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Document and Entity Information
May 15, 2020
Cover [Abstract]  
Document Type 8-K
Amendment Flag false
Document Period End Date May 15, 2020
Entity Registrant Name ENTERPRISE FINANCIAL SERVICES CORP
Entity Incorporation, State or Country Code DE
Entity File Number 001-15373
Entity Tax Identification Number 43-1706259
Entity Address, Address Line One 150 North Meramec Avenue
Entity Address, City or Town St. Louis
Entity Address, State or Province MO
Entity Address, Postal Zip Code 63105
City Area Code 314
Local Phone Number 725-5500
Written Communications false
Soliciting Material false
Pre-commencement Tender Offer false
Pre-commencement Issuer Tender Offer false
Entity Emerging Growth Company false
Entity Central Index Key 0001025835
Title of 12(b) Security Common Stock, par value $0.01 per share
Trading Symbol EFSC
Security Exchange Name NASDAQ