XML 72 R47.htm IDEA: XBRL DOCUMENT
v3.22.0.1

Credit Agreement (Details) - USD ($) $ in Thousands | 12 Months Ended |  |
--- | --- | --- | ---
Dec. 31, 2021 | Feb. 10, 2022 | Dec. 31, 2020
Line of Credit Facility [Line Items] |  |  |
Revolving credit facility | $ 0 |  | $ 93,000
Borrowing Base Utilization of 25 Percent [Member] | Line of Credit [Member] |  |  |
Line of Credit Facility [Line Items] |  |  |
Line of credit agreement, unused capacity, commitment fee rate | 0.375% |  |
Borrowing Base Utilization of 25 Percent [Member] | Line of Credit [Member] | Eurodollar [Member] |  |  |
Line of Credit Facility [Line Items] |  |  |
Line of credit agreement, basis spread on variable rate | 1.75% |  |
Borrowing Base Utilization of 25 Percent [Member] | Line of Credit [Member] | Debt Instrument Variable Rate, Alternative Base Rate, And Swingline Loans [Member] |  |  |
Line of Credit Facility [Line Items] |  |  |
Line of credit agreement, basis spread on variable rate | 0.75% |  |
Borrowing Base Utilization Of 25 Percent Or More But Less Than 50 Percent [Member] | Line of Credit [Member] |  |  |
Line of Credit Facility [Line Items] |  |  |
Line of credit agreement, unused capacity, commitment fee rate | 0.375% |  |
Borrowing Base Utilization Of 25 Percent Or More But Less Than 50 Percent [Member] | Line of Credit [Member] | Eurodollar [Member] |  |  |
Line of Credit Facility [Line Items] |  |  |
Line of credit agreement, basis spread on variable rate | 2.00% |  |
Borrowing Base Utilization Of 25 Percent Or More But Less Than 50 Percent [Member] | Line of Credit [Member] | Debt Instrument Variable Rate, Alternative Base Rate, And Swingline Loans [Member] |  |  |
Line of Credit Facility [Line Items] |  |  |
Line of credit agreement, basis spread on variable rate | 1.00% |  |
Borrowing Base Utilization Of 50 Percent Or More But Less Than 75 Percent [Member] | Line of Credit [Member] |  |  |
Line of Credit Facility [Line Items] |  |  |
Line of credit agreement, unused capacity, commitment fee rate | 0.50% |  |
Borrowing Base Utilization Of 50 Percent Or More But Less Than 75 Percent [Member] | Line of Credit [Member] | Eurodollar [Member] |  |  |
Line of Credit Facility [Line Items] |  |  |
Line of credit agreement, basis spread on variable rate | 2.50% |  |
Borrowing Base Utilization Of 50 Percent Or More But Less Than 75 Percent [Member] | Line of Credit [Member] | Debt Instrument Variable Rate, Alternative Base Rate, And Swingline Loans [Member] |  |  |
Line of Credit Facility [Line Items] |  |  |
Line of credit agreement, basis spread on variable rate | 1.50% |  |
Borrowing Base Utilization Of 75 Percent Or More But Less Than 90 Percent [Member] | Line of Credit [Member] |  |  |
Line of Credit Facility [Line Items] |  |  |
Line of credit agreement, unused capacity, commitment fee rate | 0.50% |  |
Borrowing Base Utilization Of 75 Percent Or More But Less Than 90 Percent [Member] | Line of Credit [Member] | Eurodollar [Member] |  |  |
Line of Credit Facility [Line Items] |  |  |
Line of credit agreement, basis spread on variable rate | 2.75% |  |
Borrowing Base Utilization Of 75 Percent Or More But Less Than 90 Percent [Member] | Line of Credit [Member] | Debt Instrument Variable Rate, Alternative Base Rate, And Swingline Loans [Member] |  |  |
Line of Credit Facility [Line Items] |  |  |
Line of credit agreement, basis spread on variable rate | 1.75% |  |
Borrowing Base Utilization Of 90 Percent Or More [Member] | Line of Credit [Member] |  |  |
Line of Credit Facility [Line Items] |  |  |
Line of credit agreement, unused capacity, commitment fee rate | 0.50% |  |
Borrowing Base Utilization Of 90 Percent Or More [Member] | Line of Credit [Member] | Eurodollar [Member] |  |  |
Line of Credit Facility [Line Items] |  |  |
Line of credit agreement, basis spread on variable rate | 3.00% |  |
Borrowing Base Utilization Of 90 Percent Or More [Member] | Line of Credit [Member] | Debt Instrument Variable Rate, Alternative Base Rate, And Swingline Loans [Member] |  |  |
Line of Credit Facility [Line Items] |  |  |
Line of credit agreement, basis spread on variable rate | 2.00% |  |
Revolving Credit Facility [Member] |  |  |
Line of Credit Facility [Line Items] |  |  |
Revolving credit facility | $ 0 |  | 93,000
Line of credit agreement, maximum loan amount | 2,500,000 |  |
Line of credit agreement, current borrowing base | 1,100,000 |  |
Line of credit agreement, aggregate lender commitment amount | 1,100,000 |  | 1,100,000
Letters of credit | 2,500 |  | 42,000
Available borrowing capacity | 1,097,500 |  | 965,000
Credit facility, unamortized deferred financing costs | $ 2,700 |  | $ 4,300
Revolving Credit Facility [Member] | Subsequent Event |  |  |
Line of Credit Facility [Line Items] |  |  |
Revolving credit facility |  | $ 0 |
Line of credit agreement, aggregate lender commitment amount |  | 1,100,000 |
Letters of credit |  | 2,500 |
Available borrowing capacity |  | $ 1,097,500 |

X
- Definition Line of Credit Facility, Aggregate Lender Commitments + References No definition available. + Details
Name: | sm_LineofCreditFacilityAggregateLenderCommitments
Namespace Prefix: | sm_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Percentage points added to the reference rate to compute the variable rate on the debt instrument. + References No definition available. + Details
Name: | us-gaap_DebtInstrumentBasisSpreadOnVariableRate1
Namespace Prefix: | us-gaap_
Data Type: | dtr-types:percentItemType
Balance Type: | na
Period Type: | duration

X
- Definition The total amount of the contingent obligation under letters of credit outstanding as of the reporting date. + References No definition available. + Details
Name: | us-gaap_LettersOfCreditOutstandingAmount
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

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://fasb.org/us-gaap/role/ref/legacyRef -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=120391452&loc=d3e13212-122682 + Details
Name: | us-gaap_LineOfCreditFacilityCurrentBorrowingCapacity
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References No definition available. + Details
Name: | us-gaap_LineOfCreditFacilityLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

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://fasb.org/us-gaap/role/ref/legacyRef -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=120391452&loc=d3e13212-122682 + Details
Name: | us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Amount of borrowing capacity currently available under the credit facility (current borrowing capacity less the amount of borrowings outstanding). + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -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=120391452&loc=d3e13212-122682 + Details
Name: | us-gaap_LineOfCreditFacilityRemainingBorrowingCapacity
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition The fee, expressed as a percentage of the line of credit facility, for available but unused credit capacity under the credit facility. + References No definition available. + Details
Name: | us-gaap_LineOfCreditFacilityUnusedCapacityCommitmentFeePercentage
Namespace Prefix: | us-gaap_
Data Type: | dtr-types:percentItemType
Balance Type: | na
Period Type: | duration

X
- Definition The carrying value as of the balance sheet date of the noncurrent portion of long-term obligations drawn from a line of credit, which is a bank's commitment to make loans up to a specific amount. Examples of items that might be included in the application of this element may consist of letters of credit, standby letters of credit, and revolving credit arrangements, under which borrowings can be made up to a maximum amount as of any point in time conditional on satisfaction of specified terms before, as of and after the date of drawdowns on the line. Includes short-term obligations that would normally be classified as current liabilities but for which (a) postbalance sheet date issuance of a long term obligation to refinance the short term obligation on a long term basis, or (b) the enterprise has entered into a financing agreement that clearly permits the enterprise to refinance the short-term obligation on a long term basis and the following conditions are met (1) the agreement does not expire within 1 year and is not cancelable by the lender except for violation of an objectively determinable provision, (2) no violation exists at the BS date, and (3) the lender has entered into the financing agreement is expected to be financially capable of honoring the agreement. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.22) -URI http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 470 -SubTopic 10 -Section 45 -Paragraph 14 -URI http://asc.fasb.org/extlink&oid=99376301&loc=d3e1336-112600 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 470 -SubTopic 10 -Section 45 -Paragraph 13 -URI http://asc.fasb.org/extlink&oid=99376301&loc=d3e1314-112600 + Details
Name: | us-gaap_LongTermLineOfCredit
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition The remaining balance of debt issuance expenses that were capitalized and are being amortized against income over the lives of the respective bond issues. This does not include the amounts capitalized as part of the cost of the utility plant or asset. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.17) -URI http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682 + Details
Name: | us-gaap_UnamortizedDebtIssuanceExpense
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Details
Name: | sm_DebtInstrumentBorrowingBaseUtilizationPercentageAxis=sm_BorrowingBaseUtilizationOfLessThan25PercentMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_LongtermDebtTypeAxis=us-gaap_LineOfCreditMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_VariableRateAxis=us-gaap_EurodollarMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_VariableRateAxis=us-gaap_PrimeRateMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | sm_DebtInstrumentBorrowingBaseUtilizationPercentageAxis=sm_BorrowingBaseUtilizationOf25PercentOrMoreButLessThan50PercentMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | sm_DebtInstrumentBorrowingBaseUtilizationPercentageAxis=sm_BorrowingBaseUtilizationOf50PercentOrMoreButLessThan75PercentMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | sm_DebtInstrumentBorrowingBaseUtilizationPercentageAxis=sm_BorrowingBaseUtilizationOf75PercentOrMoreButLessThan90PercentMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | sm_DebtInstrumentBorrowingBaseUtilizationPercentageAxis=sm_BorrowingBaseUtilizationOf90PercentOrMoreMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_CreditFacilityAxis=us-gaap_RevolvingCreditFacilityMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_SubsequentEventTypeAxis=us-gaap_SubsequentEventMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |