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General Information (Details)
Dec. 31, 2020
Number
Statement [Line Items]  
Number of employees 9,051
Senior Executives [Member]  
Statement [Line Items]  
Number of employees 14
Managers and Deputy Managers [Member]  
Statement [Line Items]  
Number of employees 451
Other workers [Member]  
Statement [Line Items]  
Number of employees 8,586
Parent [Member]  
Statement [Line Items]  
Number of employees 418
Parent [Member] | Senior Executives [Member]  
Statement [Line Items]  
Number of employees 10
Parent [Member] | Managers and Deputy Managers [Member]  
Statement [Line Items]  
Number of employees 90
Parent [Member] | Other workers [Member]  
Statement [Line Items]  
Number of employees 318