Summary of Significant Accounting Policies	3 Months Ended
Summary of Significant Accounting Policies	Mar. 31, 2022
Accounting Policies [Abstract]
Summary of Significant Accounting Policies	Summary of Significant Accounting Policies Unless otherwise noted below, there have been no material changes to the accounting policies presented in Note 1 - “Summary of Significant Accounting Policies” of the Notes to Consolidated Financial Statements, included in Item 8. Financial Statements and Supplementary Data of the 2021 Annual Report on Form 10-K. 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 2021 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, 2021, was derived from our audited Consolidated Balance Sheet as of December 31, 2021, as presented in our 2021 Annual Report on Form 10-K. Our quarterly operating results are affected by the number of billing days in a particular quarter, the seasonality of our clients’ businesses and increased holiday and vacation days taken. In addition, we typically experience higher costs in the first quarter of each fiscal year as a result of certain U.S. state and federal employment tax resets, which adversely affects our gross profit and overall profitability relative to the remainder of the fiscal year. As such, the results of operations for any interim period may be impacted by these factors, among others, and are not necessarily indicative of, nor comparable to, the results of operations for a full year. 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,” “we,” the “Firm,” “management,” “our” or “us” refer to Kforce Inc. and its subsidiaries, except where the context indicates otherwise. 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, other long-lived assets and the equity method investment. Although these and other estimates and assumptions are based on the best available information, actual results could be materially different from these estimates. In addition, the potential economic consequences of the COVID-19 pandemic, inflationary pressures, and supply constraints, among others, have been and may continue to be uncertain, rapidly changing and difficult to predict. Therefore, our accounting estimates and assumptions might change materially in future periods. Health Insurance Except for certain fully insured health insurance lines of coverage, Kforce retains the risk of loss per participant for each health insurance claim up to $600 thousand in claims annually. Additionally, for all claim amounts exceeding $600 thousand, Kforce retains the risk of loss up to an aggregate annual loss of those claims of $200 thousand. For its partially self-insured lines of coverage, health insurance costs are accrued using estimates to approximate the liability for reported claims and incurred but not reported claims, which are primarily based upon an evaluation of historical claims experience, completion factors determined by an actuary and a qualitative review of our health insurance exposure including the extent of outstanding claims and expected changes in health insurance costs. 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 dilutive 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. For the three months ended March 31, 2022 and 2021, 411 thousand and 429 thousand common stock equivalents were included in the diluted WASO, respectively. For the three months ended March 31, 2022 and 2021, there were 305 thousand and nil anti-dilutive common stock equivalents, respectively. New Accounting Standards Recently Issued Accounting Standards Not Yet Adopted In March 2022, the Financial Accounting Standards Board (FASB) issued Accounting Standards Update (ASU) No. 2022-02, Financial Instruments - Credit Losses (Topic 326) - Trouble Debt Restructurings and Vintage Disclosures. These amendments eliminate the trouble debt restructuring (TDR) recognition and measurement guidance and, instead, require that an entity evaluate (consistent with the accounting for other loan modifications) whether the modification represents a new loan or a continuation of an existing loan. The amendments also enhance existing disclosure requirements and introduce new requirements related to certain modifications of receivables made to borrowers experiencing financial difficulty. ASU 2022-01 is effective for annual periods, including interim periods within those annual periods, beginning after December 15, 2022. Early adoption of this ASU is permitted. We are currently evaluating the impact of ASU 2022-01 on our consolidated financial statements, however, we do not anticipate this having a material impact to our financial statements. In October 2021, the FASB issued ASU No. 2021-08, Business Combinations (Topic 805) - Accounting for Contract Assets and Contract Liabilities from Contracts with Customers. This ASU is intended to improve the accounting for acquired revenue contracts with customers in a business combination by addressing diversity in practice and inconsistency related to: (1) recognition of an acquired contract liability; and (2) payment terms and their effect on subsequent revenue recognized by the acquirer. ASU 2021-08 is effective for annual periods, including interim periods within those annual periods, beginning after December 15, 2022. Early adoption of this ASU is permitted. We are currently evaluating the impact of ASU 2021-08 on our consolidated financial statements. Other recently issued statements have been evaluated but are not listed here as it has been determined that they are not applicable to our Firm.