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Grants and other liabilities (Tables)
 3 Months Ended
Mar. 31, 2022
Grants and other liabilities [Abstract]  
Grants and other non-current liabilities
   
Balance as of
March 31,
    
Balance as of
December 31,
  
   
2022		    
2021
  
   
($ in thousands)
  
Grants
    
955,827
      
970,557
  
Other Liabilities
    
295,751
      
293,187
  
Grants and other non-current liabilities
    
1,251,578
      
1,263,744