XML 97 R75.htm IDEA: XBRL DOCUMENT
v3.24.2.u1

Premises and Equipment - Additional Information (Details) | 12 Months Ended
--- | ---
Jun. 30, 2024 USD ($) property | Jun. 30, 2023 USD ($)
Number of leased properties | property | 11 |
Operating lease expense | $ 1,200,000 | $ 720,000
Income recognized from lessor agreements | $ 334,000 | $ 228,000
Minimum |  |
Lessee Expected Lease Terms | 18 months |
Operating Lease, Weighted Average Discount Rate, Percent | 5.00% |
Maximum |  |
Lessee Expected Lease Terms | P20Y |
Operating Lease, Weighted Average Discount Rate, Percent | 8.50% |

X
- Definition Represents the monetary amount of Income Recognized From Lessor Agreements, during the indicated time period. + References No definition available. + Details
Name: | smbc_IncomeRecognizedFromLessorAgreements
Namespace Prefix: | smbc_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Represents the description of Lessee Expected Lease Terms, during the indicated time period. + References No definition available. + Details
Name: | smbc_LesseeExpectedLeaseTerms
Namespace Prefix: | smbc_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Number of separate real estate development properties located on land subject to ground leases. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 842 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 3 -Subparagraph (a)(1) -Publisher FASB -URI https://asc.fasb.org/1943274/2147478964/842-20-50-3 + Details
Name: | us-gaap_NumberOfPropertiesSubjectToGroundLeases
Namespace Prefix: | us-gaap_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | instant

X
- Definition Amount of operating lease expense. Excludes sublease income. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 842 -SubTopic 20 -Name Accounting Standards Codification -Section 45 -Paragraph 4 -Subparagraph (b) -Publisher FASB -URI https://asc.fasb.org/1943274/2147479041/842-20-45-4 + Details
Name: | us-gaap_OperatingLeaseExpense
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Weighted average discount rate for operating lease calculated at point in time. + 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)(4) -Publisher FASB -URI https://asc.fasb.org/1943274/2147478964/842-20-50-4 + Details
Name: | us-gaap_OperatingLeaseWeightedAverageDiscountRatePercent
Namespace Prefix: | us-gaap_
Data Type: | dtr-types:percentItemType
Balance Type: | na
Period Type: | instant

X
- Details
Name: | srt_RangeAxis=srt_MinimumMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_RangeAxis=srt_MaximumMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |