Investments in Real Estate - Schedule of Land Held for Development (Details) $ in Thousands	3 Months Ended
	Mar. 31, 2023 USD ($) a	Dec. 31, 2022 USD ($)
Real Estate [Line Items]
GAAP Investment Balance as of 3/31/2023	$ 84,507	$ 84,412
Real Estate Investment
Real Estate [Line Items]
Approx. Developable Acres | a	450
GAAP Investment Balance as of 3/31/2023	$ 84,507
LXP Amount Funded as of 3/31/2023	$ 80,095
Reems & Olive | Phoenix, AZ | Real Estate Investment
Real Estate [Line Items]
Project (% owned)	95.50%
Approx. Developable Acres | a	320
GAAP Investment Balance as of 3/31/2023	$ 77,473
LXP Amount Funded as of 3/31/2023	$ 74,109
Mt. Comfort Phase II | Indianapolis, IN | Real Estate Investment
Real Estate [Line Items]
Project (% owned)	80.00%
Approx. Developable Acres | a	116
GAAP Investment Balance as of 3/31/2023	$ 5,303
LXP Amount Funded as of 3/31/2023	$ 4,250
ATL Fairburn JV | Atlanta, GA | Real Estate Investment
Real Estate [Line Items]
Project (% owned)	100.00%
Approx. Developable Acres | a	14
GAAP Investment Balance as of 3/31/2023	$ 1,731
LXP Amount Funded as of 3/31/2023	$ 1,736