XML 91 R75.htm IDEA: XBRL DOCUMENT
v3.25.2

Loans and Allowance for Credit Losses - Collateral dependent loans and related ACL (Details) - USD ($) $ in Thousands | Jun. 30, 2025 | Jun. 30, 2024 | Jun. 30, 2023 | Jun. 30, 2022
--- | --- | --- | --- | ---
Financing Receivable, Past Due [Line Items] |  |  |  |
Total Loans Receivable | $ 4,100,768 | $ 3,850,035 |  |
Related allowance for credit losses | 51,629 | 52,516 | $ 47,820 | $ 33,192
Commercial and industrial |  |  |  |
Financing Receivable, Past Due [Line Items] |  |  |  |
Total Loans Receivable | 510,259 | 450,147 |  |
Related allowance for credit losses | 6,952 | 6,233 | 5,235 | 3,597
Agriculture production |  |  |  |
Financing Receivable, Past Due [Line Items] |  |  |  |
Total Loans Receivable | 206,128 | 175,968 |  |
Related allowance for credit losses | 3,374 | 835 | 782 | 799
Consumer |  |  |  |
Financing Receivable, Past Due [Line Items] |  |  |  |
Total Loans Receivable | 55,387 | 59,671 |  |
Related allowance for credit losses | 952 | 578 | 490 | 402
All other loans |  |  |  |
Financing Receivable, Past Due [Line Items] |  |  |  |
Total Loans Receivable | 5,102 | 3,981 |  |
Related allowance for credit losses | 4 | 17 | $ 21 | $ 14
Real Estate |  |  |  |
Financing Receivable, Past Due [Line Items] |  |  |  |
Total Loans Receivable | 41,259 | 24,254 |  |
Real Estate | 1-4 residential real estate |  |  |  |
Financing Receivable, Past Due [Line Items] |  |  |  |
Total Loans Receivable | 752 | 797 |  |
Real Estate | Commercial Real Estate | Non-owner occupied |  |  |  |
Financing Receivable, Past Due [Line Items] |  |  |  |
Total Loans Receivable | 31,764 | 23,457 |  |
Real Estate | Commercial Real Estate | Owner occupied |  |  |  |
Financing Receivable, Past Due [Line Items] |  |  |  |
Total Loans Receivable | 811 |  |  |
Real Estate | Construction and land development |  |  |  |
Financing Receivable, Past Due [Line Items] |  |  |  |
Total Loans Receivable | 5,743 |  |  |
Real Estate | Commercial and industrial |  |  |  |
Financing Receivable, Past Due [Line Items] |  |  |  |
Total Loans Receivable | 494 |  |  |
Land |  |  |  |
Financing Receivable, Past Due [Line Items] |  |  |  |
Total Loans Receivable | 661 |  |  |
Land | Construction and land development |  |  |  |
Financing Receivable, Past Due [Line Items] |  |  |  |
Total Loans Receivable | 661 |  |  |
Other |  |  |  |
Financing Receivable, Past Due [Line Items] |  |  |  |
Total Loans Receivable | 3,669 | 2,705 |  |
Other | Commercial Real Estate | Owner occupied |  |  |  |
Financing Receivable, Past Due [Line Items] |  |  |  |
Total Loans Receivable | 541 |  |  |
Other | Commercial and industrial |  |  |  |
Financing Receivable, Past Due [Line Items] |  |  |  |
Total Loans Receivable | 3,128 | 2,705 |  |
Collateral Pledged |  |  |  |
Financing Receivable, Past Due [Line Items] |  |  |  |
Total Loans Receivable | 45,589 | 26,959 |  |
Related allowance for credit losses | 8,153 | 10,926 |  |
Collateral Pledged | 1-4 residential real estate |  |  |  |
Financing Receivable, Past Due [Line Items] |  |  |  |
Total Loans Receivable | 752 | 797 |  |
Related allowance for credit losses | 117 | 116 |  |
Collateral Pledged | Commercial Real Estate | Non-owner occupied |  |  |  |
Financing Receivable, Past Due [Line Items] |  |  |  |
Total Loans Receivable | 31,764 | 23,457 |  |
Related allowance for credit losses | 6,456 | 10,175 |  |
Collateral Pledged | Commercial Real Estate | Owner occupied |  |  |  |
Financing Receivable, Past Due [Line Items] |  |  |  |
Total Loans Receivable | 1,352 |  |  |
Related allowance for credit losses | 290 |  |  |
Collateral Pledged | Construction and land development |  |  |  |
Financing Receivable, Past Due [Line Items] |  |  |  |
Total Loans Receivable | 6,404 |  |  |
Related allowance for credit losses | 161 |  |  |
Collateral Pledged | Commercial and industrial |  |  |  |
Financing Receivable, Past Due [Line Items] |  |  |  |
Total Loans Receivable | 3,622 | 2,705 |  |
Related allowance for credit losses | $ 1,129 | $ 635 |  |

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 excluding accrued interest, of allowance for credit loss on financing receivable. Excludes net investment in lease. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 326 -SubTopic 20 -Name Accounting Standards Codification -Section 45 -Paragraph 1 -Publisher FASB -URI https://asc.fasb.org/1943274/2147479344/326-20-45-1 + Details
Name: | us-gaap_FinancingReceivableAllowanceForCreditLossExcludingAccruedInterest
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 Reference 1: http://www.xbrl.org/2003/role/exampleRef -Topic 326 -SubTopic 20 -Name Accounting Standards Codification -Section 55 -Paragraph 12 -Subparagraph (a)(3) -Publisher FASB -URI https://asc.fasb.org/1943274/2147479294/326-20-55-12 Reference 2: http://www.xbrl.org/2003/role/exampleRef -Topic 326 -SubTopic 20 -Name Accounting Standards Codification -Section 55 -Paragraph 12 -Subparagraph (a)(2) -Publisher FASB -URI https://asc.fasb.org/1943274/2147479294/326-20-55-12 Reference 3: http://www.xbrl.org/2003/role/exampleRef -Topic 326 -SubTopic 20 -Name Accounting Standards Codification -Section 55 -Paragraph 12 -Subparagraph (a)(1) -Publisher FASB -URI https://asc.fasb.org/1943274/2147479294/326-20-55-12 Reference 4: http://www.xbrl.org/2003/role/exampleRef -Topic 326 -SubTopic 20 -Name Accounting Standards Codification -Section 55 -Paragraph 12 -Subparagraph (d)(4) -Publisher FASB -URI https://asc.fasb.org/1943274/2147479294/326-20-55-12 Reference 5: http://www.xbrl.org/2003/role/exampleRef -Topic 326 -SubTopic 20 -Name Accounting Standards Codification -Section 55 -Paragraph 12 -Subparagraph (d)(3) -Publisher FASB -URI https://asc.fasb.org/1943274/2147479294/326-20-55-12 Reference 6: http://www.xbrl.org/2003/role/exampleRef -Topic 326 -SubTopic 20 -Name Accounting Standards Codification -Section 55 -Paragraph 12 -Subparagraph (d)(2) -Publisher FASB -URI https://asc.fasb.org/1943274/2147479294/326-20-55-12 Reference 7: http://www.xbrl.org/2003/role/exampleRef -Topic 326 -SubTopic 20 -Name Accounting Standards Codification -Section 55 -Paragraph 12 -Subparagraph (d)(1) -Publisher FASB -URI https://asc.fasb.org/1943274/2147479294/326-20-55-12 Reference 8: http://www.xbrl.org/2003/role/exampleRef -Topic 326 -SubTopic 20 -Name Accounting Standards Codification -Section 55 -Paragraph 12 -Subparagraph (b)(2) -Publisher FASB -URI https://asc.fasb.org/1943274/2147479294/326-20-55-12 Reference 9: http://www.xbrl.org/2003/role/exampleRef -Topic 326 -SubTopic 20 -Name Accounting Standards Codification -Section 55 -Paragraph 12 -Subparagraph (c)(2) -Publisher FASB -URI https://asc.fasb.org/1943274/2147479294/326-20-55-12 Reference 10: http://www.xbrl.org/2003/role/exampleRef -Topic 326 -SubTopic 20 -Name Accounting Standards Codification -Section 55 -Paragraph 12 -Subparagraph (c)(1) -Publisher FASB -URI https://asc.fasb.org/1943274/2147479294/326-20-55-12 Reference 11: 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 12: http://www.xbrl.org/2003/role/exampleRef -Topic 326 -SubTopic 20 -Name Accounting Standards Codification -Section 55 -Paragraph 12 -Subparagraph (e)(2) -Publisher FASB -URI https://asc.fasb.org/1943274/2147479294/326-20-55-12 Reference 13: http://www.xbrl.org/2003/role/exampleRef -Topic 326 -SubTopic 20 -Name Accounting Standards Codification -Section 55 -Paragraph 12 -Subparagraph (e)(1) -Publisher FASB -URI https://asc.fasb.org/1943274/2147479294/326-20-55-12 Reference 14: http://www.xbrl.org/2003/role/exampleRef -Topic 326 -SubTopic 20 -Name Accounting Standards Codification -Section 55 -Paragraph 12 -Subparagraph (b)(4) -Publisher FASB -URI https://asc.fasb.org/1943274/2147479294/326-20-55-12 Reference 15: http://www.xbrl.org/2003/role/exampleRef -Topic 326 -SubTopic 20 -Name Accounting Standards Codification -Section 55 -Paragraph 12 -Subparagraph (b)(3) -Publisher FASB -URI https://asc.fasb.org/1943274/2147479294/326-20-55-12 Reference 16: http://www.xbrl.org/2003/role/exampleRef -Topic 326 -SubTopic 20 -Name Accounting Standards Codification -Section 55 -Paragraph 12 -Subparagraph (b)(1) -Publisher FASB -URI https://asc.fasb.org/1943274/2147479294/326-20-55-12 Reference 17: 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_FinancingReceivablePortfolioSegmentAxis=smbc_CommercialAndIndustrialPortfolioMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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

X
- Details
Name: | us-gaap_CollateralAxis=smbc_CommercialAndResidentialRealEstateMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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

X
- Details
Name: | us-gaap_ClassOfFinancingReceivableTypeOfBorrowerAxis=us-gaap_ConsumerBorrowerMember
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_CollateralAxis=us-gaap_LandMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_CollateralAxis=smbc_OtherCollateralizedAssetsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_CollateralAxis=us-gaap_CollateralPledgedMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |