Annual report pursuant to Section 13 and 15(d)

Fair Value - Additional Information (Details)

v3.20.4
Fair Value - Additional Information (Details) - USD ($)
$ in Thousands
3 Months Ended 12 Months Ended
Dec. 21, 2018
Dec. 31, 2018
Dec. 31, 2018
Dec. 31, 2020
Zenith Terminal Joliet Holdings        
Schedule of Equity Method Investments [Line Items]        
Equity interest percentage 0.60%      
Proceeds from sale of equity method investment $ 446      
Joliet Terminal        
Schedule of Equity Method Investments [Line Items]        
Realized gain (loss) on sale of equity method investment $ (715)      
Lightfoot Capital Partners LP        
Schedule of Equity Method Investments [Line Items]        
Equity interest percentage       6.60%
Lightfoot GP        
Schedule of Equity Method Investments [Line Items]        
Equity interest percentage       1.50%
Lightfoot GP | Gulf LNG        
Schedule of Equity Method Investments [Line Items]        
Proceeds from sale of interest   $ 667    
Realized gain (loss) on sale of equity method investment     $ (1,100)