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Commitments and Contingencies Commitments and Contingencies (Details) MMcf in Thousands, $ in Millions | 3 Months Ended | 12 Months Ended
--- | --- | ---
Mar. 31, 2016 USD ($) MMcf MMBbls | Mar. 31, 2015 USD ($) | Dec. 31, 2015 USD ($) MMcf
Drilling Rig Leasing Contracts [Member] |  |  |
Other Commitments [Line Items] |  |  |
Gain (Loss) on Contract Termination | $ (5.0) | $ (3.2) |
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 | 351.2 |  |
Contractual Payments Receivable, Amended Gathering Agreements Related to Non-Operated Eagle Ford Assets | 247.9 |  |
Decrease in Contractual Obligation |  |  | $ 118.2
Contractual Obligation | $ 1,100.0 |  |
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 | 40 |  |
Oil and Gas Delivery Commitments and Contracts, Remaining Contractual Volume | MMBbls | 75 |  |
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 | 303 |  |
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 | 1,624 |  |
Natural Gas Liquids Transportation Commitment [Member] |  |  |
Other Commitments [Line Items] |  |  |
Oil and Gas Delivery Commitments and Contracts, Remaining Contractual Volume | MMBbls | 14 |  |

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- Definition Contractual Obligation, Amended Gathering Agreements Related to Non-Operated Eagle Ford Assets + References No definition available. + Details
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- Definition Contractual Payments Receivable, Amended Gathering Agreements Related to Non-Operated Eagle Ford Assets + References No definition available. + Details
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- Definition 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 -SubTopic 10 -Section 45 -Paragraph 28 -URI http://asc.fasb.org/extlink&oid=66902209&loc=d3e3602-108585 + Details
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- Definition Total amount of product committed to be supplied under existing contracts or agreements. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-K (SK) -Number 229 -Section 1207 -Paragraph (a) -Subparagraph (2) + Details
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