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v3.21.1

Transactions with Norfolk Southern Railway Company (Details) - USD ($) |  | 3 Months Ended | 12 Months Ended |
--- | --- | --- | --- | ---
Mar. 01, 2019 | Mar. 31, 2021 | Mar. 31, 2020 | Dec. 31, 2019 | Dec. 31, 2018 | Dec. 31, 2020
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |  |  |  |  |  |
Assets |  | $ 7,106,182,000 |  |  |  | $ 7,107,398,000
Contract price that is expected to be recognized as revenue | $ 52,300,000 |  |  |  |  |
Deferred income |  | 76,033,000 |  |  |  | 62,319,000
NS |  |  |  |  |  |
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |  |  |  |  |  |
Revenue recognized |  | 3,700,000 | $ 3,700,000 |  |  |
Deferred income |  | $ 4,300,000 |  |  |  | $ 5,700,000
1200 Peachtree |  |  |  |  |  |
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |  |  |  |  |  |
Assets | 92,300,000 |  |  |  |  |
Land |  |  |  |  |  |
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |  |  |  |  |  |
Property purchased |  |  |  | $ 6,500,000 | $ 37,000,000 |
Site Preparation Work |  |  |  |  |  |
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |  |  |  |  |  |
Property purchased | 4,000,000 |  |  |  |  |
NS | 1200 Peachtree |  |  |  |  |  |
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |  |  |  |  |  |
Purchase of a building | $ 82,000,000 |  |  |  |  |
Lease term | 3 years |  |  |  |  |
Discount on service contract price | $ 10,300,000 |  |  |  |  |
Gain or loss on derecognition of non financial asset fair value | 0 |  |  |  |  |
Consideration for the various services component | 52,300,000 |  |  |  |  |
NS | Fees for development services |  |  |  |  |  |
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |  |  |  |  |  |
Contract fees | 5,000,000 |  |  |  |  |
NS | Fees for consulting services |  |  |  |  |  |
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |  |  |  |  |  |
Contract fees | 32,000,000 |  |  |  |  |
NS | Development agreement | 1200 Peachtree |  |  |  |  |  |
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |  |  |  |  |  |
Cash consideration for various services contract | 5,000,000 |  |  |  |  |
NS | Consulting agreement | 1200 Peachtree |  |  |  |  |  |
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |  |  |  |  |  |
Cash consideration for various services contract | 32,000,000 |  |  |  |  |
NS | Land |  |  |  |  |  |
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |  |  |  |  |  |
Proceeds from sale of property | 52,500,000 |  |  |  |  |
Gain from sale of property | 5,000,000 |  |  |  |  |
NS | Land | 1200 Peachtree |  |  |  |  |  |
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |  |  |  |  |  |
Cash consideration for various services contract | $ 5,000,000 |  |  |  |  |

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