XML 24 R38.htm IDEA: XBRL DOCUMENT
v3.20.1

Presentation of Financial Information (Details) $ in Millions | Mar. 31, 2020 USD ($)
--- | ---
COVID-19 [Member] |
Accounts, Notes, Loans and Financing Receivable [Line Items] |
Loan modification, amount | $ 70.1

X
- Definition Financing Receivable, Modifications, Amount + References No definition available. + Details
Name: | smbk_FinancingReceivableModificationsAmount
Namespace Prefix: | smbk_
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 No definition available. + Details
Name: | us-gaap_AccountsNotesAndLoansReceivableLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Details
Name: | us-gaap_LoanRestructuringModificationNameAxis=smbk_COVID19Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |