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Long Term Debt - Ultra Resources, Inc. - Second Lien Notes - Additional Information (Details) - USD ($)
$ in Thousands
3 Months Ended 6 Months Ended
Dec. 21, 2018
Mar. 31, 2019
Jun. 30, 2019
Dec. 31, 2018
Debt Instrument [Line Items]        
Principal repayment obligation     $ 1,985,758 $ 2,044,035
Ultra Resources, Inc.        
Debt Instrument [Line Items]        
Repurchase price percentage     101.00%  
Second Lien Notes, Secured, Due 2024 | Ultra Resources, Inc. | Exchange Agreement        
Debt Instrument [Line Items]        
Principal repayment obligation     $ 578,100  
Debt issued on exchange, interest rate 9.00%      
Debt issued on exchange, paid in kind interest rate percentage 2.00%      
Interest payment terms   The interest payment dates for the Second Lien Notes are January 15 and July 15 of each year, commencing on July 15, 2019.    
Maturity date Jul. 12, 2024