XML 97 R85.htm IDEA: XBRL DOCUMENT
v3.24.3

Regulatory Matters (Narrative) (Details) - USD ($) $ / shares in Units, $ in Millions | 9 Months Ended
--- | ---
Sep. 30, 2024 | Sep. 30, 2023
Banking and Thrift [Abstract] |  |
Dividends | $ 17.5 |
Common stock dividends, quarterly (in dollars per share) |  | $ 0.08

X
- Definition Common Stock, Dividends, Per Share + References No definition available. + Details
Name: | smbk_CommonStockDividendsPerShare
Namespace Prefix: | smbk_
Data Type: | dtr-types:perShareItemType
Balance Type: | na
Period Type: | duration

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

X
- Definition Amount of paid and unpaid cash, stock, and paid-in-kind (PIK) dividends declared, for example, but not limited to, common and preferred stock. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Topic 505 -SubTopic 10 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.3-04) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480008/505-10-S99-1 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Section 45 -Paragraph 2 -SubTopic 405 -Topic 942 -Publisher FASB -URI https://asc.fasb.org/1943274/2147477787/942-405-45-2 + Details
Name: | us-gaap_Dividends
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration