XML 79 R65.htm IDEA: XBRL DOCUMENT
v3.23.2

Loans and Allowance for Credit Losses - Loan portfolio aging analysis (Details) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Jun. 30, 2023 | Jun. 30, 2022
Financing Receivable, Past Due [Line Items] |  |
Total Loans Receivable | $ 3,619,197 | $ 2,719,843
Greater than 90 Days Past Due and Accruing | 109 |
Current Loans, not past due |  |
Financing Receivable, Past Due [Line Items] |  |
Total Loans Receivable | 3,608,456 | 2,715,257
Total Past Due |  |
Financing Receivable, Past Due [Line Items] |  |
Total Loans Receivable | 10,741 | 4,586
30-59 Days Past Due |  |
Financing Receivable, Past Due [Line Items] |  |
Total Loans Receivable | 4,212 | 2,432
60 to 89 Days Past Due |  |
Financing Receivable, Past Due [Line Items] |  |
Total Loans Receivable | 2,767 | 732
Greater than 90 Days Past Due |  |
Financing Receivable, Past Due [Line Items] |  |
Total Loans Receivable | 3,762 | 1,422
Purchased credit-impaired loans | 0 | 0
Residential Real Estate |  |
Financing Receivable, Past Due [Line Items] |  |
Total Loans Receivable | 1,133,417 | 904,160
Greater than 90 Days Past Due and Accruing | 109 |
Residential Real Estate | Current Loans, not past due |  |
Financing Receivable, Past Due [Line Items] |  |
Total Loans Receivable | 1,130,549 | 901,694
Residential Real Estate | Total Past Due |  |
Financing Receivable, Past Due [Line Items] |  |
Total Loans Receivable | 2,868 | 2,466
Residential Real Estate | 30-59 Days Past Due |  |
Financing Receivable, Past Due [Line Items] |  |
Total Loans Receivable | 1,984 | 1,402
Residential Real Estate | 60 to 89 Days Past Due |  |
Financing Receivable, Past Due [Line Items] |  |
Total Loans Receivable | 401 |
Residential Real Estate | Greater than 90 Days Past Due |  |
Financing Receivable, Past Due [Line Items] |  |
Total Loans Receivable | 483 | 1,064
Construction Real Estate |  |
Financing Receivable, Past Due [Line Items] |  |
Total Loans Receivable | 190,856 | 134,416
Construction Real Estate | Current Loans, not past due |  |
Financing Receivable, Past Due [Line Items] |  |
Total Loans Receivable | 189,404 | 134,416
Construction Real Estate | Total Past Due |  |
Financing Receivable, Past Due [Line Items] |  |
Total Loans Receivable | 1,452 |
Construction Real Estate | 30-59 Days Past Due |  |
Financing Receivable, Past Due [Line Items] |  |
Total Loans Receivable | 443 |
Construction Real Estate | 60 to 89 Days Past Due |  |
Financing Receivable, Past Due [Line Items] |  |
Total Loans Receivable | 311 |
Construction Real Estate | Greater than 90 Days Past Due |  |
Financing Receivable, Past Due [Line Items] |  |
Total Loans Receivable | 698 |
Commercial Real Estate |  |
Financing Receivable, Past Due [Line Items] |  |
Total Loans Receivable | 1,562,379 | 1,146,673
Commercial Real Estate | Current Loans, not past due |  |
Financing Receivable, Past Due [Line Items] |  |
Total Loans Receivable | 1,558,329 | 1,145,354
Commercial Real Estate | Total Past Due |  |
Financing Receivable, Past Due [Line Items] |  |
Total Loans Receivable | 4,050 | 1,319
Commercial Real Estate | 30-59 Days Past Due |  |
Financing Receivable, Past Due [Line Items] |  |
Total Loans Receivable | 616 | 416
Commercial Real Estate | 60 to 89 Days Past Due |  |
Financing Receivable, Past Due [Line Items] |  |
Total Loans Receivable | 1,854 | 615
Commercial Real Estate | Greater than 90 Days Past Due |  |
Financing Receivable, Past Due [Line Items] |  |
Total Loans Receivable | 1,580 | 288
Consumer loans |  |
Financing Receivable, Past Due [Line Items] |  |
Total Loans Receivable | 133,515 | 92,996
Consumer loans | Current Loans, not past due |  |
Financing Receivable, Past Due [Line Items] |  |
Total Loans Receivable | 132,723 | 92,554
Consumer loans | Total Past Due |  |
Financing Receivable, Past Due [Line Items] |  |
Total Loans Receivable | 792 | 442
Consumer loans | 30-59 Days Past Due |  |
Financing Receivable, Past Due [Line Items] |  |
Total Loans Receivable | 456 | 340
Consumer loans | 60 to 89 Days Past Due |  |
Financing Receivable, Past Due [Line Items] |  |
Total Loans Receivable | 124 | 45
Consumer loans | Greater than 90 Days Past Due |  |
Financing Receivable, Past Due [Line Items] |  |
Total Loans Receivable | 212 | 57
Commercial loans |  |
Financing Receivable, Past Due [Line Items] |  |
Total Loans Receivable | 599,030 | 441,598
Commercial loans | Current Loans, not past due |  |
Financing Receivable, Past Due [Line Items] |  |
Total Loans Receivable | 597,451 | 441,239
Commercial loans | Total Past Due |  |
Financing Receivable, Past Due [Line Items] |  |
Total Loans Receivable | 1,579 | 359
Commercial loans | 30-59 Days Past Due |  |
Financing Receivable, Past Due [Line Items] |  |
Total Loans Receivable | 713 | 274
Commercial loans | 60 to 89 Days Past Due |  |
Financing Receivable, Past Due [Line Items] |  |
Total Loans Receivable | 77 | 72
Commercial loans | Greater than 90 Days Past Due |  |
Financing Receivable, Past Due [Line Items] |  |
Total Loans Receivable | $ 789 | $ 13

X
- Definition Amortized cost excluding accrued interest, before allowance for credit loss, fee, after loan in process, of financing receivable. Excludes net investment in leases. + References No definition available. + Details
Name: | smbc_FinancingReceivableExcludingAccruedInterestBeforeAllowanceForCreditLossFeeAfterLoanInProcess
Namespace Prefix: | smbc_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Amount at purchase price of financing receivable purchased with credit deterioration. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 326 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 19 -Subparagraph (a) -Publisher FASB -URI https://asc.fasb.org//1943274/2147479319/326-20-50-19 + Details
Name: | us-gaap_FinancingReceivablePurchasedWithCreditDeteriorationAmountAtPurchasePrice
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Amortized cost of financing receivable 90 days or more past due and still accruing. Excludes net investment in lease. + References Reference 1: http://www.xbrl.org/2003/role/exampleRef -Topic 326 -SubTopic 20 -Name Accounting Standards Codification -Section 55 -Paragraph 80 -Publisher FASB -URI https://asc.fasb.org//1943274/2147479294/326-20-55-80 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Topic 326 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 16 -Subparagraph (c) -Publisher FASB -URI https://asc.fasb.org//1943274/2147479319/326-20-50-16 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Name Accounting Standards Codification -Section 50 -Paragraph 7 -Subparagraph (b) -SubTopic 10 -Topic 310 -Publisher FASB -URI https://asc.fasb.org//1943274/2147481962/310-10-50-7 + Details
Name: | us-gaap_FinancingReceivableRecordedInvestment90DaysPastDueAndStillAccruing
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
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 Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 326 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 14 -Publisher FASB -URI https://asc.fasb.org//1943274/2147479319/326-20-50-14 Reference 2: http://www.xbrl.org/2003/role/exampleRef -Topic 326 -SubTopic 20 -Name Accounting Standards Codification -Section 55 -Paragraph 80 -Publisher FASB -URI https://asc.fasb.org//1943274/2147479294/326-20-55-80 + Details
Name: | us-gaap_FinancingReceivableRecordedInvestmentPastDueLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Details
Name: | us-gaap_FinancingReceivablesPeriodPastDueAxis=us-gaap_FinancialAssetNotPastDueMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FinancingReceivablesPeriodPastDueAxis=us-gaap_FinancialAssetPastDueMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FinancingReceivablesPeriodPastDueAxis=us-gaap_FinancingReceivables30To59DaysPastDueMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FinancingReceivablesPeriodPastDueAxis=us-gaap_FinancingReceivables60To89DaysPastDueMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FinancingReceivablesPeriodPastDueAxis=us-gaap_FinancingReceivablesEqualToGreaterThan90DaysPastDueMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FinancingReceivablePortfolioSegmentAxis=us-gaap_ResidentialPortfolioSegmentMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FinancingReceivablePortfolioSegmentAxis=smbc_ConstructionPortfolioSegmentMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FinancingReceivablePortfolioSegmentAxis=us-gaap_CommercialRealEstatePortfolioSegmentMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FinancingReceivablePortfolioSegmentAxis=us-gaap_ConsumerPortfolioSegmentMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FinancingReceivablePortfolioSegmentAxis=us-gaap_CommercialPortfolioSegmentMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |