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Real Estate Portfolio (Details) $ in Thousands | 3 Months Ended | 6 Months Ended |
--- | --- | --- | ---
Jun. 30, 2020 USD ($) ft² property state item | Jun. 30, 2019 USD ($) | Jun. 30, 2020 USD ($) ft² item property state | Jun. 30, 2019 USD ($) | Dec. 31, 2019 USD ($) ft² state
Real Estate Portfolio |  |  |  |  |
Number of Real Estate Properties | 936 |  | 936 |  | 821
Number of states | state | 46 |  | 46 |  | 46
Land Subject to Ground Leases | ft² | 18,400,000 |  | 18,400,000 |  | 14,600,000
Net Real Estate Investments | $ 2,643,131 |  | $ 2,643,131 |  | $ 2,218,592
Payments to Acquire Property, Plant, and Equipment | $ 272,500 |  | $ 499,500 |  |
Acquired Finite-lived Intangible Assets, Weighted Average Useful Life (in year) | 10 years 10 months 24 days |  | 11 years |  |
Deferred Revenue | $ 1,600 |  | $ 1,600 |  | $ 4,100
Retail Net Lease Assets Purchased | 75 |  | 126 |  |
Number Of Development And Partner Capital Solutions Projects Completed | item |  |  | 2 |  |
Number of Development and Partner Capital Solutions Projects Construction | item | 1 |  | 4 |  |
Number Of States Properties Located | 26 |  | 33 |  |
Number of Contracts or Customers Comprising Ten Percent or More Of Company's Total Assets or Total Rent |  |  | 0 |  |
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Land | $ 123,500 |  | $ 123,500 |  |
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Buildings | 338,800 |  | 338,800 |  |
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Intangible Assets, Other than Goodwill | $ 37,200 |  | $ 37,200 |  |
Number of properties sold | property | 8 |  | 14 |  |
Proceeds from Sale of Real Estate | $ 18,200 |  | $ 42,600 |  |
Gains (Losses) on Sales of Investment Real Estate | 5,000 |  | 6,600 |  |
Provision for impairment | 1,128 | $ 1,193 | 1,128 | $ 1,609 |
Impaired Real Estate Estate Fair Value | $ 7,400 |  | $ 7,400 |  |

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- Definition Amount of real estate investment property, net of accumulated depreciation, which may include the following: (1) land available-for-sale; (2) land available-for-development; (3) investments in building and building improvements; (4) tenant allowances; (5) developments in-process; (6) rental properties; and (7) other real estate investments. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-03.1(d)) -URI http://asc.fasb.org/extlink&oid=119400593&loc=d3e572229-122910 + Details
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