Supplemental Condensed Consolidating Financial Information (Supplemental Condensed Consolidating Statement of Cash Flows) (Details) (USD $) In Thousands, unless otherwise specified	9 Months Ended
	Mar. 31, 2015	Mar. 31, 2014
Cash and cash equivalents at end of period	$ 95
Successor Company [Member]
Net cash provided by operating activities	90,344
Property acquisitions	(350)
Capital expenditures	(271,496)
Other property and equipment additions	(58)
Net cash used in investing activities	(271,904)
Proceeds from (repayments of) indebtedness	(325,000)
Proceeds from intercompany promissory note	325,000
Advances from EGC	177,832
Deferred financing costs	(1,089)
Proceeds from (Payments for) Other Financing Activities	(689)
Net cash provided by financing activities	176,054
Net increase in cash and cash equivalents	(5,506)
Cash and cash equivalents at beginning of period	5,601
Cash and cash equivalents at end of period	95
Successor Company [Member] \| Parent Company [Member]
Net cash provided by operating activities	83,979
Property acquisitions	(350)
Capital expenditures	(265,131)
Other property and equipment additions	(58)
Net cash used in investing activities	(265,539)
Proceeds from (repayments of) indebtedness	(325,000)
Proceeds from intercompany promissory note	325,000
Advances from EGC	177,832
Deferred financing costs	(1,089)
Proceeds from (Payments for) Other Financing Activities	(689)
Net cash provided by financing activities	176,054
Net increase in cash and cash equivalents	(5,506)
Cash and cash equivalents at beginning of period	5,601
Cash and cash equivalents at end of period	95
Successor Company [Member] \| Guarantor Subsidiaries [Member]
Net cash provided by operating activities	6,365
Capital expenditures	(6,365)
Net cash used in investing activities	(6,365)
Predecessor Company [Member]
Net cash provided by operating activities		258,023
Decrease in restricted cash		51,757
Property acquisitions		(83,412)
Deposit for Nexen Acquisition		(7,040)
Capital expenditures		(268,905)
Other property and equipment additions		(984)
Proceeds from sale of assets		80
Net cash used in investing activities		(308,504)
Proceeds from (repayments of) indebtedness		55,000
Deferred financing costs		(206)
Purchase of shares into treasury		(4,544)
Exercise of stock options		794
Net cash provided by financing activities		51,044
Net increase in cash and cash equivalents		563
Cash and cash equivalents at beginning of period		3,885
Cash and cash equivalents at end of period		4,448
Predecessor Company [Member] \| Parent Company [Member]
Net cash provided by operating activities		235,046
Decrease in restricted cash		51,757
Property acquisitions		(83,412)
Deposit for Nexen Acquisition		(7,040)
Capital expenditures		(245,928)
Other property and equipment additions		(984)
Proceeds from sale of assets		80
Net cash used in investing activities		(285,527)
Proceeds from (repayments of) indebtedness		55,000
Deferred financing costs		(206)
Purchase of shares into treasury		(4,544)
Exercise of stock options		794
Net cash provided by financing activities		51,044
Net increase in cash and cash equivalents		563
Cash and cash equivalents at beginning of period		3,885
Cash and cash equivalents at end of period		4,448
Predecessor Company [Member] \| Guarantor Subsidiaries [Member]
Net cash provided by operating activities		22,977
Capital expenditures		(22,977)
Net cash used in investing activities		$ (22,977)

EPL OIL & GAS, INC. 10-Q