Cover - shares shares in Thousands	3 Months Ended
	Mar. 31, 2024	Apr. 24, 2024
Cover [Abstract]
Document Type	10-Q
Document Quarterly Report	true
Document Period End Date	Mar. 31, 2024
Document Transition Report	false
Entity File Number	000-26058
Entity Registrant Name	Kforce Inc
Entity Incorporation, State or Country Code	FL
Entity Tax Identification Number	59-3264661
Entity Address, Address Line One	1150 Assembly Drive, Suite 500
Entity Address, City or Town	Tampa
Entity Address, State or Province	FL
Entity Address, Postal Zip Code	33607
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
Entity Current Reporting Status	Yes
Entity Interactive Data Current	Yes
Entity Filer Category	Large Accelerated Filer
Entity Small Business	false
Entity Emerging Growth Company	false
Entity Shell Company	false
Entity Common Stock, Shares Outstanding (in shares)		19,491
Amendment Flag	false
Document Fiscal Year Focus	2024
Document Fiscal Period Focus	Q1
Entity Central Index Key	0000930420
Current Fiscal Year End Date	--12-31