XML 80 R64.htm IDEA: XBRL DOCUMENT
v3.20.2

Loans and Allowance for Loan Losses - Schedule of Loan Portfolio Aging Analysis (Details) $ in Thousands | 12 Months Ended |
--- | --- | ---
Jun. 30, 2019 USD ($) | Jun. 30, 2020 USD ($)
Number of Purchased Credit Impaired Loans | 1 |
30-59 Days Past Due | Loans Receivable |  |
Financing receivable recorded investment | $ 1,075 | $ 1,686
30-59 Days Past Due | Consumer loans |  |
Financing receivable recorded investment | 128 | 180
30-59 Days Past Due | Commercial loans |  |
Financing receivable recorded investment | 424 | 93
30-59 Days Past Due | Residential Real Estate |  |
Financing receivable recorded investment | 227 | 772
30-59 Days Past Due | Commercial |  |
Financing receivable recorded investment | 296 | 641
60 to 89 Days Past Due | Loans Receivable |  |
Financing receivable recorded investment | 1,126 | 1,977
60 to 89 Days Past Due | Consumer loans |  |
Financing receivable recorded investment | 46 | 53
60 to 89 Days Past Due | Commercial loans |  |
Financing receivable recorded investment | 25 | 1,219
60 to 89 Days Past Due | Residential Real Estate |  |
Financing receivable recorded investment | 1,054 | 378
60 to 89 Days Past Due | Commercial |  |
Financing receivable recorded investment | 1 | 327
Greater than 90 Days Past Due |  |
Purchased Credit Impaired Loans | 3,100 | 0
Greater than 90 Days Past Due | Loans Receivable |  |
Financing receivable recorded investment | 9,409 | 2,730
Greater than 90 Days Past Due | Consumer loans |  |
Financing receivable recorded investment | 176 | 193
Greater than 90 Days Past Due | Commercial loans |  |
Financing receivable recorded investment | 1,902 | 810
Greater than 90 Days Past Due | Residential Real Estate |  |
Financing receivable recorded investment | 1,714 | 654
Greater than 90 Days Past Due | Commercial |  |
Financing receivable recorded investment | 5,617 | 1,073
Total Past Due | Loans Receivable |  |
Financing receivable recorded investment | 11,610 | 6,393
Total Past Due | Consumer loans |  |
Financing receivable recorded investment | 350 | 426
Total Past Due | Commercial loans |  |
Financing receivable recorded investment | 2,351 | 2,122
Total Past Due | Residential Real Estate |  |
Financing receivable recorded investment | 2,995 | 1,804
Total Past Due | Commercial |  |
Financing receivable recorded investment | 5,914 | 2,041
Current | Loans Receivable |  |
Financing receivable recorded investment | 1,854,701 | 2,165,070
Current | Consumer loans |  |
Financing receivable recorded investment | 97,184 | 80,341
Current | Commercial loans |  |
Financing receivable recorded investment | 353,523 | 466,326
Current | Construction Real Estate |  |
Financing receivable recorded investment | 80,134 | 107,472
Current | Residential Real Estate |  |
Financing receivable recorded investment | 488,997 | 625,553
Current | Commercial |  |
Financing receivable recorded investment | 834,863 | 885,378
Total Loans Receivable | Loans Receivable |  |
Financing receivable recorded investment | 1,866,311 | 2,171,463
Total Loans Receivable | Consumer loans |  |
Financing receivable recorded investment | 97,534 | 80,767
Total Loans Receivable | Commercial loans |  |
Financing receivable recorded investment | 355,874 | 468,448
Total Loans Receivable | Construction Real Estate |  |
Financing receivable recorded investment | 80,134 | 107,472
Total Loans Receivable | Residential Real Estate |  |
Financing receivable recorded investment | 491,992 | 627,357
Total Loans Receivable | Commercial |  |
Financing receivable recorded investment | $ 840,777 | $ 887,419

X
- Definition Represents the monetary amount of Financing Receivable Recorded Investment, as of the indicated date. + References No definition available. + Details
Name: | smbc_FinancingReceivableRecordedInvestment
Namespace Prefix: | smbc_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Represents the pure numeric value of Number of Purchased Credit Impaired Loans, during the indicated time period. + References No definition available. + Details
Name: | smbc_NumberOfPurchasedCreditImpairedLoans
Namespace Prefix: | smbc_
Data Type: | xbrli:pureItemType
Balance Type: | na
Period Type: | duration

X
- Definition Represents the monetary amount of Purchased Credit Impaired Loans, as of the indicated date. + References No definition available. + Details
Name: | smbc_PurchasedCreditImpairedLoans
Namespace Prefix: | smbc_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

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

X
- Details
Name: | us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis=us-gaap_LoansReceivableMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FinancialInstrumentAxis=us-gaap_ConsumerLoanMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FinancialInstrumentAxis=us-gaap_CommercialLoanMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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

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

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

X
- Details
Name: | us-gaap_ShortTermDebtTypeAxis=us-gaap_ConstructionLoanPayableMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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