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FAIR VALUE MEASUREMENTS (Details) - USD ($)
Mar. 31, 2023
Dec. 31, 2022
FAIR VALUE MEASUREMENTS    
Line of credit $ 0 $ 0
Liabilities    
Carrying Amount 410,449,284 410,966,199
Carrying Amount    
Assets    
Cash equivalents 24,654,625 49,560,723
Treasury bills 97,759,876 88,332,133
Assets , Fair value 122,414,501 137,892,856
Liabilities    
Carrying Amount 576,510,712 577,057,165
Estimated Fair Value    
Assets    
Cash equivalents 24,654,625 49,560,723
Treasury bills 98,616,960 88,908,540
Assets , Fair value 123,271,585 138,469,263
Liabilities    
Estimated Fair Value 528,162,409 509,339,582
Wholly owned properties | Carrying Amount    
Liabilities    
Carrying Amount 410,449,284 410,966,199
Wholly owned properties | Estimated Fair Value    
Liabilities    
Estimated Fair Value 369,932,494 355,629,060
Partially owned properties | Carrying Amount    
Liabilities    
Carrying Amount 166,061,428 166,090,966
Partially owned properties | Estimated Fair Value    
Liabilities    
Estimated Fair Value $ 158,229,915 $ 153,710,522