XML 61 R50.htm IDEA: XBRL DOCUMENT
v3.23.1

Securities (Schedule of Held-to-maturity, Unrealized Loss on Investments) (Details) - USD ($) $ in Thousands | Mar. 31, 2023 | Dec. 31, 2022
--- | --- | ---
Held-to-maturity: |  |
Less than 12 Months, Fair Value | $ 250 | $ 198,501
Less than 12 Months, Gross Unrealized Losses | $ (20) | $ (14,503)
Less than 12 Months, Number of Securities | 1 | 35
12 Months or Greater, Fair Value | $ 262,922 | $ 62,111
12 Months or Greater, Gross Unrealized Losses | $ (21,584) | $ (10,833)
12 Months or Greater, Number of Securities | 56 | 22
Total, Fair Value | $ 263,172 | $ 260,612
Total, Gross Unrealized Losses | $ (21,604) | $ (25,336)
Total, Number of Securities | 57 | 57
US Treasury Securities [Member] |  |
Held-to-maturity: |  |
Less than 12 Months, Fair Value |  | $ 144,683
Less than 12 Months, Gross Unrealized Losses |  | $ (5,613)
Less than 12 Months, Number of Securities |  | 4
12 Months or Greater, Fair Value | $ 146,064 |
12 Months or Greater, Gross Unrealized Losses | $ (4,178) |
12 Months or Greater, Number of Securities | 4 |
Total, Fair Value | $ 146,064 | $ 144,683
Total, Gross Unrealized Losses | $ (4,178) | $ (5,613)
Total, Number of Securities | 4 | 4
US Government-sponsored Enterprises Debt Securities [Member] |  |
Held-to-maturity: |  |
Less than 12 Months, Fair Value |  | $ 13,048
Less than 12 Months, Gross Unrealized Losses |  | $ (2,503)
Less than 12 Months, Number of Securities |  | 3
12 Months or Greater, Fair Value | $ 43,257 | $ 29,451
12 Months or Greater, Gross Unrealized Losses | $ (6,983) | $ (5,534)
12 Months or Greater, Number of Securities | 13 | 10
Total, Fair Value | $ 43,257 | $ 42,499
Total, Gross Unrealized Losses | $ (6,983) | $ (8,037)
Total, Number of Securities | 13 | 13
Municipal securities [Member] |  |
Held-to-maturity: |  |
Less than 12 Months, Fair Value | $ 250 | $ 40,770
Less than 12 Months, Gross Unrealized Losses | $ (20) | $ (6,387)
Less than 12 Months, Number of Securities | 1 | 28
12 Months or Greater, Fair Value | $ 46,549 | $ 5,375
12 Months or Greater, Gross Unrealized Losses | $ (6,637) | $ (1,163)
12 Months or Greater, Number of Securities | 34 | 7
Total, Fair Value | $ 46,799 | $ 46,145
Total, Gross Unrealized Losses | $ (6,657) | $ (7,550)
Total, Number of Securities | 35 | 35
Mortgage-backed securities (GSEs) [Member] |  |
Held-to-maturity: |  |
12 Months or Greater, Fair Value | $ 27,052 | $ 27,285
12 Months or Greater, Gross Unrealized Losses | $ (3,786) | $ (4,136)
12 Months or Greater, Number of Securities | 5 | 5
Total, Fair Value | $ 27,052 | $ 27,285
Total, Gross Unrealized Losses | $ (3,786) | $ (4,136)
Total, Number of Securities | 5 | 5

X
- Definition Number of investments in debt securities held to maturity, in unrealized loss position, for 12 months or longer, without allowance for credit loss. + References No definition available. + Details
Name: | smbk_DebtSecuritiesHeldToMaturityUnrealizedLossPosition12MonthsOrLongerNumberOfPositions
Namespace Prefix: | smbk_
Data Type: | xbrli:decimalItemType
Balance Type: | na
Period Type: | instant

X
- Definition Number of investments in debt securities held to maturity, in unrealized loss position, for less than 12 months, without allowance for credit loss. + References No definition available. + Details
Name: | smbk_DebtSecuritiesHeldToMaturityUnrealizedLossPositionLessThan12MonthsNumberOfPositions
Namespace Prefix: | smbk_
Data Type: | xbrli:decimalItemType
Balance Type: | na
Period Type: | instant

X
- Definition Amount of accumulated unrealized loss on investment in debt security measured at amortized cost (held-to-maturity), in continuous loss position for 12 months or longer. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 7 -URI https://asc.fasb.org/extlink&oid=126970911&loc=d3e27337-111563 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 6 -Subparagraph (a)(2) -URI https://asc.fasb.org/extlink&oid=126970911&loc=d3e27290-111563 + Details
Name: | us-gaap_HeldToMaturitySecuritiesContinuousUnrealizedLossPosition12MonthsOrLongerAccumulatedLoss
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

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

X
- Definition Amount of accumulated unrealized loss on investment in debt security measured at amortized cost (held-to-maturity), in unrealized loss position. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 6 -Subparagraph (a)(2) -URI https://asc.fasb.org/extlink&oid=126970911&loc=d3e27290-111563 + Details
Name: | us-gaap_HeldToMaturitySecuritiesContinuousUnrealizedLossPositionAccumulatedLoss
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Fair value of investment in debt security measured at amortized cost (held-to-maturity), in unrealized loss position. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 6 -Subparagraph (a)(1) -URI https://asc.fasb.org/extlink&oid=126970911&loc=d3e27290-111563 + Details
Name: | us-gaap_HeldToMaturitySecuritiesContinuousUnrealizedLossPositionFairValue
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Amount of accumulated unrealized loss on investment in debt security measured at amortized cost (held-to-maturity), in continuous loss position for less than 12 months. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 6 -Subparagraph (a)(2) -URI https://asc.fasb.org/extlink&oid=126970911&loc=d3e27290-111563 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 7 -URI https://asc.fasb.org/extlink&oid=126970911&loc=d3e27337-111563 + Details
Name: | us-gaap_HeldToMaturitySecuritiesContinuousUnrealizedLossPositionLessThan12MonthsAccumulatedLoss
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Fair value of investment in debt security measured at amortized cost (held-to-maturity), in continuous unrealized loss position for less than 12 months. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 7 -URI https://asc.fasb.org/extlink&oid=126970911&loc=d3e27337-111563 + Details
Name: | us-gaap_HeldToMaturitySecuritiesContinuousUnrealizedLossPositionLessThanTwelveMonthsFairValue
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Fair value of investment in debt security measured at amortized cost (held-to-maturity), in continuous unrealized loss position for 12 months or longer. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 7 -URI https://asc.fasb.org/extlink&oid=126970911&loc=d3e27337-111563 + Details
Name: | us-gaap_HeldToMaturitySecuritiesContinuousUnrealizedLossPositionTwelveMonthsOrLongerFairValue
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Disclosure regarding factors used to determine that the impairment of securities categorized as held-to-maturity where cost exceeds fair value is not an other than temporary impairment (OTTI). This item contains disclosure of the number of investment positions in the held-to-maturity investments determined to be temporarily impaired. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 6 -Subparagraph (b)(3) -URI https://asc.fasb.org/extlink&oid=126970911&loc=d3e27290-111563 + Details
Name: | us-gaap_HeldToMaturitySecuritiesInUnrealizedLossPositionsQualitativeDisclosureNumberOfPositions
Namespace Prefix: | us-gaap_
Data Type: | xbrli:decimalItemType
Balance Type: | na
Period Type: | instant

X
- Details
Name: | us-gaap_FinancialInstrumentAxis=us-gaap_USTreasurySecuritiesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FinancialInstrumentAxis=us-gaap_USGovernmentSponsoredEnterprisesDebtSecuritiesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FinancialInstrumentAxis=us-gaap_USStatesAndPoliticalSubdivisionsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FinancialInstrumentAxis=us-gaap_MortgageBackedSecuritiesIssuedByUSGovernmentSponsoredEnterprisesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |