XML 113 R95.htm IDEA: XBRL DOCUMENT
v3.10.0.1

Related Party Transactions (Q2) (Details) - Director [Member] | Mar. 01, 2018 Director $ / shares shares
--- | ---
Related Party Transaction [Line Items] |
Number of shares sold (in shares) | 21,250
Number of directors | Director | 2
Price per share (in dollars per share) | $ / shares | $ 21.70
Steven B. Tucker [Member] |
Related Party Transaction [Line Items] |
Stock purchased (in shares) | 6,250
W. Miller Welborn [Member] |
Related Party Transaction [Line Items] |
Stock purchased (in shares) | 15,000

X
- Definition Related Party Transaction, Number Of Related Parties + References No definition available. + Details
Name: | smbk_RelatedPartyTransactionNumberOfRelatedParties
Namespace Prefix: | smbk_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | instant

X
- Definition Related Party Transaction, Stock Purchased + References No definition available. + Details
Name: | smbk_RelatedPartyTransactionStockPurchased
Namespace Prefix: | smbk_
Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | duration

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_RelatedPartyTransactionLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition The number of shares issued or sold by the subsidiary or equity method investee per stock transaction. + References No definition available. + Details
Name: | us-gaap_SaleOfStockNumberOfSharesIssuedInTransaction
Namespace Prefix: | us-gaap_
Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | duration

X
- Definition Per share amount received by subsidiary or equity investee for each share of common stock issued or sold in the stock transaction. + References No definition available. + Details
Name: | us-gaap_SaleOfStockPricePerShare
Namespace Prefix: | us-gaap_
Data Type: | num:perShareItemType
Balance Type: | na
Period Type: | instant

X
- Details
Name: | us-gaap_RelatedPartyTransactionsByRelatedPartyAxis=us-gaap_DirectorMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_CounterpartyNameAxis=smbk_StevenB.TuckerMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_CounterpartyNameAxis=smbk_W.MillerWelbornMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |