Discontinued Operations - Narrative (Details) - USD ($) $ in Thousands			7 Months Ended	12 Months Ended
	Jun. 07, 2019	Apr. 01, 2019	Dec. 31, 2019	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Gain on sale of discontinued operations				$ 0	$ 0	$ 79,318
Effective tax rates for discontinued operations						4.40%
Discontinued Operations, Disposed of by Sale | Kforce Government Solutions, Inc.("KGS")
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Total cash purchase price		$ 115,000
Gain on sale of discontinued operations		72,300
Transaction costs		$ 9,600
Discontinued Operations, Disposed of by Sale | TraumaFX
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Total cash purchase price	$ 18,400
Gain on sale of discontinued operations	7,000
Transaction costs	$ 2,200
Working capital adjustment			$ 700
Contingent consideration paid						$ 600