Debt - Ultra Resources, Inc. - Unsecured Notes - Additional Information (Details) - USD ($) $ in Thousands	3 Months Ended
Mar. 31, 2020	Dec. 31, 2019
Debt Instrument [Line Items]
Aggregate principal amounts outstanding	$ 1,928,528	$ 1,992,748
Ultra Resources, Inc. \| 6.875% Senior, Unsecured Notes Due 2022
Debt Instrument [Line Items]
Aggregate principal amounts outstanding	$ 150,400
Interest payment terms	Prior to default, the 2022 Notes were scheduled to mature on April 15, 2022. Interest on the 2022 Notes accrued at an annual rate of 6.875% and interest payment dates for the 2022 Notes were April 15 and October 15 of each year.
Stated interest rate	6.875%
Ultra Resources, Inc. \| 7.125% Senior, Unsecured Notes Due 2025
Debt Instrument [Line Items]
Aggregate principal amounts outstanding	$ 225,000
Interest payment terms	The 2025 Notes were scheduled to mature on April 15, 2025. Interest on the 2025 Notes accrued at an annual rate of 7.125% and interest payment dates for the 2025 Notes are April 15 and October 15 of each year. Interest was to be paid on the Unsecured Notes from the issue date until maturity.
Stated interest rate	7.125%

Amount, before unamortized (discount) premium and debt issuance costs, of long-term debt. Includes, but is not limited to, notes payable, bonds payable, commercial loans, mortgage loans, convertible debt, subordinated debt and other types of debt.

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