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Related Party Transactions - Tax Protection Agreement (Details) - Malkin Group [Member] $ in Millions | Oct. 07, 2013 USD ($) property
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Related Party Transaction [Line Items] |
Number of properties protected | property | 4
Aggregate number of operating partnership units and common stock threshold during tax protection period | 50.00%
Bottom dollar guarantee of aggregate indebtedness during tax protection period | $ | $ 160.0

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- Definition Related Party Transaction, Aggregate Number of Operating Partnership Units and Common Stock Threshold During Tax Protection Period + References No definition available. + Details
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Namespace Prefix: | esrt_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration

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- Definition Related Party Transaction, Bottom Dollar Guarantee of Aggregate Indebtedness During tax Protection Period + References No definition available. + Details
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Namespace Prefix: | esrt_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

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- Definition Related Party Transaction, Number of Properties Protected + References No definition available. + Details
Name: | esrt_RelatedPartyTransactionNumberofPropertiesProtected
Namespace Prefix: | esrt_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | duration

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- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References No definition available. + Details
Name: | us-gaap_RelatedPartyTransactionLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

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- Details
Name: | us-gaap_RelatedPartyTransactionsByRelatedPartyAxis=esrt_MalkinGroupMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |