XML 57 R47.htm IDEA: XBRL DOCUMENT
v3.23.3

Loans and Allowance for Credit Losses - Credit risk profile based on rating category and year of origination (Details) - USD ($) $ in Thousands | 3 Months Ended |
--- | --- | ---
Sep. 30, 2023 | Jun. 30, 2023
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Amount of loan relationships subject to annual credit analysis | $ 3,000 |
Loan relationships that are subject to independent annual review | 1,000 |
2024 / 2023 | 202,441 | $ 1,112,842
2023 / 2022 | 1,082,882 | 969,065
2022 / 2021 | 937,702 | 623,440
2021 / 2020 | 601,370 | 213,074
2020 / 2019 | 194,498 | 108,106
Prior | 267,156 | 195,293
Revolving loans | 413,912 | 397,377
Total | 3,699,961 | 3,619,197
Pass |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
2024 / 2023 | 195,421 | 1,089,767
2023 / 2022 | 1,052,958 | 934,545
2022 / 2021 | 904,958 | 619,444
2021 / 2020 | 597,393 | 208,612
2020 / 2019 | 190,050 | 107,260
Prior | 264,120 | 191,942
Revolving loans | 410,305 | 393,419
Total | 3,615,205 | 3,544,989
Watch |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
2024 / 2023 | 3,306 | 10,385
2023 / 2022 | 22,594 | 6,729
2022 / 2021 | 5,462 | 932
2021 / 2020 | 1,115 | 3,990
2020 / 2019 | 4,299 | 198
Prior | 320 | 144
Revolving loans | 2,247 | 2,554
Total | 39,343 | 24,932
Special Mention |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
2024 / 2023 |  | 2,940
2023 / 2022 | 2,940 |
Total | 2,940 | 2,940
Substandard |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
2024 / 2023 | 3,714 | 9,750
2023 / 2022 | 4,390 | 27,791
2022 / 2021 | 27,282 | 3,064
2021 / 2020 | 2,862 | 472
2020 / 2019 | 149 | 648
Prior | 2,716 | 3,207
Revolving loans | 1,360 | 1,404
Total | 42,473 | 46,336
Residential Real Estate |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
2024 / 2023 | 55,180 | 330,193
2023 / 2022 | 319,421 | 314,305
2022 / 2021 | 302,660 | 253,203
2021 / 2020 | 243,008 | 103,843
2020 / 2019 | 93,864 | 25,849
Prior | 110,334 | 96,919
Revolving loans | 10,137 | 9,105
Total | 1,134,604 | 1,133,417
Residential Real Estate | Pass |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
2024 / 2023 | 54,368 | 328,142
2023 / 2022 | 318,276 | 312,853
2022 / 2021 | 301,722 | 252,077
2021 / 2020 | 242,029 | 103,735
2020 / 2019 | 93,759 | 25,651
Prior | 109,337 | 96,035
Revolving loans | 10,132 | 9,100
Total | 1,129,623 | 1,127,593
Residential Real Estate | Watch |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
2024 / 2023 | 812 | 1,214
2023 / 2022 | 249 | 1,136
2022 / 2021 | 567 | 616
2021 / 2020 | 610 | 108
2020 / 2019 | 105 | 198
Prior | 221 | 27
Revolving loans | 5 | 5
Total | 2,569 | 3,304
Residential Real Estate | Substandard |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
2024 / 2023 |  | 837
2023 / 2022 | 896 | 316
2022 / 2021 | 371 | 510
2021 / 2020 | 369 |
Prior | 776 | 857
Total | 2,412 | 2,520
Construction Real Estate |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
2024 / 2023 | 22,474 | 125,089
2023 / 2022 | 156,590 | 50,690
2022 / 2021 | 40,637 | 10,946
2021 / 2020 | 12,247 | 3,190
Revolving loans | 944 | 941
Total | 232,892 | 190,856
Construction Real Estate | Pass |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
2024 / 2023 | 22,474 | 124,479
2023 / 2022 | 156,274 | 50,011
2022 / 2021 | 40,269 | 10,946
2021 / 2020 | 12,247 | 3,190
Revolving loans | 944 | 941
Total | 232,208 | 189,567
Construction Real Estate | Watch |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
2024 / 2023 |  | 280
2023 / 2022 | 316 |
Total | 316 | 280
Construction Real Estate | Substandard |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
2024 / 2023 |  | 330
2023 / 2022 |  | 679
2022 / 2021 | 368 |
Total | 368 | 1,009
Commercial Real Estate |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
2024 / 2023 | 68,086 | 481,395
2023 / 2022 | 443,622 | 505,987
2022 / 2021 | 508,556 | 282,509
2021 / 2020 | 274,892 | 93,439
2020 / 2019 | 89,255 | 75,126
Prior | 139,036 | 85,723
Revolving loans | 40,700 | 38,200
Total | 1,564,147 | 1,562,379
Commercial Real Estate | Pass |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
2024 / 2023 | 63,507 | 462,643
2023 / 2022 | 416,287 | 474,140
2022 / 2021 | 477,861 | 279,921
2021 / 2020 | 272,320 | 89,272
2020 / 2019 | 85,115 | 74,653
Prior | 137,865 | 83,871
Revolving loans | 39,712 | 37,443
Total | 1,492,667 | 1,501,943
Commercial Real Estate | Watch |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
2024 / 2023 | 1,267 | 8,122
2023 / 2022 | 21,434 | 5,382
2022 / 2021 | 4,558 | 163
2021 / 2020 | 160 | 3,879
2020 / 2019 | 4,139 |
Prior | 79 | 117
Revolving loans | 20 |
Total | 31,657 | 17,663
Commercial Real Estate | Special Mention |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
2024 / 2023 |  | 2,940
2023 / 2022 | 2,940 |
Total | 2,940 | 2,940
Commercial Real Estate | Substandard |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
2024 / 2023 | 3,312 | 7,690
2023 / 2022 | 2,961 | 26,465
2022 / 2021 | 26,137 | 2,425
2021 / 2020 | 2,412 | 288
2020 / 2019 | 1 | 473
Prior | 1,092 | 1,735
Revolving loans | 968 | 757
Total | 36,883 | 39,833
Consumer loans |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
2024 / 2023 | 10,134 | 36,107
2023 / 2022 | 30,225 | 14,532
2022 / 2021 | 11,264 | 5,509
2021 / 2020 | 4,711 | 1,692
2020 / 2019 | 1,403 | 717
Prior | 1,921 | 1,420
Revolving loans | 75,605 | 73,538
Total | 135,263 | 133,515
Consumer loans | Pass |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
2024 / 2023 | 10,134 | 36,003
2023 / 2022 | 30,197 | 14,530
2022 / 2021 | 11,214 | 5,446
2021 / 2020 | 4,640 | 1,692
2020 / 2019 | 1,403 | 717
Prior | 1,882 | 1,379
Revolving loans | 75,476 | 73,225
Total | 134,946 | 132,992
Consumer loans | Watch |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
2024 / 2023 |  | 71
2023 / 2022 | 19 |
2022 / 2021 |  | 62
2021 / 2020 | 59 |
Total | 78 | 133
Consumer loans | Substandard |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
2024 / 2023 |  | 33
2023 / 2022 | 9 | 2
2022 / 2021 | 50 | 1
2021 / 2020 | 12 |
Prior | 39 | 41
Revolving loans | 129 | 313
Total | 239 | 390
Commercial loans |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
2024 / 2023 | 46,567 | 140,058
2023 / 2022 | 133,024 | 83,551
2022 / 2021 | 74,585 | 71,273
2021 / 2020 | 66,512 | 10,910
2020 / 2019 | 9,976 | 6,414
Prior | 15,865 | 11,231
Revolving loans | 286,526 | 275,593
Total | 633,055 | 599,030
Commercial loans | Pass |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
2024 / 2023 | 44,938 | 138,500
2023 / 2022 | 131,924 | 83,011
2022 / 2021 | 73,892 | 71,054
2021 / 2020 | 66,157 | 10,723
2020 / 2019 | 9,773 | 6,239
Prior | 15,036 | 10,657
Revolving loans | 284,041 | 272,710
Total | 625,761 | 592,894
Commercial loans | Watch |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
2024 / 2023 | 1,227 | 698
2023 / 2022 | 576 | 211
2022 / 2021 | 337 | 91
2021 / 2020 | 286 | 3
2020 / 2019 | 55 |
Prior | 20 |
Revolving loans | 2,222 | 2,549
Total | 4,723 | 3,552
Commercial loans | Substandard |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
2024 / 2023 | 402 | 860
2023 / 2022 | 524 | 329
2022 / 2021 | 356 | 128
2021 / 2020 | 69 | 184
2020 / 2019 | 148 | 175
Prior | 809 | 574
Revolving loans | 263 | 334
Total | $ 2,571 | $ 2,584

X
- Definition Represents the minimum amount of total loan relationships that are subject to independent annual review. + References No definition available. + Details
Name: | smbc_CreditQualityIndicatorsMinimumLoanRelationshipsSubjectToIndependentLoanReview
Namespace Prefix: | smbc_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Represents the minimum amount of loan relationships which are subject to annual credit analysis. + References No definition available. + Details
Name: | smbc_CreditQualityIndicatorsThresholdOfLendingRelationshipsAnnualCreditAnalysis
Namespace Prefix: | smbc_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

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 Amortized cost excluding accrued interest, of financing receivable originated more than five years prior to current fiscal year. 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 79 -Publisher FASB -URI https://asc.fasb.org//1943274/2147479294/326-20-55-79 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Topic 326 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 6 -Publisher FASB -URI https://asc.fasb.org//1943274/2147479319/326-20-50-6 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Topic 326 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 3B -Publisher FASB -URI https://asc.fasb.org//1943274/2147479319/326-20-50-3B + Details
Name: | us-gaap_FinancingReceivableExcludingAccruedInterestOriginatedMoreThanFiveYearsBeforeCurrentFiscalYear
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Amortized cost excluding accrued interest, of financing receivable that can be withdrawn, repaid, and redrawn. + References Reference 1: http://www.xbrl.org/2003/role/exampleRef -Topic 326 -SubTopic 20 -Name Accounting Standards Codification -Section 55 -Paragraph 79 -Publisher FASB -URI https://asc.fasb.org//1943274/2147479294/326-20-55-79 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Topic 326 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 6 -Publisher FASB -URI https://asc.fasb.org//1943274/2147479319/326-20-50-6 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Topic 326 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 3B -Publisher FASB -URI https://asc.fasb.org//1943274/2147479319/326-20-50-3B + Details
Name: | us-gaap_FinancingReceivableExcludingAccruedInterestRevolving
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Amortized cost excluding accrued interest, of financing receivable originated four years prior to current fiscal year. 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 79 -Publisher FASB -URI https://asc.fasb.org//1943274/2147479294/326-20-55-79 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Topic 326 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 6 -Publisher FASB -URI https://asc.fasb.org//1943274/2147479319/326-20-50-6 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Topic 326 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 3B -Publisher FASB -URI https://asc.fasb.org//1943274/2147479319/326-20-50-3B + Details
Name: | us-gaap_FinancingReceivableExcludingAccruedInterestYearFiveOriginatedFourYearsBeforeCurrentFiscalYear
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Amortized cost excluding accrued interest, of financing receivable originated three years prior to current fiscal year. 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 79 -Publisher FASB -URI https://asc.fasb.org//1943274/2147479294/326-20-55-79 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Topic 326 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 6 -Publisher FASB -URI https://asc.fasb.org//1943274/2147479319/326-20-50-6 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Topic 326 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 3B -Publisher FASB -URI https://asc.fasb.org//1943274/2147479319/326-20-50-3B + Details
Name: | us-gaap_FinancingReceivableExcludingAccruedInterestYearFourOriginatedThreeYearsBeforeCurrentFiscalYear
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Amortized cost excluding accrued interest, of financing receivable originated in current fiscal year. 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 79 -Publisher FASB -URI https://asc.fasb.org//1943274/2147479294/326-20-55-79 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Topic 326 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 6 -Publisher FASB -URI https://asc.fasb.org//1943274/2147479319/326-20-50-6 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Topic 326 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 3B -Publisher FASB -URI https://asc.fasb.org//1943274/2147479319/326-20-50-3B + Details
Name: | us-gaap_FinancingReceivableExcludingAccruedInterestYearOneOriginatedCurrentFiscalYear
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Amortized cost excluding accrued interest, of financing receivable originated two years prior to current fiscal year. 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 79 -Publisher FASB -URI https://asc.fasb.org//1943274/2147479294/326-20-55-79 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Topic 326 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 6 -Publisher FASB -URI https://asc.fasb.org//1943274/2147479319/326-20-50-6 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Topic 326 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 3B -Publisher FASB -URI https://asc.fasb.org//1943274/2147479319/326-20-50-3B + Details
Name: | us-gaap_FinancingReceivableExcludingAccruedInterestYearThreeOriginatedTwoYearsBeforeCurrentFiscalYear
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Amortized cost excluding accrued interest of financing receivable originated in fiscal year prior to current fiscal year. 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 79 -Publisher FASB -URI https://asc.fasb.org//1943274/2147479294/326-20-55-79 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Topic 326 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 6 -Publisher FASB -URI https://asc.fasb.org//1943274/2147479319/326-20-50-6 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Topic 326 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 3B -Publisher FASB -URI https://asc.fasb.org//1943274/2147479319/326-20-50-3B + Details
Name: | us-gaap_FinancingReceivableExcludingAccruedInterestYearTwoOriginatedFiscalYearBeforeCurrentFiscalYear
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 5 -Publisher FASB -URI https://asc.fasb.org//1943274/2147479319/326-20-50-5 Reference 2: http://www.xbrl.org/2003/role/exampleRef -Topic 326 -SubTopic 20 -Name Accounting Standards Codification -Section 55 -Paragraph 79 -Publisher FASB -URI https://asc.fasb.org//1943274/2147479294/326-20-55-79 + Details
Name: | us-gaap_FinancingReceivableRecordedInvestmentLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Details
Name: | us-gaap_InternalCreditAssessmentAxis=us-gaap_PassMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_InternalCreditAssessmentAxis=us-gaap_CriticizedMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_InternalCreditAssessmentAxis=us-gaap_SpecialMentionMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_InternalCreditAssessmentAxis=us-gaap_SubstandardMember
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: |