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Financial Statement Information Investments in Unconsolidated Subsidiaries (Details)
$ in Thousands
3 Months Ended 6 Months Ended
Dec. 01, 2016
USD ($)
Jun. 30, 2020
USD ($)
Jun. 30, 2019
USD ($)
Mar. 31, 2019
USD ($)
Dec. 31, 2018
USD ($)
Jun. 30, 2020
USD ($)
Jun. 30, 2019
USD ($)
Jun. 30, 2020
SEK (kr)
Dec. 31, 2019
USD ($)
Mar. 31, 2019
SEK (kr)
Schedule of Equity Method Investments [Line Items]                    
Equity method investments   $ 136,673       $ 136,673     $ 139,243  
Equity in (losses) earnings of unconsolidated subsidiaries   2,649 $ (1,572)     2,133 $ 37,977      
Impairment of equity method investments           0 39,551      
Share Price of the Equity Method Investment | kr               kr 66   kr 65
Derivative Asset, Noncurrent   0       0     3,443  
Mekonomen [Member]                    
Schedule of Equity Method Investments [Line Items]                    
Equity method investments   111,000       111,000        
Equity Method Investment, Ownership Percentage 26.50%                  
Payments to Acquire Equity Method Investments $ 181,000       $ 48,000          
Equity Method Investment, Difference Between Carrying Amount and Underlying Equity   5,000       5,000        
Impairment of equity method investments       $ 40,000            
Equity Method Investments, Fair Value Disclosure   99,000       99,000        
Mekonomen [Member]                    
Schedule of Equity Method Investments [Line Items]                    
Equity Method Investment, Ownership Percentage         26.60%          
Europe [Member]                    
Schedule of Equity Method Investments [Line Items]                    
Equity method investments   121,374       121,374     121,619  
Equity in (losses) earnings of unconsolidated subsidiaries   1,000       1,000        
North America [Member]                    
Schedule of Equity Method Investments [Line Items]                    
Equity method investments   15,299       15,299     $ 17,624  
Equity in (losses) earnings of unconsolidated subsidiaries   $ (3,000) $ (1,000)     $ (3,000) $ (1,000)