XML 85 R73.htm IDEA: XBRL DOCUMENT
v3.20.2

Commitments and Contingent Liabilities (Details) - USD ($) $ in Thousands | Jun. 30, 2020 | Dec. 31, 2019
--- | --- | ---
Commitments and Contingencies Disclosure [Abstract] |  |
Commitments to extend credit | $ 506,720 | $ 384,411
Standby letters of credit | $ 6,543 | $ 11,727

X
- Definition Contractual amount for all off-balance sheet commitments. + References No definition available. + Details
Name: | smbk_OutstandingOffBalanceSheetRisksAmountLiability
Namespace Prefix: | smbk_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- References No definition available. + Details
Name: | us-gaap_CommitmentsAndContingenciesDisclosureAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Unused amount of commitments to extend credit to customers. + References No definition available. + Details
Name: | us-gaap_UnusedCommitmentsToExtendCredit
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant