XML 44 R32.htm IDEA: XBRL DOCUMENT
v2.4.0.8

Compensation Plans Non Stock-based Compensation (Details) (USD $) | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 30, 2013 | Jun. 30, 2012 | Jun. 30, 2013 | Jun. 30, 2012
Net Profits Plan [Member] |  |  |  |
General and administrative expense | $ 3,443,000 | $ 3,682,000 | $ 7,229,000 | $ 8,094,000
Exploration expense | 323,000 | 493,000 | 697,000 | 1,018,000
Total | 3,766,000 | 4,175,000 | 7,926,000 | 9,112,000
Cash Bonus Plan [Member] |  |  |  |
Cash Paid in Current Period for Bonus Compensation |  |  | 16,000,000 | 24,000,000
Accrued Cash Bonus Plan Expense | $ 5,300,000 | $ 4,600,000 | $ 10,900,000 | $ 9,300,000

X
- Definition Accrued cash bonus plan expense related to the specific performance for a period which has been included within the general and administrative expense and exploration line items in the statement of operations. + References No definition available. + Details
Name: | sm_AccruedCashBonusPlanExpense
Namespace Prefix: | sm_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Represents the amount of cash paid for bonuses during the period based on previous performance. + References No definition available. + Details
Name: | sm_CashPaidInCurrentPeriodForBonusCompensation
Namespace Prefix: | sm_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Amount expensed to general and administrative expense related to cash payments made or accrued under the profit sharing plan. + References No definition available. + Details
Name: | sm_CashPaymentsMadeOrAccruedUnderProfitSharingPlanAllocatedToGeneralAndAdministrativeExpense
Namespace Prefix: | sm_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Amount expensed to oil and gas exploration expense related to cash payments made or accrued under the profit sharing plan. + References No definition available. + Details
Name: | sm_CashPaymentsMadeOrAccruedUnderProfitSharingPlanAllocatedToOilAndGasExplorationExpense
Namespace Prefix: | sm_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Total amount expensed related to cash payments made or accrued under the profit sharing plan. + References No definition available. + Details
Name: | sm_TotalCashPaymentsMadeOrAccruedUnderProfitSharingPlan
Namespace Prefix: | sm_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration