XML 135 R106.htm IDEA: XBRL DOCUMENT
v2.4.0.8

Derivative Instruments and Risk Management - Summary of Commodity Swaps (Parenthetical) (Detail) | Dec. 31, 2013 T | Dec. 31, 2012 T
--- | --- | ---
Derivative Instruments And Hedging Activities Disclosure [Abstract] |  |
Commodity swaps, notional quantity | 0 | 275

X
- 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
Name: | invest_DerivativeNonmonetaryNotionalAmount
Namespace Prefix: | invest_
Data Type: | xbrli:decimalItemType
Balance Type: | na
Period Type: | instant

X
- Details
Name: | us-gaap_DerivativeInstrumentsAndHedgingActivitiesDisclosureAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration