Industry Segment Information (Industry Segment Information) (Details) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2020 USD ($)	Jun. 30, 2019 USD ($)	Jun. 30, 2020 USD ($) segment	Jun. 30, 2019 USD ($)
Segment Reporting [Abstract]
Number of operating segments | segment			3
Revenues:
Revenues	$ 89,007	$ 165,146	$ 211,383	$ 354,837
Operating costs:
Operating costs	115,103	98,041	198,826	201,511
Depreciation, depletion, and amortization	35,960	66,292	97,577	128,418
Impairments	109,318	0	851,242	0
Total expenses	260,381	164,333	1,147,645	329,929
Loss on abandonment of assets	0	0	17,554	0
General and administrative	25,814	10,064	37,367	19,805
(Gain) loss on disposition of assets	877	(422)	1,267	1,193
Income (loss) from operations	(198,065)	(8,829)	(992,450)	3,910
Gain (loss) on derivatives	(6,937)	7,927	(6,454)	995
Write off of debt issuance cost	(2,426)	0	(2,426)	0
Reorganization Items	(7,027)	0	(7,027)	0
Interest, net	(7,608)	(8,995)	(20,865)	(17,533)
Other	43	6	103	11
Income (loss) before income taxes	(222,020)	(9,891)	(1,029,119)	(12,617)
Oil and Natural Gas [Member]
Revenues:
Revenues	26,957	77,815	75,481	163,910
Operating costs:
Operating costs	72,354	37,519	103,769	71,527
Depreciation, depletion, and amortization	22,059	38,751	58,787	74,518
Impairments	109,318		377,154
Total expenses	203,731	76,270	539,710	146,045
Loss on abandonment of assets			17,554
General and administrative	0	0	0	0
(Gain) loss on disposition of assets	(45)	(60)	(58)	(138)
Income (loss) from operations	(176,729)	1,605	(481,725)	18,003
Gain (loss) on derivatives	0	0	0	0
Write off of debt issuance cost	0		0
Reorganization Items	0		0
Interest, net	0	0	0	0
Other	9	0	30	0
Income (loss) before income taxes	(176,720)	1,605	(481,695)	18,003
Contract drilling [Member]
Revenues:
Revenues	29,202	50,773	65,834	108,972
Operating costs:
Operating costs	20,951	36,390	46,400	73,775
Depreciation, depletion, and amortization	2,946	13,504	14,691	26,203
Impairments	0		410,126
Total expenses	23,897	49,894	471,217	99,978
Loss on abandonment of assets			0
General and administrative	0	0	0	0
(Gain) loss on disposition of assets	(548)	(296)	(139)	1,449
Income (loss) from operations	5,853	1,175	(405,244)	7,545
Gain (loss) on derivatives	0	0	0	0
Write off of debt issuance cost	0		0
Reorganization Items	0		0
Interest, net	0	0	0	0
Other	6	0	23	0
Income (loss) before income taxes	5,859	1,175	(405,221)	7,545
Mid-Stream [Member]
Revenues:
Revenues	37,719	54,630	80,399	125,139
Operating costs:
Operating costs	26,669	41,550	58,988	97,679
Depreciation, depletion, and amortization	10,348	12,102	22,621	23,828
Impairments	0		63,962
Total expenses	37,017	53,652	145,571	121,507
Loss on abandonment of assets			0
General and administrative	0	0	0	0
(Gain) loss on disposition of assets	(9)	(66)	(15)	(108)
Income (loss) from operations	711	1,044	(65,157)	3,740
Gain (loss) on derivatives	0	0	0	0
Write off of debt issuance cost	0		0
Reorganization Items	0		0
Interest, net	(542)	(345)	(1,060)	(681)
Other	22	0	39	0
Income (loss) before income taxes	191	699	(66,178)	3,059
Corporate and Other [Member]
Revenues:
Revenues	0	0	0	0
Operating costs:
Operating costs	0	0	0	0
Depreciation, depletion, and amortization	607	1,935	1,478	3,869
Impairments	0		0
Total expenses	607	1,935	1,478	3,869
Loss on abandonment of assets			0
General and administrative	25,814	10,064	37,367	19,805
(Gain) loss on disposition of assets	1,479	0	1,479	(10)
Income (loss) from operations	(27,900)	(11,999)	(40,324)	(23,664)
Gain (loss) on derivatives	(6,937)	7,927	(6,454)	995
Write off of debt issuance cost	(2,426)		(2,426)
Reorganization Items	(7,027)		(7,027)
Interest, net	(7,066)	(8,650)	(19,805)	(16,852)
Other	6	6	11	11
Income (loss) before income taxes	(51,350)	(12,716)	(76,025)	(39,510)
Eliminations [Member]
Revenues:
Revenues	(4,871)	(18,072)	(10,331)	(43,184)
Operating costs:
Operating costs	(4,871)	(17,418)	(10,331)	(41,470)
Depreciation, depletion, and amortization		0	0	0
Impairments	0		0
Total expenses	(4,871)	(17,418)	(10,331)	(41,470)
Loss on abandonment of assets			0
General and administrative	0	0	0	0
(Gain) loss on disposition of assets	0	0	0	0
Income (loss) from operations	0	(654)	0	(1,714)
Gain (loss) on derivatives	0	0	0	0
Write off of debt issuance cost	0		0
Reorganization Items	0		0
Interest, net	0	0	0	0
Other	0	0	0	0
Income (loss) before income taxes	0	(654)	0	(1,714)
Oil and natural gas
Revenues:
Revenues	26,956	77,815	75,478	163,910
Operating costs:
Operating costs	71,540	36,242	102,203	68,956
Oil and natural gas | Oil and Natural Gas [Member]
Revenues:
Revenues	26,957	77,815	75,481	163,910
Operating costs:
Operating costs	72,354	37,519	103,769	71,527
Oil and natural gas | Contract drilling [Member]
Revenues:
Revenues	0	0	0	0
Operating costs:
Operating costs	0	0	0	0
Oil and natural gas | Mid-Stream [Member]
Revenues:
Revenues	0	0	0	0
Operating costs:
Operating costs	0	0	0	0
Oil and natural gas | Corporate and Other [Member]
Revenues:
Revenues	0	0	0	0
Operating costs:
Operating costs	0	0	0	0
Oil and natural gas | Eliminations [Member]
Revenues:
Revenues	(1)	0	(3)	0
Operating costs:
Operating costs	(814)	(1,277)	(1,566)	(2,571)
Contract drilling
Revenues:
Revenues	29,202	43,037	65,834	94,192
Operating costs:
Operating costs	20,951	29,308	46,400	60,709
Contract drilling | Oil and Natural Gas [Member]
Revenues:
Revenues	0	0	0	0
Operating costs:
Operating costs	0	0	0	0
Contract drilling | Contract drilling [Member]
Revenues:
Revenues	29,202	50,773	65,834	108,972
Operating costs:
Operating costs	20,951	36,390	46,400	73,775
Contract drilling | Mid-Stream [Member]
Revenues:
Revenues	0	0	0	0
Operating costs:
Operating costs	0	0	0	0
Contract drilling | Corporate and Other [Member]
Revenues:
Revenues	0	0	0	0
Operating costs:
Operating costs	0	0	0	0
Contract drilling | Eliminations [Member]
Revenues:
Revenues	0	(7,736)	0	(14,780)
Operating costs:
Operating costs	0	(7,082)	0	(13,066)
Gas gathering and processing
Revenues:
Revenues	32,849	44,294	70,071	96,735
Operating costs:
Operating costs	22,612	32,491	50,223	71,846
Gas gathering and processing | Oil and Natural Gas [Member]
Revenues:
Revenues	0	0	0	0
Operating costs:
Operating costs	0	0	0	0
Gas gathering and processing | Contract drilling [Member]
Revenues:
Revenues	0	0	0	0
Operating costs:
Operating costs	0	0	0	0
Gas gathering and processing | Mid-Stream [Member]
Revenues:
Revenues	37,719	54,630	80,399	125,139
Operating costs:
Operating costs	26,669	41,550	58,988	97,679
Gas gathering and processing | Corporate and Other [Member]
Revenues:
Revenues	0	0	0	0
Operating costs:
Operating costs	0	0	0	0
Gas gathering and processing | Eliminations [Member]
Revenues:
Revenues	(4,870)	(10,336)	(10,328)	(28,404)
Operating costs:
Operating costs	$ (4,057)	$ (9,059)	$ (8,765)	$ (25,833)