XML 70 R52.htm IDEA: XBRL DOCUMENT
v3.22.2.2

Investment Securities - Textual (Details) - USD ($) | 3 Months Ended | 9 Months Ended |  |  |
--- | --- | --- | --- | --- | ---
Sep. 30, 2022 | Jun. 30, 2022 | Sep. 30, 2021 | Sep. 30, 2022 | Sep. 30, 2021 | Dec. 31, 2021 | Jun. 30, 2021 | Dec. 31, 2020
Debt Securities, Available-for-sale [Line Items] |  |  |  |  |  |  |  |
Debt securities, available-for-sale, transfer to held-to-maturity |  | $ 1,990,000,000 | $ 500,800,000 |  |  |  |  |
Debt securities, held-to-maturity, unrealized gain (loss) | $ (148,300,000) |  | 738,000 |  |  |  |  |
Available-for-sale, transfer to held-to-maturity, gain (loss) |  |  |  | $ 0 |  |  |  |
Held to maturity mortgage backed securities | 3,788,460,000 |  |  | 3,788,460,000 |  | $ 1,530,500,000 |  |
Available for sale mortgage backed securities | 4,484,131,000 |  |  | 4,484,131,000 |  | 7,130,861,000 |  |
Held-to-maturity, interest receivable | 17,700,000 |  |  | 17,700,000 |  |  |  |
Available-for-sale, interest receivable | 16,200,000 |  |  | 16,200,000 |  |  |  |
Available-for-sale securities | 3,937,543,000 |  |  | 3,937,543,000 |  | 7,113,545,000 |  |
Securities valued at less than historical cost, amount | $ 3,878,698,000 |  |  | $ 3,878,698,000 |  |  |  |
Securities valued at less than historical cost (as percent) | 98.50% |  |  | 98.50% |  |  |  |
Securities - AFS | $ 0 |  | 0 | $ 0 | $ (312,000) |  |  |
Provision for credit losses |  |  |  |  | (312,000) |  |  |
Allowance for credit losses on HTM | 1,384,000 | 1,381,000 | 1,279,000 | 1,384,000 | 1,279,000 | 1,279,000 | $ 1,132,000 | $ 2,915,000
Securities pledged as collateral | 3,930,000,000 |  |  | 3,930,000,000 |  | 3,880,000,000 |  |
Realized gains | 8,000 |  | 5,300,000 | 45,000 | 15,900,000 |  |  |
Realized losses | (30,000) |  | (24,500) | $ (271,000) | $ (63,600) |  |  |
Income tax benefit related to security gains (losses) (as percent) |  |  |  | 26.135% | 26.135% |  |  |
Commercial Mortgage Backed Securities |  |  |  |  |  |  |  |
Debt Securities, Available-for-sale [Line Items] |  |  |  |  |  |  |  |
Held to maturity mortgage backed securities | 150,000,000 |  |  | $ 150,000,000 |  | 4,900,000 |  |
Available for sale mortgage backed securities | 1,170,000,000 |  |  | 1,170,000,000 |  | 1,530,000,000 |  |
Residential Mortgage Backed Securities |  |  |  |  |  |  |  |
Debt Securities, Available-for-sale [Line Items] |  |  |  |  |  |  |  |
Held to maturity mortgage backed securities | 1,060,000,000.00 |  |  | 1,060,000,000.00 |  | 65,500,000 |  |
Available for sale mortgage backed securities | 1,500,000,000 |  |  | 1,500,000,000 |  | 2,920,000,000 |  |
State and political subdivisions |  |  |  |  |  |  |  |
Debt Securities, Available-for-sale [Line Items] |  |  |  |  |  |  |  |
Held to maturity mortgage backed securities | 1,865,310,000 |  |  | 1,865,310,000 |  | 1,210,248,000 |  |
Available for sale mortgage backed securities | 1,054,356,000 |  |  | 1,054,356,000 |  | 1,791,097,000 |  |
Available-for-sale securities | 822,509,000 |  |  | 822,509,000 |  | 1,819,658,000 |  |
Securities valued at less than historical cost, amount | 795,657,000 |  |  | 795,657,000 |  |  |  |
Allowance for credit losses on HTM | 107,000 | $ 103,000 | $ 1,196,000 | 107,000 | $ 1,196,000 | $ 1,197,000 | $ 871,000 | $ 2,307,000
State and political subdivisions | Other Credit Enhancement or Insurance |  |  |  |  |  |  |  |
Debt Securities, Available-for-sale [Line Items] |  |  |  |  |  |  |  |
Held to maturity mortgage backed securities | 953,072,000 |  |  | 953,072,000 |  |  |  |
Allowance for credit losses on HTM | $ 0 |  |  | $ 0 |  |  |  |

X
- Definition Debt Securities, Available-for-sale, Credit Loss, Expense (Reversal) + References No definition available. + Details
Name: | sfnc_DebtSecuritiesAvailableForSaleCreditLossExpenseReversal
Namespace Prefix: | sfnc_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Debt Securities, Available-for-Sale, Transfer to Held-to-Maturity, Gain (Loss) + References No definition available. + Details
Name: | sfnc_DebtSecuritiesAvailableForSaleTransferToHeldToMaturityGainLoss
Namespace Prefix: | sfnc_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Debt Securities, Available-for-sale, Interest Receivable + References No definition available. + Details
Name: | sfnc_DebtSecuritiesAvailableforsaleInterestReceivable
Namespace Prefix: | sfnc_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Debt Securities, Held-to-maturity, Interest Receivable + References No definition available. + Details
Name: | sfnc_DebtSecuritiesHeldtomaturityInterestReceivable
Namespace Prefix: | sfnc_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition This item represents the aggregate fair value of investments in debt and equity securities in an unrealized loss position which are categorized as held-to-maturity or available-for-sale as a percentage of the total held-to-maturity and available-for-sale investment portfolio. + References No definition available. + Details
Name: | sfnc_DebtSecuritiesUnrealizedLossPositionQuantitativeDisclosurePercent
Namespace Prefix: | sfnc_
Data Type: | dtr-types:percentItemType
Balance Type: | na
Period Type: | instant

X
- Definition Represents the tax expense/benefit related to security gains/losses as a percentage of the gross amounts. + References No definition available. + Details
Name: | sfnc_IncomeTaxBenefitRelatedToSecurityGainsLossesPercentage
Namespace Prefix: | sfnc_
Data Type: | dtr-types:percentItemType
Balance Type: | na
Period Type: | duration

X
- Definition Amount of increase (decrease) in allowance for credit loss of investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale). + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 326 -SubTopic 30 -Section 50 -Paragraph 9 -URI https://asc.fasb.org/extlink&oid=124269663&loc=SL82922900-210455 + Details
Name: | us-gaap_DebtSecuritiesAvailableForSaleAllowanceForCreditLossPeriodIncreaseDecrease
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | na
Period Type: | duration

X
- Definition Amortized cost excluding accrued interest, before allowance for credit loss, of investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale). + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 326 -SubTopic 30 -Section 45 -Paragraph 1 -URI https://asc.fasb.org/extlink&oid=124258926&loc=SL82898722-210454 + Details
Name: | us-gaap_DebtSecuritiesAvailableForSaleAmortizedCostExcludingAccruedInterestBeforeAllowanceForCreditLoss
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Amount excluding accrued interest, of investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale). + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 326 -SubTopic 30 -Section 45 -Paragraph 1 -URI https://asc.fasb.org/extlink&oid=124258926&loc=SL82898722-210454 + Details
Name: | us-gaap_DebtSecuritiesAvailableForSaleExcludingAccruedInterest
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Amount of realized gain on investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale). + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 9 -Subparagraph (a) -URI https://asc.fasb.org/extlink&oid=126970911&loc=d3e27357-111563 + Details
Name: | us-gaap_DebtSecuritiesAvailableForSaleRealizedGain
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Amount of realized loss on investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale). + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 9 -Subparagraph (a) -URI https://asc.fasb.org/extlink&oid=126970911&loc=d3e27357-111563 + Details
Name: | us-gaap_DebtSecuritiesAvailableForSaleRealizedLoss
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Amount of restricted investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale). + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 954 -SubTopic 210 -Section 45 -Paragraph 4 -URI https://asc.fasb.org/extlink&oid=120413173&loc=SL6242262-115580 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 860 -SubTopic 30 -Section 50 -Paragraph 1A -Subparagraph (b)(1)(i) -URI https://asc.fasb.org/extlink&oid=109249958&loc=SL6224234-111729 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 954 -SubTopic 210 -Section 50 -Paragraph 2 -URI https://asc.fasb.org/extlink&oid=127002003&loc=SL6242269-115581 + Details
Name: | us-gaap_DebtSecuritiesAvailableForSaleRestricted
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Amount of credit loss expense on investment in debt security measured at amortized cost (held-to-maturity) transferred into held-to-maturity out of investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale). + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 45 -Paragraph 8B -URI https://asc.fasb.org/extlink&oid=124260329&loc=SL120268709-111562 + Details
Name: | us-gaap_DebtSecuritiesAvailableForSaleTransferToHeldToMaturityAllowanceForCreditLossExpense
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Amount of investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale), in unrealized loss position without allowance for credit loss. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -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 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 326 -SubTopic 30 -Section 50 -Paragraph 4 -Subparagraph (a)(1) -URI https://asc.fasb.org/extlink&oid=124269663&loc=SL82922888-210455 Reference 3: http://www.xbrl.org/2003/role/exampleRef -Publisher FASB -Name Accounting Standards Codification -Topic 326 -SubTopic 30 -Section 55 -Paragraph 8 -URI https://asc.fasb.org/extlink&oid=121590138&loc=SL82922954-210456 + Details
Name: | us-gaap_DebtSecuritiesAvailableForSaleUnrealizedLossPosition
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Amount, excluding accrued interest, of allowance for credit loss on investment in debt security measured at amortized cost (held-to-maturity). + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 326 -SubTopic 20 -Section 45 -Paragraph 1 -URI https://asc.fasb.org/extlink&oid=124255206&loc=SL82895884-210446 + Details
Name: | us-gaap_DebtSecuritiesHeldToMaturityAllowanceForCreditLossExcludingAccruedInterest
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Amount excluding accrued interest, before allowance for credit loss, of investment in debt security measured at amortized cost (held-to-maturity). + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 326 -SubTopic 20 -Section 50 -Paragraph 5 -Subparagraph (b) -URI https://asc.fasb.org/extlink&oid=124255953&loc=SL82919230-210447 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 326 -SubTopic 20 -Section 50 -Paragraph 3B -URI https://asc.fasb.org/extlink&oid=124255953&loc=SL120267963-210447 Reference 3: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 326 -SubTopic 20 -Section 45 -Paragraph 1 -URI https://asc.fasb.org/extlink&oid=124255206&loc=SL82895884-210446 + Details
Name: | us-gaap_DebtSecuritiesHeldToMaturityExcludingAccruedInterestBeforeAllowanceForCreditLoss
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Amount of unrealized gain (loss) from transfer of investment in debt security measured at amortized cost (held-to-maturity), to investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale) and investment in debt security measured at fair value with change in fair value recognized in net income (trading). + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 10 -Subparagraph (c) -URI https://asc.fasb.org/extlink&oid=126970911&loc=d3e27405-111563 + Details
Name: | us-gaap_HeldToMaturitySecuritiesTransferredSecurityUnrealizedGainLoss
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
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_ScheduleOfAvailableForSaleSecuritiesLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

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

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