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Description of Business and Organization The Predecessor Narrative (Details) | Dec. 31, 2014 sqft
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Organization, Consolidation and Presentation of Financial Statements Disclosure [Line Items] |
Area of real estate property | 10,000,000 us-gaap_AreaOfRealEstateProperty
Predecessor [Member] |
Organization, Consolidation and Presentation of Financial Statements Disclosure [Line Items] |
Area of real estate property | 380,000 us-gaap_AreaOfRealEstateProperty / us-gaap_StatementScenarioAxis = us-gaap_PredecessorMember
Predecessor [Member] | Office and Retail Properties [Member] |
Organization, Consolidation and Presentation of Financial Statements Disclosure [Line Items] |
Number of offices and properties | 18 us-gaap_NumberOfRealEstateProperties / us-gaap_MortgageLoansOnRealEstateDescriptionTypeOfPropertyAxis = esrt_OfficeandRetailPropertiesMember / us-gaap_StatementScenarioAxis = us-gaap_PredecessorMember
Predecessor [Member] | Office and Retail Properties [Member] | Consolidated Properties [Member] |
Organization, Consolidation and Presentation of Financial Statements Disclosure [Line Items] |
Number of offices and properties | 16 us-gaap_NumberOfRealEstateProperties / us-gaap_MortgageLoansOnRealEstateDescriptionTypeOfPropertyAxis = esrt_OfficeandRetailPropertiesMember / us-gaap_RealEstatePropertiesAxis = us-gaap_ConsolidatedPropertiesMember / us-gaap_StatementScenarioAxis = us-gaap_PredecessorMember
Predecessor [Member] | Office and Retail Properties [Member] | Unconsolidated Properties [Member] |
Organization, Consolidation and Presentation of Financial Statements Disclosure [Line Items] |
Number of offices and properties | 2 us-gaap_NumberOfRealEstateProperties / us-gaap_MortgageLoansOnRealEstateDescriptionTypeOfPropertyAxis = esrt_OfficeandRetailPropertiesMember / us-gaap_RealEstatePropertiesAxis = us-gaap_UnconsolidatedPropertiesMember / us-gaap_StatementScenarioAxis = us-gaap_PredecessorMember
Predecessor [Member] | Development Parcel [Member] | Consolidated Properties [Member] |
Organization, Consolidation and Presentation of Financial Statements Disclosure [Line Items] |
Number of offices and properties | 1 us-gaap_NumberOfRealEstateProperties / us-gaap_MortgageLoansOnRealEstateDescriptionTypeOfPropertyAxis = esrt_DevelopmentParcelMember / us-gaap_RealEstatePropertiesAxis = us-gaap_ConsolidatedPropertiesMember / us-gaap_StatementScenarioAxis = us-gaap_PredecessorMember
Predecessor [Member] | Office Properties [Member] | Unconsolidated Properties [Member] |
Organization, Consolidation and Presentation of Financial Statements Disclosure [Line Items] |
Number of offices and properties | 4 us-gaap_NumberOfRealEstateProperties / us-gaap_MortgageLoansOnRealEstateDescriptionTypeOfPropertyAxis = esrt_OfficePropertiesMember / us-gaap_RealEstatePropertiesAxis = us-gaap_UnconsolidatedPropertiesMember / us-gaap_StatementScenarioAxis = us-gaap_PredecessorMember
Area of real estate property | 380,000 us-gaap_AreaOfRealEstateProperty / us-gaap_MortgageLoansOnRealEstateDescriptionTypeOfPropertyAxis = esrt_OfficePropertiesMember / us-gaap_RealEstatePropertiesAxis = us-gaap_UnconsolidatedPropertiesMember / us-gaap_StatementScenarioAxis = us-gaap_PredecessorMember

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- Details
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Namespace Prefix: | esrt_
Data Type: | xbrli:stringItemType
Balance Type: | na
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- Definition Area of a real estate property. + References No definition available. + Details
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Namespace Prefix: | us-gaap_
Data Type: | num:areaItemType
Balance Type: | na
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- Definition The number of real estate properties owned as of the balance sheet date. + References No definition available. + Details
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Namespace Prefix: | us-gaap_
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Balance Type: | na
Period Type: | instant

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