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Segment Information (Textual) (Details)
$ in Thousands
3 Months Ended 12 Months Ended
Dec. 31, 2019
USD ($)
Sep. 30, 2019
USD ($)
Jun. 30, 2019
USD ($)
Mar. 31, 2019
USD ($)
Dec. 31, 2018
USD ($)
Sep. 30, 2018
USD ($)
Jun. 30, 2018
USD ($)
Mar. 31, 2018
USD ($)
Dec. 31, 2019
USD ($)
segment
Dec. 31, 2018
USD ($)
Dec. 31, 2017
USD ($)
Jan. 01, 2019
Segment Reporting Information [Line Items]                        
Number of reportable segments (business segments) | segment                 4      
Number of consolidated segments | segment                 2      
Number of segments accounted for as equity method investments | segment                 3      
Sales and merchandising revenues $ 1,885,603 $ 1,982,755 $ 2,325,041 $ 1,976,792 $ 812,662 $ 685,579 $ 911,402 $ 635,739 $ 8,170,191 $ 3,045,382 $ 3,686,345  
Property, plant and equipment, net 938,418       476,711       938,418 476,711    
Rail Group assets leased to others, net 584,298       521,785       584,298 521,785    
Other                        
Segment Reporting Information [Line Items]                        
Sales and merchandising revenues                 0 0 47,871  
Canada | Trade                        
Segment Reporting Information [Line Items]                        
Sales and merchandising revenues                 666,289 136,439 $ 148,974  
Property, plant and equipment, net 41,200               41,200      
Canada | Railcar | Rail                        
Segment Reporting Information [Line Items]                        
Rail Group assets leased to others, net $ 22,700       $ 23,200       $ 22,700 $ 23,200    
Customer Concentration Risk | Revenues                        
Segment Reporting Information [Line Items]                        
Concentration risk percentage                 10.00%      
LTG                        
Segment Reporting Information [Line Items]                        
Percentage of ownership in acquiree                       67.50%