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Note 4 - Other Assets and Other Liabilities Held for Sale (Details Textual) - USD ($) $ in Thousands | Sep. 30, 2017 | Aug. 28, 2017
--- | --- | ---
Other Assets Held-for-sale | $ 182,378 | $ 182,400
Other Liabilities Held-for-sale | $ 176,964 | $ 177,000

X
- Definition Assets held for sale that are classified as other. + References No definition available. + Details
Name: | sfnc_OtherAssetsHeldForSale
Namespace Prefix: | sfnc_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Liabilities held for sale that are classified as other. + References No definition available. + Details
Name: | sfnc_OtherLiabilitiesHeldForSale
Namespace Prefix: | sfnc_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant