Earnings Per Share - Schedule of Computations of Basic and Diluted Net (Loss) Income per Share (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended
	Mar. 31, 2026	Mar. 31, 2025
Numerator:
Net (loss) income attributable to JPMREIT stockholders, basic	$ (2,778)	$ 1,681
Net (loss) income attributable to JPMREIT stockholders, diluted	$ (2,778)	$ 1,681
Denominator:
Weighted-average shares of common stock outstanding, basic	82,216	50,719
Weighted-average shares of common stock outstanding, diluted	82,216	50,724
Net (loss) income per share of common stock - basic	$ (0.03)	$ 0.03
Net (loss) income per share of common stock - diluted	$ (0.03)	$ 0.03