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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 | 203,029 |  |  |  |  |  |
Fair value of acquired identifiable assets and liabilities | $ 445,021 |  |  |  |  |  |
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

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