Condensed Consolidating Financial Information - Summary of Condensed Consolidating Cash Flows (Details) - USD ($) $ in Thousands	9 Months Ended
Sep. 30, 2019	Sep. 30, 2018
Cash flows from operating activities:
Net cash provided by (used in) operating activities	$ 332,413	$ 143,687
Cash flows from investing activities:
Exploration, development, and other capital expenditures	(372,920)	(174,349)
Cash (paid for) acquired in acquisitions	(32,916)	278,409
Proceeds from sale of other property and equipment	5,369
Net cash provided by (used in) investing activities	(400,467)	104,060
Cash flows from financing activities:
Redemption of Senior Notes and other long-term debt	(10,567)	(25,151)
Proceeds from Bank Credit Facility	75,000	319,000
Repayment of Bank Credit Facility	(25,000)	(54,000)
Deferred financing costs	(1,268)	(16,990)
Other deferred payments	(9,921)
Payments of capital lease	(10,344)	(9,874)
Employee stock transactions	(326)
Net cash provided by (used in) financing activities	17,574	(190,015)
Net increase (decrease) in cash, cash equivalents and restricted cash	(50,480)	57,732
Cash, cash equivalents and restricted cash:
Balance, beginning of period	141,162	33,433
Balance, end of period	90,682	91,165
LLC Bank Credit Facility
Cash flows from financing activities:
Repayment of Bank Credit Facility		(403,000)
Talos
Cash flows from operating activities:
Net cash provided by (used in) operating activities	(558)
Cash flows from financing activities:
Capital contributions	558
Net cash provided by (used in) financing activities	558
Talos Issuers
Cash flows from operating activities:
Net cash provided by (used in) operating activities	(64,050)	(126,105)
Cash flows from investing activities:
Exploration, development, and other capital expenditures	(1,577)	(12,966)
Investments in subsidiaries	(1,119,219)	(778,148)
Distributions from subsidiaries	1,203,194	1,097,505
Net cash provided by (used in) investing activities	82,398	306,391
Cash flows from financing activities:
Redemption of Senior Notes and other long-term debt		(24,977)
Proceeds from Bank Credit Facility	75,000	319,000
Repayment of Bank Credit Facility	(25,000)	(54,000)
Deferred financing costs	(1,268)	(16,990)
Net cash provided by (used in) financing activities	48,732	(179,967)
Net increase (decrease) in cash, cash equivalents and restricted cash	67,080	319
Cash, cash equivalents and restricted cash:
Balance, beginning of period	13,541	22,315
Balance, end of period	80,621	22,634
Talos Issuers \| LLC Bank Credit Facility
Cash flows from financing activities:
Repayment of Bank Credit Facility		(403,000)
Guarantors
Cash flows from operating activities:
Net cash provided by (used in) operating activities	412,445	269,841
Cash flows from investing activities:
Exploration, development, and other capital expenditures	(301,603)	(159,368)
Cash (paid for) acquired in acquisitions	(32,916)	278,409
Proceeds from sale of other property and equipment	5,369
Distributions from subsidiaries		(9)
Net cash provided by (used in) investing activities	(329,150)	119,032
Cash flows from financing activities:
Redemption of Senior Notes and other long-term debt	(10,567)	(174)
Other deferred payments	(9,921)
Payments of capital lease	(10,344)	(9,874)
Capital contributions	1,051,661	770,436
Employee stock transactions	(326)
Distributions to subsidiary issuer	(1,202,546)	(1,095,165)
Net cash provided by (used in) financing activities	(182,043)	(334,777)
Net increase (decrease) in cash, cash equivalents and restricted cash	(98,748)	54,096
Cash, cash equivalents and restricted cash:
Balance, beginning of period	102,049	9,048
Balance, end of period	3,301	63,144
Non-Guarantors
Cash flows from operating activities:
Net cash provided by (used in) operating activities	(15,424)	(49)
Cash flows from investing activities:
Exploration, development, and other capital expenditures	(69,740)	(2,015)
Net cash provided by (used in) investing activities	(69,740)	(2,015)
Cash flows from financing activities:
Capital contributions	67,000	7,712
Distributions to subsidiary issuer	(648)	(2,331)
Net cash provided by (used in) financing activities	66,352	5,381
Net increase (decrease) in cash, cash equivalents and restricted cash	(18,812)	3,317
Cash, cash equivalents and restricted cash:
Balance, beginning of period	25,572	2,070
Balance, end of period	6,760	5,387
Elimination
Cash flows from investing activities:
Investments in subsidiaries	1,119,219	778,148
Distributions from subsidiaries	(1,203,194)	(1,097,496)
Net cash provided by (used in) investing activities	(83,975)	(319,348)
Cash flows from financing activities:
Capital contributions	(1,119,219)	(778,148)
Distributions to subsidiary issuer	1,203,194	1,097,496
Net cash provided by (used in) financing activities	$ 83,975	$ 319,348

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