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Capital and Reserves - Treasury Stock (Details) - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2024
Dec. 31, 2023
Dec. 31, 2022
Disclosure of share capital, reserves and other equity interest [Line Items]      
Beginning balance (in shares) 36,539,861 36,324,556 36,231,146
Beginning balance $ 110,174    
Ending balance (in shares) 36,790,820 36,539,861 36,324,556
Ending balance $ 105,601 $ 110,174  
Treasury stock      
Disclosure of share capital, reserves and other equity interest [Line Items]      
Beginning balance (in shares) 5,439,976 5,655,281 5,748,691
Beginning balance $ 110,174 $ 114,097 $ 115,799
Repurchase of common stock (in shares) (1)    
Repurchase of common stock $ 0    
Restricted stock issued - directors (in shares) (57,000) (63,000) (57,000)
Restricted stock issued - directors $ (1,038) $ (1,148) $ (1,039)
Restricted stock units - vested (in shares) (193,959) (152,305) (36,410)
Restricted stock units - vested $ (3,535) $ (2,775) $ (663)
Ending balance (in shares) 5,189,016 5,439,976 5,655,281
Ending balance $ 105,601 $ 110,174 $ 114,097
“Class A” | Treasury stock      
Disclosure of share capital, reserves and other equity interest [Line Items]      
Beginning balance (in shares) 318,140 318,140 318,140
Beginning balance $ 10,708 $ 10,708 $ 10,708
Repurchase of common stock (in shares) 0    
Repurchase of common stock $ 0    
Restricted stock issued - directors (in shares) 0 0 0
Restricted stock issued - directors $ 0 $ 0 $ 0
Restricted stock units - vested (in shares) 0 0 0
Restricted stock units - vested $ 0 $ 0 $ 0
Ending balance (in shares) 318,140 318,140 318,140
Ending balance $ 10,708 $ 10,708 $ 10,708
“Class B” | Treasury stock      
Disclosure of share capital, reserves and other equity interest [Line Items]      
Beginning balance (in shares) 689,367 689,367 689,367
Beginning balance $ 18,711 $ 18,711 $ 18,711
Repurchase of common stock (in shares) 0    
Repurchase of common stock $ 0    
Restricted stock issued - directors (in shares) 0 0 0
Restricted stock issued - directors $ 0 $ 0 $ 0
Restricted stock units - vested (in shares) 0 0 0
Restricted stock units - vested $ 0 $ 0 $ 0
Ending balance (in shares) 689,367 689,367 689,367
Ending balance $ 18,711 $ 18,711 $ 18,711
“Class E” | Treasury stock      
Disclosure of share capital, reserves and other equity interest [Line Items]      
Beginning balance (in shares) 4,432,469 4,647,774 4,741,184
Beginning balance $ 80,755 $ 84,678 $ 86,380
Repurchase of common stock (in shares) (1)    
Repurchase of common stock $ 0    
Restricted stock issued - directors (in shares) (57,000) (63,000) (57,000)
Restricted stock issued - directors $ (1,038) $ (1,148) $ (1,039)
Restricted stock units - vested (in shares) (193,959) (152,305) (36,410)
Restricted stock units - vested $ (3,535) $ (2,775) $ (663)
Ending balance (in shares) 4,181,509 4,432,469 4,647,774
Ending balance $ 76,182 $ 80,755 $ 84,678