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Commitments and Contingencies Commitments and Contingencies (Details) MMcf in Thousands, $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2016 USD ($) MMcf MMBbls	Sep. 30, 2015 USD ($)	Sep. 30, 2016 USD ($) MMcf MMBbls	Sep. 30, 2015 USD ($)	Dec. 31, 2015 USD ($) MMcf
Water Disposal Agreement [Member]
Other Commitments [Line Items]
Water Delivery Commitments and Contracts, Remaining Contractual Volume | MMBbls	25.4		25.4
Contractual Obligation	$ 23.0		$ 23.0
Drilling Rig Leasing Contracts [Member]
Other Commitments [Line Items]
Early Termination Penalty for Rig Contract Cancellation	15.1		15.1
Gain (Loss) on Contract Termination	(1.1)	$ (2.2)	(8.7)	$ (8.1)
Contractual Obligation	20.0		20.0
Gas gathering and Oil and Gas Through-put Commitments [Member]
Other Commitments [Line Items]
Contractual Obligation, Amended Gathering Agreements Related to Non-Operated Eagle Ford Assets	333.2		333.2
Contractual Payments Receivable, Amended Gathering Agreements Related to Non-Operated Eagle Ford Assets	235.2		235.2
Decrease in Contractual Obligation					$ 118.2
Contractual Obligation	$ 1,000.0		$ 1,000.0
Crude Oil Transportation Commitment [Member]
Other Commitments [Line Items]
Oil and Gas Delivery Commitments and Contracts, Remaining Contractual Volume on Amended Gathering Agreements Related to Non-Operated Eagle Ford Assets | MMBbls	38		38
Oil and Gas Delivery Commitments and Contracts, Remaining Contractual Volume | MMBbls	69		69
Natural Gas Transportation Commitment [Member]
Other Commitments [Line Items]
Oil and Gas Delivery Commitments and Contracts, Remaining Contractual Volume on Amended Gathering Agreements Related to Non-Operated Eagle Ford Assets | MMcf	290		290
Oil and Gas Delivery Commitments and Contracts, Decrease in Remaining Contractual Volume | MMcf					829
Oil and Gas Delivery Commitments and Contracts, Remaining Contractual Volume | MMcf	1,556		1,556
Natural Gas Liquids Transportation Commitment [Member]
Other Commitments [Line Items]
Oil and Gas Delivery Commitments and Contracts, Remaining Contractual Volume | MMBbls	13		13

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- Definition

Contractual Obligation, Amended Gathering Agreements Related to Non-Operated Eagle Ford Assets

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Contractual Payments Receivable, Amended Gathering Agreements Related to Non-Operated Eagle Ford Assets

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Decrease in Contractual Obligation

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Early Termination Penalty for Rig Contract Cancellation

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Total amount of water committed to be supplied under existing contracts or agreements.

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Gain (loss) related to the termination of a contract between the parties. The termination may be due to many causes including early termination of a lease by a lessee, a breach of contract by one party, or a failure to perform.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 420
-SubTopic 10
-Section 50
-Paragraph 1
-Subparagraph (b)(1)
-URI http://asc.fasb.org/extlink&oid=6394359&loc=d3e17939-110869

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
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-Section 45
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-URI http://asc.fasb.org/extlink&oid=66902209&loc=d3e3602-108585

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Total amount of product committed to be supplied under existing contracts or agreements.

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Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher SEC
-Name Regulation S-K (SK)
-Number 229
-Section 1207
-Paragraph (a)
-Subparagraph (2)

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