Goodwill (Details) - USD ($) $ in Thousands	1 Months Ended	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2023	Dec. 31, 2022
Goodwill [Roll Forward]
Beginning balance		$ 237,810	$ 222,855
Acquisition			15,892
Foreign currency translation and other adjustments		160	(937)
Ending balance	$ 237,810	237,970	237,810
Contract talent solutions
Goodwill [Roll Forward]
Beginning balance		134,118	134,584
Acquisition			0
Foreign currency translation and other adjustments		169	(466)
Ending balance	134,118	134,287	134,118
Permanent placement talent solutions
Goodwill [Roll Forward]
Beginning balance		26,098	26,189
Acquisition			0
Foreign currency translation and other adjustments		33	(91)
Ending balance	26,098	26,131	26,098
Protiviti
Goodwill [Roll Forward]
Beginning balance		77,594	62,082
Acquisition	15,900		15,892
Foreign currency translation and other adjustments		(42)	(380)
Ending balance	$ 77,594	$ 77,552	$ 77,594