Investments in Real Estate - Land Held for Development (Details) $ in Thousands	3 Months Ended	12 Months Ended
	Dec. 31, 2023 USD ($) a	Dec. 31, 2023 USD ($) a	Dec. 31, 2022 USD ($)
Real Estate [Line Items]
Approximate Acres (unaudited) | a	450	450
GAAP Investment Balance as of end of period	$ 80,743	$ 80,743	$ 84,412
LXP Amount Funded as of end of period	$ 80,342	$ 80,342
Reems & Olive | Phoenix, AZ
Real Estate [Line Items]
Project (% owned)		95.50%
Approximate Acres (unaudited) | a	320	320
GAAP Investment Balance as of end of period	$ 73,683	$ 73,683
LXP Amount Funded as of end of period	74,308	$ 74,308
Proceeds from sale of real estate	$ 6,172
Mt. Comfort Phase II | Indianapolis, IN
Real Estate [Line Items]
Project (% owned)		80.00%
Approximate Acres (unaudited) | a	116	116
GAAP Investment Balance as of end of period	$ 5,328	$ 5,328
LXP Amount Funded as of end of period	$ 4,283	$ 4,283
Fairburn JV | Atlanta, GA
Real Estate [Line Items]
Project (% owned)		100.00%
Approximate Acres (unaudited) | a	14	14
GAAP Investment Balance as of end of period	$ 1,732	$ 1,732
LXP Amount Funded as of end of period	$ 1,751	$ 1,751