Condensed Consolidating Financial Information - Summary of Condensed Consolidating Results Of Operations (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019
Revenues:
Total revenue	$ 88,874	$ 286,810	$ 276,638	$ 465,523
Operating expenses:
Depreciation, depletion and amortization	88,443	95,806	181,986	160,393
Write-down of oil and natural gas properties		12,361	57	12,361
Accretion expense	13,794	9,945	26,211	19,552
General and administrative expense	17,192	18,865	44,661	36,474
Total operating expenses	183,477	191,938	375,453	352,282
Operating income (expense)	(94,603)	94,872	(98,815)	113,241
Interest expense	(26,190)	(24,932)	(52,040)	(50,150)
Price risk management activities income (expense)	(68,682)	29,990	174,535	(79,589)
Other income (expense)	(528)	831	(674)	1,264
Income tax benefit (expense)	49,392	(5,997)	(5,868)	362
Net income (loss)	(140,611)	94,764	17,138	(14,872)
Oil and Gas Properties
Operating expenses:
Lease operating expense	63,882	54,455	122,123	122,414
Production taxes	166	506	415	1,088
Parent
Operating expenses:
General and administrative expense	472	48	694	385
Total operating expenses	472	48	694	385
Operating income (expense)	(472)	(48)	(694)	(385)
Interest expense			7
Income tax benefit (expense)	49,707	(6,187)	(5,552)	650
Equity earnings (losses) from subsidiaries	(189,846)	100,999	23,377	(15,137)
Net income (loss)	(140,611)	94,764	17,138	(14,872)
Subsidiary Issuer
Operating expenses:
Depreciation, depletion and amortization	795	1,242	1,522	1,314
General and administrative expense	7,053	7,626	23,794	16,232
Total operating expenses	7,848	8,868	25,316	17,546
Operating income (expense)	(7,848)	(8,868)	(25,316)	(17,546)
Interest expense	(20,861)	(17,020)	(39,483)	(33,592)
Price risk management activities income (expense)	(68,682)	29,990	174,535	(79,589)
Other income (expense)	1,660	106	1,826	187
Income tax benefit (expense)	(1)		(1)
Equity earnings (losses) from subsidiaries	(94,114)	96,791	(88,184)	115,403
Net income (loss)	(189,846)	100,999	23,377	(15,137)
Guarantors
Revenues:
Total revenue	88,874	286,810	276,631	465,523
Operating expenses:
Depreciation, depletion and amortization	87,634	94,554	180,437	159,064
Accretion expense	13,794	9,945	26,211	19,552
General and administrative expense	9,041	10,634	18,869	19,409
Total operating expenses	174,820	170,094	348,358	321,527
Operating income (expense)	(85,946)	116,716	(71,727)	143,996
Interest expense	(5,329)	(7,719)	(12,562)	(16,237)
Other income (expense)	185	765	369	1,236
Income tax benefit (expense)	(156)	(294)	(157)	(296)
Net income (loss)	(91,246)	109,468	(84,077)	128,699
Guarantors | Oil and Gas Properties
Operating expenses:
Lease operating expense	64,185	54,455	122,426	122,414
Production taxes	166	506	415	1,088
Non-Guarantors
Revenues:
Total revenue			7
Operating expenses:
Depreciation, depletion and amortization	14	10	27	15
Write-down of oil and natural gas properties		12,361	57	12,361
General and administrative expense	626	557	1,304	448
Total operating expenses	337	12,928	1,085	12,824
Operating income (expense)	(337)	(12,928)	(1,078)	(12,824)
Interest expense		(193)	(2)	(321)
Other income (expense)	(2,373)	(40)	(2,869)	(159)
Income tax benefit (expense)	(158)	484	(158)	8
Net income (loss)	(2,868)	(12,677)	(4,107)	(13,296)
Non-Guarantors | Oil and Gas Properties
Operating expenses:
Lease operating expense	(303)		(303)
Elimination
Operating expenses:
Equity earnings (losses) from subsidiaries	283,960	(197,790)	64,807	(100,266)
Net income (loss)	283,960	(197,790)	64,807	(100,266)
Oil Revenue
Revenues:
Revenue	74,471	256,908	241,095	412,587
Oil Revenue | Guarantors
Revenues:
Revenue	74,471	256,908	241,088	412,587
Oil Revenue | Non-Guarantors
Revenues:
Revenue			7
Natural Gas Revenue
Revenues:
Revenue	11,140	14,746	23,038	29,193
Natural Gas Revenue | Guarantors
Revenues:
Revenue	11,140	14,746	23,038	29,193
NGL Revenue
Revenues:
Revenue	1,964	6,645	6,265	11,711
NGL Revenue | Guarantors
Revenues:
Revenue	1,964	6,645	6,265	11,711
Other
Revenues:
Revenue	1,299	8,511	6,240	12,032
Other | Guarantors
Revenues:
Revenue	$ 1,299	$ 8,511	$ 6,240	$ 12,032