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Commitments and Contingencies Crude Oil Releases (Details) $ in Millions | Sep. 30, 2016 USD ($) | Jan. 31, 2016 bbl | Apr. 30, 2015 bbl | Mar. 31, 2013 bbl
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Modisette Release [Member] |  |  |  |
Loss Contingencies [Line Items] |  |  |  |
Crude oil released (barrels) |  | 30 |  |
Paline Release [Member] |  |  |  |
Loss Contingencies [Line Items] |  |  |  |
Crude oil released (barrels) |  | 350 |  |
Accrual for Environmental Loss Contingencies | $ | $ 0.1 |  |  |
Fouke Release [Member] |  |  |  |
Loss Contingencies [Line Items] |  |  |  |
Crude oil released (barrels) |  |  | 130 |
Magnolia Release [Member] |  |  |  |
Loss Contingencies [Line Items] |  |  |  |
Crude oil released (barrels) |  |  |  | 5,900
Accrual for Environmental Loss Contingencies | $ | $ 1.0 |  |  |

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- Definition Total costs accrued as of the balance sheet date for environmental loss contingencies. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 450 -SubTopic 20 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=25496072&loc=d3e14326-108349 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 410 -SubTopic 30 -Section 50 -Paragraph 7 -URI http://asc.fasb.org/extlink&oid=6393242&loc=d3e13207-110859 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 450 -SubTopic 20 -Section 25 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6395460&loc=d3e13647-108346 + Details
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- Details
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