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Share-Based Employee Compensation Additional Information (Details) - USD ($)
$ in Millions
3 Months Ended 12 Months Ended
Feb. 28, 2019
Feb. 28, 2018
Nov. 30, 2018
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Available for Grant 1,900,000    
Share-based Compensation $ 0.3 $ 0.5  
Employee Service Share-based Compensation, Nonvested Awards, Compensation Cost Not yet Recognized $ 3.0    
Employee Stock Ownership Plan (ESOP), Shares in ESOP 36,000    
Employee Stock Option [Member]      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Share-based Compensation Arrangement By Share-based Payment Award, Options Outstanding, Contractual Term 10 years    
Performance Shares [Member] | Minimum [Member]      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Rights, Percentage 0.00%    
Performance Shares [Member] | Maximum [Member]      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Rights, Percentage 200.00%    
CEO Performance Shares [Member] | Minimum [Member]      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Rights, Percentage 0.00%   0.00%
CEO Performance Shares [Member] | Maximum [Member]      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Rights, Percentage 143.00%   160.00%
Employee Stock [Member]      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Share-based Compensation Arrangement by Share-based Payment Award, Discount from Market Price, Offering Date 85.00%