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Acquisition and Divestiture (Details) - USD ($) $ in Thousands	1 Months Ended	3 Months Ended		12 Months Ended
	Sep. 30, 2023	Mar. 31, 2024	Mar. 31, 2023	Dec. 31, 2023	Feb. 28, 2023
Business Acquisition [Line Items]
Gain from sale of divested operation		$ 0	$ 139,316
TalentNeuron
Business Acquisition [Line Items]
Gain from sale of divested operation		139,300		$ 135,400
TalentNeuron
Business Acquisition [Line Items]
Sale of business, consideration					$ 161,100
Gartner Research Products
Business Acquisition [Line Items]
Percent of outstanding membership interests acquired	100.00%
Purchase price	$ 7,900
Payment for contingent consideration liability, investing activities		$ 2,000

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