Quarterly report pursuant to Section 13 or 15(d)

Additional Cash Flow Information - Supplemental Disclosure of Cash Flow Information (Details)

v3.19.3
Additional Cash Flow Information - Supplemental Disclosure of Cash Flow Information (Details) - USD ($)
$ in Thousands
 9 Months Ended
Sep. 30, 2019
Sep. 30, 2018
Dec. 31, 2018
Dec. 31, 2017
Supplemental Cash Flow Information [Abstract]        
Non-cash accruals of property, plant and equipment and other non-current assets $ 7,875 $ 3,529    
Accrued term loan issuance costs 0 441    
2019 Term Loan paid-in-kind election 996 0    
Future proceeds from sale of Magellan Petroleum UK 4,940 0    
Tradable equity securities 3,705 0    
Non-cash settlement of withholding taxes associated with the 2018 and 2017 bonus paid and vesting of certain awards, respectively 6,686 5,733    
Non-cash settlement of the 2018 and 2017 bonus paid, respectively 18,396 15,202    
Non-cash movement for funds deposited in escrow 400      
Cash and cash equivalents 91,057 172,317 $ 133,714  
Non-current restricted cash 4,300 57,440 49,875  
Total cash, cash equivalents and restricted cash shown in the statements of cash flows $ 95,357 $ 229,757 $ 183,589 $ 128,273