust (“Vornado”) (NYSE: VNO). We have five properties in New York City.
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Basis of Presentation
6 Months Ended
Jun. 30, 2024
Organization, Consolidation and Presentation of Financial Statements [Abstract]  
Basis of Presentation Basis of Presentation
The accompanying consolidated financial statements are unaudited and include the accounts of Alexander’s and its consolidated subsidiaries. All adjustments (which include only normal recurring adjustments) necessary to present fairly the financial position, results of operations and changes in cash flows have been made. Certain information and footnote disclosures normally included in financial statements prepared in accordance with accounting principles generally accepted in the United States of America (“GAAP”) have been condensed or omitted. These consolidated financial statements have been prepared in accordance with the instructions to Form 10-Q of the Securities and Exchange Commission (the “SEC”) and should be read in conjunction with the consolidated financial statements and notes thereto included in our Annual Report on Form 10-K for the year ended December 31, 2023, as filed with the SEC.
We have made estimates and assumptions that affect the reported amounts of assets and liabilities and disclosure of contingent assets and liabilities at the date of the consolidated financial statements and the reported amounts of revenues and expenses during the reporting periods. Actual results could differ from those estimates. The results of operations for the three and six months ended June 30, 2024 are not necessarily indicative of the operating results for the full year.
We operate in one reportable segment.
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Recently Issued Accounting Literature
6 Months Ended
Jun. 30, 2024
Accounting Standards Update and Change in Accounting Principle [Abstract]  
Recently Issued Accounting Literature Recently Issued Accounting Literature
In November 2023, the Financial Accounting Standards Board (“FASB”) issued Accounting Standards Update (“ASU”) 2023-07, Segment Reporting (Topic 280): Improvements to Reportable Segment Disclosures (“ASU 2023-07”). ASU 2023-07 aims to improve reportable segment disclosure requirements, primarily through enhanced disclosures about significant segment expenses. ASU 2023-07 requires disclosure of significant segment expenses that are regularly provided to the chief operating decision maker and included within each reported measure of segment profit or loss. The update also requires disclosure regarding the chief operating decision maker and expands the interim segment disclosure requirements. ASU 2023-07 is effective for fiscal years beginning after December 15, 2023, and interim periods within fiscal years beginning after December 15, 2024, with early adoption permitted. We are currently evaluating the impact of ASU 2023-07 on our consolidated financial statements.
In December 2023, the FASB issued ASU 2023-09, Income Taxes (Topic 740): Improvements to Income Tax Disclosures (“ASU 2023-09”). ASU 2023-09 requires entities to disclose additional information with respect to the effective tax rate reconciliation and to disclose the disaggregation by jurisdiction of income tax expense and income taxes paid. ASU 2023-09 is effective for fiscal years beginning after December 15, 2024, with early adoption permitted. We are currently evaluating the impact of ASU 2023-09 on our consolidated financial statements.
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Revenue Recognition
6 Months Ended
Jun. 30, 2024
Revenue from Contract with Customer [Abstract]  
Revenue Recognition Revenue Recognition
The following is a summary of revenue sources for the three and six months ended June 30, 2024 and 2023.
For the Three Months Ended June 30,For the Six Months Ended June 30,
(Amounts in thousands)2024202320242023
Lease revenues$51,288 $51,512 $110,634 $102,548 
Parking revenue1,185 1,114 2,315 2,210 
Tenant services919 1,047 1,840 1,856 
Rental revenues$53,392 $53,673 $114,789 $106,614 
The components of lease revenues for the three and six months ended June 30, 2024 and 2023 are as follows:
For the Three Months Ended June 30,For the Six Months Ended June 30,
(Amounts in thousands)2024202320242023
Fixed lease revenues$34,400 $34,839 $76,934 $69,563 
Variable lease revenues16,888 16,673 33,700 32,985 
Lease revenues$51,288 $51,512 $110,634 $102,548 

Bloomberg L.P. (“Bloomberg”) accounted for revenue of $60,946,000 and $59,177,000 for the six months ended June 30, 2024 and 2023, respectively, representing approximately 53% and 56% of our rental revenues in each period, respectively. No other tenant accounted for more than 10% of our rental revenues. If we were to lose Bloomberg as a tenant, or if Bloomberg were to be unable to fulfill its obligations under its lease, it would adversely affect our results of operations and financial condition. In order to assist us in our continuing assessment of Bloomberg’s creditworthiness, we receive certain confidential financial information and metrics from Bloomberg. In addition, we access and evaluate financial information regarding Bloomberg from other private sources, as well as publicly available data.

On May 3, 2024, Alexander’s and Bloomberg entered into an agreement to extend the leases covering approximately 947,000 square feet at our 731 Lexington Avenue property that were scheduled to expire in February 2029 for a term of eleven years to February 2040. Upon execution of this lease extension, we paid a $32,000,000 leasing commission, of which $26,500,000 was to a third-party broker and $5,500,000 was to Vornado.

In connection with the lease extension, Bloomberg is entitled to a $113,618,000 tenant fund which is accounted for as a lease incentive under GAAP. Accordingly, we recorded a deferred lease incentive asset of $113,618,000, which is amortized as a reduction to rental revenues over the remaining term of the lease, and a corresponding liability. These amounts are included in “Deferred leasing costs, net” and “Lease incentive liability,” respectively, on our consolidated balance sheet as of June 30, 2024.
On December 3, 2022, IKEA closed its 112,000 square foot store at our Rego Park I property under a lease that was set to expire in December 2030. The lease included a right to terminate effective no earlier than March 16, 2026, subject to payment of rent through the termination date and an additional termination payment equal to the lesser of $10,000,000 or the amount of rent due under the remaining term. On September 27, 2023, we entered into a lease modification agreement with IKEA which accelerated its lease termination date to April 1, 2024. During the fourth quarter of 2023 and the first quarter of 2024, IKEA paid its remaining rent obligation through March 16, 2026 and the $10,000,000 termination payment.
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Real Estate Sale
6 Months Ended
Jun. 30, 2024
Real Estate [Abstract]  
Real Estate Sale Real Estate Sale
On May 19, 2023, we sold the Rego Park III land parcel in Queens, New York, for $71,060,000 inclusive of consideration for Brownfield tax benefits and reimbursement of costs for plans, specifications and improvements to date. Net proceeds from the sale were $67,821,000 after closing costs and the financial statement gain was $53,952,000.
v3.24.2.u1
Related Party Transactions
6 Months Ended
Jun. 30, 2024
Related Party Transactions [Abstract]  
Related Party Transactions Related Party Transactions
Vornado
As of June 30, 2024, Vornado owned 32.4% of our outstanding common stock. We are managed by, and our properties are leased and developed by, Vornado, pursuant to the agreements described below, which expire in March of each year and are automatically renewable.
Management and Development Agreements
We pay Vornado an annual management fee equal to the sum of (i) $2,800,000, (ii) 2% of gross revenue from the Rego Park II shopping center, (iii) $0.50 per square foot of the tenant-occupied office and retail space at 731 Lexington Avenue, and (iv) $376,000, escalating at 3% per annum, for managing the common area of 731 Lexington Avenue. Vornado is also entitled to a development fee equal to 6% of development costs, as defined.
Leasing and Other Agreements
Vornado also provides us with leasing services for a fee of 3% of rent for the first ten years of a lease term, 2% of rent for the eleventh through the twentieth year of a lease term, and 1% of rent for the twenty-first through thirtieth year of a lease term, subject to the payment of rents by tenants. Under the agreements in effect prior to May 1, 2024, in the event third-party real estate brokers were used, the fees to Vornado increased by 1% and Vornado was responsible for the fees to the third-party real estate brokers (“Third-Party Lease Commissions”). On May 1, 2024, our Board of Directors approved amendments to the leasing agreements, subject to applicable lender consents, pursuant to which the Company is responsible for any Third-Party Lease Commissions and, in such circumstances, Vornado’s fee is 33% of the applicable Third-Party Lease Commission.
Vornado is also entitled to a commission upon the sale of any of our assets equal to 3% of gross proceeds, as defined, for asset sales less than $50,000,000 and 1% of gross proceeds, as defined, for asset sales of $50,000,000 or more.
We also have agreements with Building Maintenance Services LLC, a wholly owned subsidiary of Vornado, to supervise (i) cleaning, engineering and security services at our 731 Lexington Avenue property and (ii) security services at our Rego Park I and Rego Park II properties and The Alexander apartment tower. In addition, we have an agreement with a wholly owned subsidiary of Vornado to manage the parking garages at our Rego Park I and Rego Park II properties.
The following is a summary of fees earned by Vornado under the various agreements discussed above.
 For the Three Months Ended June 30,For the Six Months Ended June 30,
(Amounts in thousands)2024202320242023
Company management fees$700 $700 $1,400 $1,400 
Development fees111 — 126 — 
Leasing fees5,517 129 5,555 170 
Commission on sale of real estate— 711 — 711 
Property management, cleaning, engineering, parking and security fees1,213 1,550 2,849 2,959 
$7,541 $3,090 $9,930 $5,240 
As of June 30, 2024, the amounts due to Vornado were $480,000 for management, property management, cleaning, engineering and security fees, $126,000 for development fees and $17,000 for leasing fees. As of December 31, 2023, the amounts due to Vornado were $646,000 for management, property management, cleaning, engineering and security fees and $69,000 for leasing fees.
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Mortgages Payable
6 Months Ended
Jun. 30, 2024
Debt Disclosure [Abstract]  
Mortgages Payable Mortgages Payable
On June 9, 2023, we exercised our remaining one-year extension option on the $500,000,000 interest-only mortgage loan on the office condominium of our 731 Lexington Avenue property. The interest rate on the loan remained at LIBOR plus 0.90% through July 15, 2023 and then at the Prime Rate through loan maturity on June 11, 2024. In addition, in June 2023, we purchased an interest rate cap for $11,258,000, which capped LIBOR at 6.00% through July 15, 2023 and then the Prime Rate at 6.00% through loan maturity. On June 11, 2024, we entered into a four-month extension of the loan and simultaneously paid down the principal balance by $10,000,000 to $490,000,000. The interest-only mortgage loan remains at the Prime rate (8.50% as of June 30, 2024) through the extended loan maturity of October 11, 2024. We also escrowed $66,808,000 with the lender in connection with the tenant fund in the Bloomberg lease extension which is included in “Restricted cash” on our consolidated balance sheet as of June 30, 2024.
The following is a summary of our outstanding mortgages payable as of June 30, 2024 and December 31, 2023. We may refinance our maturing debt as it comes due or choose to pay it down.
  Interest Rate at June 30, 2024Balance at
(Amounts in thousands)MaturityJune 30, 2024December 31, 2023
First mortgages secured by:
731 Lexington Avenue, office condominium (1)
Oct. 11, 20248.50%$490,000 $500,000 
731 Lexington Avenue, retail condominium (2)(3)
Aug. 05, 20251.76%300,000 300,000 
Rego Park II shopping center (2)(4)
Dec. 12, 20255.60%202,544 202,544 
The Alexander apartment towerNov. 01, 20272.63%94,000 94,000 
Total1,086,544 1,096,544 
Deferred debt issuance costs, net of accumulated amortization of $18,583 and $17,639, respectively
(4,532)(3,993)
$1,082,012 $1,092,551 
(1)Interest at the Prime Rate.
(2)Interest rate listed represents the rate in effect as of June 30, 2024 based on SOFR as of contractual reset date plus contractual spread, adjusted for hedging instruments as applicable.
(3)Interest at SOFR plus 1.51% which was swapped to a fixed rate of 1.76% through May 2025.
(4)Interest at SOFR plus 1.45% (SOFR is capped at a rate of 4.15% through November 2024).
v3.24.2.u1
Stock-Based Compensation
6 Months Ended
Jun. 30, 2024
Share-Based Payment Arrangement [Abstract]  
Stock-Based Compensation Stock-Based Compensation
We account for stock-based compensation in accordance with ASC Topic 718, Compensation – Stock Compensation (“ASC 718”). Our 2016 Omnibus Stock Plan (the “Plan”) provides for grants of incentive and non-qualified stock options, restricted stock, stock appreciation rights, deferred stock units (“DSUs”) and performance shares, as defined, to the directors, officers and employees of the Company and Vornado.

In May 2024, we granted each of the members of our Board of Directors 357 DSUs with a market value of $75,000 per grant. The grant date fair value of these awards was $56,250 per grant, or $450,000 in the aggregate, in accordance with ASC 718. The DSUs entitle the holders to receive shares of the Company’s common stock without the payment of any consideration. The DSUs vested immediately and accordingly, were expensed on the date of grant, but the shares of common stock underlying the DSUs are not deliverable to the grantee until the grantee is no longer serving on the Company’s Board of Directors. As of June 30, 2024, there were 26,244 DSUs outstanding and 479,543 shares were available for future grant under the Plan.
v3.24.2.u1
Fair Value Measurements
6 Months Ended
Jun. 30, 2024
Fair Value Disclosures [Abstract]  
Fair Value Measurements Fair Value Measurements
ASC Topic 820, Fair Value Measurement (“ASC 820”) defines fair value and establishes a framework for measuring fair value. ASC 820 establishes a fair value hierarchy that prioritizes observable and unobservable inputs used to measure fair value into three levels: Level 1 – quoted prices (unadjusted) in active markets that are accessible at the measurement date for assets or liabilities that are highly liquid and are actively traded in secondary markets; Level 2 – observable prices that are based on inputs not quoted in active markets, but corroborated by market data; and Level 3 – unobservable inputs that are used when little or no market data is available. The fair value hierarchy gives the highest priority to Level 1 inputs and the lowest priority to Level 3 inputs. In determining fair value, we utilize valuation techniques that maximize the use of observable inputs and minimize the use of unobservable inputs to the extent possible as well as consider counterparty credit risk in our assessment of fair value.

Financial Assets and Liabilities Measured at Fair Value
Financial assets measured at fair value on our consolidated balance sheet as of June 30, 2024 consist of interest rate derivatives, which are presented in the table below based on their level in the fair value hierarchy. There were no financial liabilities measured at fair value as of June 30, 2024.
 As of June 30, 2024
(Amounts in thousands)TotalLevel 1Level 2Level 3
Interest rate derivatives (included in other assets)$12,800 $— $12,800 $— 

Financial assets measured at fair value on our consolidated balance sheet as of December 31, 2023 consist of interest rate derivatives, which are presented in the table below based on their level in the fair value hierarchy. There were no financial liabilities measured at fair value as of December 31, 2023. 
 As of As of December 31, 2023
(Amounts in thousands)TotalLevel 1Level 2Level 3
Interest rate derivatives (included in other assets)$22,608 $— $22,608 $— 
Interest Rate Derivatives
We recognize the fair value of all interest rate derivatives in “other assets” or “other liabilities” on our consolidated balance sheets and since all of our interest rate derivatives have been designated as cash flow hedges, changes in the fair value are recognized in other comprehensive income. The table below summarizes our interest rate derivatives, all of which hedge the interest rate risk attributable to the variable rate debt noted as of June 30, 2024 and December 31, 2023, respectively.
Fair Value as ofAs of June 30, 2024
(Amounts in thousands)June 30, 2024December 31, 2023Notional AmountSwapped RateExpiration Date
Interest rate swap related to:
731 Lexington Avenue mortgage loan, retail condominium$11,880 $16,315 $300,000 1.76%05/25
Interest rate caps related to:
Rego Park II shopping center mortgage loan920 1,370 202,544(1)11/24
731 Lexington Avenue mortgage loan, office condominium— 4,923 N/AN/AN/A
Included in other assets$12,800 $22,608 
(1)SOFR cap strike rate of 4.15%.
9.Fair Value Measurements - continued
Financial Assets and Liabilities not Measured at Fair Value
Financial assets and liabilities that are not measured at fair value on our consolidated balance sheets include cash equivalents and mortgages payable. Cash equivalents are carried at cost, which approximates fair value due to their short-term maturities and are classified as Level 1. The fair value of our mortgages payable is calculated by discounting the future contractual cash flows of these instruments using current risk-adjusted rates available to borrowers with similar credit ratings, which are provided by a third-party specialist, and is classified as Level 2. The table below summarizes the carrying amount and fair value of these financial instruments as of June 30, 2024 and December 31, 2023, respectively.

 As of June 30, 2024As of December 31, 2023
(Amounts in thousands)Carrying
Amount
Fair
Value
Carrying
Amount
Fair
Value
Assets:
Cash equivalents
$129,129 $129,129 $363,535 $363,535 
Liabilities:
Mortgages payable (excluding deferred debt issuance costs, net)$1,086,544 $1,066,388 $1,096,544 $1,071,887 
v3.24.2.u1
Commitments and Contingencies
6 Months Ended
Jun. 30, 2024
Commitments and Contingencies Disclosure [Abstract]  
Commitments and Contingencies Commitments and Contingencies
Insurance
We maintain general liability insurance with limits of $300,000,000 per occurrence and per property, of which the first $30,000,000 includes communicable disease coverage, and all-risk property and rental value insurance coverage with limits of $1.7 billion per occurrence, including coverage for acts of terrorism, with sub-limits for certain perils such as floods and earthquakes on each of our properties and excluding communicable disease coverage.
Fifty Ninth Street Insurance Company, LLC (“FNSIC”), our wholly owned consolidated subsidiary, acts as a direct insurer for coverage for acts of terrorism, including nuclear, biological, chemical and radiological (“NBCR”) acts, as defined by the Terrorism Risk Insurance Act of 2002, as amended to date and which has been extended through December 2027. Coverage for acts of terrorism (including NBCR acts) is up to $1.7 billion per occurrence and in the aggregate. Coverage for acts of terrorism (excluding NBCR acts) is fully reinsured by third party insurance companies and the Federal government with no exposure to FNSIC. For NBCR acts, FNSIC is responsible for a $316,000 deductible and 20% of the balance of a covered loss, and the Federal government is responsible for the remaining 80% of a covered loss. We are ultimately responsible for any loss incurred by FNSIC.
We continue to monitor the state of the insurance market and the scope and costs of coverage for acts of terrorism or other events. However, we cannot anticipate what coverage will be available on commercially reasonable terms in the future. We are responsible for uninsured losses and for deductibles and losses in excess of our insurance coverage, which could be material.
Our loans contain customary covenants requiring us to maintain insurance. Although we believe that we have adequate insurance coverage for purposes of these agreements, we may not be able to obtain an equivalent amount of coverage at reasonable costs in the future. If lenders insist on greater coverage than we are able to obtain, it could adversely affect our ability to finance or refinance our properties.
Letters of Credit
Approximately $900,000 of standby letters of credit were issued and outstanding as of June 30, 2024.
Other
There are various legal actions brought against us from time-to-time in the ordinary course of business. In our opinion, the outcome of such pending matters in the aggregate will not have a material effect on our financial position, results of operations or cash flows.
v3.24.2.u1
Earnings Per Share
6 Months Ended
Jun. 30, 2024
Earnings Per Share [Abstract]  
Earnings Per Share Earnings Per Share
The following table sets forth the computation of basic and diluted income per share, including a reconciliation of net income and the number of shares used in computing basic and diluted income per share. Basic income per share is determined using the weighted average shares of common stock (including deferred stock units) outstanding during the period. Diluted income per share is determined using the weighted average shares of common stock (including deferred stock units) outstanding during the period, and assumes all potentially dilutive securities were converted into common shares at the earliest date possible. There were no potentially dilutive securities outstanding during the three and six months ended June 30, 2024 and 2023.
 For the Three Months Ended June 30,For the Six Months
Ended June 30,
(Amounts in thousands, except share and per share amounts)
2024202320242023
Net income $8,380 $64,147 $24,489 $75,373 
Weighted average shares outstanding – basic and diluted
5,131,902 5,128,823 5,131,290 5,127,959 
Net income per common share – basic and diluted$1.63 $12.51 $4.77 $14.70 
v3.24.2.u1
Basis of Presentation (Policies)
6 Months Ended
Jun. 30, 2024
Organization, Consolidation and Presentation of Financial Statements [Abstract]  
Basis of Presentation
The accompanying consolidated financial statements are unaudited and include the accounts of Alexander’s and its consolidated subsidiaries. All adjustments (which include only normal recurring adjustments) necessary to present fairly the financial position, results of operations and changes in cash flows have been made. Certain information and footnote disclosures normally included in financial statements prepared in accordance with accounting principles generally accepted in the United States of America (“GAAP”) have been condensed or omitted. These consolidated financial statements have been prepared in accordance with the instructions to Form 10-Q of the Securities and Exchange Commission (the “SEC”) and should be read in conjunction with the consolidated financial statements and notes thereto included in our Annual Report on Form 10-K for the year ended December 31, 2023, as filed with the SEC.
We have made estimates and assumptions that affect the reported amounts of assets and liabilities and disclosure of contingent assets and liabilities at the date of the consolidated financial statements and the reported amounts of revenues and expenses during the reporting periods. Actual results could differ from those estimates. The results of operations for the three and six months ended June 30, 2024 are not necessarily indicative of the operating results for the full year.
We operate in one reportable segment.
Recently Issued Accounting Literature
In November 2023, the Financial Accounting Standards Board (“FASB”) issued Accounting Standards Update (“ASU”) 2023-07, Segment Reporting (Topic 280): Improvements to Reportable Segment Disclosures (“ASU 2023-07”). ASU 2023-07 aims to improve reportable segment disclosure requirements, primarily through enhanced disclosures about significant segment expenses. ASU 2023-07 requires disclosure of significant segment expenses that are regularly provided to the chief operating decision maker and included within each reported measure of segment profit or loss. The update also requires disclosure regarding the chief operating decision maker and expands the interim segment disclosure requirements. ASU 2023-07 is effective for fiscal years beginning after December 15, 2023, and interim periods within fiscal years beginning after December 15, 2024, with early adoption permitted. We are currently evaluating the impact of ASU 2023-07 on our consolidated financial statements.
In December 2023, the FASB issued ASU 2023-09, Income Taxes (Topic 740): Improvements to Income Tax Disclosures (“ASU 2023-09”). ASU 2023-09 requires entities to disclose additional information with respect to the effective tax rate reconciliation and to disclose the disaggregation by jurisdiction of income tax expense and income taxes paid. ASU 2023-09 is effective for fiscal years beginning after December 15, 2024, with early adoption permitted. We are currently evaluating the impact of ASU 2023-09 on our consolidated financial statements.
Fair Value Measurements
ASC Topic 820, Fair Value Measurement (“ASC 820”) defines fair value and establishes a framework for measuring fair value. ASC 820 establishes a fair value hierarchy that prioritizes observable and unobservable inputs used to measure fair value into three levels: Level 1 – quoted prices (unadjusted) in active markets that are accessible at the measurement date for assets or liabilities that are highly liquid and are actively traded in secondary markets; Level 2 – observable prices that are based on inputs not quoted in active markets, but corroborated by market data; and Level 3 – unobservable inputs that are used when little or no market data is available. The fair value hierarchy gives the highest priority to Level 1 inputs and the lowest priority to Level 3 inputs. In determining fair value, we utilize valuation techniques that maximize the use of observable inputs and minimize the use of unobservable inputs to the extent possible as well as consider counterparty credit risk in our assessment of fair value.
v3.24.2.u1
Revenue Recognition (Tables)
6 Months Ended
Jun. 30, 2024
Revenue from Contract with Customer [Abstract]  
Schedule of Revenue
The following is a summary of revenue sources for the three and six months ended June 30, 2024 and 2023.
For the Three Months Ended June 30,For the Six Months Ended June 30,
(Amounts in thousands)2024202320242023
Lease revenues$51,288 $51,512 $110,634 $102,548 
Parking revenue1,185 1,114 2,315 2,210 
Tenant services919 1,047 1,840 1,856 
Rental revenues$53,392 $53,673 $114,789 $106,614 
Schedule of Components of Lease Revenue
The components of lease revenues for the three and six months ended June 30, 2024 and 2023 are as follows:
For the Three Months Ended June 30,For the Six Months Ended June 30,
(Amounts in thousands)2024202320242023
Fixed lease revenues$34,400 $34,839 $76,934 $69,563 
Variable lease revenues16,888 16,673 33,700 32,985 
Lease revenues$51,288 $51,512 $110,634 $102,548 
v3.24.2.u1
Related Party Transactions (Tables)
6 Months Ended
Jun. 30, 2024
Related Party Transactions [Abstract]  
Schedule of Fees to Vornado
The following is a summary of fees earned by Vornado under the various agreements discussed above.
 For the Three Months Ended June 30,For the Six Months Ended June 30,
(Amounts in thousands)2024202320242023
Company management fees$700 $700 $1,400 $1,400 
Development fees111 — 126 — 
Leasing fees5,517 129 5,555 170 
Commission on sale of real estate— 711 — 711 
Property management, cleaning, engineering, parking and security fees1,213 1,550 2,849 2,959 
$7,541 $3,090 $9,930 $5,240 
v3.24.2.u1
Mortgages Payable (Tables)
6 Months Ended
Jun. 30, 2024
Debt Disclosure [Abstract]  
Schedule of Long-term Debt Instruments
The following is a summary of our outstanding mortgages payable as of June 30, 2024 and December 31, 2023. We may refinance our maturing debt as it comes due or choose to pay it down.
  Interest Rate at June 30, 2024Balance at
(Amounts in thousands)MaturityJune 30, 2024December 31, 2023
First mortgages secured by:
731 Lexington Avenue, office condominium (1)
Oct. 11, 20248.50%$490,000 $500,000 
731 Lexington Avenue, retail condominium (2)(3)
Aug. 05, 20251.76%300,000 300,000 
Rego Park II shopping center (2)(4)
Dec. 12, 20255.60%202,544 202,544 
The Alexander apartment towerNov. 01, 20272.63%94,000 94,000 
Total1,086,544 1,096,544 
Deferred debt issuance costs, net of accumulated amortization of $18,583 and $17,639, respectively
(4,532)(3,993)
$1,082,012 $1,092,551 
(1)Interest at the Prime Rate.
(2)Interest rate listed represents the rate in effect as of June 30, 2024 based on SOFR as of contractual reset date plus contractual spread, adjusted for hedging instruments as applicable.
(3)Interest at SOFR plus 1.51% which was swapped to a fixed rate of 1.76% through May 2025.
(4)Interest at SOFR plus 1.45% (SOFR is capped at a rate of 4.15% through November 2024).
v3.24.2.u1
Fair Value Measurements (Tables)
6 Months Ended
Jun. 30, 2024
Fair Value Disclosures [Abstract]  
Schedule of Fair Value, Assets and Liabilities Measured on Recurring Basis
Financial assets measured at fair value on our consolidated balance sheet as of June 30, 2024 consist of interest rate derivatives, which are presented in the table below based on their level in the fair value hierarchy. There were no financial liabilities measured at fair value as of June 30, 2024.
 As of June 30, 2024
(Amounts in thousands)TotalLevel 1Level 2Level 3
Interest rate derivatives (included in other assets)$12,800 $— $12,800 $— 

Financial assets measured at fair value on our consolidated balance sheet as of December 31, 2023 consist of interest rate derivatives, which are presented in the table below based on their level in the fair value hierarchy. There were no financial liabilities measured at fair value as of December 31, 2023. 
 As of As of December 31, 2023
(Amounts in thousands)TotalLevel 1Level 2Level 3
Interest rate derivatives (included in other assets)$22,608 $— $22,608 $— 
Schedule of Interest Rate Derivatives The table below summarizes our interest rate derivatives, all of which hedge the interest rate risk attributable to the variable rate debt noted as of June 30, 2024 and December 31, 2023, respectively.
Fair Value as ofAs of June 30, 2024
(Amounts in thousands)June 30, 2024December 31, 2023Notional AmountSwapped RateExpiration Date
Interest rate swap related to:
731 Lexington Avenue mortgage loan, retail condominium$11,880 $16,315 $300,000 1.76%05/25
Interest rate caps related to:
Rego Park II shopping center mortgage loan920 1,370 202,544(1)11/24
731 Lexington Avenue mortgage loan, office condominium— 4,923 N/AN/AN/A
Included in other assets$12,800 $22,608 
(1)SOFR cap strike rate of 4.15%.
Schedule of Carrying Amount and Fair Value of Financial Instruments The table below summarizes the carrying amount and fair value of these financial instruments as of June 30, 2024 and December 31, 2023, respectively.
 As of June 30, 2024As of December 31, 2023
(Amounts in thousands)Carrying
Amount
Fair
Value
Carrying
Amount
Fair
Value
Assets:
Cash equivalents
$129,129 $129,129 $363,535 $363,535 
Liabilities:
Mortgages payable (excluding deferred debt issuance costs, net)$1,086,544 $1,066,388 $1,096,544 $1,071,887 
v3.24.2.u1
Earnings Per Share (Tables)
6 Months Ended
Jun. 30, 2024
Earnings Per Share [Abstract]  
Schedule of Earnings Per Share, Basic and Diluted
The following table sets forth the computation of basic and diluted income per share, including a reconciliation of net income and the number of shares used in computing basic and diluted income per share. Basic income per share is determined using the weighted average shares of common stock (including deferred stock units) outstanding during the period. Diluted income per share is determined using the weighted average shares of common stock (including deferred stock units) outstanding during the period, and assumes all potentially dilutive securities were converted into common shares at the earliest date possible. There were no potentially dilutive securities outstanding during the three and six months ended June 30, 2024 and 2023.
 For the Three Months Ended June 30,For the Six Months
Ended June 30,
(Amounts in thousands, except share and per share amounts)
2024202320242023
Net income $8,380 $64,147 $24,489 $75,373 
Weighted average shares outstanding – basic and diluted
5,131,902 5,128,823 5,131,290 5,127,959 
Net income per common share – basic and diluted$1.63 $12.51 $4.77 $14.70 
v3.24.2.u1
Organization (Details)
Jun. 30, 2024
property
Organization, Consolidation and Presentation of Financial Statements [Abstract]  
Number of properties 5
v3.24.2.u1
Basis of Presentation (Details)
6 Months Ended
Jun. 30, 2024
segment
Organization, Consolidation and Presentation of Financial Statements [Abstract]  
Number of reportable segments 1
v3.24.2.u1
Revenue Recognition - Schedule of Revenue (Details) - USD ($)
$ in Thousands
3 Months Ended 6 Months Ended
Jun. 30, 2024
Jun. 30, 2023
Jun. 30, 2024
Jun. 30, 2023
Disaggregation of Revenue [Line Items]        
Lease revenues $ 51,288 $ 51,512 $ 110,634 $ 102,548
Rental revenues 53,392 53,673 114,789 106,614
Parking revenue        
Disaggregation of Revenue [Line Items]        
Revenue from contract with customer 1,185 1,114 2,315 2,210
Tenant services        
Disaggregation of Revenue [Line Items]        
Revenue from contract with customer $ 919 $ 1,047 $ 1,840 $ 1,856
v3.24.2.u1
Revenue Recognition - Schedule of Components of Lease Revenue (Details) - USD ($)
$ in Thousands
3 Months Ended 6 Months Ended
Jun. 30, 2024
Jun. 30, 2023
Jun. 30, 2024
Jun. 30, 2023
Revenue from Contract with Customer [Abstract]        
Fixed lease revenues $ 34,400 $ 34,839 $ 76,934 $ 69,563
Variable lease revenues 16,888 16,673 33,700 32,985
Lease revenues $ 51,288 $ 51,512 $ 110,634 $ 102,548
v3.24.2.u1
Revenue Recognition - Additional Information (Details)
ft² in Thousands
3 Months Ended 6 Months Ended
May 03, 2024
USD ($)
ft²
Dec. 03, 2022
USD ($)
ft²
Jun. 30, 2024
USD ($)
Jun. 30, 2023
USD ($)
Jun. 30, 2024
USD ($)
Mar. 31, 2024
USD ($)
Jun. 30, 2023
USD ($)
Dec. 31, 2023
USD ($)
Disaggregation of Revenue [Line Items]                
Rental revenues     $ 53,392,000 $ 53,673,000 $ 114,789,000   $ 106,614,000  
Incentive from lessor     113,618,000   113,618,000     $ 0
Bloomberg | 731 Lexington Avenue Property                
Disaggregation of Revenue [Line Items]                
Area of property (in sqft.) | ft² 947              
Term 11 years              
Payments for lease commissions $ 32,000,000              
Incentive from lessor 113,618,000              
Deferred lease incentive asset     $ 113,618,000   113,618,000      
Bloomberg | 731 Lexington Avenue Property | Third Party Broker                
Disaggregation of Revenue [Line Items]                
Payments for lease commissions 26,500,000              
Bloomberg | 731 Lexington Avenue Property | Vornado                
Disaggregation of Revenue [Line Items]                
Payments for lease commissions $ 5,500,000              
IKEA | Rego Park 1 Property                
Disaggregation of Revenue [Line Items]                
Area of property (in sqft.) | ft²   112            
Payment for termination of lease   $ 10,000,000       $ 10,000,000    
Customer Concentration Risk | Revenue | Bloomberg                
Disaggregation of Revenue [Line Items]                
Rental revenues         $ 60,946,000   $ 59,177,000  
Percentage rent contributed by tenant         53.00%   56.00%  
v3.24.2.u1
Real Estate Sale (Details) - USD ($)
$ in Thousands
3 Months Ended 6 Months Ended
May 19, 2023
Jun. 30, 2024
Jun. 30, 2023
Jun. 30, 2024
Jun. 30, 2023
Real Estate [Line Items]          
Proceeds from sale of real estate       $ 0 $ 67,821
Net gain on sale of real estate   $ 0 $ 53,952 $ 0 $ 53,952
Rego Park III Land Parcel          
Real Estate [Line Items]          
Proceeds from sale of real estate $ 71,060        
Net proceeds from sale of land 67,821        
Net gain on sale of real estate $ 53,952        
v3.24.2.u1
Related Party Transactions - Additional Information (Details)
3 Months Ended 6 Months Ended
May 01, 2024
Jun. 30, 2024
USD ($)
Jun. 30, 2023
USD ($)
Jun. 30, 2024
USD ($)
$ / ft²
Jun. 30, 2023
USD ($)
Dec. 31, 2023
USD ($)
Related Party Transaction [Line Items]            
Fees to related party   $ 7,541,000 $ 3,090,000 $ 9,930,000 $ 5,240,000  
Property Management Fees            
Related Party Transaction [Line Items]            
Fees to related party   1,213,000 1,550,000 2,849,000 2,959,000  
Development fees            
Related Party Transaction [Line Items]            
Fees to related party   111,000 0 126,000 0  
Leasing fees            
Related Party Transaction [Line Items]            
Fees to related party   5,517,000 $ 129,000 5,555,000 $ 170,000  
Vornado            
Related Party Transaction [Line Items]            
Management fee agreement value       $ 2,800,000    
Vornado | Property Management Fees | Rego Park II | Retail Space            
Related Party Transaction [Line Items]            
Property management fee, percent fee       2.00%    
Vornado | Property Management Fees | 731 Lexington Avenue | Office and Retail Space            
Related Party Transaction [Line Items]            
Property management fee agreement, price per square foot | $ / ft²       0.50    
Vornado | Property Management Fees | 731 Lexington Avenue | Common Area            
Related Party Transaction [Line Items]            
Property management fee escalation percentage per annum       3.00%    
Vornado | Development fees            
Related Party Transaction [Line Items]            
Development fee as percentage of development costs       6.00%    
Vornado | Leasing fees            
Related Party Transaction [Line Items]            
Lease fee percentage of rent one to ten years       3.00%    
Lease fee percentage of rent eleven to twenty years       2.00%    
Lease fee percentage of rent twenty first to thirty years       1.00%    
Percentage increase lease fee if broker used       1.00%    
Percentage of third-party lease commission 33.00%          
Percentage commissions on sale of assets under fifty million       3.00%    
Asset sale commission threshold       $ 50,000,000    
Percentage commissions on sale of assets over fifty million       1.00%    
Related Party            
Related Party Transaction [Line Items]            
Other liabilities   623,000   $ 623,000   $ 715,000
Related Party | Management And Development Agreement, Base Management Fee | 731 Lexington Avenue | Common Area            
Related Party Transaction [Line Items]            
Fees to related party       376,000    
Related Party | Development fees            
Related Party Transaction [Line Items]            
Other liabilities   126,000   126,000    
Related Party | Leasing fees            
Related Party Transaction [Line Items]            
Other liabilities   17,000   17,000   69,000
Related Party | Management, property management, cleaning, engineering and security fees            
Related Party Transaction [Line Items]            
Other liabilities   $ 480,000   $ 480,000   $ 646,000
Alexander's Inc. | Vornado | Vornado            
Related Party Transaction [Line Items]            
Ownership percentage by noncontrolling owners   32.40%   32.40%    
v3.24.2.u1
Related Party Transactions - Schedule of Fees to Vornado (Details) - USD ($)
$ in Thousands
3 Months Ended 6 Months Ended
Jun. 30, 2024
Jun. 30, 2023
Jun. 30, 2024
Jun. 30, 2023
Related Party Transaction [Line Items]        
Fees to related party $ 7,541 $ 3,090 $ 9,930 $ 5,240
Company management fees        
Related Party Transaction [Line Items]        
Fees to related party 700 700 1,400 1,400
Development fees        
Related Party Transaction [Line Items]        
Fees to related party 111 0 126 0
Leasing fees        
Related Party Transaction [Line Items]        
Fees to related party 5,517 129 5,555 170
Commission On Sale Of Real Estate Member        
Related Party Transaction [Line Items]        
Fees to related party 0 711 0 711
Property management, cleaning, engineering, parking and security fees        
Related Party Transaction [Line Items]        
Fees to related party $ 1,213 $ 1,550 $ 2,849 $ 2,959
v3.24.2.u1
Mortgages Payable - Additional Information (Detail) - 731 Lexington Avenue - USD ($)
1 Months Ended
Jun. 30, 2024
Jun. 11, 2024
Jul. 15, 2023
Jun. 30, 2023
Jun. 09, 2023
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]          
Payments for derivative instrument       $ 11,258,000  
Mortgages          
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]          
Mortgage loans, extension option   4 months     1 year
Mortgage loans   $ 490,000,000     $ 500,000,000
Paydown   $ 10,000,000      
Escrow amount $ 66,808,000        
Mortgages | London Interbank Offered Rate          
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]          
Rate     0.90%    
Interest cap rate     6.00%    
Mortgages | Prime Rate          
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]          
Rate 8.50%        
Interest cap rate   6.00%      
v3.24.2.u1
Mortgages Payable - Schedule of Long -term Debt Instruments (Details) - USD ($)
$ in Thousands
6 Months Ended
Jun. 30, 2024
Dec. 31, 2023
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]    
Notes payable $ 1,082,012 $ 1,092,551
Mortgages    
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]    
Notes payable, gross 1,086,544 1,096,544
Deferred debt issuance costs, net of accumulated amortization of $18,583 and $17,639, respectively (4,532) (3,993)
Notes payable 1,082,012 1,092,551
Deferred debt issuance costs, accumulated amortization $ 18,583 17,639
Mortgages | 731 Lexington Avenue | Office Space    
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]    
Interest rate 8.50%  
Notes payable, gross $ 490,000 500,000
Mortgages | 731 Lexington Avenue | Retail Space    
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]    
Interest rate 1.76%  
Notes payable, gross $ 300,000 300,000
Rate 1.51%  
Swapped fixed rate 1.76%  
Mortgages | Rego Park II | Retail Space    
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]    
Interest rate 5.60%  
Notes payable, gross $ 202,544 202,544
Mortgages | Rego Park II | Retail Space | SOFR    
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]    
Rate 1.45%  
Mortgages | Rego Park II | Retail Space | SOFR capped rate    
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]    
Rate 4.15%  
Mortgages | The Alexander apartment tower | Apartment tower    
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]    
Interest rate 2.63%  
Notes payable, gross $ 94,000 $ 94,000
v3.24.2.u1
Stock-Based Compensation (Details) - Director - 2016 Omnibus Stock Plan - Deferred Stock Units - USD ($)
1 Months Ended
May 31, 2024
Jun. 30, 2024
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Non option equity instruments granted per director (in shares) 357  
Non option equity instruments market value $ 75,000  
Non option equity instruments grant date fair value per grant 56,250  
Non option equity instruments grant date fair value total $ 450,000  
Non option equity instruments, outstanding, number (in shares)   26,244
Shares available for future grant under the plan (in shares)   479,543
v3.24.2.u1
Fair Value Measurements - Schedule of Fair Value, Assets and Liabilities Measured on Recurring Basis (Details) - Recurring - USD ($)
$ in Thousands
Jun. 30, 2024
Dec. 31, 2023
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Interest rate derivatives (included in other assets) $ 12,800 $ 22,608
Level 1    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Interest rate derivatives (included in other assets) 0 0
Level 2    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Interest rate derivatives (included in other assets) 12,800 22,608
Level 3    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Interest rate derivatives (included in other assets) $ 0 $ 0
v3.24.2.u1
Fair Value Measurements - Schedule of Interest Rate Derivatives (Details) - USD ($)
$ in Thousands
Jun. 30, 2024
Dec. 31, 2023
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Included in other assets $ 12,800 $ 22,608
Interest rate swap | Designated as Hedging Instrument | 731 Lexington Avenue mortgage loan, retail condominium    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Included in other assets 11,880 16,315
Notional Amount $ 300,000  
Swapped Rate 1.76%  
Interest rate swap | Designated as Hedging Instrument | Rego Park II shopping center mortgage loan    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Included in other assets $ 920 1,370
Notional Amount $ 202,544  
Interest cap rate 4.15%  
Interest rate swap | Designated as Hedging Instrument | 731 Lexington Avenue mortgage loan, office condominium    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Included in other assets $ 0 $ 4,923
v3.24.2.u1
Fair Value Measurements - Schedule of Carrying Amount and Fair Value of Financial Instruments (Details) - USD ($)
$ in Thousands
Jun. 30, 2024
Dec. 31, 2023
Carrying Amount    
Assets:    
Cash equivalents $ 129,129 $ 363,535
Liabilities:    
Mortgages payable (excluding deferred debt issuance costs, net) 1,086,544 1,096,544
Level 1 | Fair Value    
Assets:    
Cash equivalents 129,129 363,535
Level 2 | Fair Value    
Liabilities:    
Mortgages payable (excluding deferred debt issuance costs, net) $ 1,066,388 $ 1,071,887
v3.24.2.u1
Commitments and Contingencies (Details)
6 Months Ended
Jun. 30, 2024
USD ($)
Loss Contingencies [Line Items]  
Standby letters of credit, outstanding $ 900,000
All Risk Property and Rental Value  
Loss Contingencies [Line Items]  
Insurance maximum coverage per incident 1,700,000,000
Terrorism Coverage Including NBCR  
Loss Contingencies [Line Items]  
Insurance maximum coverage per incident 1,700,000,000
Insurance maximum coverage in aggregate $ 1,700,000,000
NBCR  
Loss Contingencies [Line Items]  
Federal government responsibility (in percentage) 80.00%
NBCR | FNSIC  
Loss Contingencies [Line Items]  
Insurance deductible $ 316,000
Self insured responsibility (in percentage) 20.00%
General Liability  
Loss Contingencies [Line Items]  
Insurance maximum coverage per property $ 300,000,000
Insurance maximum coverage per incident 300,000,000
Disease Coverage  
Loss Contingencies [Line Items]  
Insurance maximum coverage per incident $ 30,000,000
v3.24.2.u1
Earnings Per Share - Additional Information (Details) - shares
3 Months Ended 6 Months Ended
Jun. 30, 2024
Jun. 30, 2023
Jun. 30, 2024
Jun. 30, 2023
Earnings Per Share [Abstract]        
Potentially dilutive securities outstanding (in shares) 0 0 0 0
v3.24.2.u1
Earnings Per Share - Schedule of Earnings Per Share, Basic and Diluted (Details) - USD ($)
$ / shares in Units, $ in Thousands
3 Months Ended 6 Months Ended
Jun. 30, 2024
Jun. 30, 2023
Jun. 30, 2024
Jun. 30, 2023
Earnings Per Share [Abstract]        
Net income $ 8,380 $ 64,147 $ 24,489 $ 75,373
Weighted average shares outstanding - basic (in shares) 5,131,902 5,128,823 5,131,290 5,127,959
Weighted average shares outstanding - diluted (in shares) 5,131,902 5,128,823 5,131,290 5,127,959
Net income per common share - basic (in usd per share) $ 1.63 $ 12.51 $ 4.77 $ 14.70
Net income per common share - diluted (in usd per share) $ 1.63 $ 12.51 $ 4.77 $ 14.70

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