XML 128 R110.htm IDEA: XBRL DOCUMENT
v3.10.0.1

Loans and Allowance for Loan Losses (FY) (Details 4) - USD ($) $ in Thousands | Jun. 30, 2018 | Dec. 31, 2017 | Dec. 31, 2016
--- | --- | --- | ---
Financing Receivable, Recorded Investment [Line Items] |  |  |
Total loans | $ 1,575,435 | $ 1,323,258 | $ 813,376
Purchased Credit Impaired Loans [Member] |  |  |
Financing Receivable, Recorded Investment [Line Items] |  |  |
Total loans | 32,658 | 32,794 | 27,193
Purchased Credit Impaired Loans [Member] | Pass [Member] |  |  |
Financing Receivable, Recorded Investment [Line Items] |  |  |
Total loans | 23,800 | 23,558 | 21,173
Purchased Credit Impaired Loans [Member] | Watch [Member] |  |  |
Financing Receivable, Recorded Investment [Line Items] |  |  |
Total loans | 3,084 | 2,637 | 3,289
Purchased Credit Impaired Loans [Member] | Special Mention [Member] |  |  |
Financing Receivable, Recorded Investment [Line Items] |  |  |
Total loans | 2,854 | 538 | 12
Purchased Credit Impaired Loans [Member] | Substandard [Member] |  |  |
Financing Receivable, Recorded Investment [Line Items] |  |  |
Total loans | 2,920 | 5,308 | 2,692
Purchased Credit Impaired Loans [Member] | Doubtful [Member] |  |  |
Financing Receivable, Recorded Investment [Line Items] |  |  |
Total loans | 0 | 753 | 27
All Other Loans [Member] |  |  |
Financing Receivable, Recorded Investment [Line Items] |  |  |
Total loans | 1,542,777 | 1,290,464 | 786,183
All Other Loans [Member] | Pass [Member] |  |  |
Financing Receivable, Recorded Investment [Line Items] |  |  |
Total loans | 1,531,710 | 1,270,417 | 782,438
All Other Loans [Member] | Watch [Member] |  |  |
Financing Receivable, Recorded Investment [Line Items] |  |  |
Total loans | 5,992 | 13,668 | 1,531
All Other Loans [Member] | Special Mention [Member] |  |  |
Financing Receivable, Recorded Investment [Line Items] |  |  |
Total loans | 1,507 | 3,852 | 341
All Other Loans [Member] | Substandard [Member] |  |  |
Financing Receivable, Recorded Investment [Line Items] |  |  |
Total loans | 3,529 | 2,241 | 1,873
All Other Loans [Member] | Doubtful [Member] |  |  |
Financing Receivable, Recorded Investment [Line Items] |  |  |
Total loans | 39 | 286 | 0
Commercial Real Estate [Member] |  |  |
Financing Receivable, Recorded Investment [Line Items] |  |  |
Total loans | 745,864 | 642,988 | 415,208
Commercial Real Estate [Member] | Purchased Credit Impaired Loans [Member] |  |  |
Financing Receivable, Recorded Investment [Line Items] |  |  |
Total loans | 18,474 | 17,903 | 14,943
Commercial Real Estate [Member] | Purchased Credit Impaired Loans [Member] | Pass [Member] |  |  |
Financing Receivable, Recorded Investment [Line Items] |  |  |
Total loans | 14,494 | 14,386 | 11,836
Commercial Real Estate [Member] | Purchased Credit Impaired Loans [Member] | Watch [Member] |  |  |
Financing Receivable, Recorded Investment [Line Items] |  |  |
Total loans | 1,513 | 261 | 1,045
Commercial Real Estate [Member] | Purchased Credit Impaired Loans [Member] | Special Mention [Member] |  |  |
Financing Receivable, Recorded Investment [Line Items] |  |  |
Total loans | 1,393 | 0 | 0
Commercial Real Estate [Member] | Purchased Credit Impaired Loans [Member] | Substandard [Member] |  |  |
Financing Receivable, Recorded Investment [Line Items] |  |  |
Total loans | 1,074 | 3,084 | 2,062
Commercial Real Estate [Member] | Purchased Credit Impaired Loans [Member] | Doubtful [Member] |  |  |
Financing Receivable, Recorded Investment [Line Items] |  |  |
Total loans | 0 | 172 | 0
Commercial Real Estate [Member] | All Other Loans [Member] |  |  |
Financing Receivable, Recorded Investment [Line Items] |  |  |
Total loans | 727,390 | 625,085 | 400,265
Commercial Real Estate [Member] | All Other Loans [Member] | Pass [Member] |  |  |
Financing Receivable, Recorded Investment [Line Items] |  |  |
Total loans | 724,763 | 616,028 | 399,505
Commercial Real Estate [Member] | All Other Loans [Member] | Watch [Member] |  |  |
Financing Receivable, Recorded Investment [Line Items] |  |  |
Total loans | 1,604 | 7,673 | 640
Commercial Real Estate [Member] | All Other Loans [Member] | Special Mention [Member] |  |  |
Financing Receivable, Recorded Investment [Line Items] |  |  |
Total loans | 0 | 1,006 | 0
Commercial Real Estate [Member] | All Other Loans [Member] | Substandard [Member] |  |  |
Financing Receivable, Recorded Investment [Line Items] |  |  |
Total loans | 1,023 | 378 | 120
Commercial Real Estate [Member] | All Other Loans [Member] | Doubtful [Member] |  |  |
Financing Receivable, Recorded Investment [Line Items] |  |  |
Total loans | 0 | 0 | 0
Consumer Real Estate [Member] |  |  |
Financing Receivable, Recorded Investment [Line Items] |  |  |
Total loans | 355,876 | 293,457 | 187,802
Consumer Real Estate [Member] | Purchased Credit Impaired Loans [Member] |  |  |
Financing Receivable, Recorded Investment [Line Items] |  |  |
Total loans | 6,987 | 7,450 | 9,004
Consumer Real Estate [Member] | Purchased Credit Impaired Loans [Member] | Pass [Member] |  |  |
Financing Receivable, Recorded Investment [Line Items] |  |  |
Total loans | 4,558 | 4,151 | 6,811
Consumer Real Estate [Member] | Purchased Credit Impaired Loans [Member] | Watch [Member] |  |  |
Financing Receivable, Recorded Investment [Line Items] |  |  |
Total loans | 898 | 1,345 | 1,577
Consumer Real Estate [Member] | Purchased Credit Impaired Loans [Member] | Special Mention [Member] |  |  |
Financing Receivable, Recorded Investment [Line Items] |  |  |
Total loans | 575 | 456 | 0
Consumer Real Estate [Member] | Purchased Credit Impaired Loans [Member] | Substandard [Member] |  |  |
Financing Receivable, Recorded Investment [Line Items] |  |  |
Total loans | 956 | 1,192 | 616
Consumer Real Estate [Member] | Purchased Credit Impaired Loans [Member] | Doubtful [Member] |  |  |
Financing Receivable, Recorded Investment [Line Items] |  |  |
Total loans | 0 | 306 | 0
Consumer Real Estate [Member] | All Other Loans [Member] |  |  |
Financing Receivable, Recorded Investment [Line Items] |  |  |
Total loans | 348,889 | 286,007 | 178,798
Consumer Real Estate [Member] | All Other Loans [Member] | Pass [Member] |  |  |
Financing Receivable, Recorded Investment [Line Items] |  |  |
Total loans | 343,407 | 279,464 | 177,466
Consumer Real Estate [Member] | All Other Loans [Member] | Watch [Member] |  |  |
Financing Receivable, Recorded Investment [Line Items] |  |  |
Total loans | 3,168 | 2,543 | 550
Consumer Real Estate [Member] | All Other Loans [Member] | Special Mention [Member] |  |  |
Financing Receivable, Recorded Investment [Line Items] |  |  |
Total loans | 949 | 2,627 | 104
Consumer Real Estate [Member] | All Other Loans [Member] | Substandard [Member] |  |  |
Financing Receivable, Recorded Investment [Line Items] |  |  |
Total loans | 1,365 | 1,159 | 678
Consumer Real Estate [Member] | All Other Loans [Member] | Doubtful [Member] |  |  |
Financing Receivable, Recorded Investment [Line Items] |  |  |
Total loans | 0 | 214 | 0
Construction and Land Development [Member] |  |  |
Financing Receivable, Recorded Investment [Line Items] |  |  |
Total loans | 179,431 | 135,409 | 117,869
Construction and Land Development [Member] | Purchased Credit Impaired Loans [Member] |  |  |
Financing Receivable, Recorded Investment [Line Items] |  |  |
Total loans | 5,690 | 5,120 | 1,678
Construction and Land Development [Member] | Purchased Credit Impaired Loans [Member] | Pass [Member] |  |  |
Financing Receivable, Recorded Investment [Line Items] |  |  |
Total loans | 3,973 | 4,134 | 1,019
Construction and Land Development [Member] | Purchased Credit Impaired Loans [Member] | Watch [Member] |  |  |
Financing Receivable, Recorded Investment [Line Items] |  |  |
Total loans | 653 | 649 | 645
Construction and Land Development [Member] | Purchased Credit Impaired Loans [Member] | Special Mention [Member] |  |  |
Financing Receivable, Recorded Investment [Line Items] |  |  |
Total loans | 716 | 0 | 0
Construction and Land Development [Member] | Purchased Credit Impaired Loans [Member] | Substandard [Member] |  |  |
Financing Receivable, Recorded Investment [Line Items] |  |  |
Total loans | 348 | 337 | 14
Construction and Land Development [Member] | Purchased Credit Impaired Loans [Member] | Doubtful [Member] |  |  |
Financing Receivable, Recorded Investment [Line Items] |  |  |
Total loans | 0 | 0 | 0
Construction and Land Development [Member] | All Other Loans [Member] |  |  |
Financing Receivable, Recorded Investment [Line Items] |  |  |
Total loans | 173,741 | 130,289 | 116,191
Construction and Land Development [Member] | All Other Loans [Member] | Pass [Member] |  |  |
Financing Receivable, Recorded Investment [Line Items] |  |  |
Total loans | 172,972 | 129,359 | 115,237
Construction and Land Development [Member] | All Other Loans [Member] | Watch [Member] |  |  |
Financing Receivable, Recorded Investment [Line Items] |  |  |
Total loans | 62 | 383 | 89
Construction and Land Development [Member] | All Other Loans [Member] | Special Mention [Member] |  |  |
Financing Receivable, Recorded Investment [Line Items] |  |  |
Total loans | 160 | 0 | 0
Construction and Land Development [Member] | All Other Loans [Member] | Substandard [Member] |  |  |
Financing Receivable, Recorded Investment [Line Items] |  |  |
Total loans | 547 | 547 | 865
Construction and Land Development [Member] | All Other Loans [Member] | Doubtful [Member] |  |  |
Financing Receivable, Recorded Investment [Line Items] |  |  |
Total loans | 0 | 0 | 0
Commercial and Industrial [Member] |  |  |
Financing Receivable, Recorded Investment [Line Items] |  |  |
Total loans | 279,771 | 238,087 | 85,022
Commercial and Industrial [Member] | Purchased Credit Impaired Loans [Member] |  |  |
Financing Receivable, Recorded Investment [Line Items] |  |  |
Total loans | 821 | 858 | 1,568
Commercial and Industrial [Member] | Purchased Credit Impaired Loans [Member] | Pass [Member] |  |  |
Financing Receivable, Recorded Investment [Line Items] |  |  |
Total loans | 210 | 68 | 1,507
Commercial and Industrial [Member] | Purchased Credit Impaired Loans [Member] | Watch [Member] |  |  |
Financing Receivable, Recorded Investment [Line Items] |  |  |
Total loans | 2 | 120 | 22
Commercial and Industrial [Member] | Purchased Credit Impaired Loans [Member] | Special Mention [Member] |  |  |
Financing Receivable, Recorded Investment [Line Items] |  |  |
Total loans | 153 | 58 | 12
Commercial and Industrial [Member] | Purchased Credit Impaired Loans [Member] | Substandard [Member] |  |  |
Financing Receivable, Recorded Investment [Line Items] |  |  |
Total loans | 456 | 588 | 0
Commercial and Industrial [Member] | Purchased Credit Impaired Loans [Member] | Doubtful [Member] |  |  |
Financing Receivable, Recorded Investment [Line Items] |  |  |
Total loans | 0 | 24 | 27
Commercial and Industrial [Member] | All Other Loans [Member] |  |  |
Financing Receivable, Recorded Investment [Line Items] |  |  |
Total loans | 278,950 | 237,229 | 83,454
Commercial and Industrial [Member] | All Other Loans [Member] | Pass [Member] |  |  |
Financing Receivable, Recorded Investment [Line Items] |  |  |
Total loans | 277,384 | 233,942 | 82,992
Commercial and Industrial [Member] | All Other Loans [Member] | Watch [Member] |  |  |
Financing Receivable, Recorded Investment [Line Items] |  |  |
Total loans | 1,035 | 3,007 | 252
Commercial and Industrial [Member] | All Other Loans [Member] | Special Mention [Member] |  |  |
Financing Receivable, Recorded Investment [Line Items] |  |  |
Total loans | 35 | 64 | 0
Commercial and Industrial [Member] | All Other Loans [Member] | Substandard [Member] |  |  |
Financing Receivable, Recorded Investment [Line Items] |  |  |
Total loans | 483 | 157 | 210
Commercial and Industrial [Member] | All Other Loans [Member] | Doubtful [Member] |  |  |
Financing Receivable, Recorded Investment [Line Items] |  |  |
Total loans | 13 | 59 | 0
Consumer and Other [Member] |  |  |
Financing Receivable, Recorded Investment [Line Items] |  |  |
Total loans | 14,493 | 13,317 | 7,475
Consumer and Other [Member] | Purchased Credit Impaired Loans [Member] |  |  |
Financing Receivable, Recorded Investment [Line Items] |  |  |
Total loans | 686 | 1,463 | 0
Consumer and Other [Member] | Purchased Credit Impaired Loans [Member] | Pass [Member] |  |  |
Financing Receivable, Recorded Investment [Line Items] |  |  |
Total loans | 565 | 819 | 0
Consumer and Other [Member] | Purchased Credit Impaired Loans [Member] | Watch [Member] |  |  |
Financing Receivable, Recorded Investment [Line Items] |  |  |
Total loans | 18 | 262 | 0
Consumer and Other [Member] | Purchased Credit Impaired Loans [Member] | Special Mention [Member] |  |  |
Financing Receivable, Recorded Investment [Line Items] |  |  |
Total loans | 17 | 24 | 0
Consumer and Other [Member] | Purchased Credit Impaired Loans [Member] | Substandard [Member] |  |  |
Financing Receivable, Recorded Investment [Line Items] |  |  |
Total loans | 86 | 107 | 0
Consumer and Other [Member] | Purchased Credit Impaired Loans [Member] | Doubtful [Member] |  |  |
Financing Receivable, Recorded Investment [Line Items] |  |  |
Total loans | 0 | 251 | 0
Consumer and Other [Member] | All Other Loans [Member] |  |  |
Financing Receivable, Recorded Investment [Line Items] |  |  |
Total loans | 13,807 | 11,854 | 7,475
Consumer and Other [Member] | All Other Loans [Member] | Pass [Member] |  |  |
Financing Receivable, Recorded Investment [Line Items] |  |  |
Total loans | 13,184 | 11,624 | 7,238
Consumer and Other [Member] | All Other Loans [Member] | Watch [Member] |  |  |
Financing Receivable, Recorded Investment [Line Items] |  |  |
Total loans | 123 | 62 | 0
Consumer and Other [Member] | All Other Loans [Member] | Special Mention [Member] |  |  |
Financing Receivable, Recorded Investment [Line Items] |  |  |
Total loans | 363 | 155 | 237
Consumer and Other [Member] | All Other Loans [Member] | Substandard [Member] |  |  |
Financing Receivable, Recorded Investment [Line Items] |  |  |
Total loans | 111 | 0 | 0
Consumer and Other [Member] | All Other Loans [Member] | Doubtful [Member] |  |  |
Financing Receivable, Recorded Investment [Line Items] |  |  |
Total loans | $ 26 | $ 13 | $ 0

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

X
- Definition Amount before allowance and after deduction of deferred interest and fees, unamortized costs and premiums and discounts from face amounts, of loans and leases held in portfolio, including but not limited to, commercial and consumer loans. Excludes loans and leases covered under loss sharing agreements. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 45 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=82891408&loc=d3e4428-111522 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 4 -URI http://asc.fasb.org/extlink&oid=84173941&loc=d3e5074-111524 + Details
Name: | us-gaap_LoansAndLeasesReceivableNetOfDeferredIncome
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Details
Name: | us-gaap_CreditLossStatusAxis=us-gaap_FinancialAssetAcquiredWithCreditDeteriorationMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_InternalCreditAssessmentAxis=us-gaap_PassMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_InternalCreditAssessmentAxis=smbk_WatchMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_InternalCreditAssessmentAxis=us-gaap_SpecialMentionMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_InternalCreditAssessmentAxis=us-gaap_SubstandardMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_InternalCreditAssessmentAxis=us-gaap_DoubtfulMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_CreditLossStatusAxis=smbk_ReceivablesOtherthanReceivablesAcquiredwithDeterioratedCreditQualityMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FinancingReceivablePortfolioSegmentAxis=us-gaap_CommercialRealEstatePortfolioSegmentMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FinancingReceivablePortfolioSegmentAxis=us-gaap_ResidentialPortfolioSegmentMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FinancingReceivablePortfolioSegmentAxis=smbk_ConstructionPortfolioSegmentMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FinancingReceivablePortfolioSegmentAxis=us-gaap_CommercialPortfolioSegmentMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FinancingReceivablePortfolioSegmentAxis=us-gaap_ConsumerPortfolioSegmentMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |