CONSOLIDATED STATEMENT OF CASH FLOWS - USD ($)	2 Months Ended	10 Months Ended	12 Months Ended
	Feb. 28, 2017	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Cash flows from operating activities:
Net income (loss)		$ (247,639,000)
Adjustments to reconcile net income (loss) to net cash provided by operating activities:
Depreciation, depletion and amortization		99,890,000
Write-down of oil and gas properties		256,435,000
Accretion expense		21,151,000
Deferred income tax provision (benefit)		0
(Gain) loss on sale of oil and gas properties		105,000
Settlement of asset retirement obligations		(80,671,000)
Non-cash stock compensation expense		1,252,000
Excess tax benefits		0
Non-cash derivative expense		15,548,000
Non-cash interest expense		4,000
Non-cash reorganization items		0
Other non-cash expense		1,245,000
Change in current income taxes		(13,744,000)
(Increase) decrease in accounts receivable		2,455,000
(Increase) decrease in other current assets		4,648,000
Decrease in inventory		0
Increase (decrease) in accounts payable		17,113,000
Increase (decrease) in other current liabilities		10,677,000
Investment in derivative contracts		(2,416,000)
Other		3,023,000
Net cash provided by (used in) operating activities		89,076,000
Cash flows from investing activities:
Investment in oil and gas properties		(65,282,000)
Proceeds from sale of oil and gas properties, net of expenses		20,633,000
Investment in fixed and other assets		(163,000)
Change in restricted funds		56,805,000
Net cash provided by (used in) investing activities		11,993,000
Cash flows from financing activities:
Proceeds from bank borrowings		0
Repayments of bank borrowings		0
Proceeds from building loan		0
Repayments of building loan		(337,000)
Cash payment to noteholders		0
Stock issuance costs - Talos combination		(184,000)
Debt issuance costs		0
Excess tax benefits		0
Net payments for share-based compensation		(19,000)
Net cash provided by (used in) financing activities		(540,000)
Effect of exchange rate changes on cash		0
Net change in cash and cash equivalents		100,529,000
Cash and cash equivalents, beginning of period		162,966,000
Cash and cash equivalents, end of period	$ 162,966,000	263,495,000
Supplemental cash flow information:
Cash paid for interest, net of amount capitalized		(10,256,000)
Cash refunded for income taxes, net of amounts paid		5,420,000
Predecessor
Cash flows from operating activities:
Net income (loss)	630,317,000		$ (590,586,000)	$ (1,090,915,000)
Adjustments to reconcile net income (loss) to net cash provided by operating activities:
Depreciation, depletion and amortization	37,429,000		220,079,000	281,688,000
Write-down of oil and gas properties	0		357,431,000	1,362,447,000
Accretion expense	5,447,000		40,229,000	25,988,000
Deferred income tax provision (benefit)	0		13,080,000	(272,311,000)
(Gain) loss on sale of oil and gas properties	(213,453,000)		0	0
Settlement of asset retirement obligations	(3,641,000)		(20,514,000)	(72,382,000)
Non-cash stock compensation expense	2,645,000		8,443,000	12,324,000
Excess tax benefits	0		0	(1,586,000)
Non-cash derivative expense	1,778,000		1,471,000	16,440,000
Non-cash interest expense	0		18,404,000	17,788,000
Non-cash reorganization items	(458,677,000)		8,332,000	0
Other non-cash expense	172,000		6,248,000	0
Change in current income taxes	3,570,000		20,088,000	(37,377,000)
(Increase) decrease in accounts receivable	6,354,000		(1,412,000)	43,724,000
(Increase) decrease in other current assets	(2,274,000)		(3,493,000)	1,767,000
Decrease in inventory	0		0	1,304,000
Increase (decrease) in accounts payable	(4,652,000)		1,026,000	(14,582,000)
Increase (decrease) in other current liabilities	(9,653,000)		9,897,000	(25,936,000)
Investment in derivative contracts	(3,736,000)		0	0
Other	2,490,000		(10,135,000)	(907,000)
Net cash provided by (used in) operating activities	(5,884,000)		78,588,000	247,474,000
Cash flows from investing activities:
Investment in oil and gas properties	(8,754,000)		(237,952,000)	(522,047,000)
Proceeds from sale of oil and gas properties, net of expenses	505,383,000		0	22,839,000
Investment in fixed and other assets	(61,000)		(1,266,000)	(1,549,000)
Change in restricted funds	(75,547,000)		1,046,000	179,467,000
Net cash provided by (used in) investing activities	421,021,000		(238,172,000)	(321,290,000)
Cash flows from financing activities:
Proceeds from bank borrowings	0		477,000,000	5,000,000
Repayments of bank borrowings	(341,500,000)		(135,500,000)	(5,000,000)
Proceeds from building loan	0		0	11,770,000
Repayments of building loan	(24,000)		(423,000)	0
Cash payment to noteholders	(100,000,000)		0	0
Stock issuance costs - Talos combination	0		0	0
Debt issuance costs	(1,055,000)		(900,000)	(68,000)
Excess tax benefits	0		0	1,586,000
Net payments for share-based compensation	(173,000)		(762,000)	(3,127,000)
Net cash provided by (used in) financing activities	(442,752,000)		339,415,000	10,161,000
Effect of exchange rate changes on cash	0		(9,000)	(74,000)
Net change in cash and cash equivalents	(27,615,000)		179,822,000	(63,729,000)
Cash and cash equivalents, beginning of period	190,581,000	$ 162,966,000	10,759,000	74,488,000
Cash and cash equivalents, end of period	162,966,000		190,581,000	10,759,000
Supplemental cash flow information:
Cash paid for interest, net of amount capitalized	0		(32,130,000)	(34,394,000)
Cash refunded for income taxes, net of amounts paid	$ 0		$ 25,762,000	$ 7,212,000