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Investments in Real Estate - Land Held for Development (Details) $ in Thousands | 12 Months Ended |
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Dec. 31, 2022 USD ($) a extensionOption acre | Dec. 31, 2021 USD ($)
Real Estate [Line Items] |  |
GAAP Investment Balance as of 12/31/2022 | $ 84,412 | $ 104,160
Real Estate Investment |  |
Real Estate [Line Items] |  |
Approx. Developable Acres (unaudited) | a | 450 |
GAAP Investment Balance as of 12/31/2022 | $ 84,412 |
LXP Amount Funded as of 12/31/2022 | $ 79,906 |
Reems & Olive | Phoenix, AZ | Real Estate Investment |  |
Real Estate [Line Items] |  |
Approx. Developable Acres (unaudited) | a | 320 |
GAAP Investment Balance as of 12/31/2022 | $ 77,379 |
LXP Amount Funded as of 12/31/2022 | $ 73,957 |
Project ownership percentage | 95.50% |
Number of leased acres | acre | 100 |
Number of acres | acre | 420 |
Lease term | 20 years |
Number of lease extension options | extensionOption | 3 |
Real estate investment property, lease extension term | 10 years |
Initial annual rental payments | $ 5,228 |
Increase in annual rental payments, percent | 0.04 |
Mt. Comfort Phase II | Indianapolis, IN | Real Estate Investment |  |
Real Estate [Line Items] |  |
Approx. Developable Acres (unaudited) | a | 116 |
GAAP Investment Balance as of 12/31/2022 | $ 5,301 |
LXP Amount Funded as of 12/31/2022 | $ 4,213 |
Project ownership percentage | 80.00% |
Fairburn JV | Atlanta, GA | Real Estate Investment |  |
Real Estate [Line Items] |  |
Approx. Developable Acres (unaudited) | a | 14 |
GAAP Investment Balance as of 12/31/2022 | $ 1,732 |
LXP Amount Funded as of 12/31/2022 | $ 1,736 |
Project ownership percentage | 100.00% |

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- Definition Carrying amount net of impairment reserves as of the balance sheet date primarily consisting of deposits for land purchases (including option payments), related acquisition costs, and land which is not expected to be developed in the next two years. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(6)(a)) -URI https://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682 + Details
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