Annual report pursuant to Section 13 and 15(d)

Fair Value - Additional Information (Details)

v3.19.3.a.u2
Fair Value - Additional Information (Details) - USD ($)
$ in Thousands
 3 Months Ended 12 Months Ended
Dec. 21, 2017
Dec. 31, 2018
Dec. 31, 2018
Dec. 31, 2019
Schedule of Equity Method Investments [Line Items]        
Proceeds from sale of interest $ 7,600      
Lightfoot Capital Partners LP        
Schedule of Equity Method Investments [Line Items]        
Equity interest percentage   6.60% 6.60% 6.60%
Lightfoot GP        
Schedule of Equity Method Investments [Line Items]        
Equity interest percentage   1.50% 1.50% 1.50%
Arc Terminal Joliet Holdings        
Schedule of Equity Method Investments [Line Items]        
Required reinvestment $ 1,200      
Gulf LNG | Lightfoot GP        
Schedule of Equity Method Investments [Line Items]        
Proceeds from sale of interest   $ 667    
Realized loss on sale of investment     $ (1,100)