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FAIR VALUE MEASUREMENTS (Details) - USD ($)
Sep. 30, 2023
Dec. 31, 2022
FAIR VALUE MEASUREMENTS    
Line of credit $ 0 $ 0
Liabilities    
Carrying Amount 409,253,129 410,966,199
Carrying Amount    
Assets    
Cash equivalents 16,141,398 49,560,723
Treasury bills 83,252,673 88,332,133
Assets , Fair value 99,394,071 137,892,856
Liabilities    
Carrying Amount 575,253,819 577,057,165
Estimated Fair Value    
Assets    
Cash equivalents 16,141,398 49,560,723
Treasury bills 83,991,888 88,908,540
Assets , Fair value 100,133,286 138,469,263
Liabilities    
Estimated Fair Value 492,640,130 509,339,582
Wholly owned properties | Carrying Amount    
Liabilities    
Carrying Amount 409,253,129 410,966,199
Wholly owned properties | Estimated Fair Value    
Liabilities    
Estimated Fair Value 341,700,294 355,629,060
Partially owned properties | Carrying Amount    
Liabilities    
Carrying Amount 166,000,690 166,090,966
Partially owned properties | Estimated Fair Value    
Liabilities    
Estimated Fair Value $ 150,939,836 $ 153,710,522