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Designation [Axis] Hedging Designation [Axis] Credit Facility [Axis] Credit Facility [Axis] Name Measure Name Interest expense associated with property in receivership Interest Expense, Nonoperating, Property In Receivership Interest Expense, Nonoperating, Property In Receivership Retail Property Retail Property [Member] Retail Property Pay vs Performance Disclosure [Line Items] Fair Value Hierarchy and NAV [Domain] Fair Value Hierarchy and NAV [Domain] Debt Instrument [Line Items] Debt Instrument [Line Items] 1400 Broadway 1400 Broadway [Member] 1400 Broadway Additional Paid-In Capital Additional Paid-in Capital [Member] Goodwill impairment charge Goodwill impairment charge Goodwill, Impairment Loss 10 Union Square East Fixed Rate Debt, 10 Union Square East [Member] Fixed Rate Debt, 10 Union Square [Member] Name Trading Arrangement, Individual Name Cash and cash equivalents Cash and cash equivalents at beginning of period Cash and cash equivalents at end of period Cash and Cash Equivalent Exchange ratio Operating Partnership Unit, Exchange Ratio Operating Partnership Unit, Exchange Ratio Company Selected Measure Amount Company Selected Measure Amount Schedule of Reconciliation of Net income to Net operating Income Segment Reporting, Reconciliation of Profit (Loss) by Segment to Consolidated [Table Text Block] Depreciation and amortization Depreciation, Depletion and Amortization TSR modifier period (in years) Share-Based Compensation Arrangement By Share-Based Payment Award, Total Shareholder Return (TSR) Modifier Period Share-Based Compensation Arrangement By Share-Based Payment Award, Total Shareholder Return (TSR) Modifier Period Senior unsecured notes due 2033 (Series F) Series F Senior Notes Due 2033 [Member] Series F Senior Notes due 2033 [Member] Weighted average remaining lease term (in years) Operating Lease, Weighted Average Remaining Lease Term Non-PEO NEO Non-PEO NEO [Member] Award Timing Method Award Timing Method [Text Block] Net decrease in cash and cash equivalents and restricted cash Cash, Cash Equivalent, Restricted Cash, and Restricted Cash Equivalent, Period Increase (Decrease), Including Exchange Rate Effect and Discontinued Operation Forecast Forecast [Member] Tenant and other receivables Accounts and Financing Receivable, after Allowance for Credit Loss Forgone Recovery, Explanation of Impracticability Forgone Recovery, Explanation of Impracticability [Text Block] Senior unsecured notes due 2029 (Series I) Series I Senior Notes Due 2029 [Member] Series I Senior Notes Due 2029 Expected price volatility, minimum (as a percent) Share-Based Compensation Arrangement by Share-Based Payment Award, Fair Value Assumptions, Expected Volatility Rate, Minimum 2028 Lessor, Operating Lease, Payment to be Received, Year Two Unsecured term loan facility Term Loan Facility [Member] Term Loan Facility Long-term Debt, Type [Axis] Long-Term Debt, Type [Axis] Erroneous Compensation Analysis Erroneous Compensation Analysis [Text Block] Acquired above-market leases Above Market Leases [Member] Restatement Determination Date: Restatement Determination Date [Axis] Capitalized transaction costs Business Acquisition, Transaction Costs, Net Business Acquisition, Transaction Costs, Net Proceeds from mortgage notes payable Proceeds from Notes Payable Non-controlling interest in the Operating Partnership Noncontrolling Interest in Net Income (Loss) Operating Partnerships, Nonredeemable Revenues: Revenues: Revenues [Abstract] Pension Benefits Adjustments, Footnote Pension Benefits Adjustments, Footnote [Text Block] Numerator - Diluted: Net Income (Loss) Available to Common Stockholders, Diluted [Abstract] Statistical Measurement [Domain] Statistical Measurement [Domain] Document Fiscal Year Focus Document Fiscal Year Focus 250 West 57th Street Fixed Rate Debt, 250 West 57th Street [Member] Fixed Rate Debt, 250 West 57th Street Restricted Stock and LTIP Units Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Nonvested, Number of Shares [Roll Forward] Deferred rent receivables Deferred Rent Receivables, Net 130 Mercer Street 130 Mercer Street [Member] 130 Mercer Street Intangible liabilities Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Intangible Liabilities Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Intangible Liabilities Common stock Common Stock, Value, Issued 2027 Lessee, Operating Lease, Liability, to be Paid, Year One Interest Expense, Operating and Nonoperating Interest Expense, Operating and Nonoperating Taxes paid on withholding shares Payment, Tax Withholding, Share-Based Payment Arrangement Schedule of Debt Schedule of Long-Term Debt Instruments [Table Text Block] Performance period (in years) Share-Based Compensation Arrangement by Share-Based Payment Award, Award Requisite Service Period Thereafter Long-Term Debt, Maturities, Repayments Of Principal After Year Four, Portion Attributable To Amortization Long-Term Debt, Maturities, Repayments Of Principal After Year Four, Portion Attributable To Amortization Restatement Determination Date Restatement Determination Date Right-Of-Use Assets, Including Below Market Lease, Acquired Right-Of-Use Assets, Including Below Market Lease, Acquired Right-Of-Use Assets, Including Below Market Lease, Acquired Senior unsecured notes due 2035 (Series H) Series H Senior Notes Due 2035 [Member] Series H Senior Notes due 2035 [Member] Amendment Flag Amendment Flag Goodwill [Line Items] Goodwill [Line Items] Unsecured revolving credit facility Unsecured Revolving Credit Facility [Member] Unsecured Revolving Credit Facility [Member] Less: accumulated depreciation Real Estate Investment Property, Accumulated Depreciation Disposal Group Classification [Axis] Disposal Group Classification [Axis] Building and Improvements Business Combination, Recognized Asset Acquired, Property, Plant, and Equipment, Building Loss Contingencies [Table] Loss Contingencies [Table] 561 10th Avenue - Series B Fixed Rate Debt - 561 10th Avenue Series B [Member] Fixed Rate Debt - 561 10th Avenue Series B Private perpetual preferred units: Private Perpetual Preferred Units [Abstract] Private Perpetual Preferred Units Adjustment to Non-PEO NEO Compensation Footnote Adjustment to Non-PEO NEO Compensation Footnote [Text Block] Entity Address, State or Province Entity Address, State or Province Senior unsecured notes due 2031 (Series J) Series J Senior Notes Due 2031 [Member] Series J Senior Notes Due 2031 PEO Total Compensation Amount PEO Total Compensation Amount Share Repurchase Program [Domain] Share Repurchase Program [Domain] Aggregate notional value Derivative, Notional Amount Basic (in shares) Weighted average shares outstanding – basic (in shares) Weighted Average Number of Shares Outstanding, Basic Accumulated impairment charges Goodwill, Impaired, Accumulated Impairment Loss LTIP unit, share of stock equivalent (in shares) Long-Term Incentive Plan Units, Stock Equivalent Long-Term Incentive Plan Units, Stock Equivalent Fair Value, by Balance Sheet Grouping [Table] Fair Value, by Balance Sheet Grouping [Table] Loss Contingencies [Line Items] Loss Contingencies [Line Items] Private perpetual preferred units, per unit liquidation preference (in USD per share) Private Perpetual Preferred Units, Liquidation Preference Per Share Private Perpetual Preferred Units, Liquidation Preference Per Share 2030 Lessee, Operating Lease, Liability, to be Paid, Year Four Median Median [Member] Less: Segment Reporting, Descriptive Information [Abstract] Awards that do not Meet Age and Service Requirements for Vesting Awards That Do Not Meet Age And Service Requirements For Vesting [Member] Awards that Do Not Meet Age and Service Requirements for Vesting [Member] Document Information [Line Items] Document Information [Line Items] Award Timing MNPI Disclosure Award Timing MNPI Disclosure [Text Block] Vested (in shares) Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Vested in Period Basis of Quarterly Presentation Basis of Accounting, Policy [Policy Text Block] Class of Stock [Axis] Class of Stock [Axis] Observatory revenue realized during the second quarter, previous ten years (as a percent) Historical Revenue Trend, Observatory Revenue, In Quarter Two Over Ten Year Period, Percent Historical Revenue Trend, Observatory Revenue, In Quarter Two Over Ten Year Period, Percent Total deferred financing costs Debt Issuance Costs, Gross Net income (loss) attributable to common stockholders Net Income (Loss) Available to Common Stockholders, Basic Cumulative preferential annual cash distributions (in USD per share) Preferred Units, Cumulative Cash Distributions, Per Share Preferred Units, Cumulative Cash Distributions, Per Share Maximum borrowing capacity Line of Credit Facility, Maximum Borrowing Capacity 2026 Plan 2026 Plan [Member] 2026 Plan Total Long-Term Debt, Maturities, Repayments Of Principal, Portion Attributable To Amortization Long-Term Debt, Maturities, Repayments Of Principal, Portion Attributable To Amortization Straight-lining of rental revenue Straight Line Rent Schedule of Amortizing Acquired Intangible Assets and Liabilities Schedule Of Amortizing Acquired Intangible Assets And Liabilities [Table Text Block] Schedule Of Amortizing Acquired Intangible Assets And Liabilities [Table Text Block] Litigation Case [Axis] Litigation Case [Axis] 2026 Long-Term Debt, Maturities, Repayments Of Principal In Remainder Of Fiscal Year, Principal Maturities Long-Term Debt, Maturities, Repayments Of Principal In Remainder Of Fiscal Year, Principal Maturities Amortization of deferred financing costs Amortization of Debt Issuance Costs Net income (loss) attributable to common stockholders – basic Net Income (Loss), Excluding Portion Attributable To Noncontrolling Interest And Participating Securities, Basic Net Income (Loss), Excluding Portion Attributable To Noncontrolling Interest And Participating Securities, Basic Schedule of Preferred Units [Table] Partners' Capital, Master Limited Partnership, Preferred Unit [Table] Add: Segment Reporting, Reconciliation [Abstract] Intangible assets Business Combination, Recognized Asset Acquired, Identifiable Intangible Asset, Excluding Goodwill Total Long-term debt Long-Term Debt Increase (decrease) in cash flows due to changes in operating assets and liabilities: Adjustment to Reconcile Net Income to Cash Provided by (Used in) Operating Activity, Increase (Decrease) in Operating Capital [Abstract] Net cash used in investing activities Cash Provided by (Used in) Investing Activity, Including Discontinued Operation Equity Awards Adjustments, Excluding Value Reported in Compensation Table Equity Awards Adjustments, Excluding Value Reported in the Compensation Table [Member] Security Exchange Name Security Exchange Name Organization, Consolidation and Presentation of Financial Statements Disclosure [Table] Organization, Consolidation and Presentation of Financial Statements Disclosure [Table] Organization, Consolidation and Presentation of Financial Statements Disclosure [Table] Number of shares authorized under the plan (in shares) Share-Based Compensation Arrangement by Share-Based Payment Award, Number of Shares Authorized Statement of Comprehensive Income [Abstract] Statement of Comprehensive Income [Abstract] Deferred Costs [Table] Deferred Costs [Table] Deferred Costs [Table] Name Outstanding Recovery, Individual Name Award Timing, How MNPI Considered Award Timing, How MNPI Considered [Text Block] Principles of Consolidation for Variable Interest Entities Consolidation, Variable Interest Entity, Policy [Policy Text Block] Geographical [Domain] Geographical [Domain] Prior Year End Fair Value of Equity Awards Granted in Any Prior Year that Fail to Meet Applicable Vesting Conditions During Covered Year Prior Year End Fair Value of Equity Awards Granted in Any Prior Year that Fail to Meet Applicable Vesting Conditions During Covered Year [Member] Pension Adjustments Prior Service Cost Pension Adjustments Prior Service Cost [Member] New York City New York City [Member] New York City Total weighted average shares: Weighted Average Number of Shares Outstanding, Basic [Abstract] Effect of dilutive securities: Weighted Average Number of Shares Outstanding, Diluted, Adjustment [Abstract] Amortization of non-cash items within interest expense Amortization of Debt Issuance Costs and Discounts Award Date [Axis] Award Date [Axis] Total principal Total Long-Term Debt, Gross Related Party Transactions [Abstract] Related Party Transactions [Abstract] 2027 Long-Term Debt, Maturities, Repayments Of Principal In Year One, Portion Attributable To Amortization Long-Term Debt, Maturities, Repayments Of Principal In Year One, Portion Attributable To Amortization Compensation Amount Outstanding Recovery Compensation Amount Individual: Individual [Axis] Diluted (in shares) Weighted average shares outstanding – diluted (in shares) Weighted Average Number of Shares Outstanding, Diluted Entity Emerging Growth Company Entity Emerging Growth Company Related Party Transaction [Line Items] Related Party Transaction [Line Items] Underlying Security Market Price Change Underlying Security Market Price Change, Percent 345 East 94th Street - Series B Fixed Rate Debt - 345 East 94th Street Series B [Member] Fixed Rate Debt - 345 East 94th Street Series B Award Date [Domain] Award Date [Domain] Present value discount Lessee, Operating Lease, Liability, Undiscounted Excess Amount Number of extension periods Debt Instrument, Number Of Extension Periods Debt Instrument, Number Of Extension Periods Additions to building and improvements Payments for Capital Improvements Repayment of unsecured senior notes Repayments of Unsecured Debt Organization, Consolidation and Presentation of Financial Statements [Abstract] Organization, Consolidation and Presentation of Financial Statements [Abstract] Total undiscounted lease payments Lessee, Operating Lease, Liability, to be Paid Beginning balance, unvested (in USD per share) Ending balance, unvested (in USD per share) Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value All Executive Categories All Executive Categories [Member] Pension Adjustments Service Cost Pension Adjustments Service Cost [Member] Repayment of unsecured revolving credit facility Repayments of Long-Term Lines of Credit Senior unsecured notes - Series B-L Series A, Series B, Series C, Series D, Series E, Series F, Series G, Series H , Series I, Series J, And Series K Senior Unsecured Notes [Member] Series A, Series B, Series C, Series D, Series E, Series F, Series G, Series H , Series I, Series J, And Series K Senior Unsecured Notes Reconciliation of Cash and Cash Equivalents and Restricted Cash: Cash, Cash Equivalent, Restricted Cash, and Restricted Cash Equivalent, Continuing Operation [Abstract] Schedule of Computation of Earnings Per Share Schedule of Earnings Per Share, Basic and Diluted [Table Text Block] Less: accumulated amortization Accumulated Amortization, Debt Issuance Costs Variable rate, effective percentage (as a percent) Debt Instrument, Variable Rate, Effective Percentage Debt Instrument, Variable Rate, Effective Percentage Debt Disclosure [Abstract] Debt Disclosure [Abstract] Segment Reporting Segment Reporting [Text Block] Total segment operating expenses Segment Operating Expenses Segment Operating Expenses Minimum Minimum [Member] Accrued interest associated with property in receivership Accrued Interest Associated With Property In Receivership Accrued Interest Associated With Property In Receivership Liabilities: Liabilities [Abstract] Denominator: Weighted Average Number of Shares Outstanding Reconciliation [Abstract] Non-Rule 10b5-1 Arrangement Adopted Non-Rule 10b5-1 Arrangement Adopted [Flag] OP units owned by the Company and other partners (in shares) Limited Partners' Capital Account, Units Outstanding Aggregate Grant Date Fair Value of Equity Award Amounts Reported in Summary Compensation Table Aggregate Grant Date Fair Value of Equity Award Amounts Reported in Summary Compensation Table [Member] Repayment of mortgage notes payable Repayments of Notes Payable 111 West 33rd Street and 1400 Broadway 111 West 33rd Street and 1400 Broadway [Member] 111 West 33rd Street and 1400 Broadway Security deposits Increase (Decrease) in Security Deposits Business Combination [Line Items] Business Combination [Line Items] Common stock authorized (in shares) Common Stock, Shares Authorized Real estate properties, net Real Estate Investment Property, Net Settlement of interest rate hedge contracts Settlement Of Derivative, Operating Activities Settlement Of Derivative, Operating Activities Exercise Price Award Exercise Price Restricted stock, net of forfeitures Stock Issued During Period, Value, Restricted Stock Award, Net of Forfeitures Segment Reporting [Line Items] Segment Reporting [Line Items] Stock repurchase authorized amount Share Repurchase Program, Authorized, Amount Document Quarterly Report Document Quarterly Report Year-over-Year Change in Fair Value of Equity Awards Granted in Prior Years That are Outstanding and Unvested Year-over-Year Change in Fair Value of Equity Awards Granted in Prior Years That are Outstanding and Unvested [Member] Observatory revenue realized during the first quarter, previous ten years (as a percent) Historical Revenue Trend, Observatory Revenue, In Quarter One Over Ten Year Period, Percent Historical Revenue Trend, Observatory Revenue, In Quarter One Over Ten Year Period, Percent Accrued interest payable Interest Payable Awards Close in Time to MNPI Disclosures, Table Awards Close in Time to MNPI Disclosures [Table Text Block] Equity Component [Domain] Equity Component [Domain] Real estate taxes Real Estate Tax Expense Adoption Date Trading Arrangement Adoption Date Sales Price Disposal Group, Including Discontinued Operation, Consideration Accounts payable and accrued expenses Increase (Decrease) In Accounts Payable And Accrued Expenses Increase (Decrease) In Accounts Payable And Accrued Expenses Counterparty Name [Domain] Counterparty Name [Domain] Title Trading Arrangement, Individual Title Forgone Recovery due to Disqualification of Tax Benefits, Amount Forgone Recovery due to Disqualification of Tax Benefits, Amount Interest Rate Swap, One Month SOFR, 3.3030 % Interest Rate Swap, One Month SOFR, 3.3030 % [Member] Interest Rate Swap, One Month SOFR, 3.3030 % Accounting Policies [Abstract] Accounting Policies [Abstract] Restatement does not require Recovery Restatement Does Not Require Recovery [Text Block] Risk-free interest rate (as a percent) Share-Based Compensation Arrangement by Share-Based Payment Award, Fair Value Assumptions, Risk Free Interest Rate Ground lease liabilities Operating Lease, Liability Interest Rate Cap, One Month SOFR, 5.5000% Interest Rate Cap, One Month SOFR, 5.5000% [Member] Interest Rate Cap, One Month SOFR, 5.5000% Other revenue and fees Other Operating Income Insider Trading Policies and Procedures Adopted Insider Trading Policies and Procedures Adopted [Flag] Amount awarded to claimants Loss Contingency, Damages Awarded, Value Debt associated with property in receivership Derecognition Associated With Property In Receivership Derecognition Associated With Property In Receivership Derivative Instruments, Gain (Loss) [Line Items] Derivative Instruments, Gain (Loss) [Line Items] Deferred financing costs, included as a component of net debt Deferred Financing Costs, Included In Net Debt Deferred Financing Costs, Included In Net Debt Repayments of debt Repayments of Debt Business Combination [Domain] Business Combination [Domain] Commitments and Contingencies Commitments and Contingencies Disclosure [Text Block] Compensation Actually Paid vs. Net Income Compensation Actually Paid vs. Net Income [Text Block] Rental revenue Total rental revenue Operating Lease, Lease Income Interest Rate Swap, One Month SOFR, 2.5000 %, Swap Number One Interest Rate Swap, One Month SOFR, 2.5000 %, Swap Number One [Member] Interest Rate Swap, One Month SOFR, 2.5000 %, Swap Number One All Adjustments to Compensation All Adjustments to Compensation [Member] Interest Rate Swap, SOFR, 3.7970% Interest Rate Swap, SOFR, 3.7970% [Member] Interest Rate Swap, SOFR, 3.7970% Business Combination [Axis] Business Combination [Axis] Net cash provided by operating activities Cash Provided by (Used in) Operating Activity, Including Discontinued Operation Income Statement [Abstract] Income Statement [Abstract] Empire State Realty Trust, Inc. stockholders' equity: Equity, Attributable to Parent [Abstract] Document Transition Report Document Transition Report Operating expenses: Segment operating expenses: Operating Expenses [Abstract] Intersegment Elimination Intersegment Eliminations [Member] Stock Appreciation Rights (SARs) Stock Appreciation Rights (SARs) [Member] Building and improvements Investment Building and Building Improvements City Area Code City Area Code Conversion of operating partnership units and Class B shares to Class A shares Stock Issued During Period, Value, Conversion of Units Document Information [Table] Document Information [Table] Subsequent Events Subsequent Events [Text Block] Number of plaintiffs opting out of settlement (participant) Loss Contingency, Number Of Plaintiffs Opting Out Of Settlement Loss Contingency, Number Of Plaintiffs Opting Out Of Settlement Less: accumulated amortization Below Market Lease, Accumulated Amortization Age of grantee at which LTIP unit and restricted stock awards immediately vest (in years) Share-Based Payment Arrangement By Share-Based Payment Award, Equity Other Than Options, Vesting Threshold, Age Of Grantee Share-Based Payment Arrangement By Share-Based Payment Award, Equity Other Than Options, Vesting Threshold, Age Of Grantee Name Forgone Recovery, Individual Name Non-GAAP Measure Description Non-GAAP Measure Description [Text Block] Weighted Average Grant Fair Value Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value [Abstract] 345 East 94th Street - Series A Fixed Rate Debt - 345 East 94th Street Series A [Member] Fixed Rate Debt - 345 East 94th Street Series A Common stock outstanding (in shares) Common Stock, Shares, Outstanding, Rounding Common Stock, Shares, Outstanding, Rounding Entity [Domain] Entity [Domain] Preferred stock issued (in shares) Preferred Stock, Shares Issued Other Partners, Company Directors, Members of Senior Management and Other Employees Other Partners, Company Directors, Members Of Senior Management And Other Employees [Member] Other Partners, Company Directors, Members Of Senior Management And Other Employees Conversion of operating partnership units and Class B shares to Class A shares Conversion of Stock, Amount Converted Thereafter Long-Term Debt, Maturities, Repayments Of Principal After Year Four, Principal Maturities Long-Term Debt, Maturities, Repayments Of Principal After Year Four, Principal Maturities Thereafter Lessee, Operating Lease, Liability, To Be Paid, After Year Four Lessee, Operating Lease, Liability, To Be Paid, After Year Four Observatory Observatory Observatory, Segment [Member] Observatory, Segment [Member] Net (income) loss attributable to non-controlling interests and private perpetual preferred unitholders Net Income (Loss) Attributable To Noncontrolling Interests And Private Perpetual Preferred Unitholders Net Income (Loss) Attributable To Noncontrolling Interests And Private Perpetual Preferred Unitholders Noncash share-based compensation expense recognized Share-Based Payment Arrangement, Expense Measurement Basis [Axis] Measurement Basis [Axis] Liability Derivative Asset, Subject to Master Netting Arrangement, Liability Offset Tenant improvements Tenant Improvements Leased Space Rental Leased Space Rental [Member] Leased space rental [Member] Granted (in USD per share) Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Grants in Period, Weighted Average Grant Date Fair Value Subsequent Event Type [Domain] Subsequent Event Type [Domain] Payables and Accruals [Abstract] Payables and Accruals [Abstract] Forfeited or unearned (in USD per share) Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Forfeitures, Weighted Average Grant Date Fair Value Erroneously Awarded Compensation Recovery Erroneously Awarded Compensation Recovery [Table] Entity Current Reporting Status Entity Current Reporting Status Net cash provided by (used in) financing activities Cash Provided by (Used in) Financing Activity, Including Discontinued Operation Total Shareholder Return Amount Total Shareholder Return Amount Cash Flow Hedging Cash Flow Hedging [Member] Chairman Emeritus and Employee Board of Directors, Chairman Emeritus [Member] Board of Directors, Chairman Emeritus [Member] OP units owned by the company (as a percent) Limited Liability Company (LLC) or Limited Partnership (LP), Managing Member or General Partner, Ownership Interest Interest Rate Cap, One Month SOFR , 4.5000% Interest Rate Cap, One Month SOFR , 4.5000% [Member] Interest Rate Cap, One Month SOFR , 4.5000% Adjustments to reconcile net income (loss) to net cash provided by operating activities: Adjustment to Reconcile Net Income to Cash Provided by (Used in) Operating Activity [Abstract] 2029 Long-Term Debt, Maturity, Year Three Cash Flows From Financing Activities Cash Provided by (Used in) Financing Activity, Including Discontinued Operation [Abstract] Numerator - Basic: Net Income (Loss) Available to Common Stockholders, Basic [Abstract] Interest rate swaps and caps included in prepaid expenses and other assets Derivative Asset Number of renewal options Lessee, Operating Lease, Number Of Options To Extend Lessee, Operating Lease, Number Of Options To Extend Intangible Asset, Finite-Lived, Class [Axis] Intangible Asset, Finite-Lived, Class [Axis] Operating Leases [Line Items] Operating Leases [Line Items] [Line Items] for Operating Leases [Table] Underlying Securities Award Underlying Securities Amount Estimated Fair Value Estimate of Fair Value Measurement [Member] Fair Values Derivatives, Balance Sheet Location, by Derivative Contract Type [Table] Fair Values Derivatives, Balance Sheet Location, by Derivative Contract Type [Table] Weighted average discount rate (as a percent) Operating Lease, Weighted Average Discount Rate, Percent Segment Reporting [Table] Segment Reporting [Table] Number of shares that remain available for future issuance (in shares) Share-Based Compensation Arrangement by Share-Based Payment Award, Number of Shares Available for Grant Schedule of Related Party Transactions, by Related Party [Table] Related Party Transaction [Table] Schedule of Amortization Related to Deferred Costs and Acquired Lease Intangibles Lease, Cost [Table Text Block] Commitments and Contingencies Disclosure [Abstract] Commitments and Contingencies Disclosure [Abstract] All Trading Arrangements All Trading Arrangements [Member] Other Performance Measure, Amount Other Performance Measure, Amount Award Timing MNPI Considered Award Timing MNPI Considered [Flag] Accordion feature, new maximum borrowing capacity Line of Credit Facility, Accordion Feature, New Maximum Borrowing Capacity Line of Credit Facility, Accordion Feature, New Maximum Borrowing Capacity Current Fiscal Year End Date Current Fiscal Year End Date Non-PEO NEO Average Total Compensation Amount Non-PEO NEO Average Total Compensation Amount Repurchases of common shares (in shares) Purchases of equity securities (in shares) Stock Repurchased During Period, Shares Leases that have not yet commenced Unrecorded Unconditional Purchase Obligation Change in Fair Value as of Vesting Date of Prior Year Equity Awards Vested in Covered Year Change in Fair Value as of Vesting Date of Prior Year Equity Awards Vested in Covered Year [Member] Dividends per share (in USD per share) Common Stock, Dividends, Per Share, Declared Entity File Number Entity File Number Office Building Office Building [Member] LTIP units Shares Issued, Value, Share-Based Payment Arrangement, after Forfeiture Senior unsecured notes - Series B-L Series B, Series C, Series D, Series E, Series F, Series G, Series H , Series I, Series J, And Series K Senior Unsecured Notes [Member] Series B, Series C, Series D, Series E, Series F, Series G, Series H , Series I, Series J, And Series K Senior Unsecured Notes Distributions accrued and paid to Operating Partnership unitholders (the "OP unitholders") Noncontrolling Interest, Decrease from Distributions to Noncontrolling Interest Holders Recovery of Erroneously Awarded Compensation Disclosure [Line Items] Measure: Measure [Axis] Non-controlling interests in the Operating Partnership Noncontrolling Interest in Operating Partnerships Equity Components [Axis] Equity Components [Axis] Related Party Related Party [Member] Class A Common Stock Common Class A [Member] Entity Interactive Data Current Entity Interactive Data Current Net (income) loss attributable to non-controlling interests Net Income (Loss) Attributable to Noncontrolling Interest Deferred financing costs, net, of accumulated amortization of $10,958 and $9,900, respectively (See Note 5) Debt Issuance Costs, Line of Credit Arrangements, Net Conversion of operating partnership units and Class B shares to Class A shares (in shares) Stock Issued During Period, Shares, Conversion of Units Entity Small Business Entity Small Business Comprehensive income (loss) attributable to common stockholders Comprehensive Income (Loss), Net of Tax, Attributable to Parent 111 West 33rd Street 111 West 33rd Street [Member] 111 West 33rd Street Lease termination fees Lease Termination Fees Revenue Lease Termination Fees Revenue Interest expense Interest Expense, Nonoperating, Excluding Property In Receivership Interest Expense, Nonoperating, Excluding Property In Receivership MNPI Disclosure Timed for Compensation Value MNPI Disclosure Timed for Compensation Value [Flag] Less: accumulated amortization Deferred Initial Direct Cost, Lease, Accumulated Amortization Document Type Document Type Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] Summary of Significant Accounting Policies Significant Accounting Policies [Text Block] Total revenues, excluding third-party management and other fees Revenues, Excluding Third-Party Management And Other Fees Revenues, Excluding Third-Party Management And Other Fees Local Phone Number Local Phone Number Income (loss) before income taxes Income (Loss) from Continuing Operations before Income Taxes, Noncontrolling Interest Commitments and contingencies Commitments and Contingencies Changed Peer Group, Footnote Changed Peer Group, Footnote [Text Block] Reclassification out of Accumulated Other Comprehensive Income [Axis] Reclassification out of Accumulated Other Comprehensive Income [Axis] Executive Category: Executive Category [Axis] Counterparty Name [Axis] Counterparty Name [Axis] 561 10th Avenue - Series A Fixed Rate Debt - 561 10th Avenue Series A [Member] Fixed Rate Debt - 561 10th Avenue Series A LIABILITIES AND EQUITY Liabilities and Equity [Abstract] Net operating income (loss) Total operating income Segment Operating Income (Loss) Segment Operating Income (Loss) 2030 Lessor, Operating Lease, Payment to be Received, Year Four Observatory expenses Observatory expenses Observatory Expense Observatory Expense Non-PEO NEO Average Compensation Actually Paid Amount Non-PEO NEO Average Compensation Actually Paid Amount OP Unit, exchange ratio to common stock Operating Partnership Unit, Exchange Ratio To Common Stock Operating Partnership Unit, Exchange Ratio To Common Stock Supplemental disclosures of cash flow information: Supplemental Cash Flow Information [Abstract] Amount reclassified into interest expense Amount of (gain) loss reclassified from accumulated other comprehensive income (loss) into interest expense Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), Reclassification, after Tax Accounts payable and accrued expenses Accounts Payable and Accrued Liabilities Amortization of acquired above- and below-market leases, net Amortization of below-market leases, net of above-market leases Amortization of above and below Market Leases PEO Name PEO Name Extension period Debt Instrument, Extension Period Debt Instrument, Extension Period Cash paid for income taxes Income Tax Paid, before Refund Received Other segment expenses Segment Reporting, Other Segment Item, Amount Stock Price or TSR Estimation Method Stock Price or TSR Estimation Method [Text Block] Entity Tax Identification Number Entity Tax Identification Number Fixed rate mortgage debt: Long-Term Debt, Percentage Bearing Fixed Interest, Amount Unrealized gain (loss) on valuation of interest rate swap agreements Amount of gain (loss) recognized in other comprehensive income (loss) Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), before Reclassification, after Tax Prepaid expenses and other assets Prepaid Expense and Other Assets Mortgage notes payable, net Notes Payable Fixed payments Operating Lease, Lease Income, Lease Payments Entity Incorporation, State or Country Code Entity Incorporation, State or Country Code Aggregate Erroneous Compensation Not Yet Determined Aggregate Erroneous Compensation Not Yet Determined [Text Block] Equity compensation: Shares Granted or Issued, Share-Based Payment Arrangement [Abstract] Material Terms of Trading Arrangement Material Terms of Trading Arrangement [Text Block] Vesting Date Fair Value of Equity Awards Granted and Vested in Covered Year Vesting Date Fair Value of Equity Awards Granted and Vested in Covered Year [Member] Description of Business and Organization Organization, Consolidation and Presentation of Financial Statements Disclosure [Text Block] Comprehensive income (loss) Comprehensive Income (Loss), Net of Tax, Including Portion Attributable to Noncontrolling Interest Debt Instrument [Axis] Debt Instrument [Axis] Equity based compensation Share-Based Payment Arrangement, Noncash Expense Land Land Disposal Group Name [Axis] Disposal Group Name [Axis] 2028 Long-Term Debt, Maturities, Repayments Of Principal In Year Two, Principal Maturities Long-Term Debt, Maturities, Repayments Of Principal In Year Two, Principal Maturities Schedule of Terms of Agreements and Fair Values of Derivative 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