Goodwill (Details) $ in Thousands	6 Months Ended
	Jun. 30, 2023 USD ($)
Goodwill [Roll Forward]
Goodwill, beginning balance	$ 237,810
Foreign currency translation and other adjustments	412
Goodwill, ending balance	238,222
Contract talent solutions
Goodwill [Roll Forward]
Goodwill, beginning balance	134,118
Foreign currency translation and other adjustments	132
Goodwill, ending balance	134,250
Permanent placement talent solutions
Goodwill [Roll Forward]
Goodwill, beginning balance	26,098
Foreign currency translation and other adjustments	26
Goodwill, ending balance	26,124
Protiviti
Goodwill [Roll Forward]
Goodwill, beginning balance	77,594
Foreign currency translation and other adjustments	254
Goodwill, ending balance	$ 77,848