Leases [Abstract] Rental Income Other Operating Income and Expense [Text Block] Statement of Partners' Capital [Abstract] Statement [Table] Statement [Table] Equity Components [Axis] Equity Components [Axis] Equity Component [Domain] Equity Component [Domain] Total Stockholders' Equity [Member] Parent [Member] Common Stock [Member] Common Stock [Member] Additional Paid-in Capital [Member] Additional Paid-in Capital [Member] Retained Earnings [Member] Retained Earnings [Member] Noncontrolling Interest [Member] Noncontrolling Interest [Member] Private Perpetual Preferred Units [Member] Private Perpetual Preferred Units [Member] Private Perpetual Preferred Units [Member] Class of Stock [Axis] Class of Stock [Axis] Class of Stock [Domain] Class of Stock [Domain] Common Class A [Member] Common Class A [Member] Common Class B [Member] Common Class B [Member] Statement [Line Items] Statement [Line Items] Increase (Decrease) in Stockholders' Equity [Roll Forward] Increase (Decrease) in Stockholders' Equity [Roll Forward] Beginning balance (in shares) Common Stock, Shares, Outstanding Beginning balance Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest Conversion of operating partnership units and Class B shares to Class A shares (in shares) Stock Issued During Period, Shares, Conversion of Units Conversion of operating partnership units and Class B shares to Class A shares Stock Issued During Period, Value, Conversion of Units Net income Net Income (Loss), Including Portion Attributable to Noncontrolling Interest Equity compensation: Stock Issued or Granted During Period, Share-based Compensation [Abstract] LTIP units Stock Issued During Period, Value, Share-based Compensation, Net of Forfeitures Restricted stock, net of forfeitures (in shares) Stock Issued During Period, Shares, Restricted Stock Award, Net of Forfeitures Restricted stock, net of forfeitures Stock Issued During Period, Value, Restricted Stock Award, Net of Forfeitures Dividends and distributions Dividends Ending balance (in shares) Ending balance Fair Value Disclosures [Abstract] Fair Value, by Balance Sheet Grouping [Table] Fair Value, by Balance Sheet Grouping [Table] Long-term Debt, Type [Axis] Long-term Debt, Type [Axis] Long-term Debt, Type [Domain] Long-term Debt, Type [Domain] Mortgages [Member] Convertible Debt [Member] Convertible Debt [Member] Senior Notes [Member] Senior Notes [Member] Measurement Basis [Axis] Measurement Basis [Axis] Fair Value Measurement [Domain] Fair Value Measurement [Domain] Portion at Fair Value Measurement [Member] Portion at Fair Value Measurement [Member] Carrying Amount [Member] Reported Value Measurement [Member] Fair Value [Member] Estimate of Fair Value Measurement [Member] Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] Notes payable at Fair Value Measurement Date Notes Payable, Fair Value Disclosure Lines of Credit, Fair Value Disclosure Lines of Credit, Fair Value Disclosure Term loan and credit facility Loans Payable, Fair Value Disclosure Segment Reporting [Abstract] Segment Reporting Segment Reporting Disclosure [Text Block] Payables and Accruals [Abstract] Accounts Payable and Accrued Expenses Accounts Payable and Accrued Liabilities Disclosure [Text Block] Equity [Abstract] Schedule of Stock by Class [Table] Schedule of Stock by Class [Table] Class of Stock [Line Items] Class of Stock [Line Items] Net income attributable to common stockholders Net Income (Loss) Available to Common Stockholders, Basic Increase in additional paid-in capital for the conversion of OP units into common stock Change from net income attributable to common stockholders and transfers from noncontrolling interests Net Income (Loss) Available to Common Stockholders, Adjusted for Conversion of Convertible Units and Transfers from Noncontrolling Interest Net Income (Loss) Available to Common Stockholders, Adjusted for Conversion of Convertible Units and Transfers from Noncontrolling Interest Shares and Units [Abstract] Partners' Capital Account, Units, Sale of Units [Abstract] OP units outstanding (shares) Units of Partnership Interest, Amount OP units owned by the Company (shares) General Partners' Capital Account, Units Outstanding OP units owned by the Company, percent Limited Liability Company (LLC) or Limited Partnership (LP), Managing Member or General Partner, Ownership Interest OP units not owned by the Company (shares) Limited Partners' Capital Account, Units Outstanding OP units not owned by the Company, percent Limited Liability Company (LLC) or Limited Partnership (LP), Members or Limited Partners, Ownership Interest Dividends and Distributions [Abstract] Dividends and Distributions [Abstract] Dividends and Distributions [Abstract] Dividends paid to common shareholders Payments of Ordinary Dividends, Common Stock Distributions paid to OP unitholders Noncontrolling Interest, Decrease from Distributions to Noncontrolling Interest Holders Private perpetual preferred unit distributions Payments of Private Perpetual Preferred Units Distributions Payments of Private Perpetual Preferred Units Distributions Deferred Costs, Capitalized, Prepaid, and Other Assets Disclosure [Abstract] Leasing costs Deferred Costs, Leasing, Gross Financing costs Deferred Finance Costs, Gross Total deferred costs, Gross Amount Deferred Costs, Gross Deferred Costs, Gross Leasing costs, Accumulated Amortization Deferred Costs, Leasing, Accumulated Amortization Financing costs, Accumulated Amortization Accumulated Amortization, Deferred Finance Costs Total deferred costs, Accumulated Amortization Accumulated Amortization, Deferred Costs Accumulated Amortization, Deferred Costs Commitments and Contingencies Disclosure [Abstract] Loss Contingencies [Table] Loss Contingencies [Table] Scenario [Axis] Scenario [Axis] Scenario, Unspecified [Domain] Scenario, Unspecified [Domain] Predecessor [Member] Predecessor [Member] Litigation Status [Axis] Litigation Status [Axis] Litigation Status [Domain] Litigation Status [Domain] Pending Litigation [Member] Pending Litigation [Member] Litigation Case [Axis] Litigation Case [Axis] Litigation Case [Domain] Litigation Case [Domain] New York State Supreme Court, New York County [Member] New York State Supreme Court, New York County [Member] New York State Supreme Court, New York County [Member] Loss Contingencies [Line Items] Loss Contingencies [Line Items] Number of claims Loss Contingency, Pending Claims, Number Damages awarded Loss Contingency, Damages Awarded, Value Percent of damages awarded required to be in cash Loss Contingency, Damages Awarded, Percent in Cash, Minimum Loss Contingency, Damages Awarded, Percent in Cash, Minimum Maximum percent of freely-tradable common stock or partnership units Loss Contingency, Damages Awarded, Freely-tradable Common Stock or Operating Units, Maximum Loss Contingency, Damages Awarded, Freely-tradable Common Stock or Operating Units, Maximum Number of LLC's Loss Contingency, Number of LLC's Loss Contingency, Number of LLC's Maximum difference between exchange value and prospectus statement Loss Contingency, Maximum Difference Between Exchange Value and Prospectus Statement Loss Contingency, Maximum Difference Between Exchange Value and Prospectus Statement Proceeds from issuance of common stock threshold amount of consolidation considerations Loss Contingency, Proceeds from Issuance of Common Stock, Threshold Amount, Consolidation Considerations Loss Contingency, Proceeds from Issuance of Common Stock, Threshold Amount, Consolidation Considerations Number of plaintiffs Loss Contingency, Number of Plaintiffs Number of plaintiffs opting out of settlement Loss Contingency, Number of Plaintiffs Opting Out of Settlement Loss Contingency, Number of Plaintiffs Opting Out of Settlement Attorney fees sought Loss Contingency, Damages Awarded, Attorney Fees Sought, Value Loss Contingency, Damages Awarded, Attorney Fees Sought, Value Attorney expenses sought Loss Contingency, Damages Awarded, Attorney Expenses Sought, Value Loss Contingency, Damages Awarded, Attorney Expenses Sought, Value Attorney fees awarded Loss Contingency, Damages Awarded, Attorney Fees Awarded, Value Loss Contingency, Damages Awarded, Attorney Fees Awarded, Value Attorney expenses awarded Loss Contingency, Damages Awarded, Attorney Expenses Awarded, Value Loss Contingency, Damages Awarded, Attorney Expenses Awarded, Value Number of additional investors who apposed the settlement Number of Additional Investors who Apposed the Settlement Number of Additional Investors who Apposed the Settlement Number of Investors who had Filed a Notice of Appeal Number of Investors who had Filed a Notice of Appeal Number of Investors who had Filed a Notice of Appeal Schedule of Accounts Payable and Accrued Expenses Schedule of Accounts Payable and Accrued Liabilities [Table Text Block] Related Party Transactions [Abstract] Related Party Transactions Related Party Transactions Disclosure [Text Block] Accounting Policies [Abstract] Accounting Policies [Table] Accounting Policies [Table] Accounting Policies [Table] Range [Axis] Range [Axis] Range [Domain] Range [Domain] Minimum [Member] Minimum [Member] Maximum [Member] Maximum [Member] Accounting Policies [Line Items] Accounting Policies [Line Items] [Line Items] for Accounting Policies [Table] Percent of observatory revenue in quarter one over a ten year period 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 Percent of observatory revenue in quarter two over a ten year period 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 Percent of observatory revenue in quarter three over a ten year period Historical Revenue Trend, Observatory Revenue, in Quarter Three Over Ten Year Period, Percent Historical Revenue Trend, Observatory Revenue, in Quarter Three Over Ten Year Period, Percent Percent of observatory revenue in quarter four over a ten year period Historical Revenue Trend, Observatory Revenue, in Quarter Four Over Ten Year Period, Percent Historical Revenue Trend, Observatory Revenue, in Quarter Four Over Ten Year Period, Percent Schedule of Change in Net Income Attributable to Common Shareholders [Table Text Block] Schedule of Change in Net Income Attributable to Common Shareholders [Table Text Block] Schedule of Change in Net Income Attributable to Common Shareholders [Table Text Block] Summary of Restricted Stock and Long-Term Incentive Plan Activity Disclosure of Share-based Compensation Arrangements by Share-based Payment Award [Table Text Block] Schedule of Earnings Per Share, Basic and Diluted Schedule of Earnings Per Share, Basic and Diluted [Table Text Block] Subsequent Events [Abstract] Subsequent Event [Table] Subsequent Event [Table] Subsequent Event Type [Axis] Subsequent Event Type [Axis] Subsequent Event Type [Domain] Subsequent Event Type [Domain] Subsequent Event [Member] Subsequent Event [Member] Debt Instrument [Axis] Debt Instrument [Axis] Debt Instrument, Name [Domain] Debt Instrument, Name [Domain] Floating Rate Debt, One Grand Central Place - Third Lien [Member] Floating Rate Debt, One Grand Central Place - Third Lien [Member] Floating Rate Debt, One Grand Central Place - Third Lien [Member] Subsequent Event [Line Items] Subsequent Event [Line Items] Debt instrument face amount Debt Instrument, Face Amount Schedule of Segment Reporting Information, by Segment Schedule of Segment Reporting Information, by Segment [Table Text Block] Schedule of Share-based Compensation Arrangements by Share-based Payment Award [Table] Schedule of Share-based Compensation Arrangements by Share-based Payment Award [Table] Title of Individual [Axis] Title of Individual [Axis] Relationship to Entity [Domain] Relationship to Entity [Domain] Director [Member] Director [Member] Executive Officer [Member] Executive Officer [Member] Vesting [Axis] Vesting [Axis] Vesting [Domain] Vesting [Domain] 2013 Plan Units Vesting January 2015 [Member] 2013 Plan Units Vesting January 2018 [Member] 2013 Plan Units Vesting January 2018 [Member] 2013 Plan Units Vesting February 2015 [Member] 2013 Plan Units Vesting February 2018 [Member] 2013 Plan Units Vesting February 2018 [Member] Awards that Meet Age and Service Requirements for Vesting [Member] Awards that Meet Age and Service Requirements for Vesting [Member] Awards that Meet Age and Service Requirements for Vesting [Member] Awards that Do Not Meet Age and Service Requirements for Vesting [Member] Awards that Do Not Meet Age and Service Requirements for Vesting [Member] Awards that Do Not Meet Age and Service Requirements for Vesting [Member] Award Type [Axis] Award Type [Axis] Equity Award [Domain] Equity Award [Domain] Long-Term Incentive Plan Unit and Restricted Stock [Member] Long-Term Incentive Plan Unit and Restricted Stock [Member] Long-Term Incentive Plan Unit and Restricted Stock [Member] Long-Term Incentive Plan Unit [Member] Long-Term Incentive Plan Unit [Member] Long-Term Incentive Plan Unit [Member] Time Based Long-Tern Incentive Plan Unit [Member] Time Based Long-Tern Incentive Plan Unit [Member] Time Based Long-Tern Incentive Plan Unit [Member] Performance Based Long-Term Incentive Plan Unit [Member] Performance Based Long-Term Incentive Plan Unit [Member] Performance Based Long-Term Incentive Plan Unit [Member] Restricted Stock [Member] Restricted Stock [Member] Performance Restricted Shares [Member] Performance Restricted Shares [Member] Performance Restricted Shares [Member] Time Restricted Shares [Member] Time Restricted Shares [Member] Time Restricted Shares [Member] Plan Name [Axis] Plan Name [Axis] Plan Name [Domain] Plan Name [Domain] 2013 Plan [Member] 2013 Plan [Member] 2013 Plan [Member] Share-based Compensation Arrangement by Share-based Payment Award [Line Items] Share-based Compensation Arrangement by Share-based Payment Award [Line Items] Number of shares authorized under the plan Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Authorized Number of shares that remain available for future issuance Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Available for Grant Fair value of share-based awards granted in period Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Granted in Period, Fair Value Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Granted in Period, Fair Value Award vesting period (in years) Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period Number of Vesting Installments Number of Vesting Installments Number of Vesting Installments Expected volatility rate look-back period (in years) Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Expected Volatility Rate Look-Back Period Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Expected Volatility Rate Look-Back Period Forfeiture rate, percent Share-based Compensation Arrangement by Share-based Payment Award, Equity Instrument other than Options, Forfeitures Rate Share-based Compensation Arrangement by Share-based Payment Award, Equity Instrument other than Options, Forfeitures Rate Expected term Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Expected Term Dividend rate Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Expected Dividend Rate Risk-free interest rate Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Risk Free Interest Rate Expected price volatility Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Expected Volatility Rate Restricted Stock and LTIP Unit Activity [Roll Forward] Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number of Shares [Roll Forward] Beginning balance, Unvested (in shares) Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Vested in Period Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Vested in Period Granted (in shares) Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period Forfeited (in shares) Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Forfeited in Period Ending balance, Unvested (in shares) Beginning balance, Unvested, Weighted Average Grant Price, per share Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Vested in Period, Weighted Average Grant Date Fair Value Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Vested in Period, Weighted Average Grant Date Fair Value Granted, Weighted Average Grant Price, 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 Forfeited, Weighted Average Grant Price, per share Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Forfeitures, Weighted Average Grant Date Fair Value Ending balance, Unvested, Weighted Average Grant Price, per share Age of grantee at which LTIP unit and restricted stock awards immediately vest 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 Period of service, upon completion of which, grantee's LTIP unit and restricted stock awards will immediately vest Share-based Compensation Arrangement by Share-based Payment Award, Award Requisite Service Period Noncash share-based compensation expense recognized Allocated Share-based Compensation Expense Unrecognized compensation expense Employee Service Share-based Compensation, Nonvested Awards, Compensation Cost Not yet Recognized Unrecognized compensation expense, period for recognition (in years) Employee Service Share-based Compensation, Nonvested Awards, Compensation Cost Not yet Recognized, Period for Recognition Debt Disclosure [Abstract] Schedule of Long-term Debt Instruments [Table] Schedule of Long-term Debt Instruments [Table] Credit Facility [Axis] Credit Facility [Axis] Credit Facility [Domain] Credit Facility [Domain] Revolving Credit Facility [Member] Revolving Credit Facility [Member] 10 Union Square [Member] Fixed Rate Debt, 10 Union Square [Member] Fixed Rate Debt, 10 Union Square [Member] 10 Bank Street [Member] Fixed Rate Debt, 10 Bank Street [Member] Fixed Rate Debt, 10 Bank Street [Member] 1542 Third Avenue [Member] Fixed Rate Debt, 1542 Third Avenue [Member] Fixed Rate Debt, 1542 Third Avenue [Member] First Stamford Place [Member] Fixed Rate Debt, First Stamford Place [Member] Fixed Rate Debt, First Stamford Place [Member] 1010 Third Avenue and 77 West 55th Street [Member] Fixed Rate Debt, 1010 Third Avenue and 77 West 55th Street [Member] Fixed Rate Debt, 1010 Third Avenue and 77 West 55th Street [Member] 383 Main Avenue [Member] Fixed Rate Debt, 383 Main Avenue [Member] Fixed Rate Debt, 383 Main Avenue [Member] 1333 Broadway [Member] Fixed Rate Debt - 1333 Broadway [Member] Fixed Rate Debt - 1333 Broadway [Member] 1400 Broadway - First Lien [Member] 1400 Broadway - First Lien [Member] 1400 Broadway - First Lien [Member] 1400 Broadway - Second Lien [Member] 1400 Broadway - Second Lien [Member] 1400 Broadway - Second Lien [Member] 112 West 34th Street - First Lien [Member] 112 West 34th Street - First Lien [Member] 112 West 34th Street - First Lien [Member] 112 West 34th Street - Second Lien [Member] 112 West 34th Street - Second Lien [Member] 112 West 34th Street - Second Lien [Member] 1350 Broadway - First Lien Mortgage Loan [Member] Fixed Rate Debt - 1350 Broadway - First Lien Mortgage Loan [Member] Fixed Rate Debt - 1350 Broadway - First Lien Mortgage Loan [Member] Metro Center Debt [Member] Metro Center Debt [Member] Fixed Rate Debt - Metro Center Debt [Member] Fixed Rate Debt, 1359 Broadway [Member] Fixed Rate Debt, 1359 Broadway [Member] Fixed Rate Debt, 1359 Broadway [Member] Exchangeable Senior Notes due August 15, 2019 [Member] Exchangeable Senior Notes due August 15, 2019 [Member] Exchangeable Senior Notes due August 15, 2019 [Member] Series A Senior Notes due 2025 [Member] Series A Senior Notes due 2025 [Member] Series A Senior Notes due 2025 [Member] Series B Senior Notes due 2027 [Member] Series B Senior Notes due 2027 [Member] Series B Senior Notes due 2027 [Member] Series C Senior Notes due 2030 [Member] Series C Senior Notes due 2030 [Member] Series C Senior Notes due 2030 [Member] Unsecured Revolving Credit Facility [Member] Unsecured Revolving Credit Facility [Member] Unsecured Revolving Credit Facility [Member] Floating Rate Debt - Secured Revolving Credit Facility [Member] Floating Rate Debt - Secured Revolving Credit Facility [Member] Floating Rate Debt - Secured Revolving Credit Facility [Member] Secured Term Credit Facility [Member] Floating Rate Debt - Secured Term Credit Facility [Member] Floating Rate Debt - Secured Term Credit Facility [Member] Variable Rate [Axis] Variable Rate [Axis] Variable Rate [Domain] Variable Rate [Domain] LIBOR [Member] London Interbank Offered Rate (LIBOR) [Member] Debt Instrument [Line Items] Debt Instrument [Line Items] Fixed rate mortgage debt Long-term Debt, Percentage Bearing Fixed Interest, Amount Floating rate mortgage debt Long-term Debt, Percentage Bearing Variable Interest, Amount Total mortgage debt Long Term Debt, Fixed Rate Debt and Floating Rate Debt, Less Credit Facility and Unsecured Notes, Total Long Term Debt, Fixed Rate Debt and Floating Rate Debt, Total Term loan and credit facility Long-term Line of Credit Total principal Long-term Debt, Gross Unamortized premiums, net of unamortized discount Debt Instrument, Unamortized Discount (Premium), Net Total Long-term Debt Stated Rate Debt Instrument, Interest Rate, Stated Percentage Effective Rate Debt Instrument, Interest Rate, Effective Percentage Basis spread on variable rate Debt Instrument, Basis Spread on Variable Rate Business Combinations [Abstract] Schedule of Business Acquisitions, by Acquisition [Table] Schedule of Business Acquisitions, by Acquisition [Table] Business Acquisition [Axis] Business Acquisition [Axis] Business Acquisition, Acquiree [Domain] Business Acquisition, Acquiree [Domain] 112 West 34th Street [Member] 112 West 34th Street [Member] 112 West 34th Street [Member] 1400 Broadway [Member] Location 1400 Broadway [Member] Location 1400 Broadway [Member] Series PR OP Units [Member] Series ES Operating Partnership Units [Member] Series ES Operating Partnership Units [Member] Business Acquisition [Line Items] Business Acquisition [Line Items] Total consideration paid Business Combination, Consideration Transferred Debt assumed Business Combination, Consideration Transferred, Liabilities Incurred Payments to acquire businesses, gross Payments to Acquire Businesses, Gross Consideration transferred, equity issued Business Combination, Consideration Transferred, Equity Interests Issued and Issuable Equity issued, number of shares Business Acquisition, Equity Interest Issued or Issuable, Number of Shares Business acquisition, share price Business Acquisition, Share Price Series A, Series B, and Series C Senior Unsecured Notes [Member] Series A, Series B, and Series C Senior Unsecured Notes [Member] Series A, Series B, and Series C Senior Unsecured Notes [Member] Interest expense, debt Interest Expense, Debt Contractual interest expense Interest Expense, Debt, Excluding Amortization Accretion of debt discount Amortization of Debt Discount (Premium) Amortization of deferred financing costs Amortization of Financing Costs Line of Credit Facility [Table] Line of Credit Facility [Table] Secured Revolving and Term Credit Facility [Member] Secured Revolving and Term Credit Facility [Member] Secured Revolving and Term Credit Facility [Member] Eurodollar [Member] Eurodollar [Member] Base Rate [Member] Base Rate [Member] Line of Credit Facility [Line Items] Line of Credit Facility [Line Items] Write off of deferred debt issuance cost Write off of Deferred Debt Issuance Cost Current borrowing capacity Line of Credit Facility, Current Borrowing Capacity Maximum borrowing capacity Line of Credit Facility, Maximum Borrowing Capacity Option to extend maturity, number Debt Instrument, Option to Extend, Number Debt Instrument, Option to Extend, Number Extension period Line of Credit Facility, Extension Period Line of Credit Facility, Extension Period Extension fee percent of outstanding commitments under revolving credit facility Line of Credit Facility, Extension Fee, Percent of Outstanding Commitments Under Revolving Credit Facility Line of Credit Facility, Extension Fee, Percent of Outstanding Commitments Under Revolving Credit Facility Line of Credit Facility, Covenant Compliance, Maximum Leverage Ratio Line of Credit Facility, Covenant Compliance, Maximum Leverage Ratio Line of Credit Facility, Covenant Compliance, Maximum Leverage Ratio Line of Credit Facility, Covenant Compliance, Maximum Consolidated Secured Indebtedness to Asset Value Line of Credit Facility, Covenant Compliance, Maximum Consolidated Secured Indebtedness to Asset Value Line of Credit Facility, Covenant Compliance, Maximum Consolidated Secured Indebtedness to Asset Value Line of Credit Facility, Covenant Compliance, Minimum Tangible Net Worth Line of Credit Facility, Covenant Compliance, Minimum Tangible Net Worth Line of Credit Facility, Covenant Compliance, Minimum Tangible Net Worth Line of Credit Facility, Covenant Compliance, Tangible Net Worth. Minimum Percent of Net Equity Proceeds Received Line of Credit Facility, Covenant Compliance, Tangible Net Worth. Minimum Percent of Net Equity Proceeds Received Line of Credit Facility, Covenant Compliance, Tangible Net Worth. Minimum Percent of Net Equity Proceeds Received Line of Credit Facility, Covenant Compliance, Minimum Adjusted EBITDA to Consolidated Fixed Charges Line of Credit Facility, Covenant Compliance, Minimum Adjusted EBITDA to Consolidated Fixed Charges Line of Credit Facility, Covenant Compliance, Minimum Adjusted EBITDA to Consolidated Fixed Charges Line of Credit Facility, Covenant Compliance, Minimum Net Operating Income to Unsecured Debt Line of Credit Facility, Covenant Compliance, Minimum Net Operating Income to Unsecured Debt Line of Credit Facility, Covenant Compliance, Minimum Net Operating Income to Unsecured Debt Line of Credit Facility, Covenant Compliance, Maximum Ratio of Unsecured Debt to Unencumbered Asset Value Line of Credit Facility, Covenant Compliance, Maximum Ratio of Unsecured Debt to Unencumbered Asset Value Line of Credit Facility, Covenant Compliance, Maximum Ratio of Unsecured Debt to Unencumbered Asset Value Line of Credit Facility, Covenant Compliance, Maximum Consolidated Secured Recourse Debt to Asset Value Line of Credit Facility, Covenant Compliance, Maximum Consolidated Secured Recourse Debt to Asset Value Line of Credit Facility, Covenant Compliance, Maximum Consolidated Secured Recourse Debt to Asset Value Document and Entity Information [Abstract] Document and Entity Information [Abstract] Entity Registrant Name Entity Registrant Name Entity Central Index Key Entity Central Index Key Document Type Document Type Current Fiscal Year End Date Current Fiscal Year End Date Amendment Flag Amendment Flag Document Period End Date Document Period End Date Document Fiscal Year Focus Document Fiscal Year Focus Document Fiscal Period Focus Document Fiscal Period Focus Entity Filer Category Entity Filer Category Entity Common Stock, Shares Outstanding Entity Common Stock, Shares Outstanding Schedule of Related Party Transactions, by Related Party [Table] Schedule of Related Party Transactions, by Related Party [Table] Income Statement Location [Axis] Income Statement Location [Axis] Income Statement Location [Domain] Income Statement Location [Domain] Third party management and other fees [Member] Management Fees Revenue [Member] Management Fees Revenue [Member] Related Party [Axis] Related Party [Axis] Related Party [Domain] Related Party [Domain] Affiliated Entities [Member] Affiliated Entity [Member] Related Party Transaction [Axis] Related Party Transaction [Axis] Related Party Transaction [Domain] Related Party Transaction [Domain] Supervisory Fee Revenue [Member] Supervisory Fee Revenue [Member] Supervisory Fee Revenue [Member] Property Management Fee Revenue [Member] Property Management Fee Revenue [Member] Property Management Fee Revenue [Member] Related Party Transaction [Line Items] Related Party Transaction [Line Items] Revenue from related parties Revenue from Related Parties Long-term Purchase Commitment Schedule of Future Minimum Rental Payments for Operating Leases [Table Text Block] Income Statement [Abstract] Revenues: Revenues [Abstract] Rental revenue Operating Leases, Income Statement, Lease Revenue Tenant expense reimbursement Tenant Reimbursements Observatory revenue Observatory Revenue Observatory Revenue Construction revenue Construction Revenue Third-party management and other fees Management Fees Revenue Other revenue and fees Other Real Estate Revenue Total revenues Revenues Operating expenses: Operating Expenses [Abstract] Property operating expenses Operating Costs and Expenses Ground rent expenses Ground Rent Expense Ground Rent Expense Marketing, general, and administrative expenses Selling, General and Administrative Expense Observatory expenses Observatory Expense Observatory Expense Construction expenses Construction and Development Costs Real estate taxes Real Estate Tax Expense Depreciation and amortization Depreciation, Depletion and Amortization, Nonproduction Total operating expenses Operating Expenses Total operating income Operating Income (Loss) Other income (expense): Other Income and Expenses [Abstract] Interest expense Interest Expense Income before income taxes Income (Loss) from Continuing Operations before Income Taxes, Extraordinary Items, Noncontrolling Interest Income tax benefit Income Tax Expense (Benefit) Net income Private perpetual preferred unit distributions Preferred Stock Dividends and Other Adjustments Net income attributable to non-controlling interests Net Income (Loss) Attributable to Noncontrolling Interest Net income attributable to common stockholders Total weighted average shares: Weighted Average Number of Shares Outstanding, Basic [Abstract] Basic (in shares) Weighted Average Number of Shares Outstanding, Basic Diluted (in shares) Weighted Average Number of Shares Outstanding, Diluted Earnings per share attributable to common stockholders: Earnings Per Share [Abstract] Basic (USD per share) Earnings Per Share, Basic Diluted (USD pre share) Earnings Per Share, Diluted Dividends per share Common Stock, Dividends, Per Share, Declared Deferred Costs [Table] Deferred Costs [Table] Deferred Costs [Table] Segments [Axis] Segments [Axis] Segments [Domain] Segments [Domain] Observatory, Segment [Member] Observatory, Segment [Member] Observatory, Segment [Member] Real Estate, Segment [Member] Real Estate, Segment [Member] Real Estate, Segment [Member] Finite-Lived Intangible Assets by Major Class [Axis] Finite-Lived Intangible Assets by Major Class [Axis] Finite-Lived Intangible Assets, Major Class Name [Domain] Finite-Lived Intangible Assets, Major Class Name [Domain] Lease Agreements [Member] Lease Agreements [Member] Deferred Costs [Line Items] Deferred Costs [Line Items] [Line Items] for Deferred Costs [Table] Amortization of deferred leasing costs Amortization of Deferred Leasing Fees Amortization of deferred finance costs and debt premiums Amortization expense related to acquired lease intangibles Amortization of Intangible Assets Revenue related to amortization of acquired above- and below-market leases, net Revenue Related to Amortization of above and below Market Leases Revenue Related to Amortization of above and below Market Leases Goodwill Goodwill Subsequent Events Subsequent Events [Text Block] Fair Value of Financial Instruments Fair Value Disclosures [Text Block] Schedule of Debt Schedule of Long-term Debt Instruments [Table Text Block] Schedule of Maturities of Long-term Debt Schedule of Maturities of Long-term Debt [Table Text Block] Total revenues Business Acquisition, Pro Forma Revenue Net income attributable to Empire State Realty Trust, Inc. Business Acquisition, Pro Forma Net Income (Loss) Net income attributable to Empire State Realty Trust, Inc. Business Acquisition, Pro Forma Net Income (Loss) including Portion Attributable to Noncontrolling Interest Business Acquisition, Pro Forma Net Income (Loss) including Portion Attributable to Noncontrolling Interest Net income attributable to Empire State Realty Trust, Inc. per share - basic and diluted Business Acquisition, Pro Forma Earnings Per Share, Basic and Diluted Business Acquisition, Pro Forma Earnings Per Share, Basic and Diluted Operating Leases [Table] Operating Leases [Table] Operating Leases [Table] Operating Leases [Line Items] Operating Leases [Line Items] [Line Items] for Operating Leases [Table] Term of lease Lessor Leasing Arrangements, Operating Leases, Term of Contract Accounts payable and accrued expenses Accounts Payable and Accrued Liabilities Payable to the estate of Leona M. Helmsley Other Liabilities Accrued interest payable Interest Payable Due to affiliated companies Due to Related Parties Accounts payable and accrued expenses Accounts Payable and Accrued Expenses Accounts Payable and Accrued Expenses Basis of Quarterly Presentation and Principles of Combination Basis of Accounting, Policy [Policy Text Block] Consolidation, Subsidiaries or Other Investments, Consolidated Entities Consolidation, Subsidiaries or Other Investments, Consolidated Entities, Policy [Policy Text Block] Consolidation, Variable Interest Entity Consolidation, Variable Interest Entity, Policy [Policy Text Block] Accounting Estimates Use of Estimates, Policy [Policy Text Block] Recently Issued or Adopted Accounting Standards New Accounting Pronouncements, Policy [Policy Text Block] Debt Debt Disclosure [Text Block] Numerator: Numerator [Abstract] Numerator [Abstract] Net income Net income attributable to non-controlling interests Earnings allocated to unvested shares Undistributed Earnings (Loss) Allocated to Participating Securities, Basic Net income 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 Earnings allocated to unvested shares and LTIP units Undistributed Earnings (Loss) Allocated to Participating Securities, Diluted Net income attributable to common stockholders - diluted Net Income (Loss), Excluding Portion Attributable to Noncontrolling Interest and Participating Securities, Diluted Net Income (Loss), Excluding Portion Attributable to Noncontrolling Interest and Participating Securities, Diluted Denominator: Denominator [Abstract] Denominator [Abstract] Weighted average shares outstanding - basic Operating partnership units Weighted Average Number Diluted Shares Outstanding Adjustment Weighted average shares outstanding - diluted Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount Deferred Costs, Acquired Lease Intangibles and Goodwill Other Assets Disclosure [Text Block] Unfunded capital expenditures Unfunded Capital Expenditures Unfunded Capital Expenditures Summary of Significant Accounting Policies Significant Accounting Policies [Text Block] Schedule of Segment Reporting Information, by Segment [Table] Schedule of Segment Reporting Information, by Segment [Table] Other Segments [Member] Other Segments [Member] Consolidation Items [Axis] Consolidation Items [Axis] Consolidation Items [Domain] Consolidation Items [Domain] Operating Segments [Member] Operating Segments [Member] Intersegment Eliminations [Member] Intersegment Eliminations [Member] Segment Reporting Information [Line Items] Segment Reporting Information [Line Items] Intercompany rental revenue Intercompany Rental Revenue Intercompany Rental Revenue Intercompany rent expense Intercompany Rent Expense Intercompany Rent Expense Depreciation and amortization Interest expense Income tax (expense) benefit Segment assets Assets Expenditures for segment assets Payments to Acquire Productive Assets Number of reportable segments Number of Reportable Segments Schedule of Deferred Costs, Net Deferred Costs, Capitalized, Prepaid, and Other Assets Disclosure [Table Text Block] 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] Statement of Financial Position [Abstract] ASSETS Assets [Abstract] Commercial real estate properties, at cost: Real Estate Investment Property, at Cost [Abstract] Land Land Development costs Development in Process Building and improvements Investment Building and Building Improvements Commercial real estate properties, at cost, gross Real Estate Investment Property, at Cost Less: accumulated depreciation Real Estate Investment Property, Accumulated Depreciation Commercial real estate properties, net Real Estate Investment Property, Net Cash and cash equivalents Cash and Cash Equivalents, at Carrying Value Restricted cash Restricted Cash and Cash Equivalents Tenant and other receivables, net of allowance of $2,803 and $1,427 in 2015 and 2014, respectively Accounts and Notes Receivable, Net Deferred rent receivables, net of allowance of $437 and $420 in 2015 and 2014, respectively Deferred Rent Receivables, Net Prepaid expenses and other assets Prepaid Expense and Other Assets Deferred costs, net Deferred Costs Acquired below-market ground leases, net Ground Leases, Net Acquired lease intangibles, net Finite-Lived Intangible Assets, Net Total assets LIABILITIES AND EQUITY Liabilities and Equity [Abstract] Liabilities: Liabilities [Abstract] Mortgage notes payable Senior unsecured notes Convertible Debt Unsecured revolving credit facility Unsecured Debt Accounts payable and accrued expenses Acquired below-market leases, net Below Market Lease, Net Deferred revenue and other liabilities Deferred Revenue and Other Liabilities Deferred Revenue and Other Liabilities Tenants’ security deposits Security Deposit Liability Total liabilities Liabilities Commitments and Contingencies Commitments and Contingencies Equity: Empire State Realty Trust, Inc. stockholders' equity: Stockholders' Equity Attributable to Parent [Abstract] Preferred stock, $0.01 par value per share, 50,000,000 shares authorized, none issued or outstanding Preferred Stock, Value, Issued Common stock Common Stock, Value, Issued Additional paid-in capital Additional Paid in Capital Retained earnings Retained Earnings (Accumulated Deficit) Total Empire State Realty Trust, Inc.'s stockholders' equity Stockholders' Equity Attributable to Parent Private perpetual preferred units, $16.62 per unit liquidation preference, 1,560,360 issued and outstanding in 2015 and 2014 Private Perpetual Preferred Units, Issued, Value Private Perpetual Preferred Units, Issued, Value Non-controlling interests in operating partnership Stockholders' Equity Attributable to Noncontrolling Interest Total equity Total liabilities and equity Liabilities and Equity Preferred Unit, Liquidation Preference Private Perpetual Preferred Units, Liquidation Preference Per Share Private Perpetual Preferred Units, Liquidation Preference Per Share Stock issued Private Perpetual Preferred Units, Issued, Shares Private Perpetual Preferred Units, Issued, Shares Tenant and other receivables allowance Allowance for Doubtful Accounts Receivable Deferred rent receivables allowance Allowance for Deferred Rent Receivables Allowance for Deferred Rent Receivables Common stock, par value Common Stock, Par or Stated Value Per Share Common stock, shares authorized Common Stock, Shares Authorized Common stock, shares issued Common Stock, Shares, Issued Common stock, shares outstanding Preferred stock, par value Preferred Stock, Par or Stated Value Per Share Preferred stock, shares authorized Preferred Stock, Shares Authorized Preferred stock, shares issued Preferred Stock, Shares Issued Preferred stock, shares outstanding Preferred Stock, Shares Outstanding Capital Units, Outstanding Private Perpetual Preferred Units, Outstanding, Shares Private Perpetual Preferred Units, Outstanding, Shares Business Acquisition, Pro Forma Information Business Acquisition, Pro Forma Information [Table Text Block] Equity Stockholders' Equity Note Disclosure, Disclosure of Compensation Related Costs, Share-based Payments and Earnings Per Share [Text Block] Stockholders' Equity Note Disclosure, Disclosure of Compensation Related Costs, Share-based Payments and Earnings Per Share [Text Block] Total revenues Business Combination, Pro Forma Information, Revenue of Acquiree since Acquisition Date, Actual Operating expenses Business Combination, Pro Forma Information, Operating Expenses of Acquiree since Acquisition Date, Actual Business Combination, Pro Forma Information, Operating Expenses of Acquiree since Acquisition Date, Actual Operating loss Business Combination, Pro Forma Information, Operating Income (Loss) of Acquiree since Acquisition Date, Actual Business Combination, Pro Forma Information, Operating Income (Loss) of Acquiree since Acquisition Date, Actual Net loss attributable to common stockholders Business Combination, Pro Forma Information, Earnings or Loss of Acquiree since Acquisition Date, Actual Organization, Consolidation and Presentation of Financial Statements [Abstract] 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] Real Estate, Type of Property [Axis] Real Estate, Type of Property [Axis] Real Estate [Domain] Real Estate [Domain] Office Building [Member] Office Building [Member] Development Parcel [Member] Development Parcel [Member] Development Parcel [Member] Retail Site [Member] Retail Site [Member] Other Property [Member] Other Property [Member] Geographical [Axis] Geographical [Axis] Geographical [Domain] Geographical [Domain] Manhattan and Westport, Connecticut [Member] Manhattan and Westport, Connecticut [Member] Manhattan and Westport, Connecticut [Member] Manhattan [Member] Manhattan [Member] Manhattan [Member] Westport, Connecticut [Member] Westport, Connecticut [Member] Westport, Connecticut [Member] Fairfield County, Connecticut and Westchester County, New York [Member] Fairfield County, Connecticut and Westchester County, New York [Member] Fairfield County, Connecticut and Westchester County, New York [Member] Stamford, Connecticut [Member] Stamford, Connecticut [Member] Stamford, Connecticut [Member] Organization, Consolidation and Presentation of Financial Statements Disclosure [Line Items] Organization, Consolidation and Presentation of Financial Statements Disclosure [Line Items] [Line Items] for Organization, Consolidation and Presentation of Financial Statements Disclosure [Table] Area of real estate property Area of Real Estate Property Number of properties Number of Real Estate Properties Acquisitions Business Combination Disclosure [Text Block] Description of Business and Organization Organization, Consolidation and Presentation of Financial Statements Disclosure [Text Block] 2015, amortization Long-term Debt, Maturities, Repayments of Principal in Next Twelve Months, Portion Attributable to Amortization Long-term Debt, Maturities, Repayments of Principal in Next Twelve Months, Portion Attributable to Amortization 2016, amortization Long-term Debt, Maturities, Repayments of Principal in Year Two, Portion Attributable to Amortization Long-term Debt, Maturities, Repayments of Principal in Year Two, Portion Attributable to Amortization 2017, amortization Long-term Debt, Maturities, Repayments of Principal in Year Three, Portion Attributable to Amortization Long-term Debt, Maturities, Repayments of Principal in Year Three, Portion Attributable to Amortization 2018, amortization Long-term Debt, Maturities, Repayments of Principal in Year Four, Portion Attributable to Amortization Long-term Debt, Maturities, Repayments of Principal in Year Four, Portion Attributable to Amortization 2019, amortization Long-term Debt, Maturities, Repayments of Principal in Year Five, Portion Attributable to Amortization Long-term Debt, Maturities, Repayments of Principal in Year Five, Portion Attributable to Amortization 2020 and thereafter, amortization Long-term Debt, Maturities, Repayments of Principal after Year Five, Portion Attributable to Amortization Long-term Debt, Maturities, Repayments of Principal after Year Five, Portion Attributable to Amortization Total, amortization Long-term Debt, Maturities, Repayments of Principal, Portion Attributable to Amortization Long-term Debt, Maturities, Repayments of Principal, Portion Attributable to Amortization 2015, maturities Long-term Debt, Maturities, Repayments of Principal in Next Twelve Months, Principal Maturities Long-term Debt, Maturities, Repayments of Principal in Next Twelve Months, Principal Maturities 2016, maturities Long-term Debt, Maturities, Repayments of Principal in Year Two, Principal Maturities Long-term Debt, Maturities, Repayments of Principal in Year Two, Principal Maturities 2017, maturities Long-term Debt, Maturities, Repayments of Principal in Year Three, Principal Maturities Long-term Debt, Maturities, Repayments of Principal in Year Three, Principal Maturities 2018, maturities Long-term Debt, Maturities, Repayments of Principal in Year Four, Principal Maturities Long-term Debt, Maturities, Repayments of Principal in Year Four, Principal Maturities 2019, maturities Long-term Debt, Maturities, Repayments of Principal in Year Five, Principal Maturities Long-term Debt, Maturities, Repayments of Principal in Year Five, Principal Maturities 2022, maturities Long-term Debt, Maturities, Repayments of Principal after Year Five, Principal Maturities Long-term Debt, Maturities, Repayments of Principal after Year Five, Principal Maturities Total, maturities Long-term Debt, Maturities, Repayments of Principal, Principal Maturities Long-term Debt, Maturities, Repayments of Principal, Principal Maturities 2015 Long-term Debt, Maturities, Repayments of Principal in Next Twelve Months 2016 Long-term Debt, Maturities, Repayments of Principal in Year Two 2017 Long-term Debt, Maturities, Repayments of Principal in Year Three 2018 Long-term Debt, Maturities, Repayments of Principal in Year Four 2019 Long-term Debt, Maturities, Repayments of Principal in Year Five 2020 and thereafter Long-term Debt, Maturities, Repayments of Principal after Year Five Total Commitments and Contingencies Commitments and Contingencies Disclosure [Text Block] Schedule of Operating Leased Assets [Table] Schedule of Operating Leased Assets [Table] Lease Arrangement, Type [Axis] Lease Arrangement, Type [Axis] Lease Arrangement, Type [Domain] Lease Arrangement, Type [Domain] Ground Lease [Member] Ground Lease [Member] Ground Lease [Member] Operating Leased Assets [Line Items] Operating Leased Assets [Line Items] 2015 Operating Leases, Future Minimum Payments, Remainder of Fiscal Year 2016 Operating Leases, Future Minimum Payments, Due in Two Years 2017 Operating Leases, Future Minimum Payments, Due in Three Years 2018 Operating Leases, Future Minimum Payments, Due in Four Years 2019 Operating Leases, Future Minimum Payments, Due in Five Years Thereafter Operating Leases, Future Minimum Payments, Due Thereafter Aggregate required payments on ground leases Operating Leases, Future Minimum Payments Due Statement of Cash Flows [Abstract] Cash Flows From Operating Activities Net Cash Provided by (Used in) Operating Activities [Abstract] Adjustments to reconcile net income to net cash provided by operating activities: Adjustments to Reconcile Net Income (Loss) to Cash Provided by (Used in) Operating Activities [Abstract] Depreciation and amortization Depreciation, Depletion and Amortization Amortization of deferred finance costs and debt premiums and discount Amortization of Financing Costs and Debt Premium Amortization of Financing Costs and Debt Premium Amortization of acquired above- and below-market leases, net Amortization of above and below Market Leases Amortization of acquired below-market ground leases Amortization of below Market Ground Lease Amortization of below Market Ground Lease Straight-lining of rental revenue Straight Line Rent Equity based compensation Share-based Compensation Increase (decrease) in cash flows due to changes in operating assets and liabilities: Increase (Decrease) in Operating Capital [Abstract] Restricted cash Increase (Decrease) in Restricted Cash for Operating Activities Tenant and other receivables Increase (Decrease) in Accounts Receivable Deferred leasing costs Increase (Decrease) in Deferred Leasing Fees Prepaid expenses and other assets Increase (Decrease) in Prepaid Expense and Other Assets Accounts payable and accrued expenses Increase (Decrease) in Accounts Payable and Accrued Expenses Increase (Decrease) in Accounts Payable and Accrued Expenses Deferred revenue and other liabilities Increase (Decrease) in Deferred Revenue and Other Liabilities Increase (Decrease) in Deferred Revenue and Other Liabilities Net cash provided by operating activities Net Cash Provided by (Used in) Operating Activities Cash Flows From Investing Activities Net Cash Provided by (Used in) Investing Activities [Abstract] Decrease in restricted cash for investing activities Increase (Decrease) in Restricted Cash Development costs Development Costs, Investing Activity Development Costs, Investing Activity Additions to building and improvements Payments for Capital Improvements Net cash used in investing activities Net Cash Provided by (Used in) Investing Activities Cash Flows From Financing Activities Net Cash Provided by (Used in) Financing Activities [Abstract] Repayment of mortgage notes payable Repayments of Long-term Debt Proceeds from unsecured revolving credit facility Proceeds from Unsecured Notes Payable Repayments of unsecured revolving credit facility Repayments of Unsecured Debt Proceeds from term loan and credit facility Proceeds from Lines of Credit Repayments of term loan and credit facility Repayments of Lines of Credit Proceeds from senior unsecured notes Proceeds from Issuance of Senior Long-term Debt Deferred financing costs and equity issuance costs Payments of Financing Costs Private perpetual preferred unit distributions Dividends paid to common stockholders Payments of Dividends Distributions paid to non-controlling interests in the operating partnership Payments of Ordinary Dividends, Noncontrolling Interest Net cash used in financing activities Net Cash Provided by (Used in) Financing Activities Net decrease in cash and cash equivalents Cash and Cash Equivalents, Period Increase (Decrease) Cash and cash equivalents—beginning of period Cash and cash equivalents—end of period Supplemental disclosures of cash flow information: Supplemental Cash Flow Information [Abstract] Cash paid for interest Interest Paid Cash paid for income taxes Income Taxes Paid Non-cash investing and financing activities: Cash Flow, Noncash Investing and Financing Activities Disclosure [Abstract] Commercial real estate properties included in accounts payable and accrued expenses Commercial Real Estate Incurred but Not yet Paid Commercial Real Estate Incurred but Not yet Paid Conversion of operating partnership units and Class B shares to Class A shares Conversion of Stock, Amount Converted Schedule of the aggregate carrying value of debt and estimates of fair value Fair Value, by Balance Sheet Grouping [Table Text Block] Schedule of Acquired Finite-Lived Intangible Asset by Major Class [Table] Schedule of Acquired Finite-Lived Intangible Asset by Major Class [Table] Acquired in-place lease value and deferred leasing costs [Member] Acquired In Place Lease Value And Deferred Leasing Costs [Member] Acquired In Place Lease Value And Deferred Leasing Costs [Member] Acquired above-market leases [Member] Above Market Leases [Member] Acquired Finite-Lived Intangible Assets [Line Items] Acquired Finite-Lived Intangible Assets [Line Items] Acquired below-market ground lease, Gross Amount Ground Leases, Gross Acquired below-market ground lease, Accumulated Amortization Ground Leases, Accumulated Amortization Finite-lived intangible assets, Gross Amount Finite-Lived Intangible Assets, Gross Finite-lived intangible assets, Accumulated Amortization Finite-Lived Intangible Assets, Accumulated Amortization Acquired below-market leases, Gross Amount Below Market Lease, Gross Acquired below-market leases, Accumulated Amortization Below Market Lease, Accumulated Amortization