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Note 10 - Notes and Mortgage Payable (Details Textual) - USD ($)
$ in Thousands
9 Months Ended
Feb. 28, 2023
Sep. 30, 2023
Oct. 31, 2023
Feb. 29, 2020
Unsecured Debt [Member] | Senior Unsecured Notes Guaranteed by Parent Company [Member]        
Debt Instrument, Face Amount     $ 500,000  
Debt Instrument, Interest Rate, Stated Percentage     6.40%  
Nonrecourse Mortages Assumed Through Consolidation [Member]        
Noncash or Part Noncash Acquisition, Debt Assumed   $ 37,200    
Number of Real Estate Properties   2    
Mortgage Relating to An Operating Property [Member]        
Repayments of Long-Term Debt   $ 12,000    
Revolving Credit Facility [Member]        
Line of Credit Facility, Current Borrowing Capacity $ 2,000,000     $ 2,000,000
Line of Credit Facility, Maximum Borrowing Capacity $ 2,750,000      
Debt Instrument, Basis Spread on Variable Rate 0.775%      
Debt Instrument, Interest Rate, Increase (Decrease)   (0.02%)    
Debt Instrument, Interest Rate, Effective Percentage   6.17%    
Long-Term Line of Credit   $ 0    
Revolving Credit Facility [Member] | Maximum [Member]        
Debt Instrument, Interest Rate, Increase (Decrease) 0.04%      
Line of Credit [Member]        
Long-Term Line of Credit   $ 0