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Long-Term Debt - Interest Rates (Details)
$ in Thousands
 12 Months Ended
Feb. 28, 2022
USD ($)
quarter
Feb. 28, 2021
USD ($)
Feb. 29, 2020
USD ($)
Credit agreement      
Revolving Line of Credit      
Average borrowings outstanding $ 503,900 $ 334,400 $ 286,640
Average interest rates during each year (as a percent) 1.10% 1.70% 3.20%
Weighted average interest rates on borrowings outstanding at year end (as a percent) 1.20% 1.10% 2.70%
Number of prior quarters used in calculation of average borrowings outstanding | quarter 4    
Credit agreement | Minimum      
Revolving Line of Credit      
Interest rate range during each year (as a percent) 1.10% 1.10% 2.60%
Credit agreement | Maximum      
Revolving Line of Credit      
Interest rate range during each year (as a percent) 3.30% 4.80% 5.50%
MBFC loan      
Revolving Line of Credit      
Average borrowings outstanding $ 17,087 $ 18,987 $ 20,887
Average interest rates during each year (as a percent) 1.10% 1.40% 3.10%
Weighted average interest rates on borrowings outstanding at year end (as a percent) 1.20% 1.10% 2.60%
MBFC loan | Minimum      
Revolving Line of Credit      
Interest rate range during each year (as a percent) 1.10% 1.10% 2.60%
MBFC loan | Maximum      
Revolving Line of Credit      
Interest rate range during each year (as a percent) 1.20% 2.60% 3.50%