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Subsequent Events - Additional Information (Detail) (Subsequent Event [Member], USD $) In Millions, unless otherwise specified | 1 Months Ended |
--- | --- | ---
Jan. 31, 2014 | Feb. 28, 2014 2014 Swap Agreement [Member] bbl | Feb. 28, 2014 2015 Swap Agreement [Member] bbl | Feb. 28, 2014 2016 Swap Agreement [Member] bbl
Subsequent Event [Line Items] |  |  |  |
Proceeds from divestiture of businesses | $ 333.0 |  |  |
Total notional amount of oil barrels |  | 1,100,000 | 1,516,000 | 62,000

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- Definition Aggregate notional amount of derivative expressed in nonmonetary units. For example, the number of barrels specified in a fuel oil forward purchase contract. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Article 12 -Section 13 -Sentence Column B + Details
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- Definition The cash inflow associated with the amount received from the sale of a portion of the company's business, for example a segment, division, branch or other business, during the period. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Investing Activities -URI http://asc.fasb.org/extlink&oid=6516133 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 12 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3179-108585 + Details
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