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Deferred Costs, Acquired Lease Intangibles and Goodwill - Narrative (Details) - USD ($) $ in Thousands | 3 Months Ended |  |
--- | --- | --- | ---
Mar. 31, 2021 | Mar. 31, 2020 | Dec. 31, 2020 | Jun. 30, 2020
Deferred Costs [Line Items] |  |  |  |
Amortization expense related to deferred leasing costs | $ 5,600 | $ 5,900 |  |
Rental revenue related to amortization of below-market leases, net of above-market leases | 654 | 908 |  |
Goodwill | 491,479 |  | $ 491,479 |
Observatory |  |  |  |
Deferred Costs [Line Items] |  |  |  |
Fair value in excess of carrying value (less than) (as a percent) |  |  |  | 10.00%
Observatory |  |  |  |
Deferred Costs [Line Items] |  |  |  |
Goodwill | 227,500 |  |  |
Real estate |  |  |  |
Deferred Costs [Line Items] |  |  |  |
Goodwill | 264,000 |  |  |
Lease agreements |  |  |  |
Deferred Costs [Line Items] |  |  |  |
Amortization expense related to acquired lease intangibles | 1,700 | $ 2,000 |  |
Unsecured revolving credit facility | Revolving credit facility |  |  |  |
Deferred Costs [Line Items] |  |  |  |
Net deferred financing costs | $ 8,900 |  | $ 2,100 |

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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 -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=121586364&loc=d3e3602-108585 + Details
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- Definition The aggregate expense charged against earnings to allocate the cost of intangible assets (nonphysical assets not used in production) in a systematic and rational manner to the periods expected to benefit from such assets. As a noncash expense, this element is added back to net income when calculating cash provided by or used in operations using the indirect method. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=121586364&loc=d3e3602-108585 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 50 -Paragraph 2 -Subparagraph (a)(2) -URI http://asc.fasb.org/extlink&oid=66006027&loc=d3e16323-109275 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 45 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6388964&loc=d3e16225-109274 + Details
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