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Business Combinations - General Narrative (Details) $ in Thousands		3 Months Ended
	Feb. 28, 2020 USD ($) shares	Mar. 31, 2021 USD ($) shares	Mar. 31, 2020 USD ($)	Nov. 23, 2020 USD ($)
Business Acquisition [Line Items]
Conversion ratio		1
Total consideration		$ 0	$ 0
Decision Resources Group
Business Acquisition [Line Items]
Total consideration	$ 964,997
Newly issued ordinary shares (in shares) | shares	2,895,638	2,895,638
Percentage of ownership	100.00%
Pro forma expense increase (decrease)			24,926
Total assets	$ 648,050
Total liabilities	203,029
Fair value of acquired identifiable assets and liabilities	$ 445,021
Transaction costs		$ 24,383	$ 19,762
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
Transaction costs		$ 0

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Business Combinations, Pro Forma, Expense Increase (Decrease)

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

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Ratio applied to the conversion of stock split, for example but not limited to, one share converted to two or two shares converted to one.

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