XML 34 R86.htm IDEA: XBRL DOCUMENT v2.4.1.9
Note 9 - Other Borrowings and Subordinated Debentures (Details) - Debt (Parentheticals)
 12 Months Ended
Dec. 31, 2014
Dec. 31, 2013
Note 9 - Other Borrowings and Subordinated Debentures (Details) - Debt (Parentheticals) [Line Items]    
Floating rate 3.25%us-gaap_DebtInstrumentBasisSpreadOnVariableRate1 3.25%us-gaap_DebtInstrumentBasisSpreadOnVariableRate1
FHLB Advances [Member] | Minimum [Member]    
Note 9 - Other Borrowings and Subordinated Debentures (Details) - Debt (Parentheticals) [Line Items]    
FHLB advances, interest rate 0.35%us-gaap_DebtInstrumentInterestRateStatedPercentage
/ us-gaap_LongtermDebtTypeAxis
= sfnc_FHLBAdvancesMember
/ us-gaap_RangeAxis
= us-gaap_MinimumMember		 0.35%us-gaap_DebtInstrumentInterestRateStatedPercentage
/ us-gaap_LongtermDebtTypeAxis
= sfnc_FHLBAdvancesMember
/ us-gaap_RangeAxis
= us-gaap_MinimumMember
FHLB Advances [Member] | Maximum [Member]    
Note 9 - Other Borrowings and Subordinated Debentures (Details) - Debt (Parentheticals) [Line Items]    
FHLB advances, interest rate 8.41%us-gaap_DebtInstrumentInterestRateStatedPercentage
/ us-gaap_LongtermDebtTypeAxis
= sfnc_FHLBAdvancesMember
/ us-gaap_RangeAxis
= us-gaap_MaximumMember		 8.41%us-gaap_DebtInstrumentInterestRateStatedPercentage
/ us-gaap_LongtermDebtTypeAxis
= sfnc_FHLBAdvancesMember
/ us-gaap_RangeAxis
= us-gaap_MaximumMember
Trust Preferred Securities Due 12/30/2033 Floating Rate of 2.8% Above Three Month LIBOR 1 [Member]    
Note 9 - Other Borrowings and Subordinated Debentures (Details) - Debt (Parentheticals) [Line Items]    
Floating rate 2.80%us-gaap_DebtInstrumentBasisSpreadOnVariableRate1
/ us-gaap_LongtermDebtTypeAxis
= sfnc_TrustPreferredSecuritiesDue12302033FloatingRateOf2point8AboveThreeMonthLibor1Member		 2.80%us-gaap_DebtInstrumentBasisSpreadOnVariableRate1
/ us-gaap_LongtermDebtTypeAxis
= sfnc_TrustPreferredSecuritiesDue12302033FloatingRateOf2point8AboveThreeMonthLibor1Member