Summary of Significant Accounting Policies (Policies)	3 Months Ended
Mar. 31, 2022
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 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.
Principles of Consolidation	Principles of ConsolidationThe 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	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.
Earnings per Share	Earnings per ShareBasic 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.
New Accounting Standards	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.

Summary of Significant Accounting Policies (Policies)

3 Months Ended

Mar. 31, 2022

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.

Principles of Consolidation

Principles of ConsolidationThe 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.

Earnings per Share

Earnings per ShareBasic 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.

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.