Condensed Consolidated Statements of Cash Flows (Unaudited) - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019
OPERATING ACTIVITIES:
Net loss	$ (1,019,239)	$ (10,299)
Adjustments to reconcile net loss to net cash provided by operating activities:
Depreciation, depletion, and amortization	97,577	128,418
Impairments (Note 3)	851,242	0
Loss on abandonment of assets (Note 3)	17,554	0
Amortization of debt issuance costs and debt discount (Note 8)	1,079	1,115
(Gain) loss on derivatives (Note 12)	6,454	(995)
Cash receipts (payments) on derivatives settled (Note 12)	(691)	5,314
Loss on disposition of assets	1,267	1,193
Write-off of debt issuance costs	(2,426)	0
Deferred tax benefit	(8,963)	(2,318)
Employee stock compensation plans	4,179	11,187
Bad debt expense	1,923	0
ARO liability accretion (Note 9)	1,169	1,168
Contract assets and liabilities, net (Note 4)	1,790	(1,283)
Noncash reorganization items	7,027	0
Other, net	11,493	(51)
Changes in operating assets and liabilities increasing (decreasing) cash:
Accounts receivable	26,587	26,939
Material and supplies	43	(43)
Prepaid expenses and other	(2,703)	(377)
Accounts payable	(22,876)	(30,374)
Accrued liabilities	48,244	(1,245)
Income taxes	906	0
Contract advances	(21)	(848)
Net cash provided by operating activities	26,467	127,501
INVESTING ACTIVITIES:
Capital expenditures	(23,804)	(246,638)
Producing properties and other acquisitions	(210)	(3,313)
Proceeds from disposition of property and equipment	4,497	7,340
Net cash used in investing activities	(19,517)	(242,611)
FINANCING ACTIVITIES:
Borrowings under line of credit, including borrowings under DIP credit facility	79,400	271,200
Payments under line of credit	(38,100)	(160,200)
DIP financing costs	(990)	0
Net payments on finance leases	(2,061)	(1,980)
Employee taxes paid by withholding shares	(43)	(4,073)
Distributions to non-controlling interest	0	(918)
Bank overdrafts	8,733	(5,298)
Net cash provided by financing activities	29,473	109,327
Net increase (decrease) in cash and cash equivalents	36,423	(5,783)
Cash and cash equivalents, beginning of period	571	6,452
Cash and cash equivalents, end of period	36,994	669
Cash paid during the year for:
Interest paid (net of capitalized)	4,795	15,748
Income taxes	0	0
Changes in accounts payable and accrued liabilities related to purchases of property, plant, and equipment	5,974	(6,260)
Non-cash (additions) reductions to oil and natural gas properties related to asset retirement obligations	3,548	(2,057)
Non-cash trade of property, plant, and equipment	$ 548	$ 0