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Business Combinations - General Narrative (Details) $ in Thousands		1 Months Ended	3 Months Ended		9 Months Ended
	Feb. 28, 2020 USD ($) shares	Mar. 31, 2021 shares	Sep. 30, 2021 USD ($)	Sep. 30, 2020 USD ($)	Sep. 30, 2021 USD ($) shares	Sep. 30, 2020 USD ($)	Nov. 23, 2020 USD ($)
Business Acquisition [Line Items]
Conversion ratio					1
Decision Resources Group
Business Acquisition [Line Items]
Total consideration	$ 964,997
Newly issued ordinary shares (in shares) | shares	2,895,638	2,895,638			2,895,638
Percentage of ownership	100.00%
Total assets	$ 648,050
Total liabilities	201,093
Fair value of acquired identifiable assets and liabilities	$ 446,957
Transaction costs			$ 0	$ 25,237	$ 24,410	$ 50,702
Hanlim IPS
Business Acquisition [Line Items]
Percentage of ownership							100.00%
Total assets							$ 9,869
Total liabilities							3,476
Fair value of acquired identifiable assets and liabilities							$ 6,393

X

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Number of shares of equity interests issued or issuable to acquire entity.

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