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Long-term Debt - Schedule of Long-term Debt (Details) - USD ($) $ in Thousands	Dec. 31, 2019	Dec. 31, 2018
Debt Instrument [Line Items]
Less: unamortized deferred financing costs on senior unsecured notes	$ (22,900)
Long-term debt	2,711,573	$ 2,735,276
Senior unsecured notes
Debt Instrument [Line Items]
Total principal of senior unsecured notes	1,982,568	2,039,409
Less: unamortized deferred financing costs on senior unsecured notes	(15,618)	(20,865)
Senior unsecured notes | 6.50% senior unsecured notes due November 1, 2021
Debt Instrument [Line Items]
Total principal of senior unsecured notes	$ 71,835	71,835
Debt stated interest rate (percent)	6.50%
Senior unsecured notes | 6.875% senior unsecured notes due March 15, 2022
Debt Instrument [Line Items]
Total principal of senior unsecured notes	$ 890,980	901,480
Debt stated interest rate (percent)	6.875%
Senior unsecured notes | 6.875% senior unsecured notes due January 15, 2023
Debt Instrument [Line Items]
Total principal of senior unsecured notes	$ 351,953	366,094
Debt stated interest rate (percent)	6.875%
Senior unsecured notes | 6.25% senior unsecured notes due May 1, 2026
Debt Instrument [Line Items]
Total principal of senior unsecured notes	$ 400,000	400,000
Debt stated interest rate (percent)	6.25%
Senior unsecured notes | 2.625% senior unsecured convertible notes due September 15, 2023
Debt Instrument [Line Items]
Total principal of senior unsecured notes	$ 267,800	300,000
Less: unamortized debt discount on senior unsecured convertible notes	(50,877)	(69,268)
Long-term debt	$ 267,800
Debt stated interest rate (percent)	2.625%
Revolving credit facility | Credit Facility | Oasis Credit Facility
Debt Instrument [Line Items]
Total principal of senior unsecured notes	$ 337,000	468,000
Revolving credit facility | Credit Facility | OMP Credit Facility
Debt Instrument [Line Items]
Total principal of senior unsecured notes	$ 458,500	$ 318,000

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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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Contractual interest rate for funds borrowed, under the debt agreement.

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