The total of the component of interest expense representing the noncash expenses charged against earnings in the period to amortize the long-term deferred financing costs and other income (expense) included in net income that results in no cash inflows or outflows in the period. Includes noncash adjustments to reconcile net income (loss) to cash provided by (used in) operating activities that are not separately disclosed.

No definition available.

Condensed Consolidating Financial Statements - Schedule of Condensed Consolidating Statement of Cash Flows (Detail) - USD ($) $ in Thousands					3 Months Ended								12 Months Ended
	Nov. 13, 2017	Oct. 21, 2016	Apr. 01, 2016	Feb. 02, 2016	Dec. 31, 2017	Sep. 30, 2017	Jun. 30, 2017	Mar. 31, 2017	Dec. 31, 2016	Sep. 30, 2016	Jun. 30, 2016	Mar. 31, 2016	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Cash flows from operating activities:
Net income (loss) including non-controlling interests					$ 128,117	$ (41,064)	$ 16,568	$ 23,825	$ (54,688)	$ (33,942)	$ (89,931)	$ (64,455)	$ 127,446	$ (243,016)	$ (40,248)
Adjustments to reconcile net income to net cash provided by (used in) operating activities:
Equity in loss of subsidiaries													0	0	0
Depreciation, depletion and amortization													530,802	476,331	485,322
Gain on extinguishment of debt													0	(4,741)	0
Loss on sale of properties													(1,774)	1,303	0
Impairment													6,887	4,684	46,109
Deferred income taxes													(202,884)	(128,538)	(16,114)
Derivative instruments													71,657	105,317	(210,376)
Equity-based compensation expenses													26,534	24,103	25,272
Deferred financing costs amortization and other													18,311	14,334	12,299
Working capital and other changes:
Change in accounts receivable, net													(158,587)	(11,923)	108,461
Change in inventory													(2,501)	254	6,873
Change in prepaid expenses													(838)	(295)	1,828
Change in other current assets													148	(305)	6,489
Change in long-term inventory and other assets													(12,143)	(151)	(950)
Change in accounts payable, interest payable and accrued liabilities													115,308	(13,839)	(71,617)
Change in other current liabilities													(10,450)	4,490	6,500
Change in other liabilities													(40)	10	(33)
Net cash provided by operating activities													507,876	228,018	359,815
Cash flows from investing activities:
Capital expenditures													(647,349)	(426,256)	(819,847)
Acquisitions of oil and gas properties													(61,874)	(781,522)	(28,817)
Proceeds from sale of properties			$ 12,800										5,774	12,333	1,075
Costs related to sale of properties													(366)	(310)	0
Derivative settlements													(8,264)	121,977	370,410
Advances from joint interest partners													(2,681)	2,950	(1,969)
Net cash used in investing activities													(714,760)	(1,070,828)	(479,148)
Cash flows from financing activities:
Proceeds from Revolving Credit Facilities													1,162,000	1,407,000	630,000
Principal payments on revolving credit facility													(1,377,000)	(1,182,000)	(992,000)
Repurchase of senior unsecured notes													0	(435,907)	0
Proceeds from issuance of senior unsecured convertible notes													0	300,000	0
Deferred financing costs													(2,714)	(9,127)	(14,632)
Proceeds from sale of common stock	$ 302,600	$ 583,900		$ 182,800									302,191	766,670	462,833
Proceeds from sale of Oasis Midstream common units, net of offering costs													134,185	0	0
Purchases of treasury stock													(6,229)	(2,330)	(2,949)
Investment in / capital contributions from subsidiaries													0	0	0
Other													(55)	0	0
Net cash provided by financing activities													212,378	844,306	83,252
Increase (decrease) in cash and cash equivalents													5,494	1,496	(36,081)
Beginning of period								11,226				9,730	11,226	9,730	45,811
End of period					16,720				11,226				16,720	11,226	9,730
Intercompany Eliminations
Cash flows from operating activities:
Net income (loss) including non-controlling interests													(360,887)	140,978	(69,986)
Adjustments to reconcile net income to net cash provided by (used in) operating activities:
Equity in loss of subsidiaries													358,921	(140,978)	69,986
Depreciation, depletion and amortization													(2,439)	0	0
Gain on extinguishment of debt														0
Loss on sale of properties													0	0
Impairment													0	0	0
Deferred income taxes													0	0	0
Derivative instruments													0	0	0
Equity-based compensation expenses													0	0	0
Deferred financing costs amortization and other													0	0	0
Working capital and other changes:
Change in accounts receivable, net													277,887	30,883	156,496
Change in inventory													0	0	0
Change in prepaid expenses													0	0	0
Change in other current assets													0	0	0
Change in long-term inventory and other assets													0	0	0
Change in accounts payable, interest payable and accrued liabilities													(277,887)	(30,883)	(156,496)
Change in other current liabilities													0	0	0
Change in other liabilities													0	0	0
Net cash provided by operating activities													(4,405)	0	0
Cash flows from investing activities:
Capital expenditures													0	0	0
Acquisitions of oil and gas properties													66,679	0	0
Proceeds from sale of properties													(66,679)	0	0
Costs related to sale of properties													0	0
Derivative settlements													0	0	0
Advances from joint interest partners													0	0	0
Net cash used in investing activities													0	0	0
Cash flows from financing activities:
Proceeds from Revolving Credit Facilities													0	0	0
Principal payments on revolving credit facility													0	0	0
Repurchase of senior unsecured notes														0
Proceeds from issuance of senior unsecured convertible notes														0
Deferred financing costs													0	0	0
Proceeds from sale of common stock													0	0	0
Proceeds from sale of Oasis Midstream common units, net of offering costs													0
Purchases of treasury stock													0	0	0
Investment in / capital contributions from subsidiaries													4,405	0	0
Other													0
Net cash provided by financing activities													4,405	0	0
Increase (decrease) in cash and cash equivalents													0	0	0
Beginning of period								0				0	0	0	0
End of period					0				0				0	0	0
Parent/ Issuer
Cash flows from operating activities:
Net income (loss) including non-controlling interests													123,796	(243,016)	(40,248)
Adjustments to reconcile net income to net cash provided by (used in) operating activities:
Equity in loss of subsidiaries													(323,953)	140,978	(69,986)
Depreciation, depletion and amortization													0	0	0
Gain on extinguishment of debt														(4,741)
Loss on sale of properties													0	0
Impairment													0	0	0
Deferred income taxes													41,213	(48,796)	(55,857)
Derivative instruments													0	0	0
Equity-based compensation expenses													25,436	23,346	24,762
Deferred financing costs amortization and other													15,392	9,107	4,964
Working capital and other changes:
Change in accounts receivable, net													(173,668)	(250,737)	(482)
Change in inventory													0	0	0
Change in prepaid expenses													9	3	19
Change in other current assets													0	0	0
Change in long-term inventory and other assets													0	100	0
Change in accounts payable, interest payable and accrued liabilities													7,074	(230,518)	156,039
Change in other current liabilities													0	0	0
Change in other liabilities													0	0	0
Net cash provided by operating activities													(284,701)	(604,274)	19,211
Cash flows from investing activities:
Capital expenditures													0	0	0
Acquisitions of oil and gas properties													0	0	0
Proceeds from sale of properties													0	0	0
Costs related to sale of properties													0	0
Derivative settlements													0	0	0
Advances from joint interest partners													0	0	0
Net cash used in investing activities													0	0	0
Cash flows from financing activities:
Proceeds from Revolving Credit Facilities													0	0	0
Principal payments on revolving credit facility													0	0	0
Repurchase of senior unsecured notes														(435,907)
Proceeds from issuance of senior unsecured convertible notes														300,000
Deferred financing costs													0	(8,197)	(11,045)
Proceeds from sale of common stock													302,191	766,670	462,833
Proceeds from sale of Oasis Midstream common units, net of offering costs													0
Purchases of treasury stock													(6,229)	(2,330)	(2,949)
Investment in / capital contributions from subsidiaries													(11,194)	(16,573)	(468,049)
Other													(55)
Net cash provided by financing activities													284,713	603,663	(19,210)
Increase (decrease) in cash and cash equivalents													12	(611)	1
Beginning of period								166				777	166	777	776
End of period					178				166				178	166	777
Combined Guarantor Subsidiaries
Cash flows from operating activities:
Net income (loss) including non-controlling interests													329,569	(140,978)	69,986
Adjustments to reconcile net income to net cash provided by (used in) operating activities:
Equity in loss of subsidiaries													(34,968)	0	0
Depreciation, depletion and amortization													528,615	476,331	485,322
Gain on extinguishment of debt														0
Loss on sale of properties													(1,774)	1,303
Impairment													6,887	4,684	46,109
Deferred income taxes													(244,097)	(79,742)	39,743
Derivative instruments													71,657	105,317	(210,376)
Equity-based compensation expenses													1,045	757	510
Deferred financing costs amortization and other													2,794	5,227	7,335
Working capital and other changes:
Change in accounts receivable, net													(209,183)	207,931	(47,553)
Change in inventory													(2,501)	254	6,873
Change in prepaid expenses													(98)	(298)	1,809
Change in other current assets													148	(305)	6,489
Change in long-term inventory and other assets													(12,143)	(251)	(950)
Change in accounts payable, interest payable and accrued liabilities													329,520	247,562	(71,160)
Change in other current liabilities													(10,450)	4,490	6,500
Change in other liabilities													(40)	10	(33)
Net cash provided by operating activities													754,981	832,292	340,604
Cash flows from investing activities:
Capital expenditures													(594,945)	(426,256)	(819,847)
Acquisitions of oil and gas properties													(61,874)	(781,522)	(28,817)
Proceeds from sale of properties													72,453	12,333	1,075
Costs related to sale of properties													(366)	(310)
Derivative settlements													(8,264)	121,977	370,410
Advances from joint interest partners													(2,681)	2,950	(1,969)
Net cash used in investing activities													(595,677)	(1,070,828)	(479,148)
Cash flows from financing activities:
Proceeds from Revolving Credit Facilities													1,084,000	1,407,000	630,000
Principal payments on revolving credit facility													(1,377,000)	(1,182,000)	(992,000)
Repurchase of senior unsecured notes														0
Proceeds from issuance of senior unsecured convertible notes														0
Deferred financing costs													(577)	(930)	(3,587)
Proceeds from sale of common stock													0	0	0
Proceeds from sale of Oasis Midstream common units, net of offering costs													0
Purchases of treasury stock													0	0	0
Investment in / capital contributions from subsidiaries													138,872	16,573	468,049
Other													0
Net cash provided by financing activities													(154,705)	240,643	102,462
Increase (decrease) in cash and cash equivalents													4,599	2,107	(36,082)
Beginning of period								11,060				$ 8,953	11,060	8,953	45,035
End of period					15,659				11,060				15,659	11,060	$ 8,953
Combined Non-guarantor Subsidiaries
Cash flows from operating activities:
Net income (loss) including non-controlling interests													34,968
Adjustments to reconcile net income to net cash provided by (used in) operating activities:
Equity in loss of subsidiaries													0
Depreciation, depletion and amortization													4,626
Loss on sale of properties													0
Impairment													0
Deferred income taxes													0
Derivative instruments													0
Equity-based compensation expenses													53
Deferred financing costs amortization and other													125
Working capital and other changes:
Change in accounts receivable, net													(53,623)
Change in inventory													0
Change in prepaid expenses													(749)
Change in other current assets													0
Change in long-term inventory and other assets													0
Change in accounts payable, interest payable and accrued liabilities													56,601
Change in other current liabilities													0
Change in other liabilities													0
Net cash provided by operating activities													42,001
Cash flows from investing activities:
Capital expenditures													(52,404)
Acquisitions of oil and gas properties													(66,679)
Proceeds from sale of properties													0
Costs related to sale of properties													0
Derivative settlements													0
Advances from joint interest partners													0
Net cash used in investing activities													(119,083)
Cash flows from financing activities:
Proceeds from Revolving Credit Facilities													78,000
Principal payments on revolving credit facility													0
Deferred financing costs													(2,137)
Proceeds from sale of common stock													0
Proceeds from sale of Oasis Midstream common units, net of offering costs													134,185
Purchases of treasury stock													0
Investment in / capital contributions from subsidiaries													(132,083)
Other													0
Net cash provided by financing activities													77,965
Increase (decrease) in cash and cash equivalents													883
Beginning of period								$ 0					0
End of period					$ 883				$ 0				$ 883	$ 0