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Other Liabilities (Details) - USD ($) $ in Thousands | Dec. 31, 2021 | Dec. 31, 2020
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Other Liabilities Disclosure [Abstract] |  |
General trade and overhead liabilities | $ 459,814 | $ 188,638
Personnel related liabilities | 413,185 | 161,363
Operating lease liabilities (note 23) | 49,949 | 24,334
Facility related liabilities | 12,055 | 9,441
Other liabilities | 7,204 | 8,726
Restructuring liabilities (note 15) | 7,377 | 7,219
Short term government grants | 45 | 48
Other liabilities | 949,629 | 399,769
Amounts due to third parties for reimbursable expenses | $ 323,600 | $ 138,200

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