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Merger and Issuance of Common Stock to Terra Offshore REIT - Narratives - Mergers (Details) - $ / shares	Mar. 01, 2020	Sep. 30, 2021	Dec. 31, 2020
Business Acquisition
Common Stock, Par Value		$ 0.01	$ 0.01
Terra Fund 7
Business Acquisition
Common Stock, Par Value	$ 0.01
Terra PropertyTrust
Business Acquisition
Common Stock, Par Value	0.01
Terra Property Trust 2 Inc
Business Acquisition
Common Stock, Par Value	0.01
Terra Property Trust 2 Inc | Common Stock
Business Acquisition
Business Acquisition Share Conversion Rate	$ 1.2031
Terra Fund 7
Business Acquisition
Business Combination Common Stock Shares	2,116,785.76

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