v3.21.1
Derivative financial instruments (Details) - USD ($)
$ in Thousands
3 Months Ended
Mar. 31, 2021
Mar. 31, 2020
Dec. 31, 2020
Breakdown of fair value amount of derivative financial instruments [Abstract]      
Loss on cash flow hedges $ 14,038 $ 14,529  
Cash Flow Hedge [Member]      
Breakdown of fair value amount of derivative financial instruments [Abstract]      
Assets 3,328   $ 1,559
Liabilities $ 287,861   328,184
Interest Rate Derivatives [Member] | Euros [Member]      
Breakdown of fair value amount of derivative financial instruments [Abstract]      
Percent of notional amount of debt hedged in next 12 months 100.00%    
Percentage of notional amount of debt hedged in year two 75.00%    
Interest Rate Derivatives [Member] | Cash Flow Hedge [Member]      
Breakdown of fair value amount of derivative financial instruments [Abstract]      
Assets $ 1,795   898
Liabilities 263,271   302,302
Loss on cash flow hedges (14,000) $ (14,500)  
After-tax result accumulated in equity 126,100   96,600
Foreign Exchange Derivative Instruments [Member] | Cash Flow Hedge [Member]      
Breakdown of fair value amount of derivative financial instruments [Abstract]      
Assets 1,533   661
Liabilities 0   0
Notes Conversion Option [Member] | Cash Flow Hedge [Member]      
Breakdown of fair value amount of derivative financial instruments [Abstract]      
Assets 0   0
Liabilities $ 24,590   $ 25,882