Business Acquisition, Consecutive Trading Days

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- Definition

Business Combination, Consideration Transferred, Equity Interests Issued or Issuable, Percent

+ References

No definition available.

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- Definition

Business Combination, Consideration Transferred, Equity Interests Issued or Issuable, Price per Share

+ References

No definition available.

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- Definition

Business Combination, Consideration Transferred, Payments to Acquire Business, Percent

+ References

No definition available.

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- Definition

Business combination exchange of shares.

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No definition available.

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- Definition

Business Combination, Provisional Information, Initial Accounting Incomplete, Adjustment, Fair Value

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No definition available.

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- Definition

Business Combination, Shares Issued Upon Conversion

+ References

No definition available.

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- Definition

Number of shares of equity interests issued or issuable to acquire entity.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 805
-SubTopic 30
-Section 50
-Paragraph 1
-Subparagraph (b)(4)
-URI http://asc.fasb.org/extlink&oid=35744584&loc=d3e6927-128479

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- 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

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- Definition

Percentage of voting equity interests acquired at the acquisition date in the business combination.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 805
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (c)
-URI http://asc.fasb.org/extlink&oid=79982066&loc=d3e1392-128463

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- Definition

Price of a single share of a number of saleable stocks paid or offered to be paid in a business combination.

+ References

No definition available.

+ Details

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- Definition

The pro forma net Income or Loss for the period as if the business combination or combinations had been completed at the beginning of a period.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 805
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (h)(3)
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- Definition

The pro forma revenue for a period as if the business combination or combinations had been completed at the beginning of the period.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 805
-SubTopic 10
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- Definition

This element represents the amount of earnings or loss of the acquiree since the acquisition date included in the consolidated income statement for the reporting period.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 805
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (h)(1)
-URI http://asc.fasb.org/extlink&oid=79982066&loc=d3e1392-128463

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- Definition

This element represents the amount of revenue of the acquiree since the acquisition date included in the consolidated income statement for the reporting period.

+ References

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-Publisher FASB
-Name Accounting Standards Codification
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- Definition

Amount after accumulated impairment loss of an asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized.

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-Publisher FASB
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- Definition

Amount of increase (decrease) from adjustments after acquisition date under purchase accounting of an asset representing the future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized.

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- Definition

Generally recurring costs associated with normal operations except for the portion of these expenses which can be clearly related to production and included in cost of sales or services. Includes selling, general and administrative expense.

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- Definition

The cash outflow associated with the acquisition of business during the period. The cash portion only of the acquisition price.

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Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
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-SubTopic 30
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Business Combinations - Narrative (Details) - USD ($) $ / shares in Units, $ in Thousands					3 Months Ended		9 Months Ended
	May 01, 2018	Apr. 27, 2018	Nov. 01, 2017	May 19, 2017	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Atlantic Capital Bank, N.A. [Member]
Business Acquisition [Line Items]
Cash consideration paid				$ 1,183
Pro-forma revenue					$ 450		$ 1,200
Pro-forma net income					217		258
Goodwill				$ 660
Capstone Bancshares Inc. [Member]
Business Acquisition [Line Items]
Cash consideration paid			$ 15,826
Pro-forma revenue					6,600		21,100
Pro-forma net income					3,400		9,800
Exchange of shares			0.85
Cash payment per share (in dollars per share)			$ 18.50
Percentage of common stock consideration transferred			80.00%
Percentage of cash consideration transferred			20.00%
Voting interests acquired			74.00%
Goodwill			$ 38,058
Pro forma revenue, acquisition						$ 6,200		$ 18,800
Pro forma net income (loss)						237		710
Fair value adjustment					11
Common stock issued (in shares)			2,908,094
Market price of SMBK common stock (in dollars per share)			$ 23.49
Tennessee Bancshares [Member]
Business Acquisition [Line Items]
Cash consideration paid	$ 5
Pro-forma revenue					3,200		5,500
Pro-forma net income					$ 1,100		1,900
Voting interests acquired	89.00%
Goodwill	$ 15,779
Pro forma revenue, acquisition						3,700		11,000
Pro forma net income (loss)						$ 909		$ 2,700
Common shares converted (in shares)	0.8065
Common stock issued (in shares)	1,458,981
Consecutive trading days		10 days
Market price of SMBK common stock (in dollars per share)	$ 23.85
Fair value adjustment							51
Weighted Average [Member] \| Tennessee Bancshares [Member]
Business Acquisition [Line Items]
Market price of SMBK common stock (in dollars per share)		$ 23.92
Pro Forma [Member] \| Capstone Bancshares Inc. [Member]
Business Acquisition [Line Items]
Expenses							4,600
Pro Forma [Member] \| Tennessee Bancshares [Member]
Business Acquisition [Line Items]
Expenses							$ 2,000