Summary of Significant Accounting Policies (Policies)	9 Months Ended
Summary of Significant Accounting Policies (Policies)	Sep. 30, 2024
Accounting Policies [Abstract]
Basis of Presentation	Basis of Presentation The unaudited condensed consolidated financial statements have been prepared pursuant to the rules and regulations of the SEC regarding interim financial reporting. Accordingly, certain information and footnotes normally required by GAAP for complete financial statements have been condensed or omitted pursuant to those rules and regulations, although management believes that the disclosures made are adequate to make the information not misleading. These unaudited condensed consolidated financial statements should be read in conjunction with the consolidated financial statements and notes thereto included in our 2023 Annual Report on Form 10-K. In management’s opinion, the accompanying unaudited condensed consolidated financial statements reflect all adjustments considered necessary for a fair presentation. The Unaudited Condensed Consolidated Balance Sheet as of December 31, 2023, was derived from our audited Consolidated Balance Sheet as of December 31, 2023, as presented in our 2023 Annual Report on Form 10-K. Certain prior year amounts have been reclassified to conform with the current period presentation.
Principles of Consolidation	Principles of Consolidation The unaudited condensed consolidated financial statements include the accounts of Kforce Inc. and its subsidiaries. All intercompany transactions and balances have been eliminated in consolidation. References in this document to “Kforce,” the “Company,” the “Firm,” “management,” “we,” “our” or “us” refer to Kforce Inc. and its subsidiaries, except where the context indicates otherwise.
Use of Estimates	Use of Estimates The preparation of financial statements in conformity with GAAP requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities and disclosure of contingent assets and liabilities at the date of the financial statements and the reported amounts of revenues and expenses during the reporting period. The most critical of these estimates and assumptions relate to the following: allowance for credit losses; income taxes; self-insured liabilities for health insurance; and the impairment of goodwill. Although these and other estimates and assumptions are based on the best available information, actual results could be materially different from these estimates. Therefore, our accounting estimates and assumptions may change materially in future periods.
Earnings per Share	Earnings per Share Basic earnings per share is computed as net income divided by the weighted average number of common shares outstanding (“WASO”) during the period. WASO excludes unvested shares of restricted stock. Diluted earnings per share is computed by dividing net income by diluted WASO. Diluted WASO includes the effect of potentially dilutive securities, such as unvested shares of restricted stock using the treasury stock method, except where the effect of including potential common shares would be anti-dilutive.
New Accounting Standards	New Accounting Standards Accounting Standards Not Yet Adopted In November 2023, the FASB issued guidance intended to improve reportable segment disclosure requirements through enhancements for significant segment expenses. These amendments clarify circumstances in which an entity can disclose multiple segment measures of profit or loss, provide new segment disclosure requirements for entities with a single reportable segment, and contain other disclosure requirements. This guidance was effective for Kforce on January 1, 2024, and the presentation and disclosure requirements will be first applied retrospectively to our annual disclosures for the year ending December 31, 2024 and interim disclosures beginning January 1, 2025. This new guidance may modify our disclosures, but we do not expect this standard to have a material effect on our consolidated financial statements.