XML 28 R31.htm IDEA: XBRL DOCUMENT
v2.4.0.8

Long-Term Debt (Details) (USD $) |  |  | 9 Months Ended |  |  |  |
--- | --- | --- | --- | --- | --- | --- | ---
Sep. 30, 2014 | Dec. 31, 2013 | Sep. 30, 2014 Line of Credit [Member] | Sep. 30, 2014 5.0% Senior Notes Due 2024 [Member] | Sep. 30, 2014 Senior Notes [Member] | Dec. 31, 2013 Senior Notes [Member] | May 20, 2013 Senior Notes [Member] | Oct. 06, 2014 Subsequent Event [Member] Line of Credit [Member]
Debt Instrument [Line Items] |  |  |  |  |  |  |  |
Line of Credit Facility, Maximum Borrowing Capacity |  |  | $ 2,500,000,000 |  |  |  |  |
Line of Credit Facility, Current Borrowing Capacity |  |  | 1,300,000,000 |  |  |  |  |
Borrowing Base, Line of Credit |  |  | 2,200,000,000 |  |  |  |  | 2,400,000,000
Percentage of Proved Oil and Gas Properties Secured for Credit Facility Borrowing |  |  | 75.00% |  |  |  |  |
Line of Credit, Covenant Compliance, Maximum Annual Dividend Payment |  |  | 50,000,000 |  |  |  |  |
Debt Instrument, Covenant Compliance, Dividends Excluded From Computation |  |  |  | 6,500,000 |  |  |  |
6.625% Senior Notes, Due 2019 |  |  |  |  | 350,000,000 | 350,000,000 |  |
6.50% Senior Notes, Due 2021 |  |  |  |  | 350,000,000 | 350,000,000 |  |
6.50% Senior Notes, Due 2023 |  |  |  |  | 400,000,000 | 400,000,000 |  |
5% Senior Notes, Due 2024 |  |  |  |  | 500,000,000 | 500,000,000 | 500,000,000 |
Senior Notes | $ 1,600,000,000 | $ 1,600,000,000 |  |  | $ 1,600,000,000 | $ 1,600,000,000 |  |

X
- Definition 5% Senior Notes, Due 2024 + References No definition available. + Details
Name: | sm_A5SeniorNotesDue2024FaceValue
Namespace Prefix: | sm_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Carrying value as of the balance sheet date of 6.50% Notes due 2021 with the highest claim on the assets of the issuer in case of bankruptcy or liquidation (with maturities initially due after one year or beyond the operating cycle if longer), excluding current portion. Senior note holders are paid off in full before any payments are made to junior note holders. + References No definition available. + Details
Name: | sm_A6.50SeniorNotesDue2021FaceValue
Namespace Prefix: | sm_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Carrying value as of the balance sheet date of 6.50% Notes due 2021 with the highest claim on the assets of the issuer in case of bankruptcy or liquidation (with maturities initially due after one year or beyond the operating cycle if longer), excluding current portion. Senior note holders are paid off in full before any payments are made to junior note holders. + References No definition available. + Details
Name: | sm_A6.50SeniorNotesDue2023FaceValue
Namespace Prefix: | sm_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Carrying value as of the balance sheet date of 6.625% Notes with the highest claim on the assets of the issuer in case of bankruptcy or liquidation (with maturities initially due after one year or beyond the operating cycle if longer), excluding current portion. Senior note holders are paid off in full before any payments are made to junior note holders. + References No definition available. + Details
Name: | sm_A6.625SeniorNotesDue2019FaceValue
Namespace Prefix: | sm_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Value of assets pledged as collateral under line of credit agreement, net of certain company liabilities + References No definition available. + Details
Name: | sm_BorrowingBaseLineOfCredit
Namespace Prefix: | sm_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Represents the amount of dividend payments excluded from the resticted dividend calculation covenant. + References No definition available. + Details
Name: | sm_DebtInstrumentCovenantComplianceDividendsExcludedFromComputation
Namespace Prefix: | sm_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Represents the maximum amount of dividend distributions, which are available per year as per the covenants under the line of credit facility. + References No definition available. + Details
Name: | sm_LineOfCreditCovenantComplianceMaximumAnnualDividendPayment
Namespace Prefix: | sm_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Percentage of Proved Oil and Gas Properties Secured for Credit Facility Borrowing + References No definition available. + Details
Name: | sm_PercentageofProvedOilandGasPropertiesSecuredforCreditFacilityBorrowing
Namespace Prefix: | sm_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration

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

X
- Definition Amount of current borrowing capacity under the credit facility considering any current restrictions on the amount that could be borrowed (for example, borrowings may be limited by the amount of current assets), but without considering any amounts currently outstanding under the facility. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.19(b),22(b)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 19, 22 -Article 5 + Details
Name: | us-gaap_LineOfCreditFacilityCurrentBorrowingCapacity
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Maximum borrowing capacity under the credit facility without consideration of any current restrictions on the amount that could be borrowed or the amounts currently outstanding under the facility. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.19(b),22(b)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 19, 22 -Article 5 + Details
Name: | us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Including the current and noncurrent portions, carrying value as of the balance sheet date of Notes with the highest claim on the assets of the issuer in case of bankruptcy or liquidation (with maturities initially due after one year or beyond the operating cycle if longer). Senior note holders are paid off in full before any payments are made to junior note holders. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-03.16) -URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-03.16(a)) -URI http://asc.fasb.org/extlink&oid=6879938&loc=d3e572229-122910 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 03 -Paragraph 16 -Article 9 + Details
Name: | us-gaap_SeniorNotes
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant