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Goodwill and intangible assets - Summary of Intangible Assets (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2023
Dec. 31, 2022
Definite-lived intangible assets    
Accumulated Amortization $ (16,513) $ (69,245)
Net Carrying Amount 50,668  
Indefinite-lived intangible assets    
Total intangible assets, Gross Carrying Amount 68,663 157,464
Total Intangible Assets, Currency Translation Adjustment (335) (2,322)
Total Intangible Assets, Net Carrying Amount 51,815 85,897
Easements    
Indefinite-lived intangible assets    
Gross Carrying Amount 1,191 1,191
Currency Translation Adjustment (44) (83)
Net Carrying Amount 1,147 1,108
Favorable vessel charter contracts    
Definite-lived intangible assets    
Gross Carrying Amount 17,700 106,500
Accumulated Amortization (10,615) (64,836)
Currency Translation Adjustment 0 0
Net Carrying Amount $ 7,085 $ 41,664
Weighted Average Life 4 years 3 years
Permits and development rights    
Definite-lived intangible assets    
Gross Carrying Amount $ 48,217 $ 48,217
Accumulated Amortization (5,557) (4,115)
Currency Translation Adjustment (291) (2,239)
Net Carrying Amount $ 42,369 $ 41,863
Weighted Average Life 38 years 38 years
Easements    
Definite-lived intangible assets    
Gross Carrying Amount $ 1,555 $ 1,556
Accumulated Amortization (341) (294)
Currency Translation Adjustment 0 0
Net Carrying Amount $ 1,214 $ 1,262
Weighted Average Life 30 years 30 years