Fair Value Measurements	3 Months Ended
Fair Value Measurements	Mar. 31, 2017
Fair Value Disclosures [Abstract]
Fair Value Measurements	Fair Value Measurements There were no transfers into or out of Level 1, 2 or 3 assets or liabilities during the three months ended March 31, 2017. Kforce’s financial statements include a contingent consideration liability related to a non-significant acquisition of a business within our GS reporting segment, which is measured on a recurring basis and is recorded at fair value, determined using the discounted cash flow method. The inputs used to calculate the fair value of the contingent consideration liability are considered to be Level 3 inputs due to the lack of relevant market activity and significant management judgment. An increase in future cash flows may result in a higher estimated fair value while a decrease in future cash flows may result in a lower estimated fair value of the contingent consideration liability. Remeasurements to fair value are recorded in Other expense, net within the accompanying Unaudited Condensed Consolidated Statements of Operations and Comprehensive Income. There was no activity during the period in our recurring Level 3 fair value measurements. The contingent consideration liability is recorded in Other long-term liabilities within the accompanying Unaudited Condensed Consolidated Balance Sheets and the estimated fair value as of March 31, 2017 and December 31, 2016 was $756 thousand. Certain assets, in specific circumstances, are measured at fair value on a non-recurring basis utilizing Level 3 inputs such as goodwill, other intangible assets and other long-lived assets. For these assets, measurement at fair value in periods subsequent to their initial recognition would be applicable if one or more of these assets were determined to be impaired.

The entire disclosure for the fair value of financial instruments (as defined), including financial assets and financial liabilities (collectively, as defined), and the measurements of those instruments as well as disclosures related to the fair value of non-financial assets and liabilities. Such disclosures about the financial instruments, assets, and liabilities would include: (1) the fair value of the required items together with their carrying amounts (as appropriate); (2) for items for which it is not practicable to estimate fair value, disclosure would include: (a) information pertinent to estimating fair value (including, carrying amount, effective interest rate, and maturity, and (b) the reasons why it is not practicable to estimate fair value; (3) significant concentrations of credit risk including: (a) information about the activity, region, or economic characteristics identifying a concentration, (b) the maximum amount of loss the entity is exposed to based on the gross fair value of the related item, (c) policy for requiring collateral or other security and information as to accessing such collateral or security, and (d) the nature and brief description of such collateral or security; (4) quantitative information about market risks and how such risks are managed; (5) for items measured on both a recurring and nonrecurring basis information regarding the inputs used to develop the fair value measurement; and (6) for items presented in the financial statement for which fair value measurement is elected: (a) information necessary to understand the reasons for the election, (b) discussion of the effect of fair value changes on earnings, (c) a description of [similar groups] items for which the election is made and the relation thereof to the balance sheet, the aggregate carrying value of items included in the balance sheet that are not eligible for the election; (7) all other required (as defined) and desired information.