XML 75 R64.htm IDEA: XBRL DOCUMENT
v3.24.3

Premises and Equipment - ROU Assets and Lease liabilities (Details) - USD ($) $ in Thousands | 3 Months Ended |
--- | --- | ---
Sep. 30, 2024 | Sep. 30, 2023 | Jun. 30, 2024
Operating leases right of use asset | $ 7,048 |  | $ 6,669
ROU assets obtained in exchange for operating lease obligations: |  | $ 2,333 |
Consolidated Balance Sheet [Member] |  |  |
Operating leases right of use asset | 7,048 |  | $ 6,669
Consolidated Statement Of Income [Member] |  |  |
Operating lease costs classified as occupancy and equipment expense (includes short-term lease costs) | $ 298 | 280 |
Cash Paid For Amounts Included In The Measurement Of Lease Liabilities [Member] | Supplemental Disclosures Of Cash Flow Information [Member] |  |  |
ROU assets obtained in exchange for operating lease obligations: |  | $ 2,445 |

X
- Definition Represents the monetary amount of Operating Lease Costs Classified as Occupancy and Equipment Expense, during the indicated time period. + References No definition available. + Details
Name: | smbc_OperatingLeaseCostsClassifiedAsOccupancyAndEquipmentExpense
Namespace Prefix: | smbc_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Amount of lessee's right to use underlying asset under operating lease. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 842 -SubTopic 20 -Name Accounting Standards Codification -Section 45 -Paragraph 1 -Subparagraph (a) -Publisher FASB -URI https://asc.fasb.org/1943274/2147479041/842-20-45-1 + Details
Name: | us-gaap_OperatingLeaseRightOfUseAsset
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Amount of increase in right-of-use asset obtained in exchange for operating lease liability. + References Reference 1: http://www.xbrl.org/2003/role/exampleRef -Topic 842 -SubTopic 20 -Name Accounting Standards Codification -Section 55 -Paragraph 53 -Publisher FASB -URI https://asc.fasb.org/1943274/2147479589/842-20-55-53 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Topic 842 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 4 -Subparagraph (g)(2) -Publisher FASB -URI https://asc.fasb.org/1943274/2147478964/842-20-50-4 + Details
Name: | us-gaap_RightOfUseAssetObtainedInExchangeForOperatingLeaseLiability
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Details
Name: | srt_ConsolidatedEntitiesAxis=smbc_ConsolidatedBalanceSheetMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_ConsolidatedEntitiesAxis=smbc_ConsolidatedStatementOfIncomeMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FairValueByAssetClassAxis=smbc_CashPaidForAmountsIncludedInMeasurementOfLeaseLiabilitiesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_ConsolidatedEntitiesAxis=smbc_SupplementalDisclosuresOfCashFlowInformationMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |