XML 55 R72.htm IDEA: XBRL DOCUMENT
v2.4.0.6

Derivatives - Fair Value of Derivative Contracts (Detail) (USD $) In Thousands, unless otherwise specified | Mar. 31, 2013 | Dec. 31, 2012
--- | --- | ---
Derivatives, Fair Value [Line Items] |  |
Derivative assets | $ 90,707 | $ 130,403
Derivative liabilities | (93,149) | (110,411)
Total net derivative contracts | (2,442) | 19,992
Current assets |  |
Derivatives, Fair Value [Line Items] |  |
Derivative assets | 45,339 | 91,346
Current assets | Oil Price Swaps |  |
Derivatives, Fair Value [Line Items] |  |
Derivative assets | 44,306 | 88,052
Current assets | Oil Basis Swaps |  |
Derivatives, Fair Value [Line Items] |  |
Derivative assets | 122 | 183
Current assets | Oil Collars - Three Way |  |
Derivatives, Fair Value [Line Items] |  |
Derivative assets | 311 | 0
Current assets | Natural Gas Collars |  |
Derivatives, Fair Value [Line Items] |  |
Derivative assets | 600 | 3,111
Noncurrent assets |  |
Derivatives, Fair Value [Line Items] |  |
Derivative assets | 45,368 | 39,057
Noncurrent assets | Oil Price Swaps |  |
Derivatives, Fair Value [Line Items] |  |
Derivative assets | 32,710 | 37,983
Noncurrent assets | Oil Collars - Three Way |  |
Derivatives, Fair Value [Line Items] |  |
Derivative assets | 12,019 | 190
Noncurrent assets | Natural Gas Collars |  |
Derivatives, Fair Value [Line Items] |  |
Derivative assets | 639 | 884
Current liabilities |  |
Derivatives, Fair Value [Line Items] |  |
Derivative liabilities | (32,616) | (35,184)
Current liabilities | Oil Price Swaps |  |
Derivatives, Fair Value [Line Items] |  |
Derivative liabilities | (29,161) | (31,991)
Current liabilities | Natural Gas Price Swap |  |
Derivatives, Fair Value [Line Items] |  |
Derivative liabilities | (2,985) | 0
Current liabilities | Oil Basis Swaps |  |
Derivatives, Fair Value [Line Items] |  |
Derivative liabilities | (333) | (695)
Current liabilities | Oil Collars - Two Way |  |
Derivatives, Fair Value [Line Items] |  |
Derivative liabilities | (137) | (103)
Current liabilities | Interest rate swap |  |
Derivatives, Fair Value [Line Items] |  |
Derivative liabilities | 0 | (2,395)
Noncurrent liabilities |  |
Derivatives, Fair Value [Line Items] |  |
Derivative liabilities | (60,533) | (75,227)
Noncurrent liabilities | Oil Price Swaps |  |
Derivatives, Fair Value [Line Items] |  |
Derivative liabilities | (60,533) | (67,900)
Noncurrent liabilities | Oil Collars - Three Way |  |
Derivatives, Fair Value [Line Items] |  |
Derivative liabilities | $ 0 | $ (7,327)

X
- Definition Fair value of derivative asset, presented on a gross basis even when the derivative instrument is subject to master netting arrangements and qualifies for net presentation in the statement of financial position. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 133 -Paragraph 205G -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 133 -Paragraph 44C -Subparagraph a -Clause 1 -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 4B -Subparagraph (a),(c) -URI http://asc.fasb.org/extlink&oid=7476318&loc=SL5624163-113959 + Details
Name: | us-gaap_DerivativeFairValueOfDerivativeAsset
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Fair value of derivative liability, presented on a gross basis even when the derivative instrument is subject to master netting arrangements and qualifies for net presentation in the statement of financial position. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 133 -Paragraph 205G -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 133 -Paragraph 44C -Subparagraph a -Clause 1 -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 4B -Subparagraph (a),(c) -URI http://asc.fasb.org/extlink&oid=7476318&loc=SL5624163-113959 + Details
Name: | us-gaap_DerivativeFairValueOfDerivativeLiability
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Fair value of the assets less the liabilities of a derivative or group of derivatives. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 45 -Paragraph 6 -URI http://asc.fasb.org/extlink&oid=6945355&loc=d3e41271-113958 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 825 -SubTopic 10 -Section 50 -Paragraph 10 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=7491637&loc=d3e13433-108611 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 45 -Paragraph 5 -URI http://asc.fasb.org/extlink&oid=6945355&loc=d3e41228-113958 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 825 -SubTopic 10 -Section 50 -Paragraph 15 -URI http://asc.fasb.org/extlink&oid=7491637&loc=d3e13495-108611 + Details
Name: | us-gaap_DerivativeFairValueOfDerivativeNet
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

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