XML 23 R50.htm IDEA: XBRL DOCUMENT
v2.4.0.8

Rental Income (Details) | 9 Months Ended
--- | ---
Sep. 30, 2014
Minimum [Member] |
Operating Leases [Line Items] |
Term of lease | 1 year
Maximum [Member] |
Operating Leases [Line Items] |
Term of lease | 18 years

X
- Details
Name: | esrt_OperatingLeasesLineItems
Namespace Prefix: | esrt_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Term of the lessor's leasing arrangement, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. + References No definition available. + Details
Name: | us-gaap_LessorLeasingArrangementsOperatingLeasesTermOfContract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration