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Real Estate Investments (Details) $ in Thousands, ft² in Millions | 12 Months Ended
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Dec. 31, 2021 USD ($) ft² site item state property | Dec. 31, 2020 USD ($) ft² item property site state | Dec. 31, 2019 USD ($)
Real Estate Investments |  |  |
Number of Real Estate Properties | property | 1,404 | 1,129 |
Land Subject to Ground Leases | ft² | 29.1 | 22.7 |
Net Real Estate Investments | $ 4,367,111 | $ 3,304,179 |
Retail Net Lease Assets Purchased | item | 290 | 317 |
Payments to Acquire Property, Plant, and Equipment | $ 1,390,000 | $ 1,310,000 |
Number Of States Properties Located | state | 43 | 39 |
Acquired Finite-lived Intangible Assets, Weighted Average Useful Life (in year) | 11 years 6 months | 11 years 3 months 18 days |
Payments to Acquire Land Held-for-use | $ 476,800 | $ 386,900 |
Payments for Capital Improvements | 654,300 | 768,200 |
Payments to Acquire Intangible Assets | 250,700 | $ 158,100 |
Payments to Acquire Other Productive Assets | $ 8,800 |  |
Number Of Development And Partner Capital Solutions Projects Completed | site | 4 | 9 |
Number of Development and Partner Capital Solutions Projects Construction | site | 3 |  |
Proceeds from Sale of Real Estate | $ 56,000 | $ 47,700 | $ 65,500
Gains on Sales of Investment Real Estate | 14,900 | 8,000 | 13,300
Provision for impairment | 1,919 | 4,137 | 1,609
Impaired Real Estate Estate Fair Value | $ 1,000 | $ 11,900 | $ 3,000

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