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Deferred Costs, Acquired Lease Intangibles and Goodwill - Narrative (Details) - USD ($) $ in Thousands | 12 Months Ended |
--- | --- | ---
Dec. 31, 2023 | Dec. 31, 2022 | Dec. 31, 2021 | Dec. 31, 2013
Deferred Costs [Line Items] |  |  |  |
Amortization of deferred leasing and acquired deferred leasing costs | $ 23,600 | $ 25,400 | $ 28,600 |
Amortization of acquired above and below-market leases, net | 2,415 | 4,759 | 5,896 |
Goodwill | 491,479 | 491,479 |  |
Empire State Building observatory operations |  |  |  |
Deferred Costs [Line Items] |  |  |  |
Goodwill |  |  |  | $ 227,500
Empire State Building |  |  |  |
Deferred Costs [Line Items] |  |  |  |
Goodwill |  |  |  | 250,800
501 Seventh Avenue |  |  |  |
Deferred Costs [Line Items] |  |  |  |
Goodwill |  |  |  | $ 13,200
Future Amortization Expense |  |  |  |
Deferred Costs [Line Items] |  |  |  |
Amortization expense related to acquired lease intangibles | $ 7,400 | 11,800 | $ 10,500 |
Future Ground Rent Amortization |  |  |  |
Deferred Costs [Line Items] |  |  |  |
Weighted-average amortization period (in years) | 22 years 2 months 12 days |  |  |
In-place leases and deferred leasing costs |  |  |  |
Deferred Costs [Line Items] |  |  |  |
Weighted-average amortization period (in years) | 3 years 4 months 24 days |  |  |
Above-market leases |  |  |  |
Deferred Costs [Line Items] |  |  |  |
Weighted-average amortization period (in years) | 3 years 6 months |  |  |
Below-market Lease |  |  |  |
Deferred Costs [Line Items] |  |  |  |
Weighted-average amortization period (in years) | 2 years 10 months 24 days |  |  |
Revolving Credit Facility | Credit Facility - Revolving Credit Facility |  |  |  |
Deferred Costs [Line Items] |  |  |  |
Net deferred financing costs | $ 2,900 | $ 5,000 |  |

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- Definition Weighted average amortization period of finite-lived intangible assets acquired either individually or as part of a group of assets, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Topic 350 -SubTopic 30 -Name Accounting Standards Codification -Section 50 -Paragraph 1 -Subparagraph (a)(3) -Publisher FASB -URI https://asc.fasb.org//1943274/2147482665/350-30-50-1 + Details
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- Definition Amount of non-cash amortization of intangible asset (liability) for above and below market leases. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 230 -SubTopic 10 -Name Accounting Standards Codification -Section 45 -Paragraph 28 -Subparagraph (b) -Publisher FASB -URI https://asc.fasb.org//1943274/2147482740/230-10-45-28 + Details
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