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Long-Term Debt - Narrative (Details) - USD ($)
1 Months Ended 12 Months Ended
Feb. 28, 2023
Aug. 26, 2022
Aug. 25, 2022
Jun. 28, 2022
Feb. 28, 2022
Jun. 30, 2022
Feb. 28, 2023
Feb. 28, 2022
Feb. 28, 2021
Long-term debt                  
Outstanding letters of credit $ 18,200,000           $ 18,200,000    
Maximum line of credit debt allowed under covenant 363,000,000           363,000,000    
Interest costs incurred             46,200,000    
Interest costs capitalized             5,500,000 $ 0 $ 0
Interest expense               12,800,000 $ 12,600,000
Credit agreement | Credit Agreement with Bank of America                  
Long-term debt                  
Fixed rate debt 936,900,000       $ 799,500,000   936,900,000 799,500,000  
Credit agreement | Credit Agreement with Bank of America | Debt Instrument, Covenant Period Two                  
Long-term debt                  
Maximum net leverage ratio       4.00          
Credit agreement | Credit Agreement with Bank of America | Debt Instrument, Covenant Period Three                  
Long-term debt                  
Maximum net leverage ratio       3.75          
Credit agreement | Credit Agreement with Bank of America | Debt Instrument, Covenant Period Four                  
Long-term debt                  
Maximum net leverage ratio       3.50          
Credit agreement | Revolving loan | Credit Agreement with Bank of America                  
Long-term debt                  
Unsecured total revolving commitment 1,250,000,000           1,250,000,000    
Maximum allowable increase due to accordion feature             300,000,000    
Proceeds from exercise of accordion feature       $ 250,000,000   $ 250,000,000      
Remaining borrowing capacity on line of credit 541,800,000           541,800,000    
Fixed rate debt $ 425,000,000       $ 125,000,000   $ 425,000,000 $ 125,000,000  
Credit agreement | SOFR | Credit Agreement with Bank of America                  
Long-term debt                  
Percent of term loans made due quarterly       0.625%          
Additional credit spread       0.10%          
Credit agreement | Minimum | Base rate | Credit Agreement with Bank of America | Variable Rate Component One                  
Long-term debt                  
Margin (as a percent)       0.00% 0.00%        
Credit agreement | Minimum | LIBOR | Credit Agreement with Bank of America | Variable Rate Component Two                  
Long-term debt                  
Margin (as a percent) 1.00%                
Credit agreement | Minimum | SOFR | Credit Agreement with Bank of America | Variable Rate Component Two                  
Long-term debt                  
Margin (as a percent)       1.00%          
Credit agreement | Maximum | Base rate | Credit Agreement with Bank of America | Variable Rate Component One                  
Long-term debt                  
Margin (as a percent) 1.00%     1.00%          
Credit agreement | Maximum | LIBOR | Credit Agreement with Bank of America | Variable Rate Component Two                  
Long-term debt                  
Margin (as a percent) 2.00%                
Credit agreement | Maximum | SOFR | Credit Agreement with Bank of America | Variable Rate Component Two                  
Long-term debt                  
Margin (as a percent)       2.00%          
Unsecured Debt | MBFC loan                  
Long-term debt                  
Repayment of MBFC loan $ 15,100,000                
Unsecured Debt | SOFR | MBFC loan                  
Long-term debt                  
Additional credit spread   0.10%              
Unsecured Debt | Minimum | Base rate | MBFC loan | Variable Rate Component One                  
Long-term debt                  
Margin (as a percent)   0.00%              
Unsecured Debt | Minimum | Base rate | MBFC loan | Variable Rate Component Two                  
Long-term debt                  
Margin (as a percent)     1.00%            
Unsecured Debt | Minimum | LIBOR | MBFC loan | Variable Rate Component One                  
Long-term debt                  
Margin (as a percent)     2.00%            
Unsecured Debt | Minimum | SOFR | MBFC loan | Variable Rate Component Two                  
Long-term debt                  
Margin (as a percent)   1.00%              
Unsecured Debt | Maximum | Base rate | MBFC loan | Variable Rate Component One                  
Long-term debt                  
Margin (as a percent)   1.00%              
Unsecured Debt | Maximum | SOFR | MBFC loan | Variable Rate Component Two                  
Long-term debt                  
Margin (as a percent)   2.00%