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Other Events (Details)
$ / shares in Units, $ in Thousands, $ in Millions
1 Months Ended 3 Months Ended
Dec. 03, 2021
USD ($)
$ / shares
Jun. 16, 2021
USD ($)
Jun. 16, 2021
MXN ($)
Apr. 30, 2019
MXN ($)
Jul. 31, 2018
MXN ($)
Jan. 31, 2022
USD ($)
Jan. 31, 2021
USD ($)
Jan. 31, 2022
MXN ($)
Jul. 31, 2021
USD ($)
Jun. 25, 2021
USD ($)
Dividend declared per share | $ / shares $ 1.15                  
Dividend amount paid to shareholders $ 20,300         $ 20,330 $ 20,343      
Expenses related to Mexican tax matters           367        
Mexican Tax Authority | Tax Assessment 2011                    
Tax assessment       $ 2,200.0            
Discreet tax expense (benefit)   $ 2,400 $ 47.8              
Mexican Tax Authority | Tax Assessment 2011 | Income Taxes [Member]                    
Discreet tax expense (benefit)   1,500                
Mexican Tax Authority | Tax Assessment 2011 | Value Added Taxes [Member]                    
Discreet tax expense (benefit)   $ 900                
Mexican Tax Authority | Tax Assessment 2013                    
Amount disputed         $ 2,600.0 126,600        
Estimate of loss           148,600   $ 3,080.0    
Fixed assets net book value under lien                   $ 26,000
Bank accounts under lien                   $ 1,000
Tax dispute liability accrued                 $ 11,000  
Expenses related to Mexican tax matters           400        
Mexican Tax Authority | Tax Assessment 2013 | Employee Profit Sharing Liability                    
Estimate of loss           $ 5,700   $ 118.0