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Cover Page
Nov. 06, 2020
Sep. 21, 2020
Cover [Abstract]    
Document Type 8-K  
Document Period End Date Nov. 04, 2020  
Entity Registrant Name Kforce Inc  
Entity Incorporation, State or Country Code FL  
Entity File Number 000-26058  
Entity Tax Identification Number 59-3264661  
Entity Address, Address Line One 1001 East Palm Avenue  
Entity Address, City or Town Tampa  
Entity Address, State or Province FL  
Entity Address, Postal Zip Code   33605
City Area Code   813
Local Phone Number 552-5000  
Title of 12(b) Security Common Stock, $0.01 per share  
Trading Symbol KFRC  
Security Exchange Name NASDAQ  
Written Communications false  
Soliciting Material false  
Pre-commencement Tender Offer false  
Pre-commencement Issuer Tender Offer false  
Entity Emerging Growth Company false  
Amendment Flag false  
Entity Central Index Key 0000930420