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Supplemental Financial Statement Information - Cash flow, etc. (Details) - USD ($)
$ in Thousands
3 Months Ended 6 Months Ended
May 31, 2020
May 31, 2019
May 31, 2020
May 31, 2019
Supplemental Cash Flow Information        
Treasury shares   22,390   22,390
Treasury stock   $ 846   $ 846
Increase (decrease) in accounts payable and accrued liabilities related to additions to real estate assets     $ (744) 2,777
Deferred Compensation Plan        
Decrease in deferred compensation liability     1,900  
Interest paid        
Interest payments $ 1,756 $ 1,600 $ 3,433 $ 3,219
Income tax rate        
Income tax benefit rate (as a percent)     21.10% 22.30%