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Derivative financial Instruments (Details 4) - Cash flow hedges - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2020
Dec. 31, 2019
Disclosure of detailed information about hedging instruments [line items]    
Total $ 352,861 $ 218,416
Due within 1 year    
Disclosure of detailed information about hedging instruments [line items]    
Total 111,353 158,416
From 1 to 2 years    
Disclosure of detailed information about hedging instruments [line items]    
Total   40,000
From 2 years to 5 years    
Disclosure of detailed information about hedging instruments [line items]    
Total 217,854 20,000
More than 5 years    
Disclosure of detailed information about hedging instruments [line items]    
Total 23,654  
Foreign exchange risk    
Disclosure of detailed information about hedging instruments [line items]    
Total 71,353 72,391
Foreign exchange risk | Due within 1 year    
Disclosure of detailed information about hedging instruments [line items]    
Total 71,353 72,391
Foreign exchange risk | From 1 to 2 years    
Disclosure of detailed information about hedging instruments [line items]    
Total   0
Foreign exchange risk | From 2 years to 5 years    
Disclosure of detailed information about hedging instruments [line items]    
Total 0 0
Foreign exchange risk | More than 5 years    
Disclosure of detailed information about hedging instruments [line items]    
Total 0  
Interest rate and foreign exchange risk    
Disclosure of detailed information about hedging instruments [line items]    
Total 221,508 23,025
Interest rate and foreign exchange risk | Due within 1 year    
Disclosure of detailed information about hedging instruments [line items]    
Total 0 23,025
Interest rate and foreign exchange risk | From 1 to 2 years    
Disclosure of detailed information about hedging instruments [line items]    
Total   0
Interest rate and foreign exchange risk | From 2 years to 5 years    
Disclosure of detailed information about hedging instruments [line items]    
Total 197,854 0
Interest rate and foreign exchange risk | More than 5 years    
Disclosure of detailed information about hedging instruments [line items]    
Total 23,654  
Interest rate swaps    
Disclosure of detailed information about hedging instruments [line items]    
Total 60,000 123,000
Interest rate swaps | Due within 1 year    
Disclosure of detailed information about hedging instruments [line items]    
Total 40,000 63,000
Interest rate swaps | From 1 to 2 years    
Disclosure of detailed information about hedging instruments [line items]    
Total   40,000
Interest rate swaps | From 2 years to 5 years    
Disclosure of detailed information about hedging instruments [line items]    
Total 20,000 $ 20,000
Interest rate swaps | More than 5 years    
Disclosure of detailed information about hedging instruments [line items]    
Total $ 0