Industry Segment Information (Industry Segment Information) (Details) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2021 USD ($)	Jun. 30, 2020 USD ($)	Jun. 30, 2021 USD ($) segment	Jun. 30, 2020 USD ($)
Segment Reporting Information [Line Items]
Number of reporting segments | segment			3
Revenues:
Revenues	$ 134,057	$ 89,007	$ 254,954	$ 211,383
Operating costs:
Operating costs	74,623	115,103	145,306	198,826
Depreciation, depletion, and amortization	16,364	35,960	33,875	97,577
Impairments	0	109,318	0	851,242
Total expenses	90,987	260,381	179,181	1,147,645
Loss on abandonment of assets	0	0	0	17,554
General and administrative	5,751	25,814	12,920	37,367
(Gain) loss on disposition of assets	(1,710)	877	(2,182)	1,267
Income (loss) from operations	39,029	(198,065)	65,035	(992,450)
Gain (loss) on derivatives	(42,400)	(6,937)	(65,231)	(6,454)
Write-off of debt issuance costs	0	(2,426)	0	(2,426)
Loss on change in fair value of warrants	3,574	0	3,574	0
Reorganization Items	(1,852)	(7,027)	(2,988)	(7,027)
Interest, net	(487)	(7,608)	(3,193)	(20,865)
Other	(831)	43	(755)	103
Loss before income taxes	(10,115)	(222,020)	(10,706)	(1,029,119)
Intersegment Eliminations
Revenues:
Revenues	(10,103)	(4,871)	(19,514)	(10,331)
Operating costs:
Operating costs	(10,983)	(4,871)	(21,274)	(10,331)
Depreciation, depletion, and amortization	0	0	0	0
Impairments		0		0
Total expenses	(10,983)	(4,871)	(21,274)	(10,331)
Loss on abandonment of assets				0
General and administrative	880	0	1,760	0
(Gain) loss on disposition of assets	0	0	0	0
Income (loss) from operations	0	0	0	0
Gain (loss) on derivatives	0	0	0	0
Write-off of debt issuance costs		0		0
Loss on change in fair value of warrants	0		0
Reorganization Items	0	0	0	0
Interest, net	0	0	0	0
Other	0	0	0	0
Loss before income taxes	0	0	0	0
Oil and Natural Gas [Member] | Operating Segments [Member]
Revenues:
Revenues	59,776	26,957	114,801	75,481
Operating costs:
Operating costs	16,350	72,354	36,343	103,769
Depreciation, depletion, and amortization	6,476	22,059	14,131	58,787
Impairments		109,318		377,154
Total expenses	22,826	203,731	50,474	539,710
Loss on abandonment of assets				17,554
General and administrative	0	0	0	0
(Gain) loss on disposition of assets	(67)	(45)	(87)	(58)
Income (loss) from operations	37,017	(176,729)	64,414	(481,725)
Gain (loss) on derivatives	0	0	0	0
Write-off of debt issuance costs		0		0
Loss on change in fair value of warrants	0		0
Reorganization Items	0	0	0	0
Interest, net	0	0	0	0
Other	34	9	90	30
Loss before income taxes	37,051	(176,720)	64,504	(481,695)
Contract drilling [Member]
Operating costs:
(Gain) loss on disposition of assets			(2,100)	(100)
Contract drilling [Member] | Operating Segments [Member]
Revenues:
Revenues	18,061	29,202	33,735	65,834
Operating costs:
Operating costs	14,080	20,951	25,951	46,400
Depreciation, depletion, and amortization	1,570	2,946	3,145	14,691
Impairments		0		410,126
Total expenses	15,650	23,897	29,096	471,217
Loss on abandonment of assets				0
General and administrative	0	0	0	0
(Gain) loss on disposition of assets	(1,618)	(548)	(2,146)	(139)
Income (loss) from operations	4,029	5,853	6,785	(405,244)
Gain (loss) on derivatives	0	0	0	0
Write-off of debt issuance costs		0		0
Loss on change in fair value of warrants	0		0
Reorganization Items	0	0	0	0
Interest, net	0	0	0	0
Other	11	6	16	23
Loss before income taxes	4,040	5,859	6,801	(405,221)
Mid-Stream [Member] | Operating Segments [Member]
Revenues:
Revenues	66,323	37,719	125,932	80,399
Operating costs:
Operating costs	55,176	26,669	104,286	58,988
Depreciation, depletion, and amortization	8,064	10,348	16,096	22,621
Impairments		0		63,962
Total expenses	63,240	37,017	120,382	145,571
Loss on abandonment of assets				0
General and administrative	0	0	0	0
(Gain) loss on disposition of assets	0	(9)	75	(15)
Income (loss) from operations	3,083	711	5,475	(65,157)
Gain (loss) on derivatives	0	0	0	0
Write-off of debt issuance costs		0		0
Loss on change in fair value of warrants	0		0
Reorganization Items	0	0	0
Interest, net	641	(542)	(416)	(1,060)
Other	(850)	22	(839)	39
Loss before income taxes	2,874	191	4,220	(66,178)
Corporate and Other | Corporate, Non-Segment
Revenues:
Revenues	0	0	0	0
Operating costs:
Operating costs	0	0	0	0
Depreciation, depletion, and amortization	254	607	503	1,478
Impairments		0		0
Total expenses	254	607	503	1,478
Loss on abandonment of assets				0
General and administrative	4,871	25,814	11,160	37,367
(Gain) loss on disposition of assets	(25)	1,479	(24)	1,479
Income (loss) from operations	(5,100)	(27,900)	(11,639)	(40,324)
Gain (loss) on derivatives	(42,400)	(6,937)	(65,231)	(6,454)
Write-off of debt issuance costs		(2,426)		(2,426)
Loss on change in fair value of warrants	3,574		3,574
Reorganization Items	(1,852)	(7,027)	(2,988)	(7,027)
Interest, net	(1,128)	(7,066)	(2,777)	(19,805)
Other	(26)	6	(22)	11
Loss before income taxes	(54,080)	(51,350)	(86,231)	(76,025)
Oil and natural gas
Revenues:
Revenues	41,970	26,956	96,994	75,478
Operating costs:
Operating costs	15,487	71,540	34,636	102,203
Oil and natural gas | Intersegment Eliminations
Revenues:
Revenues	(17,806)	(1)	(17,807)	(3)
Operating costs:
Operating costs	(863)	(814)	(1,707)	(1,566)
Oil and natural gas | Oil and Natural Gas [Member] | Operating Segments [Member]
Revenues:
Revenues	59,776	26,957	114,801	75,481
Operating costs:
Operating costs	16,350	72,354	36,343	103,769
Oil and natural gas | Contract drilling [Member] | Operating Segments [Member]
Revenues:
Revenues	0	0	0	0
Operating costs:
Operating costs	0	0	0	0
Oil and natural gas | Mid-Stream [Member] | Operating Segments [Member]
Revenues:
Revenues	0	0	0	0
Operating costs:
Operating costs	0	0	0	0
Oil and natural gas | Corporate and Other | Corporate, Non-Segment
Revenues:
Revenues	0	0	0	0
Operating costs:
Operating costs	0	0	0	0
Contract drilling
Revenues:
Revenues	18,061	29,202	33,735	65,834
Operating costs:
Operating costs	14,080	20,951	25,951	46,400
Contract drilling | Intersegment Eliminations
Revenues:
Revenues	0	0	0	0
Operating costs:
Operating costs	0	0	0	0
Contract drilling | Oil and Natural Gas [Member] | Operating Segments [Member]
Revenues:
Revenues	0	0	0	0
Operating costs:
Operating costs	0	0	0	0
Contract drilling | Contract drilling [Member] | Operating Segments [Member]
Revenues:
Revenues	18,061	29,202	33,735	65,834
Operating costs:
Operating costs	14,080	20,951	25,951	46,400
Contract drilling | Mid-Stream [Member] | Operating Segments [Member]
Revenues:
Revenues	0	0	0	0
Operating costs:
Operating costs	0	0	0	0
Contract drilling | Corporate and Other | Corporate, Non-Segment
Revenues:
Revenues	0	0	0	0
Operating costs:
Operating costs	0	0	0	0
Gas gathering and processing
Revenues:
Revenues	74,026	32,849	124,225	70,071
Operating costs:
Operating costs	45,056	22,612	84,719	50,223
Gas gathering and processing | Intersegment Eliminations
Revenues:
Revenues	7,703	(4,870)	(1,707)	(10,328)
Operating costs:
Operating costs	(10,120)	(4,057)	(19,567)	(8,765)
Gas gathering and processing | Oil and Natural Gas [Member] | Operating Segments [Member]
Revenues:
Revenues	0	0	0	0
Operating costs:
Operating costs	0	0	0	0
Gas gathering and processing | Contract drilling [Member] | Operating Segments [Member]
Revenues:
Revenues	0	0	0	0
Operating costs:
Operating costs	0	0	0	0
Gas gathering and processing | Mid-Stream [Member] | Operating Segments [Member]
Revenues:
Revenues	66,323	37,719	125,932	80,399
Operating costs:
Operating costs	55,176	26,669	104,286	58,988
Gas gathering and processing | Corporate and Other | Corporate, Non-Segment
Revenues:
Revenues	0	0	0	0
Operating costs:
Operating costs	$ 0	$ 0	$ 0	$ 0