ALEXANDERS INC, 10-Q filed on July 31, 2023
v3.23.2
Cover
6 Months Ended
Jun. 30, 2023
shares
Cover [Abstract]  
Document Type 10-Q
Document Quarterly Report true
Document Period End Date Jun. 30, 2023
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, $1 par value per share
Trading Symbol ALX
Security Exchange Name NYSE
Entity Current Reporting Status Yes
Entity Interactive Data Current Yes
Entity Filer Category Accelerated Filer
Entity Small Business false
Entity Emerging Growth Company false
Entity Shell Company false
Entity Common Stock, Shares Outstanding 5,107,290
Amendment Flag false
Document Fiscal Year Focus 2023
Document Fiscal Period Focus Q2
Entity Central Index Key 0000003499
Current Fiscal Year End Date --12-31
v3.23.2
Consolidated Balance Sheets - USD ($)
$ in Thousands
Jun. 30, 2023
Dec. 31, 2022
Real estate, at cost:    
Land $ 32,271 $ 33,050
Buildings and leasehold improvements 1,035,444 1,029,504
Development and construction in progress 0 22,044
Total 1,067,715 1,084,598
Accumulated depreciation and amortization (405,268) (396,268)
Real estate, net 662,447 688,330
Cash and cash equivalents 531,331 194,933
Restricted cash 21,424 19,545
Investments in U.S. Treasury bills 0 266,963
Tenant and other receivables 5,371 4,705
Receivable arising from the straight-lining of rents 123,328 127,497
Deferred leasing costs, net, including unamortized leasing fees to Vornado of $20,704 and $22,174, respectively 26,481 28,490
Other assets 58,043 67,313
Total assets 1,428,425 1,397,776
LIABILITIES AND EQUITY    
Mortgages payable, net of deferred debt issuance costs 1,091,787 1,091,051
Amounts due to Vornado 952 801
Accounts payable and accrued expenses 49,223 48,785
Other liabilities 20,819 20,640
Total liabilities 1,162,781 1,161,277
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 34,315 33,865
Retained earnings 201,472 172,243
Accumulated other comprehensive income 25,052 25,586
Equity before treasury stock 266,012 236,867
Treasury stock: 66,160 shares, at cost (368) (368)
Total equity 265,644 236,499
Total liabilities and equity $ 1,428,425 $ 1,397,776
v3.23.2
Consolidated Balance Sheets (Parenthetical) - USD ($)
$ in Thousands
Jun. 30, 2023
Dec. 31, 2022
Statement of Financial Position [Abstract]    
Unamortized leasing fees to Vornado $ 20,704 $ 22,174
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
v3.23.2
Consolidated Statements of Income - USD ($)
$ in Thousands
3 Months Ended 6 Months Ended
Jun. 30, 2023
Jun. 30, 2022
Jun. 30, 2023
Jun. 30, 2022
REVENUES        
Rental revenues $ 53,673 $ 49,824 $ 106,614 $ 99,039
EXPENSES        
Operating, including fees to Vornado of $1,684, $1,536, $3,223 and $2,914, respectively (24,818) (21,372) (49,762) (42,914)
Depreciation and amortization (8,081) (7,413) (15,559) (14,764)
General and administrative, including management fees to Vornado of $610, $610, $1,220 and $1,220, respectively (1,906) (1,916) (3,265) (3,385)
Total expenses (34,805) (30,701) (68,586) (61,063)
Interest and other income 4,523 1,173 8,842 1,267
Interest and debt expense (13,196) (5,482) (25,449) (9,897)
Net gain on sale of real estate 53,952 0 53,952 0
Net income $ 64,147 $ 14,814 $ 75,373 $ 29,346
Net income per common share - basic (in usd per share) $ 12.51 $ 2.89 $ 14.70 $ 5.73
Net income per common share - diluted (in usd per share) $ 12.51 $ 2.89 $ 14.70 $ 5.73
Weighted average shares outstanding - basic (in shares) 5,128,823 5,125,710 5,127,959 5,125,098
Weighted average shares outstanding - diluted (in shares) 5,128,823 5,125,710 5,127,959 5,125,098
v3.23.2
Consolidated Statements of Income (Parenthetical) - Related Party - USD ($)
$ in Thousands
3 Months Ended 6 Months Ended
Jun. 30, 2023
Jun. 30, 2022
Jun. 30, 2023
Jun. 30, 2022
Operating fees to Vornado $ 1,684 $ 1,536 $ 3,223 $ 2,914
Management fees to Vornado $ 610 $ 610 $ 1,220 $ 1,220
v3.23.2
Consolidated Statements of Comprehensive Income - USD ($)
$ in Thousands
3 Months Ended 6 Months Ended
Jun. 30, 2023
Jun. 30, 2022
Jun. 30, 2023
Jun. 30, 2022
Statement of Comprehensive Income [Abstract]        
Net income $ 64,147 $ 14,814 $ 75,373 $ 29,346
Other comprehensive income (loss):        
Change in fair value of interest rate derivatives and other 3,110 1,924 (534) 13,651
Comprehensive income $ 67,257 $ 16,738 $ 74,839 $ 42,997
v3.23.2
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, 2021   5,173,000        
Beginning balance at Dec. 31, 2021 $ 252,589 $ 5,173 $ 33,415 $ 206,875 $ 7,494 $ (368)
Increase (Decrease) in Stockholders' Equity [Roll Forward]            
Net income 29,346     29,346    
Dividends paid (46,120)     (46,120)    
Change in fair value of interest rate derivatives and other 13,651       13,651  
Deferred stock unit grants 450   450      
Ending balance (in shares) at Jun. 30, 2022   5,173,000        
Ending balance at Jun. 30, 2022 249,916 $ 5,173 33,865 190,101 21,145 (368)
Beginning balance (in shares) at Mar. 31, 2022   5,173,000        
Beginning balance at Mar. 31, 2022 255,788 $ 5,173 33,415 198,347 19,221 (368)
Increase (Decrease) in Stockholders' Equity [Roll Forward]            
Net income 14,814     14,814    
Dividends paid (23,060)     (23,060)    
Change in fair value of interest rate derivatives and other 1,924       1,924  
Deferred stock unit grants 450   450      
Ending balance (in shares) at Jun. 30, 2022   5,173,000        
Ending balance at Jun. 30, 2022 $ 249,916 $ 5,173 33,865 190,101 21,145 (368)
Beginning balance (in shares) at Dec. 31, 2022 5,173,450 5,173,000        
Beginning balance 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 5,173,450 5,173,000        
Ending balance 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 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 5,173,450 5,173,000        
Ending balance at Jun. 30, 2023 $ 265,644 $ 5,173 $ 34,315 $ 201,472 $ 25,052 $ (368)
v3.23.2
Consolidated Statements of Changes in Equity (Parenthetical) - $ / shares
3 Months Ended 6 Months Ended
Jun. 30, 2023
Jun. 30, 2022
Jun. 30, 2023
Jun. 30, 2022
Statement of Stockholders' Equity [Abstract]        
Dividends per common share (in usd per share) $ 4.50 $ 4.50 $ 9.00 $ 9.00
v3.23.2
Consolidated Statements of Cash Flows - USD ($)
$ in Thousands
6 Months Ended
Jun. 30, 2023
Jun. 30, 2022
CASH FLOWS FROM OPERATING ACTIVITIES    
Net income $ 75,373 $ 29,346
Adjustments to reconcile net income to net cash provided by operating activities:    
Depreciation and amortization, including amortization of debt issuance costs 16,399 15,587
Net gain on sale of real estate (53,952) 0
Straight-lining of rents 4,169 3,948
Stock-based compensation expense 450 450
Other non-cash adjustments 4,431 (611)
Change in operating assets and liabilities:    
Tenant and other receivables (666) 1,978
Other assets 17,666 23,699
Amounts due to Vornado 151 38
Accounts payable and accrued expenses 1,900 18,727
Other liabilities (12) 166
Net cash provided by operating activities 65,909 93,328
CASH FLOWS FROM INVESTING ACTIVITIES    
Construction in progress and real estate additions (2,894) (3,800)
Proceeds from sale of real estate 67,821 0
Proceeds from maturities of U.S. Treasury bills 264,881 0
Purchase of interest rate cap (11,258) 0
Purchase of U.S. Treasury bills 0 (197,407)
Net cash provided by (used in) investing activities 318,550 (201,207)
CASH FLOWS FROM FINANCING ACTIVITIES    
Dividends paid (46,144) (46,120)
Debt issuance costs (38) (8)
Net cash used in financing activities (46,182) (46,128)
Net increase (decrease) in cash and cash equivalents and restricted cash 338,277 (154,007)
Cash and cash equivalents and restricted cash at beginning of period 214,478 483,505
Cash and cash equivalents and restricted cash at end of period 552,755 329,498
RECONCILIATION OF CASH AND CASH EQUIVALENTS AND RESTRICTED CASH    
Cash and cash equivalents at beginning of period 194,933 463,539
Restricted cash at beginning of period 19,545 19,966
Cash and cash equivalents and restricted cash at beginning of period 214,478 483,505
Cash and cash equivalents at end of period 531,331 310,349
Restricted cash at end of period 21,424 19,149
Cash and cash equivalents and restricted cash at end of period 552,755 329,498
SUPPLEMENTAL DISCLOSURE OF CASH FLOW INFORMATION    
Cash payments for interest (net of amounts capitalized) 23,761 8,540
NON-CASH TRANSACTIONS    
Liability for real estate additions, including $3 for development fees due to Vornado in 2022 798 1,426
Write-off of fully depreciated assets $ 5,808 $ 23
v3.23.2
Consolidated Statements of Cash Flows (Parenthetical)
$ in Thousands
6 Months Ended
Jun. 30, 2022
USD ($)
Liability for real estate additions due to Vornado $ 1,426
Development fees | Vornado  
Liability for real estate additions due to Vornado $ 3
v3.23.2
Organization
6 Months Ended
Jun. 30, 2023
Organization, Consolidation and Presentation of Financial Statements [Abstract]  
Organization OrganizationAlexander’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.
v3.23.2
Basis of Presentation
6 Months Ended
Jun. 30, 2023
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, 2022, 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, 2023 are not necessarily indicative of the operating results for the full year.
We operate in one reportable segment.
v3.23.2
Recently Issued Accounting Literature
6 Months Ended
Jun. 30, 2023
Accounting Standards Update and Change in Accounting Principle [Abstract]  
Recently Issued Accounting Literature Recently Issued Accounting LiteratureIn March 2020, the Financial Accounting Standards Board (“FASB”) issued Accounting Standards Update (“ASU”) 2020-04 establishing Accounting Standards Codification (“ASC”) Topic 848, Reference Rate Reform, and in January 2021, the FASB issued ASU 2021-01, Reference Rate Reform (Topic 848): Scope (collectively, “ASC 848”). ASC 848 contains practical expedients for reference rate reform related activities that impact debt, leases, derivatives and other contracts. The guidance in ASC 848 is optional and may be elected over time as reference rate reform activities occur. We have 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. In December 2022, the FASB issued ASU 2022-06, Deferral of the Sunset Date of Topic 848 (“ASU 2022-06”) which was issued to defer the sunset date of ASC 848 to December 31, 2024. ASU 2022-06 is effective immediately for all companies. As of June 30, 2023, we have transitioned all of our LIBOR-indexed debt and derivatives and, for our derivatives in hedge accounting relationships, utilized the elective relief in ASC 848, allowing for the continuation of hedge accounting through the transition process.
v3.23.2
Revenue Recognition
6 Months Ended
Jun. 30, 2023
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, 2023 and 2022.
For the Three Months Ended June 30,For the Six Months Ended June 30,
(Amounts in thousands)2023202220232022
Lease revenues$51,512 $47,711 $102,548 $94,519 
Parking revenue1,114 1,165 2,210 2,393 
Tenant services1,047 948 1,856 2,127 
Rental revenues$53,673 $49,824 $106,614 $99,039 


The components of lease revenues for the three and six months ended June 30, 2023 and 2022 are as follows:
For the Three Months Ended June 30,For the Six Months Ended June 30,
(Amounts in thousands)2023202220232022
Fixed lease revenues$34,839 $33,418 $69,563 $65,621 
Variable lease revenues16,673 14,293 32,985 28,898 
Lease revenues$51,512 $47,711 $102,548 $94,519 

Bloomberg L.P. (“Bloomberg”) accounted for revenue of $59,177,000 and $55,909,000 for the six months ended June 30, 2023 and 2022, respectively, representing approximately 56% of our rental revenues in each period. 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.
v3.23.2
Real Estate Sale
6 Months Ended
Jun. 30, 2023
Real Estate [Abstract]  
Real Estate Sale Real Estate SaleOn 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
v3.23.2
Related Party Transactions
6 Months Ended
Jun. 30, 2023
Related Party Transactions [Abstract]  
Related Party Transactions Related Party Transactions
Vornado
As of June 30, 2023, 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) $365,000, 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. In the event third-party real estate brokers are used, the fees to Vornado increase by 1% and Vornado is responsible for the fees to the third-party real estate brokers.
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 (the “Sales Agreement”). Pursuant to the Sales Agreement, we paid a $711,000 sales commission to Vornado in the second quarter of 2023 related to the sale of the Rego Park III land parcel.
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.
The following is a summary of fees incurred to Vornado under the various agreements discussed above.
 For the Three Months Ended June 30,For the Six Months Ended June 30,
(Amounts in thousands)2023202220232022
Company management fees$700 $700 $1,400 $1,400 
Development fees— — — 
Leasing fees129 — 170 1,318 
Commission on sale of real estate711 — 711 — 
Property management, cleaning, engineering and security fees
1,550 1,547 2,959 2,816 
$3,090 $2,247 $5,240 $5,537 
As of June 30, 2023, the amounts due to Vornado were $823,000 for management, property management, cleaning, engineering and security fees and $129,000 for leasing fees. As of December 31, 2022, the amounts due to Vornado were $742,000 for management, property management, cleaning, engineering and security fees and $59,000 for leasing fees.
v3.23.2
Mortgages Payable
6 Months Ended
Jun. 30, 2023
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 is 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 (8.25% as of June 30, 2023) at 6.00% through loan maturity.
The following is a summary of our outstanding mortgages payable as of June 30, 2023 and December 31, 2022. We may refinance our maturing debt as it comes due or choose to pay it down.
  Interest Rate at June 30, 2023Balance as of
(Amounts in thousands)MaturityJune 30, 2023December 31, 2022
First mortgages secured by:
731 Lexington Avenue, office condominium(1)(2)
Jun. 11, 20246.09%$500,000 $500,000 
731 Lexington Avenue, retail condominium(1)(3)
Aug. 05, 20251.76%300,000 300,000 
Rego Park II shopping center(1)(4)
Dec. 12, 20255.60%202,544 202,544 
The Alexander apartment towerNov. 01, 20272.63%94,000 94,000 
Total1,096,544 1,096,544 
Deferred debt issuance costs, net of accumulated
   amortization of $16,842 and $16,071, respectively
(4,757)(5,493)
$1,091,787 $1,091,051 
(1)Interest rate listed represents the rate in effect as of June 30, 2023 based on LIBOR or SOFR as of contractual reset date plus contractual spread, adjusted for hedging instruments as applicable.
(2)Interest at LIBOR plus 0.90% through July 15, 2023 (LIBOR was capped at 6.00% through July 15, 2023) and then at the Prime Rate (capped at 6.00% through loan maturity).
(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 4.15% through November 2024).
v3.23.2
Stock-Based Compensation
6 Months Ended
Jun. 30, 2023
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 2023, we granted each of the members of our Board of Directors 449 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, 2023, there were 23,388 DSUs outstanding and 482,399 shares were available for future grant under the Plan.
v3.23.2
Fair Value Measurements
6 Months Ended
Jun. 30, 2023
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 as well as certain U.S. Treasury securities 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, 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 June 30, 2023.
 As of June 30, 2023
(Amounts in thousands)TotalLevel 1Level 2Level 3
Interest rate derivatives (included in other assets)$38,407 $— $38,407 $— 
Financial assets measured at fair value on our consolidated balance sheet as of December 31, 2022 consist of U.S. Treasury bills (classified as available-for-sale) and 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, 2022.
 As of December 31, 2022
(Amounts in thousands)TotalLevel 1Level 2Level 3
Investments in U.S. Treasury bills$266,963 $266,963 $— $— 
Interest rate derivatives (included in other assets)29,351 — 29,351 — 
$296,314 $266,963 $29,351 $— 
9.Fair Value Measurements - continued
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, 2023 and December 31, 2022, respectively.
Fair Value as ofAs of June 30, 2023
(Amounts in thousands)June 30, 2023December 31, 2022Notional AmountSwapped RateExpiration Date
Interest rate swap related to:
731 Lexington Avenue mortgage loan, retail condominium$24,189 $26,718 $300,000 1.76%05/25
Interest rate caps related to:
Rego Park II shopping center mortgage loan3,106 2,622 202,544 (1)11/24
731 Lexington Avenue mortgage loan, office condominium11,112 11 500,000 (2)06/24
Included in other assets$38,407 $29,351 
(1)SOFR cap strike rate of 4.15%.
(2)In June 2023, we purchased an interest rate cap for $11,258, which capped LIBOR at 6.00% through July 15, 2023 and then the Prime Rate (8.25% as of June 30, 2023) at 6.00% through loan maturity. See Note 7 - Mortgages Payable for further information.
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, 2023 and December 31, 2022.

 As of June 30, 2023As of December 31, 2022
(Amounts in thousands)Carrying
Amount
Fair
Value
Carrying
Amount
Fair
Value
Assets:
Cash equivalents
$366,143 $366,143 $47,852 $47,852 
Liabilities:
Mortgages payable (excluding deferred debt issuance costs, net)$1,096,544 $1,054,151 $1,096,544 $1,061,221 
v3.23.2
Commitments and Contingencies
6 Months Ended
Jun. 30, 2023
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 $298,000 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.
The principal amounts of our mortgage loans are non-recourse to us and the 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, 2023.
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.
v3.23.2
Earnings Per Share
6 Months Ended
Jun. 30, 2023
Earnings Per Share [Abstract]  
Earnings Per Share Earnings Per ShareThe 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, 2023 and 2022.     
 For the Three Months Ended June 30,For the Six Months Ended June 30,
(Amounts in thousands, except share and per share amounts)
2023202220232022
Net income $64,147 $14,814 $75,373 $29,346 
Weighted average shares outstanding – basic and diluted
5,128,823 5,125,710 5,127,959 5,125,098 
Net income per common share – basic and diluted$12.51 $2.89 $14.70 $5.73 
v3.23.2
Basis of Presentation (Policies)
6 Months Ended
Jun. 30, 2023
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, 2022, 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, 2023 are not necessarily indicative of the operating results for the full year.
We operate in one reportable segment.
Recently Issued Accounting Literature In March 2020, the Financial Accounting Standards Board (“FASB”) issued Accounting Standards Update (“ASU”) 2020-04 establishing Accounting Standards Codification (“ASC”) Topic 848, Reference Rate Reform, and in January 2021, the FASB issued ASU 2021-01, Reference Rate Reform (Topic 848): Scope (collectively, “ASC 848”). ASC 848 contains practical expedients for reference rate reform related activities that impact debt, leases, derivatives and other contracts. The guidance in ASC 848 is optional and may be elected over time as reference rate reform activities occur. We have 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. In December 2022, the FASB issued ASU 2022-06, Deferral of the Sunset Date of Topic 848 (“ASU 2022-06”) which was issued to defer the sunset date of ASC 848 to December 31, 2024. ASU 2022-06 is effective immediately for all companies. As of June 30, 2023, we have transitioned all of our LIBOR-indexed debt and derivatives and, for our derivatives in hedge accounting relationships, utilized the elective relief in ASC 848, allowing for the continuation of hedge accounting through the transition process.
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.
Fair Value Measurement 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 as well as certain U.S. Treasury securities 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.
v3.23.2
Revenue Recognition (Tables)
6 Months Ended
Jun. 30, 2023
Revenue from Contract with Customer [Abstract]  
Schedule of Disaggregation of Revenue
The following is a summary of revenue sources for the three and six months ended June 30, 2023 and 2022.
For the Three Months Ended June 30,For the Six Months Ended June 30,
(Amounts in thousands)2023202220232022
Lease revenues$51,512 $47,711 $102,548 $94,519 
Parking revenue1,114 1,165 2,210 2,393 
Tenant services1,047 948 1,856 2,127 
Rental revenues$53,673 $49,824 $106,614 $99,039 
Schedule of Components of Lease Revenue
The components of lease revenues for the three and six months ended June 30, 2023 and 2022 are as follows:
For the Three Months Ended June 30,For the Six Months Ended June 30,
(Amounts in thousands)2023202220232022
Fixed lease revenues$34,839 $33,418 $69,563 $65,621 
Variable lease revenues16,673 14,293 32,985 28,898 
Lease revenues$51,512 $47,711 $102,548 $94,519 
v3.23.2
Related Party Transactions (Tables)
6 Months Ended
Jun. 30, 2023
Related Party Transactions [Abstract]  
Summary of Fees to Vornado
The following is a summary of fees incurred to Vornado under the various agreements discussed above.
 For the Three Months Ended June 30,For the Six Months Ended June 30,
(Amounts in thousands)2023202220232022
Company management fees$700 $700 $1,400 $1,400 
Development fees— — — 
Leasing fees129 — 170 1,318 
Commission on sale of real estate711 — 711 — 
Property management, cleaning, engineering and security fees
1,550 1,547 2,959 2,816 
$3,090 $2,247 $5,240 $5,537 
v3.23.2
Mortgages Payable (Tables)
6 Months Ended
Jun. 30, 2023
Debt Disclosure [Abstract]  
Schedule of Long-term Debt Instruments
The following is a summary of our outstanding mortgages payable as of June 30, 2023 and December 31, 2022. We may refinance our maturing debt as it comes due or choose to pay it down.
  Interest Rate at June 30, 2023Balance as of
(Amounts in thousands)MaturityJune 30, 2023December 31, 2022
First mortgages secured by:
731 Lexington Avenue, office condominium(1)(2)
Jun. 11, 20246.09%$500,000 $500,000 
731 Lexington Avenue, retail condominium(1)(3)
Aug. 05, 20251.76%300,000 300,000 
Rego Park II shopping center(1)(4)
Dec. 12, 20255.60%202,544 202,544 
The Alexander apartment towerNov. 01, 20272.63%94,000 94,000 
Total1,096,544 1,096,544 
Deferred debt issuance costs, net of accumulated
   amortization of $16,842 and $16,071, respectively
(4,757)(5,493)
$1,091,787 $1,091,051 
(1)Interest rate listed represents the rate in effect as of June 30, 2023 based on LIBOR or SOFR as of contractual reset date plus contractual spread, adjusted for hedging instruments as applicable.
(2)Interest at LIBOR plus 0.90% through July 15, 2023 (LIBOR was capped at 6.00% through July 15, 2023) and then at the Prime Rate (capped at 6.00% through loan maturity).
(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 4.15% through November 2024).
v3.23.2
Fair Value Measurements (Tables)
6 Months Ended
Jun. 30, 2023
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, 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 June 30, 2023.
 As of June 30, 2023
(Amounts in thousands)TotalLevel 1Level 2Level 3
Interest rate derivatives (included in other assets)$38,407 $— $38,407 $— 
Financial assets measured at fair value on our consolidated balance sheet as of December 31, 2022 consist of U.S. Treasury bills (classified as available-for-sale) and 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, 2022.
 As of December 31, 2022
(Amounts in thousands)TotalLevel 1Level 2Level 3
Investments in U.S. Treasury bills$266,963 $266,963 $— $— 
Interest rate derivatives (included in other assets)29,351 — 29,351 — 
$296,314 $266,963 $29,351 $— 
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, 2023 and December 31, 2022, respectively.
Fair Value as ofAs of June 30, 2023
(Amounts in thousands)June 30, 2023December 31, 2022Notional AmountSwapped RateExpiration Date
Interest rate swap related to:
731 Lexington Avenue mortgage loan, retail condominium$24,189 $26,718 $300,000 1.76%05/25
Interest rate caps related to:
Rego Park II shopping center mortgage loan3,106 2,622 202,544 (1)11/24
731 Lexington Avenue mortgage loan, office condominium11,112 11 500,000 (2)06/24
Included in other assets$38,407 $29,351 
(1)SOFR cap strike rate of 4.15%.
(2)In June 2023, we purchased an interest rate cap for $11,258, which capped LIBOR at 6.00% through July 15, 2023 and then the Prime Rate (8.25% as of June 30, 2023) at 6.00% through loan maturity. See Note 7 - Mortgages Payable for further information.
Schedule of Fair Value, by Balance Sheet Grouping The table below summarizes the carrying amount and fair value of these financial instruments as of June 30, 2023 and December 31, 2022.
 As of June 30, 2023As of December 31, 2022
(Amounts in thousands)Carrying
Amount
Fair
Value
Carrying
Amount
Fair
Value
Assets:
Cash equivalents
$366,143 $366,143 $47,852 $47,852 
Liabilities:
Mortgages payable (excluding deferred debt issuance costs, net)$1,096,544 $1,054,151 $1,096,544 $1,061,221 
v3.23.2
Earnings Per Share (Tables)
6 Months Ended
Jun. 30, 2023
Earnings Per Share [Abstract]  
Schedule of Earnings Per Share, Basic and Diluted There were no potentially dilutive securities outstanding during the three and six months ended June 30, 2023 and 2022.     
 For the Three Months Ended June 30,For the Six Months Ended June 30,
(Amounts in thousands, except share and per share amounts)
2023202220232022
Net income $64,147 $14,814 $75,373 $29,346 
Weighted average shares outstanding – basic and diluted
5,128,823 5,125,710 5,127,959 5,125,098 
Net income per common share – basic and diluted$12.51 $2.89 $14.70 $5.73 
v3.23.2
Organization - Additional Information (Detail)
Jun. 30, 2023
property
Organization, Consolidation and Presentation of Financial Statements [Abstract]  
Number of properties 5
v3.23.2
Basis of Presentation - Additional Information (Detail)
6 Months Ended
Jun. 30, 2023
segment
Organization, Consolidation and Presentation of Financial Statements [Abstract]  
Number of reportable segments 1
v3.23.2
Revenue Recognition - Disaggregation of Revenue (Details) - USD ($)
$ in Thousands
3 Months Ended 6 Months Ended
Jun. 30, 2023
Jun. 30, 2022
Jun. 30, 2023
Jun. 30, 2022
Disaggregation of Revenue [Line Items]        
Lease revenues $ 51,512 $ 47,711 $ 102,548 $ 94,519
Rental revenues 53,673 49,824 106,614 99,039
Parking revenue        
Disaggregation of Revenue [Line Items]        
Revenue from contract with customer 1,114 1,165 2,210 2,393
Tenant services        
Disaggregation of Revenue [Line Items]        
Revenue from contract with customer $ 1,047 $ 948 $ 1,856 $ 2,127
v3.23.2
Revenue Recognition - Components of Lease Revenue (Details) - USD ($)
$ in Thousands
3 Months Ended 6 Months Ended
Jun. 30, 2023
Jun. 30, 2022
Jun. 30, 2023
Jun. 30, 2022
Revenue from Contract with Customer [Abstract]        
Fixed lease revenues $ 34,839 $ 33,418 $ 69,563 $ 65,621
Variable lease revenues 16,673 14,293 32,985 28,898
Lease revenues $ 51,512 $ 47,711 $ 102,548 $ 94,519
v3.23.2
Revenue Recognition - Narrative (Details) - USD ($)
$ in Thousands
3 Months Ended 6 Months Ended
Jun. 30, 2023
Jun. 30, 2022
Jun. 30, 2023
Jun. 30, 2022
Disaggregation of Revenue [Line Items]        
Rental revenues $ 53,673 $ 49,824 $ 106,614 $ 99,039
Customer Concentration Risk | Revenue | Bloomberg        
Disaggregation of Revenue [Line Items]        
Rental revenues     $ 59,177 $ 55,909
Percentage rent contributed by tenant     56.00% 56.00%
v3.23.2
Real Estate Sale - Narrative (Details) - USD ($)
$ in Thousands
3 Months Ended 6 Months Ended
May 19, 2023
Jun. 30, 2023
Jun. 30, 2022
Jun. 30, 2023
Jun. 30, 2022
Real Estate [Line Items]          
Proceeds from sale of real estate       $ 67,821 $ 0
Net gain on sale of real estate   $ 53,952 $ 0 $ 53,952 $ 0
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        
v3.23.2
Related Party Transactions - Additional Information (Detail)
3 Months Ended 6 Months Ended
Jun. 30, 2023
USD ($)
Jun. 30, 2022
USD ($)
Jun. 30, 2023
USD ($)
$ / ft²
Jun. 30, 2022
USD ($)
Dec. 31, 2022
USD ($)
Related Party Transaction [Line Items]          
Related party transaction, amounts of transaction $ 3,090,000 $ 2,247,000 $ 5,240,000 $ 5,537,000  
Amounts due to Vornado 952,000   952,000   $ 801,000
Management And Development Agreement, Base Management Fee | 731 Lexington Avenue | Common Area          
Related Party Transaction [Line Items]          
Related party transaction, amounts of transaction     $ 365,000    
Leasing and Other Agreements, Percentage of Gross Proceeds Used for Commission for Sales Less Than Fifty Million          
Related Party Transaction [Line Items]          
Related party transaction, rate     3.00%    
Asset sale commission threshold     $ 50,000,000    
Leasing and Other Agreements, Percentage of Gross Proceeds Used For Commission for Sales Greater Than Fifty Million          
Related Party Transaction [Line Items]          
Related party transaction, rate     1.00%    
Asset sale commission threshold     $ 50,000,000    
Leasing fees          
Related Party Transaction [Line Items]          
Related party transaction, amounts of transaction 129,000 $ 0 170,000 $ 1,318,000  
Related Party | Rego Park III Land Parcel          
Related Party Transaction [Line Items]          
Payments for commissions 711,000        
Related Party | Management and Development Agreement          
Related Party Transaction [Line Items]          
Annual management fee     $ 2,800,000    
Related Party | Management and Development Agreement | 731 Lexington Avenue | Office and Retail Space          
Related Party Transaction [Line Items]          
Property management fee agreement, price per square foot | $ / ft²     0.50    
Related Party | Management and Development Agreement, Percentage of Gross Revenue | Rego Park II | Retail Space          
Related Party Transaction [Line Items]          
Property management fee agreement percentage of annual escalation     2.00%    
Related Party | Management and Development Agreement, Annualized Management Fee | 731 Lexington Avenue | Common Area          
Related Party Transaction [Line Items]          
Property management fee agreement percentage of annual escalation     3.00%    
Related Party | Management and Development Agreement, Development Fee          
Related Party Transaction [Line Items]          
Property management fee agreement percentage of annual escalation     6.00%    
Related Party | Leasing and Other Agreements, Percentage of Rent for First Ten Years          
Related Party Transaction [Line Items]          
Service fees, rate     3.00%    
Related Party | Leasing and Other Agreements, Percentage of Rent for Eleventh Through Twentieth Year          
Related Party Transaction [Line Items]          
Service fees, rate     2.00%    
Related Party | Leasing and Other Agreements, Percentage of Rent for the Twenty-First Through the Thirtieth Year          
Related Party Transaction [Line Items]          
Service fees, rate     1.00%    
Related Party | Leasing and Other Agreements, Percentage Increase in Fee if Third Party is Used          
Related Party Transaction [Line Items]          
Service fees, rate     1.00%    
Related Party | Management, property management, cleaning, engineering and security fees          
Related Party Transaction [Line Items]          
Amounts due to Vornado 823,000   $ 823,000   742,000
Related Party | Leasing fees          
Related Party Transaction [Line Items]          
Amounts due to Vornado $ 129,000   $ 129,000   $ 59,000
Vornado | Alexander's Inc. | Related Party          
Related Party Transaction [Line Items]          
Ownership percentage by noncontrolling owners 32.40%   32.40%    
v3.23.2
Related Party Transactions - Summary of Fees to Vornado (Detail) - USD ($)
$ in Thousands
3 Months Ended 6 Months Ended
Jun. 30, 2023
Jun. 30, 2022
Jun. 30, 2023
Jun. 30, 2022
Related Party Transaction [Line Items]        
Fees to related party $ 3,090 $ 2,247 $ 5,240 $ 5,537
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 0 0 0 3
Leasing fees        
Related Party Transaction [Line Items]        
Fees to related party 129 0 170 1,318
Commission on sale of real estate        
Related Party Transaction [Line Items]        
Fees to related party 711 0 711 0
Property management, cleaning, engineering and security fees        
Related Party Transaction [Line Items]        
Fees to related party $ 1,550 $ 1,547 $ 2,959 $ 2,816
v3.23.2
Mortgages Payable - Additional Information (Detail) - USD ($)
$ in Thousands
6 Months Ended
Jun. 09, 2023
Jun. 30, 2023
Jul. 16, 2023
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]      
Payments for derivative instrument   $ 11,258  
LIBOR | Interest rate swap      
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]      
Basis spread over LIBOR 0.90%    
Mortgages      
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]      
Payments for derivative instrument   $ 11,258  
Mortgages | LIBOR      
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]      
Interest cap rate   6.00%  
Mortgages | LIBOR | Subsequent Event      
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]      
Interest cap rate     6.00%
Mortgages | Prime Rate      
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]      
Interest rate   8.25%  
731 Lexington Avenue | Mortgages      
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]      
Mortgage loans, extension option 1 year    
Mortgage loans $ 500,000    
v3.23.2
Mortgages Payable - Schedule of Long-term Debt Instruments (Detail) - USD ($)
$ in Thousands
6 Months Ended
Jun. 30, 2023
Dec. 31, 2022
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]    
Notes payable $ 1,091,787 $ 1,091,051
Mortgages    
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]    
Mortgage payable gross 1,096,544 1,096,544
Deferred debt issuance costs, net of accumulated amortization of $16,842 and $16,071, respectively (4,757) (5,493)
Notes payable 1,091,787 1,091,051
Deferred debt issuance costs, accumulated amortization $ 16,842 16,071
Mortgages | LIBOR    
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]    
Interest cap rate 6.00%  
Mortgages | Prime Rate    
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]    
Interest rate 8.25%  
Mortgages | 731 Lexington Avenue | Office Space    
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]    
Interest rate (in percentage) 6.09%  
Mortgage payable gross $ 500,000 500,000
Mortgages | 731 Lexington Avenue | Office Space | LIBOR    
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]    
Basis spread over LIBOR or SOFR 0.90%  
Mortgages | 731 Lexington Avenue | Office Space | LIBOR | Maximum    
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]    
Interest cap rate 6.00%  
Mortgages | 731 Lexington Avenue | Office Space | Prime Rate    
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]    
Interest rate 6.00%  
Mortgages | 731 Lexington Avenue | Retail Space    
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]    
Interest rate (in percentage) 1.76%  
Mortgage payable gross $ 300,000 300,000
Mortgages | 731 Lexington Avenue | Retail Space | Secured Overnight Financing Rate (SOFR)    
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]    
Basis spread over LIBOR or SOFR 1.51%  
Mortgages | Rego Park II | Retail Space    
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]    
Interest rate (in percentage) 5.60%  
Mortgage payable gross $ 202,544 202,544
Mortgages | Rego Park II | Retail Space | Secured Overnight Financing Rate (SOFR)    
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]    
Basis spread over LIBOR or SOFR 1.45%  
Mortgages | Rego Park II | Retail Space | Secured Overnight Financing Rate (SOFR) | Maximum    
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]    
Interest cap rate 4.15%  
Mortgages | Alexander Apartment Tower | Apartment Building    
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]    
Interest rate (in percentage) 2.63%  
Mortgage payable gross $ 94,000 $ 94,000
v3.23.2
Stock-Based Compensation - Additional Information (Detail) - 2016 Omnibus Stock Plan - Director - Deferred Stock Units - USD ($)
1 Months Ended
May 31, 2023
Jun. 30, 2023
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Non option equity instruments granted per director (in shares) 449  
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)   23,388
Shares available for future grant under the plan (in shares)   482,399
v3.23.2
Fair Value Measurements - Fair Value, Assets and Liabilities Measured on Recurring Basis (Detail) - Recurring - USD ($)
$ in Thousands
Jun. 30, 2023
Dec. 31, 2022
ASSETS    
Total assets   $ 296,314
US Treasury Bill Securities    
ASSETS    
Investments in U.S. Treasury bills   266,963
Interest rate swap    
ASSETS    
Interest rate derivatives (included in other assets) $ 38,407 29,351
Level 1    
ASSETS    
Total assets   266,963
Level 1 | US Treasury Bill Securities    
ASSETS    
Investments in U.S. Treasury bills   266,963
Level 1 | Interest rate swap    
ASSETS    
Interest rate derivatives (included in other assets) 0 0
Level 2    
ASSETS    
Total assets   29,351
Level 2 | US Treasury Bill Securities    
ASSETS    
Investments in U.S. Treasury bills   0
Level 2 | Interest rate swap    
ASSETS    
Interest rate derivatives (included in other assets) 38,407 29,351
Level 3    
ASSETS    
Total assets   0
Level 3 | US Treasury Bill Securities    
ASSETS    
Investments in U.S. Treasury bills   0
Level 3 | Interest rate swap    
ASSETS    
Interest rate derivatives (included in other assets) $ 0 $ 0
v3.23.2
Fair Value Measurements - Summarizes Of Interest Rate Derivatives (Details) - USD ($)
$ in Thousands
6 Months Ended
Jun. 30, 2023
Jul. 16, 2023
Dec. 31, 2022
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]      
Included in other assets $ 38,407   $ 29,351
Payments for derivative instrument 11,258    
Mortgages      
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]      
Payments for derivative instrument $ 11,258    
LIBOR | Mortgages      
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]      
Interest cap rate 6.00%    
LIBOR | Mortgages | Subsequent Event      
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]      
Interest cap rate   6.00%  
Prime Rate | Mortgages      
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]      
Interest rate 8.25%    
731 Lexington Avenue Mortgage Loan, Retail Condominium | Interest rate swap | Designated as Hedging Instrument      
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]      
Included in other assets $ 24,189   26,718
Notional Amount $ 300,000    
Swapped Rate 1.76%    
Rego Park II Shopping Center Mortgage Loan | Interest rate swap | Designated as Hedging Instrument      
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]      
Included in other assets $ 3,106   2,622
Notional Amount $ 202,544    
Rego Park II Shopping Center Mortgage Loan | Interest rate swap | Designated as Hedging Instrument | SOFR      
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]      
Interest cap rate 4.15%    
731 Lexington Avenue Mortgage Loan, Office Condominium | Interest rate swap | Designated as Hedging Instrument      
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]      
Included in other assets $ 11,112   $ 11
Notional Amount $ 500,000    
731 Lexington Avenue Mortgage Loan, Office Condominium | Interest rate swap | Designated as Hedging Instrument | LIBOR | Subsequent Event      
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]      
Interest cap rate   6.00%  
v3.23.2
Fair Value Measurements - Fair Value, by Balance Sheet Grouping (Detail) - USD ($)
$ in Thousands
Jun. 30, 2023
Dec. 31, 2022
Carrying Amount    
Assets:    
Cash equivalents $ 366,143 $ 47,852
Liabilities:    
Mortgages payable (excluding deferred debt issuance costs, net) 1,096,544 1,096,544
Fair Value | Level 1    
Assets:    
Cash equivalents 366,143 47,852
Fair Value | Level 2    
Liabilities:    
Mortgages payable (excluding deferred debt issuance costs, net) $ 1,054,151 $ 1,061,221
v3.23.2
Commitments and Contingencies - Additional Information (Detail)
6 Months Ended
Jun. 30, 2023
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 occurrence 1,700,000,000
Terrorism Coverage Including NBCR  
Loss Contingencies [Line Items]  
Insurance maximum coverage per occurrence 1,700,000,000
Insurance maximum coverage in aggregate $ 1,700,000,000
NBCR  
Loss Contingencies [Line Items]  
Federal government responsibility 80.00%
NBCR | FNSIC  
Loss Contingencies [Line Items]  
Insurance deductible $ 298,000
Self insured responsibility 20.00%
General Liability  
Loss Contingencies [Line Items]  
Insurance maximum coverage per property $ 300,000,000
Insurance maximum coverage per occurrence 300,000,000
Disease Coverage  
Loss Contingencies [Line Items]  
Insurance maximum coverage per occurrence $ 30,000,000
v3.23.2
Earnings Per Share - Narrative (Details) - shares
3 Months Ended 6 Months Ended
Jun. 30, 2023
Jun. 30, 2022
Jun. 30, 2023
Jun. 30, 2022
Earnings Per Share [Abstract]        
Potentially dilutive securities outstanding 0 0 0 0
v3.23.2
Earnings Per Share - Schedule of Earnings Per Share, Basic and Diluted (Detail) - USD ($)
$ / shares in Units, $ in Thousands
3 Months Ended 6 Months Ended
Jun. 30, 2023
Jun. 30, 2022
Jun. 30, 2023
Jun. 30, 2022
Earnings Per Share [Abstract]        
Net income $ 64,147 $ 14,814 $ 75,373 $ 29,346
Weighted average shares outstanding - basic (in shares) 5,128,823 5,125,710 5,127,959 5,125,098
Weighted average shares outstanding - diluted (in shares) 5,128,823 5,125,710 5,127,959 5,125,098
Net income per common share - basic (in usd per share) $ 12.51 $ 2.89 $ 14.70 $ 5.73
Net income per common share - diluted (in usd per share) $ 12.51 $ 2.89 $ 14.70 $ 5.73

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