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Disclosures about fair value of financial instruments - Schedule of Assets and Liabilities Measured at Fair Value on a Recurring Basis (Details) - Recurring - USD ($)
$ in Thousands
Dec. 31, 2021
Dec. 31, 2020
Assets    
Cash equivalents $ 198,811 $ 106,856
Derivatives 121,031 122,603
Total Assets 319,842 229,459
Liabilities    
Derivatives 22,977 20,525
Total Liabilities 22,977 20,525
Quoted Prices in Active Markets For Identical Assets (Level 1)    
Assets    
Cash equivalents 198,811 106,856
Derivatives 0 0
Total Assets 198,811 106,856
Liabilities    
Derivatives 0 0
Total Liabilities 0 0
Significant Other Observable Inputs (Level 2)    
Assets    
Cash equivalents 0 0
Derivatives 121,031 122,603
Total Assets 121,031 122,603
Liabilities    
Derivatives 22,977 20,525
Total Liabilities 22,977 20,525
Significant Unobservable Inputs (Level 3)    
Assets    
Cash equivalents 0 0
Derivatives 0 0
Total Assets 0 0
Liabilities    
Derivatives 0 0
Total Liabilities $ 0 $ 0